Randall B
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چکیده
Male infertility has been found to be a major factor in a couple’s inability to conceive in 50% of childless marriages. There are many causes of male infertility including: deficient sperm production, blockage of ducts through which sperm are transported from the testicles, hormonal abnormalities, failure of sperm to mature properly and antisperm antibodies. Varicocele is felt to play a major role in male infertility by mechanisms that will be explained below.
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Short communication: Study on Blennies fishes (Blenniidae Rafinesque 1810) from Makoran coastal waters (Southeast of Iran)
The family blenniidae comprises 58 genera and 406 species according to Eschmeyer and Fong (2018). Members of the family Blenniidae are small, scale-less and very agile fishes, inhabiting inshore, sub-tidal rocky substrata, and rock pools of the inter-tidal zone of tropical and sub-tropical marine waters (Randall, 1995). A few species are also reported from brackish and freshwaters (Hastin...
متن کاملEmployment Creation and Destruction: An Analytical Review
by Randall W. Eberts and Edward B. Montgomery Randall W. Eberts is the executive director of the W.E. Upjohn Institute for Employment Research, Kalamazoo, Michigan, and Edward B. Montgomery is a professor of economics at the University of Maryland and a research associate of the National Bureau of Economic Research. The authors would like to thank Bennett Harrison and Jagadeesh Gokhale for help...
متن کاملThe exchange of oxygen and carbon dioxide across the gills of rainbow trout.
Hughes & Shelton (1962), Hughes (1964) and Rahn (1966) have analysed gas exchange in animals in an aquatic environment, particularly fish, from a theoretical viewpoint. These authors provide equations which permit a quantitative analysis of the gas-exchange process. From these, it is possible to determine the relative effectiveness of the exchange process (Hughes & Shelton, 1962) in a single an...
متن کاملOn the Accuracy of Stable Schemes for 2D Scalar Conservation Laws
We show that any conservative scheme for solving scalar conservation laws in two space dimensions, which is total variation diminishing, is at most first-order accurate.
متن کاملRenal regulation of acid-base balance: ammonia excretion.
tion. The APS Constitution and Bylaws appears in the FASEB Membership Directory. Officers: President, Alfred P. Fishman, University of Pennsylvania Hospital, Philadelphia, PA; President-Elect, John B. West, University of California, La Jolla, CA; Past President, Walter C. Randall, Loyola University, Maywood, IL; Council, Alfred P. Fishman, John B. West, Walter C. Randall, Franklyn G. Knox, Jack...
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