Wiley

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Nuclear basic protein changes during spermiogenesis in the longnose skate and the spiny dogfish
Wiley - Tập 212 Số 3 - Trang 423-433 - 1980
Niels C. Bols, S.A. Boliska, J. B. Rainville, Harold E. Kasinsky
AbstractNuclear shape and the organization of nuclei within the seminiferous follicles have been used to divide spermiogenesis in the longnose skate, Raja rhina, into eight stages and in the spiny dogfish, Squalus acanthias, into seven stages. Cytochemical techniques for basic proteins reveal that as spermatid n...... hiện toàn bộ
On the diversity of sperm histones in the vertebrates: II. A cytochemical study of the basic protein transitions during spermiogenesis in the cartilaginous fish Hydrolagus colliei
Wiley - Tập 198 Số 1 - Trang 109-113 - 1976
Niels C. Bols, Harold E. Kasinsky
AbstractSpermiogenesis in the ratfish (Hydrolagus colliei) is characterized by unusual changes in the basic proteins of the nucleus. Cytochemical analysis indicates that early spermatids in this cartilaginous fish contain the somatic type of histones. However, late spermatids contain the salmon type of sperm histone whereas spermatozoa di...... hiện toàn bộ
Dynamics of Na+,K+,2Cl− cotransporter and Na+,K+‐ATPase expression in the branchial epithelium of brown trout (Salmo trutta) and atlantic salmon (Salmo salar)
Wiley - Tập 293 Số 2 - Trang 106-118 - 2002
Christian K. Tipsmark, Steffen S. Madsen, Michel Seidelin, Akim Stypinsky Christensen, Christopher P. Cutler, Gordon Cramb
AbstractThe dynamics of branchial Na+,K+,2Cl− cotransporter (NKCC) and Na+,K+‐ATPase (NKA) expression were investigated in brown trout and Atlantic salmon during salinity shifts and the parr‐smolt transformation, respectively. In the brown trout, Western blottin...... hiện toàn bộ
RNA in Cecropia moth ovaries: Sites of synthesis, transport, and storage
Wiley - Tập 170 Số 1 - Trang 1-23 - 1969
Sylvia B. Pollack, William H. Telfer
AbstractAzure B staining of Cecropia moth ovarian follicles indicated that the pattern of RNA concentrations characteristic of vitellogenic oocytes is disrupted by a gross redistribution and dispersion, beginning with the final discharge of the cytoplasm of the nurse cells into the oocyte. The cytoplasmic redistribution is largely complete two days later when chori...... hiện toàn bộ
The regulation of ovulation in the tsetse‐fly, Glossina pallidipes Austen
Wiley - Tập 177 Số 4 - Trang 447-454 - 1971
Thomas R. Odhiambo
AbstractThe tsetse‐fly female matures a single oocyte at a time. It ovulates this into the uterus, where it hatches, develops into a fully‐grown larva, and is later larviposited by the mother. It is only then that the next mature oocyte is ovulated, and the whole sequence is repeated. Thus, in this insect, it is possible to differentiate clearly four processes of e...... hiện toàn bộ
Temperature‐dependent sex determination in crocodilians
Wiley - Tập 270 Số 1 - Trang 28-44 - 1994
Keith A. McGuinness, Harry V. Andrews
AbstractHalf of the 22 extant crocodilians show evidence of temperature‐dependent sex determination (TSD). We examine evidence for TSD in 11 species by reviewing reports on five and presenting new data for six. The female‐male pattern (FM; females at low temperature, males at high temperature) attributed to Alligator mississippiensis and ...... hiện toàn bộ
Effect of exogenous estradiol applied at different embryonic stages on sex determination, growth, and mortality in the leopard gecko (Eublepharis macularius)
Wiley - Tập 268 Số 1 - Trang 17-21 - 1994
Alan Tousignant, David Crews
AbstractTemperature‐dependent sex determination (TSD) occurs in three orders of reptiles. Several studies have examined the ability of estradiol to produce female hatchlings incubated at a male‐producing temperature. The results of these experiments support the idea that estradiol could be used as a powerful tool in the conservation of endangered species with TSD b...... hiện toàn bộ
Evidence for a broadly‐specific, amino acid requiring dehydrogenase at the pyruvate branchpoint in sea anemones
Wiley - Tập 209 Số 1 - Trang 151-159 - 1979
W. Ross Ellington
AbstractThe tissues of a number of species of sea anemones contain an enzyme(s) capable of oxidizing NADH in the presence of pyruvate and either L‐arginine or L‐alanine. The activities using either amino acid coelute on Sephadex G‐100 and DEAE‐Sephadex −50 columns. In addition, the peak DEAE‐Sephadex fractions utilize other amino acids including glycine, lysine and...... hiện toàn bộ
Tissue‐specific alanopine dehydrogenase and strombine dehydrogenase from the sea mouse, Aphrodite aculeata (polychaeta)
Wiley - Tập 225 Số 3 - Trang 369-378 - 1983
Kenneth B. Storey
AbstractEach tissue of the sea mouse, Aphrodite aculeata, contains a single cytoplasmic dehydrogenase acting at the pyruvate branchpoint: Alanopine dehydrogenase (ADH) occurs in longitudinal muscle, nerve, and elytra, and strombine dehydrogenase (SDH) characterizes pharynx and intestine. Lactate and octopine dehydrogenases were not detect...... hiện toàn bộ
The ontogeny of lactate dehydrogenase in the chick cornea
Wiley - Tập 165 Số 2 - Trang 309-315 - 1967
S. Alcorn, H. Maisel
AbstractThe activity of the enzyme lactate dehydrogenase during development of the chick cornea was investigated by starch gel electrophoresis and by spectrophotometric analysis. The isozyme pattern of the cornea prior to the fourteenth day of incubation shows a predominance of LDH 1–3. During subsequent development, there is a marked increase in LDH 4 and 5, so th...... hiện toàn bộ
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