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腾冲火成岩分布地区流域重金属元素迁移富集规律

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地球学报 2024年第4期45卷 623-636页

作者：赵忠强夏顶洪张佳琳李振阳曾丽源宋垠先何洪鸣陈忠昆明理工大学国土资源工程学院云南昆明650093 华东师范大学地理科学学院上海200241 中国科学院水利部水土保持研究所陕西杨凌712100

环境中的重金属污染一般与人类活动有关,但流域内自然来源的重金属影响也不容忽视。火成岩分布地区的地质高背景往往含有较高的过渡金属元素,其中以Cr、Ni、Cu含量较高,主要赋存在流域内的土壤和沉积物中,其对流域生态环境会造成持续性... 详细信息

环境中的重金属污染一般与人类活动有关,但流域内自然来源的重金属影响也不容忽视。火成岩分布地区的地质高背景往往含有较高的过渡金属元素,其中以Cr、Ni、Cu含量较高,主要赋存在流域内的土壤和沉积物中,其对流域生态环境会造成持续性危害。为了解火成岩地区土壤和沉积物的重金属元素的迁移富集规律,为治理环境污染,保护人类生活环境提供一定意义的科学认识和参考依据。本研究以云南腾冲火成岩分布地区的龙川江和沙河两个流域为研究对象,系统采集基岩、土壤和沉积物样品进行研究。结果表明:两个流域内沉积物和土壤的矿物组成主要有石英、长石、黏土矿物及少量碳酸盐,风化过程中随长石的减少,黏土类矿物显著增加,重金属元素也随黏土矿物的增加而富集,Cr、Ni在土壤中富集,与总黏土矿物含量呈线性关系(Cr:R^(2)=0.3817;Ni:R^(2)=0.5797),沉积物中Cr、Ni、Zn、Pb含量与高岭石、云母和伊利石混层的含量呈线性关系(R^(2)=0.43~0.72)。重金属Cu、Zn、Pb在沉积物中富集,其传质系数在龙川江沉积物中与高岭石、云母和伊利石混层的含量呈线性关系(R^(2)=0.58~0.79)。黏土类矿物对重金属元素的富集和迁移具有重要作用。

关键词：云南腾冲重金属迁移富集土壤沉积物

维普期刊数据库博看期刊

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黄土高原新近纪红粘土粒度特征及环境意义

高校地质学报 2023年第5期29卷 713-725页

作者：路珂珂陈忠杨雁鹏张佳琳赵忠强夏顶洪倪春中宋垠先张世涛昆明理工大学国土资源工程学院昆明650093

黄土高原红粘土的风成成因已得到一致的认可,目前发现最早的红粘土出现在渐新世末中新世初,表明古近纪末中国西北内陆地区干旱化环境就已形成。黄土高原红粘土的粒度特征显示自北而南平均粒径逐渐减小,表明了初始的季风系统已经建立,冬... 详细信息

黄土高原红粘土的风成成因已得到一致的认可,目前发现最早的红粘土出现在渐新世末中新世初,表明古近纪末中国西北内陆地区干旱化环境就已形成。黄土高原红粘土的粒度特征显示自北而南平均粒径逐渐减小,表明了初始的季风系统已经建立,冬季风对风尘物质的传输具有重要作用。红粘土的粒度分布曲线显示其有两个组分组成,其中粗粒(>20μm)代表了近地面风(冬季风)传输部分,而细粒(<5μm)代表了高空西风传输部分,粒度组成特征很好地记录了大气环流的发展变化。自渐新世末,六盘山以西的红粘土显示在21.3~20.2Ma、16.0~13.3Ma和8.7~6.9Ma三个时期平均粒径增大,沉积速率升高,其可能与全球变冷和青藏高原阶段性隆升有关,其中8.7~6.9 Ma主要受全球变冷控制。而六盘山以东的红粘土剖面,粒度变化特征显示在7.6~6.2 Ma,或至5.4 Ma粒径都较粗,表明冬季风较强;之后至3.6 Ma平均粒径较细,沉积速率较低,指示了冬季风发育较弱,为气候环境较好的阶段;从3.6~2.6 Ma,大多数剖面都显示平均粒径增大,沉积速率增加,冬夏季风同时增强,进入向第四纪冰期过渡的阶段。北极冰盖的发育、青藏高原的隆升可能是产生变化的原因。

关键词：粒度红粘土黄土高原冬季风环境意义

Photoreductive degradation of sulfur hexafluoride in the presence of styrene

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Journal of Environmental Sciences 2008年第2期20卷 183-188页

作者： HUANG Li GU dinghong Yang Longyu xia Lanyan ZHANG Renxi HOU Huiqi Institute of Environmental Science Fudan University Shanghai 200433 China

Sulfur hexafluoride （SF6） is known as one of the most powerful greenhouse gases in the atmosphere. Reductive photodegradation of SF6 by styrene has been studied with the purpose of developing a novel remediation for sulfur hexafluoride pollution. Effects of reaction conditions on the destruction and removal efficiency （DRE） of SF6 are examined in this study. Both initial styrene-to-SF6 ratio and initial oxygen concentration exert a significant influence on DRE. SF6 removal efficiency reaches a maximum value at the initial styrene-to-SF6 ratio of 0.2. It is found that DRE increases with oxygen concentration over the range of 0 to 0.09 mol/m^3 and then decreases with increasing oxygen concentration. When water vapor is fed into the gas mixture, DRE is slightly enhanced over the whole studied time scale. The X-ray Photoelectron Spectroscopy （XPS） analysis, together with gas chromatography-mass spectrometry （GC-MS） and Fourier Transform Infrared spectroscopy （FT-IR） analysis, prove that nearly all the initial fluorine residing in the gas phase is in the form of SiF4, whereas, the initial sulfur is deposited in the form of elemental sulfur, after photodegradation. Free from toxic byproducts, photodegradation in the presence of styrene may serve as a promising technique for SF6 abatement.

关键词： SF6 184.9 nm irradiation styrene reductive radicals photodegradation

Identification of microRNA transcriptome reveals that miR-100 is involved in the renewal of porcine intestinal epithelial cells

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Science China(Life Sciences) 2019年第6期62卷 816-828页

作者： Lijun Zou xia Xiong Huansheng Yang Kexing Wang Jian Zhou dinghong Lv Yulong Yin Hunan International Joint Laboratory of Animal Intestinal Ecology and Health School of Life Sciences Hunan Normal University Changsha 410081 China Key Laboratory for Agro-Ecological Processes in Subtropical Regions Institute of Subtropical Agriculture the Chinese Academy of Sciences Changsha 410125 China Laboratory of Basic Biology Hunan First Normal University Changsha 410205 China

MicroRNAs play important roles in various cellular processes, including differentiation, proliferation and survival. Using a pig model, this study sought to identify the miRNAs responsible for crypt-villus axis renewal of the small intestinal *** to the villus upper cells, there were 15 up-regulated and 41 down-regulated miRNAs in the crypt cells of the ***, we found that miR-100 was expressed more in the villus upper cells than in the crypt cells, suggesting an effect on intestinal epithelium differentiation. Overexpression of miR-100 increased the activity of alkaline phosphatase, confirming that miR-100 promoted IPEC-J2 cell differentiation. MiR-100 can inhibit cell proliferation as evidenced by CCK-8 and cell cycle assay results. We also showed that miR-100 significantly inhibited the migration of IPEC-J2 cells and promoted cell apoptosis through caspase-3-dependent cleavage of Bcl-2. Furthermore, FGFR3 was identified as a potential target of miR-100 by bioinformatics analysis. We confirmed that overexpression of miR-100 suppressed FGFR3 expression in IPEC-J2 cells by directly targeting the FGFR3 3′-UTR. This is the first report of miRNAs acting on the renewal of the intestinal crypt-villus *** results also showed that miR-100 promotes the differentiation and apoptosis, and inhibits the proliferation and migration of enterocytes of pigs.

关键词： MicroRNAs suckling piglets crypt-villus axis cell renewal IPEC-J2 cells

Effect of dietary soy oil, glucose, and glutamine on growth performance, amino acid profile, blood profile, immunity, and antioxidant capacity in weaned piglets

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Science China(Life Sciences) 2018年第10期61卷 1233-1242页

作者： dinghong Lv xia Xiong Huansheng Yang Meiwei Wang Yijie He Yanhong Liu Yulong Yin Hunan International Joint Laboratory of Animal Intestinal Ecology and Health Laboratory of Animal Nutrition and Human Health College of Life Sciences Hunan Normal UniversityChangsha 410006China Key Laboratory of Agro-ecological Processes in Subtropical Region Laboratory of Animal Nutritional Physiology and Metabolic ProcessHunan Provincial Engineering Research Center of Healthy Livestock Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central Ministry of Agriculture Institute of Subtropical Agriculture Chinese Academy of SciencesChangsha 410125China Department of Animal Science University of CaliforniaDavis 95616 USA

Weaning stress results in gastrointestinal dysfunction and depressed performance in pigs. This study aimed to investigate the effect of soy oil, glucose, and glutamine on the growth and health of weaned piglets. Compared with those in the glutamine group, piglets in the glucose and soy oil groups had greater average daily gain, average daily feed intake, and gain: feed ratio from day 0 to 14, and gain: feed ratio for the overall period. There were no differences with regard to serum amino acids among the three groups on day 14, except glycine and threonine. The serum concentration of histidine, serine, threonine, proline, and cysteine was the highest in the glutamine group, while the content of glycine and lysine in the soy oil group on day 28 was the highest among all groups. Piglets fed with glutamine had greater serum glucose and creatinine on day 14, high-density lipoprotein on day 28, and serum IgG and IgM on day 28. Piglets in the glutamine group demonstrated lower serum total superoxide dismutase on day 14 and 28; however, they demonstrated higher total superoxide dismutase and total antioxidant capacity in the duodenum and ileum on day 14. Weaned pigs supplemented with glucose or soy oil demonstrate better growth performance possibly due to their enhanced feed intake, whereas those supplemented with glutamine may have improved immunity and intestinal oxidative capacity.

关键词： glucose glutamine soy oil

应激和某些疾病状态下猪肠道差异蛋白质表达的研究进展

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动物营养学报 2016年第12期28卷 3742-3748页

作者：吕定红熊霞王小城杨焕胜李建中印遇龙湖南师范大学生命科学学院动物营养与人体健康实验室长沙410006 中国科学院亚热带农业生态研究所中国科学院亚热带农业生态过程重点实验室长沙410125

肠道不仅是营养物质消化吸收的主要器官,也是机体最大的免疫器官。蛋白质是生命活动的执行者,肠道功能的改变通常伴随着蛋白质表达、修饰或稳定性的改变。近年来,随着蛋白质组学技术的蓬勃发展,蛋白质组学在动物科学领域被广泛应用。本... 详细信息

肠道不仅是营养物质消化吸收的主要器官,也是机体最大的免疫器官。蛋白质是生命活动的执行者,肠道功能的改变通常伴随着蛋白质表达、修饰或稳定性的改变。近年来,随着蛋白质组学技术的蓬勃发展,蛋白质组学在动物科学领域被广泛应用。本文主要围绕应激和某些疾病状态下猪肠道差异蛋白质表达的研究进展进行简要阐述。

关键词：猪蛋白质组学肠道应激疾病

Efficacy,safety and immunogenicity of hexavalent rotavirus vaccine in Chinese infants

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Virologica Sinica 2022年第5期37卷 724-730页

作者： Zhiwei Wu Qingliang Li Yan Liu Huakun Lv Zhaojun Mo Fangjun Li Qingchuan Yu Fei Jin Wei Chen Yong Zhang Teng Huang xiaosong Hu Wei xia Jiamei Gao Haisong Zhou Xuan Bai Yueyue Liu Zhenzhen Liang Zhijun Jiang Yingping Chen Jiuwei Zhang Jialiang Du Biao Yang Bo Xing Yantao Xing Ben Dong Qinghai Yang Chen Shi Tingdong Yan Bo Ruan Haiyun Shi Xingliang Fan Dongyang Feng Weigang Lv Dong Zhang xiangchu Kong Liuyifan Zhou dinghong Que Hong Chen Zhongbing Chen xiang Guo Weiwei Zhou Cong Wu Qingrong Zhou Yuqing Liu Jian Qiao Ying Wang Xinguo Li Kai Duan Yuliang Zhao Gelin Xu xiaoming Yang Hebei Center for Disease Control and Prevention Shijiazhuang050021China National Engineering Technology Research Center for Combined Vaccines Wuhan Institute of Biological Product Co.Ltd.Wuhan430207China National Institutes for Food and Drug Control Beijing100050China Zhejiang Center for Disease Control and Prevention Hangzhou310051China Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention Nanning530028China Hunan Center for Disease Control and Prevention Changsha410005China Zhengding County Center for Disease Control and Prevention Shijiazhuang050800China Daming County Center for Disease Control and Prevention Handan056900China Liucheng County Center for Disease Control and Prevention Liuzhou545200China xiangtan County Center for Disease Control and Prevention Xiangtan411228China Yuhuan County Center for Disease Control and Prevention Taizhou317600China Yongnian County Center for Disease Control and Prevention Handan056000China Rongshui Miao Autonomous County Center for Disease Control and Prevention Liuzhou545300China You County Center for Disease Control and Prevention Zhuzhou412315China Longyou County Center for Disease Control and Prevention Quzhou324400China Laishui County Center for Disease Control and Prevention Baoding 074100China Jiangshan County Center for Disease Control and Prevention Quzhou324100China China National Biotec Group Company Limited National Engineering Technology Research Center for Combined VaccinesWuhan430207China

A randomized,double-blind,placebo-controlled multicenter trial was conducted in healthy Chinese infants to assess the efficacy and safety of a hexavalent live human-bovine reassortant rotavirus vaccine(HRV)against rotavirus gastroenteritis(RVGE).A total of 6400 participants aged 6-12 weeks were enrolled and randomly assigned to either HRV(n?3200)or placebo(n?3200)*** the subjects received three oral doses of vaccine four weeks *** vaccine efficacy(VE)against RVGE caused by rotavirus serotypes contained in HRV was evaluated from 14 days after three doses of administration up until the end of the second rotavirus *** against severe RVGE,VE against RVGE hospitalization caused by serotypes contained in HRV,and VE against RVGE,severe RVGE,and RVGE hospitalization caused by natural infection of any serotype of rotavirus were also *** adverse events(AEs)were collected for 30 days after each *** AEs(SAEs)and intussusception cases were collected during the entire *** data showed that VE against RVGE caused by serotypes contained in HRV was 69.21%(95%CI:53.31-79.69).VE against severe RVGE and RVGE hospitalization caused by serotypes contained in HRV were 91.36%(95%CI:78.45-96.53)and 89.21%(95%CI:64.51-96.72)*** against RVGE,severe RVGE,and RVGE hospitalization caused by natural infection of any serotype of rotavirus were 62.88%(95%CI:49.11-72.92),85.51%(95%CI:72.74-92.30)and 83.68%(95%CI:61.34-93.11).Incidences of AEs from the first dose to one month post the third dose in HRV and placebo groups were *** was no significant difference in incidences of SAEs in HRV and placebo *** study shows that this hexavalent reassortant rotavirus vaccine is an effective,well-tolerated,and safe vaccine for Chinese infants.

关键词： Rotavirus gastroenteritis(RVGE) Infants Vaccine Efficacy Safety

硬膜外镇痛、腹横肌平面阻滞联合全麻在结直肠癌根治术中的应用对比研究

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中国煤炭工业医学杂志 2022年第5期25卷 531-535页

作者：郭霞阮定红任青竹徐川云重庆市大足区人民医院麻醉科 402360

目的分析硬膜外镇痛、腹横肌平面阻滞联合全麻在结直肠癌根治术中的应用效果。方法 2019年6月—2021年6月于本院接受结直肠癌根治术治疗的患者85例,根据随机数字表法分为对照组(腹横肌平面阻滞联合全麻,n=41)和研究组(硬膜外镇痛联合全... 详细信息

目的分析硬膜外镇痛、腹横肌平面阻滞联合全麻在结直肠癌根治术中的应用效果。方法 2019年6月—2021年6月于本院接受结直肠癌根治术治疗的患者85例,根据随机数字表法分为对照组(腹横肌平面阻滞联合全麻,n=41)和研究组(硬膜外镇痛联合全麻,n=44)。对比二组术后恢复相关指标、疼痛情况[视觉模拟量表(visual analogue scale,VAS)]、应激指标[晚期氧化蛋白产物(advanced oxidation protein products,AOPPs)、肾上腺素(Epinephrine,E)、过氧化氢酶(catalase,CAT)]及不良反应。结果研究组苏醒时间、肛门排气时间、下床活动时间皆短于对照组(P0.05)。术后各组VAS评分均随着时间推移下降(P0.05)。结论结直肠癌根治术采取硬膜外镇痛联合全麻有利于患者术后恢复,且术后镇痛效果显著,有利于效减轻患者应激反应。

关键词：硬膜外镇痛结直肠癌根治术 AOPPs 腹横肌平面阻滞

胃癌根治术患者给予磷酸肌酸钠氯化钠注射液预处理的临床观察

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中国药师 2019年第2期22卷 275-278页

作者：郭霞陈诚阮定红刘永强任青竹重庆市大足区人民医院麻醉科重庆402360

目的:研究胃癌根治术患者给予磷酸肌酸钠氯化钠注射液预处理的临床效果。方法:我院75例行胃癌根治术的患者随机分为观察组和对照组,手术麻醉前观察组患者给予磷酸肌酸钠2 g溶入0. 9%氯化钠注射液100 ml中静滴进行预处理,对照组给予等量... 详细信息

目的:研究胃癌根治术患者给予磷酸肌酸钠氯化钠注射液预处理的临床效果。方法:我院75例行胃癌根治术的患者随机分为观察组和对照组,手术麻醉前观察组患者给予磷酸肌酸钠2 g溶入0. 9%氯化钠注射液100 ml中静滴进行预处理,对照组给予等量氯化钠注射液。在手术过程不同时段抽取两组患者静脉血,测定血糖(BG)、胰岛素(IOB)、胰高血糖素(GCG)、皮质醇值(COL);比较两组患者不同时段血压(MAP)、心排血量(CO)、每搏输出量(SV)、左心室舒张末期容积(LVEDV)水平变化,以及两组患者药品不良反应发生情况。结果:观察组总有效率明显高于对照组(P <0. 05)。手术过程中两组患者血糖均有升高但对照组处于更高状态(P <0. 05); IOB水平先下降然后逐渐升高直到拔管后再逐渐降低,COL与GCG均有不同程度的升高,观察组低于对照组(P <0. 05)。手术过程中对照组血压一直处于升高状态,观察组血压低于对照组且在正常范围内(P <0. 05),观察组在气管插管时、开腹时以及手术结束时CO、SV明显高于对照组(P <0. 05),而在手术结束时LVEDV明显低于对照组(P <0. 05)。结论:对于进行胃癌根治术患者,术前使用磷酸肌酸钠预处理能使应激性高血糖反应风险降低,并且能改善患者术中循环功能,使血压处于平稳状态,有利于预后。

关键词：磷酸肌酸钠胃癌根治术糖代谢循环功能