In this study, the effect of difference in gas phase media (between nitrogen and air) used for standard gas preparation was evaluated with respect to relative recovery of carbonyl compounds (CC). To this end, calibration analysis was carried out using gaseous CC standards (with the two media) containing five different CCs (acetaldehyde (AA), propionaldehyde (PA), butyraldehyde (BA), isovaleraldehyde (IA), and valeraldehyde (VA)). Derivatization of CCs was made, and the carbonyl hydrazones eluted via acetonitrile were analyzed by reverse phase HPLC for UV detection. As a result, the CC standards in N2 medium showed about 10% higher recovery than that of air medium. However, the difference in their relative recovery is in most cases not statistically significant. Consequently, it is concluded that the difference in gaseous media like N2 or air is unlikely to affect derivatization efficiency of CCs.

한국 사회의 급속한 고령화로 인해 여러 가지 발생하는 문제 중 노인범죄의 증가라는 현상이 최근 들어 두드러지게 나타나고 있다. 이러한 노인범죄는 신체적인 노화와 정서적인 소외를 경험하면서 사회적인 활동이 점차 감소되는 60세 이상의 노인이 저지르는 범죄를 의미하고 있다. 이러한 노인범죄는 2000년대 들어와 급격하게 증가하고 있으며, 그 비중이 점점 증가하고 있다. 특히 71세 이상의 고고령 범죄자가 증가하는 특징을 가지고 있다. 본 연구에서 노인범죄의 특성으로는 노인범죄는 인구구조의 변화에 따라서 변화하는 모습을 보여주고 있으며 노인범죄의 유형은 형법범과 특별법범이 나란히 증가세를 보여주는 것으로 나타났다. 노인범죄의 특징을 유형별로 살펴보면 강력범죄는 전체 노인범죄에서 차지하는 비율은 낮으나 그 빈도는 높게 증가하고 있고 재산범죄는 전체 노인범죄 중 가장 높은 비율을 차지하고 있으며 노인생활에서 가계의 소득, 금전적인 부족의 문제가 노인범죄로 이어지는 것을 보여준다. 폭행범죄는 빈도는 높지 않으나 노년기 이상심리인 공격성이나 경직성에서 그 상관관계를 연관 지을 수 있고 풍속범죄는 주로 도박과 복표에 관련된 범죄의 수가 빈도가 높은 것으로 나타났으며 노인여가의 문제와 직결된다고 할 수 있다. 따라서 이러한 노인범죄에 대하여 특정 범죄를 지목하여 조사하는 형태를 벗어나, 노인범죄의 전반적인 내용에 대해서 살펴보고 문제점을 해결하기 위하여 거시적 관점에서 노 인범죄를 살펴보았다. 현대 노인 범죄에 대한 해결방법으로는 첫 번째, 노인범 죄에 있어서 노인의 범죄 행위 자체를 다른 연령층에서 일어나는 범죄와 다르게 간주해서는 안 된다. 노인이 행했기’ 때문에 노인범죄를 편향된 시각으로 보는 것은 잘못된 것이며 노인범죄에 대한 명확한 기준이 필요하고 이에 대한 교정 복지적 대응도 필요하다. 두 번째, 노인범죄에 대한 예방차원의 정책적 접근이 필요하다. 상술한 노인범죄의 특성들을 바탕으로 예방차원의 정책 마련이 필요 하면 실효성 있는 정책방안이 제지되어야 한다.

In this study, the emission characteristics of landfill gas (LFG) were investigated with respect to reduced sulfur compounds (RSC) and elemental mercury. To describe their emission characteristics accurately, methane and dilution-to-threshold (D/T) ratio were also analyzed as reference. LFG samples were collected in three different pathways; (1) old landfill (LF), (2) new LF, and (3) composite from both LFs. Differences in RSC concentrations between two LFG samples were relatively insignificant in the case of H2S, CS2, and SO2. On the other hand, a significant reduction in CH3SH and DMS concentrations was observed from old landfill. The concentration data of Hg and methane showed a similar spatial trend between new and old LF, as seen from RSC. In general, a large quantity of trace gas pollutants came out from new rather than old LF. The correlation analysis indicated strong relationship between most sulfur compounds, while it is not for other components including Hg, CH4, and D/T ratio. It suggests that trace composition of LFG comply well with the maturity of landfill.

In this study, the emission characteristics of reduced sulfur compounds (RSC) including H₂S, CH₃SH, DMS and DMDS released via cooking were investigated. Cooking smoke samples were produced by two different cooking methods (fry and steam) and analyzed for direct comparison between three types of food (cabbage, clam and coffee bean). In general, a large quantity of RSC came out from fried foods relative to steamed foods. The conversion of RSC concentration to odor intensity (OI) showed OI values in the range of 2.54∼6.41 for fried foods and 1.23∼3.68 for steamed foods. The results of this study suggest that we need to develop and establish environmentally friendly cooking methods.

In this study, we evaluated the composition of smoke released from fish frying processes. We selected 4 fish types (mackerel (M), hairtail (H), croaker (C), and japanese mackerel (J)) which are commonly served in our daily diet and collected their smoke samples. The analysis was made to cover both toxic and hazardous volatile organic compounds (VOCs) that include benzene, toluene, p-xylene, methyl ethyl ketone, methyl isobutyl ketone, butyl acetate, and isobutyl alcohol. According to our analysis, the mean concentrations (ppb) of VOCs derived from all 4 fish types were 254.5 (benzene), 34.5 (toluene), 833.0 (MEK), 29.4 (MIBK). Benzene as the class one carcinogen was detected at fairly high levels from these fish smoke samples so as to exceed indoor emission standard. Considering that roasted fish is often included as one of the common diet items, we can confirm that the smoke released from cooking should be controlled to reduce the possibility of their exposure to human.

한국에서는 2006년까지는 오늘날 범죄자나 출소자에 대한 교정복지를 포함 한 사회복지의 모든 영역에서 놀랄만한 혁신적 패러다임을 가져오고 있는 사회적 기업이나 사회적 기업가정신의 개념에 관해서는 거의 논의 되지 않았다. 그러나 오늘날 사회적 기업에 관한 법적 형태의 전신이라고 할 수 있는 1991년의 이탈리아의 사회적 기업에 관한 법률이 제정된 이래 유럽각국은 물론 미국 등 선진국에서 활발하게 전개되고 있는 사회적 기업에 관한 패러다임은 이제 보편적인 시대의 조류이며 이런 시대의 조류에 부응하여 한국에서도 2007년에 와서 드디어 사회적 기업에 관한 법률을 제정하였고 현재는 지방자치단체마다 경쟁적으로 조례제정에 나설 만큼 중요성을 차지하게 되었다. 이런 추세에 부응하여 2010년 8월18일 법무부 장관은 오늘날 출소자의 높은 재범률의 중요한 원인으로서 출소자의 경제적 기반의 취약을 들고 이제 출소자를 위한 사회적 기업의 당위성과 실천을 위하여 법무부내에 타스크 포스팀을 구성하여 출소자를 위한 사회적 기업을 만들겠다고 발표하였다. 이 논문은 시의적절하게 이런 추세에 맞추어 교정복지차원에서 사회적기업의 필요성과 실천적 전략을 다루고 있다. 먼저 오늘날 출소자의 높은 재범률의 한 원인으로서 출소자들의 경제적 어려움과 낙인에 대하여 다양한 접근을 통하여 운론하였으며 출소자의 경제적 자립을 위한 기존의 갱생보호제도의 관료적인 문제점과 한계를 지적 하여 출소자의 경제 적 자립을 위하여 보다 다른 차원의 패러다임의 필요성을 언급하였고 그런 패러 다임이 바로 소외된 출소자를 고용하여 그들의 자립을 돕는 사회적 목적을 달성 하면서도 경영이익을 도모하는 기업적 측면을 동시에 가진다는 사회적 기업이란 점을 언급하였다. 그 다음으로는 사회적 기업에 관한 의의와 역사 및 배경 등 에 관하여 외국의 일반이론을 살펴 보고나서 우리나라의 사회적 기업의 제도화 와 발전과정 및 형태를 언급하여 이런 것들이 출소자를 위한 사회적 기업의 설 립에 어떤 영향과 시사점을 주는가를 살펴보았다. 그리고 현재 외국의 출소자에 대한 사회적 기업의 사례를 미국의 PHS사례와 영국과 이탈리아 등의 사례를 언급하고 미국식의 대기업과 연계된 출소자지원 사회적 기업의 필요성을 언급 하여 앞으로 출소자를 위한 사회적 기업에 시사점이 되도록 하였다. 결론적으로 출소자들의 재범률의 한 원인인 경제적 취약을 해결하기 위해서는 갱생보호제 도와 병행하여 출소자에 대한 사회적 기업의 필요성이 교정복지적 차원에서 절실함을 언급하였으며 나아가 출소자나 수형자에 대한 사회적 기업에서 진전하 여 외부통근수형자 등도 포함시킬 필요성을 언급하였으며 나아가서는 회복적 사법이념과 필자가 만든 “천정환의 복지적 사법론”에 부응하여 피해자도포함 하되 더소외된자들을 차별적으로 고용하는 회복복지적 사회적 기업의 필요성에 대하여 교정복지적 차원에서 독창적으로 운론하였다.

In this study, the QA/QC test for the combined application of DNPH cartridge – HPLC/UV method was investigated in the collection and analysis of formaldehyde in air using three types of DNPH cartridge samplers made by three independent manufacturers. For these experiments, gaseous standards of formaldehyde (FA) were prepared at 7 concentration levels that fell in the range of 44.1~3400 nmol/mol. According to our analysis, the levels of cartridge blank (0.13 ~ 0.26 ng) are found to be fairly high to require routine check up for each experiment. The recovery patterns of FA were highly comparable between different cartridge products, when standard gases are supplied in the concentration range up to 177 nmol/mol. All 3 types of DNPH cartridge exhibited highly similar recovery rates at concentrations below 1.7 ㎛ol/mol, while the maximum recovery was attained from the product B. The overall results of our study suggest that one should calibrate the samples in the optimal range of recovery with routine check up of blank values.

In this study, calibration characteristics of odorous amine compounds were investigated by gas chromatography (GC)-nitrogen phosphorous detector (NPD). To this end, three different amine compounds (methyl amine (MTA), dimethyl amine (DMA), and trimethyl amine (TMA)) were analyzed in a series of calibration experiments. As the first step, the liquid phase standards of these amines were calibrated at 5 concentration levels with the fixed standard volume (FSV) method. The results showed that response factors of three amines were in the order of TMA ＞ DMA ＞ MTA with their correlation coefficients (r) above 0.97. The results of FSV calibration also indicated that the analytical sensitivity of amines increased with reducing injection volume due to the decrease in matrix effect. However, when these compounds were calibrated by the fixed standard concentration (FSC) method, the results were not stable under most circumstances. In addition, the reliability of internal calibration approach was also tested using pyridine, nitrobenzene, and nicotine. When pyridine was used as internal standard of these amines, analytical reproducibility of amines was improved greatly compared to external calibration results (e.g., an improvement of 75% for DMA).

본 연구에서는 TiO2 나노입자로 표면침적된 polyethersulfone (PES) 정밀여과 분리막이 자연유기물로 인한 분리막 막힘현상(파울링)에 미치는 영향을 관찰하였다. TiO2 나노입자로 표면침적된 PES 정밀여과 분리막의 자연유기물 파울링 거동에 TiO2 나노입자의 결정구조와 용액의 pH 그리고 Ca+2이 미치는 영향을 관찰하였다. 연구결과, TiO2 나노입자로 표면 개질된 정밀여과 분리막은 자연유기물에 의한 파울링 현상을 현저하게 감소시킬 수 있음을 확인 할 수 있었다. 그러나 이와같은 현상은 TiO2 나노입자의 결정구조와 용액의 성상에 매우 의존하는 것으로 나타났다. 자연유기물 파울링의 감소는 결정구조가 상대적으로 불안정한 anatase TiO2 나노입자를 분리막에 표면침적 시, 용액 중 Ca+2이 존재하지 않을 때 상대적으로 높은 pH에서 효과적인 것으로 관찰되었다. 그러나 Ca+2의 첨가 시 이와 같은 효과는 높은 pH에서 더욱 증가할 수 있음을 확인할 수 있었다. 반면, 결정구조가 상대적으로 안정한 rutile TiO2 나노입자의 경우 자연유기물의 파울링 감소는 용액의 조성에 큰 영향을 받지 않는 것으로 나타났다.

In this study, we attempted to evaluate the relationship between dilution‐to‐threshold (D/T) ratio derived by air dilution sensory (ADS) test and the concentration levels of both individual odorant (using H₂S and acetaldehyde (AA)) and their mixture. For the purpose of our comparative study, we prepared both standard gases of two individual compounds and their mixture at 9 concentration levels. Each of all these samples were analyzed by ADS test, and the results were analyzed in relation to their odor intensity. The results of individual odorant samples showed the two contrasting characteristics of each individual compound. H2S generally showed sensitive detection at low concentration but less sensitive detection with increasing concentration. In contrast, AA showed fairly contrasting trend with slow increasing sensitivity. When the D/T ratios estimated from individual samples were used to predict those of mixed samples, the results were reflecting the mixed effects of the basic characteristics owned by each individual compound. As the lower and upper odor intensities of mixed samples were best reflected by AA and H2S, respectively, the D/T ratio of mixed samples complied with the larger D/T values of each compound at a given odor intensity.

In this study, the calibration characteristics of six new odorant VOCs along with two reference compound were evaluated based on GC-MS (SIM). For the proper evaluation of the GC/MS method, calibration of 7 VOCs were made both by the SPME and direct injection (DI). The minimum detection limit (MDL) of those VOC determined by SPME method fell in the range of 0.31∼0.38 ppb while those of DI from 6.18∼14.3 ppb. The analytical performance of our SPME/GC-MS method was compared against those tested previously by other study groups. Although more efforts are needed to establish the reliability of our SPME/GC-MS method, the method adapted in this study can be recommended as one of the standard methods for the analysis of the target VOCs in this study to settle formal experiment methods.

In this study, deodorizing efficiency of three deodorant products (1) A = ClO₂ Gel + charcoal, (2) B=Charcoal Gel, and (3) C = Gel (for Kimchi)) was investigated. For these experiments, a total of 15 odorants (4 reduced sulfur compounds, 2 volatile organic compounds, 7 carbonyl compounds, and 2 nitrogenous compounds) were investigated for a short term period. For the comparative analysis, 2 food types with strong odor properties (Kimchi and Fish) were selected and investigated. The analytical results were compared with respect to the blank sample (without deodorants) after normalization. Hence, if normalized concentration values are lower than unity one can assume that sample has positive deodorizing efficiency. The results of deodorant experiments indicate that the effects of the most common deodorant products are not effective enough to remove offensive odorants. However, the selection of deodorant products appears to be important, as they have very specific deodorizing efficiencies for certain compounds.

In this study, the emission characteristics of reduced sulfur compounds (RSC) were investigated under decaying conditions using 3 food types with strong odor properties: (1) Kimchi (KC), (2) Fresh fish (FF), and (3) Salted fish (SF). The concentrations of RSC from food decaying samples were measured 5 times during the full study period over 15 days. All the analysis of RSC were made by gas chromatography/pulsed flame photometric detector (GC/PFPD) combined with air server/thermal desorber (AS/TD). According to our analysis, CH₃SH recorded the highest mean concentration (53.8 ppb) out of all RSCs investigated concurrently. Comparison between 3 food types showed that KC had the highest odor strength in primary stage, although it showed a notable decrease through time. On the other hand, FF and SF maintained generally low RSC concentrations in the beginning stage, but they showed large increases in emission concentrations with time. Thus, the results indicate that the relative pattern of RSC emissions tends to vary greatly with food types rather than RSC type.

In this study, the recovery rate of thermal desorbing (TD) method was investigated in relation to sample concentration and loading volume of reduced sulfur compounds (RSC). All the analysis of RSC was made by gas chromatography/pulsed flame photometric detector (GC/PFPD) combined with air server/thermal desorber (AS/TD). The RSC measurement data were obtained by loading gaseous RSC standards prepared at 4 concentrations (10, 20, 50, 100 ppb) at 6 injection volumes (40, 80, 200, 400, 800, and 1200 mL). The recovery rates of each RSC were computed in terms of relationship between expected vs. measured values. According to our analysis, the following conclusions can be drawn. First, the results were less stable at short loading time (1 and 2 min at 40 mL/min) with reduced recovery rate, especially with light RSCs (H₂S and CH₃SH). On the other hand, at sufficiently high loading volume, their quantification was limited by off-scale peaks (at a near 50 ng) due to the breakthrough of cold trap in TD. Thus, the optimization of TD-based analysis may be considered as a prerequisite for analyzing the RSC in a reliable manner.