mamun rashid - Academia.edu (original) (raw)

Papers by mamun rashid

Knowing my background, an editorial member of a vernacular business daily wanted me to write more... more Knowing my background, an editorial member of a vernacular business daily wanted me to write more on banking and also on issues such as banking, rather than softer social and political issues. He thought, I may soon lose my lustre by becoming a `potato', trying to be a part of all curries. I thought his message though little `harsh', may be applicable to many of us who are out to earn popularity by getting engaged in all possible discussions.

A simplified numerical algorithm was developed to solve the nonlinear Monod-kinetics for an organ... more A simplified numerical algorithm was developed to solve the nonlinear Monod-kinetics for an organic contaminant, oxygen, nitrate, and microbial population. The numerical algorithm is presented in the batch-reactor mode and the accuracy and efficiency of the algorithm were tested with an iterative solution using the Runge-Kutta method. The results showed a good match between the two solutions with a high computational efficiency. The applicability of the algorithm was further tested using a field-scale example of natural attenuation where the algorithm was coupled with the advective-dispersive transport equations. The results showed remarkable computational efficiency of the algorithm in solving the nonlinear coupled transport equations to the extent of ready-applications in field-scale remediation designs.

Bangladesh Journal of Scientific and Industrial Research, 2021

Ginger powder was prepared using different low temperature drying techniques and their nutritiona... more Ginger powder was prepared using different low temperature drying techniques and their nutritional, phytochemicals, functional and sensory quality were investigated. Moisture content was significantly (p<0.05) higher (7.16±0.04%) in shade dried powder and lowest in oven dried powder. Protein, fat and fiber contents varied with drying techniques ranging from 6.08±0.05 to 6.68±0.07%, 1.08±0.16 to 1.39±0.25% and 3.86±0.13 to 5.11±0.06% respectively. Highest alkaloid content was found in mechanical dried powder (4.44±0.04%), while highest flavonoid content was found in oven dried ginger powder (4.67±0.07%) and maximum saponin content was recorded in shade dried powder (2.67±0.10%). Highest ascorbic acid content (3.53±0.08 mg/100g) was found in shade dried powder and lowest was recorded in oven dried ginger powder (3.53±0.08 mg/100g). Sun drying technique exhibited better nutritional and sensory quality. The sensory score demonstrated that acceptance of all dried ginger powder was in ...

Asian Food Science Journal, 2021

Aegle marmelos Correa commonly known as “Bael,” has been recognized as a component of traditional... more Aegle marmelos Correa commonly known as “Bael,” has been recognized as a component of traditional medication for the treatment of various human ailments. The present study was focused on phytochemical screening, nutritional constituent of A. marmelos at different development stages. Highest amount of alkaloid was in premature bael (8.09±0.09 mg/g), phenols in premature bael (9.65±0.06 mg/g) pulp and saponins in mature bael(5.57±0.08) pulp. Highest amount of thiamin (B1) (1.83±0.03 mg/100 g) and ascorbic acid (48.62±0.04 mg/100 g) in premature bael pulp. Sugar content significantly highest in matured bael(6.94±0.04 mg/100 g) pulp. Most abundant mineral potassium content was maximum in (139.61±0.04 mg/100 g) premature bael fruit pulp. The nutritional constituents and phytochemicals change depending on maturation stage. Nutritional constituent changes on the effects of development of bael (Aegle marmelos) fruit. It has been found in the present study that there were a numbers of phytoc...

European Journal of Agriculture and Food Sciences, 2021

The objective of this study was focused on drying techniques including oven, mechanical, sun and ... more The objective of this study was focused on drying techniques including oven, mechanical, sun and shade drying on changes in phytochemicals and scavenging antioxidant capacity of ginger powder. The dry ginger had highest phenolics content (487.87±2.63 mg GAE/g) and flavonoids (322.63±3.74 mg RE/g) on weight basis. The highest DPPH antioxidant scavenging capacity in (78.13±1.02%) and highest FRAP assay in (38.64±0.76 mmol Fe(II)/mg). Oven drying technique had a positive effect on retaining flavonoids content. Shade drying technique had a positive effect on retaining phenolics content, ascorbic acid and DPPH antioxidant scavenging activity assay. On the other hand, sun drying technique had a positive effect on retaining FRAP antioxidant assay. The changes in antioxidant scavenging activity due to the drying techniques were positively correlated with phytochemicals content. Drying techniques caused a significant change in phytochemicals and antioxidant activity in dry ginger. However, i...

European Journal of Medicinal Plants, 2020

This study was executed to produce dehydrated ginger powder using four different drying methods v... more This study was executed to produce dehydrated ginger powder using four different drying methods viz. sun, oven, mechanical and microwave along with their nutritional, mineral content and sensory quality evaluation. Microwave dried powder contained highest moisture content (7.10±0.04%) and was significantly different to other drying methods. Protein, fat, ash and crude fiber contents ranged from (6.10 ± 0.05 to 6.78 ± 0.07%), (1.01 ± 0.16 to 1.42 ± 0.25%), (3.21 ± 0.12 to 4.07 ± 0.10%) and (3.76 ± 0.13 to 4.88 ± 0.12%) respectively. K and Ca contents ranged from (20.45 ± 0.06 to 26.35 ± 0.07 mg/100 g) and (108.64 ± 0.09 to 188.62 ± 0.07 mg/100 g), respectively. Though some values were significantly different (P<0.05) under different drying conditions, the analyzed results showed that the produced ginger powder retained a good nutritional profile, minerals and sensory quality.

Journal of microbiology, immunology, and infection = Wei mian yu gan ran za zhi, 2015

Nearly all published studies of recurrent Clostridium difficile infections (CDI) report recurrent... more Nearly all published studies of recurrent Clostridium difficile infections (CDI) report recurrent CDI within 8 weeks after the primary infection. This study explored the molecular characteristics of C. difficile isolates from the first recurrent CDI more than 8 weeks after the primary infection. Consecutive hospitalized patients with a recurrent CDI more than 8 weeks after a primary infection were enrolled prospectively from January 2008 to February 2011. All C. difficile isolates of the primary and recurrent infections were collected and subjected to polymerase chain reaction ribotyping and antimicrobial susceptibility testing. There were 62 cases of CDI in this study, which included 32 cases (51.6%) of recurrence due to the same ribotype of C. difficile, 26 (41.9%) cases due to a different ribotype, and four (6.5%) cases with 2-4 recurrences due to the same or different strains. One hundred and forty C. difficile isolates were obtained, which included 62 primary CDI isolates and 7...

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2007

We have developed Microsystems with capillary electrophoresis and an electrochemical detector (CE... more We have developed Microsystems with capillary electrophoresis and an electrochemical detector (CE-ECD). The microfabricated CE-ECD systems can be used as a disposable device and the characteristics have been optimized for application in electrochemical detection. The system has been realized on a Polystyrene (PS) polymer chip with gold electrodes. The injection and separation channels were produced by relatively simple and inexpensive methods. An electro-osmotic flow system (EOF) and a three-electrode electrochemical detector were fabricated on the same substrate in a single process. Cyclic voltammetry has been used to test the electrodes behaviour with catechol and dopamine in buffers of different pH. In this article, we give an overview on the methodological aspects of coupling ED (electrochemical Detection) with Capillary Electrophoretic systems.

Micro and Nanosystemse, 2010

We review recent work on the development of polymer microfluidic devices using capillary electrop... more We review recent work on the development of polymer microfluidic devices using capillary electrophoresis (CE) for fluid driving and separation and electrochemical detection (ED). A variety of commonly used off-chip and integrated electrochemical detection approaches, including amperometric, conductimetric and potentiometric detection approaches, have been given. We describe fabrication approaches for the creation of microfluidic architecture in a polymer substrate and electrode integration. The methods for polymer surface modification to enhance the microfluidic device properties are also described as well as developments in power supply for the creation of a robust CE-ED microfluidic device system. A variety of applications are described for the CE-ED systems.

2008 IEEE International Solid-State Circuits Conference - Digest of Technical Papers, 2008

Abstract This third-generation chip-multithreading (CMT) SPARC processor is targeted for high-per... more Abstract This third-generation chip-multithreading (CMT) SPARC processor is targeted for high-performance servers, and is optimized for both single-and multi-threaded applications. The architecture highlights are provided in [M. Tremblay and S. Chaudhry, 2008], while ...

Bangladesh Journal of Pharmacology, 2008

Effects of fenugreek (Trigonella foenugraecum Linn) on serum lipid profile in hypercholesteremic ... more Effects of fenugreek (Trigonella foenugraecum Linn) on serum lipid profile in hypercholesteremic type 2 diabetic patients were studied. Administration of fenugreek seed powder of 25 gm orally twice daily for 3 weeks and 6 weeks produces significant (P<0.001) reduction of serum total cholesterol, triacylglyceride and LDL-cholesterol in hypercholesteremic group but the change of serum HDLcholesterol was not significant. On other hand, changes of lipid profile in hypercholesteremic type 2 diabetic patients without fenugreek were not significant (P<0.001). The present study suggests that fenugreek seed powder would be considered as effective agent for lipid lowering purposes.

Bangladesh Journal of Physiology and Pharmacology, 2010

The study has been carried out to observe the effect of calcium therapy on urinary calcium/creati... more The study has been carried out to observe the effect of calcium therapy on urinary calcium/creatinine ratio in healthy gravid women and pre-eclamptic women. Calcium/creatinine ratio has been considered for early detection of pre-eclamptic toxaemia (PET). So for the diagnosis of PET we try to investigate relation of urinary calcium, urinary creatinine, urinary calcium/creatinine ratio before and after calcium therapy. For this purpose total number of 60 healthy gravid and clinically suspected PET women of 20- 28 weeks of pregnancy having age ranged from, 17-39 years were selected. Of these 30 healthy pregnant women were taken as control group and another clinically diagnosed 30 PET women were taken as observational group. Urinary calcium/creatinine ratio was within normal range in healthy pregnant women and after calcium therapy this ratio was not significantly changed. On the other hand urinary calcium/creatinine ratio in PET women was significantly decreased and this ratio was sign...

Journal of Contaminant Hydrology, 1999

Bioremediation has become an important remediation technology during the past few years. However,... more Bioremediation has become an important remediation technology during the past few years. However, limited understanding of processes, data limitations and parameter uncertainty, and computationally intensive numerical solutions have reduced the interest to perform detailed field-scale modeling, especially with non-linear Monod expressions. In this paper, the focus was computational efficiency where a simplified numerical algorithm was developed to solve the non-linear reactions between the hydrocarbon, oxygen, nitrate, and a heterotrophic facultative microbial population. The numerical algorithm was presented using a commonly adapted conceptual model of reaction kinetics between different species with multi-term Monod expressions. The accuracy and efficiency of the algorithm were tested with an iterative solution using the Runge-Kutta method. Simulation results obtained from reaction only and one-dimensional advection-dispersion-reaction transport examples showed good accuracy while maintaining numerical stability. In general, the accuracy increased with contaminant concentrations relatively higher than the corresponding half-saturation constant. Also, the simplified algorithm is found to be much more computationally efficient than the iterative technique. The gain in computational efficiency was at least threefold and this gain increased with the increase of time step. Future work will explore the efficiency and accuracy of the proposed simplified algorithm with field-scale scenarios related to intrinsic and enhanced bioremediation.

IEEE Journal of Solid-State Circuits, 2009

Abstract This third-generation Chip-Multithreading (CMT) SPARC processor consists of 16 cores wit... more Abstract This third-generation Chip-Multithreading (CMT) SPARC processor consists of 16 cores with shared memory architecture and supports a total of 32 main threads plus 32 scout threads. It is targeted for high-performance servers, and is optimized for both single-and ...