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Evaluation of the Inhibitory Gel Aloe vera against Corrosion of Reinforcement Concrete in NaCl Medium

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Materials Sciences and Applications 2024年第5期15卷 101-112页

作者： Malang Bodian Dame Keinde Kinda Hannawi Modou Fall Aveline Darquennes Prince william Agbodjan Laboratoire de Chimie Physique Organique et d’ Analyse Environnementales (LCPOAE) D&#233partement de Chimie Universit&#233 Cheikh Anta Diop de Dakar Dakar Senegal Laboratoire de Gé nie Civil et G&#233nie M&#233canique (LGCGM) INSA Rennes Universit&#233 de Rennes Rennes France Civil Engineering Materials Laboratory (LMGC) Ecole Sup&#233rieure Polytechnique de Dakar (Senegal) Universit&#233 Cheikh Anta Diop Dakar S&#233n&#233gal

Most reinforced concrete structures in seaside locations suffer from corrosion damage to the reinforcement, limiting their durability and necessitating costly repairs. To improve their performance and durability, we have investigated in this paper Aloe vera extracts as a green corrosion inhibitor for reinforcing steel in NaCl environments. Using electrochemical methods (zero-intensity chronopotentiometry, Tafel lines and electrochemical impedance spectroscopy), this experimental work investigated the effect of these Aloe vera (AV) extracts on corrosion inhibition of concrete reinforcing bar (HA, diameter 12mm) immersed in a 0.5M NaCl solution. The results show that Aloe vera extracts have an average corrosion-inhibiting efficacy of around 86% at an optimum concentration of 20%.

关键词： Reinforced Concrete Green Inhibitor Corrosion Reinforcement Electrochemical Methods

Electrochemical Study of the Corrosion Inhibitory Capacity of Calcined Attapulgite in Reinforced Concrete Medium

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Advances in Materials Physics and Chemistry 2024年第5期14卷 76-94页

作者： Malang Bodian Kinda Hannawi Dame Keinde Modou Fall Aveline Darquennes Prince william Agbodjan Faculté des Sciences et Techniques D&#233partement de Chimie Universit&#233 Cheikh Anta Diop de Dakar (S&#233n&#233gal) Laboratoire de Chimie Physique Organique et d&#8217Analyse Environnementales (LCPOAE) Dakar Senegal Dé partement de G&#233nie Civil Universit&#233 de Rennes INSA Rennes Laboratoire de G&#233nie Civil et G&#233nie M&#233canique (LGCGM) Rennes France Dé partement de G&#233nie Civil Universit&#233 Cheikh Anta Diop Ecole Sup&#233rieure Polytechnique de Dakar (S&#233n&#233gal) Laboratoire de Mat&#233riaux de G&#233nie Civil (LMGC) Dakar Senegal

The durability of reinforced concrete structures is greatly influenced by the corrosion of the reinforcement. In addition to air pollution related to the repair of corroded structures, chloride ions are the main factors of corrosion of reinforced concrete structures. This study aims to valorize a clay inhibitor against reinforcement corrosion in reinforced concrete. This clay (Attapulgite) was incorporated into reinforced concretes at different percentages of substitution of calcined attapulgite (0%, 5% and 10%) to cement in the formulation. The corrosion inhibitory power of attapulgite is evaluated in reinforced concretes subjected to the action of chloride ions at different intervals in the NaCl solution (1 day, 21 days and 45 days) by electrochemical methods (zero current chronopotentiometry, polarization curves and electrochemical impedance spectroscopy). This study showed that in the presence of chloride ions, the composition based on 10% attapulgite has an appreciable inhibitory effect with an average inhibitory efficiency of 82%.

关键词： Attapulgite Electrochemical Methods Inhibitor Reinforced Concrete

Pregnancy recognition signaling mechanisms in ruminants and pigs

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Journal of Animal Science and Biotechnology 2013年第3期4卷 170-179页

作者： fuller W Bazer Department of Animal Science Texas A&M University College Station 442D Kleberg Center2471 TAMU Texas 77843-2471 USA

Maternal recognition of pregnancy refers to the requirement for the conceptus（embryo and its associated extraembryonic membranes） to produce a hormone that acts on the uterus and/or corpus luteum（CL） to ensure maintenance of a functional CL for production of progesterone;the hormone required for pregnancy in most *** pregnancy recognition signal in primates is chorionic gonadotrophin which acts directly on the CL via luteinizing hormone receptors to ensure maintenance of functional CL during *** ruminants,interferon tau（IFNT） is the pregnancy recognition *** is secreted during the peri-implantation period of pregnancy and acts on uterine epithelia to silence expression of estrogen receptor alpha and oxytocin receptor which abrogates the oxytocin-dependent release of luteolytic pulses of prostaglandin F2-alpha（PGF） by uterine epithelia;therefore,the CL continues to produce progesterone required for *** conceptuses secrete interferon delta and interferon gamma during the peri-implantation period of pregnancy,but there is no evidence that they are involved in pregnancy recognition ***,pig conceptuses secrete abundant amounts of estrogens between Days 11 to 15 of pregnancy required for maternal recognition of ***,likely in concert with prolactin,prevents secretion of PGF into the uterine venous drainage（endocrine secretion）,but maintains secretion of PGF into the uterine lumen（exocrine secretion） where it is metabolized to a form that is not *** PGF is sequestered within the uterine lumen and unavailable to induce luteolysis,functional CL are maintained for production of *** addition to effects of chorionic gonadotrophin,IFNT and estrogens to signal pregnancy recognition,these hormones act on uterine epithelia to enhance expression of genes critical for growth and development of the conceptus.

关键词： Pregnancy Interferon Tau Estrogen Prostaglandin F2α

Massive Epistaxis Revealing a Post-Traumatic Aneurysm of the Internal Carotid Artery: A Clinical Case and Review of the Literature

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International Journal of Otolaryngology and Head & Neck Surgery 2024年第2期13卷 120-125页

作者： Yannick Mossus Maguy Mbede roger Meva’a Biouélé Leonel Atanga Adèle-Rose Ngo Nyeki Pierre Ongolo Zogo François Djomou Alexis Ndjolo Department of Ophthalmology ENT and Stomatology Faculty of Medicine and Biomedical Sciences University of Yaoundé 1 Yaoundé Cameroon Department of Medical Imaging Faculty of Medicine and Biomedical Sciences University of Yaoundé 1 Yaoundé Cameroon

Internal carotid artery (ICA) aneurysms are an unusual but serious cause of epistaxis. This epistaxis is massive and sometimes uncontrollable threatening the vital prognosis of patients. We report the case of a 16-year-old adolescent received in emergency with severe bilateral epistaxis, asthenia and grade-3 left exophthalmos. In his history, the subject had been the victim of an assault six months before consultation. He had received blows on the cephalic extremity with light but repeated epistaxis. The treatment consisted to blood products transfusion and local compression by sterile gazes. An ICA aneurysm in sphenoid sinus has been confirmed in a craniofacial CT scan coupled to vascular opacification. Although the ICA has a variable course in contact with the sphenoid sinus, massive epistaxis would be the consequence of a pronounced dehiscence of the ICA in the sphenoid sinus, particularly in a traumatic context. In front of this type of epistaxis in our context, general practitioners must be able to suspect a ruptured ICA aneurysm in the presence of exophthalmos and a notion of old or recent cranio-encephalic injury. Additionally, due to the high morbidity and mortality of this condition, a monitoring algorithm is necessary for patients with head trauma to facilitate early detection.

关键词： Aneurysm Internal Carotid Artery Head Trauma Epistaxis

约4900年前东亚和东南亚枢纽地区狩猎采集向农业的转变

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Science Bulletin 2024年第1期69卷 103-113页

作者：马敏敏卢敏霞孙瑞朱忠华 Dorian Q.fuller 郭健新何光林杨晓敏谭玲玲芦永秀董佳佳刘睿良杨继帅李波郭天南李小瑞赵东月张颖王传超董广辉 Key Laboratory of Western China’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Zhaotong University Zhaotong 657000China Westlake Laboratory of Life Sciences and Biomedicine Key Laboratory of Structural Biology of Zhejiang ProvinceSchool of Life SciencesWestlake UniversityHangzhou 310024China Institute of Basic Medical Sciences Westlake Institute for Advanced StudyHangzhou 310024China Yunnan Provincial Institute of Cultural Relics and Archaeology Kunming 650118China Institute of Archaeology University College LondonLondon WC1H 0PYUK School of Cultural Heritage Northwest UniversityXi’an 710069China State Key Laboratory of Cellular Stress Biology School of Life SciencesXiamen UniversityXiamen 361102China Department of Anthropology and Ethnology Institute of AnthropologySchool of Sociology and AnthropologyXiamen UniversityXiamen 361005China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China Westlake Omics(Hangzhou)Biotechnology Co. Ltd.Hangzhou 310024China The Department of Asia British MuseumLondon WC1E 7JWUK Tonghai Cultural Relics Management Yuxi 652700China Group of Alpine Paleoecology and Human Adaptation Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentBeijing 100101China Ministry of Education Key Laboratory of Contemporary Anthropology Department of Anthropology and Human GeneticsSchool of Life SciencesFudan UniversityShanghai 200433China

The southward expansion of East Asian farmers profoundly influenced the social evolution of Southeast Asia by introducing cereal ***,the timing and routes of cereal expansion in key regions are unclear due to limited empirical *** we report macrofossil,microfossil,multiple isotopic(C/N/Sr/O)and paleoproteomic data directly from radiocarbon-dated human samples,which were unearthed from a site in Xingyi in central Yunnan and which date between 7000 and 3300 a *** isotopes reveal the earliest arrival of millet ca.4900 a BP,and greater reliance on plant and animal agriculture was indicated between 3800 and 3300 a *** dietary differences between hunter-gatherer and agricultural groups are also evident in the metabolic and immune system proteins analysed from their skeletal *** results of paleoproteomic analysis indicate that humans had divergent biological adaptations,with and without *** combined application of isotopes,archaeobotanical data and proteomics provides a new approach to documenting dietary and health changes across major subsistence transitions.

关键词： Isotopes Proteomics Yunnan Millet Agricultural origins Human health

Progress of International Meridian Circle Program

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空间科学学报 2024年第4期44卷 741-745页

作者： WANG Chi BLANC Michel ZHANG Shunrong DENARDINI Clezio Marcos LIU william SHEN Xuhui WU Jian XU Jiyao LI Hui ZHANG Qinghe REN Liwen ZHU Yajun LI Guozhu DING Zonghua LIU Zhengkuan YANG Fang National Space Science Center Chinese Academy of SciencesBeijing 100190 IRAP(CNRS-University Toulouse III-CNES) Toulouse 31400 Haystack Observatory Massachusetts Institute of TechnologyMA 01886 Instituto Nacional de Pesquisas Espaciais São Josédos Campos(SP)Brazil 12227-010 China Research Institute of Radio wave Propagation Qingdao 266000 Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100083

In 2024,the Chinese Meridian Project(CMP)completed its construction,deploying 282 instruments across 31 *** achievement not only provides a robust foundation but also serves as a reference template for the International Meridian Circle Program(IMCP).The IMCP aims to integrate and establish a comprehensive network of ground-based monitoring stations designed to track the propagation of space weather events from the Sun to ***,it monitors various disturbances generated within the Earth system that impact *** the past two years,significant progress has been made on the *** particular,the second phase of construction for the China-Brazil Joint Laboratory for Space Weather has been completed,and the North Pole and Southeast Asia networks are under active *** 2024 IMCP joint observation campaign was successfully *** facilitate these developments,the scientific program committee of IMCP was established,following the success of 2023 IMCP workshop and the space weather school,which was co-hosted with the Asia-Pacific Space Cooperation Organization(APSCO)and sponsored by Chinese Academy of Sciences(CAS)and Scientific Committee on Solar-Terrestrial Physics(SCOSTEP).Preparations are now underway for the 2024 workshop in collaboration with the National Institute for Space Research(INPE)in Brazil.

关键词： Chinese Meridian Project(CMP) International Meridian Circle Program(IMCP) China-Brazil Joint Laboratory for Space Weather North Pole and Southeast Asia networks

Agriculture green development in China: insights and advances

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Frontiers of Agricultural Science and Engineering 2024年第1期11卷 5-19,I0005页

作者： Jianbo SHEN Qichao ZHU Yong HOU Wen-Feng CONG Wen XU Jiuliang XU Zhichao AN Xiaoqiang JIAO Kai ZHANG Tianxiang YU Lin MA Oene OENEMA william J.DAVIES Fusuo ZHANG State Key Laboratory of Nutrient Use and Management College of Resources and Environmental SciencesNational Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijing 100193China Key Laboratory of Agricultural Water Resources Center for Agricultural Resources ResearchInstitute of Genetic and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China Wageningen Environmental Research Wageningen University&ResearchWageningen6700 AAthe Netherlands Lancaster Environment Centre University of LancasterLancasterLA14YQUK

Reconciling the tasks of producing adequate amounts of nutritious food for the increasing global population while preserving the environment and natural ecosystems simultaneously is an enormous challenge. The concept of agriculture green development(AGD) and the necessary governmental policies were developed to address the aforementioned challenge in China and to help achieve the related global sustainable development goals. Agriculture green development emphasizes the synergy between green and development;current agriculture has to transform from the intensive farming with high inputs, high environmental impacts and low resource-use efficiency to a more sustainable agriculture, in order to ensure an adequate supply of nutritious food while delivering environmental integrity, improved economic profitability,and social equity. A research program on AGD was established by China Agricultural University with four research themes, namely: green crop production, green integrated crop-animal production, green food and industry,and green ecological environment and ecosystem services, to provide a scientific basis for future developments and to facilitate the implementation of AGD in practice. AGD requires a multistakeholder approach, fueled by innovative and interdisciplinary research. Joint actions have to be taken by governments, farmers, supply industries, consumers, educators, extension services and researchers to support AGD. This requires strong coordination and public awareness campaigns. This review presents the progress that has been made over the past 5 years and makes recommendations for more research and development, in order to better deliver agricultural green and sustainable development on national and international scales.

关键词： Agriculture ecosystem services environmental protection food security green development multi-sectoral cooperation sustainable development

A cross-sectional study of breastfed infants referred for tongue tie assessment and frenotomy in one Canadian health region

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Pediatric Investigation 2024年第1期8卷 53-60页

作者： Tiffany A.Lee Jessica Bishop Anne Drover william K.Midodzi Laurie K.Twells School of Pharmacy Memorial University of Newfoundland(MUN)St.John’sCanada Faculty of Medicine Memorial University of Newfoundland(MUN)St.John’sCanada

Importance:Tongue tie(TT)is a condition that can cause infant feeding difficulties due to restricted tongue *** TT presents as a significant barrier to breastfeeding,a frenotomy may be *** accepted diagnostic criteria for TT are lacking and wide prevalence estimates are *** referral processes and a Frenotomy Assessment Tool were implemented in one Canadian health region to connect breastfeeding dyads with a provider for TT evaluation and ***:To determine the proportion of babies with TT as well as the frequency of ***:This cross-sectional study included infants who initiated breastfeeding at birth and were referred for TT evaluation over a 14-month *** were collected retrospectively by chart review and analyzed using *** associated with frenotomy were examined using logistic ***:Two hundred and forty-one babies were ***-two percent(n=222)were diagnosed with TT and 66.0%(n=159)underwent *** the multivariate model,nipple pain/trauma,inability to latch,inability to elevate tongue,and dimpling of tongue on extension were associated with frenotomy(P<0.05).Most referrals in our region resulted in a diagnosis of TT;however,the number of referrals was lower than expected,and of these two-thirds underwent ***:TT is a relatively common finding among breastfed *** research should examine whether a simplified assessment tool containing the four items associated with frenotomy in our multivariate model can identify breastfed infants with TT who require frenotomy.

关键词： Breastfeeding Nutrition Community health services Pediatrics

A New Infrared Atmospheric Sounding Interferometer Channel Selection and Assessment of Its Impact on Met Office NWP Forecasts

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Advances in Atmospheric Sciences 2017年第11期34卷 1265-1281页

作者： Young-Chan NOH Byung-Ju SOHN. Yoonjae KIM Sangwon JOO william BELL roger SAUNDERS School of Earth and Environmental Sciences Seoul National University Seou108826 Korea Numerical Modeling Center Korea Meteorological Administration Seou107062 Korea Met Office Exeter EXI 3PB United Kingdom

A new set of Infrared Atmospheric Sounding Interferometer （IASI） channels was re-selected from 314 EUMETSAT channels. In selecting channels, we calculated the impact of the individually added channel on the improvement in the analysis outputs from a one-dimensional variational analysis （1D-Var） for the Unified Model （UM） data assimilation system at the Met Office, using the channel score index （CSI） as a figure of merit. Then, 200 channels were selected in order by counting each individual channel＇s CSI contribution. Compared with the operationally used 183 channels for the UM at the Met Office, the new set shares 149 channels, while the other 51 channels are new. Also examined is the selection from the entropy reduction method with the same 1D-Var approach, Results suggest that channel selection can be made in a more objective fashion using the proposed CSI method. This is because the most important channels can be selected across the whole IASI observation spectrum. In the experimental trial runs using the UM global assimilation system, the new channels had an overall neutral impact in terms of improvement in forecasts, as compared with results from the operational channels. However, upper-tropospheric moist biases shown in the control run with operational channels were significantly reduced in the experimental trial with the newly selected channels. The reduction of moist biases was mainly due to the additional water vapor channels, which are sensitive to the upper-tropospheric water vapor.

关键词： Hyperspectral IR sounding channel selection 1D-Vat data assimilation