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RISS 인기검색어
- 검색키워드
- 저자 : Hossain Muhammad Sarwar (검색결과 4 건)
- 무료
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Development and Performance Evaluation of a Two-Wheeled Power-Tiller Multi-row Weeder
Saha Kowshik Kumar,Hossain Akbar,Hoque Muhammad Arshadul,Jahan Md. Abu Hena Sarwar,Ahmed Sharif,Timsina Jagadish 한국농업기계학회 2021 바이오시스템공학 Vol.46 No.1
Purpose This study was conducted to design, construct, and test a two-wheeled power tiller multi-row weeder (MRW) for effective weed control in wheat production field and other narrow-row crops. This concept was conceived from the high cost and labour-intensive methods required for hand weeding (HW) and the restrictions in chemical weed control borne by the resource-poor smallholder farmers of South Asia. Methods An MRW was designed, fabricated, and field tested with other weeding techniques (HW using khurpi, HWusing a hand spade, weeding using a Bangladesh Agricultural Research Institute (BARI) dry land weeder, and no weeding) at the Farm Machinery and Postharvest Process Engineering Division, Bangladesh Agricultural Research Institute BARI centre in Gazipur during 2013–2014 and 2014–2015 wheat growing seasons. Results The results have shown that the MRW had a higher percentage of plant damage (4.3–4.6%) but also higher actual field capacity (0.12–0.14 ha/h), resulting in lower weeding cost than other weed control techniques. Hand weeding using a khurpi treatment had significantly (p ≤ 0.05) higher weed control efficiency but had higher weeding cost and was labour-intensive (81–93%) than all other treatments, suggesting that it may not be a feasible option for smallholder farmers. Wheat grain yield was similar (p ≤ 0.05) for all weed control methods but significantly higher than the control treatment. In spite of the higher percentage of plant damage in MRW, there was no adverse effect on achieving the desired plant population as evidenced from the grain yield data. Conclusions Results suggest good performance and significant potential of MRWbut also a need for further improvement for its wider adoption by smallholder farmers in Bangladesh and South Asia.
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Hossen Quazi Md. Mosaddeque,Rahman S. M. Badier,Rahman Md. Nazibur,Sarker Muhammad Delwar Hossain,Moniruzzaman Md.,Tareq Md. Zablul,Sadat Md. Abu,Arafat Kazi Md. Yasin,Jahan Md. Sarwar,Haque Md. Samiu 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.4
Polyethene is a global environmental threat, whereas jute (Corchorus spp.) fber is biodegradable, eco-friendly and can be used as a substitute for polyethene. Jute is a short-day plant and cultivated in March to July in Indian subcontinent for bast fber production. This season-bound cultivation nature hampers continuous supply of bast fber in the industry. In addition, its long cultivation period creates difculties to accommodate other high-value crops. To address these issues, a short life span (early fowering) jute genotype is extremely felt in jute growing areas of the world. But, unfortunately such variety has not been developed yet through both conventional and biotechnological approach. Accordingly, we adopted chemical mutagenesis by establishing LD50 (Lethal Dose) of EMS (Ethyl Methane Sulfonate) at 150 mM with 4h’ incubation for Capsularis jute seed. A novel mutant was found named—Komola, which showed a shorter lifespan than its ancestor by fowering at 70 days instead of 120 days. In addition, the mutant's stem and petiole was coppery-red instead of green. Molecular analysis revealed four SNPs in PMIR1 (Plastid Movement Impaired 1 Related 1) and two clade deletions in ELF3 (Early Flowering 3) genes from stable M4 generation. Histochemical and biochemical analyses explained this genotype’s lower content of lignin. This mutant could be used as future breeding material for the development of year-round cultivable jute genotype along with ofer up accommodation of other high-value agricultural crops in cropping pattern with a good source of year-round supply of bast fber to the industry
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Thanh Nguyen Huu,Shaariikhuu Erdenechimeg,Nguyen Thi Xuyen,Hossain Muhammad Sarwar,Tae Eunju Lee,Reddy Guda Dinneswara,윤경병 대한화학회 2023 Bulletin of the Korean Chemical Society Vol.44 No.4
Cross-linked polystyrene and polydivinylbenzene (PDVB) have unreacted pendant vinyl groups. They readily undergo aging or oxidation with air even at room temperature, giving rise to formation of OH and (CO)CH3 groups within the polymers. We now report that the aging process involves the release of carbon monoxide (CO) and hydrogen (H2) in significant amounts at 40 C and the rate increases with time and temperature. The amounts of CO and H2 released from PDVB at a given temperature can be expressed using a polyno- mial equation of Aa = Bt + Ct2, where Aa is the accumulated amount, t is the time in the unit of day, and B and C are the coefficients. The coefficients B and D increase with increasing temperature. This result shows that the storage rooms for the above polymers and their composites should be well ventilated to prevent inhalation of CO by the workers and H2-induced potential hazards.
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KOIRALA AGNI RAJ,Thanh Nguyen Huu,Shaariikhuu Erdenechimeg,Nguyen Thi Xuyen,Hossain Muhammad Sarwar,윤경병 대한화학회 2023 Bulletin of the Korean Chemical Society Vol.44 No.4
We report the map of 20 reactions that take place during vapor-phase photo- chemical dehydrogenation of ethanol on four metal-doped TiO2 (Mn/TiO2, Mn = nanoparticles of Pd, Pt, Au, and Cu) under solar simulated light. The reac- tions are sensitively affected by the moisture amount and the nature of the car- rier gas. To construct the above map, we also used CH3CHO, CH3CO2H, (C2H5O)2CHCH3, and CH3CO2C2H5, respectively, as an independent starting reagent. Amazingly, Mn/TiO2 not only serves as photocatalysts but also as ther- mocatalysts for various reactions that appear in the above map. The reaction is proposed to proceed by a radical mechanism in which photoinduced electron transfer from the valence band to the conduction band of TiO2 is the initial step and the subsequent electron injection from organic reactants to the hole in the TiO2 valence band. This report also features highly valuable unprece- dented reactions, which bear great potential to be commercialized.
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