Search Results - (Author, Cooperation:N. Patil)

2018-05-09

National Academy of Sciences

0027-8424

1091-6490

Biology

Medicine

Natural Sciences in General

2013-09-27

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

2018-05-22

The American Association of Immunologists (AAI)

0022-1767

1550-6606

Medicine

1089-7550

AIP Digital Archive

Physics

Our recent studies on polycrystalline samples of the R5Rh4Sn10 series have shown unusual multiple ordering with a first order magnetic transition in tetragonal Nd5Rh4Sn10 at low temperatures. In this study, we report resistivity, susceptibility, and heat capacity (in various fields up to 10 T) in a single crystal of Nd5Rh4Sn10. We observe antiferromagnetic ordering of Nd3+ spins along the c axis while they order ferromagnetically along the a axis. The first order transition was rapidly suppressed with fields above 4 T along the c axis while it was marginally affected up to 10 T for field along the a axis. We propose a tentative model to explain this feature. © 1999 American Institute of Physics.

Electronic Resource

1077-3118

AIP Digital Archive

Physics

History-dependent metastable states with different bulk properties are formed in the vortex state of the type-II superconductor 2H-NbSe2. Magnetic measurements demonstrate the difference between the shielding responses of a field- and a zero-field-cooled state, and provide a procedure for switching the system from one state to the other. © 1999 American Institute of Physics.

Electronic Resource

1089-7623

AIP Digital Archive

Physics

Electrical Engineering, Measurement and Control Technology

The development of a low-noise variable-temperature preamplifier for self-sensing piezoelectric tuning fork force sensors is presented. The preamplifier utilizes a pair of commercially available GaAs field effect transistors to achieve high impedance and low noise over a wide range of temperatures. Using a standard 32 kHz quartz tuning fork, the base noise level achieved is 20 dB below the thermal noise resonance at room temperature and at 4.2 K. The circuit diagram, biasing points, and noise specifications are presented, and the application for variable temperature scanning probe microscopy is discussed. © 2002 American Institute of Physics.

Electronic Resource

1432-1130

Springer Online Journal Archives 1860-2000

Chemistry and Pharmacology

Abstract A method is proposed for the separation and determination of mercury(II) in environmental samples after its extraction from salicylate solution using triphenylphosphine sulphide (TPPS) as an extractant. The extraction conditions are optimized and reported. The nature of the extracted species is ascertained by a plot of log of distribution ratio versus log of concentration of salicylate and TPPS.

Electronic Resource

1573-4811

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Electronic Resource

1573-5036

Calcium carbonate ; Iron ; Manganese ; Organic matter ; Sorghum

Springer Online Journal Archives 1860-2000

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Summary The effect of CaCO3 and organic matter on the availability of iron and manganese was studied on sorghum (Sorghum bicolor). Addition of calcium carbonate caused significant decrease in dry matter and grain yield. But yields tended to increase with the addition of organic matter at the rate of 15 t/ha. The iron concentration decreased with the addition of CaCO3 at all the stages of crop growth. Like iron, concentration of manganese also decreased with the increase in added CaCO3. Organic matter increased the iron concentration both at seedling and flowering stage. The concentration of manganese was, however, dependent on the stage of the crop.

Electronic Resource

1573-5036

Chemical composition ; Black gram ; Fertilization ; Seed yield ; Vigna mungo

Springer Online Journal Archives 1860-2000

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Summary Fertilization of black gram with nitrogen (20 kg N/ha) in the form of urea produced a 32% increase in yield over control, and significantly improved nutritional quality of seeds by increasing crude protein, crude fat, methionine, calcium, phosphorus and iron contents without increasing polyphenols. The highest yield of black gram was obtained when plants were supplied with phosphorus at a rate of 40 kg P2O5/ha. Crude protein, crude fats, phosphorus and iron contents increased whereas calcium content decreased significantly at 40 kg P2O5/ha. A continuous increase in polyphenol content was observed with increasing levels of phosphorus but it was significantly increased at P rates above 40 kg/ha. Fertilization with N and P in a 1∶2 ratio at 20 kg N/ha and 40 kg P2O5/ha produced a 32% seed yield increase and improved the nutritional value of black gram seeds.

Electronic Resource

1572-9532

Springer Online Journal Archives 1860-2000

Physics

Abstract Maugin's Scheme for a relativistic perfect magnetofluid is used to study the convection-free stress and convective deformations of the matter tensor for the magnetofluid. It is proved that the convection-free stress of the magnetofluid implies the conservation of the pressure, the density, and the magnitude of the magnetic field along the flow vector. The relation between convective deformations of the matter tensor for the magnetofluid and deformation tensor is obtained.

Electronic Resource

1572-9532

Springer Online Journal Archives 1860-2000

Physics

Abstract This paper aims at the study of the Cauchy problem for the general relativistic perfect magnetofluid. The consistency and uniqueness condition to be satisfied on the hypersurface by three unknown quantities in the magnetohydrodynamic field equations is obtained. For unit magnetic permeability the result agrees in form with that of Lichnerowicz.

Electronic Resource

1573-6784

Springer Online Journal Archives 1860-2000

Process Engineering, Biotechnology, Nutrition Technology

Summary A protocol of purification is devised that gave high recovery of homogeneous arginase from ox erythrocytes. The protocol involved haemolysis, heat treatment, CM- and DEAE-Sepharose chromatography, arginine AH-Sepharose chromatography and molecular sieving through Biogel P-150, all in the presence of 2-mercaptoethanol. It afforded (a) elution of arginase as a single peak, (b) almost 2900 fold purification, (c) 30% recovery and (d) electrophoretically homogeneous arginase. The purified arginase exhibited (a) M.W. of 115,000, (b) dissociation upon SDS treatment into homologous monomers of 30 kDa, (c) optimum pH and temperature 11.5 and 55° C, respectively and (d) Km value for L-arginine-HCl 2.2–2.3 mM, characteristic of the ureotelic type.

Electronic Resource

0021-8995

Chemistry ; Polymer and Materials Science

Wiley InterScience Backfile Collection 1832-2000

Chemistry and Pharmacology

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

1 Ill.

Electronic Resource

0021-8995

Chemistry ; Polymer and Materials Science

Wiley InterScience Backfile Collection 1832-2000

Chemistry and Pharmacology

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

A method is developed to estimate the composition of a powder mixture using breadths of over-lapping x-ray diffraction (XRD) lines. The application of the method is illustrated for analyzing blends of cotton and jute.

4 Ill.

Electronic Resource

0021-8995

Chemistry ; Polymer and Materials Science

Wiley InterScience Backfile Collection 1832-2000

Chemistry and Pharmacology

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

1 Ill.

Electronic Resource

1588-2780

Springer Online Journal Archives 1860-2000

Chemistry and Pharmacology

Energy, Environment Protection, Nuclear Power Engineering

Abstract The distribution of Th(IV) between aqueous sulphuric acid and organic phases of N-n-octylaniline in xylene is described. The dependence of the metal extraction on acidity and extractant concentration is investigated. Based on the results obtained, the possible extraction mechanism is discussed. The determination of Th(IV) and its separation from synthetic mixtures is suggested. The method is extended to the analysis of thorium in monazite and gas mantles.

Electronic Resource

1588-2780

Springer Online Journal Archives 1860-2000

Chemistry and Pharmacology

Energy, Environment Protection, Nuclear Power Engineering

Abstract Triphenylarsine oxide is proposed as an extractant for the solvent extraction of uranium and thorium salicylates. The optimum extraction conditions are established by studying the various parameters such as pH, sodium salicylate concentration, triphenylarsine oxide concentration, diluents and shaking time. The probable extracted species as ascertained by logD-logC plots are UO2(Hsal)2·2TPAsO and Th(Hsal)4·2TPAsO. The method is simple, fast, precise and permits the determination of uranium and thorium in monazite sand samples.

Electronic Resource

1573-8248

Psyllaephagus ; Tamarixia ; Heteropsylla ; biological control

Springer Online Journal Archives 1860-2000

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Résumé La fécondité en fonction de l'âge de deux parasitoïdes du psylleHeteropsylla cubana, Psyllaephagus yaseeni etTamarixia leucaenae a été étudiée en condition de laboratoire. A 25 °C,P. yaseeni présente une fécondité plus élevée (R0=192,9) queT. leucaenae (R0=71,2);T. leucaenae montre cependant une sex ratio plus faible (environ 99 % de femelles) queP. yaseeni (environ 50 %). Le taux d'accroissement potentiel (rm=0,236) deT. leucaenae était plus élevé que celui deP. yaseeni (rm=0,188). Les vitesses de développement des parasitoïdes ont été examinées à des températures constantes et fluctuantes et les équations de la vitesse de développement en fonction de la température ont été calculées. A 25 °C, la durée moyenne des générations était respectivement de 28,0 et 18,1 jours pourP. yaseeni etT. leucaenae. Aux températures de 21,5, 25 et 30 °C la durée totale de développement (de l'œuf à l'adulte) était de 28,5, 21,9 et 14,7 jours chezP. yaseeni et 19,2, 12,6 et 9,5 jours chezT. leucaenae. Le taux de parasitisme était faible et la mortalité nymphale était élevée à la température la plus basse, 21,5 °C, pour les deux parasitoïdes. Tous deux présentaient une survie faible à 100 % de HR;P. yaseeni survivait particulièrement bien à une température de 21 °C et à 44 ou 76% d'HR. P. yaseeni attribuait environ 58 % de femelles aux larves de premier stade de développement mais seulement 12 % aux larves de second stade. Environ 99 % de toutes les éclosions deT. leucaenae était constituée de femelles. La taille des femelles issues des larves de 5e stade étaient significativement supérieure à la taille de celles qui émergeaient des larves de 3e ou 4e stade.

Abstract Age specific fecundity of two parasitoids,P. yaseeni andT. leucaenae, of the leucaena psyllidH. cubana, were studied under laboratory conditions. At 25 °C,P. yaseeni had a greater fecundity (R0=192.9)_thanT. leucaenae (R0=71.2);T. leucaenae however had a lower sex ratio (about 99 % females) thanP. yaseeni (about 50 % females). Innate capacity for increase (rm=0.236) ofT. leucaenae was higher thanP. yaseeni (rm=0.188). Developmental rates of the parasitoids were examined at constant and fluctuating temperatures and equations of the rate of development against temperature were calculated. At 25 °C, mean generation times were 28.0 and 18.1 days forP. yaeseeni andT. leucaenae respectively. At temperatures of 21.5, 25, and 30 °C total development times (egg to adult) were 28.5, 21.9, and 14.7 days inP. yaseeni and 19.2, 12.6, and 9.5 days inT. leucaenae respectively. The level of parasitism was low and pupal mortality was high at the lower temperature of 21.5 °C for both parasitoids. Both parasitoids showed poor survivorship at 100 % RH,P. yaseeni survived particularly well (32 days) at a temperature of 21.5 °C and 44 or 76 % RH. P. yaseeni allocated about 58 % females to first instar psyllid nymphs but only 12 % females to second instars. About 99 % of allT. leucaenae births were females. Significantly largerT. leucaenae females emerged from fifth instar parasitized nymphs than third or fourth instars.

Electronic Resource

0021-8995

Chemistry ; Polymer and Materials Science

Wiley InterScience Backfile Collection 1832-2000

Chemistry and Pharmacology

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

Single- and two-ply yarns of different counts were swollen slack under optimum conditions in aqueous zinc chloride and stretched back to original length. While two-ply yarns showed an improvement in tenacity that was less pronounced in finer counts, single yarns always showed a fall in tenacity. Various properties of the treated yarns like packing fraction, fiber and yarn orientation, cross-sectional morphology, etc. were evaluated to ascertain the likely factors responsible for the differential behavior of the chemically treated single- and two-ply yarns.

6 Ill.

Electronic Resource