Results 151 to 160 of about 2,125,466 (224)
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 6, Page 756-763, June 2026.ABSTRACT Objectives Cytomegalovirus (CMV) is the leading cause of congenital infectious neurosensory impairment. We aimed to present national epidemiological data on maternal CMV infection during pregnancy in France, focusing in particular on primary infection in the periconceptional period or first trimester, and to assess the impact of changes in ...
P. Coste‐Mazeau +176 more
wiley +1 more source
, 2005 一种用于液化气中烯烃芳构化和烷基化反应生产高辛烷值洁净汽油的催化剂，由SiO2/Al2O3摩尔比为20～80的ZSM-5、ZSM-11、MCM-22、ZSM-35分子筛的一种或几种混合分子筛、稀土元素和惰性组分组成，其中分子筛重量范围为15-70％，稀土元素重量范围为0-5％，其余为催化剂成型过程中的惰性组分。该催化剂用于炼厂液化气中烯烃芳构化生产高辛烷值洁净汽油过程，所得的汽油辛烷值高，非苯芳烃含量高(大于50％)，而苯含量很低(小于1％)，烯烃含量低(小于15％)，可以达到重整汽油的性能 ...
徐龙伢 +4 more
core
[Case-based teaching with both positive and negative examples in undergraduate analytical chemistry laboratory： determination of six nitrogen-containing pesticides in environmental samples by solid-phase microextraction-high performance liquid chromatography]. [PDF]
Se PuZhang J +4 more
europepmc +1 more source
Home‐Based Versus In‐Hospital Care in Pediatrics: A Systematic Review of Cost‐Effectiveness Studies
World Medical &Health Policy, Volume 18, Issue 2, June 2026.ABSTRACT Home‐based care has emerged as a potential alternative to traditional hospital‐based care for children and adolescents worldwide. This systematic review aimed to systematically gather and critically assess the available evidence on the cost‐effectiveness of home‐based versus in‐hospital care for pediatric populations globally.
Luís Carlos Lopes‐Júnior +8 more
wiley +1 more source
, 2006 水辅助生长准一维氧化物纳米材料已有一些研究,但用该法合成准一维SnO2纳米材料的工作尚未见文献报道。我们以高纯Sn粉为原料,采用水辅助生长法在850℃下合成了SnO2纳米带和新奇的SnO2纳米结构。用SEM、TEM、XRD、EDX、HRTEM和SAED对其形貌、结构、和组成进行了表征;对SnO2纳米带的光致发光和红外进行了分析;探讨了水辅助生长SnO2纳米带的生长机制。结果表明 ...
周泽广 +4 more
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Gongye shui chuli含盐废水广泛产生于化工、印染、制药及垃圾渗滤液处理等领域，其高盐度特性不仅抑制传统生物对其的处理效能，还易造成土壤盐渍化、水体生态失衡等环境风险。随着“双碳”目标的深入落实和循环经济发展需求的持续升级，含盐废水的处理技术不断发展，但仍面临挑战。采用文献调研和文献计量学相结合的方法，以聚类分析结果系统展示了近年来含盐废水研究进展及发展趋势。综述了热力法、吸附法、膜分离法、高级氧化法、化学沉淀法、电化学法、生物滤池和膜生物反应器等物理、化学和生物法的原理、适用对象和优缺点。重点列举了“减量化-无害化-资源化”
唐正 +7 more
doaj
[Revolution teaching practice in sample pretreatment supported by large-scale instrument： a case study of magnetic covalent organic framework enriching organic ultraviolet filters in seawater]. [PDF]
Se PuLi S +5 more
europepmc +1 more source
Functional Ecology, Volume 40, Issue 6, Page 1725-1739, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Root exudates play a key role as signals and nutrients in mediating plant–microbe communication. However, critical knowledge gaps remain regarding how root exudates mediate soil–microbe–plant interactions to regulate crop yield under long‐term straw mulching combined ...
Jiajie Song +7 more
wiley +1 more source
, 2010 一种催化碳氢键氧化的新方法：采用主族元素的金属离子产生的静电场和环N-羟基化合物作为催化剂，催化碳氢键的氧化反应。产生静电场的金属离子来源可以为碱金属盐、碱土金属的盐类化合物，包括Li、Na、K、 Rb、Cs、Mg、Ca、Sr、Ba的氯化物、硝酸盐、硫酸盐、羧酸盐等。采用能够产生自由基的氮氧化合物，通常为环N-羟基亚胺。该化合物的氢原子可以被其它的取代基取代，环上的碳原子也可以被其它杂原子取代。该方法可用于氧化烷烃、烯烃、芳香烃的侧链 ...
徐 杰 +4 more
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[Diabetic foot care: full-lifecycle management driven by digital intelligent technologies]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiChen L, Ran X.
europepmc +1 more source