Since the year 1939, when preparations of protein digests became generally available in America, reports of investigations designed to test their value in the parenteral feeding of infants have appeared from time to time. ' Amigen,' an enzymic digest of hydrolysed casein, is one of these preparations. Shohl, Butler, Blackfan, and McIlan (1939), using ' amigen ' as the sole source of nitrogen in...

Identification and functional analysis of key members of bacterial communities in marine and estuarine environments are major challenges for obtaining a mechanistic understanding of biogeochemical processes. In the Baltic Sea basins, as in many other marine environments with anoxic bodies of water, the oxic-anoxic interface is considered a layer of high bacterial turnover of sulfur, nitrogen, a...

Elemental balances for carbon and nitrogen in an open-shore population of the bivalve mollusc Mytilus edulis underwent seasonal changes more characteristic of time-averaged than immediate optimization, Budgets emphasized the significance of shell and byssus towards both the carbon (8 and 44 %, respectively) and nitrogen (8 and 21 %, respectively) within total production, and indicated that betw...

Nitrogenase (EC 1.7.99.2) activity of nodules of cowpea (Vigna unguiculata [L.] Walp), maintained under conditions of a 12-hour day at 30 degrees C and 800 to 1,000 microeinsteins per square meter per second (photosynthetically active radiation) and a 12-hour night at 20 degrees C, showed a marked diurnal variation with the total electron flux through the enzyme at night being 60% of that in th...