육군 초임장교의 KCTC전투훈련이 직무만족에 미치는 영향 -자기효능감의 매개효과를 중심으로-

홍창영 ( Hong Chang Young ),박효선 ( Park Hyo Seon ) 미래군사학회 2023 한국군사학논총 Vol.12 No.4

본 연구의 목적은 육군 초임장교들의 전장실상 체험훈련이 야전부대 부임 후 직무만족에 미치는지를 자기효능감의 매개효과를 중심으로 실증적으로 분석하는 것이다. 현재 초임장교들은 야전부대에 부임하여 가장 어려워하는 부분이 경험부족으로 인한 자신감 결여와 부대관리와 지휘통솔 방법 등에 대한 두려움 등이다. 특히, 코로나 사태로 소대장 전후임자와의 인수인계와 지휘실습도 폐지한 상황에서 야전부대 부임 후 각종 훈련 등 소대장으로서의 임무수행에 애로를 호소하고 있다. 이에 육군에서는 2021년도부터 병과학교 보수교육 간 KCTC 전투훈련을 시행하게 되었으며, 전장실상체험과 소부대 전투지휘능력 숙달 등 소대장으로서의 자신감과 훈련노하우 습득 등 현장지휘 능력 배양에 중점을 두고 있다. 이러한 관점에서 2021, 2022년도 초임장교들을 대상으로 실시한 KCTC전투훈련을 독립변수, 자기효능감을 매개변수, 직무만족을 종속변수로 설정하여 실증연구를 실시하였다. 연구결과 첫째, KCTC 전투훈련이 직무만족에 긍정적인 영향을, 둘째, KCTC 전투훈련이 자기효능감에 긍정적인 영향을, 셋째, 자기효능감이 직무만족에 긍정적인 영향을, 넷째, KCTC 전투훈련이 직무만족에 영향을 미치는데 있어서 자기효능감이 매개역할을 한 것으로 나타났다. 따라서 초임소대장의 직무만족을 높이기 위해서는 소대장으로서 자신감과 자기효능감을 향상시킬 수 있는 KCTC 전투훈련과 같은 초임장교 과학화 체험식 훈련제도의 지속 유지 및 보완이 필요하다. The purpose of this study is to empirically analyze whether the battlefield practical experience training of new army officers affects job satisfaction after field unit appointment or how it plays a role in self-efficacy and performance change. Currently, the most difficult part of new officers' appointment to the field unit is their lack of confidence due to lack of experience and their fear of how to manage and command the unit. In particular, they are complaining of difficulties in performing their duties as a platoon leader, such as various training, after taking over the position of the field unit, in the situation where the transfer and command practice with the person in charge before and after the platoon leader have been abolished due to the COVID-19 incident. As a result, the Army has been conducting KCTC combat training between military school maintenance education since 2021, focusing on cultivating on-site command skills such as battlefield practical experience and mastery of platoon combat command skills and training know-how. From this point of view, an empirical study was conducted by setting KCTC combat training conducted for new officers in 2021 and 2022 as an independent variable, self-efficacy as a parameter, and job satisfaction as a dependent variable. As a result of the study, first, it was found that KCTC combat training had a positive effect on job satisfaction, second, KCTC combat training had a positive effect on self-efficacy, third, self-efficacy had a positive effect on job satisfaction, and fourth, KCTC combat training had a mediating role. Therefore, in order to increase the job satisfaction of the first-time platoon leader, it is necessary to maintain and supplement the first-time officer science experience training system, such as KCTC combat training, which can improve confidence and self-efficacy as a platoon leader.

폴리염화비페닐류의 생분해 우수 백색부후균 선발 및 분해율 분석

홍창영 ( Chang Young Hong ),곽기섭 ( Ki Seob Gwak ),이수연 ( Su Yeon Lee ),김선홍 ( Seon Hong Kim ),최인규 ( In Gyu Choi ) 한국목재공학회 2010 목재공학 Vol.38 No.6

In this study, the possibility of biodegradation of polychlorinated biphenyls (PCBs) by various white rot fungi was evaluated, and outstanding white rot fungi for the degradation of PCBs were selected. Seven white rot fungi were used to degrade Aroclor 1254 and 1260, which are widely considered to be toxie and difficult to degrade. And the degradation rates of Aroclors by selected white rot fungi were performed by GC analysis. Through the resistance test of white rot fungi on different concentrations of PCBs, the inhibition of mycelial growth of Cysttdodontia isubellina was much less than that of others and this fungus grew faster than others, relatively. Based on this result, it was considered that C isubellina was selected as degrading fungus for Aroclors. As a result of biodegradation rate of Aroclors by Cystidodontia isubellina, the degradation rate of Aroclor 1254 was reached to 5757% in 13 days, which showed very high degradation rate. Also the degradation rate of Aroclor 1260 by C isubellina had a tendency of increasing along with increasing incubation day. Maximal degradation rate of Aroclor 1260 was 49.43% at 13 days. Based on this results, it indicated that in comparison with a previous study, high degradation rate was obtained by C isubellina.

Ceriporia sp. ZLY-2010에 의한 폴리염화비페닐류의 생분해: 균체 외 효소활성 및 cytochrome P450 monooxygenase 영향

홍창영 ( Chang Young Hong ),곽기섭 ( Ki Seob Gwak ),이수연 ( Su Yeon Lee ),김선홍 ( Seon Hong Kim ),정한섭 ( Han Seob Jeong ),최인규 ( In Gyu Choi ) 한국목재공학회 2011 목재공학 Vol.39 No.6

In this study, to determine the ligninase activity related to the PCBs degradation of Ceriporia sp. ZLY-2010, the protein contents and manganese peroxidase (MnP) and laccase activities during cultivation on shallow stationary culture (SSC) medium were observed. 4 PCB congeners were selected depending on the number of chlorine substituted on biphenyl. Furthermore, to examine the effects of cytochrome P450 monooxygenase, the inhibition of cytochrome P450 monooxygenase was evaluated by measuring the biodegradation rate when inhibitor such as 1-aminobenzotriazole was added. The extracellular protein contents were affected by PCB congeners in culture media. The total protein in the culture medium showed the biggest differences between the samples containing 2,2`,4,4`,5,5`-hexachlorobiphenyl and the control. On the other hand, MnP and laccase activity showed dominant increases within samples containing 4,4`-dichlorobiphenyl and 2,3`,4`,5-tetrachlorobiphenyl. Cytochrome P450 monooxygenase was inhibited by adding inhibitor, 1-aminobenzotriazole in low concentration. Only 2.73% of 2,3`,4`,5-tetrachlorobiphenyl was degraed on day 1, and biodegradation of 2,2`,4,4`,5,5`-hexachlorobiphenyl was inhibited as well, showing about 20% of biodegradation rate.

Abortiporus biennis에 의한 유기용매 리그닌의 생물학적 변환과 환원제 첨가에 따른 구조 변화

홍창영 ( Chang Young Hong ),박세영 ( Se Yeong Park ),김선홍 ( Seon Hong Kim ),이수연 ( Su Yeon Lee ),유선화 ( Sun Hwa Ryu ),최인규 ( In Gyu Choi ) 한국목재공학회 2016 목재공학 Vol.44 No.1

The main goal of this study was to investigate biomodification mechanism of lignin by white rot fungus, Abortiporus biennis, and to depolymerize ethanol organosolv lignin for industrial application. In nitrogen-limited culture, A. biennis polymerized mainly lignin showing a rapid increase of molecular weight and structural changes depending on incubation days. At the initial incubation days, cleavage of ether bonds increased phenolic OH content, while the results were contrary in of the later part of the culture. Based on these results, ascorbic acid as a reducing agent was used to induce depolymerization of lignin during cultivation with white rot fungus. As a result, the degree of increase of average molecular weight of lignin was significantly declined when compared with those of the ascorbic acid free experiment, although the molecular weight of fungus treated sample slightly increased than that of control. Furthermore, lignin derived oligomers in culture medium were depolymerized with the addition of ascorbic acid, showing that the average molecular weight was 381 Da, and phenolic OH content was 38.63%. These depolymerized lignin oligomers were considered to be applicable for industrial utilization of lignin. In conclusion, A. biennis led to the polymerization of lignin during biomodification period. The addition of ascorbic acid had a positive effect on the depolymerization and increase of phenolic OH content of lignin oligomers in medium.

Remazol Brilliant Blue R 탈색능과 리그닌 분해 효소시스템을 이용한 유기용매 리그닌 생분해 우수 균주 선별

홍창영 ( Chang Young Hong ),김호용 ( Ho Yong Kim ),장수경 ( Soo Kyeong Jang ),최인규 ( In Gyu Choi ) 한국목재공학회 2013 목재공학 Vol.41 No.1

In this study, outstanding white rot fungi for biodegradation of organosolv lignin were selected on the basis of their ligninolytic enzyme system. Fifteen white rot fungi were evaluated for their ability to decolorize Remazol Brilliant Blue R (RBBR) in SSC and MEB medium, respectively. Six white rot fungi (Ceriporiopsis subvermispora, Ceriporia lacerate, Fomitopsis insularis, Phanerochaete chrysosporium, Polyporus brumalis, and Stereum hirsutum) decolorized RBBR rapidly in SSC medium within 3 days. The protein contents as well as the activities of manganese peroxidase (MnP) and laccase for 6 selected fungi were determined on the SSC medium with and without organosolv lignin. Interestingly, extracellular protein concentrations were determined to relative higher for S. hirsutum and P. chrysosporium in the presence of organosolv lignin than others. On the other hands, each fungus showed a different ligninolytic enzyme pattern. Among them, F. insularis resulted the highest ligninolytic enzyme activities on incubation day 6, indicating of 1,545 U/mg of MnP activity and 1,259 U/mg of laccase activity. In conclusion, STH* and FOI were considered as outstanding fungi for biodegradation of organosolv lignin, because STH* showed high extracellular protein contents and ligninolytic enzyme activities over all, and ligninolytic enzyme activities of FOI were the highest among white rot fungi used in this study.

전나무 정유의 항진균 효과와 유효성분의 시너지효과 평가

김선홍 ( Seon Hong Kim ),이수연 ( Su Yeon Lee ),조성민 ( Seong Min Cho ),홍창영 ( Chang Young Hong ),박미진 ( Mi Jin Park ),최인규 ( In Gyu Choi ) 한국목재공학회 2016 목재공학 Vol.44 No.1

This study was to investigate the antifungal activity of A. holophylla essential oil against dermatophytes, such as Epidermophyton floccosum, Trichophyton mentagrophytes and Trichophyton rubrum, and to determine the potential effective compound as dermatitis treatment. To evaluate the potential antifungal activities of A. holophylla essential oil and its fractions, paper disc diffusion and agar dilution method tested with morphological observation. Also, their major constituents were analyzed by GC/MS. To determine synergic effects of active ingredient from A. holophylla essential oil were carried out by checkerboard microtiter plate testing. The morphological changes of the dermatophytes exposed to active fraction G4 were observed by electron microscopes. As the results, the highest activities were identified in the fraction containing α-bisabolol. A mixture of α-bisabolol and bornyl acetate showed the synergy effects, expressing high potential effects. Also, morphological observation using electron microscopes showed a dramatic changes of cell membrane of E. floccosum and T. rubrum exposed to fraction G4 containing α-bisabolol. In conclusion, A. holophylla essential oil and its constituents were expected to be used as antifungal agent or raw material for dermatitis therapy.

피부사상균 균사의 형태학적 변화를 통한 일본잎갈나무 정유의 항진균 활성 효과

김선홍 ( Seon Hong Kim ),이수연 ( Su Yeon Lee ),홍창영 ( Chang Young Hong ),장수정 ( Soo Kyeong Jang ),이성숙 ( Sung Suk Lee ),박미진 ( Mi Jin Park ),최인규 ( In Gyu Choi ) 한국목재공학회 2013 목재공학 Vol.41 No.3

This study was to investigate the antifungal activity of Larix kaempferi essential oil against dermatophytes, Epidermophyton floccosum, Tricbopbyton mentagropbytes and Tricbopbyton rubrum. The active components of L. kaempferi against dermatophytes were determined (cha?racterized by GC-MS), and the morphological changes of the dermatophytes exposed to the L. kaempferi essential oil were observed by electron microscope. Main component of L. kaempferi essential oil was (-)-bornyl acetate. In antifungal activity tests, MIC of L. kaempferi crude oil was 125 ppm on every fungi and 100% (agar dilution method) at more than 500 ppm. By using SEM and TEM, the fungal morphology of E. floccosum exposed to the L. kaempferi essential oil was different from that of normal hyphal morphology. Hyphae exposed to the L. kaempferi essential oil was damaged with distorted and collapsed surfaces. In addition, there were destruction and disorganization of organelles in cytoplasm and collapse of cell membrane. Active antifungal components from L. kaempferi essential oil were identified as terpene alcohol compounds like (-) -r-muurolol, (+)-terpinen-4-ol, α-terpineol, and α-cadinol.

약산 전처리 조건에 따른 소경 신갈나무 유래 푸르푸랄 및 레불린산의 함량 변화

장수경 ( Soo Kyeong Jang ),정한섭 ( Han Seob Jeong ),홍창영 ( Chang Young Hong ),김호용 ( Ho Yong Kim ),류가희 ( Ga Hee Ryu ),여환명 ( Hwanmyeong Yeo ),최준원 ( Joon Won Choi ),최인규 ( In Gyu Choi ) 한국목재공학회 2015 목재공학 Vol.43 No.6

In this study, dilute acid pretreatment was operated using small-diameter Quercus mongolica for evaluating the yield change of furfural and levulinic acid depending on pretreatment factors. The dilute acid pretreatment was conducted depending on reaction temperature (140-180℃), reaction time (10-30 min), and sulfuric acid concentration (0-2%, w/w). Then, glucose, XMG (xylose + mannose + galactose), furfural, and levulinic acid contents in the liquid hydrolyzate were measured and analyzed after pretreatment. Glucose content increased to 16.02% as reaction temperature, reaction time, and sulfuric acid concentration increased, but it decreased at the sulfuric acid concentration of 2% (reaction temperature: > 170℃, reaction time: > 20 min). On the other hand, reaction temperature had a strong influenced on XMG content, and XMG content decreased to 1.63% through increasing of reaction temperature and sulfuric acid concentration, but XMG content was less affected by changes of reaction time. Furfural content increased with the increase of reaction temperature, reaction time, and sulfuric acid concentration, and maximum furfural content was 7.61% (reaction temperature: 180℃, reaction time: 20 min, sulfuric acid concentration: 1%) based on a weight of raw material, while furfural content was dropped in more severe condition than in maximum furfural content condition. Levulinic acid content also increased with higher reaction temperature, reaction time, and sulfuric acid concentration. Especially, the sharp increase of levulinic acid content was observed above 170℃, and maximum levulinic acid content was 10.98% (reaction temperature: 180℃, reaction time: 30 min, sulfuric acid concentration: 2%). However, less than 1% of furfural and levulinic acid content was obtained in non-acidic catalyst condition that in whole conditions of reaction temperature and reaction time.

삼나무 정유의 표재성 진균에 대한 항진균 활성

김선홍 ( Seon Hong Kim ),이수연 ( Su Yeon Lee ),홍창영 ( Chang Young Hong ),정한섭 ( Han Seob Jeong ),박미진 ( Mi Jin Park ),최인규 ( In Gyu Choi ) 한국목재공학회 2012 목재공학 Vol.40 No.4

In this study, the antifungal activity of Cryptomeria japonica essential oil against superficial and allergic fungi, Trichophyton schoenleinii, Trichophyton tonsurans, Trichophyton mentagrophytes, Trichophyton rubrum, Epidermophyton floccosum, and Aspergillus fumigatus, was evaluated for determining the potential compound as dermatitis treatment. Minimum Inhibitory Concentration (MIC) measurement, TLC bioassay and agar dilution methods were used for determining the antifungal activity of crude essential oil and its fractions from C. japonica. Also, their major constituents were analyzed by GC/MS. The MICs were below 500 ppm at all superficial fungi, and spot 1 of C. japonica essential oil showed highly effective antifungal activity by TLC bioassay. In antifungal activity by agar dilution methods, crude oil showed high antifungal effect at more than 500 ppm and fraction D was significantly effective at even 100 ppm except for A. fumigatus. The major compounds of spot 1 and fraction D of C. japonica oil determined by GC/MS were elemol, γ-eudesmol, and β-eudesmol, which could be used as atopic dermatitis treatment material.

추출 방법에 따른 삼나무 잎 추출물의 항산화 활성 평가

김선홍 ( Seon-hong Kim ),이수연 ( Su-yeon Lee ),조성민 ( Seong-min Cho ),홍창영 ( Chang-young Hong ),박세영 ( Se-yeong Park ),박미진 ( Mi-jin Park ),최인규 ( In-gyu Choi ) 한국목재공학회 2017 목재공학 Vol.45 No.5

This study was to investigate the antioxidant activities of Cryptomeria japonica leaves extracts such as essential oil, methanol extract and hot water extract and to evaluate its potential as a natural antioxidant. Antioxidant activities of extracts were evaluated by DPPH radical scavenging activity, FRAP activity, zanthin oxidase inhibitory activity, and iron ion chelate activity, comparing with the positive controls. According to the results, methanol and hot water extracts showed higher antioxidant activities than essential oil. This fact suggested that terpenoids have lower antioxidant effect than phenolic compounds which were found in methanol and hot water extracts. Especially, acetone and water soluble fractions of methanol extract and ethanol fraction of hot water extract contained a lot of phenolic compounds and hydroxyl group, indicating that many hydroxyl groups and glycosidic bonds showed higher antioxidant effect than the other fractions. These results can suggest that the phenolic compounds which contained hydroxyl group or glycosidic bonds have a certain role for effective antioxidant activities.