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Summary Digestive juice ofHelix pomatia was studied by immunoelectrophoresis: after incubation with a chromogenic substrate, 5-bromo-4-chloroindol-3-yl--D-galactopyranoside, two-galactosidases were revealed. 相似文献
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Summary The-d-fucosidase and -l-fucosidase activities of digestive juice ofHelix pomatia have been studied.-d-fucosidase can be separated from-d-galactosidase by heat inactivation. 相似文献
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Coppa A Bondioli L Cucina A Frayer DW Jarrige C Jarrige JF Quivron G Rossi M Vidale M Macchiarelli R 《Nature》2006,440(7085):755-756
Prehistoric evidence for the drilling of human teeth in vivo has so far been limited to isolated cases from less than six millennia ago. Here we describe eleven drilled molar crowns from nine adults discovered in a Neolithic graveyard in Pakistan that dates from 7,500-9,000 years ago. These findings provide evidence for a long tradition of a type of proto-dentistry in an early farming culture. 相似文献
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