Rates of purine synthesis de novo, as measured by the incorporation of [14C]formate into newly synthesized purines, have been determined in cultured human fibroblasts derived from normal individuals and from patients deficient in adenosine deaminase, purine nucleoside phosphorylase, or hypoxanthine phosphoribosyltransferase, three consecutive enzymes of the purine salvage pathway. All four type...

The Token Passing MAC protocol for Ad Hoc networks (T-MAH), discussed in this paper, is a distributed medium access protocol designed for wireless multi-hop networks. With T-MAH access scheme the network is organized in clusters (called Token Groups) with a Token Group Head as the leader of the group. In each single cluster is used a token based technique, i.e. each node in the cluster is allow...

The polyphosphazene {NP[O(2)C(12)H(7.5)(NH(2))(0.5)]}(n), prepared by reacting {NP[O(2)C(12)H(7.5)(NO(2))(0.5)]} with the Lalancette's reagent, was used for attaching enzymes such as alcohol dehydrogenase (ADH-A) and lipase (CAL-B). The resulting new biocatalysts exhibited great potential as tunable supports for enzymatic reactions in both aqueous and organic media. The material with immobilize...

The recalcitrant fraction of marine dissolved organic matter (DOM) plays an important role in carbon storage on the earth's surface. Bacterial production of recalcitrant DOM (RDOM) has been proposed as a carbon sequestration process. It is still unclear whether bacterial physiology can affect RDOM production. In this study, we conducted a batch culture using the marine bacterial isolate Alterom...

INTRODUCTION Prior studies have suggested that pacemaker reuse may be a reasonable alternative to provide device therapy in the low- and middle-income countries. We studied explant indications and remaining battery life of cardiac implantable electronic devices (CIEDs) at a tertiary medical center. METHODS AND RESULTS We conducted a retrospective review of all CIEDs extracted at the Universit...

1. Activities of arginine synthetase system enzymes, alanine aminotransferase (AlT) and branched-chain amino acid transaminase (BATase) were measured in control and uraemic rats after 2 weeks on a free protein intake and after 10 days on a lowprotein diet. 2. Protein restriction alone reduced the activity of all three enzymes. 3. Uraemia alone increased the activity of arginine synthetase syste...