检索结果-南通市图书馆

Study of the Biological Quality of the Water in the Manantali Dam Reservoir: Analysis of the Fish Fauna and Plankton Communities

引用

Journal of Agricultural Chemistry and Environment 2024年第1期13卷 100-114页

作者： Joseph Mbeur Faye saïdou Ndao Louis Eugène Victor sambou Laboratory of Water and Environment Sciences and Technologies (LaSTEE) Polytechnic School of Thies (EPT) Thies Senegal UFR Sciences et Technologies (SET) University Iba Der Thiam of Thies (UIDT) Thies Senegal

The aim of this study of the Manantali dam reservoir is to investigate the biological quality of the water through inventories and analysis of the ichthyofauna and planktonic communities (zooplankton and phytoplankton). Inventories of ichthyofauna and plankton communities were carried out quarterly from 2003 to 2022. The fish populations studied on the basis of bioindicators (species richness, diversity index, equitability index, diversification index) identified 29 species belonging to 10 families. The Cichlidae family is the most represented, while the Schilbeidae and Tetraodontioae families are less represented in terms of number of species. The species Hydrocynus forskalii and Brycinus nurse with relative abundances of 40.12% and 21.4% respectively, both from the family Alestidae, are the most abundant. The species H. forskalii has a frequency of occurrence of 100%. The specific diversity index of 2.9 and the equitability index of 0.6 show an average diversity of fish species. The diversification index of 2.9 indicates a theoretical number of habitats of 2 to 3. The planktonic community is made up of zooplankton and phytoplankton. The inventory of zooplankton shows the presence of 28 zooplankton species belonging to 9 families of the three zooplankton groups Rotifera, Cladocera and Copepoda. Analysis of the frequencies of occurrence of the various taxa showed that the characteristic species of Lake Manantali are the omnipresent rotifers Keratella cochlearis, Keratella quadrata and Trichocerca chattoni. For phytoplankton, the inventories carried out show the presence of 65 species belonging to 5 families (Chlorophycees, Diatomees, Dinophycees, Chrysophycees and Cyanophycees). An analysis of the frequency of occurrence of the various taxa shows that the characteristic species of Lake Manantali are Chlorophycees, with 7 species: Desmidium baileyi, Micrasterias alata, Sphaerocystis schroeteri, Spondylosium sp., Staurastrum heimii, Staurastrum subanchora, Staurodesmu

关键词： Inventory Fish Zooplankton Phytoplankton Diversity Manantali

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

日语授受表达“Vてあげる”“Vてさしあげる”的情境化研究——以日语教材中的例句为中心

引用

西北成人教育学院学报 2024年第3期 64-69页

作者：李飒黄忠东北师范大学外国语学院吉林长春130024 河北工业大学廊坊分校河北廊坊065000

本研究聚焦于日语教学中“Vてあげる”和“Vてさしあげる”的实际运用问题,通过对日语教材中例句的具体情境分析,揭示了教材提供的例句过于抽象,缺乏真实交流场景下的应用练习等问题。研究表明,为提高学习者的实际运用能力,教材设计应... 详细信息

本研究聚焦于日语教学中“Vてあげる”和“Vてさしあげる”的实际运用问题,通过对日语教材中例句的具体情境分析,揭示了教材提供的例句过于抽象,缺乏真实交流场景下的应用练习等问题。研究表明,为提高学习者的实际运用能力,教材设计应更多考虑语言使用的实际场景,教师在教学过程中也应引导学生理解并模仿合适的情境中的语法运用。这一发现对于日语教材编写和教学方法的改进提供了重要参考,有助于提升学习者的交际能力。

关键词：日语授受表达 Vてあげる Vてさしあげる情境化日语教材

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparative Chemical Research in Essential Oils from Six Apiaceae Species Growing in the Northern Region of Vietnam

引用

Phyton-International Journal of Experimental Botany 2024年第7期93卷 1677-1687页

作者： Nguyen Quang Hung Nguyen Thanh Tung Nguyen Phuong hanh Chu Thi Thu ha Nguyen Thi Nhung Nguyen Thai An Vu Xuan Giang Luong Van hao Oleh Koshovyi Ain Raal Institute of Ecology and Biological Resources Vietnam Academy of Science and Technology(VAST)Cau GiayHa Noi100000Viet Nam Graduate University of Science and Technology Vietnam Academy of Science and Technology(VAST)Cau GiayHa Noi100000Viet Nam Department of Pharmacognosy Faculty of Pharmacognosy and Traditional MedicineHanoi University of PharmacyHoan KiemHa Noi100000Viet Nam sa Pa Research Center of Medicinal Materials National Institute of Medicinal MaterialsDien Bien PhuSa PaLao Cai330000Viet Nam Institute of Pharmacy Faculty of MedicineUniversity of TartuTartu50411Estonia

Our study aimed to compare the essential oil(EO)concentration and composition of several Apiaceae species growing in the Northern region of *** yields of EOs from materials ranged from 0.03%(root EO of Angelica acutiloba and aerial parts EO of Heracleum bivittatum)-0.27%(leaf EO of Xyloselinum vietnamense).Gas chromatography-mass spectrometry(GC-MS)allowed the identiﬁcation of 74 components in the EOs of six Apiaceae species,making up 94.4%–100.0%of the *** EO from Angelica acutiloba,(Z)-ligustilide accounted for an extremely large proportion(94.9%).EO of Angelica pubescens was dominated by six character-istic components includingα-pinene(21.5%),β-phellandrene(18.1%),p-cymene(12.2%),3-methylnonane(8.7%),o-cymene(8.1%),and D-sylvestrene(6.2%).The EO from Cryptotaenia japonica was characterized by high amounts ofα-selinene(48.7%),β-selinene(23.7%),and trans-β-farnesene(5.4%).The EOs from leaves and stems of Xyloselinum vietnamense were characterized by high concentrations of sabinene(69.8%and 33.8%),4-terpineol(8.7%and 7.4%)andβ-pinene(4.0%and 6.5%)while EOs from aerial parts and root of Xylo-selinum leonidii comprise four characteristic monoterpenes includingα-pinene(28.2%and 52.8%),β-pinene(7.9%and 10.3%),β-phellandrene(7.6%and 15.3%),and sabinene(3.0%and 4.1%).Additionally,cryptone is also one of the major components in the EO of Xyloselinum leonidii(13.2%in the aerial parts oil and 2.8%in the root oil).In the EOs isolated from the aerial parts and root of Heracleum bivittatum,α-pinene(22.5%and 70.2%)andβ-pinene(43.2%and 20.0%)were the predominant *** appeared in the EO from aerial parts of Heracleum bivittatum with a relatively high concentration(13.5%)while bornyl acetate(5.1%)was also one of the main components in the EO from its aerial parts but was not detected in other Apiaceae species in the present *** databases help identify and control the quality of plant material studied from the family Apiaceae growing in Vietnam.

关键词： Apiaceae essential oil terpenoids gaschromatography-mass spectrometry

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

海上丝路与中国天文历法在日本的传播及影响研究

引用

自然辩证法通讯 2024年第4期46卷 57-65页

作者：萨日娜上海交通大学科学史与科学文化研究院上海200240

经过海上丝路有大量汉文科学典籍传入日本并产生了重要的影响,天文历法知识是其中重要的一个方面。文中通过史料调查和实证考察,探索了魏晋南北朝时期,中国天文知识传日背景;研究隋唐时期,随着海上丝路的发展,日本留学生(僧)把中国天文... 详细信息

经过海上丝路有大量汉文科学典籍传入日本并产生了重要的影响,天文历法知识是其中重要的一个方面。文中通过史料调查和实证考察,探索了魏晋南北朝时期,中国天文知识传日背景;研究隋唐时期,随着海上丝路的发展,日本留学生(僧)把中国天文知识传至日本的详情,尤其考察了唐历《宣明历》在日本使用八百多年之久的缘由;继而分析了宋元明时期,中国传统天文历法持续传日,并对其传统学术建构产生的深远影响。结论认为研究中日传统天文历法的关联性,不仅有助于认识海上丝路文明对日本传统科技的影响,对提升中华传统文化的国际传播力和影响力也有一定的借鉴意义。

关键词：海上丝路天文历法传统科技中日交流

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

空间、形象与信息——戏曲与歌剧舞美的类型比较与借鉴

引用

四川戏剧 2024年第8期 56-60页

作者：金卅中国戏曲学院舞台美术系

现代戏曲在西式歌剧的镜框舞台轮番演出,超脱传统戏台的舞台空间、观演关系以及戏曲本体,现代化所带来的关于内容表现与题材、审美价值与取向的变化都给戏曲舞美的发展带来新的机遇与挑战。本文试图将发生在镜框舞台内的戏曲与歌剧进行... 详细信息

现代戏曲在西式歌剧的镜框舞台轮番演出,超脱传统戏台的舞台空间、观演关系以及戏曲本体,现代化所带来的关于内容表现与题材、审美价值与取向的变化都给戏曲舞美的发展带来新的机遇与挑战。本文试图将发生在镜框舞台内的戏曲与歌剧进行一种类型的比较与分析,从空间的建立、形象的创造、信息的传递三个方面探讨适合当下戏曲表演空间的舞美新方式。

关键词：戏曲舞美舞台空间舞台形象视觉信息

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Factors Associated with HPV Vaccine Uptake among Girls Aged 9 - 14 in the Langue de Barbarie Area of saint-Louis, Senegal in 2024

引用

Journal of Immune Based Therapies, Vaccines and Antimicrobials 2024年第1期13卷 1-15页

作者： Papa Djibril Ndoye Lebem Togtoga Abdourahmane Ndong Mamadou saïdou Bah Khadim Niang Departement of Public Health and Social Medicine UFR of Health Science Gaston Berger University Saint-Louis Senegal ENDA sant Dakar Senegal

Introduction: The HPV vaccine was included in the Expanded Programme on Immunisation in Senegal in 2018. However, vaccination coverage is still low among targeted girls. The aim of this research was to study the factors associated with vaccine uptake among girls aged 9 - 14 years in the Langue de Barbarie area of saint-Louis, Senegal. Methodology: This was a descriptive and analytical cross-sectional study. The sample size was calculated using the Schwartz formula and distributed proportionally to the size of the population in the neighborhoods. Data were collected from 2nd to 19th January 2024 from mothers or guardians of girls aged 9 to 14 using anonymous questionnaires configured on tablets with Survey 123 software and analysed using R software. Results: A total of 799 people were interviewed. The average age of the respondents was 35.67 years, with a standard deviation of 7.08 and a range of 17 and 49 years. Reported vaccination coverage was 41.9%. Factors positively correlated with vaccination included: attendance at primary school or daara (OR = 2.50 [CI: 1.43 - 4.48] and OR = 2.05 [CI: 1.09 - 3.94]), information about vaccination (OR = 6.64 [CI: 4.59 - 9.72]), history of cervical cancer screening among mothers or guardians (OR = 6.64 [CI: 4.59 - 9.72]). Conclusion: Identifying the factors associated with HPV vaccination is necessary to assess and improve the vaccination strategy in order to improve vaccination coverage among targeted girls.

关键词： Cervical Cancer Vaccine HPV Girls Risk Senegal

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study on the Knowledge of Mothers or Guardians of Girls Aged 9 - 14 from the Langue de Barbarie in saint-Louis, Senegal about Cervical Cancer and Its Relationship to HPV Vaccination in 2024

引用

Journal of Immune Based Therapies, Vaccines and Antimicrobials 2024年第2期13卷 17-31页

Introduction: The relationship between knowledge of HPV and vaccination has been established. The aim of this study was to investigate the knowledge of mothers or guardians of girls aged 9 - 14 about cervical cancer and their attitudes to HPV vaccination. Methodology: This was a descriptive cross-sectional survey. The sample size was calculated using the Schwartz formula and distributed proportionally to the size of the neighbourhood population. Data was collected between 2nd to 19th January 2024 using anonymous questionnaires configured on tablets with Survey 123 software and analysed using R software. Results: A total of 799 people were interviewed. The average age of the respondents was 35.67 years, with a standard deviation of 7.08 and a range of 17 and 49 years. The information channels for cervical cancer were the media (82.8%), health facilities (47.7%) and community intermediaries (23.3%). Only 53.7% had information about the vaccine and 25.5% about the vaccination strategy. The main reason for accepting the vaccine was awareness of the seriousness of cervical cancer (55.1%). Conclusion: It is essential to take stock of knowledge about cervical cancer and attitudes to vaccination to assess the impact of interventions and redirect strategies to improve vaccination coverage. .

关键词： Cervical Cancer HPV Vaccine Knowledge Girls Senegal

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

激光散射特性的红外瞄准镜基线检测方法

引用

激光杂志 2024年第7期45卷 227-232页

作者：李波莎日娜内蒙古医科大学呼和浩特010110 中国人民解放军32302部队50分队北京101400

为提升武器射击精度,设计激光散射特性的红外瞄准镜基线检测方法。通过固定瞄准镜并利用黑体发射红外激光,在镜子反射后形成红外平行光束,并在瞄准镜视场内生成靶标的像。通过调整瞄准镜分划中心与靶标像中心重合,实现基线检测。采用双... 详细信息

为提升武器射击精度,设计激光散射特性的红外瞄准镜基线检测方法。通过固定瞄准镜并利用黑体发射红外激光,在镜子反射后形成红外平行光束,并在瞄准镜视场内生成靶标的像。通过调整瞄准镜分划中心与靶标像中心重合,实现基线检测。采用双向反射分布函数和基尔霍夫近似理论的驻留相位近似法,分析红外激光的散射特性及波长与散射角对成像精度的影响,从而提高基线检测的精度。实验证明:当入射波长在9.5μm左右时,射击目标粗糙度为8μm时,双站极化散射系数最低,在1.0左右;当散射角在29°左右时,射击目标粗糙度为8μm时,双站极化散射系数最低在0.146左右;校正后目标位置偏差平均为0.01 m。

关键词：激光散射特性红外瞄准镜基线检测反射分布函数基尔霍夫驻留相位近似法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The effect of reactive plasticizer on viscoelastic and mechanical properties of solid rocket propellants based on different types of HTPB resin

引用

Defence Technology（防务技术） 2024年第3期33卷 66-77页

作者： Tihomir Kovacevic Slavko Mijatov Jelena Grzetic Suzana Cakic Bojana Fidanovski sasa Brzic Military Technical Institute Ministry of DefenceRatka Resanovica 1BelgradeSerbia Faculty of Technology University of NisBulevar osloboCenja 124LeskovacSerbia

Conventional plasticizers deteriorate mechanical and viscoelastic properties of the propellants due to their migration upon aging and long-term storage,which affects reliability and safety properties during *** address this issue,conventional plasticizer,dioctyl adipate(DOA),is replaced by reactive one,castor oil(CO).In addition,three different types of HTPB were used to obtain propellants with designed viscoelastic and mechanical *** CO increased propellants viscosity,without a significant impact on the propellant processability,regardless to the type of ***,mechanical properties were different depending on the type of resin,which were further analyzed by gel permeation chromatography(GPC).Addition of CO formed a denser polymer network and shifted T_(g) to higher values,compared to the compositions with *** tensile strength of CO-containing propellants was lower at +20℃ and +50℃ compared to the reference compositions,while the strain at maximum load and strain at break were significantly increased with pronounced plastic deformation,especially for samples at -30℃.The inclusion of CO in the propellants composition gives more room for adjusting a wide range of mechanical properties.

关键词： HTPB-based composite propellants Castor oil Reactive plasticizer Gel permeation chromatography Sol-gel analysis Mechanical and viscoelastic properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Development of a new Cox model for predicting long-term survival in hepatitis cirrhosis patients underwent transjugular intrahepatic portosystemic shunts

引用

World Journal of Gastrointestinal Surgery 2024年第2期16卷 491-502页

作者： Yi-Fan Lv Bing Zhu Ming-Ming Meng Yi-Fan Wu Cheng-Bin Dong Yu Zhang Bo-Wen Liu Shao-Li You sa Lv Yong-Ping Yang Fu-Quan Liu Liver Disease Minimally Invasive Diagnosis and Treatment Center Beijing Shijitan HospitalCapital Medical UniversityBeijing 100038China Liver Vascular Disease Diagnosis and Treatment Center The Fifth Medical Center of Chinese People's Liberation Army General HospitalBeijing 100039China

BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)placement is a procedure that can effectively treat complications of portal hypertension,such as variceal bleeding and refractory ***,there have been no specific studies on predicting long-term survival after TIPS *** To establish a model to predict long-term survival in patients with hepatitis cirrhosis after *** A retrospective analysis was conducted on a cohort of 224 patients who un-derwent TIPS *** univariate and multivariate Cox regression analyses,various factors were examined for their ability to predict survival at 6 years after ***,a composite score was formulated,encompassing the indication,shunt reasonability,portal venous pressure gradient(PPG)after TIPS,percentage decrease in portal venous pressure(PVP),indocyanine green retention rate at 15 min(ICGR15)and total bilirubin(Tbil)***,the performance of the newly developed Cox(NDC)model was evaluated in an in-ternal validation cohort and compared with that of a series of existing *** The indication(variceal bleeding or ascites),shunt reasonability(reasonable or unreasonable),ICGR15,post-operative PPG,percentage of PVP decrease and Tbil were found to be independent factors affecting long-term survival after TIPS *** NDC model incorporated these parameters and successfully identified patients at high risk,exhibiting a notably elevated mortality rate following the TIPS procedure,as observed in both the training and validation ***,in terms of predicting the long-term survival rate,the performance of the NDC model was significantly better than that of the other four models[Child-Pugh,model for end-stage liver disease(MELD),MELD-sodium and the Freiburg index of post-TIPS survival].CONCLUSION The NDC model can accurately predict long-term survival after the TIPS procedure in patients with hepatitis cirrhosis,help identify high-risk patients

关键词： Transjugular intrahepatic portosystemic shunt Long-term survival Predictive model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：