Results 51 to 60 of about 1,138 (115)
卵泡液白血病抑制因子浓度对IVF-ET妊娠结局的影响 [PDF]
, 2006 【目的】检测卵泡液内白血病抑制因子（LIF）浓度，探讨LIF和体外受精和胚胎移植（IVF-ET）妊娠结局的关系。【方法】接受IVF-ET治疗周期的患者在取卵时留取第1管清亮无血染卵泡液，用酶联免疫吸附法（ELSIA）测定卵泡液内LIF浓度。并对LIF和年龄、性激素、移植胚胎质量以及妊娠率等因素进行分析。【结果】共收集了164个IVF-ET周期（164个病人）的卵泡液。66例妊娠，妊娠率40．2％。卵泡液LIF浓度在妊娠组和未妊娠组间元显著性差别 ...
周灿权 +4 more
core
Functional Ecology, Volume 39, Issue 10, Page 2704-2716, October 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Moso bamboo (Phyllostachys edulis) invasions into broadleaf forests can cause serious ecological problems, such as reducing biodiversity and disrupting community succession.
Ting Zhou +5 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2007 【目的】比较两种植骨材料PepGen P15 Flow（简称P15）和Bio-Oss引导即刻种植体周骨组织再生能力及骨一种植体结合能力。【方法】将beagle犬下颌单侧双尖牙全部拔除，然后在新鲜拔牙窝内植入种植体3颗。植入后于种植体颊侧制备标准骨缺损并作如下处置：A组空置，B组植入P15，C组植入Bio-Oss；覆盖Bio-Gide，初期缝合伤口。于术后第6周、12周将beagle犬分期处死获取标本，进行大体、影像学、组织学观测。【结果】B、C组植骨区外形均较A组膨隆，尤其是C组。X线观察可见B ...
邓飞龙 +5 more
doaj
, 2007 【目的】探讨常规体外受精胚胎移植（in vitro fertilization and embryo transfer,IVF-ET）不受精时,应用卵母细胞单精子显微注射（intracytoplasmic sperm injection,ICSI）技术进行补救授精的临床意义。【方法】2001年8月～2005年8月,在499个常规IVF-ET周期中有25个周期完全不受精,进行补救ICSI,并与同期实施的179个正常ICSI周期进行比较。【结果】补救ICSI组与正常ICSI组比较,HCG日平均血清雌二醇水平、
于丛一 +8 more
core
Assessing the Corn Belt as an anthropogenic barrier to migrating landbirds in the United States
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract Migrating landbirds adjust their flight and stopover behaviors to efficiently cross inhospitable geographies, such as the Gulf of Mexico and the Sahara Desert. In addition to these natural barriers, birds may increasingly encounter anthropogenic barriers created by large‐scale changes in land use. One such barrier could be the Corn Belt in the
Fengyi Guo +7 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2019 目的探讨富血小板纤维蛋白(PRF)对即刻负重种植体周围骨缺损的影响。方法选取比格犬5只,将每只犬左右两侧下颌第四前磨牙牙位随机分为观察组和对照组,拔除后立即植入柱状螺纹纯钛种植体并即刻负重,观察组采用PRF填充,对照组不填任何填充物。采用X线测量颊侧骨量增加高度、缺损面积、骨性结合率和新骨生成率;采用能谱分析两组种植体-新骨界面Ca2+含量,HE染色观察骨组织形态。结果观察组种植术后3个月种植体部位骨表面Ca2+含量为(43.20±7.14)%,明显高于对照组 ...
余海云, 张国荣, 郭静
doaj
, 2004 【目的】探讨体外受精-胚胎移植(IVF-ET)术后妊娠早产的相关因素。【方法】回顾性分析我院1992年1月至2001年12月的221例IVF-ET术后妊娠妇女的临床资料,根据分娩孕周分为早产组和足月分娩组,用Logisticregression分析与早产有关的因素。【结果】优势比(OR)大于1的相关因素有:宫内感染(OR=42.334)、双胎妊娠(OR=20.536)、妊娠期糖耐量异常(OR=3.823)、胎膜早破(OR=2.284)、中重度妊高征(OR=1.664)、盆腔粘连(OR=1.367 ...
core
On the normative roles of biodiversity and naturalness in conservation
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract Nature is an opaque concept. Consequently, the term biodiversity conservation has replaced nature conservation in most conservation contexts. We review the conceptual indeterminacies that plague the terms nature and natural but then show that comparable difficulties plague biodiversity.
David Saltz, Shlomo Cohen
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2000 【目的】评价Brå nemark 种植义齿修复全牙列缺失2 年后的临床效果。【方法】采用Brå nemark 种植系统的常规 操作方法, 在Ⅰ 期手术时, 354 颗Brå nemark 种植体被植入全牙列缺失的66 例患者;4 ～ 6 个月后, 进行Ⅱ 期手术;再经1 周后, 用固定可卸式修复体修复。【结果】Brå nemark 种植体修复后2 年, 累积成功率上颌为91.1%, 下颌为97.4 %, 修复体的稳定 率为100%。【结论】Brå nemark ...
邓飞龙 +3 more
doaj
Assessing limits of sustainable seed harvest in wild plant populations
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract Seed harvesting from wild plant populations is key for ecological restoration, but it may threaten the persistence of the source populations. Consequently, several countries have set guidelines limiting the proportions of harvestable seeds. However, these guidelines are inconsistent and lack a solid empirical basis.
Anna Bucharova +3 more
wiley +1 more source