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钙镁磷肥-碳酸钾-石灰配施对稻米镉积累的影响

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土壤通报 2024年第3期55卷 819-829页

作者：马桥陈镔赵颖玥曾清如邓潇湖南农业大学环境与生态学院湖南长沙410128

【目的】施用石灰能通过调节pH以降低酸性土壤中Cd的生物有效性,但用量不适也会对土壤和水稻生产造成负面影响。钙镁磷肥富含硅(Si)、钙(Ca)、镁(Mg)、磷(P)等元素,它们与水稻Cd吸收累积的关系尚不清楚。因此,本研究旨在探讨复配施用钙... 详细信息

【目的】施用石灰能通过调节pH以降低酸性土壤中Cd的生物有效性,但用量不适也会对土壤和水稻生产造成负面影响。钙镁磷肥富含硅(Si)、钙(Ca)、镁(Mg)、磷(P)等元素,它们与水稻Cd吸收累积的关系尚不清楚。因此,本研究旨在探讨复配施用钙镁磷肥、碳酸钾和石灰对水稻稻米Cd积累的影响,并探究Si、Ca、Mg、P等元素与水稻Cd吸收之间的相互关系。【方法】本小区试验设置1个对照与4个施石灰处理。对照(CK)以复合肥为基肥、尿素+氯化钾为追肥;同时以钙镁磷肥+尿素+碳酸钾为基肥、尿素+碳酸钾为追肥作为基本条件设置4个石灰施用水平处理(0、300、450、600 kg hm^(-2))。【结果】结果发现,与CK相比,所有施用钙镁磷肥和碳酸钾的处理糙米Cd含量均显著降低,其中施加600 kg ha-1石灰的处理效果最好,糙米Cd含量从0.50 mg kg^(-1)降至0.18 mg kg^(-1),达到国家食品安全标准;土壤pH值显著上升了0.57个单位,CaCl2提取态Cd降低41.77%,生物可利用态Si、Ca、Mg含量均显著上升。相关性分析表明,水稻根和茎叶中Si、Ca、Mg的含量大部分与水稻糙米中Cd含量呈显著负相关关系(PSi>Mg>Ca。【结论】钙镁磷肥配施石灰在提高土壤pH值、降低有效Cd含量的同时提高了Si、Ca、Mg的生物有效性,抑制了水稻对Cd的吸收和累积,从而能显著降低稻米Cd污染风险。

关键词：水稻镉大田试验石灰减量钙镁磷肥

大豆玉米带状复合种植对宁夏灌区玉米物质生产与分配的影响

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农学学报 2024年第9期14卷 1-5页

作者：李振明向峰金鑫金龙哈东兴朱志明马晓民赵如浪王永宏宁夏农林科学院农作物研究所银川750105 宁夏大学银川750021 辽宁省锦州市农业科学院辽宁锦州121017 同心县农业技术推广服务中心宁夏同心751399 青铜峡市农业技术推广服务中心宁夏青铜峡751600 宁夏农业技术推广总站宁夏银川750001

本研究探讨了位于宁夏灌区的大豆玉米带状复合种植模式对玉米物质生产与分配的影响。试验涉及4种在当地示范种植的带状复合种植模式:大豆玉米S3:M2、S4:M2、S3:M4、S4:M4,对照为单作玉米(M)。玉米供试品种为‘先玉1225’,大豆供试品种... 详细信息

本研究探讨了位于宁夏灌区的大豆玉米带状复合种植模式对玉米物质生产与分配的影响。试验涉及4种在当地示范种植的带状复合种植模式:大豆玉米S3:M2、S4:M2、S3:M4、S4:M4,对照为单作玉米(M)。玉米供试品种为‘先玉1225’,大豆供试品种为‘中黄30’,玉米种植密度8.25万株/hm2,大豆种植密度15万株/hm2。结果显示,相较于单作玉米,带状复合种植模式下,玉米成熟期单株干物质减少了7.9%~30.4%,S3:M4影响最小,S4:M2影响最大;成熟期干物质总量减少了4.3%~42.7%。成熟期雌穗干物质分配减少0.5%~40.5%,S3:M4影响最小,S4:M2影响最大。玉米产量减产25.1%~41.4%,收获有效穗数减少4.2%~14.9%,千粒重减少0.5%~3.6%,单穗粒数减少5.2%~10.8%。综上所述,大豆玉米带状复合种植模式相较于单种玉米,雌穗的干物质减少,在吐丝期雌穗干物质积累开始减少,产量降低。这些发现对于优化大豆玉米带状复合种植模式在农业生产上的应用具有重要的实践意义。

关键词：大豆玉米带状复合种植物质生产物质分配

Detection of D2-40 monoclonal antibody-labeled lymphatic vessel invasion in esophageal squamous cell carcinoma and its clinicopathologic significance

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Cancer Biology & Medicine 2013年第2期10卷 81-85页

作者： Bing Bai Wei ma Kai Wang Sita.ha.Jian-Bo Wang Bing-Xu Tan Na-Na Wang Sheng-Si Yang Yi-Bin Jia Yu-Feng Cheng Department of Radiation Oncology Qilu Hospital of Shandong University Department of Oncology Yiyuan Chi- nese Medicine Hospital Department of Oncology Wendeng Central Hospital Department of Cell Pathology Graduate School of Medical Sciences Kumamoto University

Objective： This study aims to investigate the clinicopathologic significance of lymphatic vessel invasion （LVI） labeled by D2-40 monoclonal antibody in esophageal squamous cell carcinoma （ESCC）. Methods： Immunohistochemical assay was used to detect the expression of D2-40 and LVI in 107 ESCC patients. Then, the correlation between the clinicopathologic feature and the overall survival time of the patients was analyzed. Results： The lymph node metastasis rates were 70% and 21% in the LVI-positive and LVI-negative groups, respectively. The nodal metastasis rate was higher in the LVI-positive group than in the LVI-negative group. Multivariate regression analysis showed that LVI was related to nodal metastasis （P〈0.001）. The median survival time of the patients was 26 and 43 months in the LVI-positive and LVI-negative groups, respectively. Mthough univariate regression analysis showed significant difference between the two groups （P=0.014）, multivariate regression analysis revealed that LVI was not an independent prognostic factor for overall survival in the ESCC patients （P=0.062）. Lymphatic node metastasis （P=0.031）, clinical stage （P=0.019）, and residual tumor （P=0.026） were the independent prognostic factors. Conclusion： LVI labeled by D2-40 monoclonal antibody is a risk factor predictive of lymph node metastasis in ESCC patients.

关键词： Esophageal squamous cell carcinoma lymphatic vessel invasion D2-40 lymph node metastasis prognosis

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祁连山青海云杉林叶面积指数的空间异质性

山地学报 2024年第3期42卷 312-319页

作者：赵维俊牛赟杜军马雪娥张克海甘肃省祁连山水源涵养林研究院甘肃祁连山森林生态系统国家定位观测研究站淮阴师范学院地理科学与规划学院中国科学院西北生态环境资源研究院

叶面积指数（leaf area index,LAI）在山地森林具有高度的空间异质性。基于大样地尺度的山地森林叶面积空间异质性的研究较少，而且不涉及LAI对地形的响应研究。基于LAI的空间异质性和地形因子的相关性，确定取样尺度，可为提升区域尺度... 详细信息

叶面积指数（leaf area index,LAI）在山地森林具有高度的空间异质性。基于大样地尺度的山地森林叶面积空间异质性的研究较少，而且不涉及LAI对地形的响应研究。基于LAI的空间异质性和地形因子的相关性，确定取样尺度，可为提升区域尺度上LAI的空间遥感精度提供依据。本研究依托祁连山大野口流域10.2 ha(340 m×300 m)的青海云杉林动态监测样地，使用CID CI-110植物冠层数字图像分析仪对样地内255个20 m×20 m样方进行五点法LAI测定，分析LAI的空间异质性特征和空间分布格局及其与地形因子的相关性。研究结果表明：（1） LAI具有中等变异性，指数模型是变异函数的最佳理论模型，具有强烈的空间自相关，变程为16 m，南—北方向上是LAI分布的优势格局。（2） LAI的空间分布格局相对简单，具有一定的斑块性，LAI为0.56～1.43的斑块所占面积最大。（3） LAI与海拔和坡度均呈极显著负相关（P 0.05）。（4）青海云杉林的LAI空间异质性与尺度和方向有关，部分地形因子对LAI存在着显著影响。研究结果可为青海云杉林生态过程分析以及遥感技术反演LAI参数提供依据。

关键词：青海云杉林动态监测样地叶面积指数空间异质性

How we can improve patients’comfort after Milligan- Morgan open haemorrhoidectomy

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World Journal of Gastroenterology 2011年第11期17卷 1448-1456页

作者： ma-Mu-Ti-Jiang A ba-bai-ke-re Hong-Guo Huang Wen-Ni Re Kai Fan Hui Chu Er-ha-Ti Ai mai-mai-Ti-Tu-Er-Xun KE Li-Mu Yi-Rui Wang hao Wen Department of Anorectal Surgical First Affiliated Hospital of Xinjiang Medical University Urumqi 830011 Xinjiang Uygur Autonomous Region China Department of Otolaryngeological Urumqi General Hospital Lanzhou Military Command Urumqi 830011 Xinjiang Uygur Autonomous Region China Department of Pharmocological First Affiliated Hospital of Xinjiang Medi- cal University Ururnqi 830011 Xinjiang Uygur Autonomous Region China Digestive and Vascular Surgical Center First Affili. ated Hospital Xinjiang Medical University Urumqi 830011 Xinjiang Uygur Autonomous Region China

AIM:To demonstrate the value of Diosmin(flavonidic fraction)in the management of post-haemorhoidectomic ***:Eighty-six consecutive patients with grades ⅢandⅣacute mixed hemorrhoids admitted to the Anorectal Surgical Department of First Affiliated Hospital,Xinjiang Medical University from April 2009 to April 2010,were enrolled in this *** observerblinded,randomized trial was conducted to compare post-haemorhoidectomic symptoms with use of Diosmin flavonidic fraction vs ***-six patients were randomly allocated to receive Diosmin flavonidic fraction 500 mg for 1 wk(n=43)or placebo(n=43).The Milligan-Morgan open haemorrhoidectomy was performed by a standardized diathermy excision ***,bleeding,heaviness,pruritus,wound edema and mucosal discharge were observed after *** postoperative symptoms and hospitalization time were ***:The mean age of the Diosmin group and controls was 53.2 and 51.3 years,*** Diosmin group,haemorrhoid piles were of the third degree in 33 patients and the fourth degree in 10;and in the control group,29 were of the third degree and 14 were of the fourth *** was no statistically significance in age,gender distribution,degree and number of excised haemorrhoid piles,and the mean duration of haemorrhoidal disease between the two *** was a statistically significant improvement in pain,heaviness,bleeding,pruritus from baseline to the 8th week after operation(Phad a shorter hospitalization stay after surgery(P< 0.05).There was also a significant improvement on the proctoscopic appearance(P<0.001).However,there was no statistical difference between the two groups in terms of wound mucosal *** patients experienced minor bleeding at the 8th week in Diosmin group,and underwent ***:Diosmin is effective in alleviating postoperational symptoms of ***,it should be considered for the initial treatment afte

关键词： Flavonidic fraction Postoperative complication haemorrhoids

Structural Characteristics of Allomyrina Dichotoma Beetle＇s Hind Wings for Flapping Wing Micro Air Vehicle

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Journal of Bionic Engineering 2014年第2期11卷 226-235页

作者： Ngoc San ha Quang Tri Truong Hoang Vu Phan Nam Seo Goo Hoon Cheol Park Biomimetics and Intelligent Microsystem Laboratory Department of Advanced Technology Fusion Division of Interdisciplinary Studies Konkuk University Seoul 143-701 Republic of Korea

In this study, we present a complete structural analysis ofAllomyrina dichotoma beetle＇s hind wings by investigating their static and dynamic characteristics. The wing was subjected to the static loading to determine its overall flexural stiffness. Dy- namic characteristics such as natural frequency, mode shape, and damping ratio of vibration modes in the operating frequency range were determined using a Bruel ＆ Kjaer fast Fourier transform analyzer along with a laser sensor. The static and dynamic characteristics of natural Allomyrina dichotoma beetle＇s hind wings were compared to those of a fabricated artificial wing. The results indicate that natural frequencies of the natural wing were significantly correlated to the wing surface area density that was defined as the wing mass divided by the hind wing surface area. Moreover, the bending behaviors of the natural wing and artificial wing were similar to that of a cantilever beam. Furthermore, the flexural stiffness of the artificial wing was a little higher than that of the natural one whereas the natural frequency of the natural wing was close to that of the artificial wing. These results provide important information for the biomimetic design of insect-scale artificial wings, with which highly ma- neuverable and efficient micro air vehicles can be designed.

关键词： beetle hind wing flexural stiffness natural frequency mode shape Micro Air Vehicles (maVs)

Inner Co Synergizing Outer Ru Supported on Carbon Nanotubes for Efficient pH-Universal Hydrogen Evolution Catalysis

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Nano-Micro Letters 2022年第11期14卷 275-289页

作者： Jian Chen Yuan ha Ruirui Wang Yanxia Liu Hongbin Xu Bin Shang Renbing Wu Hongge Pan Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China School of Advanced materials and Nanotechnology Xidian UniversityXi’an 710126People’s Republic of China Department of materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of New Textile materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073People’s Republic of China State Key Laboratory of Silicon materials and School of materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water ***,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass *** as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 ma cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER *** current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.

关键词： Cobalt nanoparticles Carbon nanotubes Ru nanoclusters Hydrogen evolution reaction

通气策略对不同有机物料腐殖化进程和微生物群落结构的影响

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生态学杂志 2024年第9期43卷 2737-2749页

作者：牛明芬胡丹丹吴天木石莹宋俏博马建沈阳建筑大学市政与环境工程学院沈阳110168 沈阳市沈北新区乡村振兴发展中心沈阳110086 中国科学院沈阳应用生态研究所沈阳110016

基于通气量影响好氧堆肥微生物呼吸强度并影响腐殖化进程的预判,设计不同通气策略下玉米秸秆+尿素、玉米秸秆+牛粪、玉米秸秆+鸡粪等不同有机物料的堆肥腐殖化进程实验,进行反应器方式堆肥。结果表明,经40天堆肥,分阶段通气调节策略能... 详细信息

基于通气量影响好氧堆肥微生物呼吸强度并影响腐殖化进程的预判,设计不同通气策略下玉米秸秆+尿素、玉米秸秆+牛粪、玉米秸秆+鸡粪等不同有机物料的堆肥腐殖化进程实验,进行反应器方式堆肥。结果表明,经40天堆肥,分阶段通气调节策略能使尿素、鸡粪氮源有机物料组合干物质损失率分别减少12.4%和16.2%,并分别提高腐殖质聚合度至17.9%和18.1%;牛粪氮源有机物料对分阶段通气调节策略堆肥的反馈主要是胡富比的增加。对堆肥后各处理微生物群落结构的分析表明,通气量和堆肥物料共同作用于堆肥物料的微生物群落,且较易分解物质的堆体有着相似的微生物物种组成。研究发现,分阶段通气调节策略对不同有机物料腐殖化进程的影响效果不同,更适用于较易分解有机物料腐殖化进程的调控。

关键词：好氧堆肥通气调控腐殖化腐植酸微生物群落结构

女性雄性激素质谱多指标检测在多囊卵巢综合征诊断中的应用

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首都医科大学学报 2024年第4期45卷 602-608页

作者：赵越阮祥燕王月姣马郡金婧首都医科大学附属北京妇产医院/北京妇幼保健院内分泌科北京100026

目的探讨液相色谱串联质谱(liquid chromatography-tandem mass spectrometry,LC-MS/MS)法在多囊卵巢综合征(polycystic ovary syndrome,PCOS)患者中高雄激素血症(hyperandrogenemia.ha.检出率,探讨不同种类雄激素在PCOS中的诊断价值。方法纳入2023年1月至2023年12月于首都医科大学附属北京妇产医院妇科内分泌门诊就诊合并雄激素过多临床表现的PCOS患者100例为试验组,同期就诊的健康备孕人群100例为对照组。LC-MS/MS法检测总睾酮(total testosterone,TT)、游离睾酮(free testosterone,FT)、生物活性睾酮(bioavailable testosterone,BIO-T)、雄烯二酮(androstenedione,A2)、17羟孕酮、双氢睾酮、脱氢表雄酮、硫酸脱氢表雄酮、性激素结合球蛋白指标,绘制受试者工作特征曲线,计算曲线下面积(area under curve,AUC),评价各雄激素水平对PCOS的诊断效能,化学发光免疫法(chemiluminescence immunoassay,CLIA)和LC-MS/MS 2种方法比较TT检测水平的诊断价值以及对ha的检出率。结果与对照组相比,试验组TT、黄体生成素(luteinizing hormone,LH)、LH/卵泡刺激素(follicle stimulating hormone,FSH)、抗苗勒管激素、空腹胰岛素、稳态模型的胰岛素抵抗指数均明显升高(Pha检出率明显高于CLIA法(Pha的早期筛查,更适合临床推广应用。

关键词：多囊卵巢综合征高雄激素血症液相色谱串联质谱游离睾酮化学发光免疫