Papers

Coir fiber reinforced polypropylene (CFRP) and Coir-Glass reinforced polypropylene (CGRP) was fabricated using a proprietary hot press designed for the purpose. By incorporating up to 20% (by weight) glass fiber, the tensile modulus is increased by 12.5%, and the tensile strength is increased by 7% compared to those of CFRP. Sorption behaviour and effects of environmental aging on tensile properties on both CFRP and CGRP systems were studied by immersing samples in water for up to 1200 hrs at 27 ^oC. Compared to CFRP, a 4% drop in saturated moisture level is seen in CGRP. After aging in water for 1200 hrs, reduction in tensile strength and modulus for CFRP is nearly two times less then that of CGRP. It is shown that the durability of coir fiber reinforced polypropylene can enhance by introducing a small amount of glass fibers.
 

Indium Antimonide (InSb) compound semiconductor were grown under vacuum 10^-5 torr in vacuum coating unit using Indium (99.999 %) and Antimony (99.999 %) metal powder as a source materials with various composition using formula In_1-xSb_x (where x is variable having value 0.2 to 0.4) for preparation of ten compound semiconductors. Each compound semiconductor was prepared by heating from 373 K to 473 K, for 5 hours, and this process was repeated five times. X-ray diffraction studies of ten samples to confirm the polycrystallinity of compound semiconductor and these samples show preferential orientation along the (111), (220), (311),(422) and (400) planes. The grain size (D), Dislocation density (ä) and lattice parameter (a) of compound semiconductor were evaluated with XRD data. The grain size increased from 3.4 A^o to 6.5 A^o with increasing of boat temperature from 373 K to 473 K, and Dislocation density were decreased with increase of temperature.
 

The use of chicken bone powder as filler in flexible polyether foam has been studied. Foam recipes were incorporated with 0%, 5%, 10%, 15%, 20% and 25% chicken bone powder and the foam samples formed were analyzed; the results obtained were compared with 10% CaCO₃ as used in foam industries. The physico-mechanical properties of the foam samples produced were enhanced, 10% of the chicken bone as filler is comparable with 10% CaCO₃. Analysis of the bone gave the following cations in descending order of concentration Ca²⁺, Mg²⁺, K⁺, Na⁺, Zn²⁺, Mn²⁺ and Cu²⁺ while the concentration of CO₃^2- was higher than PO₄^3-.
 

Studies on the determination of Critical Micelle Concentration (CMC), of mixed surfactants were carried out at 30°C for hexadecyltrimethylammonium bromide (HTAB) and polyoxyethylene sorbitan monolaurate (Tween 20)/1-Hexanol/water. The phase diagram, CMC value and the ideality of mixed surfactant were determined and the result indicated a composition of 0.2 to 1.0 fraction of water is the best area for normal micelle region for HTAB and 0.3 to 1.0 fraction of water for Tween 20 with curving upward the 1-hexanol apex maximum solubility of 1-hexanol. From the fluorescence method, the CMC value for pure T20 is 1.6293 x10^-3 M. While for CMC₁ and CMC₂ value for pure HTAB is CMC₁:5.4877 x10^-3 M and CMC₂:1.0975 x10^-2 M. Then, CMC value for mixed surfactant system at mole ratio 0.2: 0.8 (T20: HTAB) is 2.358 x10^-3 M.
 

Effect of Chlorpyrifos an organophosphate insecticide on the glycogen and protein in liver and kidney of Gambusia affinis exhibited notable alterations. Liver and Kidney being the main site of metabolic activity in body and highly active in both toxifying and detoxifying insecticides, was selected for the study purpose. Sublethal dose for 96-hrs 0.028 ppm of chlorpyrifos was calculated by probit method. The minimum effective dose 10%, 20% and 30% was given to the fish for 15 days. Chlorpyrifos insecticide caused significant decrease in glycogen and protein contents in the liver and kidney of treated fish. This depletion is due to depression of glucokinase activity resulting in the reduction of glucose 6-phosphate. The reduction in protein content may be due to increased utilization of protein to meet out the energy demand when the fish is under stress condition. This may be related to regressive phenomenon with in the cells. It was observed that Chlorpyrifos disturb the chemical constituents of the fish which leads to cell damages and finally mortality of fish.
 

The objective of this study is the treatment of municipal solid waste-"leachate" by using waste tea leaves as an adsorbent. In recent years, the need for safe and economical methods for elimination of heavy metals from leachate has necessitated research interest towards the production of low cost alternatives. Therefore, there is an urgent need that all possible sources of low cost inexpensive adsorbents should be explored and its feasibility for the removal of heavy metals should be studied in detail. In the present studies, the waste tea leaves, as a low cost adsorbent for the treatment of leachate, which are highly effective in removing the heavy metals was investigated. Leachate was collected from wariyana village, Kapurthala road, Jalandhar. An effort has been made to give a brief idea of an approach to wastewater treatment, particularly discussing and highlighting the low-cost alternative adsorbents with a view to utilize these waste/low-cost materials.
 

This paper reports study of magnetic susceptibility of rare-earth nickelates of the type RNiO₃ where R = Pr and Nd. Molar magnetic susceptibility () measurement have been done on powdered sample in the temperature range 300-1000K. At higher temperature, studied materials exhibit Curie-Weiss law with negative value of paramagnetic Curie temperature indicating antiferromagnetic ordering at lower temperature.
 

The infrared spectra of methyl substituted aromatic hydrocarbon with aniline have been obtained in the 3400-1670 cm^-1 region. The many researches on the effects of hydrogen bonding on the vibrations of hydroxyl groups have provided information from which the environment of hydroxyl groups in molecules can be deduced. Factors influencing infrared absorption of aromatic aldehyde groups have not yet been so fully explored. This paper presents information obtained from an examination of these groups in Ccl₄ solution.
 

in hard rock terrain, identification of groundwater potential is targeted in the weathered, fractured, fissured zones, etc. Electrical resistivity survey method is useful to delineate the weathered zone and its thickness. An attempt has been made to delineate the subsurface weathered zone and fracture pattern by using geoelectrical resistivity method. The chosen study area Lakkur sub basin falls in Mangalur block, Cuddalore district, Tamil Nadu. The basin consist charnockite and charnockitic gneiss rocks. Electrical resistivity profiling and vertical electrical soundings have been conducted at every 2 km interval in a grid pattern. Totally 36 VES were conducted and six profiles were carried out. The profile traverse is in N-S direction and the profile interval is 2 km. The resistivity data have been qualitatively and quantitatively analysed. A low resistivity anomaly at VES. 21 (Alambadi) has been observed in all the profiles and contour maps indicating a weaker and weathered zone. The qualitative approach is very essential before going in for quantitative approach.
 

Milk proteins act against different enzymes degenerated in peptides with different composition. Milk peptides beside opioid-like activities, also have possessive angiotenzin converting enzymatic (ACE) inhibitory activity since impeach with mineral, antithrombotic properties, antimicrobial and immune modulator activity. ACE inhibitory peptides removed from milk proteins, as IPP (izoleucin prolin prolin) and VPP (vazoleucin prolin prolin), are significance from that present ACE inhibitory in drugs. For example IC₅₀ (Inhibitory Concentration 50%) at kaptopril is on nine mol range, until value of IC₅₀ from IPP and VPP is on thousand times enhanced. Structures in artificial ACE inhibitory drugs (lizinopril, kaptopril and enalapril) have more similarity with structure of C- terminal part per peptide removed by proteins in milk.  Major factor per ACE inhibitory activity is their small molecule mass at ACE inhibitory peptides. Mention also that advanced proceeding for used in vitro ACE inhibitory capable on peptides there is not default. Amount ACE used in proceeding as type at ACE substrate are important in calculation of IC₅₀ value (concentration at peptides requirement decrease at ACE activity 50%). Method used substrate N-[3-(2-furil)-acrylic]-L-fenilalanil-glicil-glicin (FAPGG) obtained from company Sigma No 7131.Determination are based on various absorbances on furanakriloil stooped three peptide FAPGG and products of enzyme accelerate hydrolyzes FAP at wave length 340 nm. Gly-Gly do not absorb light at this condition. Because products of hydrolyses FAP absorption per less at 340 nm results vary and absorbance is negative. Cardiovascular system effect of peptides derived from milk proteins are not very significant but with other components in milk has shown that they have opportunistic effect on blood pressure. Results for determination of ACE inhibitory activity of peptides in 40 samples on patients who received fermented milk products are given in the paper. There is little number to verify reality role of antihypertensive peptides upon decrease in blood pressure but is good indicator to have influence and people's health problems solution with consummate respective nutrition. In this study examination the amount of Ace inhibitory peptides on fermented products, is significant on arterial blood pressure.