• 대한화장품학회지
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• 제40권2호
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• pp.155-162
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• 2014

본 연구에서는 낙타유를 유효성분으로 하여 리포좀을 제조하였고, 이를 이용하여 항노화 효능을 갖는 화장품 원료를 개발하고자 다양한 실험을 실시하였다. 제조된 낙타유 리포좀은 피부 섬유아세포에서 collagen과 hyaluronan synthase-3 (HAS-3)의 발현을 증가시키고 matrix metalloproteinase (MMP)-1의 발현을 감소시킬 뿐 아니라 elastase의 활성을 억제하여 주름 개선 기능을 갖는 것을 확인하였다. 또한 자외선으로부터 손상된 세포를 재생시키는 효과를 확인하였다. 이에 따라 낙타유를 함유한 리포좀은 항노화 소재로 활용할 수 있을 것으로 사료된다.

• 펄프종이기술
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• 제43권2호
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• pp.49-56
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• 2011

Mulching technique is used to control the temperature and moisture content of soil by covering the ground surface. Most kinds of mulching film are made of polyethylene which is non-biodegradable synthetic polymer. Utilizing these films has been one of the main sources in soil pollution. Thus residual films under the ground should be removed after a certain period of time. Therefore, an alternative mulching material made of biodegradable functional paper is considered instead of non-biodegradable films. The mulching sheet produced from paper basis has a functionality to be naturally degraded and then recycled to the bio-materials on soil. In this study, the paper based-mulching sheet coated with biodegradable polymer was specially produced using a laboratory bar coater. Coating colors prepared by dissolving PBS/PLA in chloroform were applied to kraft paper. The mechanical strength and aging properties of this mulching sheet were investigated. The burst strength of polymer-coated paper was decreased with the increase of the PBS ratio in PBS/PLA blends, and, in particular, 30/70 blending condition led to good stability in heat-aging atmosphere for 60 days.

• Journal of Applied Biological Chemistry
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• 제63권3호
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• pp.203-209
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• 2020

This study focused on the preparation and characterization of anti-wrinkle peptides from the salted and fermented shrimp (Acetes japonicus) inoculated with Salinivibrio cibaria BAO-01 (SFSC). The results showed the proximate composition of SFSC to be 9.23% water, 75.32% protein, 0.23% fat, and 13.3 mg/g ash. Interestingly, the S. cibaria fermentation significantly increased the amount of methionine, leucine, and arginine. The in vitro antioxidant activity was assayed by the diphenylpicrylhydrazyl method and its IC₅₀ value was found to be 43.02±2.84 ㎍/mL. It was observed to inhibit the activity of elastase, tyrosinase, collagenase, and hyaluronidase. The IC₅₀ values of SFSC were 182.75±12.38 ㎍/mL for anti-elastase activity, 186.78±7.95 ㎍/mL for anti-tyrosinase activity, 444.4±34.81 ㎍/mL for anti-collagenase activity, and 1447.95±28.92 ㎍/mL for anti-hyaluronidase activity. These results suggest that salted and fermented shrimp has strong potential for the development of nutricosmetic products.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제16권3호
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• pp.57-68
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• 2010

The purpose of this study is to investigate the current characteristics of healthcare and welfare policies in Japan focused on the related policies in 2000's. In Japan, with the perspectives of entering the super-aged society by 2005 and the movement of all of the baby boom generation into the elderly generation by 2015, more rapid progress to the aging society is expected. From this situation, Japanese government has developed diverse elderly-oriented strategies such as "structural reform of social security", "nursing care system" and "gold plan 21" in 2000's. However, most of the related researches targeted the period to early 2000's, excluding the papers about the individual policies. Recently in our country, many related policies have been developed such as the enforcement of "long term care insurance system for the elderly" by 5 year period reevaluations and the preparation for 2nd step of "Plan for Ageing Society and Population"(2011~2015). At this moment, the investigation on the related policies of Japan could give appropriate references to us, a late starter of aging society.

• Bulletin of the Korean Chemical Society
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• 제21권8호
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• pp.769-773
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• 2000

The dependence of photoluminescence (PL) and photoluminescence itation (PLE) on preparation condi-tions and the aging of porous silicon carbide (PSC) have been investigatted. The fiber size of the material pre-pared under dark-current mode, labele d DCM, was larger than that of the photoassisted (PA)process.The intensity of the PL spectrum for the PA condition was higher than that of the DCM condition. The PA condition giving small fiber size exhibited amore prominent high-energy component but the emission bands of both con-ditionsobserved were rather similar. The origin of the PL may have played an importantrole in the surface defect center introduced by the reaction conditions ofHFatthe surface of the silicon carbide. Selective excita-tion of the PL bandsusingdifferent excitation wavelengths has been used to identify distinct componentswith-in the PL bandwidth. Two main PL bands with peak wavelength of494 and534 nm were clearly resolved. On the other hand, selectivc emission of the PLEbands using different emission wavelengths has been used to identify distinct components within the PLE bandwidth. The higher energy band with peak wavelength of 338 nm and the lower energy bands involving 390,451 and 500 nm were clearly resolved. According to the pro-ionged aging in air, PL spectra appearedasone band, This emission probably originated from states localized to the band-to-band recombination due to the oxidation on the crystallite surface.

• 상하수도학회지
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• 제36권3호
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• pp.177-186
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• 2022

In this study, newly improved Ferron assay test haved on timed spectrometry was used for the determination of hyolrolytic Al species presented in PACl coagulant. The color development reagent ferron was prepared by using conventional method and two newly developed methods. Then the ferron assay test was used to compare and analyze the distribution of Al(III) hydrolyzed species presented in the prepared PACl and alum. The preparing method of reagent A required an aging period of 7 days by adding a hydroxylamine hydroxide and a 1,10-phenanthroline monohydrate reagent, whereas the preparing method of reagent B was used as a coloring agent immediately without aging time. The regression analysis between UV absorbance and Al concentrations of conventional method and newly developed method of ferron reagents in low-concentration aluminum solutions and high-concentration aluminum solutions, showed the correlation coefficients of 0.999 or higher, as showing high correlations of conventional method and newly developed method. Applying Ferron assay test, Al species in the PACls and alum were classified as Ala(monomeric Al), Alb (polymeric Al), and Alc (colloidal and precipitated Al). Distribution of Al(III) hydrolyzed species according to the preparation of ferron colorimetric reagents was similar.

• Applied Biological Chemistry
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• 제29권2호
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• pp.227-236
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• 1986

찹쌀 및 가루를 사용하여 담금한 고추장(시험구 A:찹쌀가루, 시험구 B: 찹쌀, 시험구 C: 찹쌀 및 가루의 혼용)의 화학성분, 효소력 및 texture를 측정한 결과는 다음과 같다. 수분, 조단백, 조지방, 적정산도, 무기성분, alcohol의 함량 및 pH는 시험구간에 차이가 없었다. 아미노태 질소함량과산성 protease 및 당화 amylase 활성은 A구가 높았고 환원당은 B구가 경시적으로 높았다. Ca, Cu, K, Mn, Mg, P, Fe의 무기성분이 각 시험구에서 검출되었고 이중 K의 함량이 가장 높았으며 Cu, Mn, Fe은 극히 미량이었다. Aspartic acid, glutamic acid, cystine, agrginine, proline등의 유리아미노산이 60일 숙성 고추장에서 양적으로 많이 검출되었고 histidine, valine의 함량은 적었으며, 유리아미노산의 총량은 A구 16.49, B구 13.68, C구 15.84mg/g으로서 A구가 가장 많았고 B구의 고추장이 가장 적었다. Texture를 측정한 결과 견고성과 부착성은 담금 직후에는 A구가, 숙성 후기에는 B구가 높았으며 응집성, 탄력성은 A구가 높았고 B구가 낮았다.

• 한국조리학회지
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• 제12권4호
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• pp.225-235
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• 2006

소원콩(소립 황색콩)과 Bacillus subtilis KCCM 11315를 이용한 생청국장을 제조하기 위하여 생청국장 발효 및 후숙 기간별로 아미노태 질소, 암모니아태 질소, pH, 총산, 총당, 갈색도 및 생균수 등의 품질 특성을 조사하였다. $40^{\circ}C$에서 72시간 동안 발효하는 과정 중에 아미노태 질소와 암모니아태 질소는 발효시간에 비례하여 크게 증가하였고, pH는 발효가 진행될수록 알칼리화하였으며, 총산과 총당은 발효시간이 경과함에 따라 점차 감소하였다. 갈색도를 조사한 결과 발효가 진행될수록 많은 수용성 갈변물질이 생성되었고, 생균수는 발효 36시간에 최대 균수를 나타낸 후 하락하였다. 발효 완료후 $4^{\circ}C$에서 48시간 동안 후숙시키는 과정에서 암모니아태 질소의 감소가 뚜렷하였으며, 갈변물질과 생균수는 약간 감소하는 경향이었다. 아미노태 질소, pH, 총산 및 총당의 변화는 크지 않았다. 생청국장의 맛과 색을 좌우하는 아미노태질소의 함량과 갈변물질의 생성, 불쾌치의 원인물질이 되는 암모니아태 질소의 함량, 그리고 발효균의 생균수 등을 고려하였을 때 생청국장의 제조를 위해서는 소원콩에 Bacillus subtilis 균주를 접종한 후 $40^{\circ}C$에서 36시간 발효시킨 다음 $4^{\circ}C$에서 48시간 정도 후숙시키는 것이 가장 적합한 것으로 나타났다.

• 가족자원경영과 정책
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• 제16권1호
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• pp.123-148
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• 2012

The main objective of this study was to investigate how people prepare for old age by looking at financial statements from single-person households in Gyeonggi province; the policy implications regarding low fertility and population aging are considered. The subjects were members of 600 households who were aged 26 to 44 years old and not married. The data were analyzed by t-test, ANOVA, and dichotomous logistic regression using SPSS WIN 12.0. Respondents pointed out that financial problems are the greatest challenges for those facing old age in single-person households; they said that a stable job is the most important factor for secure living. About 57% of household residents responded that they have prepared for retirement, and a majority of them said they hoped to spend their elderly years with a marriage partner. The financial statements from single-person households were inferior to those from other types of households. The assets of single-person household members were less than those of other households. Only 10.5% of respondents have owned homes. The study discusses policy implications for those who want marriage and for those who don't want it. For those who want marriage, job-seeking support was proposed, and for the others, tax deductions and family programs for single-person households were proposed.

• 한국응용과학기술학회지
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• 제16권2호
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• pp.163-170
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• 1999

Spherical alumina powders were prepared by the controlled hydrolysis of aluminum iso-propoxide in a solution consisting of n-octyl alcohol and acetonitrile. As aluminum alkoxide's concentration increased, the particle size was increased and size distribution was more broad. As-prepared particle morphology was not spherical when acetonitrile volume fraction was increased over than 60%. As-prepared amorphous powders crystallized to ${\gamma}$-alumina at $1000^{\circ}C$ and converted to ${\alpha}$-alumina at $1150^{\circ}C$. The particle morphology was retain after crystallization ${\alpha}$-alumina. When aluminum iso-propoxide was used as aluminum source, the optimum preparation condition of spherical alumina was 0.1M AIP, 0.2M H2O, $0.1g/{\ell}$ HPC with a volume fraction (1/1) of the n-octyl alcohol/acetonitrile, 10min of reaction time and 30min of aging time.