• 생약학회지
• /
• 제3권4호
• /
• pp.199-204
• /
• 1972

A new physico-chemical method for identifying botanical drugs was investigated. Fifty drugs were chosen from the presently exported botanical drugs and were classified into 12 groups chemotaxonomically. Various extract(either, 50% ethanol and water) of each group were developed with same solvent system by using chromatographic method(TLC) and observed a characteristic pattern of each drugs. This method, therefore, can be applicable to identify each botanical drug out of the combined phyto-preparations.

• 한국식품조리과학회지
• /
• 제6권2호
• /
• pp.67-76
• /
• 1990

To observe the propability as the frying oil and oxidative stability of red pepper seed oil, some physico-chemical tests of the oil were examined during 21 days storage period at 5$^{\circ}C$, 15$^{\circ}C$ and 30$^{\circ}C$, and AOM value determined and after heating the oil at 180${\pm}$5$^{\circ}C$ for 40 hours with or without antioxidants. The analysis storage stability of red pepper seed oil showed that the quality of storage group at 5$^{\circ}C$ was almost as good as fresh oil, and the storage group at 30$^{\circ}C$ showed certain degree of rancidity. Change of physico-chemical characteristic during storage were so small so that storage stability of red pepper seed oil was found to be good. AOM stability of red pepper seed oil was 7 hours which is lower than other vegetable oil, but the degree of stability grew greatly after adding phenolic antioxidants, such on TBHQ or PG. As for the chemical change after heating continuously for 40 hours, acid value, peroxide value and refractive index increased, but iodine value decreased as the heating processed. The fatty acid composition also showed the remarkable reduction of linoleic acid. The addition of antioxidants resulted in the delay of oxidation, the degree of which was greater in TBHQ than in PG.

• 유기물자원화
• /
• 제12권4호
• /
• pp.112-120
• /
• 2004

본 연구에서는 강원 영서지역의 도시쓰레기와 슬러지의 물리 화학적 특성을 조사 연구 하였다. 도시 쓰레와 슬러지는 각각 6곳,2곳에서 샘플을 수거 분석하였다. 이 지역에서 2000년도에는 하루 197.4 톤의 폐기물이 발생하였다. 폐기물의 성분은 음식물 26.6%, 종이류 24.2%, 플라스틱 비닐류 22.8%, 섬유류 9.6%, 목재류 3.8%, 고무류 2.8% 등으로 이루어져 있다. 도시쓰레기의 3성분은 수분 40.2%, 가연분 52.1%, 불연분 7.7% 이며 슬러지 3성분은 수분 83.3%, 가연분 7.7%, 불연분 9% 이다. 화학 조성은 탄소류 51.6%, 산소 38.6%, 수소 7%로 이루어져 있다. 도시 쓰레기의 고위 발열량은 4989.4 kcal/kg 이며 슬러지의 발열량은 4428.04 kcal/kg 이다. 용출 실험에서 중금속 성분은 거의 발견되지 않았다.

• 한국환경보건학회지
• /
• 제31권1호
• /
• pp.86-93
• /
• 2005

Because generally large amount of sludges are generated from the process of sewage and wastewater treatment, the management and controlment of those sludge has become a important issue in many researches. In this dissertation, we conducted the research to see the physico-chemical characteristics of sludges generated from various sources. Moisture of sludges were 81.5% in textile industries, 81.4% in frame metal industries, 80.7% in 1st metal industries. Volatile solid were 22.1% in hide · rubber industries, 21.9% in coke · petroleum industries. Fixed solid were 18.5% and 17.7% in the 1st metal industries and frame metal industries. High heating value by wet base were 1,850 kcal/kg in coke · petroleum industries, 1,220 kcal/kg in hide · rubber industries, but sludges from the 1st metal industries and frame metal industries were impossible to incinerate because most of those sludges were inorganic. The leaching test showed that hazardous materials was detected in nearly every kinds of sludges. Some of sludges from hide · rubber industries and frame metal industries exceeded the leaching criteria and so they were classified as specific wastes. And other sludges generated in sewage treatment plants or other industries was below the leaching criteria.

• 패션비즈니스
• /
• 제12권6호
• /
• pp.23-33
• /
• 2008

The physico-chemical characteristics by bleaching treatments were assessed by several instrumental analyses such as surface morphology, chemical structural change, color change as well as tensile strength. The change of morphological characteristic was observed through scanning electron microscope(SEM). The observation of the fine structure on hair surface by SEM showed the bleached hair had much damaged to hair cuticle, and some of cuticle surface were worn away. To investigate the chemical structural changes in hair keratin, the cross-sections of hair samples were directly analysed using Fourier transform infrared microspectroscopy(FT-IRM). The results showed the cysteic acid S=O band intensity was distinctively increased by performing the bleaching treatment. The cleavage of cystine was appeared to proceed primarily through the sulfur-sulfur (-S-S-) fission whereby cysteic acid was formed as a principal oxidation products. The distribution of amide I band in hair keratin was determined by attenuated total reflectance(ATR) FT-IR mapping image. The results showed that the outer side of hair cortex was more damaged than the inner side of the hair cortex. Also, during chemical bleaching of the hair with alkaline peroxide, the hair was turned to reddish yellow due to the oxidative degradation of eumelanin. This means the eumelanin is more unstable than pheomelanin in chemical oxidation. With bleaching, the tensile strength was also reduced as a results of the chemical oxidation.

• 한국환경과학회지
• /
• 제9권5호
• /
• pp.429-436
• /
• 2000

In order to study on the variational characteristics of water quality and chlorolphyll a concentration the water samples were collected daily or three times a week during the period from April 1990 to November 1991 at Kukdong port located in the northern Kamak bay of Southern Korea I made an analysis on biological factor as chlorophyll a concentration as well as physico-chemical factors such as water temperature salinity sigma-t dissolved oxygen, nutrients (ammonia, nitrite, nitrate, phosphate, and silicate) N/P ratio and chemical oxygen demand. In Northern Kamak bay seasonal variations in physical factors such as water temperature salinity and sigma-t were very marked. On the other hand chemical factors such as nutrients concentration and COD were not so. Chemical factors, in particular silicate were influenced by input of freshwater. And the roles of silicate on the seasonal succession of phytoplankton species composition was very low. Phytoplankton biomass as measured by chlorophyll a concentration was very high all the year round and it was controlled by the combination of several factors especially of N/P ratio determined by dissolved inorganic nitrogen.

• 한국식품과학회지
• /
• 제21권2호
• /
• pp.283-288
• /
• 1989

저장온도가 축육소시지의 품질에 미지는 영향을 알아보기 위하여 저장온도별 이화학적, 미생물학적 변화를 비교, 검토하였던 바 다음과 같은 결과를 얻었다. 저장 온도별 VBN 함량의 변화는 온도의 영향에 민감한 반응을 나타내었는데 $10^{\circ}C$, $20^{\circ}C$에 비해 $40^{\circ}C$ 저장이 VBN 함량이 급격한 증가현상을 나타내었다. 또한, 변온저장 $(10/40^{\circ}C)$인 경우에는 $10^{\circ}C$와 $20^{\circ}C$에 비해 VBN 함량변화가 빠르나 $40^{\circ}C$에 비해서는 변화가 느린 경향이었다. 저장온도별 VBN 함량, 총균수의 변화는 저장기간의 경과와 저장온도 증가에 따라 증가하였으나, TBA 값은 저장기간이 경과함에 따라 그 변화 경향은 일정하지 않았지만, 전반적으로 $40^{\circ}C$가 $10^{\circ}C$, $20^{\circ}C$ 및 변온저장에 비해 높은 경향이었다. Aw와 수분함량은 저장온도별 큰 변화는 없었지만 저장온도가 증가함에 따라 약간 감소하는 경향이었으나 소시지 색깔은 저장기간이 경과함에 따라 어두워지는 경향이었다. 전반적인 slime형성의 기준인 관능평가 2.0을 기준으로 저장기간을 예측해 본 결과 $10^{\circ}C$는 40일 이상, $20^{\circ}C$는 40일 미만, $40^{\circ}C$는 30일 미만, 변온저장의 경우는 20일 정도로 산출되었다.

• 한국식품영양학회지
• /
• 제27권6호
• /
• pp.990-998
• /
• 2014

This study was performed to provide basic data for the sous-vide duck breast by comparing its water content, pH, color, number of microorganism, mechanical quality characteristic test, springiness, and sensory test with its control group which was cooked in traditional way. Sous-vide duck breast brightness, yellowness, and springiness. It l redness, hardness, and number of microorganism than its control group. There was no significant pH difference. Although sous-vide duck breast need longer cooking time, it was softer and had springiness. Overal-vide duck breast longer storage period and than traditionally cooked duck breast in sensory teste expected.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
• /
• pp.269-272
• /
• 2004

The use of colloidal gas aphron (CGA), as an external oxygen carrier, provides a promising alternative to promote aerobic bioremediation of BTEX in the subsurface environment. CGA is a stable bubble supported by three surfactant layers and can supply oxygen below the soil surface uniformly due to its plug-flow characteristic. Since CGA has a hydrophobic layer that can act as a partitioning medium for hydrophobic contaminants it is known to facilitate desorption of soil-sorbed contaminants. In addition, bioaugmentation and biostimulation are possibly achieved by using CGA when generated from a solution containing BTEX-degrading microorganisms and appropriate nutrients. In this study, we presented the physico-chemical characteristics of CGA generated from a solution composed of microorganisms and nutrients. The applicability of CGA as an in situ aerobic bioremediation technology of BTEX will be further evaluated.

• 약학회지
• /
• 제21권2호
• /
• pp.101-109
• /
• 1977

The effect of humidity on the aging process of hydrous aluminum oxide prepared by the reaction of aluminum chloride and sodium bicarbonate solution at pH 7.8, which was then kept in various atmosphere under relative humidity at 37.deg. was observed by the measurements of acid consuming capacity, X-ray diffraction and IR absorption. The humidity was one of the important factors influencing the aging process of hydrous aluminum oxide during storage. The higer the humidity, the more was accelerated age, crystalize and loss in acid reactivity. Depending on the humidity, the aging product was different, especially, in the case of up to the relative humidity of 72%, it forming bayerite. On the other hand, the hydrous aluminum oxide aged below the relative humidity of 50% was still amorphous even after 120 days storage. When hydrous aluminum oxide was aged under higher humidity, definite IR absorption bands develop as the hydroxys become part of an ordered structure, and it showed their characteristic absorption band around 1630 and 1060 cm$^{-1}$.