Wyniki wyszukiwania - Biblioteka Nauki

1

A review of current treatment strategies based on cisplatin for leishmaniosis

100%

Sachdeva H. , Sharma M.

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2022

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tom 68

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nr 3

2

Structural, optical, electrical and magnetic properties of sol-gel derived Zn1-x-yCoxAlyO films

100%

Sharma M. , Mehra R. M.

Materials Science Poland

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2008

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tom Vol. 26, No. 3

659--673

EN

A detailed study has been presented of optical, electrical, structural and magnetic properties of Zn1.xCoxO (0 < x ≤ 0.25) films co-doped with 1 at. % of Al. The polycrystalline films have been synthesized on Corning glass 7059 substrates by the sol-gel technique using spin coating. Highly preferential c-axis oriented films have been obtained at the annealing temperature of 600 ° C. The lattice constant d of c-axis wurtzite Zn1.x.yCoxAlyO obeys Vegard�fs law for (0 < x ≤ 0.25). The inclusion of Al in ZnO is highly beneficial for the magnetism in ZnO because it enhances the free electron density. Optical spectra measurements reveal that band gap energy exhibits a blue shift upon increasing Co concentration. A positive magnetoresistance for Co doped ZnO and negative magnetoresistance for ZnO without cobalt at 77 K has been observed. The ferromagnetic behaviour has been confirmed by measurements using superconducting quantum interference device. The coercive field and the remanence increase with increase in Co content.

3

Digital image separation algorithm based on joint pdf of mixed images

100%

Wajid M. , Sharma M.

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2015

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tom Vol. 20, no. 1

5--12

EN

In this article, we have presented an algorithm for separating the mixed or fused images. We have considered that the two independent histogram equalized digital images are linearny mixed, and the joint probability density function (PDF) or the scatter plot of the two observed or mixed images is used for separation. The objective and subjective separation results are presented, and observed to be better than the other existing techniques in terms of Peak signal-to-noise ratio (PSNR) and Signal-to-interference ratio (SIR).

4

Synthesis, Characterization and Reactivity of Niobium(V)-2-tert-butylphenoxides

80%

Sharma N. , Sharma M. , Kumari M. , Chaudhry S. C.

Polish Journal of Chemistry

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2009

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tom Vol. 83, nr 9

1565-1573

EN

The niobium(V)-2-butylphenoxides of composition [NbCl(OC6H4C(CH3)3-2)4] (I) and [Nb(OC6H4C(CH3)3-2)5] (II) have been synthesized by the reaction of NbCl5 with Me3SiOC6H4C(CH3)3-2 in CCl4 and have been characterized by elemental analyses, molar conductance, molecular weight determination, IR, 1H and 13C NMR and UV-VIS spectral studies. The molecular model calculations were performed to visualize the probable geometry acquired by the complexes. Based upon spectral and molecular modelling dynamics, a square-pyramidal geometry around niobium in complexes has been proposed. Thermal behaviour of the complexes has been studied by TG, DTA and DSC techniques. The reactions of [NbCl(OC6H4C(CH3)3-2)4] (I) with chloride ion accecptors – FeCl3 and PCl5 have yielded complexes of composition [Nb(OC6H4C(CH3)3-2)4]×[FeCl4] and [Nb(OC6H4C(CH3)3-2)4]×[PCl6] authenticated by physicochemical and IR data.

5

Synthesis, Characterization and Thermal Studies of Niobium(V) Complexes of 2-tert-Butylphenol

80%

Sharma N. , Sharma M. , Kumari M. , Chaudhry S. C.

Polish Journal of Chemistry

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2009

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tom Vol. 83, nr 7

1265-1276

EN

Complexes of composition [NbCl4(OC6H4C(CH3)3-2)] and [NbCl3(OC6H4C(CH3)3-2)2] have been synthesized from the reaction of niobium pentachloride with equimolar and bimolar amounts of 2-tert-butylphenol in carbon tetrachloride. The complexes have been characterized by physicochemical, IR, 1H and 13C NMR and UV-VIS spectral studies. Based upon these studies, for complexes mononuclear square-pyramidal geometry around niobium has been proposed. Thermal decompositional behaviour of the complexes has been studied by TG, DTA and DSC techniques. From TG data, the kinetic and thermodynamic parameters viz. energy of activation, frequency factor, order of reaction, entropy of activation etc. have been evaluated using Freeman-Carroll, Coats-Redfern and Horowitz-Metzger equations. The reactions of complexes with a variety of nitrogenous bases (L1–L5) (where L1 = imidazole, L2 = benzimidazole, L3 = N-methylimidazole, L4 = 2,2'-bipyridyl and L5 = 1,10-phenanthroline) yielded 1:1 addition compounds authenticated by analytical and IR spectral studies.

6

Control of pattern of regenerant differentiation and plantlet production from leaflet segments of Azadirachta indica A. Juss. (neem)

80%

Arora K. , Sharma M. , Sharma A. K.

Acta Physiologiae Plantarum

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2009

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tom 31

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nr 2

EN

A process with controlled pattern of regenerant differentiation from leaflet segments leading to production of cloned plants of a 40-year-old tree of Azadirachta indica was developed.Atwo-step procedure was adopted for containing intervening callusing during regenerant differentiation using modified Murashige and Skoog (MS) medium, where in the first step the explants were subjected to pulse treatments having higher concentration of 6-benzylaminopurine (BAP), while in the second step they were cultured in one-tenth of the initial concentrations of BAP. In the present case, simultaneous differentiation of two types of morphogenetic structures, that is, shoot buds and the meristematic nodules was observed. However, differentiation of higher number of desirable regenerants—the shoot buds and a few meristematic nodules, rather than vice-versa could be controlled by increasing both, the concentration of BAP in pulse treatment and the duration of pulse treatment. In the optimum treatment, where the explants were exposed to 8.88 µM BAP and 81.43 µM adenine hemisulphate for 5 days followed by their transfer to 0.88 µM BAP and 81.43 µM adenine hemisulphate, on an average, 17.4 shoot buds and only 1.6 meristematic nodules were formed from a leaflet. On subculturing, the shoot buds developed into shoots, whereas the meristematic nodules produced three kinds of organized structures that too in varied proportions. Multiplication of shoots was sustained in proliferation medium supplemented with 1.11 µMBAP, 1.43 µMindole-3-acetic acid (IAA) and 135.72 µM adenine hemisulphate. The isolated shoots were rooted and complete plantlets were transferred to potted soil with 100% survival.

7

Estimating parameters of empirical infiltration models from the global dataset using machine learning

80%

Kim S. , Karahan G. , Sharma M. , Pachepsky Y.

International Agrophysics

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2021

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tom 35

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nr 1

8

Radiation effect on MHD blood flow through a tapered porous stenosed artery with thermal and mass diffusion

80%

Sharma M. , Gaur R. K. , Sharma B. K.

International Journal of Applied Mechanics and Engineering

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2019

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tom Vol. 24, no. 2

411--423

EN

A mathematical model for MHD blood flow through a stenosed artery with Soret and Dufour effects in the presence of thermal radiation has been studied. A uniform magnetic field is applied perpendicular to the porous surface. The governing non-linear partial differential equations have been transformed into linear partial differential equations, which are solved numerically by applying the explicit finite difference method. The numerical results are presented graphically in the form of velocity, temperature and concentration profiles. The effects of various parameters such as the Reynolds number, Hartmann number, radiation parameter, Schmidt number and Prandtl number, Soret and Dufour parameter on the velocity, temperature and concentration have been examined with the help of graphs. The present results have an important bearing on the therapeutic procedure of hyperthermia, particularly in understanding/regulating blood flow and heat transfer in capillaries.

9

Mathematical modeling of magneto pulsatile blood flow through a porous medium with a heat source

80%

Sharma B. K. , Sharma M. , Gaur R. K. , Mishra A.

International Journal of Applied Mechanics and Engineering

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2015

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tom Vol. 20, no. 2

385--396

EN

In the present study a mathematical model for the hydro-magnetic non-Newtonian blood flow in the non-Darcy porous medium with a heat source and Joule effect is proposed. A uniform magnetic field acta perpendicular to the porous surface. The governing non-linear partial differential equations have been solved numerically by applying the explicit finite difference Method (FDM). The effects of various parameters such as the Reynolds number, hydro-magnetic parameter, Forchheimer parameter, Darcian parameter, Prandtl number, Eckert number, heat source parameter, Schmidt number on the velocity, temperature and concentration have been examined with the help of graphs. The present study finds its applications in surgical operations, industrial material processing and various heat transfer operations.

10

Coordination behaviour of biologically active Shiff bases of amino acids towards stannous ion

80%

Singh H. L. , Sharma M. , Gupta M. K. , Varshney A. K.

Bulletin of the Polish Academy of Sciences. Chemistry

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1999

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tom Vol. 47, No. 2

103-110

EN

Reaction of tin (II) methoxide with Schiff bases derived by condensation of 2-hydroxy-1-naphthaldehyde, salicylaldehyde with glycine, b-alanine, a-valine, a-iso-leucine and a-tryptophan in 1:1 molar ratio gives a new series of tin(II) complexes. The complexes are monomeric and of non-electrolytic nature. The coordination behaviour of Schiff bases through phenolic and acidic oxygens and azomethine nitrogen towards tin atom has been investigated by infrared and multinuclear magnetic resonance (1 H, 130 and 119Sn) spectral studies. Schiff bases and their tin complexes have also been screened for their antifungal and antibacterial activities as several fungi and bacteria are found quite active in this respect.

11

A comprehensive review of renewable energy production from biomass-derived bio-oil

80%

Sharma M. , Singh J. , Baskar C. , Kumar A.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2019

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tom 100

|

nr 2

12

Influence of particle size on physical and sensory attributes of mango pulp powder

71%

Sharma M. , Kadam D. M. , Chadha S. , Wilson R. A. , Gupta R. K.

International Agrophysics

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2013

|

tom 27

|

nr 3

13

Immediate effects of kinesio-taping and joint mobilisation on shoulder in over-head athletes with glenohumeral internal rotation deficit

71%

Singh A. , Makhijani Y. , Sharma M. , Shenoy S. , Sandhu J.

Central European Journal of Sport Sciences and Medicine

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2023

|

tom 42

|

nr 02

14

Characteristics of aerosol optical depth and Ångström parameters over Mohal in the Kullu Valley of Northwest Himalayan Region, India

71%

Sharma N. L. , Kuniyal J. C. , Singh M. , Sharma M. , Guleria R. P.

Acta Geophysica

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2011

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tom Vol. 59, no. 2

334-360

EN

The measurements using a ground based multi wavelength radiometer (MWR) at Mohal (31°54’N, 77°07’E, 1154 m AMSL) in the Kullu valley of Northwestern Himalayan region show that the spectral aerosol optical depth (AOD) and turbidity coefficient, ß, are high in summer, moderate in monsoon season, low in winter and lowest in autumn, while wavelength exponent, α, has an opposite trend. Average annual value of AOD at 500 nm is 0.24±0.01, 0.43±0.02, and 0.28±0.02; that of β is 0.14±0.01, 0.22±0.02, and 0.17±0.03; and that of α is 1.06±0.09, 1.16±0.10, and 0.86±0.13, respectively, for clear, hazy and partially clear sky days. The considerably greater value of β on hazy days indicates more coarse particles in mountain haze. The fractional asymmetry factor (AF) is more negative in summer and autumn months. The AOD and β have significantly positive correlation with temperature and wind speed, suggesting high AODs and turbidity on hot and windy days.

15

Fenugreek (Trigonella foenum-graecum L.) seed: a review of physiological and biochemical properties and their genetic improvement

41%

Zandi P. , Basu S. K. , Khatibani L. B. , Balogun M. O. , Aremu M. O. , Sharma M. , Kumar A. , Sengupta R. , Li X. , Li Y. , Tashi S. , Hedi A. , Cetzal-Ix W.

Acta Physiologiae Plantarum

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2015

|

tom 37

|

nr 01

EN

Discovering the complexity of seed structure and function along with a number of vital processes such as seed growth and development, germination are important factors in unlocking the secrets of consistent crop yield. Fenugreek (Trigonella foenum-graecum L.), a multi-purpose annual, dryland-adapted, forage, legume crop is cultivated in different parts of the world with great potential for introduction under suitable agro-climatic zones in sub-Saharan Africa and Latin America. Fenugreek seed is used extensively for its medicinal, pharmaceutical and nutraceutical properties. It is effective in the treatment of diabetes, hyperglycaemia (thyroxine-induced type) and hypercholesterolemia. This review discusses seed physiological processes and several important biochemical seed constituent, e.g., steroidal sapogenins (diosgenin), polysaccharide fiber (galactomannan), amino acid (4-hydroxyisoleucine), etc, with important medicinal and pharmacological characteristics impacting human and animal health. However, there are noticeable differences in the quality of several phytochemicals found in fenugreek seed possibly due to variations in plant genotypes and agroclimatic conditions under which the crop is grown. Hence, it is important to note that for consistent seed yield and quality of fenugreek cultivars there is an urgent need for continuing efforts in genetic improvements and in developing high yielding, disease and drought-resistant varieties suitable for different agro-climatic conditions. Therefore, in addition to the physico-biochemistry of fenugreek seed different approaches for genetic improvement have also been discussed.

16

Challenges and opportunities for the future of icampuses

41%

Thomas A. M. , Shah H. , Moore P. , Evans C. , Sharma M. , Pham H. V. , Osman K. , Wilcox A. J. , Rayson P. , Chapman C. , Chima P. , Athwal C. , While D.

Computer Science

|

2013

|

tom Vol. 14 (1)

5--25

EN

Meeting the educational needs of students currently requires moving toward collaborative electronic and mobile learning systems that parallel the vision of Web 2.0. However, factors such as data freedom, brokerage, interconnectivity and the Internet of Things add to a vision for Web 3.0 that will require consideration in the development of future campus-based, distance and vocational study. So, education can, in future, be expected to require deeper technological connections between students and learning environments, based on significant use of sensors, mobile devices, cloud computing and rich-media visualization. Therefore, we discuss challenges associated with such a futuristic campus context, including how learning materials and environments may be enriched by it. As an additional novel element the potential for much of that enrichment to be realized through development by students, within the curriculum, is also considered. We will conclude that much of the technology required to embrace the vision of Web 3.0 in education already exists, but that further research in key areas is required for the concept to achieve its full potential.