Neonatal outcomes of congenital diaphragmatic hernia in full term versus early term deliveries: A systematic review and meta-analysis

This systematic review and meta-analysis aimed to review the optimal timing of delivery at term for neonates with prenatally diagnosed congenital diaphragmatic hernia (CDH). We reviewed the literature up to December 19, 2022 using MEDLINE and the Cochrane Library databases. The inclusion criteria were original articles, comparative studies of CDH neonates delivered at an early term (37–38 weeks of gestation) and at full term (39 weeks of gestation or later), and comparative studies investigating outcomes of CDH neonates. Six studies met the inclusion criteria, including 985 neonates delivered at an early term and 629 delivered at full term. The cumulative rate of survival to discharge showed no significant difference between CDH neonates delivered at an early term (395/515; 76.7%) or at full term (345/467; 73.9%) (risk ratio [RR] 1.01; 95% confidence interval [CI], 0.89–1.16; p = 0.85). Furthermore, the number of neonates requiring oxygen therapy at discharge was not significantly different between CDH neonates delivered at an early term (32/370; 8.6%) and at full term (14/154; 9.1%) (RR, 0.99; 95% CI, 0.36–2.70; p = 0.99). Therefore, the optimal timing of delivery at term for neonates with CDH remains unclear.     

以硅胶为基质的交联壳聚糖对Ni2+的吸附研究

以硅胶为基质的交联壳聚糖作为重金属Ni^2 的吸附剂，对影响该吸附Ni^2 的因素及吸附剂的再生和其吸附能力的变化，吸附机理等进行了研究。结果显示，吸附剂在一定的实验条件下对Ni^2 的最高吸附量按每克壳聚糖计可达650mg/g，且吸附平衡时间短。在柱法实验中其吸附率在99．9％以上。     

铝合金管缩为长锥管金属沿轴向延伸和壁厚变化规律的研究

对铝合金管在无芯棒情况下,缩为内锥为2.5°左右长锥管的金属沿轴向延伸率和壁厚变化规律进行研究,提出了相应的计算公式,可做为确定管坯长度和模具型腔尺寸的依据.     

Cd~(2+) removal from wastewater by sulfate reducing bacteria with an anaerobic fluidized bed reactor

Ｃｄ２＋ｒｅｍｏｖａｌｆｒｏｍｗａｓｔｅｗａｔｅｒｂｙｓｕｌｆａｔｅｒｅｄｕｃｉｎｇｂａｃｔｅｒｉａｗｉｔｈａｎａｎａｅｒｏｂｉｃｆｌｕｉｄｉｚｅｄｂｅｄｒｅａｃｔｏｒＭａＸｉａｏｈａｎｇ，ＨｕａＹａｏｘｉ，ＪｉａｎｇＦｅｎｇＩｎｓｔｉｔｕｔｅｏｆＭ...     

人工神经网络在沿海区域环境复杂系统预测中的应用

针对复杂系统的非线性特征，分析了应用人工神经网络技术实现可持续发展复杂系统预测的可能性，并以上海市和崇明县为例建立沿海区域预测模型，取得了较好的预测结果，为可持续发展复杂系统的预测研究探索了一种新的可能方法。     

绿色化学设计过程的定量化方法

通过对环境优先污染物的优化选择策略的研究，设计一种新的评价方法将化学物质对环境的影响定量化。具体先设计一个环境因子，尽量全面考虑到化学物质对环境的各种影响。用人力资本法对其进行经济评价，使最终通过化学物质的环境因子可得到定量化的经济影响。     

合理利用土地资源改善生态环境 促进社会发展

沙漠化、水土流失、草场退化等土地退化问题,是一个全球性的生态环境问题,如何有效控制土地退化,迅速恢复和提高退化土地生产力,寻求一条可持久发展的土地利用途径,以满足人类社会发展的需要,是我们当今面临的一项艰巨任务。本文阐述了中国土地退化的现状、治理土地退化的成就及今后治理的对策和行动。     

Study on catalysts for combustion of lean CH_4

ＳｔｕｄｙｏｎｃａｔａｌｙｓｔｓｆｏｒｃｏｍｂｕｓｔｉｏｎｏｆｌｅａｎＣＨ＿４ＺｈｏｕＺｅｘｉｎｇ，ＹｉｎＬｉｎｇ，ＸｕＪｉｎｇＫｅｓｅａｒｃｈＣｅｎｔｅｒｆｏｒＥｃｏ－ＦｎｖｉｒｏｎｍｅｎｔａｌＳｃｉｅｎｃｅｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃ...     

带轮毂直齿圆柱齿轮精锻的变形分析

此文对空心坯料精锻带轮毂直齿圆柱齿轮工艺进行了模拟实验,并以座标网格法着重对精锻终了阶段进行了变形分析,获得了金属流动规律,提出了对制订精锻工艺有参数价值的结论。