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human sperm motility stimulating activity of a sulfono glycolipid isolated from Sri Lankan marine red alga Gelidiella acerosa

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Asian Journal of Andrology 2001年第1期3卷 27-31页

作者： G.A.S.Premakumara w.D.Ratnasooriya L.m.V.Tillekeratne A.S.Amarasekare Atta-Ur-Rahman Natural Products Development Group Industrial Technology Institute(CISIR) Colombo 7 Sri LankaDepartment of Zoology Uuiversity of Colombo Colombo 03 Sri LankaChemistry University of Colombo Colombo 03 Sri LankaChemistry University of Colombo Colombo 03 Sri LankaHEJ Research Institute of Chemistry University of Karachi Karachi 32 Pakistan

Aim: To evaluate the sperm motility stimulating activity of a sulfono glycolipid (S-ACT-1) isolated from Gelidiellaacerosa, a Sfi Lankan marine red algae. methods: S-ACT-I, a white amorphous powder was separated from morepolar fractions of the hexane soluble of 1:1 Ch_2Cl_2/meOh extract and subjected to ~1h, ^(13)C NmR and IR Spectroscopyafter reverse phase hPLC for identification. Effects of S-ACT-1 on human sperm motility was assessed in vitro at 10,100 and 1000μg/mL concentrations at 37℃ for 0, 5, 15, 30 and 60 min. Results: S-ACT-1 was identified as aglycolipid sulfate. The lower dose increased the sperm motility slightly, whilst the medium dose significantly increasedthe motility (P m 5 min of incubation reaching a peak at 15 min and the stimulant effect was sustainedthroughout the experimental period. Furthermore, the medium dose rendered 80% of the immotile viable sperm *** contrast, the highest dose impaired the sperm motility. The sperm stimulating activity of S-ACT-1 was dose-depen-dent and had a bell-shaped dose response curve for all the 5 incubation periods. Conclusion: S-ACT-1 of Gelidiellaacerosa is a Sulfono glycolipid. S-ACT-1 has a potent sperm motility stimulating activity in vitro and has the potentialto be developed into a sperm stimulant. (Asian J Androl 2001 mar; 3: 27-31)

关键词： sperm motility stimulants reproduction sulfono glycolipids red alga Gelidiella acerosa

ChARACTERISTICS OF mETAL-hYDROGEN INTERACTION IN hYDROGEN STORAGE ALLOYS

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Acta metallurgica Sinica(English Letters) 2000年第2期13卷 593-599页

作者： m.morinaga and h. Yukawa Department of materials Science and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

The electronic structures are calculated by the DV-Xa molecular orbital method employing small model clusters in order to clarify the roles of the hydride forming elements, A, (e.g., La, Zr Ti, mg) and non-forming elements, B, (e.g., Ni, mn, Fe) in hydrogen storage alloys. It is confirmed from this calculation that hydrogen interacts more strongly with hydride non-forming elements, B, than hydride forming elements, A, in agreement with our previous calculations. however,the B-h interaction is enhanced only when some A element exists in the neighborhood. Otherwise, such a B-h interaction never operates in the alloy. In this sense,the coexistence of A and B elements are essential in the constitution of hydrogen storage alloys. Also, it is shown that the A/B compositional ratio of hydrogen storage alloys is understood in terms of a simple parameter, 2Bo(A - B) / /Bo(A - A)+ Bo(B-B)], where the Bo(A-B), Bo(A-A) and the Bo(B-B) are the bond strengths between atoms given in the parentheses.

关键词： electronic structure hydrogen storage alloy hydride LaNi5 Zrmn2 mg2Ni TiFe

Simultaneous Observation of the Inner and Outer Electron Diffusion Region in Reconnection with Large Guide Field

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Simultaneous Observation of the Inner and Outer Electron Dif...

Effect of grain size on the intrinsic mechanical stability of austenite in transformation-induced plasticity steels:The competition between martensite transformation and dislocation slip

2022年中国地球科学联合学术年会

作者： Z.C.Tian m.Zhou h.Y.man Z.h.Zhong X.h.Deng D.J.Gershman Y.V.Khotyaintsev C.T.Russell Nanchang University School of Physics and materials Science Nanchang University Institute of Space Science and Technology NASA Goddard Space Flight Center Greenbelt

This Letter presents a simultaneous observation of the inner and outer electron diffusion region (EDR) at the dayside magnetopause by the magnetospheric multiscale (mmS) spacecraft. The EDR was observed in an electron-only reconnection with a large guide field. The inner EDR was characterized by positive J?E' while the outer EDR is manifested by negative J?E' and opposite out-of-plane electric field to that in the inner EDR. One pair of the spacecraft detected the inner EDR while the other pair encountered the outer EDR.

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Journal of materials Science & Technology 2023年第31期162卷 38-43页

作者： D.P.Yang T.wang Z.T.miao P.J.Du G.D.wang h.L.Yi State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

The deformation accompanied by austenite to martensite trans-formation was first studied in Fe-Ni alloys,high-mn steels,and austenitic stainless steels with a full austenite *** plasticity of these steels can be improved by the trans-formation during deformation and hence they were named as transformation-induced plasticity(TRIP)steels[1].Over the past few decades,a series of TRIP steels with multiphase microstructure for automotive applications were *** steels contain-ing a certain amount of austenite were called TRIP-assisted steels,such as low-alloy TRIP steels[2],carbide-free bainitic steels[3],δ-TRIP steels[4],quenching and partitioning steels[5],and medium-mn steels[6].The mechanical property of TRIP steels is largely determined by the mechanical stability of austenite[7]which de-pends on the chemical composition[8],grain size[9],orientation[10],and morphology[11]of austenite grains,as well as the nature of neighboring phases[12].In most cases of TRIP-assisted steels,larger austenite grains transform to martensite earlier or faster than smaller austenite grains with the increase of macrostrain[13-18],indicating lower mechanical ***,larger austen-ite grains usually contain less C and mn[13,17-19]and suffer more strain than smaller grains during deformation[20],it doesn’t mean that grain refinement increases the mechanical stability of austen-ite.

关键词： austenite martensite transformation

Generalized Procrustes Analysis and External Preference map Used to Consumer Drivers of Diet Gluten Free Product

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Food and Nutrition Sciences 2016年第9期7卷 711-723页

作者： A. A. mauricio A. B. Palazzo V. m. Caselato h. m. A. Bolini Department of Food and Nutrition School of Food Engineering University of Campinas (UNICAMP) Campinas Brazil

In order to study correlations between sensory properties and acceptance, regular and gluten-free carrot cakes (sweetened with sucrose and sucralose) were evaluated. Appearance, aroma, flavor, texture and overall liking were analyzed by 120 carrot cake consumers using a 9-cm hedonic scale. Quantitative Descriptive Analysis (QDA) was carried out with 11 assessors among 16 attributes. Data were analyzed by ANOVA, Tukey test (p map and Cluster analysis. Also texture parameters were analyzed by Partial Least Square (PLS) to be able to show the instrumental parameters influence. Generalized Procrustes Analysis (GPA) was used before an Ex-ternal Preference mapping to reduce the scale effects and to obtain a consensus configuration. According to PLS correlation, the attributes hardness, fracturability, adhesiveness, chewiness and gumminess interfered on characteristics considered undesirable for texture acceptance and smoothness, elasticity, cohesiveness and water activity interfered as desirable features. It was noted that all cakes were well accepted, except cake sweetened with sucralose and mix done using cornmeal, rice flour, potato starch and corn starch (2:3:3:2). As for the instrumental aspects, cohesiveness and elasticity influenced positively the cake’s acceptance. Instead, smoothness and adhesion parameters weren’t so significant.

关键词： Gluten-Free Correlation Partial Least Square Procrustes

基于深度学习在胸片检测穿刺活检后气胸的临床研究

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国际医学放射学杂志 2022年第4期 479-480页

作者： w.hong E.J.hwang J.h.Lee J.Park J.m.Goo C.m.Park 崔达华

摘要目的基于深度学习的CAD系统能否提高临床中在胸片上检测PTNB后气胸的效能。资料与方法针对使用了在胸片上检测PTNB后气胸的CAD系统，该回顾性队列

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Quantum control of bosonic modes with superconducting circuits

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Science Bulletin 2021年第17期66卷 1789-1805,M0004页

作者： wen-Long ma Shruti Puri Robert J.Schoelkopf michel h.Devoret SmGirvin Liang Jiang State Key Laboratory for Superlattices and microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Pritzker School of molecular Engineering University of ChicagoIllinois 60637USA Department of Applied Physics and Physics Yale UniversityNew HavenConnecticut 06511USA Yale Quantum Institute Yale UniversityNew HavenConnecticut 06511USA

Bosonic modes have wide applications in various quantum technologies,such as optical photons for quantum communication,magnons in spin ensembles for quantum information storage and mechanical modes for reversible microwave-to-optical quantum *** is emerging interest in utilizing bosonic modes for quantum information processing,with circuit quantum electrodynamics(circuit QED)as one of the leading *** information can be encoded into subspaces of a bosonic superconducting cavity mode with long coherence ***,standard Gaussian operations(e.g.,beam splitting and two-mode squeezing)are insufficient for universal quantum *** major challenge is to introduce additional nonlinear control beyond Gaussian operations without adding significant bosonic loss or *** we review recent advances in universal control of a single bosonic code with superconducting circuits,including unitary control,quantum feedback control,drivendissipative control and holonomic dissipative *** approaches to entangling different bosonic modes are also discussed.

关键词： Bosonic modes Circuit QED Unitary dynamics Quantum feedback control Driven-dissipative processes holonomic quantum computation

ACCURATE PREDICTION OF 57FE mSSBAUER PARAmETERS VIA DENSITY FUNCTIONAL ThEORY:PREDICTION OF REACTION INTERmEDIATES AND CATALYTIC CYCLES OF IRON ENZYmES

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ACCURATE PREDICTION OF 57FE MSSBAUER PARAMETERS VIA DENSIT...

Cellular and molecular interactions in neuromuscular junction formation

8th International Symposium on the Industrial Applications of the mossbauer Effect

作者： Jorge h.Rodriguez Theoretical and Computational Biomolecular Physics Group Department of PhysicsPurdue University West Lafayette IN 47907USA

Computational methods of electronic structure can predict the electron density,ρ(r),at the site of Fe nuclei (r = 0) and,therefore,mossbauer isomer shifts(δ)- In addition,one can predict electric field gradient tensors and quadrupole splittings(△).we report the implementation of a computational methodology for the accurate prediction of mossbauer spectral parameters via spin density functional theory(SDFT).Given the crystallographic structure,the method can be applied to

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Cellular and molecular interactions in neuromuscular junctio...