http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Soyema Khatun,Jalal Uddin Ahmed,Mohammed Mohi-Ud-Din 한국작물학회 2015 Journal of crop science and biotechnology Vol.18 No.2
An investigation on physiological changes was carried out in three wheat genotypes (BARI Gom 25, BARI Gom 26, and Pavon 76) through seed reserve utilization efficiency (SRUE) and leaf cooling under normal (15 / 25°C) and elevated (25 / 35°C) temperatures in the growth chamber. At high temperature, Pavon 76 required more days to initiate the fully autotrophic stage. After germination, seedling and remnant seed dry weight was the same at day 5 in BARI Gom 26 and day 6 in BARI Gom 25 and Pavon 76. At high temperature, maximum translocation efficiency and seed reserve utilization efficiency (SRUE) were observed in BARI Gom 26 and at a minimum value in Pavon 76. High leaf cooling was recorded in BARI Gom 26. At high temperature, due to high leaf temperature and low transpiration rate of Pavon 76, maximum reduction of seedling growth was recorded in Pavon 76 (17%) as compared to minimum in BARI Gom 26 (5%). It appeared from the result that at high temperature the better seed reserved utilization efficiency and subsequently larger leaf cooling collectively contributed a positive role for seedling development in BARI Gom 25 and BARI Gom 26. The relationship of seed reserve utilization efficiency and leaf temperature were prominent in the case of Pavon 76 (r = -0.768) compared to other genotypes. This relationship indicated that Pavon 76 was the most sensitive genotype and BARI Gom 25 and BARI Gom 26 was the tolerant genotype to heat stress in respect to seed reserve utilization efficiency during seed reserve dependent phase and leaf temperature of photosynthetic-dependent phase
Abu Hasan, Md.,Ahmed, Jalal Uddin,Hossain, Tofazzal,Mian, Md. Abdul Khaleque,Haque, Md. Moynul 한국작물학회 2013 Journal of crop science and biotechnology Vol.16 No.1
To examine the effect of high temperature during seed development and maturation on seed quality of wheat, seeds of four heat-tolerant and two heat-sensitive wheat genotypes obtained normal and high temperature growing conditions were tested for quality. High parent plant growth temperature during seed development and maturation resulted in poor seed quality. The effect of parent plant growth temperature on seed germination and speed of germination was inconsistent between heat tolerant and heat-sensitive wheat genotypes. Seed vigor as indicated by seed density, conductivity of seed leachates, seedling dry weight, production of normal seedlings, seed reserve utilization efficiency, and seedling emergence were reduced in all wheat genotypes due to higher parent plant growth temperature but heat-sensitive wheat genotypes were affected more than the heat-tolerant genotypes.
In vitro maturation and fertilization of prepubertal and pubertal black Bengal goat oocytes
Momena Khatun,Mohammad Musharraf Uddin Bhuiyan,Jalal Uddin Ahmed,Aminul Haque,Mohammed Shamsuddin,Mohammad Bozlur Rahman 대한수의학회 2011 Journal of Veterinary Science Vol.12 No.1
Oocytes retrieval, in vitro maturation (IVM) and fertilization (IVF) efficiency are inevitable steps towards in vitro production of embryos. In the present study, these parameters were investigated in the ovaries of prepubertal (n = 31) and pubertal (n = 61) black Bengal goats obtained from a slaughterhouse. Nuclear maturation was evaluated upon aspiration and following IVM in TCM-199 (Earle’s salt with L-glutamine and sodium bicarbonate) for 27 h at 39oC under 5% CO2 in humidified air. The oocytes retrieval and efficiency (mean ± SD) per prepubertal and pubertal goats were 5.2 ± 0.6 and 6.8 ± 0.6, and 77.3 ± 0.1% and 80.5 ± 0.6%, respectively. Anaphase I - telophase I stages differed significantly (7.3 ± 0.8 vs. 2.6 ± 0.2, p < 0.05) between the two groups of goats. After IVM, the percentages of metaphase II were significantly higher (66.3 vs. 60.3, p < 0.05) in pubertal goats than in their prepubertal counterparts. The percentages of normal in vitro fertilization (IVF) in Fert-Tyrode’s albumin lactate pyruvate of pubertal goat oocytes did not differ between Percoll and swim-up sperm separation methods (36.7 ± 0.9% vs. 32.7 ± 1.3%, p > 0.05). Furthermore, sperm capacitation by heparin alone or in combination with ionomycin did not lead to a significant increase in the normal fertilization rate (34.8 ± 1.7 vs. 32.2 ± 1.5%, respectively) in the oocytes of pubertal goats. In conclusion, the ovaries of pubertal black Bengal goats obtained from the slaughterhouse could be used for in vitro embryo production. However, further optimization of the IVM and IVF techniques are necessary for satisfactory in vitro embryo production.
Md. Abu Hasan,Jalal Uddin Ahmed,Tofazzal Hossain,Md. Abdul Khaleque Mian,Md. Moynul Haque 한국작물학회 2013 Journal of crop science and biotechnology Vol.16 No.1
To examine the effect of high temperature during seed development and maturation on seed quality of wheat, seeds of four heattolerant and two heat-sensitive wheat genotypes obtained normal and high temperature growing conditions were tested for quality. High parent plant growth temperature during seed development and maturation resulted in poor seed quality. The effect of parent plant growth temperature on seed germination and speed of germination was inconsistent between heat tolerant and heat-sensitive wheat genotypes. Seed vigor as indicated by seed density, conductivity of seed leachates, seedling dry weight, production of normal seedlings, seed reserve utilization efficiency, and seedling emergence were reduced in all wheat genotypes due to higher parent plant growth temperature but heat-sensitive wheat genotypes were affected more than the heat-tolerant genotypes.
M. Reefaz Rahman,M. Nasir Uddin,Tasnim Ashrafy,Mostofa Washif,M. Rakib Uddin,Mahbubul Hoq,Ahmed Hasnain Jalal 한국전기전자재료학회 2022 Transactions on Electrical and Electronic Material Vol.23 No.3
Intrinsic zinc oxide thin fi lms have defi ciencies in terms of structural, optical and electronic characteristics, which has given rise to researches on metal doped zinc oxide fi lms in the interest of enhancing its characteristics. Indium tin oxide, Au, Ag, Pt and Ti; which are extensively used in industrial level thin film applications but aluminum has low cost than those metals, so by doping with this on ZnO thin films, its performance and quality on the morphological, elemental, structural, optical and electrical attributes were analyzed in this research. Tuning of ZnO nanocrystalline thin fi lms’ optical band gap, doped by diff erent materials simplifi es possible elements for photonic applications. Sol–gel spin coating method has been used for these analyses which was accustomed to gain the Al doped ZnO (AZO) parent compounds on silicon-glass substrates. Ultra violet visible spectrophotometer was used to determine band gap tuning characteristics, urbach energy, transmittance and absorption properties. The Moss-Burstein outcome imprints the blue shift with thickness increment of the absorption end and there is a clear relationship between band gap and urbach energy. Tuning of band gap value varies from 3.22 eV to 3.26 eV by varying the fi lm thickness from 100 to 300 nm. A non-linear, non-monotonic relation has been seen for the change of optical and structural parameters of AZO thin fi lms. Deep research of structural and optical properties represents important information to get a better perspective of band gap dependence on structural properties.
Genotypic Variability in Plant Water Status of French Bean under Drought Stress
Choudhuryl, Apurba Kanti,Karim, Md. Abdul,Haque, Md. Moynul,Khaliq, Qazi Abdul,Ahmed, Jalal Uddin,Hossain, Md. Mofazzal 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.1
Seven genotypes of French bean (Phaseolus vulgaris L.) were evaluated under semi-controlled conditions at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh to analyze genotypic variability in leaf water status under water stress. The plants were grown under two moisture regimes, viz. 80% field capacity (FC) and 50% FC throughout the growing season. The genotypes showed significant variation in water relation traits. Genotypes BB24 and BB43 maintained higher relative water content (RWC), but lower turgid weight/dry weight ratio (TW/DW) and water uptake capacity (WUC). When drought susceptibility index (DSI) among the genotypes was considered, BB24 was found the most tolerant to drought and BB04 was the most susceptible one. A close positive relationship between leaf TW/DW and DSI under drought was recorded ($R^2=0.627$). Leaf TW/DW was decreased considerably due to water stress by 10% in genotype BB24 followed by BB43 (13%), and both BARI bushbean-2 and BB04 (19%). Stomatal aperture and whole plant transpiration rate were found minimal in the BB24 and BB43 compared to that of BB04 and BARI bushbean-2. Considering these water relation traits, genotypes BB24 and BB43 may be considered as relatively tolerant to tissue dehydration. The study also revealed that the TW/DW, WUC, stomatal aperture, and whole plant transpiration rate was negatively and significantly associated with yield; however, the RWC was positively correlated with yield under water stress conditions.
Genotypic Variability in Plant Water Status of French Bean under Drought Stress
Apurba Kanti Choudhury,Md. Abdul Karim,Md. Moynul Haque,Qazi Abdul Khaliq,Jalal Uddin Ahmed,Md. Mofazzal Hossain 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.1
Seven genotypes of French bean (Phaseolus vulgaris L.) were evaluated under semi-controlled conditions at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh to analyze genotypic variability in leaf water status under water stress. The plants were grown under two moisture regimes, viz. 80% field capacity (FC) and 50% FC throughout the growing season. The genotypes showed significant variation in water relation traits. Genotypes BB24 and BB43 maintained higher relative water content (RWC), but lower turgid weight/dry weight ratio (TW/DW) and water uptake capacity (WUC). When drought susceptibility index (DSI) among the genotypes was considered, BB24 was found the most tolerant to drought and BB04 was the most susceptible one. A close positive relationship between leaf TW/DW and DSI under drought was recorded (R2 = 0.627). Leaf TW/DW was decreased considerably due to water stress by 10% in genotype BB24 followed by BB43 (13%), and both BARI bushbean-2 and BB04 (19%). Stomatal aperture and whole plant transpiration rate were found minimal in the BB24 and BB43 compared to that of BB04 and BARI bushbean-2. Considering these water relation traits, genotypes BB24 and BB43 may be considered as relatively tolerant to tissue dehydration. The study also revealed that the TW/DW, WUC, stomatal aperture, and whole plant transpiration rate was negatively and significantly associated with yield; however, the RWC was positively correlated with yield under water stress conditions.