期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
交替缺氧/好氧CAST处理低ρ_(COD)/ρ_(TN)生活污水的脱氮研究 被引量:3
1
作者 彭永臻 王丽 +3 位作者 马娟 王少坡 刘洋 马宁平 《北京工业大学学报》 EI CAS CSCD 北大核心 2012年第3期443-449,共7页
以低ρCOD/ρTN生活污水为处理对象,在连续和分段2种进水方式下分析了交替缺氧/好氧循环式活性污泥法工艺的脱氮性能及曝气需求量,并研究了分段进水方式下pH、ρDO和氧化还原电位(oxidation reduction potential,ORP)的变化规律.结果表... 以低ρCOD/ρTN生活污水为处理对象,在连续和分段2种进水方式下分析了交替缺氧/好氧循环式活性污泥法工艺的脱氮性能及曝气需求量,并研究了分段进水方式下pH、ρDO和氧化还原电位(oxidation reduction potential,ORP)的变化规律.结果表明,连续进水方式下,系统TN平均去除率75.1%,系统因长期低负荷运行而发生污泥膨胀,污泥容积指数(sludge volume index,SVI)平均值为229 mL/g,同时,曝气量升至0.56 m3/h时,才能使NH4+-N去除率大于99%;采用分段进水方式时,系统TN平均去除率可提高至81.5%,污泥沉降性能良好,并且曝气量降至0.24 m3/h时,系统NH 4+-N去除率仍大于99%,节省了运行费用.此外,当采用分段进水时,反应区内的pH值、ρDO和ORP值曲线有较明显的变化规律,并与反应区内污染物浓度的变化有着较好的相关性. 展开更多
关键词 交替运行 低ρCOD/ρTN 生物脱氮 循环式活性污泥法
在线阅读 下载PDF
我国二恶英和多氯联苯的研究现状及对策分析 被引量:7
2
作者 邢颖 吕永龙 +3 位作者 史雅娟 张红 王铁宇 贺桂珍 《环境保护科学》 CAS 2006年第5期33-35,共3页
为了解二恶英(PCDD/Fs)和多氯联苯(PCBs)在中国的研究水平、研究能力和驱动力,本文对有关研究论文的数量、题材、内容、资助来源和研究机构进行了系统调查和分析。调查发现,国内相关研究尚处在起步阶段,研究的方向和重点还需要进一步调... 为了解二恶英(PCDD/Fs)和多氯联苯(PCBs)在中国的研究水平、研究能力和驱动力,本文对有关研究论文的数量、题材、内容、资助来源和研究机构进行了系统调查和分析。调查发现,国内相关研究尚处在起步阶段,研究的方向和重点还需要进一步调整,研究能力有限,研究机构间合作交流不充分。针对这些问题,提出了相应的对策建议。 展开更多
关键词 二恶英 多氯联苯 持久性有机污染物 研究现状 环境政策
在线阅读 下载PDF
Use of Trans-Vaginal Ultrasound to Diagnose and Treat Infertility and Its Performance
3
作者 Sonia Rahman 《Open Journal of Radiology》 2023年第3期167-183,共17页
The use of trans-vaginal ultrasound (TVU) has become increasingly popular in diagnosing and treating infertility. TVU allows for a detailed examination of the female reproductive organs and can aid in identifying abno... The use of trans-vaginal ultrasound (TVU) has become increasingly popular in diagnosing and treating infertility. TVU allows for a detailed examination of the female reproductive organs and can aid in identifying abnormalities that may be contributing to infertility [1]. Additionally, TVU can assist in monitoring fertility treatments, such as in vitro fertilization. By TVS diagnosis of focal intrauterine lesions, uterine malformations and leiomyomas are easily delineated and nearly approaches the sensitivity of hysteroscopy. Abnormality of uterine cavity may affect fertility by inhibiting implantation [2]. TVS seems very accurate in the diagnosis of presence or extension of frank pelvic inflammatory disease and also promising in augmenting the outpatient diagnosis of PID among patients referred for lower abdominal pain. In addition to these conditions trans-vaginal sonography has also been described in the diagnosis of pelvic abscesses, pelvic mass, endometriomas, hydrosalpinx, intra uterine adhesions (Asherman’s syndrome), uterine hypoplasia and other developmental anomalies like mullerian or vaginal agenesis associated with infertility. In this study, it was established transvaginal sonography as a new and reliable diagnostic method by which was able to proceed accurately with more confidence in diagnosing infertility. The Study was a cross sectional study which was conducted at Combined Military Hospital (CMH), Cumilla. During the ultrasound exam, the Study physician evaluated 45 patients by TVS. Among 45 Patients, 8.89% of Leiomyoma, 11.11% of endometrioma, 6.67% of developmental abnormalities i.e. absent uterus, rudimentary uterus, ovarian agenesis, vaginal agenesis and short vagina. 15.56% of bulky uterus with PID, 24.44% of PCOD, 4.44% of retroverted uterus, 6.67% have adnexal cyst and 2.22% are found to have hydrosalpinx. The study found 20% (9 cases) of normal findings of pelvis. We found correlation between clinical findings and TVS findings subsequently 44.44% of leiomyoma, 71.43% of Endometrioma, 60% of Developmental anomaly, 69.23% of Normal Study, 77.78% of Bulky uterus with PID, 84.62% of PCOD, 66.67% of Retroverted Uterus, 60% of adnexal Cyst. 展开更多
关键词 ENDOMETRIOMAS HYDROSALPINX PID Adnexal Cyst pcod CONTRACEPTION
暂未订购
手术创伤对2型糖尿病小鼠术后认知功能和脑葡萄糖代谢的影响 被引量:4
4
作者 罗钢 崔永晨 +1 位作者 曹越 张俊峰 《上海交通大学学报(医学版)》 CAS CSCD 北大核心 2020年第11期1468-1472,共5页
目的·观察2型糖尿病小鼠腹部手术创伤后的学习记忆功能及相应功能脑区葡萄糖代谢功能的变化。方法·将40只雄性5周龄C57BL/6野生型小鼠用60%高脂饲料喂养,4周后使用烟酰胺和链脲佐菌素建成2型糖尿病模型,然后随机分为对照组和... 目的·观察2型糖尿病小鼠腹部手术创伤后的学习记忆功能及相应功能脑区葡萄糖代谢功能的变化。方法·将40只雄性5周龄C57BL/6野生型小鼠用60%高脂饲料喂养,4周后使用烟酰胺和链脲佐菌素建成2型糖尿病模型,然后随机分为对照组和腹部手术创伤组(手术组),每组15只。旷场实验和条件性恐惧实验观察手术创伤对小鼠学习记忆的影响(n=10);正电子发射型计算机断层显像(positron emission tomography/computed tomography,PET/CT)观察2组小鼠大脑相应脑区^(18)F-氟代脱氧葡萄糖(^(18)F-fluorodeoxyglucose,^(18)F-FDG)的摄取水平(n=5)。结果·旷场实验中,手术组的中央格穿越次数和总移动距离与对照组差异均无统计学意义;在条件性恐惧实验中,手术组的场景相关性记忆测试和声音相关性记忆测试的僵直时间比例均显著低于对照组(均P<0.05)。PET/CT中,手术组海马、皮质、纹状体及杏仁核脑区的^(18)F-FDG摄取率均显著高于对照组(均P<0.05)。结论·2型糖尿病小鼠腹部手术创伤后出现的认知功能障碍可能与其相关脑区葡萄糖代谢异常有关。 展开更多
关键词 术后认知功能障碍 正电子发射型计算机断层显像 ^(18)F-氟代脱氧葡萄糖 脑葡萄糖代谢 糖尿病
暂未订购
GC-MS analysis of Cocus nucifera flower extract and its effects on heterogeneous symptoms of polycystic ovarian disease in female Wistar rats
5
作者 V.Soumya Y.Indira Muzib +1 位作者 P.Venkatesh K.Hariprasath 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2014年第9期677-684,共8页
AIM: To evaluate the effect of Cocus nucifera L. flowers in reducing the major multiple symptoms of letrozole-induced polycystic ovarian disease(PCOD) in female rats. METHOD: Female, virgin Wistar rats were treated wi... AIM: To evaluate the effect of Cocus nucifera L. flowers in reducing the major multiple symptoms of letrozole-induced polycystic ovarian disease(PCOD) in female rats. METHOD: Female, virgin Wistar rats were treated with letrozole(1 mg/kg body wt) to induce PCOD, and after 21 days of induction rats were administered orally with 100 and 200 mg·kg-1 of Cocus nucifera flower aqueous extract, respectively. Estrus cycle and blood sugar were monitored once a week throughout the study. After scarification, various biochemical parameters, such as antioxidant status(superoxide dismutase(SOD) and glutathione reductase(GSH)) of the uterus homogenate, lipid profile(total cholesterol(TC), high density lipoprotein(HDL), low density lipoprotein(LDL), and triglycerides(TG)) of the serum were determined. Weights of the uterus and ovaries were separately monitored. The characteristics of changes in the ovary were evaluated by histopathological studies. RESULTS: GC-MS analysis of the aqueous extract showed the presence of volatile and pharmacologically active phytoconstituents. C. nucifera flower extract-treated groups showed estrus cyclicity and increased uterus weight which indicates the estrogenic effect. The improved blood sugar level, ideal lipid profile, good antioxidant status, and histopathology results revealed the recovery from poly cystic ovaries. CONCLUSION: The results indicate that C. nucifera flower is a potential medicine for the treatment of PCOD and this study supports the traditional uses of C. nucifera flower. 展开更多
关键词 flower uterus superoxide ovary monitored virgin cycle Female glutathione volatile
原文传递
OHIO spectrum as a proposed modified nomenclature for polycystic ovary syndrome
6
作者 Sukanti Bhattacharyya Sudarsan Saha Sukumar Barik 《Asian pacific Journal of Reproduction》 2025年第5期191-193,共3页
“What's in a name?That which we call a rose by any other name would smell as sweet”-William Shakespeare Polycystic ovary syndrome(PCOS)is one of the commonest endocrinopathy in the reproductive age group,as depi... “What's in a name?That which we call a rose by any other name would smell as sweet”-William Shakespeare Polycystic ovary syndrome(PCOS)is one of the commonest endocrinopathy in the reproductive age group,as depicted in a study among the North Indian population[1].The nomenclatures,the diagnostic criteria,the pathophysiology,and the modalities of treatment are full of controversies.Other names for this syndrome include Stein-Leventhal syndrome,polycystic ovary disease(PCOD),polycystic ovarian disease,functional ovarian hyperandrogenism,ovarian hyperthecosis and sclerocystic ovary syndrome,etc. 展开更多
关键词 stein leventhal syndrome modality treatment nomenclature diagnostic criteria polycystic ovary syndrome pathophysiology ovary disease pcod polycystic ovarian diseasefunctional polycystic ovary syndrome pcos
暂未订购
上一页 1 下一页 到第
使用帮助 返回顶部