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성좌경,성좌경,김우진,김가은 한국토양비료학회 2022 한국토양비료학회지 Vol.55 No.4
Yearly increasing production of food waste is a great concern in Korea, and thus the use of processed-foodwaste as an alternative and/or additive resource to chemical fertilizer has been widely expanding. The foodwaste like a livestock manure includes abundant nutrients to promote crop growth and development, and theeffect on crop growth and yield was confirmed from a variety of studies. In this study, we focused on investingprimary metabolic perturbation affected by the application of food waste-livestock manure compost (FW LMC) for rice production. The experiment employed six different levels of fertilization; no fertilization (NF),standard fertilization (SF, RDA guide), soil diagnosis fertilization (SDF) and SDF + FW-LMC (three differentapplication levels, 1, 1.5 and 3.0 Mg ha-1). The rice (cv. Saechucheongbyeo) samples were taken at headingstage, carefully divided into the leaf blades and grains, and the targeted primary metabolites were profiled fromthe leaf blades and grains by GC-TOFMS. Glucose and fructose significantly declined in the leaf blade, andglucose, mannose and galactose tended to decrease in the grain, by contrast, sucrose was significantly greater. Pyroglutamic acid (increase in both organs), asparagine (increase in the leaf blade), β-alanine (increase in bothorgans) and tryptophan (increase in the leaf blade/decrease in the grain) were greatly perturbated. From theresults, in terms of primary metabolism-based rice growth, it is summarized that the addition of FW-LMC inchemical fertilization (SF and SDF) could perturb primary metabolism, and affect not only vegetative growth ofrice plants but also grain quality. Finally, the further study should be focused on understanding how the greaterinput of fertilization like the FW-LMC contributes grain qualities such as protein and amylose contents at theharvest stage.
성좌경,최삼권,Seong, Chwa-Kyeong,Choi, Sam-Kwon 대한화학회 1957 대한화학회지 Vol.4 No.1
The organic titanium compounds, $Ti(OR)_4\;and\;Cl_2Ti(OR)_2$ were prepared by adding theoretical amounts of $TiCl_4$ to ROH in the medium of $CCl_4$. Among the compounds of the above two types, the former $Ti(OR)_4$was polymerized by refluxing them with R·OH and water at ordinary temperature and the latter, $Cl_2Ti(OR)_2$, by adding water to them.
酸化還元樹脂에 關한 硏究 (第一報) Hydroquinone-Formaldehyde Resin 에 關하여
성좌경,김용준,Sung, Chwa-Kyung,Kim, Yong-Joon 대한화학회 1957 대한화학회지 Vol.4 No.1
Hydroquinone-formaldehyde resin prepared from hydroquinone, formaldehyde and hydrochloric acid as a catalyst was shown to be oxidized with ferric chloride solution and regenerated by stannous chloride solution. The influence of various conditions of preparation on the capacity of oxidation was studied. Results show that the concentration of a solution of hydroquinone has not any effects below 14 parts of water to 1 part of hydroquinone, by the after-heat-treatment for 5-6 hours at 100-120 deg. C. the capacity of oxidation is exhibited a maximum, and decreased as the mole ratio of hydroquinone to formaldehyde increase. The optimum conditions for the preparation of this resin are as follows: hydroquinone 1 part to distilled water 10 parts, mole ratio of formaldehyde 1.2 to hydroquinone 1, and 5 hours of after-heat-treatment at 120 deg. C. The maximum capacity under the above conditions is 13.99 meq/g-ersin.
성좌경,송범헌,김홍식,이철운,김태완 한국토양비료학회 2004 한국토양비료학회지 Vol.37 No.1
자외선 처리에 의한 세포 내 소기관의 구조적 변화를 관찰하기 위하여 수행하였다. 광학현미경을 통한 인산기를 가진 광합성산물은 자외선 처리시간의 증가와 함께 급격히 감소하였다. 주사전자현미경을 통한 엽 표면의 큐티클층은 자외선 처리 6시간 이후부터 파괴되기 시작하였다. 자외선에 의한 세포 수분압의 변화는 엽록체의 틸라코이드막을 파괴하였으며, 표피세포의 두께를 증가시켰는데 특히 1차 세포벽은 파괴되었으며 2차 세포벽은 리그닌의 합성 및 축적으로 인해 무처리에 비해 약 2배정도 두꺼워졌다.
성좌경,Seong Jwa Gyeong 대한화학회 1949 대한화학회지 Vol.1 No.1
最近 2-Amino-1-nitrophenol 및 Alkyl ether의 甘味에 對한 News가 傳하여지고 있어 特히 n-Propylether는 의 4,000培의 甘味를 가졌다고한다. 本報에서는 그 合成條件을 檢사하였다. 同時에 2-Amino-4-nitro-toluene 2-Amino-4-nitro benzoic acid를 合成하여 그 甘味를 試驗하였다.