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Augustine Omoniyi Ayeni,Oluranti Agboola,Michael Olawale Daramola,Bianca Grabner,Babalola Aisosa Oni,Damilola Elizabeth Babatunde,Joseph Evwodere 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.1
Corn cob lignocellulosic biomass is one of the useful precursors for the alternative production of fuels and chemicals. Understanding the kinetics of enzymatic conversion of corn cob through kinetic models could provide indepth knowledge and increase the predictive ability for process design and optimization. In this study, models based on the semi-mechanistic rate equations, first-order decay exponential function of time for adsorbed enzymes, structural and diffusion coefficient for adsorption were used to estimate kinetic parameters for the enzymatic conversion of alkaline peroxide oxidation (APO) pretreated corn cob to sugar. Fitting a first-order inactivation model of adsorbed cellulases to account for experimental hydrolysis data, the apparent hydrolysis rate constant (k2=29.51 min1), the inactivation rate constant (k3=0.269min1), and reactivation rate constant (k4=0.0048min1) were estimated. Regressed values of apparent maximum rate, Vmax, app, for adsorbed enzymes reduced appreciably with time to more than 98% at 96 h. The diffusion limit model showed that the diffusion resistance increased with increasing enzyme concentrations.
Augustine Omoniyi Ayeni,Ram Awtar Pandey,James Abiodun Omoleye,Sandeep Mudliar,Fredrick Kofi Hymore 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.7
Enzymatic hydrolysis and fermentation methods were evaluated on alkaline peroxide pretreated shea treesawdust conversion to ethanol. Optimum pretreatment conditions of 120 oC reaction temperature, 30min reaction time,and 20 mL L−1 of water hydrogen peroxide concentration (1%(v/v)H2O2) solubilized 679 g kg−1 of hemicellulose and172 g kg−1 of lignin. 617 g kg−1 cellulose was retained in the solid fraction. The maximum yield of reducing sugar withoptimized enzyme loadings by two enzyme preparations (cellulase and β-glucosidase) was 165 g kg−1 of dry biomass. The ethanol yield was 7.35 g L−1 after 72 h incubation period under the following conditions: 2% cellulose loading,enzyme concentration was 25 FPU (g cellulose)−1 loading, yeast inoculums was 10% (v/v), 32 oC, and pH 4.8. Thepretreatments gave information about the hindrances caused by lignin presence in lignocellulosic materials and thathemicelluloses are better hydrolyzed than lignin, thereby enhancing enzymatic digestibility of the sawdust material.
( Augustine M. K. Choi ) 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.2
Claude Bernard, a brilliant French physiologist, had proclaimed that hospitals are entrance to scientific medicine and medical science is a laboratory where one can seek explanations of life in the normal and pathological states by means of experimental analysis. Hence, in medicine, the desire to combine scientific observation with a clinical perspective has a long tradition with roots going back to classical antiquity. Physician scientists are uniquely capable of asking clinically relevant questions in research settings and bringing rigorous scientific inquiry to the care of patients. We will review both tangible and intangible reasons to pursue biomedical research among physicians, and how the advancements in research have impacted the healthcare and well being of patients. We will also review the similarities and differences in the infrastructure of Korean and Amercian physician scientist training during medical school and clinical training, and the impact in the respective healthcare system.
Augustine TSANG Hing-to 신학과사상학회 2011 가톨릭 신학과 사상 Vol.- No.67
Matteo Ricci was reputed as a great man of dialogue with other cultures and religions, but he was also, above all, a great missionary of proclamation of the gospel of Jesus Christ. The most important book he has written in Chinese is The True Meaning of the Lord of Heaven, in which he has in-depth theological dialogue with Chinese scholars with regard to some most central tenets of Catholic faith. He engaged in these dialogues which quite often involved frank criticism of Buddhism, Taoism and Neo-Confucianism, for the purpose of leading his dialogue partners to the Truth, and eventually conversion to the Catholic faith. Ricci was very friendly with the Chinese, but he above all wanted to be their friend in the Lord. Ricci’s missionary spirituality of truth can then be a very relevant lesson for Catholics’ self-realization in their own mission ad gentes today. Dialogue should not replace proclamation, respect for others and their cultures and religions should not downplay the importance of Jesus Christ as the only Savior of the world, and should not make the various doctrines of other religions equal to the doctrines of Christian religion. The recent Magisterium’s teachings, as well as Ricci’s own example, emphasize this aspect of truth which is of paramount importance for today’s evangelization.