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某电子企业职业人群有机物暴露健康风险评估

环境科学研究 2024年第3期37卷 616-625页

作者：王丹璐郭溪香王梦晨朱婷婷赵秀阁申芝芝胡蓉齐秀娟刘怡虹中国环境科学研究院环境基准与风险评估国家重点实验室北京100012 深圳市环境科学研究院国家环境保护饮用水水源地管理重点实验室深圳市水环境中新型污染物检测与控制重点实验室广东深圳518001 兰州大学资源环境学院甘肃兰州730000

随着电子行业从业人群在新发职业病例中占比的增加,其健康问题及潜在健康风险已经引起广泛关注.本文基于深圳市某电子企业各工位有机污染物的监测结果,采用半定量和定量健康风险评估的方法,就其健康风险水平进行评价和探讨,结果表明:①... 详细信息

随着电子行业从业人群在新发职业病例中占比的增加,其健康问题及潜在健康风险已经引起广泛关注.本文基于深圳市某电子企业各工位有机污染物的监测结果,采用半定量和定量健康风险评估的方法,就其健康风险水平进行评价和探讨,结果表明:①调查企业各工位所检测的有机物浓度均低于其相应的职业接触限值,但乙醛、三氯乙烯、二甲苯等污染物的非致癌风险危害商均大于1,仍会产生较高的潜在非致癌健康风险.②健康风险评价结果表明,喷码、丝印、封装和浸锡等工位污染物的危害指数在2.52~129.14之间,导致其从业人员健康风险水平较高.③受到污染物浓度和危害等级的影响,半定量风险评估与定量风险评估结果之间存在差异.④不同评估方法具有其自身的优势和局限性,采用单一的评估方法会造成评估结果的偏差.研究显示:电子企业部分有机污染物低浓度可带来一定的潜在健康风险,应加强有效防护措施;同时,应结合多种评估方法开展健康风险评估,以获得更加全面和客观的评估结果,为实施高效的环境健康管理提供参考.

关键词：电子企业有机物职业人群健康风险

Accelerated plasma degradation of organic pollutants in milliseconds and examinations by mass spectrometry

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Chinese Chemical Letters 2021年第11期32卷 3457-3462页

作者： Hua Lu Yiyan Yin Jianghui Sun Weixiang Li Xiaotong shen xiujuan Feng Jin Ouyang Na Na Key Laboratory of Radiopharmaceuticals Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100085China School of Life Science Beijing Institute of TechnologyBeijing 100081China School of Mines China University of Mining&TechnologyBeijing 100085China

The rapid degradation of organic pollutants,process monitoring and online controlling to obtain advanced products and decreased by-products are great and challenging tasks in environmental ***,an accelerated plasma degradation in milliseconds was achieved by combining electrospray-based acceleration and plasma-based *** the degradation of chloroaniline as an example,97%of the degradation can be achieved in *** velocity distribution of droplets was determined to be 40-50 m/s after being degraded for 0.30 ms,which exhibited different degradation behaviors in different ***,by virtue of the real-time and on-line detection ability of ambient mass spectrometry,intermediates,by-products and advanced products were ***,degradation mechanisms for different degradation times were proposed,which would provide theoretical guidance on obtaining efficient and green *** fabrication,examining and understanding of accelerated plasma degradation not only enlarged application of accelerated reactions,but also promoted green and efficient degradation for environmental treatments.

关键词： Accelerated plasma degradation Organic pollutants Milliseconds Intermediates Ambient mass spectrometry Degradation Mechanisms

PD-L1在三阴性乳腺癌中的表达及临床病理意义

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浙江医学 2024年第19期46卷 2089-2092,2098页

作者：姚秀娟许建秋周泉沈文艳嘉兴市第二医院病理科 314000

目的探讨细胞程序性死亡配体1(PD-L1)在三阴性乳腺癌(TNBC)间质浸润免疫细胞中的表达及其临床病理意义。方法选取2017年1月至2019年12月嘉兴市第二医院经外科手术切除的77例TNBC组织(TNBC组)及80例非三阴性乳腺癌组织(非TNBC组),采用... 详细信息

目的探讨细胞程序性死亡配体1(PD-L1)在三阴性乳腺癌(TNBC)间质浸润免疫细胞中的表达及其临床病理意义。方法选取2017年1月至2019年12月嘉兴市第二医院经外科手术切除的77例TNBC组织(TNBC组)及80例非三阴性乳腺癌组织(非TNBC组),采用免疫组化法检测PD-L1在两种组织间质浸润免疫细胞中的表达,并分析其与临床病理特征的关系。结果 PD-L1在TNBC组间质浸润免疫细胞中的阳性表达率(40.3%)显著高于非TNBC组(16.3%),差异有统计学意义(P<0.05)。不同组织学级别、淋巴结转移、Ki-67表达以及间质浸润免疫细胞密度TNBC患者PD-L1阳性表达率比较,差异均有统计学意义(均P<0.05)。结论 TNBC患者间质浸润免疫细胞中PD-L1阳性表达率显著高于非TNBC患者,PD-L1表达与TNBC患者组织学级别、淋巴结转移、Ki-67表达以及间质浸润免疫细胞密度等临床病理特征有关。

关键词：三阴性乳腺癌间质浸润免疫细胞免疫组化细胞程序性死亡-配体1

陕西汉中地区大米中放射性水平及其内照射剂量估算

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辐射防护 1987年第4期 312-319页

作者：王亮侯振海谷雅琴沈秀娟石本安王建设沈荣祖杜白则陕西省预防医学研究所陕西省预防医学研究所

本文给出了陕西省汉中地区大米中 U、Th、226Ra、40K、90Sr、137Cs 和总β水平,并进行了内照射剂量估算。结果表明,该地区大米中天然放射性水平均在正常本底范围内,食用大米所致居民年有效剂量当量约为9.36μSv

关键词：天然放射性水平剂量估算大米陕西汉中地区

Ultrahigh energy harvesting properties in Ag decorated potassium-sodium niobite particle-polymer composite

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Journal of Materiomics 2020年第2期6卷 355-363页

作者： Yu Huan Tao Wei Zhenxing Wang Hengtao shen xiujuan Lin Shifeng Huang Xiaohui Wang a School of Material Science and Engineering University of JinanJinan250022China Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan250022China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Composite-type piezoelectric nanogenerator(PENG)can potentially provide power to the flexible electronics devices by harvesting the mechanical *** electricity output of the PENG is not entirely excavated until now because the polarization dipoles are not sufficiently aligned during the high-voltage poling *** this study,some Ag particles are attached on the(K_(0.4425)Na_(0.52)Li_(0.0375))(Nb_(0.86)Ta_(0.06)Sb_(0.08))O_(3)(KNN)piezoelectric particles and then they are mixed with multi-walled carbon nanotubes and polydimethylsiloxane to fabricate the PENG *** Ag particles can reduce the optimal poling electric field from 10 kV/mm down to 5 kV/*** PENG device with Ag particles poled at 5 kV/mm can generate the highest open-circuit voltage of 282 V,short-circuit voltage of 32.2 mA,and maximum instantaneous power of 3.5mW under the external mechanical stress of 10 kPa without timedependent degradation(only 27.9 V and 2.6 mA for the pure KNN-based PENG poled at 10 kV/mm).These are much better than previously reported composite-type *** electrical energy generated from the PENG(20mm×40 mm)can light up 40 white light emitting diodes instantaneously without any storage unit during the stomping stage.

关键词： Composite-type piezoelectric energy harvester Lead-free piezoelectric materials Ultrahigh electrical output Low poling electric field

THE DISCUSSION ON THE MEASURES OF INCREASING NURSERY STOCK QUALITY IN FRIGID REGION OF CHINA

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Journal of Northeast Forestry University 1993年第2期4卷 43-50页

作者： Qi Mingcong shen Hailong Northeast Forestry University Yang xiujuan Museum of Heilongjiang Province Northeast Forestry University China Museum of Heilongjiang Province China

Through several years seedling-growing experiments in nursery in Daxing‘anMountains forest region,the author posed that the seedling cultivated for the region mustpossess the characteristics of being suited to thin and meager soil and having strongresistance to adverse *** this purpose,the cultivation regime ought to bedirectization,standardization and programmatization;seedling growth ought to be promotedby regulating ecological conditions;and the mursery stock quality ought to be tested usingvigor index.

关键词： Seedling-growing measure Frigid region Nursery stock quality

烷烃溶剂/CO_(2)/稠油体系中泡沫油研究进展

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化学世界 2024年第4期65卷 195-204页

作者：裘鋆沈之芹何秀娟崔乐雨虞辰敏中石化(上海)石油化工研究院有限公司中石化三采用表面活性剂重点实验室上海201208

泡沫油流是一次采油(天然甲烷气饱和的稠油衰减开采)和二次开采(一次采油后注入循环气体)中关键的驱油机理。相比一次采油,气体(也称溶剂)类型和用量影响至关重要。泡沫油稳定性与溶解气体组成、稠油黏度、温度、溶解气体比和压力衰竭... 详细信息

泡沫油流是一次采油(天然甲烷气饱和的稠油衰减开采)和二次开采(一次采油后注入循环气体)中关键的驱油机理。相比一次采油,气体(也称溶剂)类型和用量影响至关重要。泡沫油稳定性与溶解气体组成、稠油黏度、温度、溶解气体比和压力衰竭率等因素密切相关。尽管综述和分析了不同参数下泡沫油形成过程,但尚未完全了解采油(如,循环溶剂注入(CSI))过程中其形成的最佳条件。总结了影响泡沫油性能的内外部气体驱动机理,对于不同气体,CO_(2)饱和稠油形成的泡沫油比甲烷形成的泡沫油质量更好,这是因为稠油中CO_(2)解吸速度更加缓慢。讨论了CO_(2)与其它气体、化学剂或驱油技术组合作为强化循环溶剂注入(ECSI)的实例,以及克服CSI过程引起的原油黏度升高等问题,展望了CO_(2)在稠油开采领域的应用。

关键词：烷烃溶剂 CO_(2) 稠油泡沫油循环溶剂注入(CSI)

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耐油泡排剂Facam的制备和性能研究

化学反应工程与工艺 2024年第3期40卷 234-241页

作者：裘鋆何秀娟许鑫许剑沈之芹李应成中石化(上海)石油化工研究院有限公司中国石化三采用表面活性剂重点实验室上海201208 中国石油化工股份有限公司西南油气分公司采气三厂四川德阳618000 中国石油化工股份有限公司西南油气分公司石油工程技术研究院四川德阳618000

为提高凝析气井的泡沫排液效果,研制阴离子、阳离子与两性表面活性剂三元复配耐油泡排剂(Facam),采用泡沫仪、界面张力仪、黏度仪等测试其泡沫性能、耐油性能和泡沫乳液黏度,并应用于凝析气井排液采气作业。结果显示,与两性表面活性剂(L... 详细信息

为提高凝析气井的泡沫排液效果,研制阴离子、阳离子与两性表面活性剂三元复配耐油泡排剂(Facam),采用泡沫仪、界面张力仪、黏度仪等测试其泡沫性能、耐油性能和泡沫乳液黏度,并应用于凝析气井排液采气作业。结果显示,与两性表面活性剂(LB1)相比,油滴在Facam液膜上的铺展系数小于0,表明在高含凝析油条件下Facam的泡沫稳定性得到提高,同时,Facam产生的乳液黏度较低,可降低由摩擦阻力损失引起的油管压降。现场气井注入Facam后,油套压差(ΔP_(c-t))从1.00 MPa降低到0.28 MPa,产气月度递减率降低到2.86%,排液采气效果优于LB_(1),有效保证气井稳产。

关键词：耐油泡排剂气井排液采气凝析油乳液黏度

BAF45D regulates spinal cord neural stem/progenitor cell fate through the SMAD-PAX6 axis

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Genes & Diseases 2023年第2期10卷 366-369页

作者： Xueying Chen xiujuan Hu Jing Jiang Jie Tao Lihua Liu shengyun Fang Yuxian shen Qingsong Hu Chao Liu School of Basic Medical Sciences Anhui Medical UniversityHefeiAnhui 230032China Department of Histology and Embryology Institute of Stem Cell and Tissue EngineeringAnhui Medical UniversityHefeiAnhui 230032China Division of Life Sciences and Medicine University of Science and Technology of ChinaThe First Affiliated Hospital of USTCHefeiAnhui 230001China Institute of Clinical Pharmacology Anhui Medical UniversityHefeiAnhui 230032China Center for Biomedical Engineering and Technology University of MarylandBaltimoreMD 21201USA

Mutations in BRG1-associated factor 45D (BAF45D, also known as double PHD fingers 2 (DPF2)) are linked to Coffin-Siris syndrome (CSS).1 However, the underlying molecular mechanisms remain ill-defined. Here, we identified that wild-type but not CSS-associated BAF45D mutants increased the expression of PAX6,2 a neural stem cell marker, and phosphorylated SMAD3 (p-SMAD3) in spinal cord neural stem cells (NSCs) derived from H9 human embryonic stem cells. Both BAF45D and SMAD3 are required for the induction of p-SMAD3 and PAX6 together with STAT3 and SMAD7 by retinoic acid (RA). In the presence of RA, BAF45D knockdown decreased the expression of genes that regulate stem cell pluripotency. Moreover, the same genes in the spinal cord NSCs had more binding sites with BAF45D than those in H9 cells. Furthermore, Gene Ontology (GO) assay results indicated that BAF45D targets more pathways responsible for stem cell maintenance in NSCs. Finally, BAF45D is associated with BRG1, p-SMAD3, and PAX6. Together, these findings suggest a role for BAF45D in modulating PAX6 expression through SMAD signaling, highlighting the importance of BAF45D in neural stem/progenitor cell fate commitment.

关键词： PAX6 progenitor SMAD