Des chercheurs de Toulouse sont parvenus à créer du fer pur en utilisant exclusivement de l'urine humaine soumise à du ...

إعداد: أ.د.صبحي فهمي منصور أستاذ الأراضي بمعهد بحوث الأراضي والمياه والبيئة – مركز البحوث الزراعية من الأهمية أن نعتبر صحة التربة مؤشرًا مركبًا يجمع الخصائص الكيميائية والفيزيائية والبيولوجية، وليس وح ...

Urease is one of the most consequential enzymes in the microbial world. By hydrolyzing urea into ammonia and carbon dioxide, ...

Our work provides insights into how cells solve the problem of trafficking a toxic metal, nickel, to the active site of urease. Colonization of Helicobacter pylori in acidic human stomach requires the ...

UE能够水解尿素，产生氨和碳酸。UE活性与有机物质含量、全氮和速效氮含量呈正相关，反应了氮素状况。 测定原理： 利用靛酚蓝比色法测定脲酶水解尿素产生的NH3-N。 需自备的仪器和用品 ...

主要用于测定尿和血液中的尿素，是一种含镍的寡聚酶。催化尿素水解生成碳酸和两分子氨的含镍酶，并释放出氨和二氧化碳。 酶促反应： 脲酶将样品中的尿素水解为氨。 显色反应： 产生的氨 ...

The Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) requires that all pesticides sold or distributed in the United States (including imported pesticides) be registered by the U.S.

An international research team led by the University of Waterloo is developing technology to dissolve painful kidney stones in the urinary tract using tiny robots. The research is published in the ...

The urea breath test is used to detect Helicobacter pylori (H. pylori), a type of bacteria that may infect the stomach and is a main cause of ulcers in both the stomach and duodenum (the first part of ...