Showing papers by "Bharathiar University published in 1995"
TL;DR: In this paper, the ability of waste biogas residual slurry (BRS) to remove Cr (VI) from aqueous solutions was investigated and the influence of various parameters such as metal ion concentration, contact time, adsorbent dosage, adorbent particle size, temperature and pH was studied.
298 citations
TL;DR: In this article, the effect of initial metal ion concentration, agitation time, temperature and pH on Cd(II) adsorption by waste Fe(III) Cr(III), hydroxide was investigated in batch mode studies.
293 citations
TL;DR: In this article, the rate of adsorption of Direct red 12 B, a direct dye, on biogas residual slurry (BRS) has been studied, and the parameters studied include dye concentration, particle size, temperature and pH.
185 citations
TL;DR: In this paper, the authors used activated carbon prepared from peanut hulls (PHC), an agricultural waste byproduct, for the adsorption of Ni(II) from aqueous solution.
184 citations
TL;DR: In this paper, a series of CdO thin films have been prepared by spray pyrolytic technique at different substrate temperatures and X-ray diffraction scans confirmed the polycrystalline structure of the films.
70 citations
TL;DR: Of all the different water and hydrothermal treatments studied autoclaving seemed to be the most efficient method in improving IVPD and eliminating the antinutrients investigated except phytic acid.
Abstract: Effects of soaking, cooking and autoclaving on changes in polyphenols, phytohaemagglutinating activity, phytic acid, hydrogen cyanide (HCN), oligosaccharides and in vitro protein digestibility were investigated in seeds ofDolichos lablab var.vulgaris. Both distilled water and NaHCO3 solution soaking and autoclaving significantly reduced the contents of total free phenolics (85–88%) compared to raw seeds. Autoclaving (45 min) reduced the content of tannins by upto 72%. Soaking seemed to have limited effect in eliminating phytohaemagglutinating activity, whereas autoclaving (45 min) seemed to eliminate the haemagglutinating activity completely. The reduction in content of phytic acid was found to be some what greater in distilled water soaking (28%) compared to NaHCO3 solution soaking (22%). Only a limited loss in content of phytic acid was observed under cooking as well as autoclaving. Loss of HCN was greater under autoclaving (87%) compared to the other processes studied. Of the three sugars analysed, soaking reduced the level of verbascose more than that of stachyose and raffinose. Autoclaving reduced the content of oligosaccharides more efficiently (67–86%) than ordinary cooking (53–76%). Autoclaving improved the in vitro protein digestibility (IVPD) significantly (13%). Of all the different water and hydrothermal treatments studied autoclaving seemed to be the most efficient method in improving IVPD and eliminating the antinutrients investigated except phytic acid.
65 citations
TL;DR: The investigated seeds were rich in minerals such as Na, P, Mg, Zn and Fe and Antinutritional substances, total free phenols, tannins, L-DOPA and haemagglutinating activity, were also analysed/assayed.
62 citations
TL;DR: In this paper, sufficient conditions for controllability of nonlinear integrodifferential systems in a Banach space were established using the Schauder fixed-point theorem, and the results were obtained using the fixed point theorem.
Abstract: Sufficient conditions for controllability of nonlinear integrodifferential systems in a Banach space are established. The results are obtained using the Schauder fixed-point theorem.
54 citations
TL;DR: Carbon prepared from peanut hulls (PHC) has been used for the adsorption of Pb(II) over a range of initial metal ion concentrations (10−20 mg/L), agitation times (5−140 minutes), adsorbent dosages (5 −100 mg/100 mL), and pH values (1.5−10.0) as mentioned in this paper.
Abstract: Carbon prepared from peanut hulls (PHC) has been used for the adsorption of Pb(II) over a range of initial metal ion concentrations (10–20 mg/L), agitation times (5–140 minutes), adsorbent dosages (5–100 mg/100 mL), and pH values (1.5–10.0). Adsorption of Pb(II) obeyed the Langmuir isotherm. The applicability of the Lagergren kinetic model has also been investigated. Quantitative removal of 20 mg/L Pb(II) by 0.3 g carbon per liter aqueous solution was observed in the pH range of 3.0 to 10.0. A comparative study with a coal-based commercial granular activated carbon (CAC) showed that the adsorption capacity of PHC was 18 times larger than that of CAC.
52 citations
TL;DR: In this article, the authors used waste biogas residual slurry (BRS) for the adsorption of Pb(II) from aqueous solution, over a range of initial metal ion concentrations (20−100 mg litre−1), agitation times (5−70 min), adsorbent doses (0·4−5·0 g litre −1) and initial pH values (1·5−6·0).
52 citations
TL;DR: In this paper, a controlled reaction was employed between orthophosphoric acid and lead nitrate solution by the slow diffusion process in the gel medium, and the laser Raman and FT-IR spectra of the lead-nitrate phosphate crystal were recorded.
TL;DR: The essential amino acids, except methionine and cystine, were present in adequate levels in total proteins and protein fractions of C. laevigata and T. indicata; however, threonine and tryptophan were limiting.
TL;DR: Multiple antibiotic resistance indexing of the strains showed that more than 95% originated from high risk sources of contamination such as poultry, swine, cattle and human environments where antibiotics are often used.
Abstract: A total of 240 Salmonella strains, 158 from 730 fish samples and 82 from 276 crustacean samples, obtained during a 2 year period, were examined for resistance to 10 antibiotics. More than 90% of the strains were resistant to bacitracin, penicillin and novobiocin. The least resistance was observed to chloramphenicol (6.7%) and nalidixic acid (12%). Multiple antibiotic resistance indexing of the strains showed that more than 95% originated from high risk sources of contamination such as poultry, swine, cattle and human environments where antibiotics are often used.
TL;DR: The nutrient composition and antinutritional factors of two Indian tribal pulses, Indigofera linifolia and Sesbania bispinosa, were determined and contained adequate levels of all the essential amino acids except sulpho-amino acids in total seed proteins and globulin fraction.
Abstract: The nutrient composition and antinutritional factors of two Indian tribal pulses, Indigofera linifolia (Lf)Retz and Sesbania bispinosa (Jacq) WF Wight, were determined The mature seeds contained 2966–3212 g kg−1 crude protein, 472–642 g kg−1 crude lipid, 567–72 g kg−1 crude fiber, 276–319 g kg−1 ash and 5313–5506 g kg−1 carbohydrates The seeds of Indigofera linifolia were rich in K, Ca, Mn and Cu, whereas Sesbania bispinosa were rich in P and Zn While albumins and globulins constituted the major proportion of seed proteins in Indigofera linifolia, globulins and glutelins formed the major bulk of seed proteins in Sesbania bispinosa Seed lipids of both legumes contained a large proportion of unsaturated fatty acids with linoleic acid as the predominant one These two pulses contained adequate levels of all the essential amino acids except sulpho-amino acids in total seed proteins and globulin fraction of Sesbania bispinosa The in vitro protein digestibility of the raw seeds of Indigofera
TL;DR: In this article, polyvinyl alcohol (PVA) films (pure, 0.5% and 2% iodine doped) are formed onto well cleaned glass slides by a solution growth technique.
TL;DR: In this paper, the optical recording characteristics of Sb2Se3 films were systematically studied based on the amorphous-crystalline phase transformations and the effects of power, power density and time of laser irradiation, scanning speed and thickness of the films on percentage change in transmittance.
TL;DR: Several hydrazinium (1 +) and dicarboxylates of aliphatic and aromatic carboxylic acids have been prepared by neutralisation of these acids with hydrazine hydrate in aqueous medium as discussed by the authors.
TL;DR: Some nutritional and antinutritional characteristics of Xylia xylocarpa seeds were studied in this paper, showing that the seeds appeared to be a good source of potassium, magnesium, phosphorus and iron.
TL;DR: The effects of formaldehyde fumigation and pesticide drenching with Bavistin, Cuman, Copperthom, Sulfex, Furadon, and Termix at recommended rates on vesicular-arbuscular mycorrhizal (VAM) colonisation and Rhizobium sp.
Abstract: The effects of formaldehyde fumigation and pesticide drenching with Bavistin, Cuman, Copperthom, Sulfex, Furadon, and Termix at recommended rates on vesicular-arbuscular mycorrhizal (VAM) colonisation and Rhizobium sp. nodules were assessed regularly for a period of 90 days in the legumes Cajanus cajan, Dolichos biflorus, Vigna mungo, and V. unguiculata under field conditions. The fumigant and the pesticides initially reduced VAM fungal colonisation and the number of spores in all plants. Following the initial decrease there was a slow recovery, but by 90 days after emergence, root colonisation was either parallel to or still lower than the control, and the number of spores was still well below control levels for all species except C. cajan, which had more VAM spores than the control in all treatments except fumigation and Furadon. Although the number of nodules did not differ from control levels at 30 days after emergence, differences were evident during the later stages of plant growth for all species except V. unguiculata. The effect of pesticides on VAM fungi and root nodulation varied with the associated host plant species. Plant tissue P and VAM colonisation were significantly correlated in all host plants. The pesticide treatments had no marked effect on plant growth, but accumulations of nutrients in pesticide-treated plants were lower than those in untreated plants. Growth and nutrient status of the legumes varied with VAM fungal colonisation.
TL;DR: In this article, sufficient conditions for controllability of quasi-linear delay systems in Banach spaces are established using the Schauder-Tychonov theorem, and a class of examples to which the results apply is presented.
Abstract: Sufficient conditions for the controllability of quasi-linear delay systems in Banach spaces are established. The results are obtained using the Schauder-Tychonov theorem. A class of examples to which the results apply is presented.
TL;DR: In this paper, a vibrational analysis for the four isomers of the molecule SiC2 has been performed at the SCF level of theory using split valence basis sets 3G-21G, 3G−21G∗ and 6G−31G.
Abstract: Ab initio studies and vibrational analysis are reported for the four isomers of the molecule SiC2. The molecule has been optimized at the SCF level of theory using split valence basis sets 3G–21G, 3G–21G∗ and 6G–31G. Huzinaga-Dunning double-zeta basis sets have also been used for the optimization. The computed structural parameters and properties have been compared with the experimental ones. The chemical hardness and chemical potential have been computed for the four isomers using density functional theory. The vibrational frequencies are obtained in 3G–21G and 3G–21G∗ basis sets.
TL;DR: In this paper, metal hydrazidocarboxylate hydrazinates, M1/3Co2/3(N2H3COO)2(N 2H4)2, where M = Mn, Fe, Co, Ni, Zn and Cd, have been prepared and characterized by chemical analyses and infrared spectra.
Abstract: Metal hydrazidocarboxylate hydrazinates, M1/3Co2/3(N2H3COO)2(N2H4)2, where M = Mn, Fe, Co, Ni, Zn and Cd, have been prepared and characterized by chemical analyses and infrared spectra. The thermoanalytical properties of these complexes have been investigated using TG and DTA. The complexes decompose in air below 300°C to yield metal cobaltites, MCo2O4. The decomposition behaviour was autocatalytic. Formation of cobaltites has been confirmed by thermogravimetry weight loss, infrared spectroscopy and X-ray diffraction.
TL;DR: In this article, waste FeIII/CrIII hydroxide, generated from the treatment of CrVI in fertiliser industry effluent, was used as an adsorbent for the removal of toxic ions such as AsIII, HgII, CrIII and PO43, from aqueous solutions.
Abstract: 'Waste' FeIII/CrIII hydroxide, generated from the treatment of CrVI in fertiliser industry effluent, was used as an adsorbent for the removal of toxic ions such as AsIII, HgII, CrIII and PO43–, and dyes such as Rhodamine-B and Procion Orange M2R, from aqueous solutions. The removal was efficient except for Procion Orange.
TL;DR: In this article, a method is given to verify the determination of refractive index of the cadmium oxide thin films from optical measurements by correlating the electrical properties with the optical properties using Drude's free electron theory.
DOI•
01 Oct 1995TL;DR: In this article, analytical, spectral and thermal properties of bidentate hydrazinium and maleate/fumarate dianions were investigated. But the bonding of the hydrazine and maleates/fumarates to the metal ion was not investigated.
Abstract: Hydrazinium hydrogenmaleate (HHM) and hydrogenfumarate (HHF) have been prepared and characterized by analytical, spectral and thermal studies.Bis-hydrazine metal maleates and fumarates of the general formula MX(N2H4)2, where M=Co, Ni or Zn and X=maleate or fumarate have been prepared by the reaction of corresponding metal nitrate hydrates with a mixture of maleic or fumaric acid (1 part) and hydrazine hydrate (4 parts). Electronic spectra and magnetic susceptibility measurements indicate that all are high-spin octahedral complexes. The IR data show that the bonding of the hydrazine and maleate/fumarate dianion to the metal ion is bidentate. Thermal decomposition studies show that the simple hydrazinium salts undergo melting followed by endothermic decomposition into gaseous products, whereas the metal complexes undergo violent exothermic decomposition to give either metal or metal oxide as the final product.
TL;DR: A new sampling inspection system involving normal and tightened plans is presented and performance measures are developed.
Abstract: A new sampling inspection system involving normal and tightened plans is presented. Performance measures are developed. The average sample number of the newly developed system is compared with those of existing plans. Procedures are indicated an tables are constructed for designing the system indexed by various combinations of parameters.
TL;DR: In this article, modified tables for the selection of double sampling plans for given Acceptable Qualtiy Level (AQL), producer's risk (α) Limiting Quality Level (LQL), and consumer risk (s) giving the minimum sum of Average Sample Numbers (ASN) at AQL and LQL under the conditions of the Poisson model for the Operating Characteristic (OC) curve.
Abstract: This paper presents modified tables for the selection of double sampling plans for given Acceptable Qualtiy Level (AQL), producer’s risk (α) Limiting Quality Level (LQL), and consumer’s risk (s) giving the minimum sum of Average Sample Numbers (ASN) at AQL and LQL under the conditions of the Poisson model for the Operating Characteristic (OC) curve.
TL;DR: In both types of cataractous lenses an increased concentration of G-6-PD was observed in 41-50 year age groups and a lower concentration was noted in 61 year and above age groups.
Abstract: The study was undertaken to determine the different concentrations of glucose-6-phosphate dehydrogenase (G-6-PD) in anterior subcapsular and mixed cataractous lenses. In both types of cataractous lenses an increased concentration of G-6-PD was observed in 41-50 year age groups and a lower concentration of G-6-PD was noted in 61 year and above age groups. Cataractous lenses of females have a higher content of G-6-PD than males. In anterior subcapsular cataractous lenses, a lower concentration of G-6-PD was noted than in mixed lenses.
TL;DR: The TL emission of CsCl: Sm crystals is due to the F center electron-V center recombination and the excited Sm2+ ions as mentioned in this paper, which shows the presence of OH− ions in these crystals.