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Beyond Gender Perspectives:A More Comprehensive Examination of Yang Yi’s Translation of Wuthering Heights
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作者 LIU Miao 《Sino-US English Teaching》 2024年第7期332-336,共5页
The renowned translator Yang Yi passed away in 2023.Many scholars argue that,influenced by their biological gender,female translators often employ translation methods in adherence to feminist translation or reflect ch... The renowned translator Yang Yi passed away in 2023.Many scholars argue that,influenced by their biological gender,female translators often employ translation methods in adherence to feminist translation or reflect characteristics typical of female translators.This study examines the translation of Wuthering Heights by Yang Yi,focusing on whether there is a definite influence of gender on translator behavior.While existing literature primarily analyzes Yang Yi’s work through a feminist lens,this research takes a broader approach.By considering the translator’s social background and translation practice,this paper challenges the assumption that her work strictly aligns with feminist translation theories.Instead,this study emphasizes the importance of considering diverse factors when interpreting translated works,moving beyond a singular gender-based standpoint. 展开更多
关键词 geNDER TRANSLATION Yang yi Wuthering Heights FEMINISM
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平胃胶囊对恶变后GES-1细胞氧化应激的抑制作用及机制研究 被引量:1
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作者 王丽娟 汪龙德 +4 位作者 牛小英 汪霞 张瑞婷 吴毓谦 樊泽坤 《中国病理生理杂志》 CAS CSCD 北大核心 2024年第1期58-67,共10页
目的:观察平胃胶囊对亚硝酸胺类化合物N-甲基-N’-硝基-N-亚硝基胍(N-methyl-N’-nitro-N-nitrosoguanidine,MNNG)诱导的胃癌前病变(precancerous lesions of gastric cancer,PLGC)细胞模型的影响,并初步探讨其作用机制。方法:制备空白... 目的:观察平胃胶囊对亚硝酸胺类化合物N-甲基-N’-硝基-N-亚硝基胍(N-methyl-N’-nitro-N-nitrosoguanidine,MNNG)诱导的胃癌前病变(precancerous lesions of gastric cancer,PLGC)细胞模型的影响,并初步探讨其作用机制。方法:制备空白血清和平胃胶囊含药血清备用;MNNG诱导人胃黏膜上皮细胞系GES-1制备PLGC细胞模型,采用倒置显微镜观察细胞形态,免疫荧光法检测增殖细胞相关抗原Ki67的表达水平,进行模型评价。CCK-8法筛选含药血清最佳干预浓度及时间;采用荧光探针DCFH-DA检测细胞内活性氧(reactive oxygen species,ROS)含量;ELISA检测丙二醛(malondialdehyde,MDA)含量;采用相关试剂盒检测超氧化物歧化酶(superoxide dismutase,SOD)和谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-Px)活性;采用新型荧光探针JC-10检测细胞线粒体膜电位的变化;采用实时荧光定量PCR检测Ki67和黑色素瘤分化相关基因7(melanoma differentiation-associated gene-7,MDA-7)的mRNA表达水平;采用Western blot法测定Ki67、白细胞介素6(interleukin-6,IL-6)和MDA-7的蛋白表达水平。结果:与正常组相比,模型组和空白血清组ROS和MDA含量显著升高(P<0.01),SOD和GSH-Px的活性显著降低(P<0.01),线粒体膜电位显著下降(P<0.01),Ki67和IL-6蛋白表达显著升高(P<0.01),MDA-7蛋白表达显著下降(P<0.01);与空白血清组相比,模型组ROS和MDA含量,SOD和GSH-Px活性,Ki67和MDA-7 mRNA表达水平,Ki67、IL-6和MDA-7蛋白表达水平,以及线粒体膜电位均无显著差异(P>0.05);与空白血清组相比,平胃胶囊含药血清组中ROS和MDA含量显著降低(P<0.01),SOD和GSH-Px活性显著上升(P<0.05),线粒体膜电位显著升高(P<0.01),Ki67和IL-6蛋白表达水平显著下降(P<0.01),MDA-7的mRNA及蛋白表达水平显著升高(P<0.01)。结论:平胃胶囊可显著减轻MNNG诱导的胃黏膜上皮细胞氧化应激损伤和炎症反应,调控促癌基因和抑癌基因的表达,从而发挥防治PLGC的作用。 展开更多
关键词 平胃胶囊 胃癌前病变 geS-1细胞 氧化应激
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Traditional Chinese medicine “Qing Yi Tang” alleviates oxygen free radical injury in acute necrotizing pancreatitis 被引量:8
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作者 LI ZhanLiang1, WU ChengTang2, LU LianRong, ZHU XiaoFeng and XIONG DeXinKeywords pancreatitis/therapy Qing Yi Tang +2 位作者 free radicals superoxide dismutase/analysis malonyldiadehyde/analysis 《World Journal of Gastroenterology》 SCIE CAS CSCD 1998年第4期85-87,共3页
AIM To observe the changes in oxygen free radical (OFR) and the curative effect of traditional Chinese medicine 'Qing Yi Tang' in acute necrotizing pancreatitis (ANP).METHODS After induction of ANP by injectio... AIM To observe the changes in oxygen free radical (OFR) and the curative effect of traditional Chinese medicine 'Qing Yi Tang' in acute necrotizing pancreatitis (ANP).METHODS After induction of ANP by injection of sodium taurocholate into pancreatic duct, 16 dogs were randomly divided into control group and Chinese medicine group. Serum amylase, SOD and MDA were determined on postoperative day 1, 2, 4 and 7. The animals were sacrificed on day 7. SOD and MDA in organs were determined, and pathological changes in pancreas were observed.RESULTS As compared with control group, the serum level of amylase (734U/L vs 2783U/L) and MDA (7.8nmol/ml vs 14.8nmol/ml) in Chinese medicine group were decreased on day 7 (P<0.05), while SOD increased significantly (281nU/ml vs 55nU/ml, P<0.01), and similar changes occurred in MDA and SOD in organs, especially in the pancreas; the pathological changes in the pancreas were alleviated as well.CONCLUSION 'Qing Yi Tang' is effective in clearing OFRs and alleviating pathological changes in ANP. 展开更多
关键词 pancreatitis therapy Qing yi Tang free radicals superoxide dismutase analysis malonyldiadehyde analysis
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山橿中生物碱类成分Laetanine、Launobine对乙酸致GES-1细胞损伤的保护作用及机制
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作者 李文博 任伟宏 孙孝亚 《中国现代医药杂志》 2024年第5期1-8,共8页
目的利用乙酸建立胃黏膜上皮细胞(GES-1细胞)损伤模型,研究山橿中生物碱类成分Laetanine、Launobine对GES-1细胞损伤的保护作用及机制。方法通过MTT细胞增殖/毒性实验确定Laetanine、Launobine的最佳给药浓度。分别以浓度为0.01%~0.2%... 目的利用乙酸建立胃黏膜上皮细胞(GES-1细胞)损伤模型,研究山橿中生物碱类成分Laetanine、Launobine对GES-1细胞损伤的保护作用及机制。方法通过MTT细胞增殖/毒性实验确定Laetanine、Launobine的最佳给药浓度。分别以浓度为0.01%~0.2%的乙酸培养液作用于GES-1细胞,作用时间分别为3、4、5h,筛选最佳造模条件。利用乙酸建立GES-1细胞损伤模型,测定Laetanine、Launobine含药培养基处理后的细胞存活率;Griess法测定细胞上清液中NO的浓度;ELISA法测定各组细胞上清液中肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)和前列腺素E2(PGE2)水平;WST-1法检测各实验组超氧化物歧化酶(SOD)抑制率,计算SOD活力值。结果0.1%乙酸溶液处理3h为GES-1细胞损伤的最佳造模条件;与模型组比较,Laetanine、Launobine给药组均能显著升高GES-1细胞存活率(P<0.01);经Laetanine、Launobine处理后,细胞上清液中的NO、TNF-α、IL-6和PGE2水平显著降低,SOD活力显著升高(P<0.01或P<0.05)。结论山橿中生物碱类成分Laetanine和Launobine均能保护乙酸损伤的GES-1细胞,减轻GES-1细胞的受损程度,其作用机制可能与其降低NO、TNF-α、IL-6和PGE2水平,升高SOD水平有关,表明Laetanine和Launobine可能为山橿发挥抗胃溃疡作用的有效成分。 展开更多
关键词 山橿 生物碱 Laetanine Launobine 胃溃疡 geS-1细胞 保护 机制
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The Mode of Promoting Industrial Targeted Poverty Alleviation through Land Circulation in Western Mountainous Region of China——A Case Study of Luquan Yi and Miao Autonomous County in Yunnan Province 被引量:1
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作者 Jing LIU Zisheng YANG +4 位作者 Ying XIONG Yanbo HE Chonghui LU Yimei HE Renyi YANG 《Asian Agricultural Research》 2019年第2期68-79,共12页
In the industrial targeted poverty alleviation,land circulation is a key process. Based on the national strategy of targeted poverty alleviation,this paper combined the industrial development of targeted poverty allev... In the industrial targeted poverty alleviation,land circulation is a key process. Based on the national strategy of targeted poverty alleviation,this paper combined the industrial development of targeted poverty alleviation with land circulation. According to the field survey on the current situation of land circulation and promotion of the industrial poverty alleviation in the typical project area of Zhongping Village in Zhongping Town and Jiaowuying Village in Jiulong Town in Luquan Yi and Miao Autonomous County in Yunnan Province,located in the high mountain canyon area of Jinsha River in the upper reaches of the Yangtze River in the west of China. This paper summarized and analyzed the organization and operation mechanism,basic practices and main results of the land circulation and promotion of industrial poverty alleviation model in the typical project area of the county. It also summarized the innovation and successful experience of the model,and then came up with measures to further promote the implementation of the model,so as to provide necessary reference for the implementation of land circulation and industrial targeted poverty alleviation for the poverty-stricken counties in Yunnan Province and similar provinces( cities,regions). 展开更多
关键词 TARgeTED POVERTY alleviation Land circulation Industrial POVERTY alleviation Mode Luquan yi and MIAO AUTONOMOUS COUNTY
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基于FLUKA蒙卡程序模拟放射性核素^(68)Ge生产的产额研究
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作者 王哲 安世忠 +6 位作者 赵云龙 王飞 官国英 陆潞 魏素敏 冀鲁豫 边天剑 《同位素》 CAS 2024年第6期549-554,共6页
为了开展Ge-Ga发生器技术研究,需要开展^(68)Ge生产小试实验。本研究基于FLUKA蒙卡程序模拟了医用放射性核素68Ga的母体核素^(68)Ge的生产,计算了14、30、70 MeV质子束分别在100、200、500μA束流强度下照射富集69Ga的镓金属靶1、12、2... 为了开展Ge-Ga发生器技术研究,需要开展^(68)Ge生产小试实验。本研究基于FLUKA蒙卡程序模拟了医用放射性核素68Ga的母体核素^(68)Ge的生产,计算了14、30、70 MeV质子束分别在100、200、500μA束流强度下照射富集69Ga的镓金属靶1、12、24 h后^(68)Ge的EOB(end of bombardment)产额,并对产额的变化以及靶上放射性核素活度进行分析。30 MeV/500μA质子束打靶24 h后^(68)Ge核素的EOB产额为3.13×10^(10) Bq,与70 MeV/500μA质子束的4.54×10^(10) Bq相当,但是靶上放射性杂质核素较少,30 MeV质子回旋加速器投入产出效益高。通过研究确定^(68)Ge核素生产的质子能量选择为30 MeV,可为^(68)Ge的生产小试实验及批量生产提供理论依据和技术支持。 展开更多
关键词 FLUKA 放射性核素 ^(68)ge 产额
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基于gE蛋白的羊伪狂犬病病毒间接ELISA的建立与应用
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作者 刘广阔 吴发兴 +4 位作者 于皓同 王凯茸 张锐铮 张琪 许信刚 《动物医学进展》 北大核心 2024年第3期28-33,共6页
为建立羊源伪狂犬病病毒(Pseudorabies virus,PRV)抗体的检测方法,从PRV中对gE基因进行克隆,并构建重组载体对gE蛋白进行原核表达,以重组gE蛋白为包被抗原,建立PRV抗体间接ELISA检测方法,并进行临床样本检测。结果显示,重组gE蛋白大小为... 为建立羊源伪狂犬病病毒(Pseudorabies virus,PRV)抗体的检测方法,从PRV中对gE基因进行克隆,并构建重组载体对gE蛋白进行原核表达,以重组gE蛋白为包被抗原,建立PRV抗体间接ELISA检测方法,并进行临床样本检测。结果显示,重组gE蛋白大小为42 ku,以包涵体形式表达;Western blot检测表明重组蛋白具有良好的反应原性;重组蛋白作为包被抗原的最佳工作浓度为1μg/mL,待检血清100倍稀释,以HRP标记的兔抗山羊IgG 10000倍稀释作为二抗;检测临床样本时判定阴阳性的临界值为0.284;灵敏性试验结果显示,羊PRV阳性血清稀释2048倍时检测结果仍为阳性;批内变异系数(2.45%~5.00%)与批间变异系数(2.55%~7.41%)均小于10%;采用建立的方法检测其他常见羊源病毒阳性血清结果均为阴性;对收集的376份临床羊血清进行检测,PRV阳性率为10.6%。建立的间接ELISA检测方法可用于羊源样本中伪狂犬病病毒抗体的检测,该方法的建立为羊场PRV抗体检测提供了技术支持。 展开更多
关键词 羊伪狂犬病 伪狂犬病病毒 ge蛋白 间接ELISA
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Analysis of Genetic Diversity of Four Subpopulations of Chimonobambusa rivularis Yi in Sichuan 被引量:1
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作者 C. Y. Yang S. P. Gao +3 位作者 B. Wang Q. B. Chen L. J. Yang W. D. Liu 《Journal of Agricultural Science and Technology(B)》 2011年第1期95-100,共6页
A study of the genetic diversity within four subpopulations of Chimonobambusa rivularis Yi and adaptations to altitude, habitat and related factors in Qionglai City of Sichuan province in China, analyzed by random amp... A study of the genetic diversity within four subpopulations of Chimonobambusa rivularis Yi and adaptations to altitude, habitat and related factors in Qionglai City of Sichuan province in China, analyzed by random amplified polymorphic DNA technique. 22 random primers were selected in the amplification and 375 repetitive loci with 350 polymorphic loci were produced. The total average percentage of amplification loci was 93.3%. The genetic diversity of every subpopulation was medium on (the percentage of amplification loci was 49.33%-66.67%). The genetic diversity of high altitude samples of Zhengtiantai was lower than that of low altitude Wutonggang's. There was no obvious differentiation between two subpopulations of Zhengtiantais. The correlation is very low between altitude and the amplification loci and the genetic distance, Pearson correlation coefficient was 0.431 and 0.488 (P 〈 0.01). Through investigation, the primary cause of heredity multiplicity drops was that the habitat had been destroyed by tourism development and other human disturbance. 展开更多
关键词 Chimonobambusa rivularis yi DNA-RAPD SUBPOPULATION genetic diversity altitude.
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Planning and Designing of Eco-villages in Urban and Rural Areas——A Case Study of Hongbao Hundred-fruit Eco-village in Chuxiong Yi Autonomous Prefecture, Yunnan Province
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作者 鲍亦川 陈晓刚 +1 位作者 胡文笑 林娅 《Agricultural Science & Technology》 CAS 2017年第2期310-313,共4页
The research reviewed connotation, characteristics and significance of urban-rural eco-village and concluded approaches to eco-village planning from site selection, function division, environment and product selection... The research reviewed connotation, characteristics and significance of urban-rural eco-village and concluded approaches to eco-village planning from site selection, function division, environment and product selection. Finally, a case study of Hongbao Hundred-fruit Eco-village was introduced. 展开更多
关键词 Co-village Planning theory Chuxiong yi Autonomous Prefecture in Yunnan Province
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基于中高能回旋加速器生产^(68)Ge核素的产额及产物模拟研究
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作者 赵云龙 安世忠 +7 位作者 官国英 王哲 王飞 李勇 魏素敏 周佳 王宇 赵鹏飞 《同位素》 CAS 2024年第6期555-561,共7页
^(68)Ge是正电子扫描(PET)诊断显像用放射性核素^(68)Ga的母体核素,^(68)Ge通过^(68)Ge/^(68)Ga发生器转化为^(68)Ga已在临床诊断显像中获得应用。国内目前有13种^(68)Ga标记的放射性药物已进入临床,在神经内分泌肿瘤、前列腺癌等肿瘤... ^(68)Ge是正电子扫描(PET)诊断显像用放射性核素^(68)Ga的母体核素,^(68)Ge通过^(68)Ge/^(68)Ga发生器转化为^(68)Ga已在临床诊断显像中获得应用。国内目前有13种^(68)Ga标记的放射性药物已进入临床,在神经内分泌肿瘤、前列腺癌等肿瘤显像方面具有较好的应用前景。随着^(68)Ga放射性药物的获批和大量使用,^(68)Ge在国内外市场的应用前景广阔。此外,^(68)Ge也可以作为PET扫描仪的校准源而获得广泛使用。中国原子能科学研究院目前计划建造一台专用于放射性医用同位素生产、能量为75 MeV、最高束流流强800μA的强流质子回旋加速器,将重点开展^(68)Ge的生产。本研究利用蒙特卡罗程序FLUKA对中高能质子回旋加速器辐照镓镍合金靶和铌镓胶囊靶等方式生产^(68)Ge核素的产额、反应产物、杂质核素产额随冷却时间的变化、影响分离工艺的长寿命核素情况等进行详细模拟,本结果可为中高能质子回旋加速器生产^(68)Ge的生产和分离纯化提供参考。 展开更多
关键词 75 MeV回旋加速器 ^(68)ge 蒙特卡罗模拟 同位素生产
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Yi Qi Jie Du Decoction Inhibits Proliferation and Induces Apoptosis of Nasopharyngeal Carcinoma Stem Cells Through Mitochondrial Apoptosis Pathway 被引量:5
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作者 ZHOU Fang-Liang HE Lan +4 位作者 HE Dan WANG Xian-Wen SHI Hong-Jian HE Ying-Chun CAO De-Liang 《Digital Chinese Medicine》 2019年第4期219-226,共8页
Objective To assess the effects of Yi Qi Jie Du Decoction(YQJDD)on nasopharyngeal carcinoma stem cells(NPC-SCs)and investigate the underlying mechanism.Methods NPC-SCs were collected in serum-free culture system and i... Objective To assess the effects of Yi Qi Jie Du Decoction(YQJDD)on nasopharyngeal carcinoma stem cells(NPC-SCs)and investigate the underlying mechanism.Methods NPC-SCs were collected in serum-free culture system and identified by the sphere formation assay.The effect of YQJDD on the proliferation of NPC-SCs was detected using the Cell Counting Kit-8 assay.The change of mitochondrial membrane potential(ΔΨm)in NPC-SCs following treatment with YQJDD was investigated by JC-1 staining.The levels of apoptosisassociated proteins were examined using western blot analysis.Results YQJDD significantly inhibited the proliferation of NPCSCs in dose-and time-dependent manners.JC-1 staining revealed that YQJDD lowered theΔΨm of NPC-SCs in a timedependent manner.After treatment with YQJDD,the expression of cleaved caspase-3,-7 and-9,cleaved poly-ADP ribose polymerase,P21 and P53 were increased,while the expression of Survivin in NPC-SCs was decreased.However,the expression of cleaved caspase-8 remained nearly unchanged.Conclusions YQJDD inhibits the growth and induces apoptosis of NPC-SCs via an intrinsic apoptosis pathway. 展开更多
关键词 Nasopharyngeal carcinoma(NPC) yi Qi Jie Du Decoction(YQJDD) APOPTOSIS Cancer stem cells Mitochondrial apoptosis pathway
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砂仁挥发性成分及其对GES-1细胞保护作用的比较分析 被引量:1
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作者 周小妹 张迎 +5 位作者 罗明权 练勇 程倩颖 靳德军 孔奕丹 魏娜 《海南医学院学报》 CAS 北大核心 2024年第10期721-730,共10页
目的:分析阳春砂、绿壳砂、海南砂及其伪品海南假砂的挥发性成分,比较四种砂仁挥发油对胃黏膜保护的活性。方法:采用顶空固相微萃取技术与气相色谱-质谱联用技术(HS-SPME-GC-MS),结合NIST08和NIST08s谱库对比定性色谱结果,分析4种砂仁... 目的:分析阳春砂、绿壳砂、海南砂及其伪品海南假砂的挥发性成分,比较四种砂仁挥发油对胃黏膜保护的活性。方法:采用顶空固相微萃取技术与气相色谱-质谱联用技术(HS-SPME-GC-MS),结合NIST08和NIST08s谱库对比定性色谱结果,分析4种砂仁的挥发性成分;采用面积归一化法,计算各挥发性成分的相对百分比含量,并进行主成分及热图分析;建立人胃黏膜上皮细胞(GES-1细胞)损伤模型,采用CCK-8法,对4种砂仁挥发油进行胃黏膜保护活性评价。结果:从阳春砂、绿壳砂、海南砂及其海南假砂中共检出114种化学成分,分别鉴定出57、58、58、58种成分,各占总挥发性成分相对百分比含量的93.23%、88.79%、90.87%、91.40%,其中总单萜烃类化合物各占总挥发性成分相对百分比含量的40.48%、37.77%、37.09%、33.39%,总倍半萜烃类化合物各占总挥发性成分相对百分比含量的52.53%、49.88%、31.22%、35.45%;阳春砂、绿壳砂、海南砂挥发油对乙醇致GES-1细胞损伤具有保护作用(P<0.05),海南假砂无明显活性。结论:阳春砂与绿壳砂的挥发性成分及含量差异较小,而海南砂、海南假砂与阳春砂、绿壳砂的挥发性成分及含量差异较大;阳春砂、绿壳砂、海南砂挥发油具有一定的胃黏膜保护活性。 展开更多
关键词 砂仁 挥发性成分 顶空固相微萃取气质联用 geS-1细胞
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GE LightSpeed Pro 16 CT伪影故障维修3例
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作者 魏昊业 柳青 宗会迁 《医疗卫生装备》 CAS 2024年第10期118-120,共3页
介绍了GE LightSpeed Pro 16 CT的组成,分析了该设备出现的3例伪影故障的现象、原因并提出了具体的排除方法,为临床工程人员维修类似故障提供了参考。
关键词 ge LightSpeed Pro 16 CT CT伪影 故障维修
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Yi Qi Jie Du Formula and Salinomycin Combination Treatment Mediates Nasopharyngeal Carcinoma Stem Cell Proliferation,Migration and Apoptosis via CD44/Ras Signaling Pathway 被引量:7
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作者 HE Lan ZHOU Fang-Liang +5 位作者 ZOU Pan WANG Xian-Wen JIANG Yi-Lan HE Ying-Chun LIAO Duan-Fang CAO De-Liang 《Digital Chinese Medicine》 2020年第4期297-308,共12页
Objective To assess the effects of Yi Qi Jie Du Formula(YQJDF)combined with salinomycin(SAL)on nasopharyngeal carcinoma stem cells(NPC-SCs)and investigate the underlying molecular mechanisms.Methods Cell counting meth... Objective To assess the effects of Yi Qi Jie Du Formula(YQJDF)combined with salinomycin(SAL)on nasopharyngeal carcinoma stem cells(NPC-SCs)and investigate the underlying molecular mechanisms.Methods Cell counting methods,the CCK-8 assay,transwell migration assay and JC-1 staining,were used to observe the effects of the combination on the proliferation,migration and apoptosis of NPC stem cells,respectively.Western blot was used to detect the levels of protein in NPC-SCs.Results YQJDF combined with SAL had a synergistic effect on the inhibition of proliferation and migration and induction of NPCSC apoptosis.Mechanistically,YQJDF combined with SAL synergistically upregulated the levels of apoptotic proteins,including cleaved Caspase-3,cleaved Caspase-7 and cleaved Caspase-9.Moreover,YQJDF combined with SAL synergistically decreased the levels of CD44,p-c-Src,Ras,p-PKCδ,p-MEK,p-c-Raf,p-ERK1/2 and p-AKT proteins.Conclusions The combination of YQJDF and SAL has a synergistic effect on the inhibition of NPC-SC proliferation and migration and induction of apoptosis,which may be closely related to the downregulation of the CD44/Ras signaling pathway. 展开更多
关键词 yi Qi Jie Du Formula(YQJDF) SALINOMYCIN Nasopharyngeal carcinoma stem cells (NPC-SCs) PROLIFERATION Apoptosis CD44/Ras signaling pathway
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七星关区耕地土壤Ge地球化学特征及其与作物的吸收关系
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作者 张宏伟 杨恩林 +2 位作者 焦树林 王贵云 杨善进 《物探与化探》 CAS 2024年第2期534-544,554,共12页
掌握耕地土壤Ge含量特征及其与作物的吸收关系,对耕地Ge的开发利用及科学选种具有重要意义。为此,以贵州省七星关区土地质量地球化学调查评价项目数据为基础,统计Ge的地球化学参数,分析该区土壤Ge地球化学特征和作物对Ge的吸收规律。结... 掌握耕地土壤Ge含量特征及其与作物的吸收关系,对耕地Ge的开发利用及科学选种具有重要意义。为此,以贵州省七星关区土地质量地球化学调查评价项目数据为基础,统计Ge的地球化学参数,分析该区土壤Ge地球化学特征和作物对Ge的吸收规律。结果显示:七星关区耕地土壤Ge含量在(0.86~2.48)×10^(-6),平均值1.74×10^(-6),与全国土壤Ge背景值相当。通过地统计分析,圈定富Ge耕地面积65853.54 hm^(2),占全区耕地总面积的47.41%,主要分布于研究区西北和西南部。农作物对土壤Ge的生物吸收系数(Ax)均小于1%,均处于极弱摄取水平。采用相关分析等方法讨论耕地土壤富Ge成因及影响作物吸收Ge的环境因子,得出以下结论:①土壤Ge含量主要受成土母质控制,同时受到风化成土过程的影响,并在七星关区耕地有机质含量丰富和偏酸性的土壤背景下,造成土壤Ge富集;②酸性土壤中,作物对土壤Ge的生物吸收系数(Ax)与pH呈弱负相关关系,而在中—碱性土壤中,作物对土壤Ge的生物吸收系数(Ax)与pH呈正相关关系,即偏酸性土壤是导致作物对Ge生物吸收能力低的原因。 展开更多
关键词 耕地土壤 ge 地球化学特征 生物吸收 七星关区
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加速器制备^(68)Ge产额计算方法 被引量:2
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作者 高陶 胡圣 余伟 《同位素》 CAS 2024年第2期126-132,共7页
^(68)Ga是最具临床应用价值的金属正电子核素之一,通过^(68)Ge/^(68)Ga发生器生产^(68)Ga是一种比较便捷的方式,而母体核素^(68)Ge主要由加速器生产,其中使用较多的一种生产方式是通过质子辐照Ga-Ni合金靶件获得^(68)Ge。准确模拟^(68)G... ^(68)Ga是最具临床应用价值的金属正电子核素之一,通过^(68)Ge/^(68)Ga发生器生产^(68)Ga是一种比较便捷的方式,而母体核素^(68)Ge主要由加速器生产,其中使用较多的一种生产方式是通过质子辐照Ga-Ni合金靶件获得^(68)Ge。准确模拟^(68)Ge产额,对于Ga-Ni合金靶件制备、加速器辐照方案选择和生产准备均有重要意义。本研究提出了一种基于蒙特卡罗方法的加速器生产^(68)Ge的理论产额计算方法,计算了不同条件下质子束流轰击Ga-Ni合金靶件的能量损耗和^(68)Ge理论产额,并通过加速器辐照实验验证了计算结果的可靠性。相关结果可为不同能量质子束流辐照条件下的Ga-Ni合金厚度设计提供参考,对实验结果具有指导意义。 展开更多
关键词 产额计算 Ga-Ni合金 ^(68)ge ^(68)ge/^(68)Ga发生器
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Ag/Ge核壳颗粒的结构设计及红外光学特性的理论研究
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作者 王新飞 刘东青 程海峰 《材料工程》 EI CAS CSCD 北大核心 2024年第10期183-188,共6页
为获得符合光谱选择性辐射红外隐身需求的颗粒,利用Mie散射理论和有限元仿真分别对Ag/Ge核壳结构的红外光学特性进行计算。研究了不同Ag内核和Ge外壳尺寸组合下颗粒消光效率峰值随波长的变化。在6.5μm等值线上等间隔的选取不同尺寸组合... 为获得符合光谱选择性辐射红外隐身需求的颗粒,利用Mie散射理论和有限元仿真分别对Ag/Ge核壳结构的红外光学特性进行计算。研究了不同Ag内核和Ge外壳尺寸组合下颗粒消光效率峰值随波长的变化。在6.5μm等值线上等间隔的选取不同尺寸组合,通过对比消光效率曲线确定了0.3/0.848μm的核壳结构为主要研究对象。不同计算方法获得的消光效率曲线形状十分近似,消光峰均位于6.5μm处,消光效率峰值分别为16.6和16.1,验证了计算结果的可靠性。对比颗粒在不同波长入射场下的三维远场辐射及电磁功率损耗情况,发现其在6.5μm处具有更强的辐射强度和功率损耗密度,说明此时颗粒与入射场能够发生强烈的共振作用,可用于该波段红外辐射的选择性吸收。 展开更多
关键词 Ag/ge核壳结构 光谱选择性辐射红外隐身 MIE散射理论 有限元仿真
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猪伪狂犬病病毒BJC变异株分离鉴定及gB和gE基因序列分析
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作者 娄昆鹏 李阳 +2 位作者 项伟 徐博 朱国强 《动物医学进展》 北大核心 2024年第9期20-26,共7页
为了确定伪狂犬病疑似发病猪场PRV变异株病原及其病毒分子特征,通过病理剖检、病毒分离鉴定与纯化、ST细胞TCID_(50)和小鼠LD_(50)测定,对分离鉴定的病毒gB、gE基因进行PCR扩增、回收、克隆和测序,用生物信息学分析软件Geneious Prime... 为了确定伪狂犬病疑似发病猪场PRV变异株病原及其病毒分子特征,通过病理剖检、病毒分离鉴定与纯化、ST细胞TCID_(50)和小鼠LD_(50)测定,对分离鉴定的病毒gB、gE基因进行PCR扩增、回收、克隆和测序,用生物信息学分析软件Geneious Prime对gB、gE基因进行遗传进化和同源性分析。结果显示,该分离株为PRV强毒株。该病毒在ST细胞生长良好,纯化后的病毒经测定半数组织培养感染量为10^(8.5)TCID_(50)/mL,对6周龄昆明小鼠的LD_(50)为10^(5.8)TCID_(50)。测序结果与预期的PRV gB、gE基因片段相符。遗传进化分析可知与国内代表PRV变异毒株如JS2012、HN1201、ZJ01等处于同一分支,与欧美分离株如Bartha、Kaplan、Becker等亲缘关系较远,处于不同的大分支。氨基酸序列分析表明,BJC株与国外经典毒株和国内早期分离毒株存在多个特征性位点替换,符合国内流行变异毒株特征,BJC株为PRV变异毒株。 展开更多
关键词 伪狂犬病毒病 分离鉴定 BJC株 gB、ge基因 序列分析
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GeS自由基光谱性质的理论研究
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作者 曹思雨 刘晓华 +4 位作者 于海超 阴爽 李建军 国慧杰 张存华 《高师理科学刊》 2024年第10期52-57,共6页
利用高精度多参考组态相互作用方法(MRCI)计算GeS分子能量最低解离极限Ge(^(3)P_(g))+S(^(3)P_(g))所对应的18个电子态的电子结构,为了获得更加精确的计算结果,在计算中考虑了芯-价电子关联效应(CV)和戴维森修正(+Q).基于理论计算的电... 利用高精度多参考组态相互作用方法(MRCI)计算GeS分子能量最低解离极限Ge(^(3)P_(g))+S(^(3)P_(g))所对应的18个电子态的电子结构,为了获得更加精确的计算结果,在计算中考虑了芯-价电子关联效应(CV)和戴维森修正(+Q).基于理论计算的电子态的本征能量和相同对称性电子态之间的避免交叉原则,绘制出最低解离极限对应的18个电子态的势能曲线(PECs).同时径向求解薛定谔方程拟合出束缚态的光谱常数并与早前的实验结果进行对比分析,吻合良好.通过MRCI方法计算Λ-S态电偶极矩(DMs)并分析其随核间距的变化趋势.最后对GeS分子基态到低激发态(1^(1)Π-X^(1)Σ^(+),1^(1)Σ^(+)-X^(1)Σ^(+))的跃迁性质进行了研究,包括偶极矩(TDMs)、弗兰克-康登因子(FCFs)与自发辐射寿命. 展开更多
关键词 geS分子 势能曲线 光谱常数 辐射寿命
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The Property of Nao Yi-an Granule (脑溢安颗粒) in Increasing Nestin Immunoreactive Neural Stem Cells in Rat Brains with Intracerebral Hemorrhage 被引量:2
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作者 唐涛 黎杏群 +3 位作者 武衡 罗杰坤 张花先 罗团连 《Chinese Journal of Integrated Traditional and Western Medicine》 2004年第4期284-288,共5页
Objective: To explore changes of neural stem cells (NSCs) following intracerebral hemorrhage (ICH) and the effect of Nao Yi-an granule (脑溢安颗粒, NYA) on them, and furthermore, to explore NYA's therapeutic mecha... Objective: To explore changes of neural stem cells (NSCs) following intracerebral hemorrhage (ICH) and the effect of Nao Yi-an granule (脑溢安颗粒, NYA) on them, and furthermore, to explore NYA's therapeutic mechanism Methods: Sixty rats were randomly divided into three groups, the sham operation control group, the ICH group and the NYA-treated group. Except those in the sham operation control group, all other rats were replicated to ICH models by stereotactical injection of collagenase type Ⅶ into their globus pallidus. After modeling, the rats in the NYA-treated group were administered with NYA at the dosage of 4. 92 g·kg-1·d-1 by gastrogavage, while those in the other two groups, 4 ml distilled water were given instead. The behavioral test was used to evaluate neurological deficit and immunohistochemical method was used to detect Nestin expression, the special marker for neural stem cells. Results: The ICH animals showed notable placing deficit in forlimbs from day 1 to day 28 after modeling. The deficit in the NYA-treated group was similar to that of the ICH group, but the former got recovered better than the latter from day 21 to 28, with significant difference shown ( P<0.05). Nestin-positive cells (N+ cells) could be seen around the hemotoma from day 2 on in the ICH group, the number of which gradually increased from day 4 to 7 ( P< 0.01) and reached the peak on day 14 (P<0.05), but reduced significantly on day 28 (P<0.01). Compared with that of the ICH group at the same time points , there was no significant difference in number of N+ cells in the NYA group on day 2 and 4, but it reached the peak earlier on day 7(P<0.01),with the level significantly higher than that in the ICH group( P<0. 01), and this high level lasted to day 14. Conclusion: NYA could promote the recovery of behavioral deficit in collagenase type Ⅶ-induced ICH rats, and increase the number of nestin-immunoreactive NSCs, suggesting that its effect on NSCs may be one of its pharmaceutical mechanisms in treating ICH. 展开更多
关键词 Nao yi-an granule neural stem cell intracerebral hemorrhage rats
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