• The Korean Journal of Food And Nutrition
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• v.13 no.6
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• pp.558-562
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• 2000

A strain of non-sulfur photosynthetic bacteria possessing large amount of ubiquinone-10 in the cell mass, was isolated from waste water collected from the Nakdong River. It was identified as Rhodobacter sp. N-2 by a series of studies on its morphological. cultural and physiological characteristics. The organism appeared to got higher cell mass under circumstances of anaerobic growth conditions than under photosynthetic aerobic cultures. Biotin and thiamin and niacin could be used as good growth factors.

• Korean Journal of Food Science and Technology
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• v.22 no.5
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• pp.555-561
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• 1990

Aromas of sulfur-containing volatiles from two vegetable varieties of Cruciferae Brassica oleracea and the suppression of undesirable sulfurous aromas of cruciferous vegetables by sulfhydryl oxidase of caraway seeds were examined. Aroma components were separated by gas chromatography equipped with a dual flame photometric detector The volatile sulfides produced from cabbage and broccoli varied. in the relative quantities and rates of production. according to the amount of caraway seeds added and incubation time. The amount of methanethiol and dimethyl disulfide in the cabbage and broccoli with caraway seeds was far less than those in the cabbage and broccoli. Removal of methanethiol and dimethyl disulfide was proportional to the amount of caraway seeds added, and was remarkable with 2.5% aqueous slurries of caraway seeds added.

• Korean Journal of Plant Resources
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• v.11 no.1
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• pp.51-59
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• 1998

When the contents of the constituents such as total amino acids, free amino acids, volatile organosulfuric compounds and steroidal saponins among three origins in the aerial-and underground parts of Allium victorialis, it was suggested that the characteristic components regarding to quality evaluation could be differed according to the purpose of utilization. For the utilization of amino acids, underground parts of this plant was shown to be better than aerial part. In addition, Ulung island origin was found to contain the highest amino acids content among the three origins though the difference was small. The amino acids showing remarkably high contents were appeared to be arginine, glutamine and asparagine. In the volatile organosulfuric compounds, the origina of Mt. Odae and Mt. Chiri positioned in inland showed higher contents than Ulung island origin geographically positioned in the ocean. Inland origins were shown to contain higher organosulfurie component contents in aerial parts than in underground parts while those of Ulung island origin were higher in underground parts than aerial parts. Underground parts, regarding to saponin constituents, showed higher contents than aerial parts. Underground parts of Ulung island origin were shown to contain more saponins than those of other two origins and the sequence of the contents was in the order of Ulung island>Mt. Chiri>Mt Odac.

• Journal of the korean Society of Automotive Engineers
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• v.15 no.3
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• pp.19-31
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• 1993

디젤자동차는 가솔린 자동차에 비하여 연료소비효율(fuel economy)이 20-30% 정도 높고 고출력을 낼수 있어 이의 수요가 증가하고 있다. 본 고에서는 디젤자동차에서 배출되는 수많은 화학물질중에서 문제가 되고 있는 입자상물질, NOx 및 SO$_{2}$를 제거하는 기술에 대하여 살펴본다. 이러한 오염물질의 저감을 위하여는 배기가스 재순환, 분사시기의 조절, 인터쿨링 같은 연소기술의 개선과 유황분이 적고, 방향족화합물의 함량이 적은 청정연료를 사용하여 어느 수준까지는 목적을 달성할 수 있다. 1. 디젤자동차 배출허용기준. 2. 배기가스 정화기술. 2.1 트랩기술(trap technology). 2.2 재생기술(regeneration technology). 2.3 제어 및 센서기술(control and sensor technology)

• Microbiology and Biotechnology Letters
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• v.25 no.4
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• pp.354-358
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• 1997

Some sulfur coompounds dissimilation characteristcs of Thermococcus sp. DT1331 were studied. DT1331 had ether-like lipid compounds in addition to esters in the cell membrane. The specific growth rates of DT1331 decreased with increasing head spaces of the cultures. However, when the ratio of head space volume to medium volume was 5.60, the strain showed no growth. DT1331 showed vigo- rous growth with 1% or more elemental sulfur addition. Cystine could substitute elemental sulfur and DT1331 showed moderate growth with 0.1% or more cystine concentration. The specific growth rate and maximum cell concentration of Thermococcus sp. DT1331 in the presence of elemental sulfur were 0.80 hr$^{-1}$ and 2.0 x 10$^{8}$ cells/ml, respectively, while they were 0.67 hr$^{-1}$ and 1.1 x 10$^{8}$ cells/ml, respectively in the presence of cystine.

• Journal of Food Hygiene and Safety
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• v.26 no.3
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• pp.254-259
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• 2011

Growing evidence indicates that oxidized low density lipoprotein (LDL) may promote atherogenesis. Therefore, inhibition of LDL oxidation may impede this process. The inhibitory effected on the susceptibility of human LDL to $Cu^{2+}$ or macrophages induced oxidation was investigated by monitoring thiobarbituric acid reactive substances(TBARS). Organosulfur compounds of garlic oil contains diallyldisulfide, diallyltrisulfide, diallyltetrasulfide, and diallyl pentasulfide in order. Garlic oil inhibited LDL oxidation by $Cu^{2+}$, or macrophages in a dose dependently, with a 20~60 ${\mu}g$, as increased TBARS assay. Garlic oil, at 60 ${\mu}M$, almost completely inhibited macrophages induced increase in electrophoretic mobility of LDL. When compared with several other antioxidants, probucol showed highest ability, and then garlic oil showed a much higher ability than natural occurring antioxidants, ${\alpha}$-tocopherol and ascorbic acid. The results suggested that garlic oil might play the inhibitory effects in the process of LDL oxidation.

• Journal of Life Science
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• v.22 no.12
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• pp.1712-1717
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• 2012

Oxidation of low density lipoprotein (LDL) plays an important role in the development and progression of atherosclerotic disease. In this study, human LDL was isolated and oxidized using $CuSO_4$ in the presence or absence of S-allylmercaptocysteine. Oxidative modification of the LDL fraction was monitored by both the appearance of thiobarbituric acid substances (TBARS), an increase in electrophoretic mobility, and conjugated diene formation. The addition of S-allylmercaptocysteine reduced lipid peroxide formation, indicating it to be an effective antioxidant. The inhibition of LDL oxidation by $5{\sim}20{\mu}g/ml$ S-allylmercaptocysteine occurred in a dose-dependent manner, as assessed by the TBARS assay. S-allylmercaptocysteine at $20{\mu}g/ml$ almost completely inhibited the $Cu^{2+}$ induced increases in electrophoretic mobility of LDL and almost completely inhibited conjugated diene formation. A more potent antioxidative activity was observed for S-allylmercaptocysteine than for either Vitamin C or $d{\ell}-{\alpha}$-tocopherol. Thus, S-allylmercaptocysteine aid in preventing the development and progression of atherosclerotic disease.

• Journal of the Korean Wood Science and Technology
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• v.12 no.3
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• pp.3-8
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• 1984

It is shown that Paul and Jones' Rule of Mixtures modified by Smith and Cox's theory can be used for the fiber-reinforced, sulfur-based composites, when the constant for the linear regression equation is given. The computation results, programmed by Hewlett Packard 75C (HP 75C) using math rom pack for the linear regression form, expressed as $E_c=\frac{1}{3}aE_fV_f+bE_mV_m$, turn out to be a=3.27-3.54 b=-2.47~-2.80. This results indicate that the factors such as density of fiber mat and the amount of matrix used have nothing for affecting the numerical value of the constants a and b of the linear regression form. Conclusively this results also show that the Paul and Jones' Rule of Mixtures which has been used for the composites made by randomly-oriented long fiber can also be used for the composites made by short fiber with the same fiber orientation such as wood and lignocellulosic fibers.

• Korean Journal of Food Science and Technology
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• v.5 no.1
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• pp.55-64
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• 1973

Garlic and traditional fovarite foodstuffs of plant origin have been analyed for selenium and sulfur containing amino acid content selenium compound were assayed using a $^{77m}Se$ neutron activation analysis, cystine and methionine determination by paper and thin-layer chromatography. The results obtained indicate that the content of selenium and sulfur containing amino acid are highest in garlic. The results also show that the selenium is a more abundant in particular speies such as garlics produced in Tan Yang and Wei Sung. The effect of Korean garlic and favorite typically found in the Korean diet has also been studied. Some vegetables known to contain a relatively high level of sulfur and selenium (garlic and onion) do loss significent quantities of selenium as a result of cooking.

• Journal of Environmental Health Sciences
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• v.40 no.6
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• pp.477-483
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• 2014

Objectives: This study was carried out to investigate the characteristics of odors emitted from sewage in a sanitary sewer and its outlets. Methods: The concentration of mal-odorous sulfur was analyzed by gas chromatograph, and odor intensity was estimated by an on-site sensory test. Odor intensity calculated from instrumental analysis results was compared with odor intensity observed at field. Results: As a results, the concentration of $H_2S$ ranged from 2.4 ppb to 5,889 ppb (average 703 ppb), while $CH_3SH$, $(CH_3)_2S$, and $(CH_3)_2S_2$ showed from 10 ppb to 554 ppb (average 119 ppb) and from 20 ppb to 332 ppb (average 70 ppb) and from 2.7 ppb to 8.1 ppb (average 5 ppb) individually. Average odor intensity observed in the field was degree three. Odor intensity calculated from sulfur compound concentration was confirmed as similar to the observed odor intensity because the coefficient of variance between the observed and the calculated intensities was less than one. Conclusion: It was expected that the results of this study will be helpful to design a deodorizing device to reduce odor emissions from sewerage facilities in the future.