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Theoretical study of differential cross sections for the ionization of helium by fast proton impact

Chinese Physics B 2024年第11期33卷 255-264页

作者： M Mondal B Mandal T Mistry d jana M Purkait department of Physics Ramakrishna Mission Residential CollegeNarendrapurKolkata-700103India

We present the angular distribution of the ejected electron for single ionization of He by fast proton impact.A fourbody formalism of the three-Coulomb wave is applied to calculate the triple differential cross sections at several impact energies in the scattering,perpendicular and azimuthal ***,the three-body formalism of three-Coulomb,two-Coulomb and first Born approximation models has also been used to study the many-body effect on electron emission and the validity of the *** the three-Coulomb wave model,the final state wave function incorporates distortion due to the three-body mutual Coulombic *** this formalism,we use an uncorrelated and correlated Born initial state,which consists of a plane wave for the incoming projectile times a two-electron bound state wavefunction of the helium atom representing the 1s2(1S)***,in the case of the three-body formalism,the initial state wavefunction consists of a long-range Coulomb distortion for the incoming projectile and one active electron of the He atom described by the Roothaan–Hartree–Fock *** structure with a single or two peaks with unequal intensity is observed in the angular distributions of the triple differential cross sections for the different kinematic *** addition,the influence of static electron correlations is investigated using different bound state wavefunctions for the ground state of the He *** the four-body formalism,the present computations are very fast by reducing a nine-dimensional integral to a two-dimensional real *** the simplicity and speed of the proposed quadrature,the comparison shows that the obtained results are in reasonable agreement with the experiment and are compatible with those of other theories.

关键词： ionization cross sections collision atoms ions

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Trilayer anisotropic structure versus randomly oriented structure in heart valve leaflet tissue engineering

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Bio-design and Manufacturing 2023年第4期6卷 423-438页

作者： Yuriy Snyder Soumen jana department of Bioengineering University of MissouriColumbiaMO 65211USA

It has been hypothesized that leaflet substrates with a trilayer structure and anisotropicmechanical properties could be useful for the production of functional and long-lasting tissue-engineered *** investigate the influence of the anisotropic structural and mechanical characteristics of a substrate on cells,in this study,we electrospun trilayer anisotropic fibrous substrates and randomly oriented isotropic fibrous substrates(used as controls)from polycaprolactone ***,the random substrates had higher radial and lower circumferential tensile properties than the trilayer substrates;however,they had similar flexural *** valvular interstitial cells cultured on both substrates produced random and trilayer cell-cultured constructs,*** trilayer cell-cultured constructs had more anisotropic mechanical properties,17%higher cellular proliferation,14%more extracellular matrix(i.e.,collagen and glycosaminoglycan)production,and superior gene and protein expression,suggesting that more cells were in a growth state in the trilayer constructs than in the random ***,the random and radial layers of the trilayer constructs had more vimentin,collagen,transforming growth factor-beta 1(TGF-ß1),transforming growth factor-beta 3(TGF-ß3)gene expression than in the circumferential layer of the *** study verifies that the differences in structural,tensile,and anisotropic properties of the trilayer and random substrates influence the characteristics of the cells and ECM in the constructs.

关键词： Heart valve leaflet Trilayer Tissue engineering Fiber Electrospinning

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Basic theorem as representation of heterogeneous concept lattices

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Frontiers of Computer Science 2015年第4期9卷 636-642页

作者： Jozef POCS jana POCSOVA Palacky University Olomouc Department of Algebra and Geometry Olomouc 779 00 Czech Republic Mathematical Institute Slovak Academy of Sciences Kosice 040 01 Slovakia Technical University of Kosice BERG Faculty Institute of Control and Informatization of Production Processes Ko~ice 043 84 Slovakia

We propose a method for representing heteroge- neous concept lattices as classical concept lattices. Particu- larly, we describe a transformation of heterogeneous formal context into a binary one, such that corresponding concept lattices will be isomorphic. We prove the correctness of this transformation by the basic theorem for heterogeneous as well as classical concept lattices.

关键词： basic theorem heterogeneous concept lattice,representation

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Effect of Stephania hernandifolia leaf extract on testicular activity in rats

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Asian Journal of Andrology 2003年第2期5卷 125-129页

作者： d.jana R.Maiti d.Ghosh Reproductive Endocrinology and Family Welfare Research Unit Department of Human Physiology with Community Health Vidyasagar University Midnapore 721 102 West Bengal India

Aim: The testicular inhibitory effect of the aqueous fraction of methanol extract of Stephania hernandifolia leaf was studied in male Wistar rats. Methods: The supernatent and the precipitate part of aqueous fractions of the methanol extract of the leaf were gavaged separately to rat at a similar dose of 200 mg/mL per 100 g body weight per day for 28 days. After cessation of treatment, various observations were conducted. Results: In both treated groups, there were significant decreases in the relative weights of the sex organs, the testicular key androgenic enzymes activities, the plasma level of testosterone, the number of different germ cells at stage VII of seminiferous epithelial cell cycle and the seminiferous tubular diameter in comparison to the controls. Neither of the parts had somatic, renal and hepatic toxicity. This study suggested that the active molecules present in the aqueous fraction of methanol extract of Stephania hemandifolia leaves might be steroids as indicated by thin layer chromatography using specific staining substance for steroid molecules. Conclusion: In rats, the aqueous fraction of methanol extract of the 5. hemandifolia leaves possesses certain testis-inhibitory substances, which may be steroid-like agents.

关键词： Stephania hernandifolia androgens enzymes testosterone germ cells

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Preparation of LdPE-Acetylated/Butyrylated Starch Blend Blow Films and Characterization

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Chinese Journal of Polymer Science 2014年第3期32卷 268-279页

作者： Sangeeta Garg Asim Kumar jana department of Chemical Engineering National Institute of TechnologyJalandhar department of Biotechnology National Institute of TechnologyJalandhar

development of modified plastics has been studied through the LdPE-acylated starch blend films to examine the effect of different acyl groups and degrees of substitution （dS） on properties of films. Corn starch was modified with acetyl and hutyryl groups and films were prepared by blending acylated starch with low density polyethylene （LdPE）. Systematic studies were done to observe the effect of acyl groups, dS and starch concentration on the properties and biodegradability of the blend films. It was observed that blend films containing 5% acetylated and butyrylated starches of high dS （2.5, 1.7） maintained 75% and 83% of tensile strength of LdPE films. Thermal analysis results indicated that acetylated and butyrylated starch blend films decomposed at 370℃ and 389℃ which were higher than the decomposition temperature of native starch film （349℃）. Scanning electron micrographs of blend films containing high dS acylated starch showed well dispersed starch particles due to improvement in dispersion between starch and LdPE. Water absorption capacity of high dS acetylated and butyrylated starch blend films （4.18% and 3.76%, respectively） was lower than that of native starch films （5%）. This study has an advantage because of blown films prepared can be integrated with the present manufacturing systems without any other requirement.

关键词： Acylated starch LdPE-starch blend films Mechanical properties Water absorption capacity Biodegradability.

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Entropy analysis of unsteady magneto-nanofluid flow past accelerating stretching sheet with convective boundary condition

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Applied Mathematics and Mechanics(English Edition) 2015年第12期36卷 1593-1610页

作者： S.dAS S.CHAKRABORTY R.N.jana O.d.MAKINdE department of Mathematics University of Gour Banga department of Applied Mathematics Vidyasagar University Faculty of Military Science Stellenbosch University

The unsteady laminar magnetohydrodynamics （MHd） boundary layer flow and heat transfer of nanofluids over an accelerating convectively heated stretching sheet are numerically studied in the presence of a transverse magnetic field with heat source/sink The unsteady governing equations are solved by a shooting method with the Runge-Kutta- Fehlberg scheme. Three different types of water based nanofluids, containing copper, aluminium oxide, and titanium dioxide, are taken into consideration. The effects of the pertinent parameters on the fluid velocity, the temperature, the entropy generation num- ber, the Bejan number, the shear stress, and the heat transfer rate at the sheet surface are graphically and quantitatively discussed in detail. A comparison of the entropy generation due to the heat transfer and the fluid friction is made with the help of the Bejan number. It is observed that the presence of the metallic nanoparticles creates more entropy in the nanofluid flow than in the regular fluid flow.

关键词： unsteady MHd flow nanofluid heat source/sink entropy generation Bejan number

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Evaluation of the expression of sperm proteins in normozoospermic and asthenozoospermic men using monoclonal antibodies

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Asian Journal of Andrology 2016年第1期18卷 108-113页

作者： jana Capkova Alena Kubatova Lukas ded Olina Tepla jana Peknicova Laboratory of Reproductive Biology Institute of Biotechnology Academy of Sciences of the Czech Republic v. v. i. Prague Czech Republic Clinic Center IVF ISCARE Prague Czech Republic

Recent studies have shown that infertility affects estimated 15% of all couples. Male infertility is the primary or contributory cause in 60% of these cases. Consequently, the application of assisted reproduction is increasing. These methods could benefit from an extended evaluation of sperm quality. For this reason, we analyzed sperm proteins from 30 men with normal spermiograms and 30 men with asthenozoospermia. Ejaculates of both groups were tested by flow cytometry （FCM） and fluorescence with a set of well-characterized anti-human sperm Hs-monoclonal antibodies （MoAbs）, which were generated in our laboratory. No statistically significant differences were found between normospermics and asthenospermics in the expression of the sperm surface protein clusterin, evaluated with Hs-3 MoAb, and semenogelin, evaluated with Hs-9 MoAb. However, FCM revealed quantitative differences in the acrosomal proteins between normozoospermic and asthenozoospermic men, namely, in glyceraldehyde-3-phosphate dehydrogenase, evaluated with Hs-8 MoAb, valosin-containing protein, evaluated with Hs-14 MoAb, and ATP synthase （cAMP-dependent protein kinase II, PRKAR2A）, evaluated with MoAb Hs-36. Asthenozoospermic men displayed a highly reduced expression of intra-acrosomal proteins, with a likely decrease in sperm quality, and thus a negative impact on successful reproduction. Asthenozoospermia seems to be a complex disorder involving intra-acrosomal proteins.

关键词： asthenozoospermia flow cytometry fluorescence microscopy monoclonal antibodies sperm proteins

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Microtubule affinity regulating kinase(MARK/Par1)isoforms differentially regulate Alzheimer-like TAU missorting and Aβ-mediated synapse pathology

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Neural Regeneration Research 2023年第2期18卷 335-336页

作者： jana Chudobová Hans Zempel Institute of Human Genetics Faculty of Medicine and University Hospital Cologne Center for Molecular Medicine Cologne(CMMC) University of CologneCologneGermany

Importance of TAU protein for dementia syndromes:dementia currently affects about 55 million people worldwide,with Alzheimer's disease(Ad)being the most prevalent *** one crucial pathological hallmark of Ad that correlates best with loss of synapses and cognitive decline are the so-called intracellular neurofibrillary tangles composed of mislocalized/missorted and hyperphosphorylated TAU protein(Naseri et al.,2019).Many other neurodegenerative diseases,both genetic and nongenetic,are characterized by neurofibrillary ta ngles or pathological accumulation of the protein TAU and are thus termed"tauopathies".

关键词： Alzheimer diseases

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Expanding through the Emerald Isle:exploration and spatial orientation of non-native bank voles in Ireland

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Current Zoology 2024年第3期70卷 320-331页

作者： Valeria Mazza jana A.Eccard Animal Ecology Institute for Biochemistry and BiologyUniversity of PotsdamMaulbeerallee 114469PotsdamGermany and department of Ecological and Biological Sciences University of TusciaLargo dell'Università10100 ViterboItaly

Whether introduced into a completely novel habitat or slowly expanding their current range,the degree to which animals can effciently explore and navigate new environments can be key to survival,ultimately determining population establishment and colonization *** tested whether spatial orientation and exploratory behavior are associated with non-native spread in free-living bank voles(Myodes glareolus,N=43)from a population accidentally introduced to Ireland a century *** measured spatial orientation and navigation in a radial arm maze,and behaviors associated to exploratory tendencies and risk-taking in repeated open-feld tests,at the expansion edge and in the source *** voles at the expansion edge re-visited unrewarded arms of the maze more,waited longer before leaving it,took longer to start exploring both the radial arm maze and the open feld,and were more risk-averse compared to conspecifcs in the source *** together,results suggest that for this small mammal under heavy predation pressure,a careful and thorough exploration strategy might be favored when expanding into novel environments.

关键词： animal personality biological invasions exploration behavior Myodes glareolus range expansion spatial orientation.

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Compromising Solution of Geometric Programming Problem with Bounded Parameters

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Journal of the Operations Research Society of China 2017年第3期5卷 377-390页

作者： Mrinal jana Geetanjali Panda University of Petroleum and Energy Studies Dehradun 248007India department of Mathematics Faculty of MathematicsIndian Institute of Technology KharagpurKharagpur 721302West BengalIndia

This paper addresses a geometric programming problem,where the objective function and constraints are interval-valued *** concept of acceptable feasible region is introduced,and a methodology is developed to transform this model to a general optimization problem,which is free from interval ***ship between the solution of the original problem and the transformed problem is *** methodology is illustrated through numerical *** by the proposed method and previous methods are analyzed.

关键词： Interval-valued function Partial ordering Nonlinear programming Geometric programming decision making

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