72 research outputs found

    A Study on the Functions of Good Faith in CISG

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    内容摘要 在国际贸易中遵守诚实信用是维持交易正常进行的基础,1980年的《联合国国际货物销售合同公约》(英文名为UnitedNationsConventiononContractsfortheInternationalSaleofGoods,以下简称《公约》或CISG)首次将诚实信用写入了联合国国际贸易法委员会主持下签订的国际公约。然而,《公约》有关诚实信用的规定过于简略,英美法系与大陆法系的学者对《公约》中诚实信用应发挥何种作用尚有争议,这影响了《公约》的统一适用。本文研究《公约》中的诚实信用,旨在探讨在《公约》的解释与适用中诚实信用应有的恰当功能,从而对正确理解和适用《公约》中的诚实信用...ABSTRACT Good faith is always abided by people in international trade and it has been introduced into the United Nations Convention on Contracts for the International Sale of Goods ("CISG"). However, the wording of the Convention about good faith is so ambiguous that the functions of good faith in CISG arouses debates between scholars form common law and civil law which affected the uniform en...学位:法学硕士院系专业:法学院法律系_国际法学(含国际公法、国际私法、国际经济法)学号:20010806

    冬青油真伪鉴别方法研究

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    通过比较傅里叶变换红外光谱技术(FTIR)、气相色谱-质谱联用技术(GC-MS)、核磁共振波谱技术(NMR)、气相色谱-燃烧-稳定同位素比值质谱技术(GC-C-IRMS),建立了有效鉴别天然冬青油的方法。FTIR结果表明,样品均含有天然冬青油的官能团;GC-MS结果表明其主成分均为水杨酸甲酯;而NMR定性结果显示样品均为水杨酸甲酯的C、H结构,并利用核磁共振对样品进行了绝对定量;碳、氢稳定同位素测定结果显示天然冬青油、冬青油的δD、δ13C值偏负,合成水杨酸甲酯、疑似合成冬青油的δD、δ13C值偏正。结果表明,稳定同位素比值质谱技术可以有效鉴别天然冬青油。广东省普通高校特色创新项目(650465)广东石油化工学院自然科学研究项目(513036

    Studies on degradation mechanism of niclosamide ethanolamine salt Ⅰ Determination of niclosamide ethanolamine salt in photolysis solution

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    目的了解氯硝柳胺乙醇胺盐(nES)在水体中的光解规律。方法实验室配置PH5的0.05μg/Ml、PH7的0.5μg/Ml和PH9的2.5μg/MlnES溶液,采用氙灯光源作为模拟日光照射,照射后0、0.5、1、2、4、8、16、24、48、72、96H采集光解液,高效液相色谱法测定光解液中nES含量,同时设无光照对照试验,计算其半衰期。结果在氙灯光光照条件下,nES快速降解,8H3种PH值的nES溶液下降率分别为83.4%、78.8%和41.3%,24H下降率分别为92.1%、88.5%和95.8%。nESPH5半衰期为8.98H,PH7为10.34H,PH9为9.16H;无光照条件下放置12d溶液浓度稳定。结论nES可在水中快速光解。Objective To understand the photolysis mechanism of niclosamide ethanolamine salt(NES) in water body.Methods NES was formulated into solutions of pH 5(0.05 μg/ml),7(0.5 μg/ml) and 9(2.5 μg/ml),respectively.The xenon gas lamp was used as the simulated sunlight.After 0,0.5,1,2,4,8,16,24,48,72,96 h of the illumination,the photolysis solutions were collected to determine the amount of NES by using the high-performance liquid chromatography method(HPLC),and the experiment without illumination was also set as the control.The half-life was calculated.Results Under the illumination of xenon gas lamp,the NES degraded rapidly.The degradation rates were 83.4%,78.8% and 41.3%,respectively for 8 h,and 92.1%,88.5% and 95.8%,respectively for 24 h.The half-life of NES was 8.98 h for pH 5,10.34 h for pH 7,9.16 h for pH 9.The solution could keep stable for 12 d without illumination.Conclusion Photolysis of NES can occur quickly in water.江苏省自然科学基金(BK200602

    Studies on degradation mechanism of niclosamide ethanolamine salt Ⅱ Isotopic tracing and determination of photolysis end-product

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    目的观察同位素示踪技术解析氯硝柳胺乙醇胺盐(nES)在水体中的稳定性及测定光解终产物CO2的变化。方法实验室配制PH5的0.05μg/Ml、PH7的0.5μg/Ml和PH9的2.5μg/MlnES溶液,采用氙灯光源作为模拟日光照射上述nES溶液,照射8、16、24、32、40、48H和72H后,分别测定nES溶液在光解管顶的气态样品,采用gASbEnCHⅡ进样针插入直接分析;液体样品则取2.5Ml注入用高纯氦吹过的密封顶空样品瓶中,用加酸泵滴加无水磷酸,30℃超声反应1H,再插入gASbEnCHⅡ进样针进行分析;与dElTAPluS/XP稳定同位素质谱仪联用测定光解产物CO2的量及碳稳定同位素。结果在氙灯光光照条件下,PH70.5μg/Ml和PH92.5μg/MlnES溶液的光解,随光照时间的增加,CO2的量也增加,并呈线性增长,72H时其产量接近nES的实际产量。同位素结果显示,随光照时间的增加,CO2的碳同位素值逐渐变负,72H时接近nES原药的碳同位素值,为-25.36±0.11,光降解已接近完全。而PH50.05μg/MlnES溶液的光解,随光照时间的增加,CO2的量也在增加,但其产量超出了nES的实际产量;同位素结果显示,随光照时间的增加,产出CO2的碳同位素值逐渐变负,但在光照16H后其产CO2的碳同位素值比nES的碳同位素值偏负。结论 nES能够在水中快速光解,终产物为CO2。Objective To analyze the stability of niclosamide ethanolamine salt(NES)in water and determine the changes of CO2,the photolysis end-product,by using the isotopic tracing technique.Methods NES was formulated into the solutions of pH 5(0.05 μg/ml),pH 7(0.5 μg/ml)and pH 9(2.5 μg/ml),respectively.The xenon gas lamp was used as the simulated sunlight.After 8,16,24,32,40,48,72 h of the illumination,the gas samples of the NES solution on the top of photolysis tube were determined by using direct insertion of GasBenchII needle.For liquid samples,2.5 ml NES solution was added into a sealed empty bottle,which was treated with high pure helium,and then anhydrous phosphoric acid was added.After ultrasonic reaction at 30 ℃ for 1 h,the GasBenchII needle was inserted for analysis.The amount of CO2 and carbon isotopic value were determined by using the GasBenchII needle combined with isotopic mass spectrometer.Results Under the illumination of xenon gas lamp,the NES solutions of pH 7 and pH 9 occurred photolysis,with the increase of illumination time,the amount of CO2 increased,showing a linear increase.At 72 h,its yield approximated to the active output of NES.The isotopic tracing results showed,with the increase of illumination time,the carbon isotope value of CO2 turned to be negative gradually,and approximately reached to the carbon isotope value(-25.36±0.11‰)of NES active ingredient at 72 h when the photolysis approximated to be completely finished.For the photolysis of pH 5 NES solution,with the increase of illumination time,the amount of CO2 increased,however,its output was more than the active output of NES.The isotopic tracing results showed,with the increase of illumination time,the carbon isotope value of CO2 turned to be negative gradually.However,after illumination for 16 h,the carbon isotope value of CO2 was more negative than that of NES.Conclusions The photolysis of NES can occur rapidly in water,and the end product is CO2.江苏省自然科学基金(BK200602);江苏省卫生厅项目(X200504

    Biological nitrogen fixation in the upper water column in the south Taiwan Strait during summer 2011

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    2011年6—7月,利用15n2示踪法实测了台湾海峡南部海域的生物固氮速率,结合温度、盐度、天然颗粒物氮同位素组成的分布,分析并讨论了影响研究海域生物固氮速率的环境因素。结果表明,夏季台湾海峡南部海域的生物固氮速率介于168—1080 nMOl M-3d-1之间,平均为537 nMOl M-3d-1,较高的生物固氮速率大多出现在次表层水体中。研究站位的积分固氮速率变化范围为11—40μMOl M-2d-1,平均为23μMOl M-2d-1。积分固氮速率的空间变化与不同水团的影响有关,在受黑潮水影响的海域,生物固氮速率较高,而在上升流和受河流冲淡水影响的海域,生物固氮速率较低,说明较低的水温及较高的无机氮营养盐可能会抑制研究海域的生物固氮作用。研究海域天然颗粒物δ15n与生物固氮速率之间呈现良好的负相关关系,表明天然颗粒物氮同位素组成可定性指征研究海域生物固氮作用的强弱。Biological N2fixation in marine environments is a major component in the ocean nitrogen budget and plays an important role in global carbon cycles through the sequestration of atmospheric carbon dioxide and production of marine organic matter.N2fixation could be regulated by the abundance and chemical speciation of nutrients and many trace elements in seawater.Recent studies have revealed that N2fixation is much more widespread in marine environments than previously thought.However,little is known about the N2fixation in the Taiwan Strait,especially on N2fixation rates,and their relationship with environmental parameters.The major objectives of this study were to determine the N2fixation rates and their spatial distributions and to explore major physicochemical controlling factors in the south Taiwan Strait.During June and July 2011,seawater samples were collected from ten stations at two transects in the south Taiwan Strait for the measurements of N2fixation rate using the15N2tracer assay.Particulate nitrogen and its isotopic composition were measured with an elemental analyzer(Carlo Erba NC 2500) coupled with a Finnigan MAT DeltaplusXP isotope ratio mass spectrometer.Reproducibility of nitrogen isotope measurements(in terms of δ15N) was within 0.2‰.Our results showed that N2fixation rates in the south Taiwan Strait ranged from 168—1080 nmol m-3d-1with an average of 537 nmol m-3d-1.Most of the high rates were observed at subsurface layers.The depth-integrated N2fixation rates were 11—40 μmol m-2d-1with an average of(23±10) μmol m-2d-1.The distribution of the N2fixation rates showed regional variations with influence from water masses with distinctive temperature and salinity.Higher N2fixation rates were mostly observed in the regions influenced by the Kuroshio,with an average of 31 μmol m-2d-1,while lower rates occurred in the upwelling and river plume regions with an average of 15 μmol m-2d-1.This spatial distribution pattern indicated that biological N2fixation was largely impeded by the low temperature and the high concentration of dissolved inorganic nitrogen in the south Taiwan Strait.The contribution of N2fixation in the study area could be further quantified based on the δ15N signatures of suspended particles which could be significantly depleted during N2fixation.Indeed,a negative correlation between the δ15N signatures of suspended particles and N2fixation rates was observed regardless of using all data points or depth-averaged values within the water column.This indicated that15N-depleted particles were largely derived from the enhanced N2fixation,supporting the use of nitrogen isotopic composition(δ15N) of suspended particles as a potential indicator of N2fixation in the south Taiwan Strait.Further studies are needed to better elucidate the relationship between N2fixation rates and limiting elements and their chemical speciation,and thus the physical and biogeochemical controls on N2fixation in the south Taiwan Strait.国家自然科学基金资助项目(41125020;41076043;41206062); 国际海域资源调查与开发“十二五”项目(DY125-13-E-01

    下调基因PTTG1对人胶质瘤细胞SHG44增殖、凋亡、迁移和侵袭能力的影响

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    背景与目的:研究表明垂体瘤转化基因1(pituitary tumor-transforming gene 1,PTTG1)在多种癌症中高表达。该研究旨在探讨其对胶质瘤细胞SHG44增殖、凋亡、迁移和侵袭能力的影响。方法:用PTTG1 siRNA干扰胶质瘤细胞SHG44的基因表达,通过实时荧光定量聚合酶链反应(real-time fluorescence quantitative polymerase chain reaction,RTFQ-PCR)和蛋白质印迹法(Western blot)分别在mRNA和蛋白质水平上评估PTTG1沉默效率,进一步检测其对SHG44细胞增殖、凋亡、迁移和侵袭能力的影响。结果:沉默PTTG1基因表达可以显著抑制SHG44细胞增殖(P<0.05)、迁移(P<0.01)和侵袭(P<0.001)能力,增加细胞凋亡(P<0.05)。结论:下调PTTG1的表达可以降低神经胶质瘤的恶化程度,有望成为临床胶质瘤治疗的新靶点。福建省自然科学基金(2016D019);;\n福建省卫计委医学创新项目(2016-CXB-12

    类泛素蛋白及其中文命名

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    泛素家族包括泛素及类泛素蛋白,约20种成员蛋白.近年来,泛素家族领域取得了迅猛发展,并已与生物学及医学研究的各个领域相互交叉.泛素家族介导的蛋白质降解和细胞自噬机制的发现分别于2004和2016年获得诺贝尔奖.但是,类泛素蛋白并没有统一规范的中文译名. 2018年4月9日在苏州召开的《泛素家族介导的蛋白质降解和细胞自噬》专著的编委会上,部分作者讨论了类泛素蛋白的中文命名问题,并在随后的\"泛素家族、自噬与疾病\"(Ubiquitinfamily,autophagy anddiseases)苏州会议上提出了类泛素蛋白中文翻译草案,此草案在参加该会议的国内学者及海外华人学者间取得了高度共识.冷泉港亚洲\"泛素家族、自噬与疾病\"苏州会议是由美国冷泉港实验室主办、两年一度、面向全球的英文会议.该会议在海内外华人学者中具有广泛影响,因此,参会华人学者的意见具有一定的代表性.本文介绍了10个类别的类泛素蛋白的中文命名,系统总结了它们的结构特点,并比较了参与各种类泛素化修饰的酶和它们的生物学功能.文章由45名从事该领域研究的专家合作撰写,其中包括中国工程院院士1名,相关学者4名,长江学者3名,国家杰出青年科学基金获得者18名和美国知名高校华人教授4名.他们绝大多数是参加编写即将由科学出版社出版的专著《泛素家族介导的蛋白质降解和细胞自噬》的专家

    Tobacco Advertisements in Mannichi, a Japanese Newspaper in the "ManchuKuo" era

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    本稿では近代満州における煙草市場の実態分析の一環として日系新聞の『満日』(マイクロフィルム)に注目し,そこに掲載された広告の内容を分析することにより煙草企業の市場販売戦略を明らかにすることを目的とする。分析にあたり,多国籍企業の英米煙草会社と日本資本の東亜煙草会社・満州煙草株式会社との広告を抽出し,広告における文字情報と図像情報から成る広告要素と広告手法に着目する。なお,史料とした『満日』は南満州鉄道株式会社が発行した『満州日日新聞』と『満州日報』との通称で,1907年に創刊され,1944年までに発行しつづけたものである。結論としては,まず,満州国期に数多くの煙草広告が掲載されたことが挙げられる。悉皆的な集計と分析をしないと正確な判断はできないが,全体的な印象としては,英米煙草会社の広告はほかのメーカーに比較すると,はるかに多いようである。これは巨大な資本力に負うことと考えられる。そして,英米煙草会社は広告にさまざまな手法を用いたりして単一銘柄を集中に広告するほか,図柄を変化させて広告効果の向上を図った。また,宣伝文のないシンプルな広告が多用され,視覚効果に訴えていた。次に,日本資本の煙草企業が新聞広告を活用していた実態が明らかになった。東亜煙草会社は早い時期から新聞に広告を出したが,掲載頻度がそれほど高くなかった。そして,日中戦争勃発前に掲載した広告はまだ普通の商品広告で,製品品質の良さや包装の美しさなどの点をアピールする余裕があったようであるが,日中戦争勃発後,戦争の相乗結果もあって消費者の愛国心を利用して国貨購入を呼びかける広告手法はその広告の基本路線となった。一方,国策会社として設立された満州煙草株式会社の広告は戦争の勃発・拡大を背景として誕生したもので,戦時宣伝や戦争支援の意味合いが見え,イデオロギーの宣伝陣地となっていた
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