土壤杆菌固氮、溶磷活性及对植物的促生作用

通过选择性培养基,定性和定量检测了26株土壤杆菌的固氮和溶磷活性,通过盆栽检测了澳洲生防菌株K1026对黄瓜和小麦的促生长作用。结果显示,包括致病性和无致病性的26株土壤杆菌均可在无氮培养基上正常生长;其中19株具有溶磷活性,K1026对磷酸钙液体培养基的溶磷量为109.11μg/m L;对黄瓜幼苗根系生长具有显著促进作用,但对小麦生长没有明显影响。     

硝酸蒸汽多相催化氧化法固氮的研究

介绍有关用硝酸蒸汽多相催化氧化分子氮过程的热力学和实验研究 ,能耗分析以及该过程用于硝酸生产的工业试验     

乳浆大戟中黄酮类化学成分研究

研究乳浆大戟EuphorbiaesulaL．的化学成分。利用色谱技术进行分离、纯化,通过波谱解析结合理化性质鉴定化合物的结构。从乳浆大戟乙酸乙酯提取物分离得到3个单体化合物,分别鉴定为槲皮素-3—O-α—L-鼠李糖苷（1）、山奈酚-3-O-β-D-吡喃葡萄糖苷（2）、槲皮素-7—O—β-D-吡喃葡萄糖苷（3）。     

Notch signalling controls pancreatic cell differentiation.

The pancreas contains both exocrine and endocrine cells, but the molecular mechanisms controlling the differentiation of these cell types are largely unknown. Despite their endodermal origin, pancreatic endocrine cells share several molecular characteristics with neurons, and, like neurons in the central nervous system, differentiating endocrine cells in the pancreas appear in a scattered fashion within a field of progenitor cells. This indicates that they may be generated by lateral specification through Notch signalling. Here, to test this idea, we analysed pancreas development in mice genetically altered at several steps in the Notch signalling pathway. Mice deficient for Delta-like gene 1 (Dll1) or the intracellular mediator RBP-Jkappa showed accelerated differentiation of pancreatic endocrine cells. A similar phenotype was observed in mice over-expressing neurogenin 3 (ngn 3) or the intracellular form of Notch3 (a repressor of Notch signalling). These data provide evidence that ngn3 acts as proendocrine gene and that Notch signalling is critical for the decision between the endocrine and progenitor/exocrine fates in the developing pancreas.     

Insulin signalling and the regulation of glucose and lipid metabolism.

The epidemic of type 2 diabetes and impaired glucose tolerance is one of the main causes of morbidity and mortality worldwide. In both disorders, tissues such as muscle, fat and liver become less responsive or resistant to insulin. This state is also linked to other common health problems, such as obesity, polycystic ovarian disease, hyperlipidaemia, hypertension and atherosclerosis. The pathophysiology of insulin resistance involves a complex network of signalling pathways, activated by the insulin receptor, which regulates intermediary metabolism and its organization in cells. But recent studies have shown that numerous other hormones and signalling events attenuate insulin action, and are important in type 2 diabetes.