Eddy N O S;Ekwumemgbo P A
001040 Eddy N O S;Ekwumemgbo P A (Chemistry Dep, Ahmadu Bello Univ, Zaria, Kaduna State, Nigeria, Email: nabukeddy@yahoo.com) : Inhibition of the corrosion of mild steel in H2SO4 by penicillin G. Int J pure appl Chem 2009, 4(1-2), 83-9.
The corrosion of mild steel in H2SO4 and its inhibition by penicillin G have been studied using gasometric and thermometric methods of monitoring corrosion. Penicillin G inhibits the corrosion of mild steel by adsorbtion on the surface of mild steel through the mechanism of physical adsorption. Inhibition efficiency of penicillin G decreases with temperature. Values of activation energy calculated for the inhibited corrosion of mild steel were higher than values obtained for the blank. Values of heat of adsorption (enthalpy of adsorption) and free energy of adsorption were negative. Therefore, we concluded that penicillin G retards the corrosion of mild steel and that the adsorption of penicillin G on mild steel is spontaneous and exothermic.
7 illus, 4 tables, 45 ref
Basak S;Roychowdhury U B;Gupta A K
001039 Basak S;Roychowdhury U B;Gupta A K (FSM Dep, IPGME&R, Kolkata) : The chill thrill. Indian Sci Cruiser 2009, 23(1), 17-20.
This article is about one of the most toxic herbicide, the Paraquat, in the beverage Cola which resembles it in appearance. Although the sale of cola has been banned in some areas eg. in Kerala of India by a Government Order No. (Rt)No. 2396/06/Hand FWD dated 10.08.2006 because of its residues of organochlorine pesticides like Chloropyrophos and Malathion, one of the most dangerous quarternary ammonium compound, the Paraquat that resembles cola has not been much mentioned. The cola is a carbonated soft drink sold in stores throughout the world after its recipe was first invented by John Pemberton originally in the name of coca wine in 1885. He intended it as a patent medicine but the patent was bought out by a businessman Asa Griggs Candler, whose marketing tactics led this cola to its dominance of the world of soft drink market throughout the 20th and now the 21st century. In acute toxicity studies using laboratory animals, Paraquat has been shown to be highly toxic by the inhalation route and has been placed in Toxicity Category I (the highest of four levels). However the EPA has determined that particles used in agricultural practices (400-800 nanomicron) are well beyond the respirable range. It shows category II toxicity in the oraLroute and moderately toxic that is category III by the dermal route. Paraquat will cause moderate to severe eye irritation and minimal dermal irritation, and has been placed in toxicity categories II and IV (slightly toxic) for these effects.
30 ref
Zhai Q Z;Yang D
020924 Zhai Q Z;Yang D (Research Center for Nanotechnology, Changchun Univ of Science and Technology, South Campus, 7186 Weixing Road, Changchun 130022, P.R. China, Email: zhaiainezhou@sohu.com) : Phenylating SBA-15 material. Asian J Chem 2009, 21(3), 2207-14.
Benzene (Ph) functionalized mesoporous molecular sieve of SBA-15 [Ph-(SBA-lS)] was synthesized by post-synthesis method using phenyl-triethoxysilane as coupling agent. The products were characterized by means of element analysis, powder X-ray diffraction, infrared spectro-scopy, low-temperature nitrogen adsorption-desorption technique, transmission electron microscopy, thermogravimetry-differential thermal analysis. The results showed that phenyl was successfully grafted to the mesoporous molecular sieve SBA-15. The Ph-(SBA-15) mesoporous molecular sieve still retained the ordered mesoporous structure and possesses high thermal stability.
7 illus, 1 table, 29 ref
Zhai Q Z;Yang D
020923 Zhai Q Z;Yang D (Research Center for Nanotechnology, Changchun Univ of Science and Technology, South Campus, 7186 Weixing Road, Changchun 130022, P.R. China, Email: zhaiqingzhou@sohu.com) : Preparation and characterization of (SBA-15)-rhodamine B host-guest nanocomposite material. Asian J Chem 2009, 21(3), 2198-206.
SBA-15 molecular sieve was prepared by a hydrothermal method using the triblock copolymer poly (ethylene glycol)-block-poly(propyl glycol)-block-poly (ethylene glycol) (EG20PG40EG20) as a template and tetraethyl orthosilicate as silica source. Rhodamine B (RhB) nanoclusters have been successfully prepared in the channels of the SBA-15 molecular sieve host and a (SBA-15)-RhB host-guest nano-composite material was prepared by liquid grafting method. By means of chemical analysis, powder X-ray diffraction, infrared spectroscopy, low-temperature nitrogen adsorption-desorption technique, solid state diffuse reflectance absorption spectroscopy and luminescence studies, the host-guest nanocomposite material was characterized. The results suggested that the guest RhB was successfully encapsulated in the channels of the host SBA-15 molecular sieve and the frameworks of the molecular sieve in the prepared composite materials were retained and highly ordered. The prepared host-guest nanocomposite material (SBA-15)-RhB shows luminescence and it may used as luminescence material.
7 illus, 1 table, 32 ref
Yildirim S;Cimen M;Bayril T
020922 Yildirim S;Cimen M;Bayril T (Agricultural Machinery Dep, Faculty of Agriculture, Adrian Menderes Univ, Aydin, Turkey, Email: ylsado@hotmail.com) : Acidity and fatness in milks from machine milking. Asian J Chem 2009, 21(3), 2482-4.
The objective of this research is to investigate the acidity and fatness in milk of machine milked cows. The data were obtained from 53 machine milked Holstein cows in early and late lactation period. The cows were fed with a total mixed ratio. The milk fat level of early lactation group was significantly lower compared to the late lactation group. The total solids and pH levels of cows did not differ between early lactation and late lactation groups. Milk components of cows were not affected by different lactation number (1 and 2).
^ssc2 tables, 15 ref
Yildirim S;Cimen M
020921 Yildirim S;Cimen M (Agricultural Machinery Dep, Faculty of Agriculture, Adrian Menderes Univ, Aydin, Turkey, Email: ylsado@hotmail.com) : Biochemical factors affecting taste of milks from machine milking. Asian J Chem 2009, 21(3), 2457-60.
The objective of this research is to investigate the biochemical factors affecting taste of milks from machine milking. The data were obtained in winter and summer periods. The milk fat and acidity (sH levels) were the highest in the winter and the lowest in the summer period. However, there were no significant differences in total solids and pH levels between the periods. A decrease in milk fat percentage for summer period can directly lead to taste loss. The most striking conclusion in present study is that the fat means in winter milks from machine milking are suitable for desired taste than summer milks. On the contrary, the acidity (sH levels) in summer milks are more favourable for consumer preference.
2 illus, 13 ref
Yildirim S;Cimen M
020920 Yildirim S;Cimen M (Agricultural Machinery Dep, Faculty of Agriculture, Adnan Menderes Univ, Aydin, Turkey, Email: ylsado@hotmail.com) : Interrelationships of Biochemical Parameters in Milks from Machine Milking. Asian J Chem 2009, 21(3), 2452-6.
The aim of this research is to investigate the relationships between biochemical components in milks from machine milking. The data was obtained from DIMES Company. The milk component levels in this study are consistent with normal values for cows. There was positive correlation between solids and total fat (r = 0.59; p < 0.01) and between solids and milk acidity (sH) (r = 0.75; p < 0.01). But, no relationship was found between solids and pH. There was no correlation between pH and sH levels in machine milking. The fat has a higher correlation with sH (r = 0.64; p < 0.01). This should be useful in calculating the quantity of fat in milk for cheese-making. Relationships between biochemical parameters are also useful in studying the physiology of milk production. Further researches are needed to confirm the findings obtained from machine milking cows in this study.
1 illus, 2 tables, 12 ref
Wadia D N;Patel P M
020919 Wadia D N;Patel P M (Industrial Chemistry Dep, V.P. & R.P.T.P. Science College, Vallabh, Vidyanagar-388 120, Email: drpravinpatel@rediffmail.com) : Synthesis and antimicrobial activities of some acid dyes. Asian J Chem 2009, 21(3), 2141-8.
The study was taken up to test inherent antimicrobial activity of some newly synthesized acid dyes with a view to develop protective clothing from these. All synthesized dyes were tested against common pathogens Escherichia coli, Bacillus subtilis and Bacillus cerus. All dyes were effective and showed zone of inhibition thereby indicating sufficient antimicrobial activity against all the microbes tested. Minimum inhibitory concentration was found to be varying from 5 to 40 μg. The textile material impregnated with these acid dyes, however, showed less antimicrobial activity, as uptake of these dyes in textile material is below minimum inhibitory concentration.
2 illus, 2 tables, 9 ref
Thaware R B;Ingale Y M;Zinjarde R M;Rokde S N;Atkari M V
020918 Thaware R B;Ingale Y M;Zinjarde R M;Rokde S N;Atkari M V (Animal Husbandry & Dairying Section, College of Agriculture, Ramdaspeth, Nagpur) : Preparation of burfi from goat milk blended with varying levels of different fruit pulps. Indian J Dairy Sci 2009, 62(4), 267-71.
Burfi was prepared from goat milk with constant level of sugar (30 per cent by weight of khoaj and different levels (25, 30, 35 and 40 per cent) of mango pulp and 6,8,10 and 12 per cent orange pulp by weight of khoa. The burfi prepared by using 35 per cent mango pulp (T3) secured highest marks and ranked as most acceptable product. The burfi prepared by using 10 per cent orange pulp (TJ secured second highest marks and ranked second as most acceptable product. The fat, protein, ash and total solids content of burfi were found to have decreased with increase in levels of mango and orange pulp. The cost of production was observed to be higher (Rs. 130.57) for burfi with 40 per cent mango pulp (T4) and lowest (Rs 122.05 ) in control(T0). The cost of production of making burfi using 35 per cent mango pulp(T3) which was rated as the best was estimated to be Rs 129.557 kg. From this study it can be concluded that blending of mango pulp @ 35 and 30% sugar by weight of khoa made from goat milk result in superior quality burfi and has highest acceptability. Similarly blending of orange pulp @ 12% and 30% sugar by weight of khoa made from goat milk resulted in moderately good quality burfi. Further, due to addition of mango pulp, there was increase in the cost of production of goat milk burfi whereas, the cost of production of burfi due to addition of orange pulp was comparatively less. Though there was little hike in the cost of production of goat milk burfi due to blending of mango and orange pulp, there was marked enhancement in its quality in terms of better colour and appearance, body and texture, flavour, consumer-acceptability and value addition.
2 tables, 12 ref
Sood S K;Sinha P K
020917 Sood S K;Sinha P K (Animal Biochemistry Div, National Dairy Research Institute, Karnal-132 001) : Acidocin S2 containing powder obtained upon freeze drying of fermented paneer whey reduces total viable count during storage of processed cheese. Indian J Dairy Sci 2009, 62(6), 486-90.
Whey is an important by-product from the cheese manufacturing industry. Disposal of liquid whey is costly due to its high biological oxygen demand (BOD). Whey is a rich source of nutrients. Many different value added products such as lactic acid, vitamins, proteins and functional ingredients can be produced from whey. Developing these processes will help to reduce the waste treatment cost and add to the profitability of the dairy industry. Recently we detected acidocin S2, the first-ever heat stable wide spectrum bacteriocin produced by L. acidophilus S2, a strain isolated from commercial dairy food. The purpose of this project was to utilize paneer whey for production of a bacteriocin containing powder for application as a biopreservative in heat processed dairy foods. The maximum production of acidocin S2 using whey was seen at pH 7.0, 37 °C, @10% inoculum and 18h of incubation. Among nitrogen sources, tryptone was found to enhance production in whey. However, alteration of growth factors could not enhance acidocin S2 production. A food-grade freeze-driedpowder containing acidocin S2 was prepared from whey medium fermented with L. acidophilus S2 under optimized conditions. It was tested in processed, cheese and found effective in reducing total viable count without compromising sensory properties.
2 illus, 1 tables, 20 ref
Shrivastava S;Goyal G K
020916 Shrivastava S;Goyal G K (Food Packaging Lab, Dairy Technology Div, N.D.R.I., Karnal-132 001, Email: gkg@yahoo.com) : Effect of modified atmosphere packaging [MAP] on the chemical quality of paneer. Indian J Dairy Sci 2009, 62(4), 255-61.
Paneer, an acid coagulated indigenous dairy product, is very popular, but its shelf life is quite low being approx 6 days at refrigeration temperature. Hence, a study was planned to increase the shelf life of paneer by employing MAP technique. Two hundred fifty grams of paneer samples were packaged in high barrier bags (LLD/BA/Nylon-6/BA/LDPE) under five different atmospheres (air: atm 1; vacuum: atm 2; 100% CO2; atm 3; 700% N2: atm 4; 50% CO/50% N2: atm 5), and stored at 3±1 M°C. Periodically, the paneer samples were evaluated for changes in chemical quality. The analysis of variance of the data revealed that the MAP had significant influence on moisture, titratable acidity, pH, free fatty acids, tyrosine content, peroxide value and electrophoretic behaviour of protein of the paneer samples during storage.
6 illus, 1 tables, 31 ref
Sharma R;Darshan Lal;Seth R;Wadhwa B K;Rajput Y S
020915 Sharma R;Darshan Lal;Seth R;Wadhwa B K;Rajput Y S (Dairy Chemistry Div, National Dairy Research Institute, Karnal-132 001, Email: rajansharma21@rediffmail.com) : Lactic acid and titratable acidity measurement in formalin preserved milk. Indian J Dairy Sci 2009, 62(2), 96-100.
Addition of formalin for preservation of milk samples is practiced in many countries. Formalin at 0.4% level in milk prevents deterioration of milk samples during prolong storage to enable its analysis by law enforcing agencies. The present paper evaluates the standard methods (BIS, IDF and AOAC) for lactate estimation and BIS method for titratable acidity and their applicability in formalin preserved milk samples. Formalin interfered in factate estimation by BIS method. Preservation of milk with formalin for 72 months resulted in approximately 12 to 23% lower values. In formalin preserved samples, the estimated values of lactic acid during 12 months storage by BIS method were 2 to 3 fold higher as compared to unpreserved milk. Formalin addition to milk resulted in enhanced values of titratable acidity. Lactate estimation by IDF and AOAC methods were not affected by the addition of formalin to milk samples.
1 table, 24 ref
Sahinler N;Gul A;Akyol E;Oksuz A
020914 Sahinler N;Gul A;Akyol E;Oksuz A (Faculty of Agriculture, Mustafa Kemal Univ, Hatay, Turkey, Email: nsahinler@mku.edu.tr) : Heavy metals, trace elements and biochemical composition of different honey produce in Turkey. Asian J Chem 2009, 21(3), 1887-96.
The biochemical composition, trace elements and heavy metal contents of honey samples, which were collected from different regions and different botanical origin in Turkey were evaluated. The average content of minerals, moisture, acidity, hydroxymethylfurfural, diastase, invert sugar, pH, sucrose, electrical conductivity and heavy metal contents were determined. The biochemical composition of different botanical originated honeys were determined within the limits of Turkish Standard Institution (TSE), CODEX and EU standards. Level of invert sugar in cotton honey and sucrose level in sunflower honey weren't found agree with TSE and EU standards. In addition to biochemical compositions, the presence of Al, Ba, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb and Zn were determined agree with ICP AES. The highest value of Cr, Cu, K, Mn, Na and Al, contents were found in pine honeydew honey with a levels of 0.50, 2.14, 1931,1.46, 285, 7.49 mg kg-1, respectively. The highest level of Cd, Co, Mg, Ni and Pb (0.32, 0.22, 103, 0.64, 1.29 mg kg-1) were found in cotton honey. The highest level of Ba and Zn were determined in multifloral honey with a level of 1.47 ppm and 3.29 ppm, respectively. K, Na and Mg were the major macro elements in all honey samples. This study showed that the source of nectar and ecological regions have an important effect on the biochemical compositions, trace elements and heavy metals contents of honey.
1 illus, 4 tables, 30 ref
Patil S V;Patll A V;Chandode R K;Khandagale A B;Salunke B K
020913 Patil S V;Patll A V;Chandode R K;Khandagale A B;Salunke B K (School of Life Sciences, North Maharashtra Univ, Post Box No 80, Umavinagar, Jalgaon-425 001) : Potential of Euphorbia heterophylla L. plant extract to prepare cheese. Indian J Crop Sci 2009, 4(1-2), 93-6.
Potential of Euphorbia heterophylla L plant extract was tested for cheese making capacities. The plant extract had rennet like activity and was able to coagulate milk. The minimum 2.2% of plant extract was required for effective coagulation of milk. The optimum coagulation temperature and time were found to be 70°C and 6 minutes, respectively. The milk coagulating activity was not observed for temperatures of 0-40°C even when high concentration of plant extract was used. Plant extracts stored at 4°C remained active for more than 30 days while storage at room temperature impaired their activity within 24 hours. 10 mM EDTA and 5 mM Cystein were found to stabilize the activity of the rennetting activity of the plant extracts for more than 90 days. The physicochemical properties of the cheese prepared using plant extracts of E. heterophyila were relatively similar to the cheese prepared using rennets from other plant sources. The results from the present study show that plant extracts of Euphorbia heterophylla L may provide a cheap and readily available alternative to rennet.
11 tables, 22 ref
Nlerum F E
020912 Nlerum F E (Agricultural Economics and Extension Dep, Rivers State Univ of Science and Technology, P.M.B. 5080, Nkpolu-Oroworukwo, Port Harcourt, Nigeria) : Prediction of adoption of yam minisett technology among yam farmers in rivers state nigeria. Indian J agric Res 2009, 43(4), 294-8.
This study examined the predictive variables of adoption of yam minisett technology among yam farmers in Rivers State, Nigeria. Multi-stage, cluster, purposive and simple random sampling methods were used in selecting 252 yam farmers as the sample size of the study. An interview schedule was used in obtaining data from the respondents. Results showed that adoption levels were 16.7 per cent for partial adoption, 18.6 percent for complete adoption and 64.7 per cent for none adoption. Results for test of hypothesis indicated that, four out of the six tested variables that had significant relationship with adoption pxpUaned about 89.3 percent (R2=0.8926) of the adoption variability of the respondents. The best predictor of adoption was extension contact, with R2=0.3364 contribution. This was followed by educational level, with R2=0.2440, income, with R2=0.1805 and farm size, with R2=0.1317. Efforts directed at improving extension contact, education, income and farm sizes of yam farmers were suggested for a higher adoption of the minisett technology among these fanners.
3 tables, 9 ref
Naresh L;Venkateshaiah B V;Arun Kumar H; Venkatesh M
020911 Naresh L;Venkateshaiah B V;Arun Kumar H; Venkatesh M (Dairy Technology Dep, Dairy Science College, Hebbal, Bangalore-560 024) : Effect of microwave heat processing on physico-chemical, sensory and shelf life of peda. Indian J Dairy Sci 2009, 62(4), 262-6.
Investigation was carried out to know the suitability of microwave heating as a post heat treatment process to extend the shelf life of peda. Among different microwave heat treatments viz., 10, 20, 25, 30 and 60 seconds with a corresponding temperature of 35, 47, 58, 68 and 91°C tried, the sensory qualities of peda were found to be good up to 25 sec of microwave treatment. The microwave treated peda at 25 sec and 30 sec showed an increased percentage of fat, HMF (m mol/l), acidity (% Lactic acid) and FFA (%oleic acid) content with the decrease in moisture content compared to control. The overall acceptability score of microwave treated sample was almost similar to control sample. The shelf life of microwave treated (25 sec and 30 sec) peda samples increased to 15 days and 18 days at room temperature and 93 days and 126 days at refrigeration temperature as against 12 days and 71, days respectively for control.
3 tables, 14 ref
Mishra P;Bardhan D;Dabas Y P S;Avadhesh Kumar
020910 Mishra P;Bardhan D;Dabas Y P S;Avadhesh Kumar (Vety & A H Extension Dep, CVA Sc, G.B.P.U.A & T., Pantnagar-263 145) : Factors influencing and impact of package of selected dairy husbandry technologies. Indian J Dairy Sci 2009, 62(4), 316-26.
Study was carried out on 80 farmers in five randomly selected villages of Rudrapur Block of US Nagar District of Uttarakhand to study the factors influencing and household level impact of adoption of package of selected dairy technologies. The findings revealed that adoption of package of selected dairy technologies was positively and significantly influenced by membership of farmers' group, low farm experience, high mass media exposure and closeness to market. This point towards the importance of providing institutional support services, viz. linkage to market, membership of farmers' group, etc. in ensuring adoption of dairy technologies by the rural households. Human endowments are of secondary importance in uptake decisions of dairy technologies. Findings regarding impact of adoption of package of dairy technologies revealed that adoption of dairy technologies significantly increased the productivity, milk production and income from dairying. Adoption of the technologies also has potential in increasing the household consumption of milk. However, beneficial effects of adoption of dairy technologies were not observed in case of employment generation. This implies that, generally, in the study area, the adopters were able to handle the increased work load, due to adoption of package of technology, without hired assistance, i.e. with engagement of family labour. Overall, it can be said that adoption of dairy technologies has had some favourable impact in the study area. Thus, extension functionaries should work towards promoting technology as technology adoption is key to improving farm productivity and household income.
3 tables, 23 ref
Mei Z;Niu X;Sun J;Qu B
020909 Mei Z;Niu X;Sun J;Qu B (College of Chemistry and Molecular Engineering, Qingdao Univ of Science and Technology, Qingdao-266042, P.R. China, Email: qustchemistry@126.com) : Synthesis and crystal structure of cobalt(ii) complex of 4,4'-diamino-l-[(cyclohexa-2,4-dienyl)methyl]benzene. Asian J Chem 2009, 21(3), 2020-6.
The crystal structure of cobalt(II) complex of 4,4'-diamino-1-[(cyclohexa-2,4-dienyl)methyl]benzene has been determined by single crystal X-ray diffraction method. The crystal belongs to orthorhombic system, space group P1 with unit cell constants a = 9.2500(8), b = 11.6619(10), c = 11.9660(11) Angstrum, V = 1273.36(19) Angstrum3, Z= 1, DC = 1.363 g/cm3, μ = 0.406 mm-1, F(000) = 550, R and wR are 0.0499 and 0.1498, respectively for 5981 unique reflections with 5095 observed reflections (I > 2σ(I)). In the crystal structure, molecules are linked into chains along the a axis by N-H---O intermolecular hydrogen bonds along the a axis.
2 illus, 4 tables, 13 ref
Lounis A;Lenouar K;Gritly Y;Abbad B;Boumaour M
020908 Lounis A;Lenouar K;Gritly Y;Abbad B;Boumaour M (Laboratory of Sciences and Material Engineering, USTHB, BP32 El Alia, Algers, Algeria, Email: zlounis@yahoo.com) : Characterization of polycrystalline silicon substrates (P-type) of Photovoltaic use. Asian J Chem 2009, 21(3), 2149-62.
The quality of the material, polycrystalline silicon, is justified by the required features for the final use of the product. It is considered that this quality is due to the impurities which are present in the metal. Carbon, oxygen, boron and transition metals are catalogued among the most frequently observed impurities in silicon, because of their high mobility and solubility in polycrystalline silicon. These impurities gene-rate a yield decrease in the photovoltaic components. The aim of this work is to determine the concentration of impurities such as carbon, iron, copper, titanium, nickel as well as some properties of the flat product such as thickness, resistance, rigidity, roughness and flatness. The dislocations density is also assessed.
9 illus, 2 tables, 26 ref
Kaushik S;Chhimpa V;Gupta M;Verma P S;Sharma I K
020907 Kaushik S;Chhimpa V;Gupta M;Verma P S;Sharma I K (Chemistry Dep, Centre for Advanced Studies, Rajasthan Univ, Jaipur-302 004, Email: sharma_indra20@rediffmail.com) : Biotransformation of camphor using free and immobilized Saccharomyces cerevisiae. Asian J Chem 2009, 21(3), 2412-18.
The biocatalytic reduction of camphor was carried out using Baker's yeast (Saccharomyces cerevisiae) as microbial catalyst in free Baker's yeast (FBY) as well as immobilized Baker's yeast (ImBY) form in aqueous ethanolic (l:lv/v) medium. The reduction product was isolated and purified by chromatographic techniques and characterized on the basis of its spectral analysis.
3 illus, 1 table, 17 ref
Kaul G;Kumar D M;Thippeswamy H S
020906 Kaul G;Kumar D M;Thippeswamy H S (Lab-Animal Biochemistry Div, National Dairy Research Institute, Karnal-132 001, Email: gkndri@gmil.com) : Detection of IGF-I receptor on caprine spermatozoa by RT-PCR method. Indian J Dairy Sci 2009, 62(4), 275-9.
IGF-I (Insulin like Growth Factor-I) receptor is a glycosylated fieterotetramer transmembrane protein associated with tyrosine kinase activity. Most biological actions of IGF ligands are mediated by IGF-IR (type 1 IGF Receptor). IGF-IR has been identified on sperm head in human and bovines. Present study was undertaken to detect IGF-I receptor on caprine spermatozoa by RT-PCR method. Recent lines of evidences have shown that substantial types of mRNA persist in ejaculated spermatozoa and can be used as a diagnostic as well as research tool. The presence of mRNAs in sperm has clued us to use RT-PCR to detect IGF-IR in caprine spermatozoa. RT PCR was done with caprine sperm total RNA to detect cDNA for IGF-IR using the gene specific primers. The total RNA from liver as control was isolated using acid phenol-guanidinium thiocyanate chloroform extraction method. Absorbance was checked to asses RNA purity. The purity ranged between 1. 75-1.95. RNA was extracted from sperm cells after lysis with 6M guanidinium thiocyanate. The purity ranged between 1.7 - 1.73. The reverse transcription of all mRNA present in total RNA was performed to generate single strand cDNA molecule. The specific cDNA molecules for IGF-IR were amplified using PCR in the presence of forward and backward primers of IGF-IR gene. The amplification was done for 60 cycles at 94°C, 55°C and 71 °C respectively. The cDNA for IGF-IR was identified by agarose gel electrophoresis using liver sample as control. An intense band was observed which most likely corresponded to 550 bps in liver samples and for the sperm samples two intense bands were observed with size of about 350 and 700 bps. In further studies we demonstrated that no cDNA band for IGF-IR was detected with the epididymal spermatozoa.
13 ref
Kart A;Elmali M;Yapar K;Yaman H
020905 Kart A;Elmali M;Yapar K;Yaman H (Food Hygiene and Technology Dep, Veterinary Faculty, Kafkas Univ, Pasacaviri, 36100 Kars, Turkey, Email: elmali25erz@gmail.com) : Occurence of aflatoxin M1 determined by elisa in UHT (sterilized) and raw milk samples produced in Turkey. Asian J Chem 2009, 21(3), 2047-51.
Aflatoxins are secondary metabolites of fungi produced by certain strains of A spergillus spp. They are known to have potent carcinogenic, hepatotoxic, genotoxic and immunusuppressive effects leading to toxi-cities in human and animals. In this study, it was aimed to determine presence of AFMI levels in raw and UHT milk produced in the Kars vicinity of Turkey which is commercialized in big retail markets and to evaluate the toxins levels in milk samples with respect to the levels allowed by Turkish Food Codex. Of the total 90 milk samples analyzed, while 87.8% (79) of the milk samples were found to exceed the limits allowed by Turkish Food Codex, only 12.2% (11) of the total number of milk samples were in accordance with Turkish Food Codex limits. The levels of AFM1 were above the allowed limits in 84.4% (38 out of 45) of UHT milk and 91.1% (41 out of 45) of raw milk samples. The presence of unusually high rate of AFMI levels in both raw and UHT milk samples implies that children and people in all age groups are under risk of being toxicated by AFM1. Therefore, it is important to take preventive actions toward reducing contamination of milk with AFM1.
1 table, 27 ref
Hati S;Gandhi D N
020904 Hati S;Gandhi D N (D.M. Div, National Dairy Research Institute, Karnal-132 001, Email: subrota_dt@yahoo.com) : Keeping quality and acceptability of drinkable acidophilus milk [APM drink] under refrigeration condition. Indian J Dairy Sci 2009, 62(2), 151-4.
Drinkable acidophilus milk is a liquid fermented drink and characterized by their high nutritional and therapeutic values. For process optimization of APM drink the culture was selected on the basis of chemical and microbial analysis among the four different strains of L. acidophilus. L. acidophilus IMCDC-15 culture showed the maximum acidity (0.98-1.20% LA) at 2% level of inoculum when incubated at 40°C for 10 hours. The process parameters were optimized for the preparation of drinkable acidophilus milk such as fat percentage, sugar concentration level, level of stabilizer (Guar gum), percentage of pineapple flavour on the basis of physicochemical, microbial analysis and sensory analysis. The finished product was stored under refrigeration condition (4-5°C) and examined at 7 days interval upto 14 days carrying out chemical, microbial and sensory analysis. The product was acceptable throughout the storage period under refrigeration condition at 4-5°C.
4 illus, 12 ref
Beniwal B S;Rai D C;Kapoor C M;Bhardwaj P K
020903 Beniwal B S;Rai D C;Kapoor C M;Bhardwaj P K (Animal Products Technology Dep, CCS Haryana Agricultural Univ, Hisar-125 004, Email: balbir.beniwal@rediffmail.com) : Standardization of quality and quantity of milk for khoa making through a semi mechanized method. Indian J Dairy Sci 2009, 62(4), 272-4.
Three different ratios of fat/SNF i.e. 0.555, 0.611 and 0.666 were used for production of khoa in a semi automatic khoa making machine. Based on the physico-chemical parameters and sensory evaluation, the fat/SNF ratio of 0.611 was found to be the most suitable for preparation of khoa. Amongst the five different quantities of milk taken for preparation of khoa, a quantity of 15 Kg of milk was found to be the best for the preparation of khoa in the machine while the other tested quantities (all more than 15 Kg) gave a brown coloured product.
1 illus, 3 tables, 11 ref
Ashrafi R;Bari M R;Khosroshahi A;Alizadeh M
020902 Ashrafi R;Bari M R;Khosroshahi A;Alizadeh M (Food Science Dep, Urmia Univ, Urmia, Iran, Email: rogiehashrafi@yahoo.com ) : Minimization of sodium in Iranian white brined cheese. Asian J Chem 2009, 21(3), 1995-2004.
A chemometric approach was used to minimize NaCl content in Iranian white brine cheese. Influence of different ratios of NaCl:KCl and ripening time on sodium and potassium content, proteolysis, lipolysis, dry matter, TVC, mold count and sensorial quality was explored using a mixture design. Partial substitution of NaCl by KCl did not influence the extent of proteolysis, lipolysis and dry matter. Sodium content of the cheese samples decreased by increasing KC1 concentration in brine. Ripening time had positive effect on both Na and K content of the cheese samples. Increasing in KC1 concentration in brine had significantly negative effect on TVC and mold. All cheeses were free from Coliform. NaCl and KCl concentrations in brine were effective factors on sensory score. After modelling of Na and K variations and regarding sensory score and dry matter the optimum condition for minimization of Na in Iranian white brine cheese were: concentration of KC1 and NaCl in brine were respectively 27.1 and 72.9% and ripening time of 40 d. Na and K contents in the cheese samples made at optimum condition predicted to be 2.43 and 1.32%, respectively. KC1 at concentrations more than 27.7% led to significantly low acceptability.
8 illus, 2 tables, 41 ref
Aroua S;Lounis A;Condom S;Semaoune F
020901 Aroua S;Lounis A;Condom S;Semaoune F (Laboratory of Sciences and Material Engineering, Faculty of Mechanical Engineering and Chemical Engineering, USTHB, BP32 El Alia, Algiers, Algeria, Email: zlounis@yahoo.com) : Analysis of lignin isolated from alkaline leaching of alfa grass. Asian J Chem 2009, 21(3), 2293-300.
The analysis of Alfa grass lignin is examined, isolated from indus-trial black liquor of the Algerian Pulp and Paper Company using the soda process. The used experimental techniques are: UV/visible, micro-scopy (MEB), FTIR, spectroscopy, EDAX and for the first time, HPLC (high performance liquid chromatography), MS (mass spectrometry) and GC/MS (coupled gas chromatography/mass spectrometry) analysis that permit us the valorization of this product.
8 illus, 1 table, 8 ref
Ardic M
020900 Ardic M (Food Hygiene and Technology Dep, Faculty of Veterinary Medicine, Harran Univ, 63300 Sanliurfa, Turkey, Email: mardic@harran.edu.tr) : Occurrence of aflatoxin M1 in raw ewe's milk produced in Sanliurfa, Turkey. Asian J Chem 2009, 21(3), 1966-70.
The presence and concentration range of aflatoxin M1 (AFM1) were investigated by Enzyme Linked Immunosorbent Assay (EL1SA) technique in 90 samples of raw ewe's milk obtained from 2 dairies in Sanliurfa, Turkey. Analytical results showed that 88.9% of the samples were contaminated with AFM1. A total of 61.1% of the samples tested exceeded 50 ng/L set by the Turkish and European regulations for AFMi in raw milk. AFM1 levels ranged from 17 to 232 ng/L and mean value was 89.89 ng/L. The incidence of AFM1 in milk from these dairies was 77.8 and 100%, respectively. As a result, high incidence and levels of AFM1 in raw milk samples produced in Sanliurfa were determined.
1 table, 32 ref
Yadav G D
015560 Yadav G D (Chemical Technology Dep, (UDCT), Matunga, Mumbai-400 019, Email: gdyadav@yahoo.com) : Green chemistry and engineering in the design of safer, beign and efficatious chemicals for agro, pharmaceuticals and dyestuff industries. Indian chem Engr 2009, 51(Spl), 78-97.
The manufacturing of agro, dyestuff, pharma and other speciality chemicals not only produces a lot of waste reducing the atom economy but the toxicology of these chemicals is also a cause of concern. They have indeed given a bad name to the chemical industry. However, fundamental analysis of toxicology of the molecule will be helpful in creating totally benign alternate molecules, which are as efficacious as their original function. Design of safer chemicals invokes the use of molecular structural design and consideration of the principles of toxicity and mechanism of action to minimise the intrinsic toxicity of the product while maintaining its efficacy of function. This paper covers some basic aspects of greener and safer chemical synthesis.
8 illus, 1 table, 11 ref
Varma I K;Lochab B;Bijwe J
015559 Varma I K;Lochab B;Bijwe J (Centre for Polymer Science and Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi-110 016, Email: ikvarma@hotmail.com) : High performance, high temperature polymers: recent developments. Indian chem Engr 2009, 51(Spl), 98-113.
3 tables, 35 ref
Valantina S R;Neelamegham;Gayathri K
015558 Valantina S R;Neelamegham;Gayathri K (Physics Dep, SASTRA Univ, Thanjavur-613 402, Email: rvalantina@gmail.com ) : Antioxidant stability of edible oil using rheological behaviour and in vitro analysis. Asian J Chem 2009, 21(6), 4325-32.
Theological behaviour and thermal degradation are the important parameters required to determine the quality and stability of food system. In this paper, the Theological behaviour and thermal degradation of sunflower oil and palm oil. is investigated. The Newtonian behaviour of the oils are studied from the kinematic viscosity of unused edible oils (sunflower oil, palm oil, groundnut oil, coconut oil, olive oil, sesame oil) using redwood viscometer at temperatures from 30 to 90 °C. Increase in viscosity of used (heated to frying condition, 210 °C) edible oils like sunflower oil, palm oil are studied in the same variation of temperature shows the non-Newtonian behavoiur of the oils. This oxidation process can be prevented or retarded by the addition of synthetic or natural antioxidants. The antioxidant activities in oils on heating to smoke point are analyzed using in vitro studies. The free radical scavenging activity of the samples using ABTSH and DPPH is measured and the antioxidant activity of sunflower oil is much effective than palm oil.
8 illus, 3 tables, 21 ref
Singh S
015557 Singh S (Industrial Chemistry Dep, Institute of Science and Teconology for Advanced Studies and Research, Vallabh, Vidyanagar, Gujarat-388 120) : Chemical refining and its effect on colour of the vegetable oil. Prajna 2009, 17(Dec), 91-3.
Crude cottonseed oil is one of the dark colour fatty oil of oleic-linoleic group used for edible purposes in India. In the present investigation it has been tried to "refine it chemically by alkali (sodium hydroxide) and study its effect on the reduction in colour of the oil. The experiments were carried out by varying the excess amount of alkali and its concentration to remove the free fatty acids present in the oil. The acid value of refined oil changes by using higher amount of excess alkali but proportionally increasing oil loss and resulting poor yield of refined oil. It was concluded that the optimum level of excess amount of alkali was 12% at 15% concentration (w/v) in order to reduce the colour value.
6 tables, 9 ref
Singh A;Tatewar D;Pandharipande S L;Shastri P N
015556 Singh A;Tatewar D;Pandharipande S L;Shastri P N (Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur Univ, Nagpur, Email: pnslit@yahoo.com) : Validity of artificial neural network for predicting effect of media components on enzyme production by A. niger in solid sate fermentation. Asian J Microbiol Biotechnol envir Sci 2009, 11(4), 777-82.
Solid state fermentation involves treatment of biodegradable solid substrate with microorganisms, and is characterized by the presence of limited moisture, sufficient to solubilise the nutrients, but avoid leaching. Water activity (aw) is maintained around 0.85, and is specially suitable for production of extracellular enzymes and metabolites by molds. It is widely utilized for biotransformation of agricultural waste for recovery of industrial enzymes, organic solvents and other biochemicals. On account of difference in water binding capacity of different substrates, optimum moisture level needs to be established for various combination of substrates, which involves extensive laborious experimental work. Present investigations were carried out to study the application of Artificial Neural Network as a tool for predicting cellulase and xylanase production by Aspergillus niger as a function of bagasse content and moisture level incorporation in basic wheat bran medium. A correlation coefficient > 0.8 and root mean square error < 0.2 indicates ANN as a good prediction tool for complex biological process.
3 illus, 4 tables, 22 ref
Shroff R
015555 Shroff R (NO, United Phosphorus Ltd., Uniphos House, Opposite Madhu Park, 11th Road, Khar (West), Mumbai-400 052, Email: shroffrd@uniphos.com) : Agrochemical industry in India: past, present and future. Indian chem Engr 2009, 51(Spl), 147-50.
At a time when much of the global economy is falling apart and demand is collapsing, both for consumer goods and the industries that make them, the world of agrochernicals is holding up remarkably well. However, this does not mean that the agrochernicals industry is not going through challenging times. The strategy for the Indian Agrochemical Industry to deal with globalisation and increasing competitiveness is very simple. All we need is to remove unnecessary hurdles and give support to R&D in India. The agrochernicals industry has been responsible for minimising losses and improving productivity in agriculture. In India, we have unlimited scientific talent, good agronomists and farmers who are willing to learn. Together, we can usher in a "New Green Revolution". No amount of industrial production will remove poverty and hunger in India. The Indian economy can certainly grow in the world with higher agricultural production.
Shendurse A M;Arora S;Patil M R;Gawande H M; Khedkar C D
015554 Shendurse A M;Arora S;Patil M R;Gawande H M; Khedkar C D (NO, College of Dairy Technology, Pusad, Maharashtra, Email: amshendurse@gmail.com) : Low calorie whey beverages. Indian Dairyman 2009, 61(7), 52-8.
49 ref
Ravindra Kumar;Sharma R K;Barman K
015553 Ravindra Kumar;Sharma R K;Barman K (Animal Nutrition Div, Faculty of Veterniary Sciences and Animal Husban, Sher-e-Kashmir Univ of Agricultural Sciences and Technology, Jammu, R.S. Pura-181 102, Email: ravindra.srivastava@gmail.com) : Increasing CLAS in milk for health. Indian Dairyman 2009, 61(8), 38-42.
19 ref
Rai P;De S
015552 Rai P;De S (Agricultural Engineering Dep, Birsa Agriculture Univ, Kanke, Ranchi-834 006, Email: sde@che.iitkgp.ernet.in) : Clarification of pectin-containing juice using ultrafiltration. Curr Sci 2009, 96(10), 1361-71.
Membrane-based processes arc emerging as significant unit operations for clarification of fruit juice in the food industry. In this article, pretreatmcnt of pectin-rich juice, its clarification using ultrafiltration and storage study of the filtered juice are discussed. Mosambi (Citrus sinensis (L.) Osbeck) juice is considered as a case study. Optimum conditions for enzymatic treatment for depectinization are reported. Efficacy of enzymatic treatment is explored compared to other pretreatment methods. Selection of a suitable membrane, performance of clarification, quantification of flux decline and methods to improve the permeate flux are also discussed. Finally, the effects of various parameters on the shelf-life of the clarified juice are presented. After depectinization, the leftover pectin present in the juice causes flux decline during ultrafiltration. Higher pore-sized membranes may not lead to higher permeate flux during ultrafiltration because the filtration is mainly gel layer-controlled. Apart from conventional methods for membrane cleaning like backflusing, application of external electric field may improve the ultrafiltration flux due to the charged nature of pectin at its natural pH. Clarified juice has adequate shelf-life without addition of any external preservative or heat treatment.
6 illus, 2 tables, 63 ref
Olaofe O;Ekuagbere A O;Ogunlade I
015551 Olaofe O;Ekuagbere A O;Ogunlade I (Food Science and Technology Dep, Federal Univ of Technology, Akure, Nigeria, Email: cscngr@yahoo.com) : Chemical, amino acid composition and functional properties of calabash seed's kernel. Bull pure appl Sci-Sect C 2009, 28(1-2), 13-24.
The chemical composition and functional properties of calabash seed's kernel were carried out using standard analytical methods. Results show that the calabash seed kernels contained high amount of crude protein (35.9%) and fat (43.2%). It also contained moderately high amounts of magnesium, sodium, potassium and manganese. Phosphorus was present in high amounts making it a potential source of food supplements. The most abundant amino acids present are glutamic acid (147.0mg/g protein) and aspartic acid (95.8mg/g protein). The essential amino acids in the kernel amount to 43.4% indicating that the kernel is nutritionally useful for both school children and adults. The calabash kernel protein has minimum solubility at pH 5.0. The results of functional properties of the calabash seed flour showed that water absorption capacity was 156.7%, oil absorption capacity 93.3% with least gelation concentration of 7.0%. The emulsion capacity, foaming capacity and stability were relatively good, suggesting that the calabash seed kernel can be utilized for both domestic and industrial purposes.
6 tables, 38 ref
Nanoti S M;Garg M O
015550 Nanoti S M;Garg M O (Indian Institute of Petroleum, Council of Scientific and Industrial Research, Dehradun, Uttarakhand-248 005, Email: director@iip.res.in) : Petroleum refining industry: technological challenges and opprotunities. Indian chem Engr 2009, 51(Spl), 165-73.
The current hydrocarbon value chain, from oil exploration, production refining to marketing, has become a highly integrated process and is being increasingly expected to deliver fuels at reasonable cost to drive economies. The Indian refining industry is currently faced with several challenges and, undoubtedly, is expected to face unprecedented challenges in the future. Nonetheless, it contributes a significant portion to the GDP of the nation. The challenges, which the industry is currently facing and is likely to face, include unstable crude prices, significant price differential between light and heavy crudes, shifting product demands, reducing fuel oil uptake etc. Also, there is a moving target for purity of petroleum products and the need to synergistically utilise other energy sources, particularly, bioresources. The future refineries would have to be necessarily smart in terms of understanding these challenges and to be able to adapt their designs and operations to take advantage of the same. For example, high conversion processes would be needed to take advantage of low price of heavy crudes, maximise energy efficiency, minimise the carbon dioxide (CO2) footprint and, thus, encourage use of hydrogen free technologies. There is also a need to synergistically integrate current operations with petrochemical production while allowing for the high volatility of this market. Lastly, in any refining operation, there are several byproduct streams, which are considered to be of low value. These streams need to be looked at for value addition as they can bring significant impact to the refinery bottom line. This paper shall attempt to outline some of the major issues mentioned above and can act as a roadmap for the refiners.
7 illus, 3 tables
Nagehan Ucan H;Dursun S;Gur K;Aktumsek A
015549 Nagehan Ucan H;Dursun S;Gur K;Aktumsek A (Engineering and Architecture Faculty, Selcuk Univ, 42003 Konya, Turkey, Email: nagehanucan@selcuk.edu.tr) : Organochlorine pesticide residue analysis in some fruit samples collected from Konya city supermarkets. Asian J Chem 2009, 21(6), 4843-55.
Food demand increased with increasing population on the world and this demand required usage of fertilizers and pesticides in agriculture. Extremely and uncontrolled usage of pesticide give numbers of problem on vegetation and human health. In this study, the existence of organochlorine pesticide residues have been investigated in 18 types of fruit specimens consumed in Konya, Turkey. The numbers of investigated residues of organochlorine pesticides were 24. The examined fruit specimens for analysis of pesticide residues were apple, pear, black grape, plum, quince, carrot, white grape, persimmon, orange, pomegranate, banana, tangerine, pumpkin, grapefruit, strawberry, kiwi, jarusalem artichoke and medlar. As a result, it was found that, the levels of orghanochlorine pesticides in the all investigated furit specimens were lower than those of the MRL of European Legislations.
1 illus, 4 tables, 27 ref
Koyuncu N;Uylaser V
015548 Koyuncu N;Uylaser V (Food Engineering Dep, Agriculture Faculty, Uludag Univ, 16059 Gorukle-Bursa, Turkey, Email: uylaserv@uludag.edu.tr) : Benzoic acid and sorbic acid levels in some dairy products consumed in Turkey. Asian J Chem 2009, 21(6), 4901-8.
In this study, white cheese, kashar cheese, yogurt, ayran, mayonnaise and margarine samples of different brands were analyzed for benzoic and sorbic acid levels. They were obtained from retail outlets in Bursa, Turkey. The occurrence and concentration level of benzoic acid and sorbic acid in the samples were investigated using high performance liquid chromatography (HPLC) with diode-array detector (235-254 nm). Chromatographic separation was achieved with a CIS column and acetate buffer (pH 4.74)-methanol mixture (70:30) as a mobile phase. The levels of benzoic acid and sorbic acid in the analyzed samples were in the range of not detected to 466 mg/kg or L and 2.09 to 1133 mg/kg or L, respectively. In 80 and 40% of the analyzed yogurt samples, 100 and 20% of the analyzed ayran samples, 80% of the analyzed white and kashar cheese samples established benzoic acid and sorbic acid, respectively, although not permitted by the Turkish Food Codex. Benzoic acid and sorbic acid levels in the other samples were determined in the maximum tolerable limit of the Turkish Food Codex.
4 illus, 1 table, 30 ref
Joshi A
015547 Joshi A (NO, , Technical Manager, Asian Paints Ltd., Asian Paints House, 6A, Shantinagar, Santa Cruz (East), Mumbai-400 055, Email: amit.joshi@asianpaints.com) : High performance pigments. Indian chem Engr 2009, 51(Spl), 129-43.
17 illus, 3 tables, 7 ref
Jindel N;Sharma L;patel M;Ghoksi M;Johan N
015546 Jindel N;Sharma L;patel M;Ghoksi M;Johan N (Plastics Technoloty, Institute of Scinces and Technology for Advanced studies and Research, allabh Vidyanagar, Gujrat - 388 120) : Recycling of food grade plastics packaging films for various applications. Prajna 2009, 17(Dec), 79-85.
Food grade plastics films were recycled effectively and efficiently by simple and economical methods. Different routes were followed and a comparative study was conducted. The plastics films were blended with virgin plastics and formulated with different additives to make them more polar and reactive. The mixing of plastics films with, virgin plastics and other additives were performed on two roll mill and specimens were prepared on different processing machines like film extrusion, injection moulding, compression moulding etc. The major areas were the recycled compounds used are injection moulding, extrusion, until adhesion etc.
3 illua, 4 tables, 15 ref
Eshratabadi P;Salarvand Z;Rashidi L
015545 Eshratabadi P;Salarvand Z;Rashidi L (Food and Agriculture Dep, Institute of Standard (Isiri), P.O. Box 31585-163, Email: eshratabadi-pr@isiri.org.ir) : Antioxidant effect of phospholipids extracted from soyabean on fat and food oil. Asian J Chem 2009, 21(6), 4889-93.
Nowdays, phospholipids are considered as a natural additive with useful and applicable effects in food industry and many studies are being carried out on this field. In this study the antioxidant effect of phospholipids extracted from 5 different soyabean varieties, named Persia (SR), Hill (HL), Williams (WZ), Gorgan 3 (GN) and Simes (SS) have been compared in soyabean oil as well as that on the stability of sunflower oil. Crude and degummed soyabean oils of all 5 varieties as well as refined sunflower seed oils with added phospholipids were subjected to induction period (IP) measurements employing Rancimat method. The results from the first step showed that Williams variety has markedly different behaviour of antioxidant in comparison with the others. Comparing the data from second step, it is concluded that Simes variety increase stability of sunflower oil more than the others.
3 tables, 13 ref
Cilingir A C;Ucar V;Udofia I J;Jin Z M
015544 Cilingir A C;Ucar V;Udofia I J;Jin Z M (School of Mechanical Engineering, Esentepe Campus, Sakarya Univ, 54187, Sakarya, Turkey, Email: cilingir@sakarya.edu.tr) : Biphasic finite element modelling of contact mechanics of hemi-arthroplasty of human hip joint. part II: polycarbonate urethane on cartilage contact. Trends Biomater artif Organ 2008, 22(2), 65-72.
Poroelastic finite element study was performed to compare the contact mechanics of employing different biomaterials such as metal and polycarbonate urethane for hemiarthroplasty hip resurfacing. The effects of loading, radial clearance and cartilage thickness on the predicted maximum contact pressure and pore pressure were investigated in this study. The femoral component, considered in part 1, was modified on the bearing surface by using a polycarbonate urethane layer with thickness of 2 mm to investigate the effect of soft bearing material against the articular cartilage. The stress distributions within the components of hemiarthroplasty of hip joint were also studied. The most significant effect on the predicted maximum contact pressure and pore pressure for metal on cartilage and polycarbonate urethane on cartilage models was found to be cartilage thickness in this study. Therefore it was concluded that because of cartilage degeneration by time, using soft femoral component decreased the predicted maximum contact pressure and pore pressure on cartilage in this study. Varying the radial clearance between femoral component and articular cartilage and applied load did not show a significant effect on the contact mechanics between metal on cartilage and polycarbonate urethane on cartilage models. Also a comparison of the predicted maximum von Mises stresses within the components of metal on cartilage and polycarbonate urethane on cartilage models had only small differences, ranged from 0 to 10%.
6 illus, 2 tables, 42 ref
Ahmad A;Sahoo D;Ahmad J;Tandon S
015543 Ahmad A;Sahoo D;Ahmad J;Tandon S (NO, Central Institute of Medical and Artomatic Plants, P.O. CIMAP, Lucknow-226 015, Email: s.tandon@cimap.res.in) : GC-MS composition of rose oil (Rosa damascena) of different agro climatic refions of North India. Asian J Chem 2009, 21(6), 4643-7.
The essential oil composition of rose oil (Rosa damascena) obtained from different agro climatic region of north India has been evaluated by GC, GC-MS and relative retention time in the oils. The rose oil have been distilled from the different regions of Pantnagar, Lucknow, Moradabad and Kashmir. The major components of rose oil mainly citronellol, nerol, geraniol, nonadecane and heneicosane have been identified. A total of 32 components amounting to 93.1, 88.79, 88.37 and 95.47% of rose oils of Pantnagar, Lucknow, Moradabad and Kashmir, respectively have been identified.
1 table, 15 ref
Yadav G D
015560 Yadav G D (Chemical Technology Dep, (UDCT), Matunga, Mumbai-400 019, Email: gdyadav@yahoo.com) : Green chemistry and engineering in the design of safer, beign and efficatious chemicals for agro, pharmaceuticals and dyestuff industries. Indian chem Engr 2009, 51(Spl), 78-97.
The manufacturing of agro, dyestuff, pharma and other speciality chemicals not only produces a lot of waste reducing the atom economy but the toxicology of these chemicals is also a cause of concern. They have indeed given a bad name to the chemical industry. However, fundamental analysis of toxicology of the molecule will be helpful in creating totally benign alternate molecules, which are as efficacious as their original function. Design of safer chemicals invokes the use of molecular structural design and consideration of the principles of toxicity and mechanism of action to minimise the intrinsic toxicity of the product while maintaining its efficacy of function. This paper covers some basic aspects of greener and safer chemical synthesis.
8 illus, 1 table, 11 ref
Varma I K;Lochab B;Bijwe J
015559 Varma I K;Lochab B;Bijwe J (Centre for Polymer Science and Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi-110 016, Email: ikvarma@hotmail.com) : High performance, high temperature polymers: recent developments. Indian chem Engr 2009, 51(Spl), 98-113.
3 tables, 35 ref
Valantina S R;Neelamegham;Gayathri K
015558 Valantina S R;Neelamegham;Gayathri K (Physics Dep, SASTRA Univ, Thanjavur-613 402, Email: rvalantina@gmail.com ) : Antioxidant stability of edible oil using rheological behaviour and in vitro analysis. Asian J Chem 2009, 21(6), 4325-32.
Theological behaviour and thermal degradation are the important parameters required to determine the quality and stability of food system. In this paper, the Theological behaviour and thermal degradation of sunflower oil and palm oil. is investigated. The Newtonian behaviour of the oils are studied from the kinematic viscosity of unused edible oils (sunflower oil, palm oil, groundnut oil, coconut oil, olive oil, sesame oil) using redwood viscometer at temperatures from 30 to 90 °C. Increase in viscosity of used (heated to frying condition, 210 °C) edible oils like sunflower oil, palm oil are studied in the same variation of temperature shows the non-Newtonian behavoiur of the oils. This oxidation process can be prevented or retarded by the addition of synthetic or natural antioxidants. The antioxidant activities in oils on heating to smoke point are analyzed using in vitro studies. The free radical scavenging activity of the samples using ABTSH and DPPH is measured and the antioxidant activity of sunflower oil is much effective than palm oil.
8 illus, 3 tables, 21 ref
Singh S
015557 Singh S (Industrial Chemistry Dep, Institute of Science and Teconology for Advanced Studies and Research, Vallabh, Vidyanagar, Gujarat-388 120) : Chemical refining and its effect on colour of the vegetable oil. Prajna 2009, 17(Dec), 91-3.
Crude cottonseed oil is one of the dark colour fatty oil of oleic-linoleic group used for edible purposes in India. In the present investigation it has been tried to "refine it chemically by alkali (sodium hydroxide) and study its effect on the reduction in colour of the oil. The experiments were carried out by varying the excess amount of alkali and its concentration to remove the free fatty acids present in the oil. The acid value of refined oil changes by using higher amount of excess alkali but proportionally increasing oil loss and resulting poor yield of refined oil. It was concluded that the optimum level of excess amount of alkali was 12% at 15% concentration (w/v) in order to reduce the colour value.
6 tables, 9 ref
Singh A;Tatewar D;Pandharipande S L;Shastri P N
015556 Singh A;Tatewar D;Pandharipande S L;Shastri P N (Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur Univ, Nagpur, Email: pnslit@yahoo.com) : Validity of artificial neural network for predicting effect of media components on enzyme production by A. niger in solid sate fermentation. Asian J Microbiol Biotechnol envir Sci 2009, 11(4), 777-82.
Solid state fermentation involves treatment of biodegradable solid substrate with microorganisms, and is characterized by the presence of limited moisture, sufficient to solubilise the nutrients, but avoid leaching. Water activity (aw) is maintained around 0.85, and is specially suitable for production of extracellular enzymes and metabolites by molds. It is widely utilized for biotransformation of agricultural waste for recovery of industrial enzymes, organic solvents and other biochemicals. On account of difference in water binding capacity of different substrates, optimum moisture level needs to be established for various combination of substrates, which involves extensive laborious experimental work. Present investigations were carried out to study the application of Artificial Neural Network as a tool for predicting cellulase and xylanase production by Aspergillus niger as a function of bagasse content and moisture level incorporation in basic wheat bran medium. A correlation coefficient > 0.8 and root mean square error < 0.2 indicates ANN as a good prediction tool for complex biological process.
3 illus, 4 tables, 22 ref