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196篇 您的检索式:作者名="R.P"
    题名 作者 年代 出处 被引量
1沙丘及风沙土的特征与特性显示文摘Dhir,R.P 程道远 1989世界沙漠研究1989,,1:3
2Carbohydrates mediate sperm-ovum adhesion and triggering of the acrosome reaction显示文摘The fertilization process is the net result of a complex sequence of events that collectively result in the fusion of the opposite gametes. The male gamete undergoes continuous morphological and biochemical modifications during sperm development in the testis (spermatogenesis), maturation in the epididymis, and capacitation in the female reproductive tract. Only the capacitated spermatozoa are able to recognize and bind to the bioactive glycan residue(s) on the ovum's extracellular coat, the zona pellucida (ZP). Sperm-zona binding in the mouse and several other species is believed to take place in two stages. First, capacitated (acrosome-intact) spermatozoa loosely and reversibly adhere to the zona-intact ovum. In the second stage tight irreversible binding occurs. Both types of bindings are attributed to the presence of glycan- binding proteins (receptors) on the sperm plasma membrane and their complementary bioactive glycan units (ligands) on the surface of the ZP. The carbohydrate-mediated adhesion event initiates a signal transduction cascade resulting in the exocytosis of acrosomal contents. This step is believed to be prerequisite which allows the hypemctivated acrosome-reacted spermatozoa to penetrate the ZP and fertilize the ovum. This review focuses on the role of carbohydrate residues in sperm-ovum interaction, and triggering of the acrosome reaction. I have attempted to discuss extensive progress that has been made to enhance our understanding of the well programmed multiple molecular events necessary for successful fertilization. This review will identify these events, and discuss the functional significance of carbohydrates in these events.Daulat R.P 2000Asian Journal of Andrology2000,2,2:2
3Effect of cerium/lanthanum addition on microstructure and mechanical properties of Al7075 alloy via mechanical alloying and sintering显示文摘The effect of the Al-6Ce-3La(ACL) on the microstructural behavior of the Al7075 was investigated. Materials were synthesized by mechanical alloying with variation in the ACL content and milling time. Products were characterized and studied in the as-milled condition and mechanically evaluated after sintering. The synergetic effect of milling time and ACL content in the modified materials led to a reduction in the particle size. Results from electron microscopy showed a homogeneous dispersion of Ce/La phases up to 20 wt.% of ACL content after 10 h of milling. Mechanical evaluation under compressive test showed an improved performance for those alloys reinforced with 0.2 wt.% and 0.5 wt.% of ACL.R.Pérez-Bustamante A.Reyna-Cruz D.C.Acosta-Pena C.R.Santillán-Rodríguez J.A.Matutes-Aquino F.Pérez-Bustamante M.C.Maldonado-Orozco J.Aguilar-Santillán R.Martínez-Sánchez 2016Journal of Rare Earths2016,34,4:2
4Electrical stimulation of red deer ( Cervus elaphus ) carcasses — effects on rate of pH-decline, meat tenderness, colour stability and water-holding capacity显示文摘E Wiklund J.M Stevenson-Barry S.J Duncan R.P Littlejohn 2001Meat Science2001,,2:1
5Report format and task complexity:interaction in risk judgments显示文摘Blocher E Moffie R.P Zmud R.W 0,,06:1
6Goals as reference points显示文摘Heath C Larrick R.P Wu G 0,,01:1
7Velocity relation:Satisfaction as a function of the first derivative of outcome over time显示文摘Hsee C.K Abelson R.P 0,,:1
8查看详情显示文摘Frankenfeld J.W Chan R.P Li N.N 0,,:1
9Investment banking,reputation and the underpricing of initial public offerings显示文摘Beatty R.P Ritter J.R 0,,:1
10Dopamine D4 receptor(D4DR)exon Ⅲ polymorphism associated with the human personality trait of Novelty Seeking显示文摘Ebstein R.P Novick O Umansky R Priel B Osher Y Blaine D...Belmaker R.H 0,,01:1
11The Cognitive Interview method of conducting police interviews:Eliciting extensiveinformation and promoting Therapeutic Jurisprudence显示文摘Fisher R.P Geiselman R.E 0,,:1
12The making of the Machiavellian brain:A structural MRI analysis显示文摘Verbeke W Rietdijk W den Berg W Dietvorst R Worm L & Bagozzi R.P 0,,04:1
13The Elusive Relationship Between Perceived Employment Opportunity and Turnover Behavior:A Methodological or Conceptual Artifact显示文摘Steel R.P Griffeth R.W 0,,06:1
14查看详情显示文摘Schmidt H.K Geiter E Menning M Krug H. Becker C.and Winkler R.P 0,,:1
15Estimating generalizability to a latent variable common to all of a scale's indicators:A comparison of estimators for ωh显示文摘Zinbarg R.E Yovel I Revelle W McDonald R.P 0,,:1
16Association between depressive symptoms and negative dependent life events from late childhood to adolescence显示文摘Johnson D.P Whisman M.A Corley R.P Hewitt J.K & Rhee S.H 0,,:1
17Continuing low colon cancer incidence in African populations显示文摘Isidor Segal Christine A Edwards Alexander R.P Walker 2000The American Journal of Gastroenterology2000,,4:1
18Analytical variation in Australian coals related to coal type and rank显示文摘R.P Suggate 1998International Journal of Coal Geology1998,,3:1
19Relative deprivation,rising expectations,and black militancy显示文摘Abeles R.P 0,,:1
20EUS引导下的Trucut针吸活检:确定自身免疫性胰腺炎是否为梗阻性黄疽的病因Levy M.J Reddy R.P Wiersema M.J 陈云茹 2005世界核心医学期刊文摘(胃肠病学分册)2005,0,8:1
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