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418篇 您的检索式:作者名="Chandra V"
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1Effect of fluence and ambient environment on the surface and structural modification of femtosecond laser irradiated Ti显示文摘Under certain conditions, ultrafast pulsed laser interaction with matter leads to the formation of self-organized conical as well as periodic surface structures(commonly reffered to as, laser induced periodic surface structures, LIPSS). The purpose of the present investigations is to explore the effect of fsec laser fluence and ambient environments(Vacuum &O_2) on the formation of LIPSS and conical structures on the Ti surface. The surface morphology was investigated by scanning electron microscope(SEM). The ablation threshold with single and multiple(N = 100) shots and the existence of an incubation effect was demonstrated by SEM investigations for both the vacuum and the O_2 environment. The phase analysis and chemical composition of the exposed targets were performed by x-ray diffraction(XRD) and energy dispersive x-ray spectroscopy(EDS), respectively. SEM investigations reveal the formation of LIPSS(nano & micro). FFT d-spacing calculations illustrate the dependence of periodicity on the fluence and ambient environment. The periodicity of nano-scale LIPSS is higher in the case of irradiation under vacuum conditions as compared to O_2. Furthermore, the O2 environment reduces the ablation threshold. XRD data reveal that for the O_2 environment, new phases(oxides of Ti) are formed. EDS analysis exhibits that after irradiation under vacuum conditions, the percentage of impurity element(Al) is reduced. The irradiation in the O_2 environment results in 15% atomic diffusion of oxygen.Umm-i-Kalsoom Shazia Bashir Nisar Ali M Shahid Rafique Wolfgang Husinsky Chandra S R Nathala Sergey V Makarov Narjis Begum 2016Chinese Physics B2016,25,1:2
2Morpho-anatomical and physicochemical studies of Fumaria indica(Hausskn.)Pugsley显示文摘Objective:To study morpho-anatomical characters and physicochemical analysis of Fumaria indica(F.indica)(Hausskn.)Pugsley,(Fumariaceae),an important medicinal plant used extensively for treating a variety of ailments in various system of indigenous medicine.Methods:Evaluation of the different parts of the plant was carried out to determine the morphoanatomical,physicochemical,phytochemical and HPTLC fingerprinting profile of F.indica and other WHO recommended methods were performed for standardization.Results:Morphoanatomical studies showed compound and pinnatifid leaf,4 to 6 cm in length,linear and oblong in shape and anomocytic arrangement of stomata,thin walled parenchymatous cells,scattered,sclerenchymatous,capped vascular bundles and radiating medullary rays.Physicochemical studies showed foreign matter 0.2%,loss on drying 6.8%,total ash 16.77%,alcohol and water soluble extractives 8.92%and 20.26%,respectively,sugar 17.75%,starch 22.97%and tannins 2.37%.Phytochemical evaluation revealed the presence of carbohydrate,alkaloids,flavonoids,saponins,tannins and sterol.Thin layer chromatography was carried out with different solvents and the best solvent system was chloroform and methanol in 80:20 ratio and revealed 12 spots with different R_f value under UV light 366λ.Conclusions:The results of the study can serve as a valuable source of information and provide suitable standards for identification of this plant material for future investigations and applications.Prakash Chandra Gupta Ch V Rao 2012Asian Pacific Journal of Tropical Biomedicine2012,2,10:2
3Deciphering the modifiers for phenotypic variability of X-linked adrenoleukodystrophy显示文摘X-linked adrenoleukodystrophy(X-ALD),an inborn error of peroxisomalβ-oxidation,is caused by defects in the ATP Binding Cassette Subfamily D Member 1(ABCD1)gene.X-ALD patients may be asymptomatic or present with several clinical phenotypes varying from severe to mild,severe cerebral adrenoleukodystrophy to mild adrenomyeloneuropathy(AMN).Although most female heterozygotes present with AMN-like symptoms after 60 years of age,occasional cases of females with the cerebral form have been reported.Phenotypic variability has been described within the same kindreds and even among monozygotic twins.There is no association between the nature of ABCD1 mutation and the clinical phenotypes,and the molecular basis of phenotypic variability in X-ALD is yet to be resolved.Various genetic,epigenetic,and environmental influences are speculated to modify the disease onset and severity.In this review,we summarize the observations made in various studies investigating the potential modifying factors regulating the clinical manifestation of X-ALD,which could help understand the pathogenesis of the disease and develop suitable therapeutic strategies.Shruti V Palakuzhiyil Rita Christopher Sadanandavalli Retnaswami Chandra 2020World Journal of Biological Chemistry2020,11,3:2
4A review on ethnobotany,phytochemistry and pharmacology of Fumaria indica(Fumitory)显示文摘Fumaria indica(Hausskn.) Pugsley(Fumariaceae),known as 'Fumitory',is an annual herb found as a common weed all over the plains of India and Pakistan.The whole plant is widely used in traditional and folkloric systems of medicine.In traditional systems of medicine,the plant is reputed for its anthelmintic,diuretic,diaphoretic,laxative,cholagoguc,stomachic and sedative activities and is used to purify blood and in liver obstruction in ethnopharmacology. The whole plant is ascribed to possess medicinal virtues in Ayurvedic and Unani systems of medicine and is also used in preparation of important Ayurvedic medicinal preparations and polyhedral liver formulations.The review reveals that phytochemical constituents of wide range have been separated from the plants and it possesses important pharmacological activities like smooth muscle relaxant,spasmogenic and spasmolytic,analgesic,anti-inflammatory, neuropharmacological and antibacterial activities.The separation of hepatoprotective and antifungal constituents from this plant was also reported newly.This review highlights the traditional,ethnobotanical,phytochemical,pharmacological information available on Fumaria indica,which might be helpful for scientists and researchers to find out new chemical entities responsible for its claimed traditional uses.Prakash Chandra Gupta Nisha Sharma Ch V Rao 2012Asian Pacific Journal of Tropical Biomedicine2012,2,8:2
5Crystal doping aided by rapid expansion of supercritical solutions 显示文摘Chandra V Matthew J M Thomas E N 2002AAPS Pharm-SciTech2002,3,4:1
6Conditions associated with Alzheimer's disease at death:case-control study显示文摘Chandra V Bharucha NE Schoenberg BS 1986Neurology1986,36,2:1
7Structure of the Intact PPARY-RXR-a Nuclear Receptor Complex on DNA显示文摘Chandra V Huang P X Hamuro Y 2008Nature2008,456,:1
8Diagnostic modalities for gas- tro-esophageal reflux in infantile wheezers显示文摘Patra S Singh V Chandra J 2011J Trop Pediatr2011,57,2:1
9Cholecystokinin and gastrin receptors targeting in gastrointestinal cancer 显示文摘Rai R Chandra V Tewari M 2012Surg Oncol2012,,4:1
10Statistical optimization of medium components for enhanced riboflavin production by a UV-mutant of Eremothecium ashbyii显示文摘 CHANDRA T S 2000Process Biochem2000,36,:1
11Case-control study of late onset'probable Alzheimer's disease'显示文摘Chandra V 1987Neurology1987,37,8:1
12Pressure induced structural transformation of pyrochlore Gd2Zr2O7 显示文摘Kumar n r Chandra n v Shekar c 2008Solid State Commun2008,147,35:1
13A novel structure for three-phase four-wire distribution system utilizing UPQC显示文摘Khadkikar V Chandra A 0,,05:1
14Structure of the intact PPARa RXR nuclear receptor complex on DNA 显示文摘Chandra V Huang P Hamuro Y 2008Nature2008,456,35:1
15Multidomain integration in the structure of the HNF4α nuclear receptor eomplex显示文摘Chandra V Hang P Potluri N Wu D Kim Y Rastinejad F 2013Nature2013,495,:1
16Graphene-SnO, composites for highly efficient photocatalytic degradation of methylene blue under sunlight显示文摘Seema H Kemp K C Chandra V et a1 2012Nanotechnology2012,23,35:1
17Activities of cellulase and amylase in soils as influenced by insecticide interactions 显示文摘Gundi V A Viswanath Chandra M S 2007Ecotoxicology and Environmental Safety2007,68,2:1
18Alcohol and tobacco consumption as risk factors for Alzheimer's disease:a collaborative re-analysis of case control studies显示文摘GRAVES AB VAN DUIJIN CM CHANDRA V 1991Int J Epidemiol1991,20,2:1
19Engineering behavior of fiber-reinforced pond ash and silty sand 显示文摘Kumar R Kanaujia V K Chandra D 1996Geosynthetics International1996,6,:1
20Therapeu- tic potential of canine bone marrow derived mesenchymal stem cells and its conditioned media in diabetic rat wound healing显示文摘Ansari MM Sreekumar TR Chandra V 2013J Stem Cell Res Ther2013,3,:1
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