Determination of Seven N-Nitrosamines in Ready-to-Eat Fish Products by GC-MS/MS with Alkali-Treatment Coupled Salt-Assisted Dispersive Liquid-Liquid Microextraction(碱处理结合盐辅助分散液液微萃取GC-MS/MS检测即食鱼制品中7种N-亚硝胺) [PDF]
Shipin kexue jishu xuebao, 2021 To improve the detection efficiency, a new method for the determination of 7 N-nitrosamines in ready-to-eat fish products was developed by GC-MS/MS with alkali treatment coupled salt-assisted dispersive liquid-liquid microextraction (SADLLME). The sample
HOU Tongyao(侯彤瑶) +5 more
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Gongye shui chuli, 2020 采用原子吸收法测定了高矿化度压裂返排液水样中钠、钙、镁、铁、钡、铝、锰等7种金属元素的含量，通过分析Ca2+、Mg2+、Fe3+对疏水缔合聚合物溶解能力的影响，确定了Ca2+是主要因素。室内开发了能络合游离Ca2+的处理剂，使其形成水溶性螯合物，消除金属离子对疏水缔合聚合物溶解能力的影响。在长庆油田15口井进行了现场应用，回收处理液3 900 m3，不仅促进了水资源的循环利用，而且减少了环境污染。
高峰 +4 more
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Gongye shui chuli针对油田采出水中钡离子（Ba2+）回收率低的技术瓶颈，本研究开发了核晶造粒技术（NCP），通过专用晶种的设计并辅以诱晶剂（碳酸钠，Na2CO3）的投加，系统揭示了关键干扰因子对Ba2+回收的影响机制。研究结果表明，当诱晶剂投加量物质的量比〔n（CO32-）/n（Ba2+）〕为1.75，进水流量为20 L/h，反应pH区间为9~10时，Ba2+的回收效率稳定在90%以上。X射线衍射（XRD）和X射线光电子能谱（XPS）分析证实，Ba2+主要以碳酸钡的形式附着于晶种表面，其纯度可达90%。扫描电镜-能谱 ...
徐艳宁 +7 more
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One Case with Incomplete Intestinal Obstruction Caused by Barium Enema
Huli yanjiu, 1996 钡剂灌肠是临床上常用于检查结肠和回肠末端疾病的放射性诊断方法。钡剂原子量高,比重大,不被人体吸收。一般钡剂灌肠后1～2天排出,无副作用,钡剂灌肠致不全肠梗阻在临床上极为少见。1995年8月23日,我院收治1例因钡剂灌肠后6天排不出致不全肠梗阻的患者,经治疗和护理10天后痊愈出院。现报道如下:
郝恩馨, 刘碧书, 刘红玲
doaj
Zhongguo shiyan zhenduanxue, 2016 空回肠憩室属于小肠憩室,相对于消化道其它部位憩室患病率比较低。因检查手段有限,且大多数患者临床上无特异性表现,该病的诊断仍较困难,胃肠道钡剂检查中发现率为1%-3%[1]。为探讨X线消化道造影检查对该病诊断的价值,提高对该病的认识,收集我院近10年诊断的空回肠憩室患者54例进行分析,报道如下。1对象与方法1.1研究对象我院2003年9月至2014年6月,共行消化道造影检查4967例,检出空回肠憩室45例,检出率0.91%,
邹军, 杨蓉, 孙秀静, 徐有青
doaj
Gongye shui chuli针对油气采出水中赋存的碘、钡、锶、锂等多种有价资源，构建了基于核晶造粒的梯级回收工艺，并系统探究了核晶造粒回收有价资源的效能与内在机制。结果表明，在最佳诱晶剂投加量下，碘、钡、锶和锂的回收率分别为78.5%、88.6%、91.6%和82.9%。连续流实验结果进一步证实，核晶造粒工艺可实现油气采出水中有价元素的稳定高效回收，且所得造粒体碘酸钡、碳酸钡、碳酸锶以及磷酸锂的纯度分别为92.5%、85.6%、84.2%以及93.9%。通过XRD、Raman及SEM-EDS等对造粒体的结构和形貌进行表征 ...
郭斌 +9 more
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Association of the levels of heavy metals and trace elements during pregnancy with congenital heart defects in offspring: a prospective cohort study. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2022 Liu JT, Zhou YW, Wang WD, Mao BH, Hu YG.
europepmc +1 more source
[Comparative study on radio-opacity of dental composite resin materials'determination using film imaging and digital imaging]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2021 Li Y, Lin H, Zhang TJ.
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[Relationship Between Dynamic Compliance and Airway Resistance and Infection Indicators in Elderly Patients With Lung Infection After Radiotherapy for Esophageal Cancer]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2023 Tian Z, Tian W, Li H, Xue X, Zhao N.
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[Value of Blood Urea Nitrogen-to-Creatinine Ratio for Differentiating the Site of Gastrointestinal Bleeding and Assessing the Prognosis of Patients with Acute Nonvariceal Upper Gastrointestinal Bleeding]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2022 Feng JX +6 more
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