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Risk Factors for Geo-Helminthiasis in Children Aged 6 - 36 Months in a Rural Health District in Cameroon
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作者 Isabelle Mekone Nkwele Monono Naiza +6 位作者 Gervais Talla Kamga Hugues Nana Djeunga Jeannette Epée Ngoue Patricia Epée Eboumbou Suzanne Ngo Um Sap Evelyn Mah Mungeh Joseph Kamgno 《Open Journal of Pediatrics》 2024年第2期391-400,共10页
Introduction and Objectives: Soil-Transmitted-Helminthiasis (STH) is a public health problem in Cameroon. The control strategies currently in place, particularly chemoprevention, has shortcomings linked to the target ... Introduction and Objectives: Soil-Transmitted-Helminthiasis (STH) is a public health problem in Cameroon. The control strategies currently in place, particularly chemoprevention, has shortcomings linked to the target population, which are school-age children. The objective was to determine the prevalence and the risk factors associated with geo-helminthiasis in children aged 0 to 3 years in a rural health district. Method: From December 2020 to May 2021, a descriptive and analytical cross-sectional study of 376 children between 6 and 36 months was carried out in the Akonolinga health district. This was a cluster sampling in 4 health areas. Stool samples were collected and analysed using the mini-FLOTAC method. The results expressed as the number of eggs per gram of stool. A questionnaire on socio-demographic and lifestyle data was administered to the parents. The Chi-squared test was used to measure the association between geo-helminth infection and the data collected. A multivariate analysis using logistic regression was performed (p 0.05). Results: The prevalence of STH was 19.4% (Ascaris lumbricoides: 16% and Trichuris trichiura: 8%). Risk factors were: consumption of contaminated water (AOR = 1.93 [1.03 - 3.6];p = 0.040), early contact of the child with the ground (before age of 4 months) (AOR = 4.9 [2.1 - 11.37];p .001), habit of walking barefoot (AOR = 2.91 [1.1 - 7.97];p = 0.038), and living in a habitat with unpaved ground (AOR = 7.4 [1.55 - 35.7];p = 0.012). Conclusion: The prevalence of STHs in infants was high. Preventive chemotherapy should be extended to this age-group, and other measures intensified. 展开更多
关键词 Akonolinga Soil-Transmitted-Helminths Children aged 0 - 3 Years Risk Factors
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Factors Associated with Acute Respiratory Infections in Children Aged 0 - 5 Years in the Yénawa District of Cotonou (Benin) in 2023
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作者 Virginie Mongbo Luc Béhanzin +2 位作者 Lamidhi Salami Nicolas Hamondji Amegan Edgard-Marius Ouendo 《Open Journal of Epidemiology》 2024年第2期331-342,共12页
Introduction: Acute respiratory infections remain one of the main causes of mortality in children aged 0 to 5. This work aimed to study the associated factors with the occurrence of acute respiratory infections in chi... Introduction: Acute respiratory infections remain one of the main causes of mortality in children aged 0 to 5. This work aimed to study the associated factors with the occurrence of acute respiratory infections in children 0 to 5 years old in Yénawa, Cotonou in 2023. Subjects and Method: It was an analytical cross-sectional study of children aged 0 - 5 years and their mothers in Yénawa, selected by four-degree random sampling. The sampling size, calculated using the Schwartz formula, was 126 children and 126 mothers. The dependent variable was the occurrence of acute respiratory infections. The independent variables were classified into four groups: socio-demographic and economic characteristics, behavioral factors, child-related factors, and environmental factors. Data collected by observation and questionnaire survey were analyzed using STATA version 15 software. Associated factors were investigated by bivariate analysis and multiple logistic regression, at the 5% significance level. Results: A total of 126 children aged 0 - 5 years and 126 mothers were surveyed, aged 23.5 (11 - 36) months and 30 (18 - 48) years respectively. The prevalence of acute respiratory infections was 74.60% (CI95% = 66.89 to 82.30). The associated factors were the mother’s age between 18 and 28 (OR = 10.77;CI95% = 1.89 to 61.27;p = 0.007), the use of charcoal/wood for cooking (OR = 7.36;IC = 1.99 to 27.10;p = 0.003)), children's poor personal hygiene (OR = 8.87;IC = 2.92 to 26.97;p 0.001)), and cohabitation with domestic animals (OR = 7.27;IC = 1.67 to 31.71;p = 0.015). Conclusion: Communicating with mothers about the factors identified will help reduce the prevalence of acute respiratory infections in children aged 0 to 5. 展开更多
关键词 Acute Respiratory Infections Children aged 0 - 5 Associated Factors Yénawa BENIN
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对流-扩散方程若干AGE格式及其稳定性 被引量:2
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作者 曾文平 《华侨大学学报(自然科学版)》 CAS 1999年第3期230-236,共7页
以求解对流-扩散方程的中心差分格式、显式逆风格式、Samarski格式和修正Dennis格式为基础,构造了若干新的交替分组显式格式,并证明它们是无条件稳定的.数值结果表明,除了基于中心差分格式的AGE格式与ADE格式... 以求解对流-扩散方程的中心差分格式、显式逆风格式、Samarski格式和修正Dennis格式为基础,构造了若干新的交替分组显式格式,并证明它们是无条件稳定的.数值结果表明,除了基于中心差分格式的AGE格式与ADE格式外,其他的各种AGE格式与相应的ADE格式的精度相当. 展开更多
关键词 对流-扩散方程 显式格式 稳定性 age格式
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热加工食品中晚期糖基化终末产物和5-羟甲基糠醛的形成、检测与控制
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作者 陆胜民 黄子馨 +2 位作者 李小琼 郑美瑜 韩永斌 《浙江农业学报》 CSCD 北大核心 2024年第6期1458-1468,共11页
食品加工过程中的美拉德反应有助于形成一些热诱导毒性产物,包括晚期糖基化终末产物(advanced glycation end products,AGEs)和5-羟甲基糠醛(5-hydroxymethylfurfural,5-HMF)。食源性AGEs在体内的积累和循环与糖尿病并发症的发生有关,... 食品加工过程中的美拉德反应有助于形成一些热诱导毒性产物,包括晚期糖基化终末产物(advanced glycation end products,AGEs)和5-羟甲基糠醛(5-hydroxymethylfurfural,5-HMF)。食源性AGEs在体内的积累和循环与糖尿病并发症的发生有关,同时可能诱发氧化应激、炎症和动脉粥样硬化。5-HMF的代谢物5-磺基氧甲基糠醛(5-sulfooxymethylfurfural,5-SMF)有潜在基因毒性和致癌性。如何控制热加工食品中这些危害物的形成已成为食品行业的关注焦点。本文从美拉德反应和焦糖化反应两条途径探究了AGEs和5-HMF的形成机理,并对近5年二者的检测方法进行了综述,阐述了各类方法的优缺点,以期为建立二者的通用检测方法奠定基础。在此基础上,从削减前体物质的供给、阻断中间体的转化,以及去除已经生成的AGEs和5-HMF这3个方面着手,综述了近年来相应所采用的抑制策略,以期为AGEs和5-HMF在食品中的控制及热加工食品质量与安全管理提供理论依据。 展开更多
关键词 晚期糖基化终末产物(ages) 5-羟甲基糠醛(5-HMF) 形成途径 检测方法 控制措施
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基于视网膜Müller细胞的地黄调节AGEs干预下HIF-1α表达的谱效关系研究 被引量:8
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作者 刘思妍 王芯 +3 位作者 潘奕璇 李艳玲 张梅 谢学军 《中成药》 CAS CSCD 北大核心 2020年第1期217-221,共5页
目的建立不同来源地黄的高效液相色谱(HPLC)指纹图谱并研究其与糖基化终末产物(AGEs)干预下视网膜Müller细胞中低氧诱导因子-1α(HIF-1α)表达之间的谱效关系,初步阐明地黄防治糖尿病性视网膜病变(DR)的药效物质。方法采用HPLC法建... 目的建立不同来源地黄的高效液相色谱(HPLC)指纹图谱并研究其与糖基化终末产物(AGEs)干预下视网膜Müller细胞中低氧诱导因子-1α(HIF-1α)表达之间的谱效关系,初步阐明地黄防治糖尿病性视网膜病变(DR)的药效物质。方法采用HPLC法建立10批不同来源地黄指纹图谱;采用ELISA法测定地黄对AGEs干预下视网膜Müller细胞中HIF-1α表达的影响;采用偏最小二乘法分析特征峰峰面积与药效值之间的谱效关系。结果 10批样品HPLC指纹图谱共标定了17个特征共有峰,其中4、14、15号峰分别为梓醇、肉苁蓉苷A、毛蕊花糖苷。ELISA结果显示10批样品对AGEs干预下视网膜Müller细胞中HIF-1α的表达均有不同程度的抑制作用。偏最小二乘法分析结果显示,肉苁蓉苷A、毛蕊花糖苷及4个尚未确定结构的成分(峰13、5、16、17)可能是地黄防治DR的药效物质。结论谱效关系为初步阐明地黄防治DR药效物质提供了一个有效途径。 展开更多
关键词 地黄 视网膜MÜLLER细胞 糖基化终末产物(ages) 谱效关系 糖尿病性视网膜病变(DR) 低氧诱导因子-1α(HIF-1α) 偏最小二乘法
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Prevalence and Years Lived with Disability for Dental Caries among Children Aged 0-14 Years in China, 1990-2016 被引量:6
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作者 LIU Wen Zhao SU Ling Yu +3 位作者 XIE Xu Dong XIANG Xue Rong HUANG Jiao JI Ping 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2018年第5期376-381,共6页
The estimate of dental caries among Chinese children at the microscale level using standard methodology remains unclear. In this study, we assessed and analyzed the disease burden of childhood dental caries in China b... The estimate of dental caries among Chinese children at the microscale level using standard methodology remains unclear. In this study, we assessed and analyzed the disease burden of childhood dental caries in China by extracting data from the Global Burden of Disease, Injuries, and Risk Factors Study 2016 (GBD 2016). In 2016, the number of cases, prevalence, years lived with disability (YLD), and age-standardized YLD rate of dental caries was 93.0 million, 43.0%, 32,200 person years, and 14.8 per 100,000, respectively. Across 33 provincial units, the disease burden was highest in Hubei (YLD rate 28.6 per 100,000), lowest in Macao (9.1 per 100,000), while geographical clustering was not observed. Compared with 1990, the prevalence in 2016 decreased from 46.8% to 43.0%, and the YLD rate decreased from 16.5 per 100,000 to 14.8 per 100,000. Given the slight decrease in dental caries burden, the prevalence and disease burden remained high among Chinese children. Strategies for addressing the spatial inequity of childhood dental caries require geographical targeting. 展开更多
关键词 In Prevalence and Years Lived with Disability for Dental Caries among Children aged 0-14 Years in China 1990-2016
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Factors Influencing Preventive Behaviors of Mothers for Diarrhea in Children Aged 1-5 Years in Buol District, Indonesia 被引量:1
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作者 Helmi Rumbo Susheewa Wichaikull Boosaba Sanguanprasit 《Sociology Study》 2016年第12期745-753,共9页
This study aims to determine the factors related with mothers' behaviors in preventing diarrhea in children aged 1-5 years inBuol District. This was a cross-sectional survey design with health belief model as the con... This study aims to determine the factors related with mothers' behaviors in preventing diarrhea in children aged 1-5 years inBuol District. This was a cross-sectional survey design with health belief model as the conceptual framework. A total of 300mothers were selected by using purposive sampling method based on criteria. Mothers were interviewed by using astructured questionnaire during October to November 2015. A chi-square (X^2) test was used to determine a significantassociation between independent variables and dependent variable. The finding showed that 68.3% of mothers hadgood behaviors in preventing diarrhea. The factors significantly related to mothers' behaviors included perceivedsusceptibility to diarrhea, perceived severity of diarrhea, perceived benefits of diarrhea prevention behaviors, and perceivedbarriers of diarrhea prevention behaviors CP 〈 .01, p 〈 .01, p 〈 .01, and p 〈 .01 respectively). Further, mothers had highperception to comply with diarrhea prevention behaviors. Those who perceived that diarrhea prevention behaviors werehighly beneficial to their children had good behaviors in preventing diarrhea. However, taking certain actions must considernegative aspects. 展开更多
关键词 Mothers' PERCEPTIONS and behaviors preventing diarrhea CHILDREN aged 1-5 YEARS
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Analysis of the Variations of Body Build of Middle-and Old-aged and Research on the Prototype
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作者 李兴刚 沈卫勤 《Journal of China Textile University(English Edition)》 EI CAS 2000年第4期61-65,共5页
The characteristics of body build of middle - and old -aged women and its rule of variations as well as the basic sizes of various parts are discussed. All these are based on the body measurements of this age group, a... The characteristics of body build of middle - and old -aged women and its rule of variations as well as the basic sizes of various parts are discussed. All these are based on the body measurements of this age group, and also on the statistical studies of the measurement data. By setting the regression equation, the calculating formulae of various control parts are obtained, thus establishing the prototype of this age group for women. 展开更多
关键词 MIDDLE - and old - aged characteristics of BODY BUILD APPAREL sizes and types PROTOTYPE
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Verifying the Effects of an Education Program Leveraging Information Technology to Promote Cervical Cancer Screening in Women Aged 20 - 29—A One-Year Longitudinal Study
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作者 Nakamura Tomoko Sasaki Ayako 《Health》 2020年第11期1526-1542,共17页
The purpose of this research is to implement an IT-based education program in order to promote cervical cancer screenings for women aged 20 - 29 years, as well as to examine the results of said program. This is a long... The purpose of this research is to implement an IT-based education program in order to promote cervical cancer screenings for women aged 20 - 29 years, as well as to examine the results of said program. This is a longitudinal/comparative study of two groups, one for which the program was implemented (the intervention group), and the other for which it was not (the control group). The program consisted of attending a health lecture and encouragement to be screened one month, six months, and one year later sent through IT-based methods. The target was unmarried women aged 20 - 29 who had neither previously given birth nor had been screened for cervical cancer in a period one year prior. They were divided into two groups, the intervention group (n = 142) and control group (n = 145). The effectiveness of the program was assessed via an initial survey and further surveys six months and one year later. Results were based on the Japanese version of the Health Belief Model Scale for Cervical Cancer and the Pap Smear Test (HBMSCCPST), knowledge scores in the categories of Healthy Lifestyles, Cervical Cancer, Cervical Cancer Screening, and screening behavior. A two-way ANOVA of the HBMSCCPST subscales and knowledge scores in the initial, six-month, and one-year surveys was performed, showing interaction in Cervical Cancer (p = 0.00). Main effects were observed in Cervical Cancer Screening (p = 0.00) and Healthy Lifestyles (p = 0.00). Regarding the amount of change from the initial survey, knowledge scores in the Cervical Cancer (p = 0.027) and Cervical Cancer Screening (p = 0.016) categories were significantly higher in the intervention group than in the control group. There was no significant difference in cervical cancer screening rates (p = 0.26) between the two groups. However, a small-degree effect size was observed for Benefits, Seriousness, and Susceptibility subscales in both examinees and non-examinees. Although the educational program of this study was effective in improving the knowledge of women in their twenties, there was little improvement in HBMSCCPST and it did not lead to the promotion of cervical cancer screening. In order to raise interest in cervical cancer screening, it is necessary to consider useful content to guide women to consult with healthcare professionals, a long-term population approach, and organizational structure of consultation. 展开更多
关键词 Cervical Cancer Screening age 20 - 29 Educational Program INFORMATION Technology
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The overview of the language acquisition for Chinese city children aged 0-3 years
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作者 ZHU Jian-xiong 《Sino-US English Teaching》 2009年第8期5-8,21,共5页
This paper examines the language development of Chinese children aged 0-3years in city family. About baby's language development by the time stages accordingly. Paying special attention to the efforts for the parents... This paper examines the language development of Chinese children aged 0-3years in city family. About baby's language development by the time stages accordingly. Paying special attention to the efforts for the parents or caregivers. Infants receive more talking education and speak earlier. Most parents can hardly wait for their baby to say its first word and communicate with their baby. From about 2 years old, the child should be able to use simple phrases, retell simple story and even to sing song. Parents play an important role in this stage. By the 3 years children begin to use most of function words rather than omit them. And acquisition for the second language will help children's language development. The children have a gift for learning language. 展开更多
关键词 OVERVIEW LEARNING language acquisition aged 0-3 years
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The Role of Government in the Socialization of Old- age Service
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作者 XU Wenyan 《International English Education Research》 2017年第3期78-80,共3页
In the different stages of the development of the old-age service, the responsibility and function of the government will be different. In the new period, the government should redefine its role in advancing the socia... In the different stages of the development of the old-age service, the responsibility and function of the government will be different. In the new period, the government should redefine its role in advancing the socialization of the old-age service. The level of socialization of old-age services is not high, the lack of vitality of the pension market, the imperfect system and other problems arise because the government is not clear. The government should deal with the relationship between the main body of the market and avoid the 'double failure' of the government and the market. The government should play a guiding role in the policy, laws and regulations and other aspects of good service work for the social services of the elderly to provide a good development environment. 展开更多
关键词 old - age service socialization MARKET GOVERNMENT role orientation
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Prevelance of Pregnancy Complications among Women Aged 15 - 49 in Oğuzeli, Turkey
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作者 Neriman Aydin Birgul Ozcirpici Mithat Temizer 《Open Journal of Obstetrics and Gynecology》 2016年第11期623-629,共8页
As maternal deaths have decreased worldwide, increasing attention has been placed on the study of severe obstetric complications, such as hemorrhage, eclampsia, and obstructed labor, to identify where improvements can... As maternal deaths have decreased worldwide, increasing attention has been placed on the study of severe obstetric complications, such as hemorrhage, eclampsia, and obstructed labor, to identify where improvements can be made in maternal health. The objective of this study was to determine pregnancy complications and prenatal care among women aged 15 - 49 in O&#287;uzeli, Turkey, and to provide data for prevention in the field. This descriptive, cross-sectional study was conducted between February and May 2013 in O&#287;uzeli distinct, Turkey. The total women registered to family doctors in O&#287;uzeli was listed and, 470 women were selected using a stratified and simple random sampling technique. Pregnancy complications were asked for the last pregnancy of each women. Of the women, 23.9% (n = 109) declared that they experienced pregnancy complications during their pregnancies. The most frequent problems were anemia (11.1%) hypertension (3.7%) and diabetes mellitus (2.4%) respectively. Women having chronic diseases before their pregnancy were more likely to have pregnancy complications compared to healthy women (p = 0.005). The mean number of prenatal care among women having pregnancy complications was 5.47 ± 3.57, while it was 3.84 ± 3.00 among healthy women (p = 0.000). Women having chronic diseases should be handled carefully and, pregnancy should be delayed until the chronic disease’s remission. Family planning in primary care is the key measure to archive this. Early diagnosis of hypertension among young women is highly important for the women’s and infants’s health during pregnancy, and for the women’s future heath. During prenatal care, women should be trained about correct eating habits and activity. 展开更多
关键词 Pregnancy Complications Women aged 15 - 49 Prenatal Care
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THE RELATIONSHIP BETWEEN EGYPT AND PALESTINE IN THE EARLY BRONZE AGE(ca.3400-2000 BCE)
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作者 Guo Dantong, IHAC 《Journal of Ancient Civilizations》 2002年第1期1-6,共6页
The relationship between Egypt and Palestine can be traced back to theChalcolithic Age thanks to the evidence of current excavations in the Nile Deltaand Sinal.Palestinian pottery and cast metal objects from the Delta... The relationship between Egypt and Palestine can be traced back to theChalcolithic Age thanks to the evidence of current excavations in the Nile Deltaand Sinal.Palestinian pottery and cast metal objects from the Delta sites of Maadi,Minshat Abu Omar,and elsewhere have proved contacts with Palestine inProtodynastic(Nagada Ⅱ-Ⅲ)times.The Egyptian Protodynastic Period andDynasty 1 were contemporary with the Palestinian EB Ⅰ and EB Ⅲ,and 展开更多
关键词 ca.3400-2000 BCE THE RELATIONSHIP BETWEEN EGYPT AND PALESTINE IN THE EARLY BRONZE age
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Evaluation of the Integrated Management Program for Acute Malnutrition in the Douentza Health District, Mopti Region, Mali
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作者 Abdoul Salam Diarra Lamine Traore +12 位作者 Mohamed Diarra Tawfiq Abu Mamadou Traore Yacouba Guindo Sidi Sangare Seydou Kante Intimbeye Tembine Dramane Coulibaly Mamadou Fodé Diarra Salia Keita Sadio Sambala Diallo Mamadou Samake Hamadoun Sangho 《Food and Nutrition Sciences》 CAS 2024年第8期790-806,共17页
Introduction: Malnutrition is a major public health problem in Mali, despite the efforts of the government, its technical and financial partners. The aim of this study was to evaluate the integrated management program... Introduction: Malnutrition is a major public health problem in Mali, despite the efforts of the government, its technical and financial partners. The aim of this study was to evaluate the integrated management program for acute malnutrition (IMPAM). Methodology: This was a descriptive cross-sectional study that took place from January to December 2020 in the Douentza health district. The study included anyone with at least one malnourished child aged 6 to 59 months in their care who agreed to take part in the study, community health center staff who had given their consent, and the URENI manager at the Douentza reference health center. Data collected via questionnaires were entered into Excel and then analyzed using Epi-Info version 7 software. Results: A total of 138 acutely malnourished children aged 6 - 59 months, including 71 girls (51.45%), 138 accompanying mothers and 11 health workers, were included in our case study. Among the malnourished, 54.34% were in the 12 - 23 months age group and 69.57% had the severe form. 93% of the mothers interviewed were satisfied with the care provided, and all the health staff interviewed stated that community conflicts had an impact on IMPAM’s activities. Cure rates were 81% in Moderate Outpatient Nutritional Recovery and Education Unit (URENAM), 84% in Severe Ambulatory Nutritional Recovery and Education Unit (URENAS) and 92% in Recovery and Intensive Nutritional Education Unit (URENI). Drop-out rates were 19% in URENAM, 16% in URENAS and 0% in URENI. The death rate was 8% in URENI and 0% in URENAM and URENAS. Conclusion: This study confirms the high prevalence of malnutrition in the district (10.54%). It also reveals that factors such as inter-community conflict and insecurity have seriously affected the IMPAM program. 展开更多
关键词 CARE Acute Malnutrition Children aged 6 - 59 Months IMPAM Douentza
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胰岛素样生长因子-1与胎儿生长发育 被引量:12
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作者 朱子阳 刘倩琦 +3 位作者 王旭 田静 石星 韩蓓 《实用医学杂志》 CAS 北大核心 2011年第2期351-352,共2页
近年国内外对大于胎龄儿(1arge for gestational age,LGA)、小于胎龄儿(small for gestational age,SGA)发病机制广泛重视。研究表明,
关键词 胰岛素样生长因子-1 胎儿生长发育 GESTATIONAL 大于胎龄儿 小于胎龄儿 发病机制 age 国内外
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类黄酮化合物对糖基化反应终产物AGE的抑制作用 被引量:11
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作者 梁海燕 古德祥 +1 位作者 木苗直秀 古郡三千代 《天然产物研究与开发》 CAS CSCD 2002年第2期14-18,共5页
本研究比较了芸香苷 (G Rutin)、地奥明糖苷 (G Diosmin)、柚苷 (G Naringin)、橘皮苷 (G Hes peridin)对蛋白质糖基化反应的终产物AGE包括荧光性AGE、CML、Pentosidine的抑制作用。结果表明 ,各种类黄酮化合物对荧光性AGE、CML均有抑... 本研究比较了芸香苷 (G Rutin)、地奥明糖苷 (G Diosmin)、柚苷 (G Naringin)、橘皮苷 (G Hes peridin)对蛋白质糖基化反应的终产物AGE包括荧光性AGE、CML、Pentosidine的抑制作用。结果表明 ,各种类黄酮化合物对荧光性AGE、CML均有抑制作用 ,其抑制效果依次为芸香苷、地奥明糖苷、柚苷、橘皮苷 ,且比氨基胍的抑制作用相对持久。在对Pentosidine的抑制作用中 ,地奥明糖苷、柚苷、橘皮苷仅有微弱的抑制作用 ,而芸香苷则相反有一个促进作用。这可能是由于Pentosidine的生成路径与荧光性AGE和CML有所不同 ,有待进一步探讨。类黄酮化合物对AGE的抑制机理与其抗氧化性、消自由基作用有关。根据实验结果 ,笔者认为 ,芸香苷、地奥明糖苷、柚苷、橘皮苷等化合物对蛋白质的糖基化反应有抑制作用 。 展开更多
关键词 蛋白质糖基化终产物(age) CML(Nε-羧甲基赖氨酸) Pentosidine(戍糖甙素)
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2-(α-溴丙酰)硒吩及其类似物的合成 被引量:1
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作者 钟武 肖军海 李松 《中国医药工业杂志》 CAS CSCD 北大核心 2005年第10期597-598,共2页
硒吩和丙酸酐在85%磷酸作用下酰化得到2-丙酰硒吩,再用溴化铜溴代得到AGEs裂解剂的中间体2-(α-溴丙酰)硒吩,收率60%。同法制得类似物2-溴乙酰硒吩,收率89%。
关键词 2--溴丙酰)硒吩 2-溴乙酰硒吩 ages裂解剂 中间体 合成
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4-芳基香豆素类化合物的合成及体外降糖活性研究 被引量:2
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作者 胡玉恒 孙捷 +1 位作者 杨洁 王晓静 《化学研究》 CAS 2018年第4期357-361,共5页
以苯乙酮类化合物和碳酸二乙酯为原料合成了3个含有甲氧基的苯甲酰乙酸乙酯类化合物,在70%的浓硫酸催化下与取代的苯酚类化合物反应生成具有甲氧基的4-芳基香豆素4a-4d,在新制的碘化铝的催化下脱甲基,合成了4个含有多羟基的化合物5a-5d... 以苯乙酮类化合物和碳酸二乙酯为原料合成了3个含有甲氧基的苯甲酰乙酸乙酯类化合物,在70%的浓硫酸催化下与取代的苯酚类化合物反应生成具有甲氧基的4-芳基香豆素4a-4d,在新制的碘化铝的催化下脱甲基,合成了4个含有多羟基的化合物5a-5d.所有目标化合物均经过IR、1H NMR、ESI-MS对其进行了结构确认.通过测定α-葡萄糖苷酶抑制活性和AGEs形成自由基活性来评价其体外降糖活性. 展开更多
关键词 4-芳基香豆素 脱甲基 Α-葡萄糖苷酶 ageS
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National Nutrition and Health Systematic Survey for Children 0–17 Years of Age in China 被引量:5
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作者 YANG Zhen Yu ZHANG Qian +13 位作者 ZHAI Yi XU Tao WANG Yu Ying CHEN Bo Wen TANG Xue Jun YUAN Xiao Lin FANG Hong Yun ZHU Yan PANG Xue Hong WANG Shuo XU Juan LI Rui Li SI Xiang ZHAO Wen Hua 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2021年第11期891-899,共9页
The main purpose of the National Nutrition and Health Systematic Survey for children 0-17 years of age in China(CNHSC)was to collect basic data on the nutrition,development,and health status for children in different ... The main purpose of the National Nutrition and Health Systematic Survey for children 0-17 years of age in China(CNHSC)was to collect basic data on the nutrition,development,and health status for children in different regions across China using evidence-based,reliable,and cost-effective approaches.Children and their parents or guardians from seven regions(south,southwest,north,northwest,eastern,central,and northeast China)in China were recruited.A multi-stage stratified randomized sampling method was used.Two provinces were randomly sampled from each of the seven regions,from which one urban district and one rural country were also randomly sampled,resulting in a total of 28 survey counties/districts.Dietary surveys,health examinations,laboratory testing,and questionnaires were used to collect dietary intake,nutritional status,child development,and health status information.Nutrition,health,and lifestyle assessment of children and their parents was determined using the Knowledge Attitude Practice(KAP)survey.Greater than 100,000 children(38,000 children<6 years of age and 66,000 children6-17 years of age)completed the survey.The survey provided comprehensive data on child nutrition and health status for future studies and will serve as the basis for an integrated nutrition and health improvement strategies proposal for children in China. 展开更多
关键词 Children 0-17 years of age Nutritional status Health status Study protocol
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Test analysis of detection of damage to a complicated spatial model structure 被引量:2
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作者 Long-He Xu Zhong-Xian Li Jia-Ru Qian 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2011年第3期399-405,共7页
A two-stage damage detection approach is proposed and experimentally demonstrated on a complicated spatial model structure with a limited number of measurements. In the experiment,five known damage patterns,including ... A two-stage damage detection approach is proposed and experimentally demonstrated on a complicated spatial model structure with a limited number of measurements. In the experiment,five known damage patterns,including 3 brace damage cases and 2 joint damage cases,were simulated by removing braces and weakening beam鈥揷olumn connections in the structure. The limited acceleration response data generated by hammer impact were used for system identification,and modal parameters were extracted by using the eigensystem realization algorithm. In the first stage,the possible damaged locations are determined by using the damage index and the characteristics of the analytical model itself,and the extent of damage for those substructures identified at stage I is estimated in the second stage by using a second-order eigen-sensitivity approximation method. The main contribution of this paper is to test the two-stage method by using the real dynamic data of a complicated spatial model structure with limited sensors. The analysis results indicate that the two-stage approach is ableto detect the location of both damage cases,only the severity of brace damage cases can be assessed,and the reasonable analytical model is critical for successful damage detection. 展开更多
关键词 Damage detection. Complicated structure. Two-stage approach - Eigen-sensitivity analysis. Joint dam- age
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