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CHICKEN MYCOPLASMOSIS IN BANGLADESH
Biswas, H.R.,Khatun, H.,Mustafa, A.H.M.,Miah, A.H.,Hoque, M.M.,Rahman, M.L. Asian Australasian Association of Animal Productio 1993 Animal Bioscience Vol.6 No.2
A total of 4,800 chicken sera from Broiler, Layer, and Local chicken were tested to detect the presence of Mycoplasma gallisepticum (Mg) antibody by Rapid Serum Plate and Tube Agglutination Test. Positive cases recorded in this study were 945 (27%) in Broiler, and 436 (36.7%) in layer chicken sera and no. M. gallisepticum antibody could be seen in the local chicken sera. It is evident from the present findings that Mycoplasma gallisepticum infection has been prevailing in this country in improve breeds of chickens.
Use of Lysozyme as a Feed Additive on In vitro Rumen Fermentation and Methane Emission
Biswas, Ashraf A.,Lee, Sung Sill,Mamuad, Lovelia L.,Kim, Seon-Ho,Choi, Yeon-Jae,Bae, Gui-Seck,Lee, Kichoon,Sung, Ha-Guyn,Lee, Sang-Suk Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.11
This study was conducted to determine the effect of lysozyme addition on in vitro rumen fermentation and to identify the lysozyme inclusion rate for abating methane ($CH_4$) production. An in vitro ruminal fermentation technique was done using a commercial concentrate to rice straw ratio of 8:2 as substrate. The following treatments were applied wherein lysozyme was added into 1 mg dry matter substrate at different levels of inclusion: Without lysozyme, 2,000, 4,000, and 8,000 U lysozyme. Results revealed that, lysozyme addition had a significant effect on pH after 24 h of incubation, with the highest pH (p<0.01) observed in 8,000 U lysozyme, followed by the 4,000 U, 2,000 U, and without lysozyme. The highest amounts of acetic acid, propionic acid (p<0.01) and total volatile fatty acid (TVFA) (p<0.05) were found in 8,000 U after 24 h of incubation. The $CH_4$ concentration was the lowest in the 8,000 U and the highest in the without lysozyme addition after 24 h of incubation. There was no significant differences in general bacteria, methanogen, or protozoan DNA copy number. So far, addition of lysozyme increased the acetate, propionate, TVFA, and decreased $CH_4$ concentration. These results suggest that lysozyme supplementation may improve in vitro rumen fermentation and reduce $CH_4$ emission.
Biswas, Ritam The Kangwon-Kyungki Mathematical Society 2018 한국수학논문집 Vol.26 No.4
In this paper the growth properties of the composition of integer translated entire and meromorphic functions in terms of their (p, q)-th order are discussed and based upon that some new results are developed.
Biswas, S.,Kim, D.I.,Suwas, S. Elsevier Sequoia 2012 Materials science & engineering. properties, micro Vol.550 No.-
In the present study, asymmetric rolling was carried out for incorporating a shear component during the rolling at different temperatures, and was compared with conventional (symmetric) rolling. The microstructures were investigated using electron back-scatter diffraction (EBSD). The strain incorporated was compared with the help of grain orientation spread (GOS). GOS was eventually used as a criterion to partition the microstructure for separating the deformed and the dynamically recrystallized (DRX) grains. The texture of the partitioned DRX grains was shifted by ~30<SUP>o</SUP> along the c-axis from the deformed grains. The mechanism of dynamic recrystallization (DRX) has been identified as continuous dynamic recovery and recrystallization (CDRR). The partitioned deformed grains for the higher temperature rolled specimens exhibited a texture similar to the room temperature rolled specimen. The asymmetric rolling introduces a shear component which shifts the texture fibre by ~5-10<SUP>o</SUP> from the conventional rolling texture. This led to an increase in ductility with little compromise on strength.
Biswas, M.,An, H.,Choi, S.M.,Son, J.W.,Lee, J.H.,Kim, B.K.,Lee, H.W.,Yoon, K.J. Ceramurgica ; Elsevier Science Ltd 2016 CERAMICS INTERNATIONAL Vol.42 No.8
The major barrier to the practical application of Ba(Zr,Y)O<SUB>3</SUB> (BZY) as an electrolyte material for proton-conducting fuel cells (PCFCs) lies in its extremely inferior sintering characteristics. In this research, flux composed of 28mol% BaO and 72mol% CuO was employed as a novel sintering aid for BZY. Incorporation of nano-crystalline BaO-CuO flux, with a eutectic point of 890<SUP>o</SUP>C, remarkably enhanced the sintering behavior of BZY due to the formation of a transient liquid phase, and a relative density of up to 97% of the theoretical density was obtained at 1300<SUP>o</SUP>C with a short soaking time of 2h.
Biswas, Tanmay The Kangwon-Kyungki Mathematical Society 2018 한국수학논문집 Vol.26 No.1
The main aim of this paper is to prove some results related to the growth rates of composite entire and meromorphic functions on the basis of their relative (p, q)-th order, relative (p, q)-th lower order, relative (p, q)-th type and relative (p, q)-th weak type where p and q are any two positive integers.
Thermal Evolution of BaO-CuO Flux as Sintering Aid for Proton Conducting Ceramic Fuel Cells
Biswas, Mridula,Hong, Jongsup,Kim, Hyoungchul,Son, Ji-Won,Lee, Jong-Ho,Kim, Byung-Kook,Lee, Hae-Weon,Yoon, Kyung Joong The Korean Ceramic Society 2016 한국세라믹학회지 Vol.53 No.5
The eutectic melt of BaO-CuO flux is known to be a potential sintering aid for $Ba(Zr,Y)O_3$ (BZY) electrolyte for proton-conducting ceramic fuel cells (PCFCs). A density of BZY higher than 97% of theoretical density can be achieved via sintering at $1300^{\circ}C$ for 2 h using a flux composed of 28 mol% BaO and 72 mol% CuO. In the present study, chemical and structural evolution of BaO-CuO flux throughout the sintering process was investigated. An intermediate holding step at $1100^{\circ}C$ leads to formation of various impurity compounds such as $BaCuO_{1.977}$, $Ba_{0.92}Cu_{1.06}O_{2.28}$ and $Cu_{16}O_{14.15}$, which exhibit significantly larger unit cell volumes than the matrix. The presence of such secondary compounds with large lattice mismatch can potentially lead to mechanical failure. On the other hand, direct heating to the final sintering temperature produced CuO and $Cu_2O$ as secondary phases, whose unit cell volumes are close to that of the matrix. Therefore, the final composition of the flux is strongly affected by the thermal history, and a proper sintering schedule should be used to obtain the desired properties of the final product.
Biswas, Dibyendu,So, Kyoung Ha,Hwang, Seon Ung,Yoon, Junchul David,Kim, Mirae,Kim, Dae Young,Hyun, Sang Hwan Elsevier 2018 Theriogenology Vol.120 No.-
<P><B>Abstract</B></P> <P>Current research suggests that supplementing <I>in vitro</I> culture (IVC) media with vascular endothelial growth factor (VEGF) may have beneficial effects on the development of porcine embryos <I>in vitro</I>. However, the molecular signaling mechanisms underlying this effect are unclear. Therefore, we aimed to investigate the effects of VEGF on molecular signaling events during <I>in vitro</I> embryonic development of porcine embryos. Porcine oocytes matured <I>in vitro</I> were fertilized, and the resultant zygotes were cultured with 5 ng/mL of VEGF supplemented with or without fetal bovine serum from day 4 till day 7. Without VEGF and/or FBS served as the control group. Real-time quantitative PCR was used to detect expression patterns of apoptosis- and oxidative stress-related genes in day 7 blastocysts (BLs). Early-stage apoptosis was detected by annexin-V assays in day 2 and day 7 embryos. We found that the addition of VEGF throughout the culture period with or without FBS supplementation significantly improved embryo survival and development. Supplementation with VEGF in the IVC medium significantly increased early BL formation (p < 0.05), although addition of FBS on day 4 significantly increased hatched BL formation (p < 0.05) regardless of VEGF supplementation. However, supplementation of media with both VEGF and FBS increased the formation of expanded BLs synergistically. The average total cell numbers per BL were significantly (p < 0.05) higher in embryos supplemented with VEGF and FBS than in those supplemented with either VEGF or FBS alone. We also found that accumulation of reactive oxygen species in VEGF-treated embryos was significantly lower (p < 0.05) than that in untreated embryos. The mRNA levels of caspase-3 were significantly lower (p < 0.05), and those of Bcl<I>-</I>2 and Nrf<I>-</I>2 were significantly higher (p < 0.05) in embryos grown in VEGF-supplemented media than in embryos grown in non-supplemented media. Furthermore, on day 2, the numbers of viable embryos (44.06 ± 3.94%) and blastomeres (67.18 ± 3.60%) were significantly higher (p < 0.05), and the numbers of early apoptotic embryos (55.94 ± 3.94) and blastomeres (23.23 ± 4.22) were significantly lower (p < 0.05) in VEGF-treated BLs than in controls. Furthermore, the numbers of early apoptotic cells in BLs on day 7 were also significantly lower (p < 0.05) in VEGF-treated BLs than in controls. Overall, our results indicate that supplementing IVC media with VEGF during <I>in vitro</I> culture of porcine embryos increases their developmental potential.</P>
Biswas, S.K.,Baeg, J.O. Pergamon Press ; Elsevier Science Ltd 2013 International journal of hydrogen energy Vol.38 No.34
Herein, we report the preparation, characterization and investigation of previously unexplored W incorporated iron vanadate (FeVO<SUB>4</SUB>) electrodes for solar light driven water oxidation in photoelectrochemical cell. The W incorporated FeVO<SUB>4</SUB> films on F-doped SnO<SUB>2</SUB> substrates have been prepared by layer-by-layer deposition of metal-organic precursor and subsequent thermal decomposition at 550 <SUP>o</SUP>C in air. The synthesized films with a band gap of about 2.06 eV are responsive to visible light up to wavelength of ~600 nm, i.e. being able to harvest ~45% of the solar spectrum. The W incorporated FeVO<SUB>4</SUB> photoanodes are active materials for photoelectrochemical water oxidation and, yield a significantly enhanced (2.5 fold higher) photocurrent in comparison to pristine FeVO<SUB>4</SUB> photoanodes. This improvement can be attributed to increased n-type conductivity by W<SUP>6+</SUP> ion doping in the FeVO<SUB>4</SUB> lattice. The incident photon to current conversion efficiency achieved with developed photoanodes is as high as 6.5% at 400 nm.