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샤리프자만 ( Sharifuzzaman ),박상민 ( Sang-min Park ),박금주 ( Keum-joo Park ) 한국환경기술학회 2017 한국환경기술학회지 Vol.18 No.1
혐기성 소화는 폐기물 처리를 수행하는데 있어서 환경오염 저감과 에너지 회수를 동시에 달성할 수 있는 효과적인 공정이다. 많은 농업부산물 및 산업폐기물은 이 분해성 물질을 많이 함유하고 있으므로 혐기성 소화의 후보가 될 수 있다. 공정폐수의 혐기성 소화에서 메탄올 첨가량이 바이오가스 생산에 미치는 효과를 분석하기 위하여 S 석유화학회사의 공정폐수에 메탄올을 3수준으로 첨가하여 혐기성 처리하였다. 공정폐수는 2 종류로 각각 3000 mg/L과 47440 mg/L 의 COD 값을 가지고 있었다. COD 농도 3000 mg/L인 폐수인 경우, 작용체적 150 mL의 반응기에 메탄올 3 mL를 첨가하여 처리하였을 때 바이오가스 발생량이 최대인 것으로 나타났다. COD 농도 47440 mg/L인 폐수에서는 메탄올을 첨가함으로써 pH 농도가 증가하여 바이오가스가 전혀 발생하지 않았다. Anaerobic digestion is an attractive waste treatment process in which both pollution control and energy recovery can be achieved. Many agricultural and industrial wastes are ideal candidates for anaerobic digestion because they contain high levels of easily biodegradable materials. The processed wastewater from S. Oil Company in Korea was used to produce biogas with three levels of methanol addition. The wastewater showed two different COD concentrations with 3000 and 47440 mg/L. Amount of methanol was varied to analyze its effect on the biodegradation with fixed amount of inoculums. For wastewater of 3000 mg/L COD concentration, biogas was produced most vividly with 3 mL methanol addition in 150 mL working volume digester. For wastewater of 47440 mg/L COD concentration, biogas was not produced with methanol addition.
First Record of Porpita porpita (Cnidaria: Hydrozoa) from the Coral Reef Ecosystem, Bangladesh
M. Shah Nawaz Chowdhury,S. M. Sharifuzzaman,Sayedur Rahman Chowdhury,Md. Rashed-Un-Nabi,M. Shahadat Hossain 한국해양과학기술원 2016 Ocean science journal Vol.51 No.2
The occurrence of Porpita porpita is reported, for the first time, in the coral island of St. Martin’s located in the southeastern coastal region of Bangladesh. P. porpita was found to occur in the lower littoral zone and beach rock pools, together with molluscan species, and collected during the pre-monsoon season when both water temperature (> 30°C) and salinity (> 30‰) tend to reach a maximum. This study recounts some details on the discovery and description of the species, and thus extends the global distribution and range limits of the genus Porpita.
Abu Zahed, Md.,Barman, Sharat Chandra,Sharifuzzaman, Md.,Xuan, Xing,Nah, Joong San,Park, Jae Yeong The Electrochemical Society 2018 Journal of the Electrochemical Society Vol.165 No.16
<P>In this study, we successfully developed a novel nanocomposite comprising hexagonal nickel oxide nanosheets (HNONS) and carboxyl-terminated reduced graphene oxide (Tr-rGO) using a hydrothermal process followed by calcinations for the detection of H<SUB>2</SUB>O<SUB>2</SUB> and ascorbic acid. The surface morphology and structure of HNONS@Tr-rGO were characterized using field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The electro catalytic activities of HNONS@Tr-rGO toward H<SUB>2</SUB>O<SUB>2</SUB> and ascorbic acid were investigated using cyclic voltammetry, amperometry, and electrochemical impedance spectroscopy. Under optimized conditions, the HNONS@Tr-rGO modified electrode exhibited a high sensitivity of 177.83 μAmM<SUP>−1</SUP>cm<SUP>−2</SUP>, wide linear range from 0.25 μM to 13.1 mM, and low detection limit of 0.25 μM (S/N = 3) as a non-enzymatic ascorbic acid sensor. Whereas, for H<SUB>2</SUB>O<SUB>2,</SUB> the sensor showed a high sensitivity of 222.16 μAmM<SUP>−1</SUP>cm<SUP>−2</SUP>, wide linear range from 0.3 μM to 10.7 mM, and low detection limit of 0.3 μM (S/N = 3). The feasibility of the developed highly sensitive, selective, and reproducible H<SUB>2</SUB>O<SUB>2</SUB> and ascorbic acid sensors was investigated in human serum. The experimental observations demonstrated that the HNONS@Tr-rGO nanocomposite is highly promising for the development of electrochemical sensors to detect biomolecules.</P>
Sumon, Md Afsar Ahmed,Sumon, Tofael Ahmed,Hussain, Md. Ashraf,Lee, Su-Jeong,Jang, Won Je,Sharifuzzaman, S.M.,Brown, Christopher L.,Lee, Eun-Woo,Hasan, Md. Tawheed The Korean Society for Microbiology and Biotechnol 2022 Journal of microbiology and biotechnology Vol.32 No.6
The Nile tilapia Oreochromis niloticus, Atlantic salmon Salmo salar, rainbow trout Oncorhynchus mykiss, olive flounder Paralichthys olivaceus, common carp Cyprinus carpio, grass carp Ctenopharyngodon idella and rohu carp Labeo rohita are farmed commercially worldwide. Production of these important finfishes is rapidly expanding, and intensive culture practices can lead to stress in fish, often reducing resistance to infectious diseases. Antibiotics and other drugs are routinely used for the treatment of diseases and sometimes applied preventatively to combat microbial pathogens. This strategy is responsible for the emergence and spread of antimicrobial resistance, mass killing of environmental/beneficial bacteria, and residual effects in humans. As an alternative, the administration of probiotics has gained acceptance for disease control in aquaculture. Probiotics have been found to improve growth, feed utilization, immunological status, disease resistance, and to promote transcriptomic profiles and internal microbial balance of host organisms. The present review discusses the effects of single and multi-strain probiotics on growth, immunity, heamato-biochemical parameters, and disease resistance of the above-mentioned finfishes. The application and outcome of probiotics in the field or open pond system, gaps in existing knowledge, and issues worthy of further research are also highlighted.