May 27, 2010 - Sexual reproduction depends on the production of haploid gametes, and their fusion to form diploid zygotes. Here, we discuss sperm production and function in a molecular and functional evolutionary context, drawing predominantly from studies in

Helen White-Cooper, Nina Bausek

Jan 1, 1859 - Amorphous starch (including under that term all starch not in the form of the ordinary starch-granule) is rare in the vegetable world. Until the present year Schleiden was the only botanist by whom it had been noticed, and his observations have been

Feb 1, 1932 - The origin of erythrocytes in fishes presents an almost unique problem on account of the different methods of their formation and the varying stages of development at which they are found in the circulation. The general opinion would seem to

Jan 1, 1906 - I have recently pointed out (1) (2) (3) that if a small wound, removing a patch of epidermal cells, is made on the leaf or stem of certain host-plants, and conidia or ascospores of certain species of the Erysiphaceæ are sown on the cells of the

Jan 1, 1877 - Ferns (continued).—Under the name of Rachiopteris corrugata a small stem of a fern is described, the outer surface of the bark of which is corrugated with innumerable transverse ridges and furrows. It has a vascular axis in its centre composed of

Jun 26, 2007 - Here, we review an approach to tissue engineering of functional myocardium that is biomimetic in nature, as it involves the use of culture systems designed to recapitulate some aspects of the actual in vivo environment. To mimic the capillary network

M Radisic, H Park, S Gerecht, C Cannizzaro, R Langer, G Vunjak-Novakovic

Jun 15, 1988 - Genetic linkage analysis with polymorphic DNA markers (restriction fragment length polymorphisms: RFLPS) has allowed the assignment of the cystic fibrosis (CF) locus to the long arm of chromosome 7, within the region of band q31. Two of these markers

May 27, 2010 - The physiological function of spermatogenesis in Caenorhabditis elegans, Drosophila melanogaster and mammals is to produce spermatozoa (1n, haploid) that contain only half of the genetic material of spermatogonia (2n, diploid). This half number of

C. Yan Cheng, Dolores D. Mruk