Groundwater Dynamics and Balance in the Western Part of Greater Kushtia District of Bangladesh

M. Nozibul Haque,Mumnunul Keramat,Shamsuddin Shahid,Morteza Mohsenipour,Xiao-Jun Wang 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.5

Groundwater dynamics and balance have been studied for the assessment of groundwater abstraction status in the western part of grater Kushtia district, Bangladesh using data from 28 groundwater level monitoring wells, 180 lithologs, and one rainfall station for the period 2001-2007. The groundwater levels in the study area were found to vary at a depth between 0.0 m and 9.34 m. During peak season of groundwater abstraction (pre-monsoon), the maximum and minimum groundwater level with respect to mean sea level (MSL) were found to vary from 9.36 to 11.3 m and 2.3 to 4.9 m, respectively, whereas in post-monsoon these values were found to vary from 13.2 to 15.6 m and 7.6 to 9.6 m, respectively. The groundwater flow in the area was driven by topography, directed from the northwest to the southeast. This study revealed a declining trend in groundwater table both in pre- and post-monsoon seasons in the area. It has also been noticed that the rate of declination is increasing with time. The volumetric analysis of groundwater also showed a net negative balance, which indicates overexploitation of groundwater. The study concluded that the unsustainable utilization of groundwater resources in the study area has caused depletion in groundwater table.

텅스텐 추출공정에 관한 고찰

M . Shamsuddin,손홍용 ( H,Y . Sohn ) 한국화학공학회 1982 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.20 No.5

Amongst various refractory metals, tungsten has the greatest potentiality for high temperature applications due to its exceptional strength to weight ratio at temperatures above 1370℃(2500。F). During the past three decades significant research efforts have been directed towards the improvement of the conventional methods of tungsten extraction and to devop new processes to reduce the number of steps from ore to metallic tungsten. In this paper geological occurrence of tungsten minerals and principles of benefication methods are outlined. The commercial processes of extraction from wolframite and scheelite and different approaches to the reduction of tungstic oxide are discussed. Methods of recovery from scrap and the current research efforts are also reviewed.

Dose-related Effects of Follicle Stimulating Hormone on Superovulation in Indigenous Cows of Bangladesh

Hossein, M.S.,Shamsuddin, M.,Bhuiyan, M.M.U.,Khan, A.H.M.S.I.,Bari, F.Y. 韓國受精卵移植學會 2002 한국동물생명공학회지 Vol.17 No.2

The present study aimed at determining the effective dose of Folltropin, a follicle timulating hormone (FSH), on superovulation in indigenous cows of Bangladesh. Fifteen regularly cycling 5~7 years old dry cows, weighing 200~250 kg with 2.5~3.0 body condition scores (BCS) were divided into three groups (n=5). Individual groups were superovulated with 100, 200 or 300 mg of Folltropin per animal. The superovulation treatment was initiated at Day 10 or Day 11 of the estrous cycle (Day 0=day of estrus). Alfaprostol (6 mg) was injected to each cow 72 h after the initiation of superovulation treatment to induce eestrus. After confirming standing estrus, the cows were inseminated 2~3 times, 12 h apart, depending on the duration of estrus. At Day 6 or Day 7, individual horns of the uterus were flushed with 150~200 of phosphate buffered saline supplemented with BSA (0.2%), penicillin (100 IU/) and streptomycin (100 /) using a two-way foley catheter. The embryos were concentrated, removing the excess medium through an embryo filter, and identified under a stereomicroscope. The identified embryos were collected, washed four times, evaluated and graded as excellent, good, fair or poor. The excellent, good and fair embryos were considered as transferable quality embryos. The mean (range). numbers of embryos collected vs. transferable quality embryos far 100, 200 and 300 mg of Folltropin were 4.5 (1~10) vs. 3.5 (1~8); 2.5 (1~4) vs. 1 (0~2) and 0.0 (0~0) vs. 0.0 (0~0), respectively, Folltropin at a dose of 100 or 200 mg produced suitable ovarian stimulation for superovulation in indigenous zebu cows of Bangladesh. A dose of 300 mg or more Folltropin consistently caused preovulatory corpora lutea formation in the ovaries and resulted in zero embryo recovery.

Articles : The Role of Foreign Direct Investment in Canada`s Demand for Imports: 1971-1982

( A. K. M. Shamsul Alam ),( A. F. M. Shamsuddin ) 세종대학교 경제통합연구소 1988 Journal of Economic Integration Vol.3 No.2

In this paper we include a "foreign ownership" variable in the traditional and partial adjustment import demand functions and examine the role of "foreign direct investment" in Canada`s demand for imports. We examine the stochastic process generating the error structure of the estimated models and adopt appropriate techniques for estimation purposes. The extent to which the adjustment between actual and long run demand for imports occurs in both models is also examined, In the process, we comapre the relative performance of the two models in explaining the demand for imports in Canada over the sample period 1971-1982. The results provide strong support for the partial adjustment model and suggest a positive and significant role of the "foreign control variable" in the Canadian demand Jar improts.

Factors Affecting the Survival of Frozen Thawed Bovine In Vitro Produced Blastocysts

Gustafsson, H.,Larsson, B.,Shamsuddin, M.,Jaakma, U.,Emanuelson, U. Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.1

Factors Affecting the Survival of Frozen Thawed Bovine In Vitro Produced Blastocysts. The effect of some factors on the post-thaw survival of a total of 240 in vitro produced bovine blastocysts was investigated using logistic regression analysis. The explanatory variables tested were: type of culture medium before freezing (TCM 199 supplemented with BSA, BSAITS (BSA+insulin+transferrin+selenium), ECS (estrous cow serum) with or without BOEC (bovine oviductal epithelial cells), age of the blastocyst (Day 7, Day 8+9), morphological appearance before freezing (distinct=Q1 or indistinct=Q2 inner cell mass) and type of cryoprotectant (glycerol, 1.0 M or ethylene glycol, 1.6 M). The survival after thawing based on the post-thaw quality and the development after co-culture with BOEC for 24 and 48 hours. Day 7 blastocysts had an almost three times better chance of survival than Day 8+9 blastocysts. Q1, Day 8+9 blastocysts had higher odds to survive after 48 hours in culture than Q2 blastocysts (p<0.05). Blastocysts produced in BSAITS medium had the best chances of survival; however, the odds were not always significant. Blastocysts frozen in glycerol had a better post-thaw quality rating than those frozen in ethylene glycol; however, the difference in post-thaw development at culture was not significant. The relationship between post-thaw quality and post-thaw development at culture was significant (p<0.05). The developmental stage and/or age of the embryo and culture medium where development up to blastocyst takes place affect the post-thaw survival of the bovine embryos.

The Role of Foreign Direct Investment in Canada's Demand for Imports : 1971-1982

Alam, A. K. M. Shamsul,Shamsuddin, A. F. M. 세종대학교 국제경제연구소 1988 Journal of Economic Integration Vol.3 No.2

In this paper we include a "foreign ownership" variable in the traditional and partial adjustment import demand function and examine the role of "foreign direct investment" in Canada's demand for imports. We examine the stochastic process generating the error structure of the estimated models and adopt appropriate techniques for estimation purposes. The extent to which the adjustment between actual and long run demand for imports occurs in both models is also examined. In the process, we comapre the relative performance of the two models in explaining the demand for imports in Canada over the sample period 1971-1982. The results provide strong support for the partial adjustment model and suggest a positive and significant role of the "foreign control variable" in the Canadian demand for improts.

Enhancement of antimicrobial properties of shoe lining leather using chitosan in leather finishing

Mahmud, Yead,Uddin, Nizam,Acter, Thamina,Uddin, Md. Minhaz,Chowdhury, A.M. Sarwaruddin,Bari, Md. Latiful,Mustafa, Ahmad Ismail,Shamsuddin, Sayed Md. Techno-Press 2020 Advances in materials research Vol.9 No.3

In this study, a chitosan based coating method was developed and applied on the shoe lining leather surface for evaluating its inhibition to bacterial and fungal attacks. At first, chitosan was prepared from raw prawn shells and then the prepared chitosan solution was applied onto the leather surface. Secondly, the characterization of the prepared chitosan and chitosan treated leather was performed by solubility test, ATR-FTIR, XRD pattern, SEM and TGA. Evaluation of antimicrobial efficacy of chitosan was assessed against two gram positive, two gram negative bacteria and a reputed fungi by agar diffusion test. The results of this study demonstrated that chitosan took place in both the surface of collagen fibres and inside the collagen matrix of crust leather. The chitosan showed strong antimicrobial activities against all the tested microorganisms and the inhibition increased with increasing percentage of chitosan. Therefore, the prepared chitosan in this study can be an environment friendly biocide, which functions simultaneously against different spoilage bacteria and fungi on the finished leather surface. Thus by using the prepared chitosan in shoe lining leather, the possibility of microbial attack during shoe wearing can be minimized which is one of the important hygienic requirements of footwear.

Structural, dielectric and photoluminescence properties of co-precipitated Zn-doped SnO2 nanoparticles

P.P. Sahay,R.K. Mishra,S.N. Pandey,S. Jha,M. Shamsuddin 한국물리학회 2013 Current Applied Physics Vol.13 No.3

Zn-doped SnO2 nanoparticles were prepared by the chemical co-precipitation route. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses of these prepared nanoparticles were carried out for structural and morphological studies. All the samples have been found to have tetragonal rutile structure of the polycrystalline SnO2 having crystallite size in the range 13e25 nm. TEM micrographs show agglomeration of nanoparticles in all the samples. At a particular temperature, the dielectric constant of all the samples has been found to decrease with increasing frequencies which may be due to rapid polarization processes occurring in SnO2 nanoparticles. The ac conductivity, s (u), has been found to vary with frequency according to the relation s (u) f uS. The value of S has been found to be temperature dependent, decreasing with increasing frequency which suggests that a hopping process is the most likely conduction mechanism in these nanoparticles. The room temperature photoluminescence (PL) spectra of the undoped and Zn-doped SnO2 nanoparticles consist of the near bandedge ultraviolet (UV) emission and the defect related visible emissions. The origin of emission peaks in the visible region is attributed to oxygen-related defects that are introduced during growth.

Biochemical Attributes of Mature Female Gonads of Different Strains and Hybrid of Mulberry Silkmoth, Bombyx mori L.(Lepidoptera : Bombycidae)

Saha, A. K.,Chaudhuri, A.,Krishnan, N.,Sengupta, A. K.,Shamsuddin, M.,Sen, S. K.,Saratchandra, B. 한국잠사학회 1998 한국잠사곤충학회지 Vol.40 No.1

One indigenous polyvoltine strain (Nistari) and two bivoltine strains viz. P5, and NB18, along with one bivoltine hybrid (P5 X NB18) were subjected for studies on the differences on some physiologically important biomolecules like protein, nucleic acids and cholesterol. Ovarian protein and RNA content remained significantly high in the bivoltine races and their hybrid over multivoltine breed, while, DNA and cholesterol content remained significantly low in all the breeds and the hybrid as compared to Nistari strain. However, the ovarian weight was higher in both the bivoltine breeds and their hybrid than that of Nistnri. Higher ovarian weight together with more protein and RNA concentrations reflect the preparatory phase for production of diapausing eggs by the bivoltines. This is indicated by the production of more number of eggs by the bivoltine silkmoths and their hybrid. The variations in biochemical parameters studied herein, thus establish a distinct difference in the overt reproductive physioiogy between multivoltine and bivoltine silkworms.

Assessment of Spatiotemporal Variability of Meteorological Droughts in Northern Iraq Using Satellite Rainfall Data

Hafed Qasem Ahmad,Samira A. Kamaruddin,Sobri B. Harun,Nadhir Al-Ansari,Shamsuddin Shahid,Ruqaya M. Jasim 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.11

The absence of a dense rainfall monitoring network and longer period data are the major hindrances of hydroclimatic study in arid and semi-arid regions. An attempt has been made for the evaluation of spatiotemporal changes in droughts at the northern semi-arid region of Iraq for the period 1981 − 2018 using high-resolution (0.05°) precipitation data of Climate Hazards Group Infrared Precipitation with Stations (CHIRPS). The performance of CHIRPS in replicating rainfall and Standard Precipitation Index (SPI) for different timescales at eleven locations for the available period of observation data (2000 − 2014) was evaluated. The SPI was also used to estimate drought frequency and evaluate drought trends at all the CHIRPS grid points. A modified version of the non-parametric Mann-Kendall (MK) test was employed for a robust evaluation of the spatial distribution of temporal trends in droughts. The results showed a good ability of CHIRPS in reconstructing observed SPI with a correlation coefficient ranged from 0.64 to 0.87, BIAS between 1.05 and 1.81, Nash-Sutcliff efficiency from 0.39 to 0.55, and Willmott Index between 0.67 and 0.79. The CHIRPS also able to reconstruct the time series and probability distribution of observed SPI reasonably. Spatial distribution of droughts revealed a higher frequency of droughts of all categories and timescales in the east and north of Northern Iraq, mainly due to high rainfall variance. The MK test revealed a reduction in 6- and 12-month droughts in the northwest and an intensification at a few northeastern grids. It indicates droughts became more recurrent in the already drought-prone region and lessened in a less drought-prone region.