Results 1 to 10 of about 586,461 (148)
Zhejiang Daxue xuebao. Lixue ban, 2014 以杭州市7条主要河道21个监测断面1循环年的水质监测数据为依据，运用污染指数法和模糊评价法对市区主要河道水质进行综合评价，同时探讨2种水质评价方法的评价效果.结果表明：①杭州市区主要河道均存在不同程度的污染，主要污染物是TN、-N和TP，即氮磷营养盐，而有机污染相对较小；②污染指数法评价结果与实际水体的标准差距较小，与真实情况吻合较好；③当水质为劣V类时，模糊评价结论偏保守，而当某项指标严重超标时则易使评价结果偏重；④污染指数法更适合杭州市区河道水环境的评价.
HEPing(何平) +5 more
doaj +2 more sources
The Anatomical Record, Volume 306, Issue 12, Page 3214-3228, December 2023., 2023 Abstract The effectiveness and safety of electroacupuncture (EA) for constipation have been confirmed by numerous clinical studies and experiments, and there are also studies on the efficacy of EA for Parkinson's disease (PD) motor symptoms. However, there are few researches on EA for PD constipation.
Li‐Zhe‐Xiong Song +8 more
wiley +1 more source
Methods in Ecology and Evolution, Volume 14, Issue 6, Page 1443-1456, June 2023., 2023 Abstract Successful use of stable isotopes (δ2H and δ18O) in ecohydrological studies relies on the accurate extraction of unfractionated water from different types of soil samples. Cryogenic vacuum distillation (CVD) is a common laboratory‐based technique used for soil water extraction; however, the reliability of this technique in reflecting soil ...
Bin Yang +14 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 61, Issue 3, Page 310-324, March 2023., 2023 ABSTRACT Objective To evaluate the diagnostic accuracy of different ultrasound signs for diagnosing adnexal torsion, using surgery as the reference standard. Methods This was a systematic review and meta‐analysis of studies published between January 1990 and November 2021 evaluating ovarian edema, adnexal mass, ovarian Doppler flow findings, the ...
I. Garde +8 more
wiley +1 more source
Noninvasive diode laser–an effective and safe treatment of iris cysts in 46 eyes of 35 horses
Equine Veterinary Journal, Volume 55, Issue 2, Page 205-213, March 2023., 2023 Abstract Background Iris cysts in horses are often asymptomatic and noticed incidentally. However, cysts can cause local corneal oedema and erratic behaviour like shying, decreased performance and head‐shaking. Objectives To describe the use of diode laser as a noninvasive treatment option for iris cysts in the horse and to document factors influencing
Emanuël K. L. Stas +4 more
wiley +1 more source
Gongye shui chuli, 2021 生物测试方法包括体外生物测试与体内生物测试，是水质毒性评价中的重要手段。综述了常用于水质毒性评价的体外和体内生物测试方法。针对体外生物测试，介绍了细胞毒性与遗传毒性实验的方法及应用现状，并着重论述了重组受体报告基因法的生物活性终点种类和效应触发值；针对体内生物测试方法，阐述了体内实验的受试生物种类、毒性测试方法与毒性终点判断。在此基础上，比较了体外生物测试和体内生物测试的优缺点，并对生物测试应用于水质毒性评价的未来研究方法提出了建议，旨在为今后生物测试方法在水质毒性评价中的应用及相关标准制定提供参考。
胡贤达 +5 more
doaj +2 more sources
Haiyang yu huzhao全氟辛酸(perfluorooctanic acid, PFOA)是一种具有多系统毒性的新污染物，对双壳贝类可产生一定的免疫毒性效应，损害机体的正常免疫功能。益生菌作为一种安全无毒的食品级制剂，已被应用于水产养殖行业，用以提高水生生物的免疫防御能力。然而，益生菌对贝类中新污染物所引发的生物毒性是否有消减作用，目前尚不可知。据前期研究，新污染物PFOA在水生生物尤其贝类中存在较高的蓄积量，具有潜在的生态和健康风险。因此，探索经济贝类中益生菌对PFOA免疫毒性的消减作用具有重要意义 ...
周 扬 +6 more
doaj +1 more source
Gongye shui chuli, 2000 提出一种以水污染损失率为基础的评价污水水质的方法。污水水质的污染物;浓度Ci与水质损害值Si的函数关系为Si=K/〔1+aiexp(-bi·Ci)〕,由此可推导出综合污染损失率,找出水质损害程度与污水水质综合评价的关系,评价结果被赋予鲜明的物理意义。实例表明该方法是非常有效的。
孙峻, 柯崇宜
doaj +2 more sources
Shuitu Baochi Xuebao, 2004 水资源评价是水资源利用基础。综述了水资源评价研究进展，提出了水资源评价中存在的问题，并对水资源评价中的干流区间水资源计算、水质水量联合评价、人类活动对水资源的影响以及生态需水等4个问题进行讨论，以推进水资源评价工作进展。
李春晖 杨志峰
doaj +2 more sources
, 1988 本文从海洋工程地质工作的发展阐明区域性调查和评价是历史发展的必然和技术进步的结果。文中比较全面地介绍了包括海上和岸上两方面工作的调查方法,资料解释工作的目的和意义,以及工程地质评价的内容和作用。强调了地球物理 ...
顾小芸
core +2 more sources