Reference

Degeneration of archenteron in sea urchin embryos caused by a,a'-dipyridyl

Degeneration of archenteron in sea urchin embryos caused by a,a'-dipyridyl. Mizoguchi, Hazime; Fujiwara, Akiko; Yasumasu, Ikuo (Sch. Educ., Waseda Univ., Tokyo, Japan). Differentiation (Berlin), 25(2), 106-12 (English) 1983. CODEN: DFFNAW. ISSN: 0301-4681. DOCUMENT TYPE: Journal CA Section: 12 (Nonmammalian Biochemistry) Degeneration of the archenteron in the sea urchin (Hemicentrotus pulcherrius and Pseudocentrotus depressus) middle gastrulae occurred in the presence of a,a'-dipyridyl or Zn2+, inhibitors of prolyl hydroxylase. In the presence of these substances the archenteron degenerated and was eventually destroyed. Adding Fe2+ to the embryo culture contg. a,a'-dipyridyl protected the archenteron from further degeneration, but the collapsed archenteron was not restored to the upright position. At the late gastrula stage, a,a'-dipyridyl did not cause the degeneration of the archenteron. Treatment of the embryos with a,a'-dipyridyl, starting at the swimming blastula stage, resulted in the prodn. of many mesenchyme-like cells but an archenteron was not produced in the embryos.There are some commonly used reagents with their cas registry numbers 366-18-7 and 7440-66-6 in this article. Addn. of Fe2+ to an a,a'-dipyridyl culture, just before the beginning of gastrulation of normal embryos, resulted in the formation of a normal archenteron. a,a'-Dipyridyl inhibited hydroxylation of proline residues of collagen in sea urchin embryos and Fe2+ prevented the inhibition by a,a'-dipyridyl. Respiration was not inhibited by a,a'-dipyridyl. .

Zinc electrodes for secondary alkaline batteries

Zinc electrodes for secondary alkaline batteries. (Furukawa Battery Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58119159 A2 15 Jul 1983 Showa, 2 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: H01M004-42. APPLICATION: JP 82-2153 9 Jan 1982. DOCUMENT TYPE: Patent CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) The title electrodes are prepd. from a Zn-based mixt. contg. 2-10 at.% Cu. Thus, a mixt. of ZnO 100, Ca(OH)2 12, PTFE 6, CuO 6 g, and water was heat treated, filled into a core sheet, and conversion treated to prep. a Zn anode for a Ni-Zn battery. The addn. of Cu increased the battery cycle life.Except for chemicals metioned above, 7440-50-8 and 7440-66-6 are also used. .