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种植密度对胡麻抗倒性和产量的影响

中国农学通报 2024年第8期40卷 1-5页

作者：杨治伟钱爱萍张炜曹秀霞宁夏农林科学院固原分院宁夏固原756000

为了探索种植密度对胡麻抗倒性和产量的影响,以宁南山区水浇地大面积种植的胡麻品种‘宁亚21号’为材料,通过设置30×10^(5)、45×10^(5)、60×10^(5)、75×10^(5)株/hm^(2)共4个种植密度,研究了不同种植密度下胡麻抗倒性和产量构成的... 详细信息

为了探索种植密度对胡麻抗倒性和产量的影响,以宁南山区水浇地大面积种植的胡麻品种‘宁亚21号’为材料,通过设置30×10^(5)、45×10^(5)、60×10^(5)、75×10^(5)株/hm^(2)共4个种植密度,研究了不同种植密度下胡麻抗倒性和产量构成的变化。结果表明,随着种植密度的升高,茎秆抗折力、茎粗、茎壁厚度和木质素含量、有效结果数和单株产量逐渐降低,产量先升高后降低。相关性分析表明,茎秆抗折力与茎粗、茎壁厚度、冠重呈极显著正相关,木质素含量和倒伏率呈显著负相关。综合考虑增产增效,抗倒伏效果好、产量相对稳定,推荐宁南山区水浇地‘宁亚21号’的种植密度为45×10^(5)株/hm^(2)。

关键词：胡麻密度产量抗倒性

Ericoid mycorrhizal fungus enhances microcutting rooting of Rhododendron fortunei and subsequent growth

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Horticulture Research 2020年第1期7卷 931-941页

作者： Xiangying wei Jianjun Chen Chunying Zhang Hong Liu xiuxia Zheng Jingli Mu Institute of Oceanography Minjiang University350108 FuzhouFujian ProvinceChina Department of Environmental Horticulture and Mid-Florida Research and Education Center University of FloridaIFASApopkaFL 32703USA Shanghai Engineering Research Center of Sustainable Plant Innovation Shanghai Botanical Garden200231 ShanghaiChina State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry University350002 FuzhouFujian ProvinceChina

Adventitious root(AR)formation is a unique feature of plant reproduction and plays a vital role in crop production as many horticultural and forestry plants are propagated through cuttings.A growing number of reports have shown that microbes,particularly mycorrhizal fungi are able to promote AR formation,but the underlying mechanisms remain largely *** study established an in vitro culture system and investigated AR formation in microcuttings of Rhododendron fortunei *** with Oidiodendron maius Barron Om19,an ericoid mycorrhizal fungus *** and precursors involved in the biosynthesis of indole-3-acetic acid(IAA)in Om19 mycelium were ***19 was able to produce a large quantity of tryptophan(Trp)and also indole-3-pyruvate(IPA)and IAA,indicating that IAA biosynthesis in Om19 could be through a Trp-dependent *** inoculation of Om19,ARs were quickly formed in *** related genes were activated in ARs,and Om19 effectively colonized the ***3,a key gene in plant biosynthesis of IAA and genes involved in nitrogen(N)uptake and metabolism,phosphorus(P)uptake were highly *** absorbed significantly greater quantity of mineral nutrients,and their growth was substantially enhanced compared to the control plants without Om19 inoculation.A working model for Om19 enhanced AR formation was *** rapid formation of ARs in cuttings could be due in part to the induction of IAA biosynthesized by Om19 and also attributed to Trp catalyzed biosynthesis of IAA in *** formation,in turn,provided Om19 preferred sites for *** study suggested that in addition to promoting AR formation,Om19 could potentially be used as a new biofertilizer for enhancing production of ericaceous plants,such as blueberry,cranberry,and rhododendron.

关键词： metabolism culture attributed

Recent developments and progress of inorganic photo-stimulated phosphors

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Journal of Rare Earths 2019年第7期37卷 679-690页

作者： Xiaotong Fan Zhichao Liu xiuxia Yang Wenbo Chen wei Zeng Shuyu Tian Xue Yu Jianbei Qiu Xuhui Xu College of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Engineering Research Center of New Energy Storage Devices and Applications Chongqing University of Arts and SciencesChongqing 401260China College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China

Photo-stimulated luminescence(PSL) is the process in which trapped charges are released by photons and produce luminescence through recombination. The variegated optical characteristics of photostimulated phosphors(PSPs) have drawn increasing attention and a large body of work encompassing mechanism and application of PSPs has been addressed. The optical data storage capacity resulting from abundant defect states enables PSPs to be applied to information storage. Moreover, PSPs provide potential application for anti-counterfeiting, as color changes due to the tunneling process. Recently, near infrared(NIR) light PSPs have been developed, exhibiting enormous potential for in vivo bio-imaging, as the stable and high noise-signal ratio characteristic of PSL. In this review, we devote to introducing the development and process of PSPs, and the challenge and future advance have also been demonstrated.

关键词： Photo-stimulated phosphors Traps Optical data storage Anti-counterfeiting Bio-imaging Rare earths

虫草素通过抑制RIP1/RIP3/MLKL信号通路减轻溃疡性结肠炎大鼠结肠组织坏死性凋亡的机制研究

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中国中西医结合消化杂志 2024年第6期32卷 511-517页

作者：池文婕魏岚张秀霞靳改玲王佳敏王利民河北北方学院附属第二医院消化内科河北张家口075100

目的:探讨虫草素通过抑制受体相互作用蛋白(receptor interacting protein,RIP)1/RIP3/混合谱系激酶结构域样蛋白(mixed lineage kinase domain like protein,MLKL)信号通路减轻溃疡性结肠炎(ulcerative colitis,UC)大鼠结肠组织坏死性凋亡的作用机制。方法:采用三硝基苯磺酸(TNBS)和乙醇联合灌肠法制造UC模型大鼠,成功造模后将56只大鼠随机分为模型组、虫草素低剂量组(40 mg/kg)、虫草素高剂量组(80 mg/kg)、Nec-1组(RIP1抑制剂,0.6 mg/kg),每组14只;另取14只大鼠作为对照组。大鼠给予相应药物干预,1次/d,连续2周。给药结束24 h后,记录大鼠一般行为状态并进行疾病活动指数(disease activity index,DAI)评分;苏木精-伊红染色观察大鼠结肠组织病理学变化;ELISA法检测大鼠血清IL-1β、IL-6、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)水平;TUNEL检测大鼠结肠组织细胞凋亡率;免疫组化法检测大鼠结肠组织髓过氧化物酶(myeloperoxidase,MPO)、E-钙黏蛋白(epithelial cadherin,E-cadherin)、增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)阳性表达;蛋白印迹法检测大鼠结肠组织半胱氨酸蛋白酶-8(Caspase-8)、RIP1、磷酸化RIP1(p-RIP1)、RIP3、磷酸化RIP3(p-RIP3)、MLKL、磷酸化MLKL(p-MLKL)蛋白的表达。结果:对照组大鼠大便正常,结肠黏膜结构完整,未见溃疡和糜烂,固有层腺体排列紧密,层次清晰,上皮细胞排列规则未见坏死变性;与对照组比较,模型组大鼠体重下降,出现稀便、血便,结肠黏膜结构破坏明显,固有层腺体排列紊乱,间隙变宽,上皮细胞明显减少,炎性细胞浸润明显,DAI评分、血清IL-1β、IL-6、TNF-α、结肠组织细胞凋亡率、MPO、PCNA阳性表达、p-RIP1/RIP1、p-RIP3/RIP3、p-MLKL/MLKL蛋白比值均显著升高(均P0.05)。结论:虫草素能够通过抑制RIP1/RIP3/MLKL信号通路减轻UC大鼠结肠炎症,减少结肠组织细胞坏死性凋亡。

关键词：虫草素受体相互作用蛋白混合谱系激酶结构域样蛋白溃疡性结肠炎凋亡

Preparation Nano-Diamond Film by Sol-Gelled Coating Method for Field Emission Display

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Advances in Nanoparticles 2017年第1期6卷 1-9页

作者： xiuxia Zhang Shuyi wei Qianyu Ji School of Electrical and Information Engineering Beifang University of Nationalities Yinchuan China Optoelectronic Information Engineering Hefei University of Technology Hefei China

The mixture of Nano-graphite and organic vehicles doped to Nano-diamond paste. The suitable paste proportion was found. Nano-diamond film (NDF) was prepared by sol-gel coating method on ITO glass at 3000/min. The field emission characteristics of luminance-current, luminance-voltage and luminance-power of Nano-diamond film were analyzed and tested. Comparing these tested curves, the luminance was well proportional to current was got. Theoretic, the inner resistance of NDF field emission display (FED) consumes electric energy and real voltage change between the cathode and the anode of NDF-FED was very small after electrons emit. So the characteristic of NDF-FED was preferable to describe by luminance-current linear relationship, which was advantageous to device tested and designed.

关键词： Nano-Diamond Film (NDF) Sol-Gel Coating Method Suitable Paste Proportion Field Emission Display (FED)

2016-2017年北京市丰台区手足口病流行病学和病原学特征分析

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预防医学情报杂志 2019年第7期35卷 751-755页

作者：尉秀霞王兆娥余红封会茹秦萌石婧武晶冯宝玉董晓根杨霄星北京市丰台区疾病预防控制中心

目的了解北京市丰台区手足口病的流行现况,为手足口病防治提供依据。方法对2016-2017年北京市丰台区手足口病病例资料进行描述性流行病学分析;对采集的病例标本进行肠道病毒检测并进行病原学特征分析。结果2016-2017年北京市丰台区累计... 详细信息

目的了解北京市丰台区手足口病的流行现况,为手足口病防治提供依据。方法对2016-2017年北京市丰台区手足口病病例资料进行描述性流行病学分析;对采集的病例标本进行肠道病毒检测并进行病原学特征分析。结果2016-2017年北京市丰台区累计报告病例5 171例,年均发病率为111.21/10万。手足口病高发于6岁以下儿童,占病例总数的86.04%,发病患者男女性别比为1.53∶1。散居儿童和幼托儿童是发病的主要人群,共占病例总数的88.84%。2016年和2017年均有两个发病高峰,2016年为6-7月,10-11月;2017年为7-8月,10-11月。地区间发病水平差异明显,卢沟桥街道病例总数(763例,190.65/10万)和花乡年均发病率(700例,222.14/10万)高于全区其他地区。实验室阳性病例611例,EV71占21.60%,Cox A16占26.84%,Cox A 6占27.17%,其他肠道病毒24.39%。结论北京市丰台区手足口病流行有明显的人群分布和地区分布差异,呈多病原共流行态势,应加强手足口病病原学监测工作。

关键词：手足口病流行病学肠道病毒病原学

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单增李斯特菌感染一例患者的病因溯源

疾病监测 2020年第1期35卷 81-85页

作者：封会茹石婧陈倩尉秀霞余红颜涛王兆娥秦萌张志敏董晓根北京市丰台区疾病预防控制中心北京100071 北京市疾病预防控制中心北京100013

目的对一例单增李斯特菌感染患者的致病因素进行调查和溯源分析。方法在现场流行病学调查的基础上,对患者、患者家庭食品、厨房用具等进行样本采集并进行单增李斯特菌的菌株分离鉴定。对分离菌株的6个毒力基因(prfA、plcB、hly、actA、... 详细信息

目的对一例单增李斯特菌感染患者的致病因素进行调查和溯源分析。方法在现场流行病学调查的基础上,对患者、患者家庭食品、厨房用具等进行样本采集并进行单增李斯特菌的菌株分离鉴定。对分离菌株的6个毒力基因(prfA、plcB、hly、actA、iap、inlA)进行检测,使用脉冲场凝胶电泳(PFGE)和多位点序列分型(MLST)技术进行分子分型分析,对分离菌株进行同源性分析。结果19份样本中共分离出6株单增李斯特菌,1株来自患者,2株来自厨房环境用具样本(冰箱冷藏室内壁涂抹1份和小号菜板涂抹1份),3株来自患者家庭中食物(分别是猪肝1份、甜玉米粒罐头1份和红焖牛肉罐头1份)。除冰箱冷藏室内壁涂抹和甜玉米粒罐头2个样本检出的菌株plcB毒力基因阴性外,另外5个毒力及其他菌株的所有毒力基因全部为阳性。分离菌株均为ST121型,PFGE带型100%一致。结论患者家庭厨房食用食物和环境皆被单增李斯特菌污染,引起交叉感染,致使患者感染发病。

关键词：单增李斯特菌毒力基因脉冲场凝胶电泳多位点序列分型同源性分析

2019-2021年北京市丰台区手足口病及疱疹性咽峡炎病原学监测结果分析

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寄生虫病与感染性疾病 2023年第2期21卷 95-99,103页

作者：曹佳琪邢洪光张志敏秦萌余红封会茹尉秀霞王兆娥颜涛张玲张建军北京市丰台区疾病预防控制中心北京100071

目的探讨北京市丰台区手足口病和疱疹性咽峡炎病例中肠道病毒的感染情况,对其流行病学及病原学特征进行分析,为疾病的预防控制及临床治疗提供科学依据及相关指导。方法收集2019-2021年北京市丰台区哨点医院常规监测及聚集疫情相关的... 详细信息

目的探讨北京市丰台区手足口病和疱疹性咽峡炎病例中肠道病毒的感染情况,对其流行病学及病原学特征进行分析,为疾病的预防控制及临床治疗提供科学依据及相关指导。方法收集2019-2021年北京市丰台区哨点医院常规监测及聚集疫情相关的手足口病及疱疹性咽峡炎病例样本,采用实时荧光PCR方法进行肠道病毒检测,使用SPSS 22.0软件进行统计分析,以P<0.05为差异有统计学意义。结果共收集病例样本1 206份,其中手足口病样本814份,检出肠道病毒阳性563件,阳性率为69.16%,其中优势毒株为Cox A6(51.33%);疱疹性咽峡炎样本392份,阳性样本228件,阳性率为58.16%。手足口病和疱疹性咽峡炎的发病高峰期主要为夏秋季;发病年龄均以1~5岁儿童为主,占比分别为77.15%和81.38%;男性发病均高于女性,比例分别为1.46∶1和1.02∶1。结论近年来手足口病及疱疹性咽峡炎的流行血清型发生改变,以Cox A6为主;夏秋季应加强对托幼儿童手足口病及疱疹性咽峡炎的监测及防控;进一步加强对手足口病及疱疹性咽峡炎的关联性研究。

关键词：肠道病毒手足口病疱疹性咽峡炎病原学监测

Effect of various Nano-SiC films on the photoelectric conversion efficiency of solar cells

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Effect of various Nano-SiC films on the photoelectric conver...