• 분석과학
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• 제9권4호
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• pp.399-405
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• 1996

참기름 중의 향기성분을 연속수증기증류법(SDE)과 동적헤드스페이스법(DHS)으로 포집하여 GC와 GC-MSD로 동정하였다. SDE로 분석하였을 때 alcohol 6종, aldehyde 6종, ketone 및 acid류 5종, furan 및 phenol류 4종, pyrazine 화합물 12종, pyridine 및 thiazole류 4종, 기타 9종으로 총 46종이 확인되었다. DHS로 분석한 경우 alcohol 3종, aldehyde 6종, ketone, furan 및 phenol류 6종, pyrazine류 12종, pyridine 및 thiazole 4종, 기타 5종으로 모두 36종이 확인되었다. 대부분의 화합물이 SDE법에서 분리된 것이었으나 1-hexanol, pentanal, dimethylsulfide등은 DHS법에 의해서만 분리되었다.

• 한국직업건강간호학회지
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• 제15권2호
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• pp.144-152
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• 2006

Purpose: This study was conducted to understand the effects of daily hassle stress on the psycho-social health of male workers in manufacturing industry. Methods: Daily hassle stress and psycho-social health in manufacturing industry workers were estimated by using the Daily Hassles Scale for Korea Workers (DHS-KW) and general health questionnaire (GHQ), respectively. Results: The subjects were 553 male workers who had never been occupationally exposed to hazardous chemicals, were mean age 39.6 years and mean work duration was 15.66 years. DHS-KW total mean score had significantly higher in young ages (twenties and thirties ages), office workers, managers and daytime workers than other groups. GHQ total mean scores were significantly higher in un-married, daytime and overtime workers than others. DHS-KW and GHQ score correlated that they were negative correlation with age and working years, but was positive correlation with working hours and overtime work. The significant correlation between DHS-KW and GHQ were observed almost variables of DHS-KW and GHQ except a domestic and daily problem in DHS-KW variables. Domestic and daily problems were only significantly correlated with anxiety and insomnia of GHQ variables. Conclusion: This study indicated that physical health was associated with work condition and psychsocial health was mainly associated with domestic and daily problems of DHS-KW variables. Thus, the study on Daily Hassles stress and related with work stress should be further investigated for the comprehensive health program including stress management and coping behavior.

• Bulletin of the Korean Chemical Society
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• 제30권9호
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• pp.1973-1977
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• 2009

In the present study, at first, 2,4-Dihydroxy Salophen (2,4-DHS), has been synthesized by combination of 1, 2-diaminobenzene and 2,4-dihydroxybenzaldehyde in a solvent system. This ligand containing meta-quinone functional groups were characterized using UV-Vis and IR spectroscopies. Subsequently, the interaction between native calf thymus deoxyribonucleic acid (ct-DNA) and 2,4-DHS, was investigated in 10 mM Tris/HCl buffer solution, pH 7.2, using UV-visible absorption and fluorescence spectroscopies, thermal denaturation technique and viscosity measurements. From spectrophotometric titration experiments, the binding constant of 2,4-DHS with ct-DNA was found to be (1.1 ${\pm}\;0.2)\;{\times}\;10^4\;M^{-1}.$ The fluorescence study represents the quenching effect of 2,4-DHS on bound ethidium bromide to DNA. The quenching process obeys linear Stern-Volmer equation in extended range of 2,4-DHS concentration. Thermal denaturation experiments represent the increasing of melting temperature of DNA (about 3.5 ${^{\circ}C}$) due to binding of 2,4-DHS. These results are consistent with a binding mode dominated by interactions with the groove of ct-DNA.

• 한국자원식물학회지
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• 제23권6호
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• pp.503-512
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• 2010

Anther derived double haploids (DHs) from sweet pepper genotypes ('Special', 'Derby', 'Bossanova', 'Fiesta', 'Debora' and 'Minipaprika') were used to study the agronomic variation in 2006. Ninety-nine successful DHs regenerants (32 from 'Special', 25 from 'Derby', 23 from 'Bossanova', 10 from 'Fiesta', 6 from 'Debora' and 3 from 'Minipaprika') were transplanted at plastic house and studied on their agronomic characters. Variation in agronomic characters was observed within the DHs of each genotype. DHs obtained from 'Derby' and 'Fiesta' exhibited wide variation in fruit yield $plant^{-1}$ whereas averaged fruit yield $plant^{-1}$ was highest in 'Derby' (1608 g) and less variation was observed in DHs of 'Bossanova'. Based on the agronomic characters expressed in DHs population at this environment, SP55, SP56, SP60, and SP116 from 'Special', SP8, SP10, SP14, SP16, and SP34 from 'Derby', SP115, SP119, SP142, SP143, SP196, and SP199 from 'Bossanova', SP41, SP45, and SP114 from 'Fiesta', SP21 from 'Debora' and SP91 from 'Minipaprika' identified as elite inbred lines and these DH lines could be used for commercial hybrids production in sweet pepper. Genetic relationship among the selected inbred lines using molecular markers and their response to diseases are further recommended to study.

• 치위생과학회지
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• 제18권6호
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• pp.340-348
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• 2018

본 연구는 치과위생사 의료인화에 대한 요구와 논의가 있는 현 시대적 상황에서 치과의료인력을 대상으로 치과위생사를 위한 선행과제와 의료인이 되었을 때의 긍정적 부정적 효과, 확장 가능한 전문업무에 대해 파악하고자 하였다. 치과위생사 259명, 치과의사 128명을 대상으로 치과위생사 의료인화에 대한 인식과 선행 과제, 긍정 및 부정적 효과와 확장 가능한 전문업무 등에 대해 조사 분석하여 다음과 같은 결론을 얻었다. 치과위생사 의료인화에 대해 치과위생사의 94.2%, 치과의사의 46.9%가 인지하였고, 치과위생사는 협회매체(52.5%), 치과의사는 치과신문(23.4%)을 통해 인지하는 경우가 많았다. 찬성도는 치과위생사의 95.0%, 치과의사의 64.1%였으며, 당위성은 치과위생사가 84.9%, 치과의사 51.6%였다. 당위성의 근거로 치과위생사는 업무 전문성과 교육과정 부합성이 높았고 업무 부합성이 낮았으나 치과의사는 의료체계 유사성이 높았고 교육과정 부합성이 가장 낮았다. 의료인화를 위한 선행 과제 중 직업적 영역에서 치과위생사와 치과의사 모두 직업의식과 윤리의식이 높았다. 제도적 영역에서도 두 직종 모두 치위생교육 질 관리가 가장 높았으며, 학제 일원화가 가장 낮았다. 사회적 영역에서 치과위생사는 중앙정부설득과 국민공감대 형성이 높았고, 치과의사는 유관단체 협력과 중앙정부 설득이 높았다. 치과위생사 의료인화 시 긍정적 효과는 치과위생사 인식 확장이 치과위생사와 치과의사 모두 가장 높았고, 부정적 효과는 치과위생사의 경우 임금상승 심화와 위임진료 증가가 높았고, 치과의사는 임금상승 심화와 구인난 심화가 높았다. 의료인화 시 확장 가능한 전문업무로는 독자적 치주관리프로그램 운영으로 치과위생사(79.9%)와 치과의사(69.6%) 모두에게 가장 높게 나타났다. 치과위생사는 치주관리를 위한 진단(44.4%)과 전신질환자 구강건강관리(44.0%), 비외과적 치주처치(41.3%), 근육 정맥주사(27.4%) 순이었고, 치과의사는 근육 정맥주사(44.1%), 비외과적 치주처치(34.3%), 전신질환자 구강건강관리(29.4%), 치주관리를 위한 진단(13.7%) 순이었다. 이상의 결과를 통해 치과위생사 의료인화가 가지는 의미에 대한 충분한 검토와 논의가 필요할 것으로 생각되고, 의료인화와 관련하여 치과위생사의 업무가 합리적으로 조정되고 합법화하는 데 본 연구가 활용되기를 기대한다.

• 설비공학논문집
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• 제27권5호
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• pp.247-253
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• 2015

The presented work demonstrates the effects of flow rate on the secondary side of DHS (District Heating System). Increasing flow rate at the secondary side of DHS decreases energy consumption and time to reach the set-point of the heated room while increasing heat flux on the floor in the heating space. When flow rate increases, the overall heat transfer rate of radiant floor also increases. However, the results also show overall heat transfer rateto not increased linearly and thus the existence of an optimal flow rate for the secondary side of DHS. Control of the radiant floor with hot water may be more effectively accomplished with a combined control strategy that includes heat flux and a temperature set-point. This experimental analysis has been performed using a lab-scaled DHS pilot plant located at Jeonju University in Korea.

• 한국치위생학회지
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• 제22권5호
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• pp.425-435
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• 2022

Objectives: This study aimed to examine the opinions of registered dental hygienists (RDH) and dental hygiene students (DHS), professionals who can practice visiting oral health care (VOHC), and the demand for specialized training courses of RDH for VOHC. Methods: Using a Google online survey, 125 RDH and 106 DHS personnel were surveyed on their perception of VOHC and the operation of special training courses. Results: RDH (97.6%) and DHS (96.1%) agreed that they needed VOHC for older people. Moreover, the qualification course for specialized training for VOHC was considered necessary. Regarding the appropriate curriculum, RDH preferred training programs comprising 2-hours classes over 6 months and 15 weeks and so on, and DHS preferred 3 hours classes over 6 months and 15 weeks and so on. Regarding the desired working type, the RDH preferred the half-day system, whereas the DHS preferred the alternate-day system. The Korean Dental Hygienists Association was intended for human resource development. They agreed that continuing education was necessary when working as a visiting RDH, and many responded that they would participate if a specialized training course was opened. Conclusions: RDH and DHS have a high level of awareness of the importance and necessity of VOHC, and consider a specialized training qualification course necessary for efficient VOHC.

• 한국식품영양학회지
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• 제19권2호
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• pp.161-168
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• 2006

식물체의 향기성분을 분리하는데 주로 사용되는 headspace(DHS, RPHS)법, SPME법, SDE법, SFE법과 최근에 개발된 PDE법으로 솔잎의 휘발성 성분을 추출하였다. 추출된 성분을 Ge/MS를 이용하여 총 65종의 휘발성 성분을 확인하였다. 확인된 성분은 terpene류 25종, alcoholfb류 16종, carbonyls류 9종, esters류 6종, acids류 7종, esters 화합물이 2종인 것으로 나타났다. Headspace(DHS, RPHS)법과 SPME 법에서는 휘발성이 강한 ethyl acetate, 2-ethyl furan, $\beta$-myrcene 등과 같은 저비점 휘발성 성분들이 많이 추출되었다. 반면에, 고비점 휘발성 성분들인 nerolidol, spathulenol, benzoic acid 등은 휘발 성분 추출시 열이 가해지는 SDE법, SFE법, PDE법 등에서는 확인되었으나 headspace법과 SPME법에서는 확인되지 않았다. 이들 6가지 추출방법에서 저비점 휘발성 성분 분석에는 headspace(DHS)법이 가장 좋은 것으로 나타났으며, 고비점 휘발성 성분 분석에는 SDE법이 가장 적합한 것으로 나타났다. 최근에 개발된 PDE법은 SDE법에 비해 추출효율 변에서 약간 떨어지나 전처리 방법이 간단하므로 짧은 시간에 많은 시료를 분석할 때 가장 적합한 방법인 것으로 판단된다.

• Journal of Acupuncture Research
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• 제23권2호
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• pp.73-90
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• 2006

Objectives : The effects of water extract of deer antler herbal-acupunture solution(DHS), prepared from the pilose antler of Cervus korea TEMMINCK var. mantchuricus Swinhoe (Nokyong), a traditional immunosuppressive and immune-activating Korean herbal- acupuncture, on collagen-induced arthritis(CIA:RA model) in mice was studied. Destruction of cartilage and bone are hallmarks of human rheumatoid arthritis, and controlling these erosive processes is the most challenging objective in the treatment of RA. Methods : We investigated the tissue protective effects of deer antler treatment using established murine collagen-induced arthritis(CIA) as a model. Potential synergy of low dosages of anti-inflammatory glucocorticosteroids and deer antler was also evaluated. Results : Treatment of established murine CIA with deer antler herbal-acupunture solution(DHS) $(10-50{\mu}g/day)$ suppressed disease activity and protected against cartilage and bone destruction. Although $10-50{\mu}g/day$ DHS had only a moderate effect on the inflammatory component of the disease activity, it strongly reduced cartilage pathology, as determined by histological examination. Serum cartilage oligomeric matrix protein(COMP) levels were significantly reduced, confirming decreased cartilage involvement. Histological analysis showed that bone destruction was prevented. DHS administration increased serum IL-1Ra levels and reduced anticollagen type II antibody levels. Treatment with low-dose $DHS(1{\mu}g/day)$ was ineffective in suppressing disease score, serum COMP or joint destruction. Synergistic suppression of both arthritis oseverity and COMP levels was noted when low-dose DHS was combined with prednisolone(0.05mg/kg/day), however, which in itself was not effective. Conclusion : DHS was shown to have the inhibiting effects against $IL-1{\alpha}-$ and $IL-1{\beta}-stimulated$ bone resorption. These results indicated that the DAS is not only highly stable and applicable to clinical uses in bone resorption, but also it will be served as a potent anti-inflammatory and anti-arthritic agents for treatment of human RA.

• Journal of Korean Neurosurgical Society
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• 제54권1호
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• pp.34-37
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• 2013

Objective : The purposes of this study were to evaluate the prevalence, types, and locations of Modic changes (MCs) in the thoracic spine in a large number of subjects, and to investigate the relation between the distributions of MCs and disc herniations (DHs) in the thoracic spine. Methods : Two experienced musculoskeletal radiologists assessed the presence of MCs and DHs by consensus in the thoracic MRIs of 144 patients with non-specific back pain. Patient ages ranged from 22 to 88 years (mean=$53.3{\pm}14.66$ years), and 72 were female (50%). The prevalence, distribution, relation of MCs and DHs was recorded. Results : MC was observed in 8 of the 144 patients (5.6%) and 10 of 1728 segments (0.58%). The most common MC was type II. Of the 8 patients exhibiting MC, 6 had type II (75.0%), and 2 had mixed MCs (type I/II or type II/III). MCs were distributed mainly at the mid-thoracic level (from T5/6 to T9/10). DH was detected in 18 patients (12.5%), 36 of 1728 segments (2.1%). Of the 10 segments exhibiting MC, 5 had DHs at the same level (50.0%). Accordingly, DH was strongly associated with MC (p=0.000). Conclusion : A low prevalence of MC was observed in the thoracic spine, and type II MC predominated. The low prevalence of MC in the thoracic spine suggests that it was caused by a relative lack of mobility as compared with the cervical and lumbar spines. And DHs were found to be strongly associated with MCs even in the thoracic spine.