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排序方式: 共有591条查询结果,搜索用时 15 毫秒
211.
Mengna Su Mahesh Venkatachalam Suzanne S Teuber Kenneth H Roux Shridhar K Sathe 《Journal of the science of food and agriculture》2004,84(10):1119-1125
Whole unprocessed almonds, cashew nuts and walnuts were each subjected to γ‐irradiation (1, 5, 10 and 25 kGy) followed by heat processing including autoclaving (121 °C, 15 psi for 15 and 30 min), dry roasting (138 and 160 °C for 30 min each, 168 and 177 °C for 12 min each), blanching (100 °C for 5 and 10 min), oil roasting (191 °C, 1 min) and microwave heating (500 W for 1 and 3 min). Rabbit polyclonal antibodies were raised against each major protein isolated from defatted, but not subjected to γ‐irradiation and/or any thermal processing, almond, cashew nut and walnut flours. Immunoreactivity of almond, cashew nut and walnut proteins soluble in borate saline buffer, normalised to 1 mg protein ml?1 for all samples, was determined by inhibition enzyme‐linked immunosorbent assay (ELISA) and Western blotting. ELISAs and Western blotting experiments indicated that almond, cashew nut and walnut proteins exposed to γ‐irradiation alone or followed by various thermal treatments remained antigenically stable. Copyright © 2004 Society of Chemical Industry 相似文献
212.
Mahesh Venkatachalam Shridhar K Sathe 《Journal of the science of food and agriculture》2007,87(8):1539-1549
Val bean (Lablab purpureus L.) proteins were fractionated using the Osborne protein fractionation scheme and biochemically characterized. The seed flour contained 302 g kg?1 protein (micro‐Kjeldahl N × 6.25) on a dry weight basis. Albumin, globulin, prolamin, and glutelin accounted for 22.8%, 45.1%, 1.8% and 30.3%, respectively, of the total soluble seed proteins. Among the solvents tested, 0.1 mol L?1 aqueous NaOH was the most effective protein solubilizer. Isoelectric focusing indicated the seed proteins to be predominantly acidic (pI range was ~4–7). Val globulin is a glycoprotein composed of at least three polypeptides in the molecular mass range 51–64 kDa. Albumin fraction had the highest trypsin inhibitory activity, while the globulin fraction registered the highest hemagglutinating activity. Sulfur amino acids were the first limiting amino acids in the total seed proteins. The proportion of essential to total [E/T(%)] amino acids for the bean flour was 36.97%. Among the protein fractions, glutelin fraction had the highest E/T (42.86%) followed by albumin (41.57%), globulin (39.87%), and prolamin (39.15%). Native globulin, although resistant to pepsin, was effectively digested in vitro upon moist heat (100 °C, 30 min) denaturation. Copyright © 2007 Society of Chemical Industry 相似文献
213.
Tribedi Bora P. Saravanan S. Ravi 《Journal of Superconductivity and Novel Magnetism》2013,26(5):1645-1648
LaCr1?x Fe x O3 (x=0, 0.4, 0.45, 0.6 and 1.0) have been prepared in single phase form with Pbnm space group. The x=0 sample exhibits antiferromagnetic (AFM) transition at Néel temperature T N =290 K and it is found to reduce with increase in doping concentration up to x=0.45. Magnetization reversal below a compensation temperature of 100 K was observed in the x=0.45 sample and it is explained in terms of competition between two AFM interactions and associated magnetic anisotropy. Exchange bias was observed in the x=0.45 sample and the temperature dependence of exchange bias field and vertical magnetization shift were analyzed. 相似文献
214.
Haajira Beevi Habeeb Rahuman Ranjithkumar Dhandapani Santhoshini Narayanan Velmurugan Palanivel Ragul Paramasivam Ramalakshmi Subbarayalu Sathiamoorthi Thangavelu Saravanan Muthupandian 《IET nanobiotechnology / IET》2022,16(4):115
The alarming effect of antibiotic resistance prompted the search for alternative medicine to resolve the microbial resistance conflict. Over the last two decades, scientists have become increasingly interested in metallic nanoparticles to discover their new dimensions. Green nano synthesis is a rapidly expanding field of interest in nanotechnology due to its feasibility, low toxicity, eco‐friendly nature, and long‐term viability. Some plants have long been used in medicine because they contain a variety of bioactive compounds. Silver has long been known for its antibacterial properties. Silver nanoparticles have taken a special place among other metal nanoparticles. Silver nanotechnology has a big impact on medical applications like bio‐coating, novel antimicrobial agents, and drug delivery systems. This review aims to provide a comprehensive understanding of the pharmaceutical qualities of medicinal plants, as well as a convenient guideline for plant‐based silver nanoparticles and their antimicrobial activity. 相似文献
215.
Muthukonda Venkatakrishnan Shankar Srinivasan Anandan Nallusamy Venkatachalam Banumathi Arabindoo Velayutham Murugesan 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2004,79(11):1279-1285
A thin‐film reactor was fabricated with immobilised TiO2 and this reactor was used for photocatalytic mineralisation of common pesticides, 2,4‐dichlorophenoxyacetic acid (DPA) and monocrotophos (MCP), and their commercially formulated products in an aqueous solution. Zeolites HY and Hβ with different physico‐chemical properties were chosen as support material. The supported TiO2 was used for the degradation and mineralisation studies. TiO2/zeolite‐supported photocatalyst showed enhanced degradation efficiency compared with bare TiO2 for both DPA and MCP. Formulated pesticides were mineralised at shorter irradiation times than technical grade pesticides. The results clearly demonstrated that the good adsorption capacity of the support, and the effective light utilisation by TiO2, improved the photocatalytic activity of supported TiO2. Reusability studies have also shown the stability of supported photocatalysts. Copyright © 2004 Society of Chemical Industry 相似文献
216.
B Sanjai Anasuya Raghunathan T S Natarajan G Rangarajan S Venkatachalam 《Bulletin of Materials Science》1997,20(2):279-282
Heat treatment of poly nickel phthalocyanine leads to a charge transfer and hence there is an improvement in conductivity
by 5 orders of magnitude. DC electrical conductivity measurements have been carried out in the heat-treated samples in the
temperature range 270 K-10 K. Mott’s variable range hopping conduction in one dimension is observed in the temperature range
270K-77K and the conductivity remains constant in the temperature range 77K-10K. 相似文献
217.
K. S. Ravichandran K. Chandra Sekhara Rao R. Saravanan 《The International Journal of Advanced Manufacturing Technology》2002,19(12):879-888
Group technology (GT) is one of the key issues in the successful implementation of flexible manufacturing systems (FMSs).
The success of GT implementation is in the effective formation of part families (PFs) and similarity coefficients measures.
Over the past three decades, many similarity coefficients have been proposed, but a better similarity coefficient measure
is required. The decision-making process in a manufacturing system often involves uncertainties and ambiguities. Under such
circumstances, fuzzy methodologies have proved to be an effective tool for taking fuzziness into consideration. The first
part of this paper deals with the fuzzy part-family formation. This was achieved in the following ways:
1. A new similarity coefficient measure has been developed and this coefficient measure is used to form a part-family.
2. A mathematical model that uses this similarity coefficient for solving the part-family formation problems optimally in
an FMS is developed.
The fuzzy approach has the special advantage of producing more accurate results than conventional clustering and other methods.
It not only reveals the specific part family that a part belongs to, but also provides the degree of membership of a part
associated with each part family. This will give a balanced work load for the machine. In the second part of this paper, the
introduction of the concept of genetic algorithms is proposed to eliminate more job sequences and, finally, the optimum sequence
is obtained through the minimum penalty cost. Software is developed and implemented to obtain an optimum sequence and, finally,
a numerical example is given as an illustration. 相似文献
218.
Anodic polarisation studies on copper matte revealed that a copper matte electrode polariess abruptly in H,SO, solution but not in HCl solution. Anodic dissolution of copper matte was studied at various anodic potentials in 2 N solutions of HCl and H,SO,. It was found that at lower anodic potential (around 0.4 volt vs. saturated calomel electrode) copper dissolves preferentially (at 90% current efficiency) over iron (8–10% C.E.), in both the acid solutions. It was further observed that this preferential dissolution of copper takes place over a longer period (about 6 h) in HCl than in H2SO4 solution (about 3 h). Preferential dissolution of copper from copper matte was found to be independent of HCl concentration (0.5 N to 4 N). From the X-ray diffraction analysis of the original copper matte and electrolysed copper matte, it was established that digenite and bornite phases of copper matte dissolved causing preferential dissolution of copper. 相似文献
219.
T. Jeevananda Siddaramaiah S. Seetharamu S. Saravanan Lawrence D Souza 《Synthetic Metals》2004,140(2-3):247-260
An inverted emulsion process was adopted to synthesize conducting copolymers of aniline and acrylonitrile using benzoyl peroxide (BPO) as a novel oxidizing agent. The influence of polyacrylonitrile (PAN) ratio on the properties of conducting copolymers is reported. The chemical structures of the copolymers were characterized spectroscopically by UV-Vis, FT-IR, FT-Raman and EPR. The solubility of polyaniline (PAni) and PAni–PAN copolymers in dimethyl sulphoxide (DMSO) was confirmed by electronic absorption spectra. The conductivity of these copolymers lie in the range (1.26–4.20)×10−2 S/cm. TGA thermogram of copolymers showed multi-step thermal degradation behaviour. X-ray scattering studies reflected that the copolymers are semicrystalline and showed two crystalline peaks at 17 and 25 (2θ). 相似文献
220.
K. R. Murali P. Elango P. Andavan K. Venkatachalam 《Journal of Materials Science: Materials in Electronics》2008,19(3):289-293
CdS
x
Se1−x
films were deposited for the first time by the brush plating technique from aqueous precursors. X-ray diffraction patterns
of the films indicated polycrystalline structure with peaks corresponding to the hexagonal phase. Optical absorption measurements
indicated the band gap to shift from 1.68 to 2.39 eV as the value of x is increased. XPS spectra indicated the peaks corresponding to Cd (3d5/2 and 3d3/2), Se (3d5/2 and 3d3/2) and S (3d5/2 and 3d3/2) levels. Surface morphology studies indicated the grain size to increase with increase of selenium concentration. The resistivity
of the films changed from 20 ohm cm to 250 ohm cm as the sulphur content increased. 相似文献