{"refrec":{"BRefID":134366,"RR":"<b>Uhlig, G.</b> (1979). Entwicklung beim Seeigel (<i>Psammechinus miliaris</i>): I. Befruchtung und Furchung. <i>Publ. Wiss. Film, sekt. Biologie 12(23)</i>: 1-19","BEntID":128294,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Publ. Wiss. Film, sekt. Biologie 12(23)</i>: 1-19","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Uhlig, G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Uhlig, G.","Englishabstract":"As an introduction, the sex products of the sea urchin Psammechinus miliaris are shown and morphologically explained. Using the differential interference-contrast technique, one is able to distinguish the penetration of a sperm into an unfertilized egg that immediately reacts with the raising of the fertilization membrane. 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