Results 51 to 60 of about 11,469 (222)
新型3-(1,3,4-噻二唑基)-1,3-苯并噁嗪类化合物的合成和杀菌活性
, 2012 以2-[（1，3，4-噻二唑基-2-氨基）甲基]苯酚和CH2C12为原料，首次采用相转移催化法合成了一系列新型3-（1，3，4-噻二唑基）-1，3-苯并嗯嗪类化合物，产率为47％-62％．研究了相转移催化剂的用量、反应物用量、反应温度等对反应产率的影响．产物结构用IR，1HNMR，13CNMR和元素分析进行了表征．初步研究了目标化合物的杀菌活性，大部分化合物具有一定的杀菌活性．
Zilong Tang +4 more
semanticscholar +1 more source
野生动物学报, 1981 在人工养麝和活麝取香获得经验的基础上,进一步研究麝的繁殖和提高仔麝的成活率,是扩大麝群,增加麝的数量和麝香产量的重要途径。目前,全国大多数省（区）都在开展养麝生产活动,现将我们在养麝生产中麝的繁殖和提高仔麝成活率所采取的措施以原麝（Maschus moschiferus）为例做简要介绍,供参考。
毕书增, 颜于宏, 许树安
doaj
Effect of simultaneous or staged management of uterine septum complicated with uterine fibroids on reproductive endocrinology and prognosis [PDF]
Objective To evaluate the efficacy of simultaneous or staged management of uterine fibroids by transcervical resection of septum （TCRS）， reproductive endocrinology and clinical prognosis.
HE Wei, LIU Xiumei, GUO Xiyu, ZHANG Qiuyue
core +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 6, Page 768-775, December 2024.Abstract Objective Lower urinary tract obstruction (LUTO) is a chronic condition with a spectrum of outcomes. It is usually suspected prenatally based on ultrasound features (USFs). Given the unknown postnatal trajectory and the potential for significant morbidity and mortality, many families choose termination of pregnancy (TOP), often based on USFs ...
J. Richter +10 more
wiley +1 more source
2,6,6-三甲基-双环[3,1,1]庚基-3-(4-芳基-2-噻唑)腙类化合物的合成及其抑菌和抗肿瘤活性研究
, 2014 以α-蒎烯为起始原料，经加成、氧化、缩合制得中间体，继而与α-溴代芳基乙酮任常温下反应合成12个新型2,6，6-三甲基双环[3，1，1]庚基-3-（4-芳基-2-噻唑）腙类化合物，产率达52．4％~88．9％．其结构经^1H NMR，^13C NMR，IR，LC／MS和元素分析进行了确证．初步生物活性测试结果表明：部分目标化合物具有较好的抑菌活性和一定的抗肿瘤活性．
鲍名凯 +5 more
semanticscholar +1 more source
Current Status and Prospects of Fertility Preservation Strategies for Patients with Tumors [PDF]
With the changing disease spectrum, the incidence of tumors is increasing and tends to occur among the youth. The long-term survival rate of patients with cancer has increased significantly, and attention to their reproductive rights is growing. Surgery,
Changyue YAO +3 more
core +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 5, Page 635-650, November 2024.ABSTRACT Objectives To reach an international expert consensus on the diagnosis, prognosis and management of fetal lower urinary tract obstruction (LUTO) by means of a Delphi procedure, and to use this to define a core outcome set (COS). Methods A three‐round Delphi procedure was conducted among an international panel of experts in fetal LUTO.
H. J. Mustafa +90 more
wiley +1 more source
多形炭角菌 Xylaria polymorpha 菌丝发酵的次级代谢产物研究
, 2017 从多形炭角菌 Xylaria polymorpha （Pers.：Fr.）Grer菌丝发酵产物乙酸乙酯部分中分离鉴定了21个化合物，包括2个新的drimane型倍半萜polymorphines A，B（ 1 ~ 2 ），1个新的phenyloxolane类化合物2-甲基-2-（4-羟甲基苯基）氧杂环戊烷（ 3 ）和18个已知化合物 4 ~ 21 .利用NMR和X射线单晶衍射技术对上述化合物结构进行鉴定与确认.化合物 2 具有一定的乙酰胆碱酯酶及 α -葡萄糖苷酶抑制活性.此外，化合物 3 ...
杨宁宁 +8 more
semanticscholar +1 more source
Biotropica, Volume 56, Issue 6, November 2024.This study examines the distribution and environmental correlations of 1081 large old trees (LOTs) across 74 species in Hainan Island, South China. The findings reveal uneven spatial patterns, with species diversity varying across the island and influenced by factors such as GDP, urbanization, and forest cover.
Chunping Xie +3 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 4, Page 504-512, October 2024.ABSTRACT Objective To investigate the association between varying degrees of abnormality in the Doppler uterine artery pulsatility index (UtA‐PI) and adverse perinatal outcome. Methods This was a prospective study of women with a singleton, non‐anomalous pregnancy in whom UtA‐PI was measured universally in midpregnancy and who gave birth in Oxford ...
S. Dockree +6 more
wiley +1 more source