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Assessment of Image Quality Parameters for Computed Tomography in the City of Yaoundé

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Open Journal of Radiology 2018年第1期8卷 37-44页

作者： Calvin Didier Njiki Joseph Eric Martial ndjaka Manyol Yolande Ebele Yigbedeck Daniel William Abou’ou Blaise Clovis Yimele jean Faustin Sabouang National Radiation Protection Agency Yaoundé Cameroon

Performance evaluation of computed tomography is not significant in the Republic of Cameroon in general and more particularly in the city of Yaoundé. Therefore, this work aimed to analyze image performances of 05 CT scanners in 05 medical facilities in the city of Yaoundé, by using the Catphan 700 phantom and test procedures of the Atomic Energy Agency. Five quality control tests were performed on each CT-Scanner. All the CT scanners evaluated showed good results and were not disapproved in three of the five tests performed. The difference between the measured spatial resolution for each of the five CT scanners and the spatial resolution specified by the manufacturer was very high. The low contrast resolution of four of the five CT scanners was found low when compared to the low contrast resolution specified by the manufacturers.

关键词： CT Image Quality Catphan 700

Knowledge,attitudes and practices concerning epilepsy among nurses and midwives working in primary health care settings in Ouagadougou of Burkina Faso

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Acta Epileptologica 2023年第2期6卷 90-99页

作者： Alfred Anselme Dabilgou Alassane Dravé Julie marie Adeline Wendlamita Kyelem Fatimata Kinda Christian Napon Athanase Millogo jean Kaboré Department of Neurology University Hospital Yalgado OuedraogoBox 7022Ouagadougou 03Burkina Faso Department of Neurology Regional University Hospital of Ouahigouya03 BP 7009 Ouagadougou 03Burkina Faso Department of Neurology University Hospital of Bogodogo14 Box 371Ouagadougou 14Burkina Faso Department of Neurology Souro Sanou University Teaching Hospital01Box 676Bobo DioulassoBurkina Faso

Background In developing countries,there is a lack of epilepsy knowledge among health *** objective of this study was to assess the knowledge,attitude and practice concerning epilepsy among nurses and midwives working in primary health care settings in *** We carried out a cross-sectional study in the health districts of Ouagadougou from August 1st to September 15th,*** nurses and midwives working in three health districts were included in this *** A total of 213 participants with a mean age of 39.5 years were included in the survey;79.81%of them had a general certification in secondary education and 62%had a professional experience of more than 10 *** 99%of the participants had not received training on epilepsy-related care during the last six *** addition,74.5%of the participants had a good knowledge on epilepsy and 65%had a good practice toward *** level of knowledge was associated with the workplace,years of training,and the professional *** level of knowledge about epilepsy was also associated with the level of education,while there was a significant link between professional status and nurses’level of practice in the management of *** Efforts must be made to provide continuing education for nurses in order to improve their knowledge on epilepsy.

关键词： Epilepsy Knowledge Attitude Practice Paramedics Ouagadougou Burkina

From Matter to Life:Chemistry?Chemistry!

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复旦学报（自然科学版） 2007年第5期46卷 562-页

作者： jean-marie LEHN ISIS Université Louis PasteurStrasbourg and Collège de France

1 Results Animate as well as inanimate matter,living organisms as well as materials,are formed of molecules and of the organized entities resulting from the interaction of molecules with each *** provides the bridge between the molecules of inanimate matter and the highly complex molecular architectures and systems which make up living organisms. Synthetic chemistry has developed a very powerful set of methods for constructing ever more complex *** chemistry seeks to con...

关键词： inanimate matter living organism supramolecular chemistry

Functional Nanostructures and Dynamic Materials through Self-Organization

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复旦学报（自然科学版） 2007年第5期46卷 554-页

作者： jean-marie LEHN ISIS Université Louis PasteurStrasbourg and Collège de France

1 Results Supramolecular chemistry is actively exploring systems undergoing *** design of molecular information controlled,"programmed"and functional self-organizing systems provides an original approach to nanoscience and *** spontaneous but controlled generation of well-defined,functional molecular and supramolecular architectures of nanometric size through self-organization represents a means of performing programmed engineering and processing of functional nanostruct...

关键词： nanostructure dynamic materials self-organization

Phenotypic, Cytological and Molecular (AFLP) Analyses of the Cotton Synthetic Allohexaploid Hybrid (G. hirsutum×G. longicalyx)²

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Open Journal of Genetics 2020年第2期10卷 35-49页

作者： N’Guessan Olivier Konan jean-marie Jacquemin jean-Pierre Baudoin Guy Mergeai Laboratory of Crop Improvement Agroforestry Unit Jean Lorougnon Guédé University Daloa C&#244 te D’Ivoire Laboratory of Tropical Agroecology Gembloux Agro-Bio Tech Liège University Gembloux Belgium Department of Life Sciences Bioengineering Unit Walloon Agricultural Research Centre (CrAw) Gembloux Belgium

The wild cotton diploid species (2n = 2x = 26) are important sources of useful traits such as high fiber quality, resistance to biotic and abiotic stresses etc., which can be introgressed into the cultivated tetraploid cotton Gossypium hirsutum L (2n = 4x = 52), for its genetic improvement. The African wild diploid species G. longicalyx Hutchinson and Lee could be used as donor of the desirable traits of fiber fineness and resistance to reniform nematode. However, hybridization of wild diploid species and cultivated tetraploid cotton encounters a sterility problem of the triploid (2n = 3x = 59), mainly due to ploidy. The restoration of the fertility can be done by creating an allohexaploid (2n = 6x = 78) through the doubling with colchicine of the sterile triploid chromosomes. With this method, a synthetic allohexaploid hybrid (G. hirsutum × G. longicalyx)2 has been obtained. This genotype was studied using phenotypic, cytological and molecular (AFLP) analyses in order to confirm its hybridity and its caryotype, and also to verify the expression of the desirable traits coming from G. longicalyx. The studied genotype showed a quite good level of pollen fertility (83%), and apart from larger seeds and some minor seedling anomalies, most of its morphological characteristics were intermediate between the two parental species. It had 78 chromosomes, proving its hexaploid status. Molecular analysis revealed 136 AFLP loci in this hexaploid, all from G. hirsutum and G. longicalyx, demonstrating its hybrid status. In addition, the hexaploid exhibited the useful traits of G. longicalyx with regard to its remarkable fiber fineness and its high resistance to the reniform nematode. This allohexaploid hybrid constitutes an interesting agronomic material, which can be used as a bridge for the transfer of useful agronomic traits from wild species to varieties of G. hirsutum.

关键词： Gossypium spp Hexaploid Hybrid Chromosomes AFLP Marker Plant Breeding

Anatomical and electrophysiological plasticity of locomotor networks following spinal transection in the salamander

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Neuroscience Bulletin 2013年第4期29卷 467-476页

作者： jean-marie Cabelguen Stéphanie Chevallier Ianina Amontieva-Potapova Céline Philippe Neurocentre Magendie INSERM U 862 - Bordeaux University

Recovery of locomotor behavior following spinal cord injury can occur spontaneously in some vertebrates, such as fish, urodele amphibians, and certain reptiles. This review provides an overview of the current status of our knowledge on the anatomical and electrophysiological changes occurring within the spinal cord that lead to, or are associated with the [e-expression of locomotion in spinally-transected salamanders. A better understanding of these processes will help to devise strategies for restoring locomotor function in mammals, including humans.

关键词： salamander spinal cord locomotor recovery regeneration

Bladder-colon chronic cross-sensitization involves neuro-glial pathways in male mice

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World Journal of Gastroenterology 2022年第48期28卷 6935-6949页

作者： Karim Atmani Fabien Wuestenberghs Maximilien Baron Illona Bouleté Charlène Guérin Wafa Bahlouli David Vaudry jean Claude do Rego jean-Nicolas Cornu Anne-marie Leroi Moïse Coëffier Mathieu Meleine Guillaume Gourcerol Nutrition Gut and Brain Unit(Inserm U1073)Institute for Research and Innovation in BiomedicineUniversitéde Rouen NormandieRouen 76000France Department of Gastroenterology and Hepatology UniversitéCatholique de LouvainCHU UCL NamurYvoir 5530Belgium Department of Physiology CHU RouenUniversitéde Rouen NormandieRouen 76031France Department of Urology CHU RouenUniversitéde Rouen NormandieRouen 76000France Inserm UMR 1245Team Epigenetics and Pathophysiology of Neurodevelopmental DisordersUniversitéde Rouen NormandieRouen 76000France Behavioural Analysis Platform(SCAC) HeRacLeS Inserm US51-CNRS UAR2026Institute for Research and Innovation in BiomedicineUniversitéde Rouen NormandieRouen 76000France Department of Nutrition CHU RouenUniversitéde Rouen NormandieRouen 76000France Inserm U1107 NeuroDolClermont Auvergne UniversityClermont-Ferrand 63000France

BACKGROUND Irritable bowel syndrome and bladder pain syndrome often overlap and are both characterized by visceral *** pelvic organs share common sensory pathways,it is likely that those syndromes involve a cross-sensitization of the bladder and the *** precise pathophysiology remains poorly *** To develop a model of chronic bladder-colon cross-sensitization and to investigate the mechanisms *** Chronic cross-organ visceral sensitization was obtained in C57BL/6 mice using ultrasound-guided intravesical injections of acetic acid under brief isoflurane *** sensitivity was assessed in conscious mice by measuring intracolonic pressure during isobaric colorectal ***,used as a marker of colorectal inflammation,was measured in the colon,and colorectal permeability was measured using chambers.c-Fos protein expression,used as a marker of neuronal activation,was assessed in the spinal cord(L6-S1 level)using *** fluorescent protein on the fractalkine receptor-positive mice were used to identify and count microglia cells in the L6-S1 dorsal horn of the spinal *** expression of NK1 receptors and MAPK-p38 were quantified in the spinal cord using western *** Visceral hypersensitivity to colorectal distension was observed after the intravesical injection of acetic acid vs saline(P<0.0001).This effect started 1 h post-injection and lasted up to 7 d *** increased permeability or inflammation was shown in the bladder or colon 7 d *** hypersensitivity was associated with the increased expression of c-Fos protein in the spinal cord(P<0.0001).In green fluorescent protein on the fractalkine receptor-positive mice,intravesical acetic acid injection resulted in an increased number of microglia cells in the L6-S1 dorsal horn of the spinal cord(P<0.0001).NK1 receptor and MAPK-p38 levels were increased in the spinal cord up to 7 d after

关键词： Cross-organ sensitization MAPK-p38 Microglia NK1 receptor Pain Visceral hypersensitivity

沸石表面有机金属化学──ZSM-5外表面上—Ge(n-C_4H_9)_x基团的接枝及其性质研究

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高等学校化学学报 2001年第2期22卷 285-288页

作者：王绪绪赵慧霞付贤智 Frédéric LEFEBVRE jean-marie BASSET 福州大学光催化研究所福州350002 Laboratoire de Chimie Organo métalliquede Surface

用气体分析及IR ,NMR和元素分析等方法研究了真空系统中 2 30和 2 80℃下四丁基锗在ZSM 5沸石表面上的接枝反应 ,并对所得沸石的热稳定性和吸附性质进行了表征 .与作者曾报道的在硅胶及丝光沸石上的反应类似 ,四丁基锗也能与ZSM 5沸石... 详细信息

用气体分析及IR ,NMR和元素分析等方法研究了真空系统中 2 30和 2 80℃下四丁基锗在ZSM 5沸石表面上的接枝反应 ,并对所得沸石的热稳定性和吸附性质进行了表征 .与作者曾报道的在硅胶及丝光沸石上的反应类似 ,四丁基锗也能与ZSM 5沸石表面上的硅羟基发生缩合反应 ,在其外表面或孔口生成组成为 (≡Si—O) xGe(n C4 H9) 4-x(x =13)的表面有机锗化合物 .在 2 30℃接枝丁基锗基团不影响沸石的结构和表面积 ,仅改变它的孔口大小 .在改性后的沸石上 ,N2 的吸附性质没有改变 ,而不同分子尺寸的烃 ,如正己烷、2 甲基戊烷、2 ,3 二甲基丁烷却呈现出完全不同于起始ZSM 5沸石的择形吸附效应 .

关键词： ZSM-5 四丁基锗表面修饰有机金属化合物表面接枝反应沸石

Characterization of Personal Clothing Worn by Pesticide Sprayers in Foumbot Agricultural Area (Cameroon)

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Agricultural Sciences 2019年第8期10卷 1056-1072页

作者： Sonchieu jean Bitsoga marie Gracile Ngassoum Martin Benoit Department of Social Economy and Family Management Higher Technical Teacher Training College University of Bamenda Bamenda Cameroon Department of Applied Chemistry ENSAI University of Ngaoundere Ngaoundere Cameroon

Personal protective equipment is intended to protect worker from risks that cannot be eliminated for more effective safety. This study was aimed at evaluating the type of cloth worn by pesticide users in Foumbot agricultural area (West Region of Cameroon) and to identify signs and symptoms related to pesticides effects on human health. A survey was conducted on seventy (70) farmers randomly selected using a questionnaire made up of closed and opened questions. Specimens of cloth were collected, identified and analyzed for the water and vapor absorbency and permeability. The identification was done by burning and solubility tests. Results showed that no farmer used adequate protective clothing, they all presented many pesticide-related signs and symptoms such as dizziness, skin irritation, eye-watering and breathing difficulties;the permeation of clothes that they wear is high with high vapor and water absorbency capacity;they were made up with Cotton fiber, blended cotton fibre, wool, polyester and polyethylene;a local laminated fabric manufactured with Tri-acetate fiber was identified with great capacity of protection. This study raised inappropriate characteristics of protective materials used by farmers in Foumbot agricultural area. However, a local fabric was identified to have been adapted to pesticide applications and may be promoted after further study on the comfortability.

关键词： Pesticides Personal Protective Equipment Safety Health Farmers