A5017900471- Biofuel production and bioconversion
- Microbial Metabolic Engineering and Bioproduction
- Enzyme Catalysis and Immobilization
- Advanced Chemical Physics Studies
- Porphyrin and Phthalocyanine Chemistry
- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Electrochemical Analysis and Applications
- Injection Molding Process and Properties
- Arsenic contamination and mitigation
- Advanced machining processes and optimization
- Algal biology and biofuel production
- Potato Plant Research
- Advanced Cellulose Research Studies
- Catalysis for Biomass Conversion
- Additive Manufacturing and 3D Printing Technologies
- Heavy metals in environment
- Air Quality and Health Impacts
- Molecular Sensors and Ion Detection
- Enzyme Production and Characterization
- Urban Stormwater Management Solutions
- Innovations in Concrete and Construction Materials
- Vehicle emissions and performance
Chittagong University of Engineering & Technology
2014-2025
North Dakota State University
2012-2024
Noakhali Science and Technology University
2022-2024
Dakota State University
2024
National Institute of Food and Agriculture
2023
United States Department of State
2023
Swedish University of Agricultural Sciences
2011-2022
Mymensingh Medical College Hospital
2022
State University of Medan
2019
University of Malaya
2014-2017
We analysed N2 - and carbon (C) fixation in individual cells of Baltic Sea cyanobacteria by combining stable isotope incubations with secondary ion mass spectrometry (SIMS). Specific growth rates based on C-fixation were higher for Dolichospermum spp. than Aphanizomenon sp. Nodularia spumigena. The cyanobacterial biomass, however, was dominated sp., which contributed most to total -fixation surface waters the Northern Proper. Pseudanabaena colonial picocyanobacteria not detectable. N....
Abstract Dinitrogen (N2)-fixation by cyanobacteria living in symbiosis with pleurocarpous feather mosses (for example, Pleurozium schreberi and Hylocomium splendens) represents the main pathway of biological N input into N-depleted boreal forests. Little is known about role cyanobacterial community contributing to observed temporal variability N2-fixation. Using specific nifH primers targeting four major clusters quantitative PCR, we investigated how composition, abundance expression varied...
In this research work, we propose macronutrients incorporated slow-release based nano-fertilizer using nanozeolite as a carrier. A simple chemical approach was used to synthesis the proposed composite fertilizer (NZCF). To gain an insight into properties, morphology and structure of synthesized NZCF, it further characterized by different techniques such powder XRD, FT-IR, SEM, TG/DTA. considerable enhancement quality water retention capacity soil observed result applying NZCF when compared...
The results from 1-year of measurements PM2.5, organic carbon (OC) and black (BC) concentrations are presented for an urban traffic-influenced site, the Farm Gate in Dhaka, Bangladesh. were based on sampling using two Air Metrics simultaneously operating samplers. OC BC PM2.5 varied 5–96 μg/m3 4–48 μg/m3, respectively. 11–328 μg/m3. annual particulate matter (POM) accounted 46 ± 11% whereas stayed at 33 12%. effects meteorological conditions variability concentration examined contribution...
Microalgae growth is influenced by numerous culture parameters, and temperature considered one of the vital factors among them. In this study, a computational model related for microalgae cell to irradiance an outdoor operated Horizontal Loop Tubular Photobioreactor (HLTP) developed. The effects direct diffuse solar radiation on (PBR) are in model. An HLTP measuring length 20.5 m radius 0.025 has been assumed simulation carried out specific date where sunlight available. Thus, meteorological...
Aphanizomenon is a widespread genus of nitrogen (N2)-fixing cyanobacteria in lakes and estuaries, accounting for large fraction the summer N2-fixation Baltic Sea. However, information about its cell-specific carbon (C)- rates early growth season has not previously been reported. We combined various methods to study N2-fixation, photosynthesis respiration field-sampled Sea sp. during at 10°C. Stable isotope incubations situ light intensities 24 h with secondary ion mass spectrometry showed an...
Steroidal glycoalkaloids (SGA) are sterol-derived neurotoxic defence substances present in several members of the Solanaceae. In potato (Solanum tuberosum), high SGA levels may render tubers harmful for consumption. Tuber depend on genetic factors, and can increase as a response to certain stresses environmental conditions. To identify genes underlying cultivar variation tuber levels, we investigated two cultivars differing their accumulation during wounding or light exposure; known...
Abstract A water-soluble porphyrin, 2,3,7,8,12,13,17,18-octabromo-5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (H2obtpps4−; H2P4−) was synthesized and the equilibrium constants have been determined for reaction of H2obtpps4− with lithium(I), cadmium(II), mercury(II) at 25 °C in I = 0.1 mol dm−3 (NaNO3). The protonation were found to be 104.83 ± 0.04 mol−1 dm3, 101.96 0.06 10−10.02 0.02 K1 [H3P3−][H+]−1[H2P4−]−1, K2 [H4P2−][H+]−1[H3P3−]−1, K−1 [HP5−][H+][H2P4−]−1, respectively. porphyrin...
Abstract To explore mechanisms in plant sterol homeostasis, we have here increased the turnover of sterols Arabidopsis (Arabidopsis thaliana) and potato (Solanum tuberosum) plants by overexpressing four mouse cDNA encoding cholesterol hydroxylases (CHs), hydroxylating at C-7, C-24, C-25, or C-27 positions. Compared to wild type, types transformant showed varying degrees phenotypic alteration, strongest one being CH25 lines, which were dark-green dwarfs resembling brassinosteroid-related...
To explore the sources of carbonaceous material in airborne particulate matter (PM), comprehensive PM sampling was performed (3 to 14 January 2010) at a traffic hot spot site (HS), Farm Gate, Dhaka using several samplers: AirMetrics MiniVol (for <TEX>$PM_{10}$</TEX> and <TEX>$PM_{2.5}$</TEX>) MOUDI size fractionated submicron PM). Long-term data (April 2000 March 2006 April 2010 two fractions (<TEX>$PM_{2.2}$</TEX> <TEX>$PM_{2.2-10}$</TEX>) obtained from air quality-monitoring stations, one...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and Mechanism of Metal-Substitution Reaction Homodinuclear Mercury(II) Porphyrin with Zinc(II) Particular Reference to a Heterodinuclear Metalloporphyrin IntermediateMasaaki Tabata, Wakako Miyata, Nurun NaharCite this: Inorg. Chem. 1995, 34, 26, 6492–6496Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995https://doi.org/10.1021/ic00130a014RIGHTS & PERMISSIONSArticle...
Steroidal glycoalkaloids (SGA) are toxic secondary metabolites naturally occurring in the potato, as well certain other Solanaceous plant species, such tomato, eggplant and pepper. To investigate steroidal origin of SGA biosynthesis, cut potato shoots were fed cholesterol labelled with deuterium (D) sterol ring structure (D5- or D6-labelled), side chain (D7-labelled), analysed after three five weeks. The presence D-labelled by GC-MS LC-MS/MS, respectively. When feeding solubilised Tween-80,...