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Status of Solid Waste Management Service in Metu Town, South-Western Ethiopia 埃塞俄比亚西南部梅图镇固体废物管理服务现状
Pub Date : 2020-08-12 DOI: 10.19080/IJESNR.2020.25.556166
B. Gobena
Municipal solid waste management (MSWM) services in most cities and towns are already over-burdened, as cities and municipalities cannot cope with the speeded pace of waste production provided that inadequate financial capacity, insufficient manpower, and facilities. A cross-sectional study was conducted to assess the status of municipal solid waste management service of Metu town using a questionnaire and observational checklist. A total of 252 households (HHs) and 65 commercial and institutional establishments (CIs) were included in this study. Data was analyzed using Statistical Package for Social Sciences (SPSS) software version 20. Accordingly, among 317 study participants, 213(67.1%) females and 104 (32.9%) males with a mean age of 36.45 have participated. Concerning solid waste collection frequency, more than 35% of HHs and 70% of CIs get the service from Micro and Small Enterprise (MSE) with irregular interval whereas; about 56% of HHs and 15% of CIs responded that they get the service from MSE in more than 30 days.
大多数城镇的城市固体废物管理(MSWM)服务已经负担过重,因为在财政能力、人力和设施不足的情况下,城市和市政当局无法应对废物产生的快速速度。采用问卷调查法和观察性检查表法对梅图镇城市生活垃圾管理服务现状进行了评估。本研究共包括252户家庭(HHs)和65家商业和机构机构(ci)。数据分析使用SPSS (Statistical Package for Social Sciences)软件第20版。因此,在317名研究参与者中,213名(67.1%)女性和104名(32.9%)男性参与,平均年龄为36.45岁。在固体废物收集频率方面,35%以上的卫生保健机构和70%以上的卫生保健机构由小微企业(MSE)提供服务,且时间间隔不规律;约56%的卫生保健人员和15%的卫生保健人员表示,他们在30天以上的时间内获得了MSE的服务。
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引用次数: 0
Machine Learning Models for Corn Yield Prediction: A Survey of Literature 玉米产量预测的机器学习模型:文献综述
Pub Date : 2020-08-06 DOI: 10.19080/ijesnr.2020.25.556161
Guiping Hu
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引用次数: 0
Land Degradation and its Management: A Review 土地退化及其治理研究进展
Pub Date : 2020-07-02 DOI: 10.19080/ijesnr.2020.25.556157
Muhammad Adnan
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引用次数: 9
Fuel Consumption for Various Dishes for a Wood-Fueled and Charcoal Fueled Improved Stoves used in Rural Northern Ghana 加纳北部农村使用的以木柴和木炭为燃料的改良炉灶的各种菜肴的燃料消耗
Pub Date : 2020-06-25 DOI: 10.19080/ijesnr.2020.25.556156
A. Moro
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引用次数: 1
Effect of Salinity Stress on Growth, Yield and Quality of Roses: A Review 盐胁迫对玫瑰生长、产量和品质的影响
Pub Date : 2020-06-24 DOI: 10.19080/ijesnr.2020.25.556155
Muhammad Adnan
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引用次数: 3
Nitrates in Drinking Water –A Beneficial Effect against Cancer 饮用水中的硝酸盐-对癌症有益
Pub Date : 2020-06-02 DOI: 10.19080/IJESNR.2020.24.556147
Vishal Shah
Nitrates in drinking water have been hypothesized to cause cancer. In the current meta-data analysis based study, we investigate if populations having high nitrate concentrations in drinking water have increased incidence rates of cancer. The hypothesis was tested using the county level cancer incidence rate data obtained from the Center for Disease Control, and nitrate data obtained from the individual water system’s consumer confidence reports. Results indicate that a nitrate concentration in drinking water does have a preventative effect on the Kidney and Renal Pelvic, Larynx, Lung and Bronchus, and Oral and Pharynx cancers. Analyzing the results based on sex and race, results show that nitrate in drinking water has a more preventative effect on the white population, irrespective of sex. For the Black and Hispanic population, the effect was pronounced in the male populations. Overall, the results show that, within the safe limits, nitrates in drinking water could have beneficial roles.
饮用水中的硝酸盐被认为会致癌。在当前基于元数据分析的研究中,我们调查了饮用水中硝酸盐浓度高的人群是否会增加癌症发病率。这一假设是用从疾病控制中心获得的县级癌症发病率数据和从各个供水系统的消费者信心报告中获得的硝酸盐数据来检验的。结果表明,饮用水中的硝酸盐浓度确实对肾癌和肾盂癌、喉癌、肺癌和支气管癌以及口腔癌和咽喉癌有预防作用。分析基于性别和种族的结果,结果表明,饮用水中的硝酸盐对白人人口具有更强的预防作用,而与性别无关。在黑人和西班牙裔人群中,这种影响在男性人群中尤为明显。总的来说,结果表明,在安全范围内,饮用水中的硝酸盐可能有有益的作用。
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引用次数: 0
Biocidal effect of Ergosterol-Propyl Ester Isolated From Ruta angustifolia (Pers.) on Spodopetra littoralis (Boisd.) 山茱萸麦角甾醇丙酯对沿海夜蛾的杀虫作用
Pub Date : 2020-06-01 DOI: 10.21608/CAT.2020.21801.1039
Mohamed Salama, H. Mead, H. Sabry, A. Abo-Ghalia, F. Semida
The toxic effects of some Ruta angustifolia extracts as a bio agent to control Spodoptera littoralis were investigated. Based on LC50 values, the acetonic extract was more effective than hexane and ethyl alcoholic ones. Ergosterol-propyl ester was isolated from the acetonic crud extract by thin layer chromatography and identified using Infra-Red spectrophotometer, Mass Spectrum and evaluated as a fraction for its larvicidal, biological, ultrastructure and biochemical effects on 4th instar S. littoralis larvae. The most prominent biological effects were presented as: prolongation in the total larval duration and a decrease in the percentages of survived larvae. The adult emergence percentages, longevity, fecundity, hatchability were significantly decreased compared to controls. Also, some deformation symptoms were recorded in larvae, pupae and adults. The ultrastructure alterations in S. littoralis 4th instar larvae were observed in cuticle microfilament in muscle myofilaments compared to control. Biochemical responses of the 4th instar S. littoralis larva has a decreas in the activities of both ALT and chitinase and elevation in AST of supernatant S. littoralis larvae compared to control.
研究了几种芦花提取物作为生物制剂对沿海夜蛾的毒性作用。从LC50值来看,丙酮提取物的抑菌效果优于己烷和乙醇提取物。采用薄层色谱法从丙酮粗提物中分离得到麦角甾醇-丙酯,并用红外分光光度计、质谱对其进行鉴定,并对其对4龄海蛾幼虫的杀虫、生物学、超微结构和生化效果进行评价。最显著的生物学效应表现为:延长幼虫总存续期,降低幼虫成活率。与对照相比,成虫羽化率、寿命、繁殖力、孵化率均显著降低。幼虫、蛹和成虫均有变形症状。与对照相比,滨夜蛾4龄幼虫肌肉肌丝角质层微丝的超微结构发生了变化。4龄海蛾幼虫的生化反应表明,与对照相比,海蛾上清幼虫的谷丙转氨酶和几丁质酶活性降低,谷丙转氨酶活性升高。
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引用次数: 1
Isolation and identification new bacterial strains isolated from different sources of Al-Rafidiyah oil field in Iraq 伊拉克Al-Rafidiyah油田不同来源新菌株的分离与鉴定
Pub Date : 2020-06-01 DOI: 10.21608/CAT.2020.23299.1041
A. Hamzah, Wijdan Hussein Abd-Alsahib, S. Mahdi
Abstract In this study, twenty two pure bacterial strains isolates were isolated that can use crude oil as a carbon source. They occured at different frequency ratios for each of oil-contaminated soil samples, the produced water, and the crude oil of the Al-Rafidiyah oil field (Basrah south of Iraq). Bacterial isolates were characterized and identified based on phenotypic properties and molecular techniques. Fourteen strains, belonging to three genera of Bacillus sp., Lysinibacillus sp. and Enterobacter sp., were isolated from oil-contaminated soil and nine strains, belonging to Bacillus sp., Lysinibacillus sp., Enterobacter sp. and Brevibacillus sp., were isolated from produced water. Five strains, belonging to two genera, Bacillus sp. and Pseudomonas sp., were isolated from crude oil. New twelve strains were recorded as new strains and deposited in GenBank include Bacillus cereus strain ASWISA1, Bacillus thuringiensis strain ASWISA2, Bacillus sonorensis strain ASWISA3, Bacillus cereus strain ASWISA4, Bacillus subtilis strain ASWISA5, Pseudomonas stutzeri strain ASWISA6, Bacillus subtilis strain ASWISA7, Bacillus cereus strain ASWISA8, Bacillus paramycoides strain ASWISA9, Bacillus paramycoides strain ASWISA10, Brevibacillus brevis strain ASWISA11, and Enterobacter cloacae strain ASWISA12.
摘要本研究分离了22株以原油为碳源的纯菌株。在受石油污染的土壤样品、采出水和Al-Rafidiyah油田(伊拉克南部巴士拉)的原油中,它们以不同的频率出现。根据表型特性和分子技术对细菌分离物进行了表征和鉴定。从石油污染土壤中分离到芽孢杆菌、溶菌杆菌和肠杆菌3属14株,从采出水中分离到芽孢杆菌、溶菌杆菌、肠杆菌和短杆菌9株。从原油中分离到芽孢杆菌属和假单胞菌属2属5株。其中,蜡样芽孢杆菌ASWISA1、苏云金芽孢杆菌ASWISA2、索诺芽孢杆菌ASWISA3、蜡样芽孢杆菌ASWISA4、枯草芽孢杆菌ASWISA5、stutzer假单胞菌ASWISA6、枯草芽孢杆菌ASWISA7、蜡样芽孢杆菌ASWISA8、副芽孢杆菌ASWISA9、副芽孢杆菌ASWISA10、短芽孢杆菌ASWISA11、阴沟肠杆菌ASWISA12。
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引用次数: 5
Coproscopy a Premordial Diagnostic Tool in Avian Parasitology Coproscopy是禽类寄生虫学的一种早期诊断工具
Pub Date : 2020-06-01 DOI: 10.21608/CAT.2020.23243.1040
A. Berghiche
Parasitic diseases are a problem that affects all poultry farms, whether large commercial or small backyard farms, where economic losses can be significant. In this study, a survey on intestinal parasites of chickens was carried out in the Souk Ahras region over a period of 6 months. The faeces of a total of 90 chickens collected from different farm types were examined by flotation to detect gastrointestinal parasites. The results obtained from these chickens showed that all the examined faeces were 100 % infected. The qualitative analysis showed a flocculation of helminths and protozoa’s oocytes across the taken chicken samples at different farms with different infection percentage. Broiler chicken reported infected with Ascaridia (50%); Heterakis (35%) and Eimeria (15%). The laying hen infected with Ascaridia, Heterakis and coccidial oocysts which represented by 33.33%, 33.33% and 33.34%, respectively. However, for the local chiken, Ascaridia: (40%) Heterakis (35%), Eimeria (15%), Syngamus (5%) and Capillaria (5%) were recorded. The high infection rate recorded in the study area suggested that an intensive poultry management system and regular chicken control should be held.
寄生虫病是一个影响所有家禽养殖场的问题,无论是大型商业养殖场还是小型后院养殖场,它们的经济损失可能很大。在本研究中,在Souk Ahras地区进行了为期6个月的鸡肠道寄生虫调查。采用浮选法对90只鸡的粪便进行了胃肠道寄生虫检测。从这些鸡身上获得的结果表明,所有被检查的粪便都被100%感染。定性分析表明,不同感染比例、不同养殖场采集的鸡标本中,寄生虫和原虫卵母细胞均存在絮凝现象。报告肉鸡感染蛔虫(50%);异角虫(35%)和艾美耳虫(15%)。蛋鸡感染蛔虫、异虫和球虫卵囊的比例分别为33.33%、33.33%和33.34%。而在地方鸡中,记录到蛔虫(40%)、异角虫(35%)、艾美耳虫(15%)、双胞虫(5%)和毛细虫(5%)。研究区感染率较高,应加强家禽集约化管理,定期控制鸡只。
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引用次数: 1
Benthic fauna and microbial communities as a bio-indicator for the characteristics of the marine environment in the Suez Bay , Red Sea , Egypt. 埃及红海苏伊士湾底栖动物和微生物群落作为海洋环境特征的生物指标。
Pub Date : 2020-06-01 DOI: 10.21608/CAT.2020.24899.1043
A. Belal, M. Kelany, Ahmed Elgendy, Moaz M. Hamed
Environmental variables were measured with benthic fauna and bacterial organisms to assess water quality and sediments in the Suez Bay. A total of 62 species belonging to five taxonomic groups (Polychaeta, Mollusca, Crustacea, Echinodermata and Urochordata) were collected from benthic fauna at thirteen stations extending from Summer (2019) to Winter (2020) along the intertidal zone of the Suez Bay. Polychaeta accounted for 38.71% and 47.3% of the total number of species and individuals, respectively. While, Urochordata represented by one species and 50 indivi./m². In the Suez Bay, bacterial populations are present in the water with an annual density of 21598 cfu / 100ml with an average of 1661.4. At the same time they are present in the sediments with a numerical density of 16331 cfu / g with an average of 1256.23. Dissolved oxygen (DO), Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) of tested samples ranged between 3.2 - 6.45 mgO2/l ; 0.995 -2.298 mg/l ; 2.298- 4.69 mg/l , respectively. This investigations revealed that, with the exception of the alien ; dominant and adherent rocks species (Spirobranchus kraussii and Brachidontes pharaonis), microbial components tend to increase their dominance, while bottom organisms were reduced during the entire study period. In addition ,this study indicated that there is a direct relationship with both salinity, dissolved oxygen and macro-benthic invertebrates, and at the same time there is an inverse relationship between them and bacterial counts, indicating thus a predominant effect of anthropogenic activities in the coastal area of Suez Bay.
利用底栖动物和细菌生物测量环境变量,以评估苏伊士湾的水质和沉积物。从夏季(2019年)到冬季(2020年),在苏伊士湾潮间带的13个站点采集了5个分类类群(多毛纲、软体动物、甲壳类、棘皮类和尾索类)的底栖动物62种。多毛纲占总种数的38.71%,占总个体数的47.3%。尾脊索类为1种,50只/m²。在苏伊士湾,水中的细菌种群年密度为21598 cfu / 100ml,平均为1661.4 cfu / 100ml。同时,它们在沉积物中的数值密度为16331 cfu / g,平均为1256.23。测试样品的溶解氧(DO)、生物需氧量(BOD)和化学需氧量(COD)在3.2 - 6.45 mgO2/l之间;0.995 -2.298 mg/l;分别为2.298 ~ 4.69 mg/l。调查显示,除外国人外;在整个研究期间,优势种和附着种(克氏螺枝和法老臂齿纲)的微生物成分优势度呈上升趋势,而底层生物的优势度呈下降趋势。此外,本研究表明,盐度、溶解氧和大型底栖无脊椎动物都与盐度、溶解氧和大型底栖无脊椎动物有直接关系,同时它们与细菌数量呈反比关系,表明苏伊士湾沿海地区受人为活动的影响较大。
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引用次数: 3
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International Journal on Environmental Sciences
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