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High Performance Liquid Chromatography를 이용하여 시판되고 있는 고추씨 기름의 Capsaicin 정량
장일호,노재범,박성은,김진희,이치호 한국축산식품학회 2004 심포지움 및 학술발표회 Vol.- No.34
최근 여러 연구보고에 의하면 capsaicin은 항암, 진통 효과 등을 갖고 있는 것으로 알려져 있으며, 음식에 독특한 색, 맛, 향기를 제공하고 강한 항산화 작용으로 유지의 산패를 억제하는 역할을 하고 있다. 따라서 본 연구는 capsaicin을 고추씨기름을 이용하여 축산식품 조리 시에 첨가될 것을 기대하여 그 함량을 조사하였다. 연구의 결과 농협, (주)오뚜기, (주)사임당의 고추씨 기름이 수안보에서 구입한 고추씨기름보다 capsaicin의 함량이 적은 것으로 나타났다. 농협, (주)오뚜기, (주)사임당의 고추씨기름은 정제와 탈취공정을 거치면서 capsaicin의 함량이 줄어든 것으로 사료되어 정제와 탈취공정 시에 capsaicin의 함량이 줄어들지 않게 하는 방안의 모색이 필요하다.
장일호,백승준,정은진,손영갑,Chang, Il-Ho,Back, Seung-Jun,Jung, Eun-Jin,Son, Young-Kap 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.2
The burning interruption between the initiator and the delay column in a Zr-Ni K1 delay system used for a K510 fuze occurs with long-time storage. About 10 % failure probability of 15-years stored delay systems shows the failure mode in open literature. This paper shows storage lifetime improvement results for the delay system through changing the single-base delay column into double-base ones and controlling the manufacturing processes especially the initial inclusion of humidity. The double-base delay columns was implemented by inserting one delay column of fast burning rates between the initiator and the previous delay column of slow burning rates. Accelerated aging tests of the delay systems with double-base columns, and then the firing tests were performed to evaluate the improved lifetime. The double-base delay columns shows improved storage lifetime of the delay system through preventing the failure mode.
저장수명 연구를 통한 백색 연막수류탄(KM8)의 공정관리 효율화
장일호,홍석환,백승준,손영갑,Chang, Il-Ho,Hong, Suk-Hwan,Back, Seung-Jun,Son, Young-Kap 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.5
A white smoke hand grenade, KM8 is used to make smoke screen in order to provide visual field interceptions or signals. The grenade fails when its time to emit smoke is longer than the specified emission time so that the smoke concentration becomes lighter. This paper considered failure in smoke emission time, and evaluated its storage lifetime. The main objective of this paper is to modify the present specification limits of smoke emission time for the efficient process control in manufacturing, through analyzing effect of its specification change on the storage lifetime, based on the lifetime evaluation results. Accelerated degradation test was performed and then failure in smoke emission time was reproduced from the test. And estimated storage lifetimes from the accelerated test results was compared to evaluated lifetimes of grenades using the ASRP data. Past process testing results of the grenade in manufacturing were analyzed in this paper. Then, each storage lifetime for the specifications, ${\pm}3$ and ${\pm}5$ in seconds, extended from the current specification in manufacturing were estimated using the past testing results, and compared to one another.
열화데이터를 이용한 자색 연막수류탄(KM18)의 저장수명 평가
장일호,홍석환,장현정,손영갑,Chang, Il-Ho,Hong, Suk-Hwan,Jang, Hyun-Jeung,Son, Young-Kap 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.2
A violet smoke hand grenade(KM18) is used to generate signals. The grenade is considered to fail when its smoke emission time is longer than the specified one so that its smoke concentration becomes lighter. Accelerated degradation test for the grenade was performed, and then failure in smoke emission time was reproduced from the test. Stress for the degradation test was selected as temperature/humidity from the pre-test results. Degraded data of emission time from the accelerated test were analyzed through applying a distibution-based degradation model. Then, Peck Model was applied to predict the storage life under field conditions. In addition, the predicted storage life was compared with that of ASRP(Ammunition Stockpile Reliability Program).
무기 안정제 $CaCO_3$ 첨가에 따른 단기 추진제의 저장 수명에 관한 연구
장일호,조기홍,Chang, Il-Ho,Cho, Ki-Hong 한국군사과학기술학회 2007 한국군사과학기술학회지 Vol.10 No.3
Single base propellant using a nitrate ester compound NC decomposes naturally during storage time. Therefore, the research for storage life extension is necessary to single base propellant. In this research, $CaCO_3$ inorganic stabilizer had been added into single base propellants up to 0.3%, and the accelerated aging test of the propellant was started. And then, with applying the Arrhenius equation, the storage life of the test of the propellant was contrasted with that of reference propellant. As a result, the storage life of the propellant containing $CaCO_3$ inorganic stabilizer was about twice longer than the reference propellant.