检索结果-南通市图书馆

Influence of Bleaching Powder on the Quality of Giant Freshwater Prawn (Macrobrachium rosenbergii)

Food and Nutrition Sciences 2013年第9期4卷 1-8页

作者： Md. mizanur rahman Md. Shaheed Reza Mohammed Nurul Absar Khan Golam Mohammad Moshiur rahman Md. Nazrul Islam Md. Kamal Depart- ment of Post-Harvest Technology Chittagong Veterinary and Animal Sciences University Chittagong Bangladesh Department of Fisheries Technology Faculty of Fisheries Bangladesh Agricultural University Mymensingh Bangladesh Department of Fisheries Technology Faculty of Fisheries Patuakhali Science and Technology University Patuakhali Bangladesh WorldFish- Bangladesh & South Asia Office Dhaka Bangladesh.

Calcium hypochlorite commercially known as bleaching powder is used as a bleaching agent in shrimp processing industries in many countries and known to effect biochemical alteration in shrimp muscle. Studies were, therefore, undertaken to determine their effect in different concentrations viz., 10, 20, 30, 40 and 50 ppm with different time intervals on the quality of head-on, headless shell-on and peeled giant freshwater prawn (Macrobrachium rosenbergii) by determining biochemical and organoleptic aspects. Myofibrillar protein solubility of fresh head-on, headless shell-on and peeled samples were 90.5%, 90% and 88%, respectively indicating a gradual decrease in protein solubility with increasing concentration of bleaching powder. Decrease in protein solubility was also higher in samples kept at longer duration in different concentration of bleaching powder. At a given concentration of 50 ppm for 30 min treatment, the loss of myofibrillar protein was higher (26.14%) in peeled samples than those of head-on and headless shell-on samples (20.44% and 21.11%). Shelf life of bleaching powder treated prawn samples was found to be reduced to 4 - 5 days in iced condition compared to 6 - 7 days for control samples. Peeled samples were also found to be more susceptible to bleaching powder than that of head-on and headless shell-on samples.

关键词： Bleaching Powder Myofibrillar Protein Solubility Giant Freshwater Prawn Organoleptic Quality

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Estimate the Ventilation Effect from Wire Mesh Screen Assisted Solar Chimney

引用

Journal of Energy and Power Engineering 2018年第3期12卷 127-131页

作者： Md.mizanur rahman Mohd.Suffian Bin Misaran Mohd.Jamrye Bin Jamanun Ahmed Jawad Faculty of Engineering Universiti Malaysia SabahKota KinabaluSabah 88400Malaysia

In 1750s European houses, chimneys are used to remove smoke and dust particle from the fire place to the ambient. At present the applications of chimneys are extended for house ventilation, which is known as solar chimney assisted ventilation system. In this paper, the effect of wire mesh screen on chimney assisted ventilation system is studied and presented. Natural draft chimney integrated with solar heating system that is known as solar chimney, can be used for building ventilation. Number of research works had been conducted on different types of solar chimney to enhance the building ventilation performance. In this study a solar chimney model is designed and modified with wire mesh screens. An electric heating system is installed in the models to replace the solar absorber in the solar chimney. The airflow rates and the exit air temperatures are also measured and compared for normal chimney and modified chimneys under different heat loads. The performances of the chimneys are evaluated to determine the effects of wire mesh screen on the solar chimney. Experimental results indicated the solar chimney model with 0.64 mm × 0.64 mm pore size wire mesh screen at the exit is able to enhance velocity and the exit air temperature are about 54% and 41%, respectively. It has been concluded that the wire mesh screen has significant effect of model solar chimney and is able to enhance the performance.

关键词： Solar chimney natural ventilation wire mesh screen.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Numerical Analysis of Thermal Convection in a CPU Chassis

引用

Open Journal of Modelling and Simulation 2021年第1期9卷 43-58页

作者： M. Z. I. Bangalee Md. mizanur rahman M. Ferdows M. S. Islam Department of Applied Mathematics University of Dhaka Dhaka Bangladesh Research Group of Fluid Flow Modeling and Simulation Department Applied Mathematics University of Dhaka Dhaka Bangladesh Department of Mathematics University of Dhaka Dhaka Bangladesh

Flow distribution and the effects of different boundary conditions are achieved for a steady-state conjugate (Conduction & Convection) heat transfer process. A plate fin heat sink with horizontal fin orientation along with a computer chassis is numerically investigated and simulated using software ANSYS CFX. Fin orientation of a heat sink changes the direction of fluid flow inside the chassis. For predicting turbulence of the flow inside the domain, a two-equation based k-ε turbulence model is chosen. The Reynolds number based on inflow velocity and geometry is found 4.2 × 103 that indicates that the flow is turbulent inside the chassis. To get proper thermal cooling, the optimum velocity ratio of inlet/outlet, dimension of inlet/outlet and different positions of outlet on the back sidewall of the chassis are predicted. Aspect velocity ratio between the inlet airflow and the outlet airflow has an effect on the steadiness of the flow. Mass flow rate depends on the dimension of the inlet/outlet. The horizontal fin orientation with 1:

关键词： Reynolds Number Turbulence Model Heat Sink CPU Chassis Conduction Convection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Organic Amendments with Chemical Fertilizers Improve Soil Fertility and Microbial Biomass in Rice-Rice-Rice Triple Crops Cropping Systems

引用

Open Journal of Soil Science 2017年第5期7卷 87-100页

作者： Md. Farid Ahammed Anik Md. mizanur rahman G. K. M. Mustafizur rahman Md. Khairul Alam Mahammad Shariful Islam Mst Fatima Khatun Soil Science Division Bangladesh Agricultural Research Institute Gazipur Bangladesh Department of Soil Science Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh School of Veterinary and Life Sciences Murdoch University Perth Western Australia

Medium-term changes in the labile nutrient pool of microbial biomass carbon (MBC) and nitrogen (MBN) resulting from organic manure application in rice (Oryza sativa L.)-based triple cropping systems have been poorly studied. Therefore, the effects of organic materials on the soil physico-chemical properties and microbial biomass in rice fields were investigated at Bangabandhu Sheikh Mujibur rahman Agricultural University, Bangladesh, from April 2010 to December 2012. Five treatments (control, cow dung, poultry manure, rice straw, and chemical fertilizer) were laid out in a randomized complete block design with four replications. The organic residues (2 t C ha-1) were applied 7 days before transplanting and were combined with inorganic fertilizers, following integrated plant nutrition systems. This paper presents the results from the last of the five consecutive rice growing seasons. All of the organic residues increased the pH, and organic C, N, P, and K contents of the soil. However, poultry manure was more efficient in increasing soil fertility than cow dung and rice straw, resulting in a significant increase in P from 22 mg·kg-1 to 63 mg·kg-1 at crop harvest. All of the organic residues also increased the soil water holding capacity and decreased bulk density. Furthermore, poultry manure resulted in significantly higher microbial biomass C (432 mg·kg-1;P < 0.05) and N (31.60 mg·kg-1;P < 0.05) levels in the soil at crop harvest, followed by cow dung and rice straw. These findings indicate that the regular application of organic residues and manures will help to enhance soil fertility and production sustainability.

关键词： Integrated Plant Nutrition Systems (IPNS) Poultry Manure Rice Straw Water Holding Capacity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Status and Constrain for Mechanization of Rice Harvesting System in Bangladesh

引用

Agricultural Sciences 2017年第6期8卷 492-506页

作者： Bidhan Chandra Nath Yo-Sang Nam Md. Durrul Huda Md. mizanur rahman Panna Ali Subrata Paul Farm Machinery and Postharvest Technology Division Bangladesh Rice Research Institute Gazipur Bangladesh TYM R&D Center Gongju South Korea Entomology Division Bangladesh Rice Research Institute Gazipur Bangladesh

To know the position, problems and suggestion of harvest mechanization of rice, the study conducted in 21 upzillas under seven regions (Dhaka, Mymensingh, Sylhet, Comilla, Bogra, Rajshahi and Rangpur) based on different agro-climatic condition and cropping intensity and 126 farmers participated in the interview. For collecting data, a structured questionnaire was used and statistical analysis of the collected data was carried out. In study area, the average cultivable area was 225 to 1239 decimal (1 decimal = 40 m2) and 97.60% farmer reaping by sickle and only 0.80% used combine harvester. Cut paddy transported by head (13.49%), shoulders (12.7%) or both of them of 11.11% farmer and 44.44% of farmers used small truck or field threshed. Threshing was mainly done using (49.21%) closed drum thresher and open drum thresher (26.20%), likewise 1 of 126 farmer use head-feed combine harvester. The study area, most farmers (37.3%) used kula for the cleaning of rice, but only 8.74% of farmers used winnower. In considerable amount, 80.95% of farmers had machinery, while the remaining (19.05%) did not have machines. Farmers agreed that harvesting was a labor-intensive method (35.71%) and time consuming (28.57%). Transporting of harvested paddy was dangerous and painful for head, shoulder, hand, waist, backbone, leg, etc. With mechanization and the introduction of machinery, 40.48% of farmers identified the main ceiling as the price of the machine and information/lack of credit system (21.43%). In survey area, most farmers (36.51%) identified the vital advantage of mechanized harvesting as lower labor requirement, while 21.43% of farmers said that a lower loss of rice. All farmers who participated in the interview expressed their need for machinery and mentioned agricultural credit with easy terms and conditions, subsidy for buying machinery and the ensuring of a fair market price for their rice.

关键词： Crop Harvesting Mechanization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Radiological Concentration Distribution of 134Cs and 137Cs Due to a Hypothetical Accident of TRIGA Research Reactor

引用

World Journal of Nuclear Science and Technology 2021年第3期11卷 119-131页

作者： Arif Jahan Sarawer M. Ajijul Hoq M. Abu Khaer M. Shafiqul Islam M. Mominur rahman M. Tareque Chowdhury M. mizanur rahman Department of Physics Jahangirnagar University of Bangladesh Dhaka Bangladesh Institute of Energy Science Atomic Energy Research Establishment Bangladesh Atomic Energy Commission Dhaka Bangladesh

The assessment of the radiological concentration of 134Cs and 137Cs owing to hypothetical accident of TRIGA Mark-II research Reactor at AERE, Savar, Bangladesh is presented here in this work. The concentration of 134Cs and 137Cs was estimated in different pathways consisting of the ingestion of plants, milk, and meat. The highest air concentration has been determined at 65 m distance from the core of the reactor. The maximum concentration passed off without delay simply after the accident in various directions. Local meteorological information such as average wind velocity and wind frequency were analyzed. Considering all directions, the highest concentration has been observed in the “S” direction. The concentrations of 134Cs and 137Cs were determined in ground, vegetation, milk and meat. The concentration of 137Cs is investigated to be higher than the 134Cs. The concentration of 134Cs and 137Cs was found to be lower in vegetation, milk, and meat than that of ground concentration. Overall, in this study, the concentration in meat has been investigated to be lower. In case of a reactor accident, the concentration assessment due to the ingestion of vegetables, milk, and meat will be a valuable guide for insuring radiological protection across the research reactor at AERE, Savar, Bangladesh.

关键词： Concentration Hypothetical Accident Pathway Radiological Protection TRIGA Mark-II

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Techno-Economic Feasibility of Zoomlion Combine Harvester in Haor Areas of Bangladesh

引用

Agricultural Sciences 2020年第12期11卷 1170-1185页

作者： A. K. M. Saiful Islam Md. Ashraful Alam Muhammad Ashik-E-Rabbani Md. Samiul Bashir Md. mizanur rahman Bangladesh Rice Research Institute Dhaka Bangladesh Bangladesh Agricultural University Mymensingh Bangladesh

Haor represents the food basket of Bangladesh and rice is the only crop grown once a year. Harvesting of rice is labor-intensive works and required migrated labor to complete the harvesting works. Mechanical intervention of rice harvesting is urgently needed to increase the productivity. The proper knowledge of economic valuation and operational necessities needs to use of combine harvesters. Research objective was selected to test the technical and economic analysis of Zoomlion rice combine harvester (which is originally developed in China) in Maisherkandi, Mithamain Upazila under Kishoregonj district. The above-mentioned areas are representing haor areas of Bangladesh. Based on the straight-line method, fixed cost items which are machine purchase price, shelter, tax, and insurance were calculated. During the operation of the combine harvester variable cost items such as maintenance and repair, fuel, oil, drivers and guidance were collected. The breakeven point was calculated in terms of the hectares that must be harvested yearly to cover fixed annual costs;and the payback period. Harvesting speed ranged from 1.23 - 3.20 km∙hr−1. The field capacity of harvester was obtained 0.15 ha∙hr−1 and consumed fuel of up to 32 L∙ha−1. Field sizes

关键词： Forward Speed Plot Length Field Size Field Capacity Annual Use Break-Even Area

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Formulation and In-VitroRelease Pattern Study of Gliclazide Matrix Tablet

引用

Pharmacology & Pharmacy 2015年第3期6卷 125-131页

作者： Tanbir Ahammad Marium Begum A. F. M. Towheedur rahman Moynul Hasan Saikat Ranjan Paul Shaila Eamen Md. Iftekhar Hussain Md. Hazrat Ali Md. Ashraful Islam Mohammad mizanur rahman Mamunur Rashid Department of Pharmacy BRAC University Dhaka Bangladesh Department of Pharmacy Primeasia University Dhaka Bangladesh Department of Pharmaceutical Sciences North South University Dhaka Bangladesh Department of Pharmacy Dhaka International University Dhaka Bangladesh Department of Pharmacy Southeast University Dhaka Bangladesh Department of Pharmacy Jahangirnagar University Dhaka Bangladesh Department of Pharmacy International Islamic University of Chittagong Chittagong Bang-ladesh Department of Biomedical Imaging Faculty of Bioscience Abo Akademi University Turku Finland Department of Pharmacy University of Rajshshi Rajshahi Bangladesh

In current decade, pharmaceutical industries of Bangladesh are giving much emphasize on the formulation of time release preparation to treat various chronic diseases in order to decrease the frequency of administration and to improve patient compliance. Objectives: The objective of this investigation is to design and evaluate sustained release matrix tablet of Gliclazide by direct compression method employing polymers of hydroxypropylmethyl cellulose (HPMC) derivatives (K15M CR and K4M CR) and to select the optimized formulations and compression process by performing a comparative release kinetic study with a reference product, Diamicron MR (one of the worldwide brand of Gliclazide sustain released tablet manufactured by Servier one of the French pharmaceutical company) tablet. Methods: Release kinetics of Gliclazide matrix tablets were determined using USP paddle method at Phosphate buffer (pH 7.4). The release mechanism was explored and explained with zero order, first order, Higuchi and Korsmeyer model. Result: It is found that formulation with lower polymeric concentration follows Higuchi release kinetics and that the formulation with higher concentration best fits with zero order release kinetics. Among the formulations, F1 and F6 show almost similar dissolution profile with Diamicron MR Tablet, which can be suitable candidates for further in-vivo bioequivalence study. Conclusion: Findings of this investigation suggest that F1 and F6 formulations are potential candidates for further bioequivalence study among other formulations.

关键词： Gliclazide Sustained Release Methocel K15M CR Methocel K4M CR In-Vitro Bioequivalence

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Awareness of Chronic Kidney Disease among Patients Attending Tertiary Care Hospital in Bangladesh

引用

Journal of Biosciences and Medicines 2019年第8期7卷 106-118页

作者： Ferdous Jahan A. K. M. Shahidur rahman Tania Mahbub Mesbah Uddin Noman Yeasmin Akter Mohammed mizanur Rahaman K. B. M. Hadiuzzaman M. A. Jalil Chowdhury Department of Nephrology Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh Department of Nephrology United Hospital Limited Dhaka Bangladesh Department of Nephrology M Abdur Rahim Medical College Dinajpur Bangladesh Department of Gynecology and Obstetrics Combined Military Hospital (CMH) Dhaka Bangladesh Department of Cardiology Narail Sadar Hospital Narail Bangladesh Department of Medicine Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh

Background: Patients with chronic kidney disease (CKD) are at increased risk of morbidity & mortality. Educational interventions aimed at empowering patients are successful in chronic disease management including CKD. Objective: To explore the awareness regarding CKD among patients attending in a tertiary care hospital in Bangladesh. Methodology: This was a descriptive observational study, which includes 100 adult patients attending the department of Medicine in Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh from January 2013 to June 2013. Data were collected on a pre-tested questionnaire by face-to-face interview to investigate awareness toward: 1) basic knowledge of personal health;2) perceptions of factors increasing the risk of CKD;3) knowledge of therapies to slow CKD progression;4) perceptions of CKD increasing the risk of other medical conditions and 5) demographic information. Main outcome variables were demographic parameters, socio-economic status and awareness about chronic kidney disease. Data were analyzed and compared by statistical tests. Results: Almost one third (32.0%) respondents were in 3rd decade and male to female ratio was 1:1.5. Majority (43.0%) patients came from lower-middle income family. In all age groups, the majority (60%) respondents had low knowledge of CKD. Among the study population, 44.0% believe that smoking increases risk of CKD;42.0% believe that restricting salt intake reduces the progression of CKD;34.0% mention that CKD increases the risk for hypertension and 82.0% mention that renal transplantation is the treatment of choice in CKD. Among the participants, 32.8% had knowledge of increasing risk factor of CKD, 30.8% had knowledge of the method of slow progression of CKD, 30.3% had knowledge of conditions for increase risk of CKD and 41.7% respondent had knowledge of treatment of CKD. Conclusion: Most of the study participants had inadequate knowledge of CKD. Lack of CKD screening and educational progra

关键词： Awareness Chronic Kidney Disease Patient Knowledge Patient Perception

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Simulating Nitrogen and Irrigation Effects on Wheat Production in Bangladesh under Changing Climate

引用

American Journal of Plant Sciences 2017年第7期8卷 1593-1606页

作者： Ranjit Sen Apurba Kanti Choudhury Sohela Akhter Sheikh Ishtiaque Md. Abu Hena Sorwar Jahan Faruque Ahmed Jatish Chandra Biswas Md. Maniruzzaman Md. Main Uddin Miah Md. mizanur rahman Naveen Kalra Md. Abdul Aziz A. S. M. Mahbubur rahman Khan Bangladesh Agricultural Research Institute Gazipur Bangladesh Bangladesh Rice Research Institute Gazipur Bangladesh Bangabandhu Sheikh Mujibur rahman Agricultural University Gazipur Bangladesh CRP-II Project Krishi Gobeshona Foundation (KGF) Dhaka Bangladesh

Climate change impacts are visible in Bangladesh which requires adoption of judicious crop management practices for sustainable agriculture. Crop simulation models are effective in this regard and can be used for optimizing water and nitrogen inputs for maximization of wheat yields. Two field studies were conducted at Bangladesh Agricultural Research Institute (BARI) for evaluating the effect of increased temperature on wheat production under variable water and N rates, through the use of DSSAT v4.6 model. Thirty years historic weather data and BARI Gom-26 wheat-cultivar coefficients, as generated through use of GLUE of DSSAT model, were used for evaluating the impact of temperature rise with variable rates of irrigation water and nitrogen. The effects of four levels of nitrogen (0, 40, 80 and 120 kg ha-1) and four irrigation levels [0 (no irrigation), 1, 2 and 3] on wheat yield were evaluated under 0°C, 1°C, 2°C and 3°C rise in temperature. Simulation results indicated that wheat yield increased with increase in nitrogen application rate, but decreased with the temperature rise. Crop growing duration was reduced by about five days for each degree rise in temperature, irrespective of levels of irrigation water and nitrogen-rates. In general, there was yield reduction of 8.13, 16.77 and 24.97 % with increased temperature of 1°C, 2°C and 3°C, respectively, when compared with no temperature rise treatment. For interaction of temperature rise-N dose, the magnitude of yield decline under temperature rise was higher with increased dose of N. Agronomic N use efficiency at different N rates and temperature rise level were calculated. N use efficiency decreases with the increase in temperature rise and the highest (29.95 kg grain kg-1 N) was obtained from 40 kg N ha-1 treated plot with 0°C temperature rise i.e. existing atmospheric temperature. Simulation results indicated increase in wheat yield with higher levels of irrigation water, and int

关键词： Climate Change Wheat Temperature Rise Irrigation Nitrogen Bangladesh

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：