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Search Results: 1 - 10 of 110165 matches for " 林风武 "
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An ecological study on the benthos of the rocky intertidal zone in Quanzhou Bay.Ⅰ.Species diversity and its distribution
泉州湾岩相潮间带底栖生物生态研究Ⅰ.物种多样性与分布特征

郑成兴,李荣冠,江锦祥,,王建军,黄心光,俊辉
生物多样性 , 2004,
Abstract: A survey on four rocky intertidal transects in Quanzhou Bay was carried out from November 2001 to August 2002. A total of 6687 specimens in 216 sampling frames were collected, which yielded 324 species. These include 17 algae, 102 annelids, 96 molluscs, 62 arthropods, 11 echinoderms and 36 other animals. The results suggest that, affected by currents and waves, the number of species in horizontal distribution declines in order from Fushan (206), Xiayang (197), Dazhuidao Island (193) to Antou (166). The vertical distribution of species is affected mainly by tides and waves. A common characteristic of the transects in different intertidal areas is that the middle intertidal area has the greatest number of species (129-156 species), while the high tidal zone has the smallest number of species (9-20 species). The low tidal zone is intermediate, with 87 to 116 species. The number of species varies with change of seasons, demonstrating the adaptability of marine organisms to the temperature of water. The number of species range in a declining order from summer(190), spring(164), autumn(158) to winter(150).
肺癌患者胸腔镜下右肺上叶切除并支气管成形术1例报告及文献复习
, 程坤鹏, 张强, 马文端, 韩阳东, 戚良晨, 马乐, 王洋, 张超
吉林大学学报(医学版) , 2015, DOI: 10.13481/j.1671-587x.20150133
Abstract: 目的:探讨1例应用胸腔镜行右肺上叶切除并支气管成形术治疗右肺中心型肺癌病例临床效果,同时进行胸腔镜下肺叶切除、支气管成形术的文献复习。方法:胸腔镜下游离、处理上叶动静脉后,楔形切除部分右主支气管,纵行缝针挂线,间距3.0mm,由两侧向中心依次系紧缝线完成吻合重建通畅气道。结果:患者术后恢复顺利,术后5d拔管。病理回报为右肺上叶中分化鳞状细胞癌。术后复查胸部CT右肺中下叶膨胀良好。结论:病例选择适当,胸腔镜行右肺上叶切除、支气管成形术治疗右肺上叶开口处的右肺中心型肺癌是可行的,且效果良好。
泉州湾岩相潮间带底栖生物生态研究ⅰ.物种多样性与分布特征
郑成兴*,李荣冠,江锦祥,,王建军,黄心光,俊辉
生物多样性 , 2004,
Abstract: ?2001年11月至2002年8月在泉州湾浮山(r1)、下洋(r2)、垵头(r3)和大坠岛(r4)选择4条岩相潮间带断面对底栖生物分布进行了调查,共采集了6687号标本。经分析鉴定共有324种,其中有藻类17种,多毛类102种,软体动物96种,节肢动物62种,棘皮动物11种,其他动物共有36种。岩相断面种类的水平分布受制于潮流和海浪,不同断面的种数排序是浮山(206种)>下洋(197种)>大坠岛(193种)>垵头(166种)。垂直分布主要受制于潮汐和海浪。各断面不同潮区的共同特征是:中潮区的物种最多,在129-156种之间;低潮区居第二,在87-116种之间;高潮区的种类最少,在9-20种之间。种数的季节变化反映生物对水温的适应性,不同季节种数排序为夏季(190种)>春季(164种)>秋季(158种)>冬季(150种)。
3.0T MR动脉自旋标记技术对T1期鼻咽癌诊断价值的初步研究
刘学,余小多,李琳,赵燕,,罗德红,周纯
- , 2018, DOI: 10.13609/j.cnki.1000-0313.2018.01.005
Abstract: 【摘要】目的:初步探讨3.0T MR动脉自旋标记(ASL)技术对T1期鼻咽癌的诊断价值。方法:对13例经鼻咽镜活检病理证实的T1期鼻咽癌患者及14例健康志愿者行3D-ASL序列扫描,测量T1期鼻咽癌组肿瘤及健康对照组鼻咽黏膜的平均、最高及最低血流量(BF),比较两组的BF值差异,并采用受试者工作特征(ROC)曲线分析其诊断阈值及诊断效能。结果:T1期鼻咽癌组肿瘤的平均、最高及最低BF值均高于健康对照组鼻咽黏膜[分别为(81.62±47.66)和(28.25±10.41) mL/100g/min、(145.39±106.22)和〖JP2〗(41.10±15.51)mL/100g/min、(62.92±41.13)和(19.01±6.79)mL/100g/min],〖JP〗差异均有统计学意义(P值均<0.05)。平均、最高及最低BF值鉴别T1期鼻咽癌组肿瘤与健康对照组鼻咽黏膜的ROC曲线下面积分别为0.934、0.951及0.918。以BF最高值>63.50mL/100g/min为阈值鉴别T1期鼻咽癌组肿瘤与健康对照组鼻咽黏膜,敏感度、特异度、阳性预测值、阴性预测值及准确率分别为92.31%、92.86%,92.31%、92.86%及92.59%。结论:3.0T MR 3D-ASL技术能够反映T1期鼻咽癌与健康对照组鼻咽黏膜的血流灌注差异,有助于鼻咽癌的早期诊断
高效液相色谱法(最大吸收波长检测)同时分析饮料中九种添加剂
,张平
色谱 , 1992,
Abstract: 用高效液相色谱同时分析饮料中多种添加剂的方法,国内外已有报道。但在分析种类、时间、分离度及灵敏度等方面仍有不足。本文采用梯度洗脱,最大吸收波长检测,基线校正等分析饮料中九种添加剂,效果良好。 实验部分 (一)仪器与试剂 Waters 209型高效液相色谱仪:μBondapak C_(18)径向加压柱,10μm,100mm×8mm i.d.。680型梯度洗脱控制器。梯度为:A.甲醇,B,0.02 mol/L乙酸铵;5%A 3min,5—20%A 2 min,20—40%A 3min,40—50%A 4 min,50—5%A 4 min。流速2ml/min。用490型可编程序多波长检测器,最大吸收波长法检测。设定的六个波长为225,230,255,258,273,600nm。满量程吸收为2.0AUFS。检测器自动基线校正。740型数据处理机绘图计算。
高效液相色谱法(最大吸收波长检测)同时分析饮料中九种添加剂
,张平
色谱 , 1992,
Abstract:
崇仁麻鸡小肠pept1mrna基因差异表达
肖金华,艳平,何余湧,霍俊宏,,季华员,谢明贵,康昭,谢金防,陆伟
牲畜兽医学报 , 2014,
Abstract: ?本研究旨在揭示崇仁麻鸡肠道pept1mrna的表达规律,为进一步研究小肽在肠道的吸收机理及其肽转运载体的表达分布情况提供基础。以120日龄崇仁麻鸡小肠肠道样品为模板,使用荧光定量pcr法研究肉鸡肠道寡肽转运载体1(peptidetransporter1,pept1)mrna表达的肠段差异性以及十二指肠中高低饲料转化率组pept1mrna的表达差异性。结果表明,崇仁麻鸡小肠pept1mrna的表达丰度从十二指肠到空肠再到回肠依次降低,其中在十二指肠的表达极显著的高于回肠(p<0.01),而十二指肠与空肠以及空肠与回肠之间差异不显著(p>0.05);在十二指肠中,高饲料转化率组pept1mrna表达丰度要高于低饲料转化率组,但是差异不显著(p>0.05)。结果提示,pept1mrna主要是在崇仁麻鸡小肠的前段表达,十二指肠是pept1mrna表达的主要部位;饲料转化率高,其pept1mrna的表达丰度也高。
梨树根腐病病原菌的分离与鉴定及有效防控药剂筛选
汤小美,天元,周珊珊,李国凤,刘普,叶振,吴中营,王东升,朱立
南京农业大学学报 , 2017, DOI: 10.7685/jnau.201607002
Abstract: [目的] 为了明确黄河故道地区造成梨树根腐病的病原菌的种类,研究18种常用杀菌剂对该病原菌的抑制效果。[方法] 通过对梨树根腐病发病根系样品病原菌的分离和单孢纯化,根据代表性菌株形态学观察、rDNA-ITS序列分析和致病性试验,进行病原菌的种类鉴定,对菌丝生长和孢子萌发有效抑制的化学药剂进行筛选,并对部分药剂进行田间防效试验。[结果] 从发病根系样品中分离纯化得到4个菌株,经形态学和rDNA-ITS序列分析,鉴定为同一致病菌;结合致病性试验结果,确定该致病菌是腐皮镰刀菌(Nectria haematococca,无性态Fusarium solani)。化学药剂筛选结果表明:72%霜脲?锰锌、1.8%辛菌胺醋酸盐和80%代森锰锌对腐皮镰刀菌的菌丝生长及孢子萌发均有良好的抑制作用;虽然80%碱式硫酸铜、3%噻霉酮、75%百菌清抑制腐皮镰刀菌菌丝生长效果较差,但对其孢子萌发具有很强的抑制作用。毒力测定与田间试验结果显示:腐皮镰刀菌对4种药剂的敏感性存在差异,95%吡唑醚菌酯和80%代森锰锌对菌丝生长的毒力最强,72%霜脲?锰锌的毒力居中,1.8%辛菌胺醋酸盐的毒力最差;72%霜脲?锰锌、1.8%辛菌胺醋酸盐和80%代森锰锌田间实际防效比95%吡唑醚菌酯好。[结论] 黄河故道地区梨树根腐病由腐皮镰刀菌(Nectria haematococca,无性态Fusarium solani)引起;室内测定和田间试验结果显示,72%霜脲?锰锌、80%代森锰锌或1.8%辛菌胺醋酸盐对梨树根腐病均具有较好的防治效果。
[Objectives] This study was designed to identify the pathogen causing root rot of pear plant in the region of the Old Yellow River Valley,and screen out the efficient chemicals from 18 fungicides commonly used. [Methods] The pathogens were isolated from the tissues of root samples of diseased pear plant and purified by the single spore culture method. The pathogens were identified according to the morphological characters,rDNA-ITS analysis,and pathogenicity tests of strains. The 18 fungicides efficient for suppressing the pathogens were evaluated by calculation of the inhibition rate of mycelium growth and spore germination,and a part of the fungicides were selected for the pathogens control in field trials. [Results] Four strains were isolated and purified from the root samples and were identified as the same pathogen by morphological characteristics and rDNA-ITS analysis. Furthermore,in cooperation with the pathogenicity test,the pathogen was determined as Nectria haematococca,and its anamorph was Fusarium solani. The results of chemical screening showed that 72% cymoxanil+mancozeb,1.8% ametoctradin acetate and 80% mancozeb had good inhibition on both mycelium growth and spore germination of Fusarium solani. Although 80% copper sulfate,3% benziothiazolinone,and 75% chlorothalonil had poor inhibition on mycelium growth,they had very strong inhibition on spore germination of Fusarium solani. The virulences of the four fungicides to Fusarium solani mycelium growth tested in laboratory showed that 95% pyraclostrobin and 80% mancozeb had the best inhibition on mycelium growth of Fusarium solani,followed by 72% cymoxanil+mancozeb,and 1.8% ametoctradin acetate was the worst. After these fungicides had been applied in field,72% cymoxanil+mancozeb,1.8% ametoctradin acetate and 80% mancozeb had better control of the disease than 95% pyraclostrobin. [Conclusions] The root rot of pear plant that occurred in
动态增强MRI定量评估喉及下咽鳞癌同步放化疗近期疗效研究
郭炜,罗德红,李琳,赵燕,,杨亮,胡镭,赵心明,周纯
- , 2016, DOI: 10.13609/j.cnki.1000-0313.2016.08.003
Abstract: 【摘要】 目的:探讨MRI动态增强扫描(DCE-MRI)对喉及下咽鳞癌同步放化疗近期疗效的预测价值。方法:2014年12月-2015年12月经本院喉镜活检病理证实并行同步放化疗的喉(10例)及下咽(26例)鳞癌患者共36例,于治疗前行DCE-MRI检查,并在放疗剂量累积达50Gy时行治疗中MRI复查。根据治疗结束后肿瘤缓解情况,将患者分为完全缓解组(CR)及部分缓解组(PR)。测量DCE-MRI定量参数值,包括容积转移常数(Ktrans)、速率常数(Kep)和血管外细胞外容积分数(Ve),分别比较三者在CR组与PR组间的差异,并绘制ROC曲线评估各定量参数预测喉及下咽鳞癌同步放化疗近期疗效的效能。结果:36例患者在同步放化疗后达CR20例,PR16例。喉癌和下咽癌两组间治疗前DCE-MRI各定量参数比较,差异均无统计学意义(P>0.05)。CR组治疗前Ktrans、Kep和Ve值分别为(0.307±0.055)min-1、(0.527±0.114)min-1和0.587±0.045, PR组的相应值分别为(0.234±0.049)min-1/min、(0.390± 0.090)min-1和0.602±0.037。两组比较,Ktrans和Kep的差异均有统计学意义(P<0.05),Ve的差异无统计学意义(P>0.05)。ROC曲线分析,以Ktrans=0.283min-1为阈值,预测同步放化疗后达CR的曲线下面积(AUC)、敏感度及特异度分别为0.839、70.0%和81.2%;以Kep=0.446min-1为阈值,预测同步放化疗后达CR的AUC、敏感度及特异度分别为0.809、75.0%和75.0%。结论:DCE-MRI定量参数有助于预测喉及下咽鳞癌同步放化疗的近期疗效
MRI联合超声诊断胎儿结节性硬化症
余旭东,杨文忠,,兰为顺,夏薇,苏永学,陈欣,杨小红,超
- , 2015, DOI: 10.13609/j.cnki.1000-0313.2015.10.017
Abstract: 【摘要】目的:探讨胎儿结节性硬化症(TSC)的产前MRI诊断方法及影像特征。方法:回顾性分析产前MRI联合超声诊断为TSC的14例胎儿资料,并总结其影像特征。MRI主要采用快速成像即HASTE序列及DWI序列,部分胎儿结合T1WI (FL2D)扫描。结果:产前超声筛查发现心脏横纹肌瘤胎儿共22例,MRI检查发现14例胎儿脑部见室管膜下结节,5例同时合并脑皮质结节。14例胎儿均诊断为TSC。胎儿脑部结节表现为T1WI稍高信号,HASTE序列低信号结节,以HASTE序列显示最佳。本组14例TSC胎儿9例终止妊娠引产,其中2例引产后标本解剖病检,证实为心脏横纹肌瘤伴颅内结节;5例出生后随访证实为TSC。结论:产前超声检查可准确诊断胎儿心脏横纹肌瘤。超声提示心脏横纹肌瘤后,MRI对诊断胎儿TSC颅脑病变敏感性高。MRI联合超声可以确诊胎儿TSC
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