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官厅水库氟化物分析

北京水务 2024年第S1期 45-49页

作者：王秋生白璇赵元元程卫华常帅北京市官厅水库管理处河北张家口075441

氟化物是官厅水库及上游流域的主要污染物,通过2013—2023年的数据分析,对库区水质评价结果、库区氟化物时空分布、上游河流输入对氟化物影响及黄河输水对氟化物的影响开展分析,结果表明:引黄工程向官厅水库补水后,氟化物浓度持续好转,... 详细信息

氟化物是官厅水库及上游流域的主要污染物,通过2013—2023年的数据分析,对库区水质评价结果、库区氟化物时空分布、上游河流输入对氟化物影响及黄河输水对氟化物的影响开展分析,结果表明:引黄工程向官厅水库补水后,氟化物浓度持续好转,氟化物浓度永定河库区低于妫水河库区,洋河入库氟化物高是官厅库区氟化物高的主要原因之一。研究结果为流域污染治理和水源地保护工作提供支撑,进一步促进水资源的可持续利用。

关键词：官厅水库氟化物时空分布

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1ZL-7.2型联合整地机的研制

安徽农业科学 2024年第1期52卷 199-201,221页

作者：张鲁云杨怀君王子龙刘进宝新疆农垦科学院机械装备研究所新疆石河子832000

整地作业可将犁耕后的土壤进行碎土、平整,为播种环节创造良好的作业条件,联合整地机在新疆已被广泛应用。近年来大中马力拖拉机保有量逐年增加,为提高整地作业幅宽和效率,研制了一款与大马力拖拉机相配套的联合作业机,开发了新型合金... 详细信息

整地作业可将犁耕后的土壤进行碎土、平整,为播种环节创造良好的作业条件,联合整地机在新疆已被广泛应用。近年来大中马力拖拉机保有量逐年增加,为提高整地作业幅宽和效率,研制了一款与大马力拖拉机相配套的联合作业机,开发了新型合金材料的耐磨耙片。作业幅宽为7.2 m,机架可以进行折叠便于运输。田间试验表明,该型机具作业效果良好,故障率低,操作简单、方便。

关键词：圆盘耙组镇压碎土联合整地智能装备

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浮针治疗咽异感症的临床观察

中医康复 2024年第8期1卷 55-59页

作者：杜丽英肖卫平王浩韩伟李子琛泰安市中医医院山东泰安271000

目的:观察浮针治疗咽异感症的临床疗效。方法:选取符合纳入标准的咽异感症患者84例(脱落3例,完成81例),随机分为浮针组(40例)和针刺组(41例)。浮针组施以浮针疗法,针刺组施以普通针刺,每次30min,均治疗2个疗程。观察两组治疗前后格拉斯... 详细信息

目的:观察浮针治疗咽异感症的临床疗效。方法:选取符合纳入标准的咽异感症患者84例(脱落3例,完成81例),随机分为浮针组(40例)和针刺组(41例)。浮针组施以浮针疗法,针刺组施以普通针刺,每次30min,均治疗2个疗程。观察两组治疗前后格拉斯哥爱丁堡咽喉症状评价量表(GETS)、汉密尔顿焦虑量表(HAMA)和汉密尔顿抑郁量表(HAMD)评分的变化并评价疗效。结果:2个疗程治疗后,两组患者GETS、HAMA和HAMD评分均明显低于治疗前,且浮针组患者各评分均明显低于针刺组(P<0.05);浮针组和针刺组总有效率分别为92.5%和85.4%,浮针组疗效明显优于针刺组(P<0.05)。结论:浮针疗法能有效缓解患者咽部异物感症状,改善焦虑抑郁情绪,临床疗效好于普通针刺治疗。

关键词：浮针咽异感症焦虑抑郁针刺

Vegetation change and its response to drought in Inner Mongolia of northern China from 1998 to 2013

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Research in Cold and Arid Regions 2019年第6期11卷 448-460页

作者： Shu Lin Liu Tao wang Wen Ping Kang zi Chen Guo Xue Qin Zhang Key Laboratory of Desert and Desertification Northwest Institute of Eco-environment and ResourcesChinese Academy of Sciences

Vegetation plays a significant role in global terrestrial ecosystems and in combating *** analyzed vegeta tion change in Inner Mongolia of northern China using the Normalized Difference Vegetation Index(NDVI)from 1998 to 2013,which is an important composite of Chinese National Ecological Security *** correlation between vegeta tion growth and drought quantified using the Standardized Precipitation Evapotranspiration Index(SPEI)was also ex *** show that vegetation in most of the study area has been rehabilitated to various degrees,especially in re gions such as most of the Horqin Sandy Land,eastern Ordos Plateau,Hetao Plain,as well as the middle-northern Da Hing gan Ling *** improvement in spring was significant in most of the study *** degradation was centrally distributed in Xilingol grassland close to the Sino-Mongolia border and abandoned croplands in Ulanqab *** change trends and seasonal differences varied among different vegetation *** biggest vegetation variation in the growing season was the belt-like distribution along those grasslands close to the precipitation isoline of 200 mm and the Sino-Mongolia border,but also variation in summer and autumn exist in obvious spatial differences be tween grasslands and *** largely influenced vegetation change of Inner Mongolia at 6-month scale or 12-month scale,except for forests of eastern Hunlun Buir Meng and deserts or gobi deserts of western Alxa ***,drought in the previous winter and early spring seasons had a lag effect on growing-season *** grassland was the most easily affected by drought in the study *** activities have made great progress in improving local vegetation under the lasting drought background.

关键词： vegetation change drought SPOT NDVI SPEI Inner Mongolia

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分子印迹传感器在兽药残留分析领域研究进展

中国畜牧兽医 2024年第1期51卷 427-433页

作者：玄艺张宇黄晓宁姜昕妤魏可欣王晓通谢晓程李臣贵山东农业大学动物科技学院泰安271000 山东省动物生物工程与疾病防治重点实验室泰安271000

动物源食品中兽药、微生物毒素、防腐剂以及食品加工过程中的药物残留可引起明显的毒性作用和过敏反应,给人类健康带来威胁。分子印迹技术主要通过诱导模板在聚合物中形成特定识别位点,具有预定性、识别性以及实用性等优点,在兽药残留... 详细信息

动物源食品中兽药、微生物毒素、防腐剂以及食品加工过程中的药物残留可引起明显的毒性作用和过敏反应,给人类健康带来威胁。分子印迹技术主要通过诱导模板在聚合物中形成特定识别位点,具有预定性、识别性以及实用性等优点,在兽药残留检测领域发挥了重要作用。使用分子印迹技术制备的聚合物受体所具有的坚固性、高亲和力、特异性和生产成本低等特性,使它们成为天然受体以及有毒化合物可选择的替代品。将分子印迹技术与传感器技术相结合,使两者的优势特点充分发挥,聚合物科学和纳米技术的进步有助于提高分子印迹聚合物传感器的性能,分子印迹传感器所适用的领域也进一步扩大。近年来许多高质量文献报道了分子印迹聚合物传感器在生物分子、滥用药物和爆炸物等领域的研究,推动了该技术在生命科学和危化品领域的应用。作者重点简述了分子印迹技术与分子印迹传感器的原理,介绍了基于分子印迹聚合物的传感器技术的最新成就以及面向兽药残留检测应用领域的研究。

关键词：分子印迹分子印迹聚合物分子印迹传感器兽药残留

改良剂与沼液配施对中度苏打盐碱土的改良效果研究

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中国土壤与肥料 2024年第1期 43-50页

作者：宋明璇周晨辉闫丙建刘金华赵小湾王雪杨靖民张忠庆吉林农业大学资源与环境学院/吉林省商品粮基地土壤资源可持续利用重点实验室/吉林省黑土地保护与利用工程实验室/秸秆综合利用与黑土地保护教育部重点实验室吉林长春130118 吉林大安牧原农牧有限公司吉林白城137000 吉林省农业技术推广总站吉林长春130118 长春师范大学吉林长春130032

为了探究改良剂与沼液配施的合理方案,实现盐碱地改良,针对吉林省大安市盐碱地,通过大田试验,研究沼液与改良剂配施对苏打盐碱土的改良效果。试验结果表明,改良剂与沼液配施均能够有效提高土壤有机质、有效磷、速效钾、碱解氮的含量,增... 详细信息

为了探究改良剂与沼液配施的合理方案,实现盐碱地改良,针对吉林省大安市盐碱地,通过大田试验,研究沼液与改良剂配施对苏打盐碱土的改良效果。试验结果表明,改良剂与沼液配施均能够有效提高土壤有机质、有效磷、速效钾、碱解氮的含量,增大总孔隙度,增加了土壤团聚体的数量,改善了土壤团聚体稳定性,水稻产量显著提升,并有效降低土壤pH值、土壤容重、碱化度、水溶性盐含量。综合分析,脱硫石膏与沼液配施对苏打盐碱土改良效果最好,对比未施用沼液的处理,有机质含量提升100%,有效磷含量提升34%,速效钾含量提升59%,碱解氮含量提升104%,总孔隙度提升14%,土壤团聚体数量显著增加,土壤团聚体稳定性得到明显改善,增产率为76.77%,土壤p H值降低12%,土壤容重降低9.9%,碱化度降低11%,水溶性盐含量降低48%。

关键词：苏打盐碱土沼液改良剂土壤理化性质

Avoiding revascularization strategy versus revascularization with drug-coated balloon for the treatment of superficial femoral artery occlusive disease

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Journal of Interventional Medicine 2021年第2期4卷 87-93页

作者： Hongcheng Ren Jinman Zhuang xuan Li Tianrun Li Jingyuan Luan Changming wang Department of Intervention Vascular Surgery Peking University Third Hospital Beijing 100191China

Objective:The aim of this study was to compare the efficacy,safety and treatment costs of superficial femoral artery revascularization(SFA)with drug-coated balloon(DCB)versus avoiding revascularization strategy for the treatment of symptomatic SFA ***:This retrospective single-center study reviewed 96 patients(113 limbs)with severe stenosis and occlusive SFA *** patients underwent either DCB(Group 1:n=55 limbs)or nonrevascularization(Group2:n=58 limbs)between March 2015 and June *** improvement of Rutherford class,walking impairment questionnaire score(WIQ),target limb reintervention,perioperative major adverse events,the catheterization laboratory cost and length of hospital stay were *** limb salvage and survival rates were calculated using the Kaplan-Meier *** and multivariate logistic regression analysis were performed to assess the association between factors and the improvement of Rutherford category at 12 ***:The median follow-up time of Groups 1 and 2 was 17 and 33 months,*** 12 months,the Rutherford category significantly decreased in both groups(P<0.001),with no significant difference(79.7%vs.64.3%,P=0.074).Furthermore,multivariate analysis showed that the selected therapeutic method was not an influential factor for the improvement of Rutherford class at 12 *** WIQ overall score as well as three subscales scores(distance,speed and stair-climbing),the survival rate,limb salvage rate and the length of stay between the two groups were *** perioperative adverse events rate and catheterization laboratory cost in Group 2 was significantly lower compared to Group 1[(34253.69±28172.87)yuan vs.(56936.76±41278.36)yuan,P=0.001].Conclusions:This study suggests that avoiding superficial femoral artery revascularization strategy has favorable efficacy and safety outcomes compared to combining revascularization with DCB in selected patients.

关键词： superficial balloon revascularization

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多元固废基胶凝体系固化盐渍土的力学性能

中国粉体技术 2024年第5期30卷 57-69页

作者：王紫周志尧张喆兰永军孟松松李宏波宁夏大学土木与水利工程学院宁夏银川750021 宁夏大学宁夏土木工程防震减灾工程技术研究中心宁夏银川750021 宁夏大学宁夏节水灌溉与水资源调控工程技术研究中心土木与水利工程学院宁夏银川750021 谢菲尔德大学土木与结构工程系英国南约克郡S102TN

【目的】改善宁夏地区工程盐渍土地基的冻胀和腐蚀问题。【方法】采用水泥、粉煤灰、硅灰和硅锰渣作为盐渍土的固化剂,设计四因素三水平正交试验方案,通过无侧限抗压强度试验和三轴试验,探讨不同固化剂掺量(质量分数,下同)对盐渍土抗压... 详细信息

【目的】改善宁夏地区工程盐渍土地基的冻胀和腐蚀问题。【方法】采用水泥、粉煤灰、硅灰和硅锰渣作为盐渍土的固化剂,设计四因素三水平正交试验方案,通过无侧限抗压强度试验和三轴试验,探讨不同固化剂掺量(质量分数,下同)对盐渍土抗压强度和抗剪强度的影响;采用扫描电子显微镜(scanning electronic microscopy,SEM)和X射线衍射(X‐ray diffraction,XRD)表征分析固化盐渍土的强度提升机制。【结果】水泥和硅灰提升固化盐渍土的早期强度作用较为显著,随掺量的增加,粉煤灰强度呈先增后减的趋势,硅锰渣结构较为稳定,需要充足的碱性环境来激发胶凝能力;水泥、粉煤灰、硅灰和硅锰渣4种因素对固化盐渍土抗压强度的影响程度由高到低的顺序为水泥、硅灰、粉煤灰、硅锰渣;水泥、粉煤灰、硅灰和硅锰渣掺量分别为3%、5%、5%和3%时固化效果最佳,为最佳配合比;固化盐渍土生成棒状的钙矾石(aluminate ferro-copper-calcium sulfate,AFt)和网状的水化铝酸钙(calcium aluminate hydrate,C-A-H)等水化产物相互联结,微观结构变得致密。协同作用提升了固化盐渍土的强度。【结论】采用水泥、粉煤灰、硅灰和硅锰渣最佳配合比能够使盐渍土地基固化,改善地基的冻胀和腐蚀问题。

关键词：固化盐渍土无侧限抗压强度试验三轴试验微观分析

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Effect of transcutaneous auricular vagus nerve stimulation on fasting blood glucose and serum insulin concentration in Zucker diabetes fatty rats

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World Journal of Acupuncture-Moxibustion 2021年第3期31卷 212-217页

作者： zi-xuan ZHANG Shao-yuan LI Yu wang Yue ZHANG Yi-fei wang Pei-jing RONG Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBeijing 100700China

Objective:To observe the influence of transcutaneous auricular vagus nerve stimulation(taVNS) on fasting plasma glucose(FPG) and serum insulin(INS) in Zucker diabetes fatty(ZDF) rats and explore the regulatory effect of taVNS on blood glucose in ZDF ***:A total of 20 male ZDF rats were randomized into a model group and a taVNS group,10 rats in each ***,the other 10 Zucker Lean(ZL) rats were selected to be a control *** rats in the control group were fed with common forage and those in the model group and the taVNS group were fed with high-sugar and high-fat *** intervention of electric stimulation was applied in the rats of taVNS group,with 2/15 Hz in frequency,disperse-dense wave and 2 mA in *** intervention lasted 30 min,once a day,consecutively for 12 *** any intervention was given in the control group and the model *** body mass and FPG level were recorded once every 2 weeks in the *** the experiment,the rats were sacrificed and blood sample was *** linked immunosorbent assay(ELISA) was adopted to determine the level of serum INS in the ***:After the modeling,compared with the control group,the body mass and FPG level were all higher(P <0.05,P <0.01) and the concentration of serum INS was lower(P <0.01) in the rats of the model *** intervention,compared with the model group,the body mass was lower in week 6 to 10(P <0.01,P <0.05),FPG level was lower in week 8 to 12(P <0.01,P <0.05) and serum INS concentration was higher(P <0.01) in the rats of the taVNS ***:TaVNS apparently improves in hyperglycemia in ZDF rats and increases serum insulin concentration in the rats.

关键词： Transcutaneous auricular vagus nerve stimulation Type 2 diabetes mellitus Zucker diabetic fatty rat Insulin Hypoglycemic