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氮化次数对H13模具钢氮化质量的影响
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作者 邱昊昊 张迪 王磊磊 《铸造设备与工艺》 2024年第3期66-68,共3页
对H13模具钢进行一次、二次、三次氮化,通过硬度和微观组织的比较分析氮化次数对H13模具钢性能与组织的影响。结果表明,随着氮化次数增多,渗氮层厚度增高,模具硬度增高,氮化组织质量变差。
关键词 氮化处理 模具钢 渗氮层 多次氮化
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Japanese herbal medicine, Saiko-keishi-to, prevents gut ischemia/reperfusion-induced liver injury in rats via nitric oxide 被引量:1
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作者 Yoshinori Horie Mikio Kajihara +5 位作者 Shuka Mori Yoshiyuki Yamagishi Hiroyuki Kimura Hironao Tamai Shinzo Kato Hiromasa Ishii 《World Journal of Gastroenterology》 SCIE CAS CSCD 2004年第15期2241-2244,共4页
AIM:To determine whether Saiko-keishi-to(TJ-10),a Japanese herbal medicine,could protect liver injury induced by gut ischemia/reperfusion(I/R),and to investigate the role of NO. METHODS:Male Wistar rats were exposed t... AIM:To determine whether Saiko-keishi-to(TJ-10),a Japanese herbal medicine,could protect liver injury induced by gut ischemia/reperfusion(I/R),and to investigate the role of NO. METHODS:Male Wistar rats were exposed to 30-min gut isohemia followed by 60 min of reperfusion.Intravital microscopy was used to monitor leukocyte recruitment.Plasma tumor necrosis factor(TNF)levels and alanine aminotransferase (ALT)activities were measured.TJ-10 1 g/(kg.d)was intragastrically administered to rats for 7 d.A NO synthase inhibitor was administered. RESULTS:In control rats,gut I/R elicited increases in the number of stationary leukocytes,and plasma TNF levels and ALT activities were mitigated by pretreatment with TJ-10.Pretreatment with the NO synthase inhibitor diminished the protective effects of TJ-10 on leukostasis in the liver,and the increase of plasma TNF levels and ALT activities.Pretreatment with TJ-10 increased plasma nitrite/nitrate levels. CONCLUSION:TJ-10 attenuates the gut I/R-induced hepatic microvascular dysfunction and sequential hepatocellular injury via enhancement of NO production. 展开更多
关键词 Liver Circulation Animals Drugs Chinese Herbal Liver Diseases control Male Nitric Oxide RATS Rats Wistar Reperfusion Injury Research Support Non-U.S. Gov't
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