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A pseudo-line source has been realized by using an accelerator based DT point neutron source. The pseudo-line source is obtained by time averaging of continuously moving point source or by superposition of finely distributed point... more
A pseudo-line source has been realized by using an accelerator based DT point neutron source. The pseudo-line source is obtained by time averaging of continuously moving point source or by superposition of finely distributed point sources. The line source ...
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Page 1. Kinetic modelling of the active transport of copper(II) across liquid membranes usingthiourea derivatives immobilized on microporous hydrophobic supports Fatima Z. El Aamrani, Anil Kumar¤ and Ana M. Sastre* Department of Chemical... more
Page 1. Kinetic modelling of the active transport of copper(II) across liquid membranes usingthiourea derivatives immobilized on microporous hydrophobic supports Fatima Z. El Aamrani, Anil Kumar¤ and Ana M. Sastre* Department of Chemical Engineering, Universitat ...
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Research Interests: Depression, Magnetic Resonance Imaging, Neuropsychopharmacology, Adolescent, Positron Emission Tomography, and 15 moreDopamine, Brain Mapping, Cortisol, Humans, Female, Male, Amphetamine, Adult, Drug Effects, Psychological Stress, Glucocorticoids, Area Under Curve, Dopamine antagonists, Corpus striatum, and hydrocortisone
In all, 19 research subjects, with current histories of frequent cocaine use, were exposed to cocaine-related cues to elicit drug craving. We measured the change of occupancy of dopamine at D2-like receptors with positron emission... more
In all, 19 research subjects, with current histories of frequent cocaine use, were exposed to cocaine-related cues to elicit drug craving. We measured the change of occupancy of dopamine at D2-like receptors with positron emission tomography (PET) and inferred a change of intrasynaptic dopamine (endogenous dopamine release), based on the displacement of radiotracer [(11)C]raclopride. Receptor occupancy by dopamine increased significantly in putamen of participants who reported cue-elicited craving compared to those who did not. Further, the intensity of craving was positively correlated with the increase in dopamine receptor occupancy in the putamen. These results provide direct evidence that occupancy of dopamine receptors in human dorsal striatum increased in proportion to subjective craving, presumably because of increased release of intrasynaptic dopamine.
Research Interests: Magnetic Resonance Imaging, Neuropsychopharmacology, Positron Emission Tomography, Dopamine, Brain Mapping, and 15 moreHumans, Cues, Female, Cocaine, Male, Dopamine Receptors, Synaptic Transmission, Neurons, Adult, Predictive value of tests, Functional Laterality, Raclopride, Dopamine antagonists, Corpus striatum, and Psychology and Cognitive Sciences
Research Interests: Genetics, Cognitive Science, Polymorphism, Family, Neurogenetics, and 14 moreHumans, Genetic Testing, Mutation, Proteins, Genetic linkage analysis, Genomic DNA, Tuberous sclerosis, Amino Acid Substitution Rates, Neurosciences, Tuberous sclerosis complex, DNA mutational analysis, Autosomal Dominant, Mutation analysis, and reverse transcriptase polymerase chain reaction
Research Interests: Biopsy, Prospective studies, Humans, Child, Kidney, and 15 moreFemale, Drug Resistance, Male, Cyclosporine, Clinical Sciences, Steroid Resistant Nephrotic Syndrome, Side Effect, Cyclophosphamide, Age of Onset, Nephrotic syndrome, Focal Segmental Glomerulosclerosis, Serum albumin, Glomerular Filtration Rate, Child preschool, and Immunosuppressive Agents
Abstract Synthesis of 12-aryl-8, 9, 10, 12-tetrahydro-benzo [a] xanthen-11-ones was achieved by one-pot condensation of β-naphthol, substituted benzaldehydes, and 1, 3-dicarbonyl compounds catalyzed by Sc (OTf) 3 under microwave... more
Abstract Synthesis of 12-aryl-8, 9, 10, 12-tetrahydro-benzo [a] xanthen-11-ones was achieved by one-pot condensation of β-naphthol, substituted benzaldehydes, and 1, 3-dicarbonyl compounds catalyzed by Sc (OTf) 3 under microwave irradiation in excellent isolated yields. The catalyst was recycled up to four cycles with no appreciable loss in catalytic activity. The compounds were evaluated for Src kinase activity and anticancer activity. Graphical abstract
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The variation in transposition history of different Ty1-copia group LTR retrotransposons in the species lineages of the Pisum genus has been investigated. A heterogeneous population of Ty1-copia elements was isolated by degenerate PCR and... more
The variation in transposition history of different Ty1-copia group LTR retrotransposons in the species lineages of the Pisum genus has been investigated. A heterogeneous population of Ty1-copia elements was isolated by degenerate PCR and two of these (Tps12 and Tps19) were selected on the basis of their copy number and sequence conservation between closely related species for further in-depth study of their transpositional history in Pisum species. The insertional polymorphism of these elements and the previously characterised PDR1 element was studied by sequence-specific amplification polymorphism (SSAP). Each of these elements reveals a unique transpositional history within 55 diverse Pisum accessions. Phylogenetic trees based on the SSAP data show that SSAP markers for individual elements are able to resolve different species lineages within the Pisum genus. Finally, the SSAP data from all of these retrotransposon markers were combined to reveal a detailed picture of the intra and interspecies relationships within Pisum.
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4,4 - bis-(n-propylamino)-biphenyl, C18N2H24, Mr = 268, monoclinic, Cc, a = 6.381 (1) Å, b= 14.153 (3) Å, c= 17.730 (3) Å, β = 81.80 (2)°, v = 1584.83 Å3, z = 4, Dx = 1.125 mg/m3, μ = 0.659cm, F (000) = 584.0, λ (Mo Kα) = 0.71073 Å, final... more
4,4 - bis-(n-propylamino)-biphenyl, C18N2H24, Mr = 268, monoclinic, Cc, a = 6.381 (1) Å, b= 14.153 (3) Å, c= 17.730 (3) Å, β = 81.80 (2)°, v = 1584.83 Å3, z = 4, Dx = 1.125 mg/m3, μ = 0.659cm, F (000) = 584.0, λ (Mo Kα) = 0.71073 Å, final R and wR are 0.0499 and 0.1438 respectively using 1386 reflections.
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Research Interests: Molecular Biology, Polymorphism, Plant Breeding, Innate immunity, Plant diseases, and 15 moreDisease resistance, Primer design, Molecular cloning, Genomic DNA, Genotype, Molecular Characterization, Molecular Marker, Genetic Relatedness, Amino Acid Sequence, Base Sequence, Eleusine Indica, Genetic Markers, Biochemistry and cell biology, Molecular Biology Reports, and Molecular Sequence Data
Seed development is a complex process controlled by temporal and spatial expression of many transcription factors (TF) inside the developing seed. In the present study, transcript profiles of all the 30 members of rice DofTFs from... more
Seed development is a complex process controlled by temporal and spatial expression of many transcription factors (TF) inside the developing seed. In the present study, transcript profiles of all the 30 members of rice DofTFs from flowering to seed development stages were analyzed. It was found that 16 Dof genes besides a previously characterized Dof gene…
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Research Interests: Molecular Biology, Photosynthesis, Gene expression, Chlorophyll, Nitrogen, and 15 moreNitrogen metabolism, Enzyme, Enzyme activity, Plant Development, Base Sequence, Quaternary Ammonium Compounds, PLANT PROTEINS, Glutamate Dehydrogenase, chlorophyll Content, Biochemistry and cell biology, Gene expression profiling, Molecular Biology Reports, Molecular Sequence Data, High protein, and reverse transcriptase polymerase chain reaction
Research Interests: Sequence Analysis, Triticum Aestivum, Plant diseases, Molecular cloning, Protein Sequence Analysis, and 15 moreGenotype, Amino Acid Sequence, Base Sequence, In Silico, Triticum, Gene Family, Enzyme Linked Immunosorbent Assay, Nucleotides, Biochemistry and cell biology, BASIDIOMYCOTA, Molecular Biology Reports, Molecular Sequence Data, Sequence homology, reverse transcriptase polymerase chain reaction, and Triticum aestivum L
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ABSTRACT
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ABSTRACT Though various types of force transducers have been developed over many years, research is continuing through the globe regarding the development of different types of force transducers. The present paper discusses the... more
ABSTRACT Though various types of force transducers have been developed over many years, research is continuing through the globe regarding the development of different types of force transducers. The present paper discusses the development of square ring shaped force transducers and their metrological characterization based on the calibration procedures according to standards ISO 376:2004 and IS: 4169-1988 (reaffirmed 2003). The force transducers have been developed as a modification of ring shaped force transducers and strain gauges have been mounted on suitable locations. The force transducers have been studied analytically and computationally. The force transducers are found to have good metrological characteristics and further efforts are being focused on improving the metrological characteristics of force transducers.
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Abstract 3D-orthogonal-woven-C–SiC composite blocks were fabricated using liquid–silicon-infiltration and were characterized for thermal and mechanical properties. Coefficient of thermal expansion (CTE) and thermal-diffusivity of the... more
Abstract 3D-orthogonal-woven-C–SiC composite blocks were fabricated using liquid–silicon-infiltration and were characterized for thermal and mechanical properties. Coefficient of thermal expansion (CTE) and thermal-diffusivity of the blocks were determined in the three mutually perpendicular directions. CTE was found to lie in the range− 0.5× 10− 6 to 0.9× 10− 6/C over the temperature range 25–1050 C while thermal diffusivity was found to be in the range 37.0–7.0 mm 2/s over the temperature range 25–1200 C. The composites were ...
Research Interests: Materials Engineering, Mechanical Engineering, Microstructure, Composite Materials, THERMAL DIFFUSIVITY, and 10 moreHeat Flux, Flexural Strength, Thermal Shock, Thermal Properties, Thermal Expansion, Ceramic Matrix Composite, Heat Treatments, Bending Test, Coefficient of Thermal Expansion, and Mechanical Property
Research Interests: Materials Engineering, Mechanical Engineering, Microstructure, Composites, Composite Materials, and 12 moreCeramics, Silicon Carbide, Flexural Strength, Microstructures, Chemical Composition, Fracture Toughness, Carbon Fibers, Tensile Strength, Fiber Reinforcement, Rupture Strength, Arithmetic mean, and Mechanical Property
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ABSTRACT Two low band gap conjugated polymers P1 (alternating phenylenevinylene contg. thiophene and pyrrole rings) and P2 (alternating phenylenevinylene with dithenyl (thienothiadiazole) segments) having optical band gap 1.65 eV and 1.74... more
ABSTRACT Two low band gap conjugated polymers P1 (alternating phenylenevinylene contg. thiophene and pyrrole rings) and P2 (alternating phenylenevinylene with dithenyl (thienothiadiazole) segments) having optical band gap 1.65 eV and 1.74 eV, resp., were used as electron donor along with the PC70BM as electron acceptor for the fabrication of bulk heterojunction solar cells. The power conversion efficiency (PCE) of BHJ devices based on P1:PC70BM and P2:PC70BM cast from THF solvent is ∼2.84% and 2.34%, resp., which is higher than the BHJ based on PCBM as electron acceptor. The authors have studied the effect of mixed (1-chloronaphthalene (CN)/THF) solvent, modification of PEDOT:PSS layer and inserting of TiO2 layer, on the photovoltaic performance of polymer solar cell. The authors have achieved power conversion efficiency of 5.07% for the polymer solar cells having structure ITO/PEDOT:PSS (modified)/P1:PC70BM (CN/THF cast)/TiO2/Al. The effect of solvent used for spin coating, modification of PEDOT:PSS laye
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... View full text Full access. DOI: 10.1080/10426914.2010.527415 Anil Kumar a * , Sachin Maheshwari b , Chitra Sharma c & Naveen Beri a Available online: 31 Mar 2011. ... [CrossRef], [Web of Science ®] View all references, 22. Kansal... more
... View full text Full access. DOI: 10.1080/10426914.2010.527415 Anil Kumar a * , Sachin Maheshwari b , Chitra Sharma c & Naveen Beri a Available online: 31 Mar 2011. ... [CrossRef], [Web of Science ®] View all references, 22. Kansal , HK ; Singh , S. ; Kumar , P. Parametric ...
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The present experimental investigations have been carried to evaluate machining efficiency with additive powder mixed in dielectric fluid of electrical discharge machining on Inconel 718 with copper and cryogenically treated copper... more
The present experimental investigations have been carried to evaluate machining efficiency with additive powder mixed in dielectric fluid of electrical discharge machining on Inconel 718 with copper and cryogenically treated copper electrodes. Experiments have been conducted to study the effect of input parameters viz polarity, type of electrode, peak current, pulse on time, duty cycle, gap voltage, retract distance and
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... Jasmine Sinha, Rabindra Sahoo and Anil Kumar*. ... References. This article references 25 other publications. 1. (a) Handbook of Conducting Polymers, 3rd ed.; Skotheim, TA, and Reynolds, JR, Eds.; CRC Press: Boca Raton, FL, 2007. ...
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A novel small molecule (SM) with a low-band-gap based on acenaphthoquinoxaline was synthesized and characterized. It was soluble in polar solvents such as N,N-dimethylformamide and dimethylacetamide. SM showed broad absorption curves in... more
A novel small molecule (SM) with a low-band-gap based on acenaphthoquinoxaline was synthesized and characterized. It was soluble in polar solvents such as N,N-dimethylformamide and dimethylacetamide. SM showed broad absorption curves in both solution and thin films with a long-wavelength maximum at 642 nm. The thin film absorption onset was located at 783 nm, which corresponds to an optical band gap of 1.59 eV. SM was blended with PCBM to study the donor-acceptor interactions in the blended film morphology and the photovoltaic response of the bulk heterojunction (BHJ) devices. The cyclic voltammetry measurements of the materials revealed that the HOMO and LUMO levels of SM are well aligned with those of PCBM, allowing efficient photoinduced charge transfer and suitable open circuit voltage, leading to overall power conversion efficiencies (PCEs) of approximately 2.21 and 3.23% for devices with the as-cast and thermally annealed blended layer, respectively. The increase in the PCE with the thermally annealed blend is mainly attributed to the improvement in incident photon to current efficiency (IPCE) and short circuit photocurrent (J(sc)). Thermal annealing leads to an increase in both the crystallinity of the blend and hole mobility, which improves the PCE.
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... al. 1984; Bole & Almeida 1987; Yadav et al. 1998, Sreedevi & Binoj Kumar 1999; Khanna et al. 2000; Gaikwad et al. 2002, 2004; Pradeep & Sunil 2003; Punekar et al. 2003a, b and Punekar... more
... al. 1984; Bole & Almeida 1987; Yadav et al. 1998, Sreedevi & Binoj Kumar 1999; Khanna et al. 2000; Gaikwad et al. 2002, 2004; Pradeep & Sunil 2003; Punekar et al. 2003a, b and Punekar & Lakshminarasimhan 2004). A detailed ...
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Hydrogenated amorphous silicon (a-Si:H) based shift registers are presented. The gate-driver switching requirements, for the quarter video graphics array, are discussed. Advantages of the shift-register integration with the pixel array... more
Hydrogenated amorphous silicon (a-Si:H) based shift registers are presented. The gate-driver switching requirements, for the quarter video graphics array, are discussed. Advantages of the shift-register integration with the pixel array are discussed. The circuit metastability considerations due to the threshold voltage shift in the a-Si:H devices under electrical stress are also presented. .
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... approach at our institu-tion from july 2001 through January 2007 and compared them with recent literature. ... Multivariate analyses identified tumor size, nodal status and nuclear, but not cytoplasmic, expression of survivin as... more
... approach at our institu-tion from july 2001 through January 2007 and compared them with recent literature. ... Multivariate analyses identified tumor size, nodal status and nuclear, but not cytoplasmic, expression of survivin as significant ... 12th World Conference on Lung Cancer ...
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CSiC composite Jet-Vanes were fabricated using liquid silicon infiltration and tested in a plume of aluminum based solid propellant to study erosion resistance. The Jet-Vanes showed excellent resistance to thermo-oxidative erosion;... more
CSiC composite Jet-Vanes were fabricated using liquid silicon infiltration and tested in a plume of aluminum based solid propellant to study erosion resistance. The Jet-Vanes showed excellent resistance to thermo-oxidative erosion; average linear and mass erosion rates were 1 ...
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Effect of siliconization conditions on thermal diffusivity of 3D-stitched fiber architecture-based C–SiC composites was investigated to select desired conditions. Several 3D-stitched C–SiC composite blocks were prepared using coal–tar... more
Effect of siliconization conditions on thermal diffusivity of 3D-stitched fiber architecture-based C–SiC composites was investigated to select desired conditions. Several 3D-stitched C–SiC composite blocks were prepared using coal–tar pitch as a carbon precursor and siliconization was carried out at 1450 and 1650° C for 10 and 120min. Thermal diffusivity of blocks was investigated using laser-flash equipment in in-plane and through-thickness directions. It varies from 77mm2/s at room-temperature to 14.7 mm2/s at 1500° C in in- ...
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Carbon fiber reinforced silicon carbide (C–SiC) composites are promising materials for a severe thermo-erosive environment. 3D-stitched C–SiC composites were fabricated using liquid silicon infiltration. The infiltration was carried out... more
Carbon fiber reinforced silicon carbide (C–SiC) composites are promising materials for a severe thermo-erosive environment. 3D-stitched C–SiC composites were fabricated using liquid silicon infiltration. The infiltration was carried out at 1450–1650° C for 10–120min in vacuum. Coefficient of thermal expansion (CTE) of the composites was determined in in-plane and through-thickness directions in the temperature range from room temperature to 1050° C. The in-plane CTE varies in the range (0.5–2)× 10− 6/° C, while that in the ...
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Mathematical modeling of silicon infiltration in porous carboncarbon (CC) preforms is the key to fabricate liquid silicon infiltration based carbonsilicon carbide (CSiC) composite components. Existing models for silicon infiltration... more
Mathematical modeling of silicon infiltration in porous carboncarbon (CC) preforms is the key to fabricate liquid silicon infiltration based carbonsilicon carbide (CSiC) composite components. Existing models for silicon infiltration are based on straight capillaries. For ...
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ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full... more
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ABSTRACT
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Abstract: It is demonstrated, by means of experiments with the basic pancreatic trypsin inhibitor, that the buildup rates of the nuclear Overhauser effect can be measured by two-dimensional NMR spectroscopy. Qualitative correlations... more
Abstract: It is demonstrated, by means of experiments with the basic pancreatic trypsin inhibitor, that the buildup rates of the nuclear Overhauser effect can be measured by two-dimensional NMR spectroscopy. Qualitative correlations between the buildup rates of first-order ...
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ABSTRACT This paper describes an experiment that allows the quantitative measurement of the CSA−CSA cross-correlation between backbone 15N and 13CO nuclei in uniformly enriched proteins. The CSA−CSA cross-correlation is obtained from the... more
ABSTRACT This paper describes an experiment that allows the quantitative measurement of the CSA−CSA cross-correlation between backbone 15N and 13CO nuclei in uniformly enriched proteins. The CSA−CSA cross-correlation is obtained from the cross-peak intensity ratios of the double- and the zero-quantum components observed with a modified triple-quantum 2D CT-HNCO experiment. In addition, the 1HN−15N/1HN−13CO dipole−dipole cross-correlation was measured without relying on resolved scalar couplings using a complementary quantum 2D CT-HNCO experiment. The cross-correlation rates measured for the protein binase (12.3 kDa) were obtained with high precision but show a surprisingly large range of values. Calculations show that this range is at least partially caused by dynamical processes. The potential use of this information to characterize internal anisotropic motion is discussed.
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... R. Rathore, SV Lindeman, AS Kumar, and JK Kochi*. Contribution from the Department of Chemistry, University of Houston, Houston, Texas 77204-5641. J. Am. Chem. Soc. , 1998, 120 (24), pp 60126018. DOI: 10.1021/ja980805v. ...
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In this work, addition of OH(-) to one-electron oxidized thymidine (dThd) and thymine nucleotides in basic aqueous glasses is investigated. At pHs ca. 9-10 where the thymine base is largely deprotonated at N3, one-electron oxidation of... more
In this work, addition of OH(-) to one-electron oxidized thymidine (dThd) and thymine nucleotides in basic aqueous glasses is investigated. At pHs ca. 9-10 where the thymine base is largely deprotonated at N3, one-electron oxidation of the thymine base by Cl(2)(•-) at ca. 155 K results in formation of a neutral thyminyl radical, T(-H)·. Assignment to T(-H)· is confirmed by employing (15)N substituted 5'-TMP. At pH ≥ ca. 11.5, formation of the 5-hydroxythymin-6-yl radical, T(5OH)·, is identified as a metastable intermediate produced by OH(-) addition to T(-H)· at C5 at ca. 155 K. Upon further annealing to ca. 170 K, T(5OH)· readily converts to the 6-hydroxythymin-5-yl radical, T(6OH)·. One-electron oxidation of N3-methyl-thymidine (N3-Me-dThd) by Cl(2)(•-) at ca. 155 K produces the cation radical (N3-Me-dThd(•+)) for which we find a pH dependent competition between deprotonation from the methyl group at C5 and addition of OH(-) to C5. At pH 7, the 5-methyl deprotonated species is found; however, at pH ca. 9, N3-Me-dThd(•+) produces T(5OH)· that on annealing up to 180 K forms T(6OH)·. Through use of deuterium substitution at…