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Search Results: 1 - 10 of 13617 matches for " Nur Mohammad Talukder "
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Monitoring the Residue Level of Three Selected Pesticides in Red Amaranth
Jahan Ara Khatoon,Md. Shariful Islam,Nur Mohammad Talukder,Md. Afzal Hossain
Journal of Biological Sciences , 2004,
Abstract: A study was undertaken in the Department of Biochemistry, Bangladesh Agricultural University, Mymensingh to monitor the level of three selected pesticides at various dose levels. In this case edible part of red amaranth was extracted and analyzed for applied pesticide residues. It was found that after one day 0.0065 μg of cypermethrin retained per g of plant sample, which was 0.23% of the applied dose. While on the 3rd day of spray the level of residue was found to decrease (0.0024 μg g1-1) which accounted for 0.085% of the applied dose. In case of higher dose applied, the residue level of chlorpyrifos was 0.0173 μg g-1 whereas the level increased to 0.0237 μg g1-1 on 3rd day of application. It seemed that the uptake of chlorpyrifos by red amaranth from soil and its accumulation therein was higher on 3rd day of application. The residue level of carbofuran was very low both at 1st and 3rd day of application. However, an increasing trend of incorporation was observed on 3rd day of application. It is remarkable to note that when higher level of chlorpyrifos and carbofuran were jointly applied, the amount of chlorpyrifos as residue increased but the level of carbofuran decreased. Finally carbofuran could not be traced after 72 h of joint application. So study indicated that chlorpyrifos might exert antagonistic effect on the uptake/accumulation of carbofuran in plant system.
Murder: A Critical Analysis of the Common Law Definition  [PDF]
Mohammad Belayet Hossain, Saida Talukder Rahi
Beijing Law Review (BLR) , 2018, DOI: 10.4236/blr.2018.93028
Abstract: English Criminal law provides a range of offences that recognizes the sanctity of life by prohibiting the unlawful killing of a human being. The generic term “homicide” covers offences such as murder, manslaughter and causing death by dangerous driving. What all homicides have in common is the unlawful killing of a human being; what distinguishes them is either the state of mind of the defendant who has caused death, or the defense available. This article shall critically analyze the common law definition of murder in various criminal homicide cases to find out if any concrete common law definition could be established. It will be seen throughout this article that though criminal law throws up many exceptions to this general proportion, there is no fixed common law definition of murder. This article shall prompt the question whether the legislature should rethink the forms of criminal homicide and the judiciary reconsiders some of the definitions of the mens rea words produced in recent years.
Biochemical Traits and Physico-Chemical Attributes of Aromatic-Fine Rice in Relation to Yield Potential  [PDF]
M. Abdul Baset Mia, Mira Rani Das, Muhammad Kamruzzaman, Nur Muhammad Talukder
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.312A219
Abstract:

Aromatic rice has great potential to attract rice consumer for its taste and deliciousness, and high price to boost up the economic condition of the rice grower in the developing countries. A field experiment was conducted to evaluate the morpho-physiological and biochemical attributes in relation to yield potentials of fine aromatic rice varieties in Bangladesh. Two aromatic fine rice cultivars, Ukunmadhu and Kataribough (local land races), one hybridized variety BRRIdhan-32 and one mutant variety Binasail were used in the experiment. The results revealed that rice varieties BRRIdhan-32 and Binasail showed the greater number of branches of panicle, grain size, grain yield and harvest index as compared to aromatic varieties. On the other hand, aromatic rice showed taller plant stature, more tiller, plant biomass and larger panicle but lower number of primary and secondary branches, grain size, yield and harvest index. The biochemical attributes namely chlorophyll and soluble protein content were higher at vegetative stage as compared to panicle initiation and flowering stages. The aromatic rice Kataribhough and Ukonmondhu contained higher amount of total free amino acid as compared to that of Binasail and BRRIdhan32. Other biochemical parameters namely nitrate reductase activity (NRA), total sugar and free amino acid contents were higher at flowering stage compared to those contained at tillering and panicle initiation stages. Physico-chemical properties of grain viz. length, breadth, L/B ratio, nitrogen (%) and protein (%) were significantly higher in fine rice as compared to aromatic rice. From the results it may be concluded that the high yielding varieties were more efficient in transfer of photosynthate to the grain i.e. economic yield and that is why BRRIdhan32 recorded the highest yield. Poor yield in Ukonmodhu and Kataribhough was due to low harvest index indicating minimum translocation of assimilates to the grains.

Identification of Aflatoxigenic Fungi and Detection of Their Aflatoxin in Red Chilli (Capsicum annuum) Samples Using Direct Cultural Method and HPLC  [PDF]
Md. Nur Hossain, Asma Talukder, Farhana Afroze, Md. Matiur Rahim, Shamima Begum, Md. Zahurul Haque, Monzur Morshed Ahmed
Advances in Microbiology (AiM) , 2018, DOI: 10.4236/aim.2018.81004
Abstract: Aflatoxins are the potential lethal toxin produced by Aspergillus sp. important health hazard throughout the world. In this study, 26 Aspergillus sp. have been isolated from 50 samples of red chilli collected throughout the country. These 26 isolates were grown primarily on agar media to identify the aflatoxin producing species. It is possible to distinguish A. flavus strains from other Aspergillus sp. developing orange colour on the reverse of the plates. The Coconut Cream Agar (CCA) is used to detect aflatoxin producer strains having blue fluorescence when exposed to a UV-light. Several other media were used for morphological characteristics of Aspergillus sp. Out of 26 isolates, four isolates were confirmed as Aspergillus sp. These isolates were subjected to cross contamination with freshly ground, sterile maize and after 15 days of incubation the contaminated maize were analyzed by HPLC and found aflatoxin in each of the sample containing 186 ppb (max.). This study was conducted to assay the ability to produce aflatoxins by the Aspergillus spp. isolated from red chilli (Capsicum annuum L. Solanaceae) available throughout the country. The results found in the experiment are much more behind the acceptable limit according to some international standard. As red chilli is a widely used spice in Bangladesh, the proper controlling measures may be taken for controlling the surveillance of aflatoxinic fungi like as use of bio-pesticides, proper drying method and storage conditions.
The Design and Implementation of Hybrid Automatic Solar Tracking System
Nur Mohammad,Tarequl Karim
International Journal of Electrical and Power Engineering , 2012, DOI: 10.3923/ijepe.2012.111.117
Abstract: A solar tracking system is the device for orienting solar photovoltaic modules and solar thermal collectors toward the sun. This study presents a microcontroller based energy efficient hybrid automatic solar tracking system with a view to assess the improvement in solar conversion efficiency. The two-axis solar tracking system is constructed with both hardware and software implementations. The proposed tracking system uses a new solar sensor position with an adaptive feature. The economical analysis of the solar tracking systems is an important element of this reaearch. A comparative analysis was performed using three systems, i.e., hybrid, dual-axis tracking, single-axis and stationary module. The results showed that the use of the dual-axis tracking system produced 18% gain of power output, compared with a single-axis tracking system. The gain of output power with the dual-axis tracking system was much higher (54%) when compared with a stationary system inclined at 23.5° to the horizontal which is reasonable. Considering the state of the art of the technology, successful strategy, robust control philosophy and the potential added benefit of this research can be employed on a large scale in sustainable manner.
Parasitic Effects on the Performance of DC-DC SEPIC in Photovoltaic Maximum Power Point Tracking Applications  [PDF]
Nur Mohammad, Muhammad Quamruzzaman, Mohammad Rubaiyat Tanvir Hossain, Mohammad Rafiqul Alam
Smart Grid and Renewable Energy (SGRE) , 2013, DOI: 10.4236/sgre.2013.41014
Abstract:

This paper presents an analysis of the effect of parasitic resistances on the performance of DC-DC Single Ended Pri- mary Inductor Converter (SEPIC) in photovoltaic maximum power point tracking (MPPT) applications. The energy storage elements incorporated in the SEPIC converter possess parasitic resistances. Although ideal components significantly simplifies model development, but neglecting the parasitic effects in models may sometimes lead to failure in predicting first scale stability and actual performance. Therefore, the effects of parasitics have been taken into consideration for improving the model accuracy, stability, robustness and dynamic performance analysis of the converter. Detail mathematical model of SEPIC converter including inductive parasitic has been developed. The performance of the converter in tracking MPP at different irradiance levels has been analyzed for variation in parasitic resistance. The converter efficiency has been found above 83% for insolation level of 600 W/m2 when the parasitic resistance in the energy storage element has been ignored. However, as the parasitic resistance of both of the inductor has increased to 1 ohm, a fraction of the power managed by the converter has dissipated; as a result the efficiency of the converter has reduced to 78% for the same insolation profile. Although the increasing value of the parasitic has assisted the converter to converge quickly to reach the maximum power point. Furthermore it has also been observed that the peak to peak load current ripple is reduced. The obtained simulation results have validated the competent of the MPPT converter model.

Copper and Mercury in Food, Biological and Pharmaceutical Samples: Spectrophotometric Estimation as Cu(DDTC)2  [PDF]
Mohammad Nasir Uddin, Nur Mostaq Shah, Mohammad Amzad Hossain, Md. Muzahidul Islam
American Journal of Analytical Chemistry (AJAC) , 2014, DOI: 10.4236/ajac.2014.513093
Abstract: An alternative spectrophotometric method was optimized and validated for the estimation of mercury using diethyldithiocarbamate (DDTC), a common reagent, widely used for the preconcentration and isolation of metal ions in complex matrices followed by their estimation by varied techniques. Diethyldithiocarbamate forms yellow Cu(DDTC)2 with copper and white Hg(DDTC)2 with mercury (having d10 system) which are extracted in CCl4. The UV-visible spectrum of Cu(DDTC)2 is very stable at pH 5.0 and has a maximum absorption (λmax) at 435 nm. Hg(DDTC)2 is more stable than Cu(DDTC)2. Estimation of mercury is based on a quantitative displacement of Cu(II) of Cu(DDTC)2 with the addition of mercury followed by the measurement of reduced absorbance. Primarily, method was optimized and validated for the estimation of copper. Therefore, simultaneous determination of Cu(II) and Hg(II) in mixture is proposed fractionating the extract. The molar specific coefficient (ε) for the mercury was 1.4 × 104 mol﹣1·L·cm﹣1 and for copper was 3.16 × 105 mol﹣1·L·cm﹣1 at 435 nm. The detection limits of Cu2+ and Hg2+ were 0.023 μg·mL﹣1 and 0.029 μg·mL﹣1, respectively. The calibration curve shows good linearity of 0.02 - 12.0 and 0.02 - 15.0 μg·mL﹣1 for the Cu2+ and Hg2+ determination, respectively. Proposed technique was applied to food, biological and pharmaceutical samples for the determination of Cu(II) and Hg(II).
An Excellent Image Data Hiding Algorithm Based on BTC
Nur Mohammad,Xingming Sun,Hengfu Yang
Information Technology Journal , 2011,
Abstract: The Development of modern communication technology, demand for digital image, audio, video and other contents transmission and storage are increasing rapidly. To protect digital product and ensure the secure transfer of the digital items become important issue in home and abroad. The researcher developed many algorithms; these are some specific fields. But cant grantee the whole safety of the contents. The Block Truncation Coding one of the effective and real time application for the hiding data compare with transform domain and other techniques. In a coding technique, a number of bits required to represent an image which needs less data store and less computation. Application of coding in the field of image processing generally concern image data compression for storage and transmission as well as feature extraction for pattern recognition. Most existing BTC-based data hiding algorithms do not fully exploit visual perception of the host images and cannot obtain high hiding capacity and visual quality. For fully exploit visual perception and high hiding capacity, an excellent data hiding scheme based on BTC is proposed. First, the BTC scheme uses a two level (one-bit) nonparametric quantizer that adapts to local properties of the image. Second we employed Human Visual System (HVS) masking characteristics which ensure high visual quality of stego image. At the last, we embedded the data into the modified bitmap of BTC. The experimental results show that the proposed algorithm has good transparency, high hiding capacity and the visual quality of stego-images is very good.
Modeling of Orientation-Dependent Photoelastic Constants in Cubic Crystal System  [PDF]
Lubna Jahan Rashid Pinky, Shakila Islam, Md. Nur Kutubul Alam, Mohammad Arif Hossain, Md. Rafiqul Islam
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.54027
Abstract:

Euler’s rotation theorem and tensor rotation technique are applied to develop a generalized mathematical model for determining photoelastic constants in arbitrary orientation of cubic crystal system. Two times rotations are utilized in the model relating to crystallographic coordinates with Cartesian coordinates. The symmetry of photoelastic constants is found to have strong dependence with rotation angle. Using the model, one can determine photoelastic constants in any orientation by selecting appropriate rotation angle. The outcome of this study helps to characterize spatial variation of residual strain in crystalline as well as polycrystalline materials having cubic structure using the experimental technique known as scanning infrared polariscope.

An Analysis of the Use of CMC in Synchronized Distance Training for Global Organizations
Kamrul Hasan Talukder,Md. Khademul Islam Molla,Abu Shamim Mohammad Arif
Asian Journal of Information Technology , 2012,
Abstract: Multinational companies and professional training institutes face several challenges when they deploy new policies, novel ideas and new courses to their audience in global environments. To constitute such training, local expertise is not always available. Moreover, the travel of the instructors/trainer increases cost and time distracting experts from their primary focus of research. An emerging solution to this problem is the utilization of computer mediated synchronized distance technology to impart the necessary training at minimum resources and maximum effectiveness. However, there is a need to carefully manage these training programs, in order that the instructors and the trainees avail of the benefits of distance learning avoiding the innate ambiguity that such a training method might harbor. Different organizations have deployed various types of tools and technologies to conduct efficient distance training. It is the prerogative of the management to select the proper technology to empower the instructor and to structure the course materials depending on the type of course, background of the trainees and consider the other factors in order to reap the benefits, which such training has to provide. This study presents an analysis of the use of Computer Mediated Communications (CMC) in synchronized distance training for global organizations. We also present how CMC can be used in the stated field effectively with some important recommendations to enhance the performance of the uses of CMC in this case.
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