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Another Simple and Elementary Proof of the Classical Isoperimetric Inequality

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Chinese Quarterly Journal of Mathematics 2005年第2期20卷 128-130页

作者： PANSheng-liang yaNGJuan-ha DepartmentofMathematics EastChinaNormalUniversityShanghai215006China

In this short note we will give another simple and elementary proof of the classical isoperimetric inequality in the Euclidean plane.

关键词： convex plane polygons classical isoperimetric inequality

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聚丙烯微塑料对超滤膜过滤腐殖酸的影响

环境科学学报 2024年第5期44卷 120-127页

作者：宋亚丽赵健淇俞娅朱文芳郑磊赵青青汪华浙江科技学院土木与建筑工程学院杭州310023 浙江科技学院浙江省废弃生物质循环利用与生态处理技术重点实验室杭州310023

随着水环境中微塑料(MPs)的不断检出,以地表水为水源的饮用水处理技术面临新的挑战.当前,超滤(UF)作为净水厂常规处理的替代工艺获得了广泛应用,MPs的存在势必对超滤过程产生影响,而相关研究则鲜有报道.为深入了解MPs对超滤膜过滤天然... 详细信息

随着水环境中微塑料(MPs)的不断检出,以地表水为水源的饮用水处理技术面临新的挑战.当前,超滤(UF)作为净水厂常规处理的替代工艺获得了广泛应用,MPs的存在势必对超滤过程产生影响,而相关研究则鲜有报道.为深入了解MPs对超滤膜过滤天然有机物的影响,开展了老化前后聚丙烯(PP)MPs对超滤膜过滤腐殖酸(ha)过程的影响研究.结果表明,MPs的存在可提高ha的去除率,且老化MPs可进一步促进ha的去除.MPs可导致超滤膜膜比通量下降,但下降的幅度较小,且老化过程对膜比通量的影响更小.pH值对MPs存在下的膜比通量的影响较无MPs工况小,与na^(+)相比,Ca^(2+)可导致超滤膜过滤MPs+ha过程的膜比通量下降更多,而MPs对超滤膜过滤ha不同亲疏水组分的膜比通量无明显影响.MPs可导致超滤膜过滤ha的膜污染阻力增加,但其值较单独过滤MPs和ha产生的膜污染阻力之和小很多,MPs与ha在膜表面共存时,MPs可吸附ha并与其在超滤膜表面形成架桥作用,使滤饼层结构松散,进而使膜污染阻力增加不多.

关键词：微塑料(MPs) 聚丙烯(PP) 腐殖酸(ha) 老化超滤膜污染

Neuroprotective effects of ischemic preconditioning on hippocampal CA1 pyramidal neurons through maintaining calbindin D28k immunoreactivity following subsequent transient cerebral ischemia

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Neural Regeneration Research 2017年第6期12卷 918-924页

作者： In Hye Kim Yong Hwan Jeon Tae-Kyeong Lee Jeong Hwi Cho Jae-Chul Lee Joon ha Park Ji Hyeon Ahn Bich-na Shin yang Hee Kim Seongkweon Hong Bing Chun yan Moo-Ho Won Yun Lyul Lee Department of Neurobiology School of Medicine Kangwon National University Department of Radiology School of Medicine Kangwon National University Department of Biomedical Science Research Institute of Bioscience and Biotechnology Hallym University Department of Physiology College of Medicine Hallym University Department of Surgery School of Medicine Kangwon National University Institute of Integrative Traditional & Western Medicine Medical College Yangzhou University

Ischemic preconditioning elicited by a non-fatal brief occlusion of blood flow has been applied for an experimental therapeutic strategy against a subsequent fatal ischemic insult. In this study, we investigated the neuroprotective effects of ischemic preconditioning（2-minute transient cerebral ischemia） on calbindin D28k immunoreactivity in the gerbil hippocampal CA1 area following a subsequent fatal transient ischemic insult（5-minute transient cerebral ischemia）. A large number of pyramidal neurons in the hippocampal CA1 area died 4 days after 5-minute transient cerebral ischemia. Ischemic preconditioning reduced the death of pyramidal neurons in the hippocampal CA1 area. Calbindin D28k immunoreactivity was greatly attenuated at 2 days after 5-minute transient cerebral ischemia and it was hardly detected at 5 days post-ischemia. Ischemic preconditioning maintained calbindin D28 k immunoreactivity after transient cerebral ischemia. These findings suggest that ischemic preconditioning can attenuate transient cerebral ischemia-caused damage to the pyramidal neurons in the hippocampal CA1 area through maintaining calbindin D28k immunoreactivity.

关键词： hippocampal subsequent minute pyramidal maintaining attenuated hippocampus neuronal occlusion fatal

旱作丘陵区不同酿造高粱种质资源产量相关性状分析

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寒旱农业科学 2024年第9期3卷 828-833页

作者：彭之东范娜白文斌山西农业大学(山西省农业科学院)高粱研究所山西晋中0030600 高粱遗传与种质创新山西省重点实验室山西晋中030600

通过筛选适宜在山西省旱作丘陵区种植的酿造高粱品种,以集成丘陵旱作区高粱优质高效栽培技术。选取了12个高粱品种进行不同性状的相关性分析、主成分分析。结果表明,折合产量最高的是晋粱211,为10 560.85 kg/hm^(2),较对照品种高杂4增产... 详细信息

通过筛选适宜在山西省旱作丘陵区种植的酿造高粱品种,以集成丘陵旱作区高粱优质高效栽培技术。选取了12个高粱品种进行不同性状的相关性分析、主成分分析。结果表明,折合产量最高的是晋粱211,为10 560.85 kg/hm^(2),较对照品种高杂4增产8.35%;其次是晋杂44号,为10 502.12 kg/hm^(2),较对照品种高杂4增产7.74%;吉杂225排第3,为10 500.15 kg/hm^(2),较对照品种高杂4增产7.72%。晋杂44蛋白质含量最高(126.6 g/kg),高杂4脂肪含量(56.4 g/kg)和淀粉含量最高(773.8 g/kg)。相关性分析表明,主要农艺性状对产量的直接效应从大到小依次为出籽率、穗数、生育期、穗长、株高。通过主成分分析,将7个产量相关指标划分成3个主成分因子,第1主成分与鲜穗重、产量、穗数有关;第2主成分与穗粒数、出籽率、水分含量有关;第3主成分与千粒重有关。综合分析可知,晋杂51号、禾粱1号、晋杂44号、吉杂225、晋粱211和高杂4号适宜在山西省旱作丘陵区推广种植。

关键词：旱作丘陵区高粱品种产量相关性分析

维普期刊数据库博看期刊

Effect of hyperthermia on calbindin-D 28k immunoreactivity in the hippocampal formation following transient global cerebral ischemia in gerbils

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Neural Regeneration Research 2017年第9期12卷 1458-1464页

作者： Jae-Chul Lee Jeong-Hwi Cho Tae-Kyeong Lee In Hye Kim Moo-Ho Won Geum-Sil Cho Bich-na Shin In Koo Hwang Joon ha Park Ji Hyeon Ahn Il Jun Kang Young Joo Lee yang Hee Kim Department of Neurobiology School of Medicine Kangwon National University Department of Pharmacology & Toxicology Shinpoong Pharmaceutical Co. Ltd. Department of Physiology College of Medicine Hallym University Department of Anatomy and Cell Biology College of Veterinary Medicine and Research Institute for Veterinary Science Seoul National University Department of Biomedical Science Research Institute of Bioscience and Biotechnology Hallym University Department of Food Science and Nutrition Hallym University Department of Emergency Medicine Seoul Hospital College of Medicine Sooncheonhyang University Department of Surgery School of Medicine Kangwon National University

Calbindin D-28K （CB）, a Ca2＋-binding protein, maintains Ca2＋ homeostasis and protects neurons against various insults. Hyperthermia can exacerbate brain damage produced by ischemic insults. However, little is reported about the role of CB in the brain under hyperthermic condition during ischemic insults. We inves- tigated the effects of transient global cerebral ischemia on CB immunoreactivity as well as neuronal damage in the hippocampal formation under hyperthermic condition using immunohistochemistry for neuronal nuclei （NeuN） and CB, and Fluoro-Jade B histofluorescence staining in gerbils. Hyperthermia （39.5 ＋ 0.2~C） was induced for 30 minutes before and during transient ischemia. Hyperthermic ischemia resulted in neu- ronal damage/death in the pyramidal layer of CA1-3 area and in the polymorphic layer of the dentate gyrus at 1, 2, 5 days after ischemia. In addition, hyperthermic ischemia significantly decreaced CB immunoreac- tivity in damaged or dying neurons at 1, 2, 5 days after ischemia. In brief, hyperthermic condition produced more extensive and severer neuronal damage/death, and reduced CB immunoreactivity in the hippocampus following transient global cerebral ischemia. Present findings indicate that the degree of reduced CB immu- noreactivity might be related with various neuronal damage/death overtime and corresponding areas after ischemic insults.

关键词： nerve regeneration hyperthermic condition ischemia/reperfusion injury subregions of hippocampus delayed neuronal death calbindin D-28k neural regeneration

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动物氧化和免疫应激模型的建立方法

中国畜牧杂志 2018年第9期54卷 20-25页

作者：赵亚波萨茹丽那.巴根那哈斯额尔敦曹琪娜敖长金内蒙古农业大学动物科学学院内蒙古呼和浩特010018 内蒙古自治区家畜改良工作站内蒙古呼和浩特010011

随着我国畜牧业由以往的散养模式逐渐转变为大规模集约化养殖模式,各种应激已经成为影响家畜正常生长和生产的重要因素。研究动物抗应激机理首先需要建立动物应激模型。本文重点阐述了国内外建立动物氧化和免疫应激模型的新近研究概况,... 详细信息

随着我国畜牧业由以往的散养模式逐渐转变为大规模集约化养殖模式,各种应激已经成为影响家畜正常生长和生产的重要因素。研究动物抗应激机理首先需要建立动物应激模型。本文重点阐述了国内外建立动物氧化和免疫应激模型的新近研究概况,旨在为我国动物应激模型的建立和相关研究提供依据与参考。

关键词：氧化应激免疫应激模型

Correlation Between Hyaluronic Acid,Hyaluronic Acid Synthase And Human Renal Clear Cell Carcinoma

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Chinese Journal of Cancer Research 2011年第1期23卷 59-63页

作者： Jian-liang Cai Ming Li yan-qun na Peking University Wu Jieping Urological Center Peking University Shougang HospitalBeijing 100144China Key laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of UrologyPeking University School of OncologyBeijing Cancer Hospital ＆ InstituteBeijing 100142China

Objective：To study the correlation between hyaluronic acid（ha）,hyaluronic acid synthase（haS） and human renal clear cell carcinoma（RCCC）.Methods：The expression of three haS isoforms＇ gene and ha in 93 RCCC tissues,27 nephridial tissues by the side of RCCC from two hospitals were measured with Real-Time RT-PCR、Western Blot and immunohistochemical methods and ***：All RCCC and adjacent normal tissues expressed three haSs＇ mRna protein;at the mRna level,both RCCC and adjacent normal tissues,expressed more haS3 than haS1 or haS2,their differences were statistically significant（all P values 0.05）;but,at the protein level,all haS isoforms presented the equivalent *** with the adjacent non-neoplastic kidney tissues,the expression of all haS isoforms＇ mRna in RCCC tissues were increased evidently and their differences were significant（all P values 0.0001）;but at the protein level,only the expression of haS3 increased evidently（P=0.022）.In all adjacent normal tissues,more than 80% renal tubular cells strongly expressed ha,however,only the minority RCCC cases（16/93） presented weakly positive ha staining in few cancer nests（5%-30%）,the difference were significant（P0.0001）.In RCCC tissues subgrouped according to clinical stage,pathological grade,lymphatic metastasis or not and distant metastasis or not,the haSs＇ mRna protein differential expression all had no statistical significance（all P values 0.05）.Conclusion：Different from other malignancy,ha and haSs（except for haS3） may not play important roles in the biological progress of human RCCC.

关键词： Renal clear cell carcinoma Hyaluronic acid Hyaluronic acid synthase Gene

Effect of organic amendment amount on soil nematode community structure and metabolic footprints in soybean phase of a soybean-maize rotation on Mollisols

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Pedosphere 2020年第4期30卷 544-554页

作者： Fengjuan PAN Xiaozeng haN na LI Jun yaN yanli XU national Observation Station of hailun Agro-ecology System Key Laboratory of Mollisols AgroecologyNortheast Institute of Geography and AgroecologyChinese Academy of SciencesHarbin 150081(China)

It has been well documented that organic amendment affects soil nematode community ***,little is known about the effect of organic amendment amount on soil *** assess the effect of the amount of organic amendments on soil nematode community structure and metabolic activity,the community composition,abundance,and metabolic footprints of soil nematodes were determined in a long-term field experiment with various amounts of organic amendment in Northeast *** treatments included an unfertilized control(CK),chemical fertilizer without manure amendment(OM0),manure applied at 7.5 Mg ha^-1 plus chemical fertilizer(OM1),and manure applied at 22.5 Mg ha^-1 plus chemical fertilizer(OM2).A total of 46 nematode genera were *** with the largest amount of organic amendment had the smallest number of plant parasite genera(5),but a largest number of dominant genera(7).Soil nematodes,bacterivores,and fungivores were the most abundant in OM2,followed by OM1,and the lowest in OM0 and *** amendment increased the enrichment index(EI),and the large amount of organic amendment increased the metabolic footprints of bacterivore(Baf)and fungivore(Fuf)and enrichment footprint(Ef).The relationships between Baf(or Fuf)and the increases in soil organic carbon(?SOC)and total nitrogen(?TN)were stronger than those of bacterivore(or fungivore)abundance with?SOC and?TN,except for the relationship between bacterivore abundance and ?*** EI and Ef were positively correlated with ?SOC and ?*** findings suggest that the amount of organic amendment affects soil nematode activity and function at entry levels in soil food web,and that metabolic footprints of soil nematodes may be better indicators than their abundances in assessing their relationships with soil nutrients.

关键词： community composition ecosystem function enrichment footprint enrichment index metabolic activity soil food web trophic group

康莱特与高聚生改善晚期癌症患者生存质量的临床对照研究

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中国现代应用药学 2005年第Z2期22卷 764-766页

作者：哈娜哈力王瑛哈尔滨医科大学附属第一临床医院高干病房药局黑龙江哈尔滨150001

目的比较康莱特和高聚生改善晚期癌症患者生存质量的临床疗效。方法将78例晚期癌症患者随机分成2组,康莱特组40例。高聚生组38例,进行临床对照观察。结果康莱特组与高聚生组比较,疼痛缓解率、KPS评分、生活质量评分及体重评分有明显提高... 详细信息

目的比较康莱特和高聚生改善晚期癌症患者生存质量的临床疗效。方法将78例晚期癌症患者随机分成2组,康莱特组40例。高聚生组38例,进行临床对照观察。结果康莱特组与高聚生组比较,疼痛缓解率、KPS评分、生活质量评分及体重评分有明显提高,统计学处理均有显著性差异(X^2=16.72,P<0.005;X^2=9.99,P<0.01;X^2=6.63,P<0.05;X^2=7.60,P<0.05)。免疫功能测定显示,康莱特组CD_4/CD_8比值明显升高,与治疗前比较有显著性差异;高聚生组CD_3、CD_4、CD_4/CD_8值均明显升高,与治疗前比较有显著性差异。两组药物均无严重毒副作用。结论综合上述各项指标,康莱特改善晚期癌症患者生存质量的临床疗效优于高聚生。

关键词：康莱特高聚生晚期癌症生存质量