• 한국사회복지학
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• 제68권4호
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• pp.97-118
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• 2016

본 연구는 산업재해 이후 직업에 복귀한 산재근로자의 일자리만족도 영향요인을 원직장복귀자와 타 직장재취업자 간의 비교를 중심으로 검증하는 것을 목적으로 한다. 이를 위해 근로복지공단의 산재보험패널 1차자료(2014)를 활용하여 임금을 목적으로 사업주에게 고용된 산재근로자 1,333명(원직장복귀 693명, 타직장재취업 640명)을 대상으로 각각 다중회귀분석을 실시하였다. 주요 분석결과는 다음과 같다. 첫째, 타직장재취업자는 원직장복귀자에 비해 일자리만족도 및 근로지속가능성, 종사상지위, 월평균소득 등의 제반 특성들이 상대적으로 취약한 것으로 나타났다. 둘째, 원직장복귀자의 일자리만족도에는 성별, 학력수준, 기술적합도, 월평균 소득, 복리후생 혜택, 가족수입 여가생활 주거환경 사회적 친분관계 만족도, 요양 중 사업주와의 관계여부가 영향을 미치는 것으로 나타났다. 셋째, 타직장 복귀자의 경우, 성별, 종사상 지위, 기술적합도, 지속근무여부, 월평균급여, 복리후생혜택, 가족수입/여가생활/사회적 친분관계만족도, 요양 중 담당업무 주체, 요양 중 사업주와의 관계여부가 일자리 만족도에 영향을 미치는 것으로 나타났다. 이러한 연구결과를 바탕으로 산재근로자의 일자리만족도 제고를 위한 정책 및 실천적 방안을 제언하였다.

• 한국전기전자재료학회논문지
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• 제29권8호
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• pp.489-493
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• 2016

In this study, the effect of vanadium oxide ($V_2O_5$) content and pre-sintering atmosphere on sealing property of glass frit that consisted of $V_2O_5-BaO-ZnO-P_2O_5-TeO_2-CuO-Fe_2O_3-SeO_2$ was investigated by XPS (X-ray photoelectron spectroscopy). The content of V2O5 was changed to 15, 30, and 45 mol%, and the pre-sintering was carried out in air and $N_2$ condition, respectively. XPS analysis conducted before and after laser irradiation with identical sample. Before laser treatment, glass frits that were pre-sintered at air condition showed both $V^{4+}$ and $V^{5+}$, but the valence state was changed to $V^{5+}$ after laser irradiation when the glass frits contained 30 and 45 mol% $V_2O_5$; this change led to non-adhesive property. On the other hand, glass frits that were pre-sintered at $N_2$ condition exhibited only $V^{4+}$ and it showed fine adhesion irrespective of the $V_2O_5$ content. As a result, the existence of $V^{4+}$ seems to be a major factor for controlling the adhesive property of glass frit for laser sealing.

• 대한치과교정학회지
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• 제30권3호
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• pp.335-342
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• 2000

본 연구의 목적은 chlorhexidine varnish를 고정식 교정장치 장착 환자의 치면에 도포한 후 나타나는 치태내 균주의 변화 양상을 장기간 관찰하는 것이다. 서울대학교병원 치과진료부 교정과에서 고정치 교정장치로 치료하기로 하였던 환자 100명중에서 32주까지 장기간 추적 (follow-up) 되었던 21명을 최종 연구대상으로 선정하였다. 실험군 (12명) 은 chlorhexidine varnish를 1주일 간격으로 4회 도포한 후 고정식 교정장치를 부착하였고, 대조군 (9명) chlorhexidine varnish 처치를 하지 않고 고정식 교정장치를 부착하였다. 그리고 실험군에서는 20주 째에 chlorhexidine varnish를 1회 처치하였다. 두 군에서 고정식 교정장치 부착 직전과 부착 후 4, 8, 20, 32주의 치태내 균주의 변화 양상을 간접면역 형광 현미경법으로 분석하고 SAS 통계프로그램을 사용하여 다음과 같은 결과를 얻었다. 1. Streptococcus mutans는 실험군에서 전 실험기간동안 통계학적으로 유의성 있게 억제되 었고 (p<0.01), 대조군에서 전 실험기간동안 통계학적으로 유의성 있게 증가하였다 (p<0.05). 2. Streptococcus sanguis, Streptococcus mitis, Actinomyces viscosus, Actinomyces naeslundii는 실험군과 대조군에서 통계학적으로 유의성 있는 변화를 보이지 않았다. 따라서 고정식 교정장치를 사용할 환자에서 chlorhexidine varnish를 처치할 경우 치아 우식의 주 원인균인 Streptococcus mutant를 장기간 선택적으로 억제할 수 있을 것으로 생각된다.

• 패션비즈니스
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• 제15권5호
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• pp.43-54
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• 2011

Digital Textile Printing(DTP) is appropriate for quick response system(QRS) and is closely connected with high value added fashion industry. Fashion products of high price are mainly silk and cotton. For high quality DTP products, it is important to optimize the parameters of media, pre and after-treatment, ink, printer, etc. DTP for these two fiber materials is also accompanied certainly with steaming as after-treatment process for coloration. Role of steam is like water in exhaustion dyeing. Steam can diffuse dye or ink in printing paste to fiber. Quality of DTP products depend on after-treatment processes such as steaming, washing, drying. Current production amount of DTP is smaller than one of conventional textile printing. However conventional after-treatment system has been using so far. This is mismatched with DTP in terms of process efficiency, spot work of small lot, quality control. In this study, continuous after-treatment system has been suitably designed for DTP that washing and drying are available after steaming. So, It is possible to improve efficiency of DTP process. Especially, the effects of after-treatment process, such as temperature of heat drum, steaming time on printability, color difference, color fastness were examined. Two types of samples(cotton knit and silk fabrics) were used. The results were obtained as follows : First, there is no a wide difference between the K/S values of cotton and silk treated with continuous after-treatment system and those of sample treated with conventional printing after-treatment method. So it is more effective to use the continuous after-treatment system than conventional printing after-treatment system in case of the daily throughput of 1,000 yards below. Second, after continuous after-treatment for DTP, K/S values were increased and lightness($L^*$) values were decreased. ${\Delta}E$ values were below 2.3. Third, DTP samples treated with continuous after-treatment system were tested for fastness(washing, light, rubbing). Grades of fastness(washing, light, rubbing) were above 3 grade.

• 한국식품위생안전성학회지
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• 제38권3호
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• pp.123-130
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• 2023

본 연구에서는 수산물 시료 중 Salmonella spp. 검출을 위해 단시간의 전배양(2시간 이내)과 탈염과정을 포함한 DNA 추출법을 사용하여 분자생물학적 검출을 위한 수산물 전처리 방법에 대해 연구하였다. 배양 시간에 따른 증균 효율을 탐색하기 위해 10⁰, 10¹ 및 10² CFU/mL농도의 Salmonella spp. 5종을 NB 0.5에 접종하여 증균 전, 1시간 및 2시간 동안의 증균 효율을 비교하였다. 그 결과, 2시간 동안 모든 농도에서 약 1 log CFU/mL가 증균되어 초기 농도와 유의적인 차이가 나타났다. 또한 지역별 패류시료에 S. Typhimurium을 인위적으로 감염시킨 뒤 DNA를 추출하여 염농도를 측정한 결과, 모든 시료의 염농도가 0%로 DNA 추출과 동시에 탈염이 이루어진 것을 확인하였다. 이후 추출한 DNA를 사용하여 PCR을 수행한 결과 모든 시료에서 S. Typhimurium의 특이적 양성밴드가 확인되었다. 다음으로 수산물 시료 중 Salmonella spp. 검출을 위한 증균 과정과 탈염을 포함한 DNA 추출방법의 검증을 위해 멸균 홍합시료 및 비멸균 홍합시료에 Salmonella spp. 5종을 인공적으로 약 10⁰, 10¹, 10² CFU/g의 농도로 오염시켜 전배양과 DNA를 추출하여 PCR로 특이적 증폭 밴드의 여부를 확인한 결과, 모든 농도의 Salmonella spp. 5종에서 특이적 밴드가 확인되었다. 결과적으로 본 연구에서 제시한 전배양 및 DNA 추출방법을 포함한 전처리 방법과 PCR을 사용하여 수산물 시료에서 10 CFU/g 미만의 Salmonella spp.를 검출하였으며, 시간과 비용면에서 효율적이며 과정이 복잡하기 않기 때문에 수산물의 처리 현장에 활용될 수 있을 것으로 기대된다.

• 대한치과교정학회지
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• 제13권2호
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• pp.177-183
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• 1983

The soft tissue covering of the face plays an important role in facial esthetics, speech and other physiologic functions. Thus, it is recognised by all clinical orthodontists that success of orthodontic treatment is closely related to the changes in soft tissues of the face. The purpose of this study was to evaluate the changes of bony and soft tissues in prepost treatment of Angle's Class III malocclusion. The sample consisted of 18 males and 37 females, pretreatment age of 9 years to 11 years. For this study 11 landmarks were plotted, 14 linear length, 4 soft tissue thickness and 2 angles were measured. The obtained results were as follows; 1. In the linear measurements of bony and soft tissue changes, A, Is, Ss, Ls and Li were located more anteriorly in both sexes. However Si and B showed more remarkable anterior movement in female. 2. In the comparison of the changes of the soft tissue thickness, Ss and Li in male subjects and Ss in female subjects increased. 3. In the degree of correlation between changes in the soft tissue profile and changes in the skeletal profile, Is: Ls, Il: Li and B: Si in both sexes had significant correlations. However A:Ss had remarkable significant correlation in female. 4. There were significant correlations between change in ${\angle}A$ and change in ${\angle}B$ in all sexes. 5. There were little correlation between changes in distance difference of Is and Ii and Change in distance difference of Ls and Li in all sexes.

• 한국축산식품학회지
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• 제34권2호
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• pp.151-157
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• 2014

This study investigated the effects of three proteases (trypsin, pepsin and chymotrypsin) on the hydrolysis efficiency of porcine placenta and the molecular weight (Mw) distributions of the placental hydrolysates. Because placenta was made up of insoluble collagen, the placenta was gelatinized by applying thermal treatment at $90^{\circ}C$ for 1 h and used as the sample. The placental hydrolyzing activities of the enzymes at varying concentrations and incubation times were determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and gel permeation chromatography (GPC). Based on the SDS-PAGE, the best placental hydrolysis efficiency was observed in trypsin treatments where all peptide bands disappeared after 1 h of incubation as compared to 6 h of chymotrypsin. Pepsin hardly hydrolyzed the placenta as compared to the other two enzymes. The Mw distribution revealed that the trypsin produced placental peptides with Mw of 106 and 500 Da. Peptides produced by chymotrypsin exhibited broad ranges of Mw distribution (1-20 kDa), while the pepsin treatment showed Mw greater than 7 kDa. For comparisons of pre-treatments, the subcritical water processing (37.5 MPa and $200^{\circ}C$) of raw placenta improved the efficiency of tryptic digestions to a greater level than that of a preheating treatment ($90^{\circ}C$ for 1 h). Consequently, subcritical water processing followed by enzymatic digestions has the potential of an advanced collagen hydrolysis technique.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2019년도 추계학술대회
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• pp.85-85
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• 2019

Objective: In this study, the anti-stress effects of extract of Hydrangeae Dulcis Folium (EHDF) or ethalonic extract of Opuntiaficus-indica (EOF) of natural extracts from Jeju Island were investigated. Methods: We performed measurement of whole-body cortisol level and behavioral experiments including the novel tank test (NTT) or the open field test (OFT) to assess stress responses in zebrafish. To induce physical stress, we used the net handling stress (NHS). Fish were treated with EOF or EHDF for 6 min before they were exposed to stress. And then, we sacrificed fish for collecting body fluid from whole-body or conducted behavioural tests, including novel tank test and open field test, were evaluated to observe anxiety-like behaviours and locomotion. We used the cortisol enzyme-linked immunoassay kit to measure the amount of cortisol in each zebrafish sample. Results: The results indicate that increased anxiety-like behaviours in novel tank test and open field test under stress were prevented by treatment with both EOF and EHDF (P < 0.05). Moreover, compared with the unstressed group, which was not treated with NHS, the whole-body cortisol level was significantly increased by treatment with NHS. Compared with the NHS-treated stressed control group, pre-treatment with each EHDF and EOF for 6 min significantly prevented the NHS-increased whole-body cortisol level (P < 0.05). Conclusions: In conclusion these results suggest that both EOF and EHDF pretreatment may prevent stress responses and that its mechanism of action may be related to its positive effects on cortisol release.

• 대한치과교정학회지
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• 제37권6호
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• pp.421-431
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• 2007

상악 편악 소구치발치에 의한 교정치료는 임상적으로 상당히 많이 행해지고 있는 현실이지만 임상적 활용도에 비하여 그 보고는 희귀하다. 본 연구는 선택적 교정치료로 행해지는 상악 편악 소구치발치에 의한 교정치료 시 치료전후의 상, 하악 절치위치 및 입술위치 변화를 양악 소구치발치에 의한 교정치료의 치료 전후와 비교, 분석하여 편악발치에 의한 교정치료의 진단적 지침을 제시하고 치료 종료 후의 치료결과를 알아보고자 시행되었다. 최근에 교정치료가 종료된 환자 중에서 초진 시 수평피개량이 7 mm 이상을 보이는 증례 중 성공적으로 치료되었다고 판단되는 40증례를 선정하여, 교정치료의 목적으로 상악 제1소구치만을 발치하여 치료한 군(이하 편악발치군; Group 1, 20증례)과 상, 하악 제1소구치를 발치하여 치료한 군(이하 양악발치군; Group 2, 20증례)으로 나누어 치료 전후의 측모 두부방사선 사진을 채득하여 연구재료로 사용하였다. 연구결과 초진 시 편악발치군에서 양악발치군과 비교하여 하악 절치의 위치는 순측경사의 정도가 덜 하였으며 하순의 돌출도도 심하지 않았다. 치료종료 시 편악발치군에서 양악발치군과 비교하여 하악 절치의 위치를 제외한 모든 항목에서 두 군과의 차이는 관찰되지 않았다. 치료 전후의 변화량 비교에서 상, 하악 절치의 이동량은 양악발치군에서 많게 관찰되었으며 하악 절치의 견인에 따라 하순의 돌출도 감소의 양도 양악발치군에서 크게 관찰되었다. 상순의 위치는 두 군간의 차이가 관찰되지 않았다. 큰 수평피개를 갖는 증례에서 적절한 발치 선택을 위한 진단정보의 수집에 있어 상악 절치의 위치 및 상순의 돌출도는 충분한 정보를 제공하지 않았다. 하악 절치의 위치와 하순의 돌출량은 큰 수평피개를 갖는 증례에 있어서 편악발치 혹은 양악발치를 결정하기 위한 적절한 진단적 근거를 제시하였다. 큰 수평피개를 갖고 있는 환자 중 하악 절치의 순측경사가 심하지 않으며 하순의 돌출이 심하지 않은 안모를 갖고 있는 증례의 경우 편악발치에 의해 좋은 치료결과를 얻을 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제19권6호
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• pp.898-904
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• 2006

Effects of sodium bicarbonate (SBC) injection on meat quality and functionality of porcine M. longissimus lumborum were investigated. Fifteen pigs ($100{\pm}5kg$) were randomly selected at a commercial slaughter plant. After slaughtering the loins were dissected from the carcass before chilling at approximately 30 minutes post mortem. The loins were divided into four cuts for sample treatment, and SBC of 0.25 M, 0.40 M and 0.75 M was injected (2% w/w) using a syringe. As SBC injection level was increased, muscle pH increased significantly (p<0.05). SBC injection decreased lightness ($L^*$) values on the surface of muscle. Moreover, with injection of SBC, drip loss %, cooking loss % and shear force were significantly (p<0.05) decreased, whereas WHC and $Na^+$ content were significantly (p<0.05) increased. From panel testing of uncooked pork loin, no significant differences (p>0.05) were found in aroma, off-flavor and drip between injection of SBC at different levels and the control, although color and acceptability were significantly lower (p<0.05) in control pork loin compare with injection of SBC at 0.75 M. In cooked pork loin from the panel test, aroma, flavour, off-flavour and juiciness were found to be similar (p>0.05) on all treatments, but tenderness and acceptability were significantly higher (p<0.05) with injection of SBC at 0.75 M than for control loin. Myofibrillar protein solubility of muscles treated with SBC was significantly (p<0.05) higher than that of the control, although no significant differences (p>0.05) were found in sarcoplasmic protein solubility between the treatments. These results indicated that SBC injection into pre-rigor porcine M. longissimus lumborum could improve ultimate pork quality characteristics such as meat color, water-holding capacity, and could inhibit muscle protein denaturation due to an increase in muscle pH.