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Optimization strategies for Cd and Pb immobilization in soil using meta-analysis combined with numerical modeling

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Pedosphere 2023年第1期33卷 61-73页

作者： Shengqi QI huixing ji Dongsheng SHEN Yuqin MAO jiali SHENTU Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling Zhejiang Engineering Research Center of Non-ferrous Metal Waste RecyclingSchool of Environmental Science and EngineeringZhejiang Gongshang UniversityHangzhou 310012China Instrumental Analysis Center of Zhejiang Gongshang University Hangzhou 310012China College of Biology and Environmental Engineering Zhejiang Shuren UniversityHangzhou 310015China

Chemical immobilization is one of the most effective technologies for remediating sites with heavy metals,but the selection of proper immobilization material and determination of its dose ratio is a challenge that limits the remediation *** this study,we conducted a meta-analysis of 489 independent observations on the immobilization of heavy metals,in which the immobilization materials were divided into biochar,phosphate,lime,metal oxides,and clay *** statistical analysis of these observations revealed that the material dose ratio was the most important parameter that controlled immobilization efficiency,and the Freundlich adsorption model was successfully applied to calculate the bioavailable heavy metal(BHM)concentration after *** on the calculation results,phosphate was the most effective material for Pb *** was the most effective when the initial bioavailable Cd content was 0.1–1 mg kg^(-1),whereas the immobilization effects of lime and phosphate were similar when the initial bioavailable Cd content was 10 mg kg^(-1).In addition to the material dose ratio,initial soil pH(pHi)and organic matter(OM)content were negatively correlated,whereas the fraction of initial BHMs before immobilization(FB)and immobilization time were positively correlated with immobilization efficiency.A numerical model that considered the material dose ratio,pHi,OM,FB,and immobilization time was established to calculate the residual BHM concentration after ***,these factors only explained less than 45%of the immobilization effect,indicating that other factors,such as the sub-type of the material and modification methods,also affect the immobilization *** results could help to optimize the type of immobilization material of heavy metals and its dose ratio in practical engineering applications.

关键词： dose ratio heavy metal immobilization time remediation material soil characteristics

Laser Performance of Neodymium Doped Phosphate Glass Fiber Pumped by a 800 nm LD

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Chinese Journal of Lasers 1999年第5期8卷 3-5页

作者： ZHANG Junjie QI Changhong ji huixing LING Fengying HU Hefang(Shanghai Institute of Optics and Fine Mechanics,The Chinese Anademy of Science, Shanghai 201800, China)Absract: Single-mode Nd3+ -doped phosphate glass fiber with a core diameter of 8μm was 中科院上海光学精密机械所上海 201800 中科院上海光学精密机械所上海

Single transverse mode Nd3+-doped phosphate glass fiber with a core diameter of 8 μm was prepared by a conventional rod-in-tube method. Some laser properties of the fiber of 2 wt-% Nd2O3 doped and 0.68 m in length were measured using a Fabry-Perot cavity pumped with a laser-diode at 800 nm wavelength. Laser emission centered at the wavelength of 1.053 μm, and a 1.053 μm CW laser with output power of 8.36 mW and slope efficiency of 30.6% at room temperature was observed.

关键词： laser performance Nd3+ -doped phosphate glass fiber laser 800 nm LD pump

A New Neodymium∶Phosphate-glass Single Transverse Mode Fiber Laser with Double Clad Geometry

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Chinese Journal of Lasers 1998年第6期 86-89页

作者： FENG Xian QI Changhong ji huixing LIN Fengying HU Hefang (Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Scienices, Shanghai 201800, China)

１ＩｎｔｒｏｄｕｃｔｉｏｎＷｉｔｈｓｉｎｇｌｅｍｏｄｅｆｉｂｅｒｌａｓｅｒｓ，ｉｔｉｓｑｕｉｔｅｅａｓｙｔｏｇｅｎｅｒａｔｅｅｘｃｅｌｅｎｔｑｕａｌｉｔｙｂｅａｍｏｆｓｉｎｇｌｅｔｒａｎｓｖｅｒｓｅｍｏｄｅ［１，２］... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＷｉｔｈｓｉｎｇｌｅｍｏｄｅｆｉｂｅｒｌａｓｅｒｓ，ｉｔｉｓｑｕｉｔｅｅａｓｙｔｏｇｅｎｅｒａｔｅｅｘｃｅｌｅｎｔｑｕａｌｉｔｙｂｅａｍｏｆｓｉｎｇｌｅｔｒａｎｓｖｅｒｓｅｍｏｄｅ［１，２］，ｂｕｔｔｈｅｙｈａｖｅｂｅｅｎｇ...

关键词： single mode fiber Nd 3+ doped LD pumped

掺Nd^(3+)氟锆酸盐玻璃光纤的制备和性质

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硅酸盐学报 1998年第3期26卷 399-402页

作者：裔关宏胡和方刘创新籍惠兴中国科学院上海光学精密机械研究所

研究了掺Ｎｄ３＋氟锆酸盐玻璃光纤的制备方法，获得Ｎｄ３＋浓度为１×１０－３，芯径为９μｍ，外径为２００μｍ的双层玻璃包皮的氟锆酸盐玻璃光纤．在利用一个Ｆａｂｒｙ－Ｐｅｒｏｔ腔和５１４ｎｍ氩离子激光器作光泵源组成的光纤... 详细信息

研究了掺Ｎｄ３＋氟锆酸盐玻璃光纤的制备方法，获得Ｎｄ３＋浓度为１×１０－３，芯径为９μｍ，外径为２００μｍ的双层玻璃包皮的氟锆酸盐玻璃光纤．在利用一个Ｆａｂｒｙ－Ｐｅｒｏｔ腔和５１４ｎｍ氩离子激光器作光泵源组成的光纤激光器中，室温下已获得１．０５μｍ连续激光输出，输出功率为１１ｍＷ，斜率效率２０％．在信号源波长为１．３２７μｍ的半导体激光器和光泵波长为８００ｎｍ的钛宝石激光器组成的放大器上，获得８．５ｄＢ的增益．

关键词：钕离子氟锆酸盐玻璃光学纤维玻璃纤维

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细胞糖酵解对猪流行性腹泻病毒复制的影响

畜牧与兽医 2024年第3期56卷 113-117页

作者：吴冰季霖徐雅雯唐泰山杨龙圣何召庆范红结蔺辉星南京农业大学动物医学院江苏南京210095 南京海关动植物与食品检测中心江苏南京210019 兆丰华生物科技(南京)有限公司江苏南京211102

为研究猪流行性腹泻病毒(PEDV)感染细胞后,细胞糖酵解的变化及其对PEDV复制的影响,本试验通过实时荧光定量PCR和Western blot检测PEDV感染猪小肠上皮细胞IPEC-J2后36 h糖酵解相关酶己糖激酶2(HK2)的表达水平,然后通过添加糖酵解抑制剂2... 详细信息

为研究猪流行性腹泻病毒(PEDV)感染细胞后,细胞糖酵解的变化及其对PEDV复制的影响,本试验通过实时荧光定量PCR和Western blot检测PEDV感染猪小肠上皮细胞IPEC-J2后36 h糖酵解相关酶己糖激酶2(HK2)的表达水平,然后通过添加糖酵解抑制剂2-脱氧-D-葡萄糖(2-DG)来进一步验证细胞糖酵解对PEDV复制的影响,最后检测了正常浓度葡萄糖(5.5 mmol/L)和高浓度葡萄糖(11.1 mmol/L和22.2 mmol/L)培养条件下PEDV复制情况来探究葡萄糖浓度对PEDV复制的影响。结果表明,PEDV感染显著增加糖酵解限速酶HK2的表达,PEDV感染可增强IPEC-J2细胞的糖酵解,细胞糖酵解水平增强有利于PEDV的复制。在一定范围内提高葡萄糖浓度可促进PEDV复制。研究结果为初步阐明PEDV感染机制以及冠状病毒病的综合防控提供了理论依据。

关键词：猪流行性腹泻病毒糖酵解复制

Effects of Hypoxia on Oxidative Stress, Autophagy and Apoptosis in Cardiomyocytes

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Advances in Biological Chemistry 2019年第2期9卷 54-67页

作者： Qing-Min Feng Yang Shao Rong jiao Hong-Wei Wei Ming-Qiang Dai huixing Xie Caixia Xu ji-Ke Li Cardiovascular Center of Hainan Medical University The First Affiliated Hospital of Hainan Medical University Haikou China Hainan Medical University Haikou China

Coronary heart disease (CHD) is a hypoxia related disease. However, the relationship of the hypoxia-induced oxidative stress, autophagy and apoptosis in cardiomyocyte remains unclear. In this study, we used CoCl2 to mimic hypoxic conditions in H9c2 cardiomyocytes and study the effects of CoCl2-induced hypoxia on oxidative stress, apoptosis and autophagy, as well as the relationships among these processes. Cell viability and levels of ROS, LC3-II, p62, caspase-3 and PARP were assessed. The viability and morphology of cardiomyocytes were affected by hypoxia, and hypoxia enhanced levels of ROS and the levels of the LC3-II, p62, caspase-3 and PARP proteins in H9c2 cells in a dose-dependent manner. ROS levels rise gradually in the presence of hypoxia;however, it shrinks when hypoxia reaches a certain level. Caspase-3 and PARP levels were raised with the increasing of hypoxia level. Enhanced level of LC3 and decreased levels of p62 in hypoxic cells indicate that autophagy levels are in accord with hypoxia. Based on these results, hypoxia induces oxidative stress, apoptosis and autophagy in cardiomyocytes. Autophagy is a double-edged sword. At a low level, autophagy can resist oxidative stress and protect cardiomyocytes from oxidative stress, while high level autophagy can promote apoptosis of cardiomyocytes.

关键词： Hypoxia Oxidative Stress Autophagy Apoptosis Cardiomyocyte

基于可拓学模型的旅游上市公司财务评价系统研究

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价值工程 2010年第20期29卷 21-22页

作者：季婷聂会星徐枞巍合肥工业大学管理学院合肥230009

2010上海世博,成为推动中国旅游业发展的巨大引擎。旅游业面临全面标准化进程,其财务监控系统也将承受巨大考验。选择具有代表性的指标建立旅游业财务系统评价指标体系,采用层次分析法指定指标的权重,并以可拓学的多极物元为基本概念,... 详细信息

2010上海世博,成为推动中国旅游业发展的巨大引擎。旅游业面临全面标准化进程,其财务监控系统也将承受巨大考验。选择具有代表性的指标建立旅游业财务系统评价指标体系,采用层次分析法指定指标的权重,并以可拓学的多极物元为基本概念,构建评价模型,具有很强的实际应用价值。

关键词：旅游上市公司财务评价系统可拓学评价

^(99)Tc^(m)O^(-)_(4)SPECT/CT评估^(131)I治疗格雷夫斯病效果

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中国医学影像技术 2021年第12期37卷 1885-1889页

作者：邓惠兴吉婷王岐杨路路杨爱民西安交通大学第一附属医院核医学科陕西西安710061

目的观察^(99)Tc^(m)O^(-)_(4)SPECT/CT评估^(131)I治疗格雷夫斯病(GD)效果的价值。方法根据随访结果将44例接受^(131)I治疗的GD患者分为治愈组(n=20)、未愈组(n=9)和甲减组(n=15),观察各组治疗前、后^(99)Tc^(m)O^(-)_(4)SPECT/CT定量参数的差异,包括甲状腺体积、平均标准摄取值(SUV_(mean))、最大标准摄取值(SUV_(max))、锝摄取率及功能甲状腺质量(FTM),及其与总三碘甲腺原氨酸(TT_(3))、总甲状腺素(TT_(4))、游离三碘甲腺原氨酸(FT_(3))、游离甲状腺素(FT_(4))及促甲状腺素(TSH)水平的关系,并观察各参数评估^(131)I疗效的效能。结果治疗前,3组甲状腺体积及SUV_(mean)差异均有统计学意义(P均0.05)。治疗后,3组甲状腺体积、SUV_(mean)、SUV_(max)、锝摄取率及FTM差异均有统计学意义(P均0.05)。治疗前、后甲状腺24 h摄碘率差值与SUV_(mean)差值及SUV_(max)差值均呈极强正相关(r=0.86、0.84,P均<0.05),与FTM差值呈中度正相关(r=0.46,P<0.05),而与锝摄取率差值呈弱正相关(r=0.38,P<0.05)。治疗前、后甲状腺体积差值与TT_(3)差值呈弱正相关(r=0.37,P<0.05),而与FT_(3)差值呈中度正相关(r=0.43,P<0.05)。治疗前SUV mean、SUV_(max)和锝摄取率判断^(131)I治疗有效的曲线下面积(AUC)分别为0.84、0.74和0.85;治疗后,甲状腺体积、SUV_(mean)、SUV_(max)、锝摄取率及FTM较治疗前变化百分比的AUC分别为0.76、0.92、0.94、0.95及0.96,最佳截断值分别为34.50%、18.50%、24.50%、55.00%和53.00%。结论^(99)Tc^(m)O^(-)_(4)SPECT/CT定量参数甲状腺体积、SUV_(mean)、SUV_(max)、锝摄取率和FTM评估^(131)I治疗GD效果具有一定价值。

关键词：格雷夫斯病锝体层摄影术,发射型计算机,单光子体层摄影术,X线计算机

淬火温度对5Cr15MoV钢空冷淬火组织与性能的影响

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金属热处理 2022年第8期47卷 211-216页

作者：田春英董纪王军张慧星冯天建刘晓凡天津中德应用技术大学机械工程学院天津300350 天津中德应用技术大学航空航天学院天津300350 天津市信泰科技发展有限公司天津300383

通过1000~1200℃间隔50℃的系列加热温度对5Cr15MoV马氏体不锈钢进行空冷淬火试验,并采用光学显微镜、EBSD和洛氏硬度计对不同温度淬火后组织和硬度进行检测,研究了淬火温度对试验钢组织、晶粒尺寸、残留奥氏体含量以及硬度的影响。结... 详细信息

通过1000~1200℃间隔50℃的系列加热温度对5Cr15MoV马氏体不锈钢进行空冷淬火试验,并采用光学显微镜、EBSD和洛氏硬度计对不同温度淬火后组织和硬度进行检测,研究了淬火温度对试验钢组织、晶粒尺寸、残留奥氏体含量以及硬度的影响。结果表明,试验钢淬火后组织为马氏体+未溶合金碳化物+残留奥氏体。随着淬火温度升高,马氏体板条尺寸增大,未溶碳化物量逐渐减少直至消失,残留奥氏体含量先增加后减少。试验钢的硬度变化趋势为先增加后显著降低,在淬火温度为1050℃达到最大值60.8 HRC。试验钢硬度主要是马氏体的含碳量、晶粒尺寸、残留奥氏体含量和碳化物含量综合作用的结果。

关键词： 5Cr15MoV钢空冷淬火淬火温度组织硬度