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Пространственная ориентация живых организмов посредством зрительной сенсорной... И все же в последнее время в отношении зрительных пигментов насекомых получено много интересных данных. Так, стало известно, что зрительный пигмент насекомых имеет значительно меньший молекулярный вес (3000-4000), чем молекулярный вес зрительных пигментов позвоночных (27 000-28 000) (Heller, 1969), а следовательно, и диаметр молекулы зрительного пигмента насекомых значительно меньше – около 5 А против 40 – 50 А у позвоночных. Получены доказательства того, что в основе зрения многих насекомых (по-видимому, это справедливо для всех насекомых) лежит ретиналь, который был найден у пчелы, домашней мухи, некоторых прямокрылых, стрекоз, жуков, бабочек (Goldsmi h, 1958; Wolke , Bow ess a. Scheer, 1960; Briggs, 1961). При этом интересно, что Голдсмиту (Goldsmi h, 1958) удалось извлечь зрительный пигмент из сложного глаза пчелы не детергентамп, а простым фосфатным буфером; после освещения раствор зрительного пигмента обесцвечивался, освобождая ретиналь. В 1964 г. Голдсмит и Уорнер (Goldsmi h a. War er, 1964) четко доказали, что зрительная система рабочей пчелы строится на основе витамина А (ретинола); в темноте витамин А окисляется до ретиналя, а на свету ретиналь переходит в витамин А. | |
 Пистолет с мыльными пузырями "Щенячий патруль", со звуком. Пистолет с мыльными пузырями "Щенячий патруль" от компании 1 Toy обязательно порадует поклонников знаменитого одноименного 371 руб Раздел: Щенячий патруль (Paw Patrol)  Универсальные сменные пакеты для дорожного горшка, 15 штук. Отправляясь с ребенком в путешествие, важно позаботиться о том, чтобы под рукой всегда был горшок для малыша. С дорожными горшками 328 руб Раздел: Прочие  Ручка перьевая "Silk Prestige", синяя, 0,8 мм, корпус черный/хром. Перьевая ручка Silk Prestige. Цвет корпуса: черный/хром. Материал корпуса: металл. Материал пера: иридий. 375 руб Раздел: VIP-ручки |  South Africa and the Transvaal warНесмотря на то, что была проведена серьезная работа по восстановлению первоначального качества издания, на некоторых страницах могут обнаружиться небольшие "огрехи": помарки, кляксы и т. п. Книга представляет собой репринтное Creswicke L. Книга по Требованию 1144 руб |  Interrogating War in South Africa, 1939-1945 Gender Under Fire.This work argues that examining the war from the perspective of changing gender roles sheds light not only on civic and family life, but also on the South African state. Suryakanthie C. Книга по Требованию 2625 руб |
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