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Contribution to Improving the Management of Sewage Sludge in the Western Region: Case of Bafoussam 1st

Journal of Geoscience and Environment Protection 2022年第3期10卷 111-119页

作者： félicite obono mba Ngongang Sanou Department of Environmental Sciences National Advanced School of Engineering The University of Maroua Maroua Cameroon

Sanitation is a particularly sensitive issue in the world, especially in Africa where local communities are plagued by the problem of managing sludge which is causing a lot of damage in Africa and mainly in Cameroon. This study aims to contribute to improving the management of sewage sludge in the municipality of Bafoussam 1st. for this study, the methodology used is field survey. The questionnaire was submitted to 120 households in the commune of Bafoussam 1st, in particular, we take into account knowledge of the health and environmental risks that can result from improper handling of sludge and its treatment. The results show that the most widespread sanitation system is traditional latrines. Similarly, 79.19% of those surveyed dump, the sludge collected at the landfill against only 14.28% who dump it in fields and 6.53% have no idea about the fate of the sludge from their sanitary facilities. It should also be noted that 55.83% of the people surveyed are not aware of the health and environmental risks of untreated sewage sludge and therefore do not take the precautions to avoid it. Subsequently, 93.75% of respondents say that the current landfill would be a nuisance and the main nuisances identified are water pollution and subsequent fish poisoning. Physico-chemical analyzes of the sludge revealed values much higher than the values provided for by the WHO standards. Thus, total nitrogen and phosphate ions represented respectively 97 mg/L and 47 mg/L against 35 and 30.4 mg/L for the standard;COD and BOD5 represented respectively 3250 mg/L and 1100 mg/L against 150 and 40 mg/L provided by the WHO standards. It follows the temperature and the MES which gave values of 32.7°C and 1750 mg/L, values much higher than the standard (30°C and 50 mg/L).

关键词： Sewage Sludge Management Treatment Sanitation Bafoussam 1st

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Additive neurorestorative effects of exercise and docosahexaenoic acid intake in a mouse model of Parkinson’s disease

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Neural Regeneration Research 2025年第2期20卷 574-586页

作者： Olivier Kerdiles Méryl-farelle Oye Mintsa Mi-mba Katherine Coulombe Cyntia Tremblay VincentÉmond Martine Saint-Pierre Clémence Rouxel Line Berthiaume Pierre Julien francesca Cicchetti frédéric Calon facultéde pharmacie UniversitéLaval1050 Avenue de la MédecineQuebecQCCanada Axe Neuroscience Centre de recherche du CHU de Québec-UniversitéLaval(Pavillon CHUL)2705 Boulevard LaurierQuebecQCCanada Institute of Nutrition and functional foods QuebecQCCanada Optinutribrain International Associated Laboratory(NutriNeuro FranceINAFCanada)QuebecQCCanada Axe Endocrinologie et Néphrologie Centre de recherche du CHU de Québec-UniversitéLavalQuebecQCCanada Département de Médecine Facultéde MédecineUniversitéLavalQuebecQCCanada Département de Psychiatrie et Neurosciences Facultéde MédecineQuebecQCCanada

There is a need to develop interventions to slow or reverse the degeneration of dopamine neurons in Parkinson’s disease after *** that preclinical and clinical studies suggest benefits of dietary n-3 polyunsaturated fatty acids,such as docosahexaenoic acid,and exercise in Parkinson’s disease,we investigated whether both could synergistically interact to induce recovery of the dopaminergic ***,mice received a unilateral stereotactic injection of 6-hydroxydopamine into the striatum to establish an animal model of nigrostriatal *** weeks after lesion,animals were fed a docosahexaenoic acid-enriched or a control diet for the next 8 *** this period,the animals had access to a running wheel,which they could use or *** acid treatment,voluntary exercise,or the combination of both had no effect on(i)distance traveled in the open field test,(ii)the percentage of contraversive rotations in the apomorphine-induction test or(iii)the number of tyrosine-hydroxylase-positive cells in the substantia nigra pars ***,the docosahexaenoic acid diet increased the number of tyrosine-hydroxylase-positive terminals and induced a rise in dopamine concentrations in the lesioned *** to docosahexaenoic acid treatment or exercise alone,the combination of docosahexaenoic acid and exercise(i)improved forelimb balance in the stepping test,(ii)decreased the striatal DOPAC/dopamine ratio and(iii)led to increased dopamine transporter levels in the lesioned *** present results suggest that the combination of exercise and docosahexaenoic acid may act synergistically in the striatum of mice with a unilateral lesion of the dopaminergic system and provide support for clinical trials combining nutrition and physical exercise in the treatment of Parkinson’s disease.

关键词： 6-hydroxydopamine dopamine dopamine transporter exercise neurorestoration Parkinson’s disease polyunsaturated fatty acids omega-3

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Effect of Cadmium and Herbicides on the Growth, Chlorophyll and Soluble Sugar Content in Rice Seedlings

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Wuhan University Journal of Natural Sciences 2006年第3期11卷 742-748页

作者： HUANG He XIONG Zhiting LI Minjing XIONG Shuanglian LI Shenglan felicite obono mba College of Resources and Environment Sciences Wuhan UniversityWuhan 430072 Hubei China

To investigate the combined effects of Cd^2＋（ 0,10,100,500 μmol/L） , acetochlor （AC）（0,1.6,4.0,8.0μmol/L）, and bensulfuronmethyl （BSM）（ 0,0.16,0.40,0.80 μmol/L） on the biomass,leaf soluble sugar, total chlorophyll （chl） content, chl a/b ratio, and Cd content in roots and shoots in the rice seedlings, pot culture experiments were conducted with rice （Oryza sativa L. ） cultivar Jinyou 402. The results showed that the Cd and AC combined treatment （Cd＋ AC treatment） significantly inhibited the growth of the roots and shoots. The root dry weight/shoot dry weight （RDW/SDW） ratio, total chlorophyll content and chl a/b ratio decreased by 41%, 50%, 56% , respectively, in comparison with the control, as well as the leaf soluble sugar content, plant dry weight /plant fresh weight （PDW/PfW） ratio increased by 284% and 44% , respectively. Cd content in the roots and shoots had a decreasing tendency with the increasing concentration of AC under the Cd＋AC treatment. The Cd and BSM combined treatment （Cd＋BSM treatment） had a similar result to the Cd＋AC treatment. The results suggest that the toxicity of Cd to rice seedlings has been enhanced due to its combination with herbicides.

关键词： cadmium herbicide chlorophyll soluble sugar rice

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Recovery of Organic Waste with Other Biological Components for the Production of Organic fertilizer: Improved Biochar

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Journal of Geoscience and Environment Protection 2022年第3期10卷 76-83页

作者： félicité obono mba Loic foka Deffo Augustin Goudoum Department of Environmental Sciences National Advanced School of Engineering The University of Maroua Maroua Cameroon Department of Agriculture Livestock and Derived Products National Advanced School of Engineering The University of Maroua Maroua Cameroon

The study was carried out in Baham district in the West Cameroon region, as part of the recovery of organic waste with other biological components for the manufacture of an organic fertilizer (improved biochar). Through observations and a survey questionnairy submitted to 100 farmers, it appears that the majority use synthetic chemical fertilizers. farmers using chemical fertilizers find them dangerous to their health. In addition, 58.57% of these farmers said they felt unwell after spreading these fertilizers. However, 64.28% of these farmers do not acquire PPE for reasons of financial means on the one hand and ignorance on the other hand. 54.28% of respondents using only chemical fertilizers noted declining agricultural production. The surveys also reveal that biochar (of plant origin) as a solution proposed by CIPCRE is used by a minority of farmers (21%) in the said locality on the one hand and on the other hand has limits in terms of intake nutrients for crops;this was confirmed by analyzes of the physico-chemical parameters.

关键词： Organic Waste Biochar Improved Biochar Sustainable Agriculture

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Evaluation of the Efficacy of an Aloe barbadensis Based Biological Insecticide against Pests of Abelmochus esculentus for Promoting Ecological Agriculture (far-North, Cameroon)

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Agricultural Sciences 2024年第5期15卷 590-603页

作者： mba félicité obono Laurentine Naoutissa Samuel Ntamack Augustin Goudoum Department of Environmental Science National Advanced School of Engineering The University of Maroua Maroua Cameroon Department of Agriculture Livestock and Derived Products National Advanced School of Engineering The University of Maroua Maroua Cameroon

Chemical insecticides have been considered as a means to combat crop pests. Although their effectiveness is evident, their impact on the environment is increasingly being discussed. The aim of this study is to determine the agro-ecological potential of a biological insecticide (C25H32O12) based on Aloe barbadensis in a Sahelian context. for this purpose, a completely randomized block experimental design with 3 replications and 4 treatments was set up to experiment with Aloe barbadensis as a bioinsecticide against pests of Abelmoschus esculentus. However, data were collected using an observation and parameter monitoring grid. This includes the cultivation of Abelmoschus esculentus, soil preparation, seeding and watering, plot labeling, preparation of the bioinsecticide (selection and preparation of raw materials, grinding of Aloe barbadensis miller and extraction of the crude bioinsecticide, quantification of treatment doses and dilution, and obtaining the formulated bioinsecticide), plant watering, plant treatment, and finally parameter monitoring. The results obtained reveal that the level of damage is significantly high in the control treatment T0 (63%) compared to the other treatments, with 29% for treatment T1, 7% for T2, and 1% for T3, implying a strong action capability of this insecticide against pests of Abelmoschus esculentus. Therefore, it can be concluded that for a normal growing season of Abelmoschus esculentus, this biological insecticide should be sprayed 12 times. furthermore, this biological insecticide is unique in that it does not inflict any gastric toxicity on the pests, which gives it the characteristic of being a repellent. It is a biological insecticide whose efficacy period has been tested, with a minimum duration of 21 days. In conclusion, this formulated bioinsecticide based on Aloe barbadensis demonstrates significant efficacy against pests of Abelmoschus esculentus. In the future, we will consider experim

关键词： Aloe Biological Insecticide Pests Agro-Ecological

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Induced Morphisms Between Localization Genera of Groups

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Algebra Colloquium 2014年第2期21卷 285-294页

作者： J.C. mba P.J. Witbooi University of the Western Cape Private Bag X17 7535 Bellville South Africa

for a certain class of groups under a given finite group f, we define and compute genus groups, which coincide with the known genus groups in the case that f＇ is the trivial group. We prove the existence of various induced homomorphisms between genus groups. We discover an induced morphism arising from factoring out a finite normal subgroup.

关键词： localization restricted genus groups under a finite group

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Study of the Types of Refractive Disturbances Obseved during Hyperglycemia in Humans

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Open Journal of Ophthalmology 2022年第2期12卷 142-151页

作者： Angue Tatiana Harly mba Aki Jean fidèle Nnang Essone Nesta Ziza Ngaila Daniella Nsame Muriel obono Akoma Olive Rosine Matsanga félix Ovono Abessolo Department of Surgery and Specialties University of Health Sciences Libreville Gabon Ophthalmology Unit The Mother-Child University Hospital of Libreville Gabon Department of Physiology University of Health Sciences Libreville Gabon Department of Endocrinology and Metabolic Diseases Libreville Gabon Department of Biochemistry University of Health Sciences Libreville Gabon

Introduction: Refractive disturbances have been observed during hyperglycemia. However, there remains controversy as to the types of disturbances that it induces. Objective: To determine the types of refractive disturbances observed during hyperglycemia in humans. Population and Methods: This was an observational and cross-sectional study with an analytical purpose conducted from July to November 2021. Emmetropia, hypermetropia, and myopia as well as blood glucose levels were compared between day 0 (D0) and day 30 (D30) after initiation of hypoglycemic therapy in 222 people (444 eyes) with recently discovered hyperglycemia (Chi-2;p Results: At D0, the mean of blood glucose was 18.1 mmol/L ± 8.2 vs 6.9 mmol/L ± 3.0 at D30 (p = 0.001). At day 0, 80% (n = 355) of eyes were hypermetropic compared to 73.9% (n = 328) at D30 (p = 0.02). At D0, 14.2% of eyes (n = 63) were myopic compared to 11.3% (n = 50) at D30 (p = 0.02). Refraction improved from 0.75 to 1.5D for 34.5% (n = 18) of hypermetropic eyes and 10.2% (n = 2) of myopic eyes. Conclusion: Our results show that hypermetropia is the most common ametropia during hyperglycemia. Moreover, these data suggest that the normalization of blood glucose improves refraction.

关键词： Hyperglycemia Hypermetropia Myopia Hypoglycemic Treatment Libreville

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mba教学案例精选

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2015年

作者：西南大学mba教育中心编

本书由西南大学mba教育中心组织编写。根据mba的主要研究方向，精选了十多个教学案例，并围绕一定的教学目的与用途，通过启发思考培养学员思考分析和决断的意识，并采取独立研究和相互讨论的方式，来提高学员实际的分析问题和解决问题... 详细信息

ISBN: (数字)9787562174011

本书由西南大学mba教育中心组织编写。根据mba的主要研究方向，精选了十多个教学案例，并围绕一定的教学目的与用途，通过启发思考培养学员思考分析和决断的意识，并采取独立研究和相互讨论的方式，来提高学员实际的分析问题和解决问题的能力。本书所选的多数案例时效性较强且具有一定的代表性，内容涉及企业战略管理、营销管理、财务管理、财务会计、运营管理、管理沟通、电子商务等方面。在编写体例上，针对mba教学不同的课程体系，在教学目的的要求下，选编了专题案例和综合性案例，从基本事实、事件背景、人物背景、关键问题、显性问题、隐性问题、关键问题分析、理论依据、实践经验、建议的解决方案、利弊说明等各个环节入手通过问题的提出，启发和引导学员就案例中的问题提出解决的思路和方向，并在此基础上提供了相关的背景信息和理论依据，同时为了更好的实现教学目标，每篇案例后还提供了案例教学计划和关键要点等，帮助学生培养分析能力、决策能力、解决实际问题的能力。这样的编写体例兼具启发性和导向性，贴合mba的实际教学，有助于教师的授课和学员实际管理运用能力的提升。本书的作者是来自一线的专家教授，并且具有实际的企业操作经验，内容具有实际参考和实用价值。同时，该书作为西南大学mba的案例教学教材拥有一定数量的使用群体，同时也可以作为其他学校的教学和研究参考。

关键词：企业管理案例世界

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2005mba联考备考教程英语分册版

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2004年

作者： mba入学考试命题研究组编

本书包括模拟测试与复习对策、听力、词法与词汇、阅读理解、综合填空、英译汉、写作、历年试题与解析等八部分内容。

ISBN: (数字)7302082618

ISBN: (纸本)7302082618

本书包括模拟测试与复习对策、听力、词法与词汇、阅读理解、综合填空、英译汉、写作、历年试题与解析等八部分内容。

关键词：英语研究生入学考试工商行政管理

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mba联考考前辅导

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作者：全国mba联考命题研究小组

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