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¿ø¼Ò ¡í ºñ±Ý¼Ó¼º ¡í Ȳ Sulfur

Ȳ Sulfur : µð¸ÞÆ¿¼³ÆÄÀ̵å Dimethyl sulfide

Ȳ Sulfur
- ȲÇÔÀ¯ ¿µ¾ç¼ººÐ
- ¸ÞÄ¡¿À´Ñ methionine, È£¸ð½Ã½ºÅ×ÀÎ
- ½Ã½ºÅ×ÀÎ Cysteine --> Ÿ¿ì¸°

- DMSO, MSM, NAC, ½Ã½ºÆ¾

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±¸°­ ³» ¿øÀÎ Áß °¡Àå ÁÖµÈ °ÍÀº¡¸Ä¡ÁÖÁúȯ¡¹°ú¡¸¼³Å¡¹ÀÇ Á¸ÀçÀÌ´Ù. Ä¡ÁÖÁúȯÀÌ ÁøÇàÀÌ µÇ¸é ±¸°­ ³»¿¡´Â ±×¶÷ À½¼º Çø±â¼º ¼¼±ÕÀÇ ¼ö°¡ Áõ°¡Çϸç, ÀÌ ¼¼±ÕÀº Èֹ߼º Ȳ È­ÇÕ¹°(Volatile Sulfur Compounds; VSC)À» »ý¼ºÇϴµ¥, ÀÌ Èֹ߼º Ȳ È­ÇÕ¹°Àº ±¸ÃëÀÇ ÁÖµÈ ¿øÀÎ ÀÎÀÚ·Î ¾Ë·ÁÁ® ÀÖ´Ù. Èֹ߼º Ȳ È­ÇÕ¹°¿¡´Â Ȳȭ¼ö¼Ò(Hydrogen sulfide; H2S), ¸ÞÆ¿¸Öİź(Methyl mercaptan; CH3SH), µð¸ÞÆ¿¼³ÆÄÀ̵å(Dimethyl sulfide; CH3SCH3) µîÀÌ ÀÖÀ¸¸ç, ÀÌÁß È²È­¼ö¼Ò¿Í ¸ÞÆ¿¸ÖİźÀÌ ¾à 90% Á¤µµ Â÷ÁöÇÑ´Ù. ƯÈ÷, ÇâÀÌ °­ÇÑ À½½ÄÀ̳ª °í´Ü¹é, °íÁö¹æ À½½ÄÀ» ¼·ÃëÇÒ °æ¿ì¿¡´Â ÀÌ È­ÇÕ¹°¿¡ ÀÇÇØ À¯¹ßµÇ´Â ±¸Ãë°¡ ´õ½ÉÇØÁú ¼ö ÀÖ´Ù. ¶ÇÇÑ ÀÌ·¯ÇÑ Èֹ߼º Ȳ È­ÇÕ¹°Àº Ä¡ÁÖÁ¶Á÷¿¡ À¯ÇØÇÑ ÀÛ¿ëÀ» ÇÑ´Ù´Â ¿¬±¸ °á°úµµ ÀÖÀ¸¸ç, ÀÌ·Î ÀÎÇØ Æı«µÈ Ä¡ÁÖÁ¶Á÷Àº ´Ù½Ã ±¸Ã븦 À¯¹ßÇÏ´Â µî ±¸ÃëÀÇ ¾Ç¼øȯÀ» Áö¼Ó½Ãų À§ÇèÀÌ ÀÖ´Ù.
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Dimethyl sulfide (DMS) or methylthiomethane is an organosulfur compound with the formula (CH3)2S. Dimethyl sulfide is a flammable liquid that boils at 37 ¡ÆC (99 ¡ÆF) and has a characteristic disagreeable odor. It is a component of the smell produced from cooking of certain vegetables, notably maize, cabbage, beetroot, and seafoods. It is also an indication of bacterial contamination in malt production and brewing. It is a breakdown product of dimethylsulfoniopropionate (DMSP), and is also produced by the bacterial metabolism of methanethiol.

Natural occurrence
DMS originates primarily from DMSP, a major secondary metabolite in some marine algae.[2] DMS is the most abundant biological sulfur compound emitted to the atmosphere.[3][4] Emission occurs over the oceans by phytoplankton. DMS is also produced naturally by bacterial transformation of dimethyl sulfoxide (DMSO) waste that is disposed of into sewers, where it can cause environmental odor problems.[5]
DMS is oxidized in the marine atmosphere to various sulfur-containing compounds, such as sulfur dioxide, dimethyl sulfoxide (DMSO), dimethyl sulfone, methanesulfonic acid and sulfuric acid.[6] Among these compounds, sulfuric acid has the potential to create new aerosols which act as cloud condensation nuclei. Through this interaction with cloud formation, the massive production of atmospheric DMS over the oceans may have a significant impact on the Earth's climate.[7][8] The CLAW hypothesis suggests that in this manner DMS may play a role in planetary homeostasis.[9]
Marine phytoplankton also produce dimethyl sulfide,[10] and DMS is also produced by bacterial cleavage of extracellular DMSP.[11] DMS has been characterized as the "smell of the sea",[12] though it would be more accurate to say that DMS is a component of the smell of the sea, others being chemical derivatives of DMS, such as oxides, and yet others being algal pheromones such as dictyopterenes.[13]
Dimethyl sulfide also is an odorant emitted by kraft pulping mills, and it is a byproduct of Swern oxidation.
Dimethyl sulfide, dimethyl disulfide, and dimethyl trisulfide have been found among the volatiles given off by the fly-attracting plant known as dead-horse arum (Helicodiceros muscivorus). Those compounds are components of an odor like rotting meat, which attracts various pollinators that feed on carrion, such as many species of flies.[14]

Physiology of dimethyl sulfide
Dimethyl sulfide is normally present at very low levels in healthy people, namely <7nM in blood, <3 nM in urine and 0.13 – 0.65 nM on expired breath.[15][16]
At pathologically dangerous concentrations, this is known as dimethylsulfidemia. This condition is associated with blood borne halitosis and dimethylsulfiduria.[17][18][19]
In people with chronic liver disease (cirrhosis), high levels of dimethyl sulfide may be present the breath, leading to an unpleasant smell (fetor hepaticus).

Smell
Dimethyl sulfide has a characteristic smell commonly described as cabbage-like. It becomes highly disagreeable at even quite low concentrations. Some reports claim that DMS has a low olfactory threshold that varies from 0.02 to 0.1 ppm between different persons, but it has been suggested that the odor attributed to dimethyl sulfide may in fact be due to di- and polysulfides and thiol impurities, since the odor of dimethyl sulfide is much less disagreeable after it is freshly washed with saturated aqueous mercuric chloride.[20] Dimethyl sulfide is also available as a food additive to impart a savory flavor; in such use, its concentration is low. Beetroot,[21] asparagus,[22] cabbage, corn and seafoods produce dimethyl sulfide when cooked.

Dimethyl sulfide is also produced by marine planktonic micro-organisms such as the coccolithophores and so is one of the main components responsible for the characteristic odor of sea water aerosols, which make up a part of sea air. In the Victorian era, before DMS was discovered, the origin of sea air's 'bracing' aroma was attributed to ozone.[23]

 


 
 
 

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