DMPT, NOMERO YA CAS: 4337-33-1. Ibyiza kurusha ibindiikintu gikurura amaziubu ngubu!

DMPTizwi nka dimethyl-β-propiothetin, iboneka cyane mu bimera byo mu nyanja n'ibimera binini bya halophytic. DMPT igira ingaruka nziza ku mikorere y'imirire y'inyamaswa zo mu mazi, inkoko, n'inyamaswa zo mu mazi (amafi n'isambaza). DMPT ni ikintu gifite ingaruka zikomeye ku nyamaswa zo mu mazi mu bintu byose bizwi birimo (CH) na S-groups.

1. Inkomoko ya DMPT

Dimethyl sulfide (DMS) ikorwa na Polysipho - nia fastigata ahanini ikomoka kuriDMPT, ikaba kandi itanga methyl nziza mu bimera by’ibimera, kandi igikoresho cy’ingenzi gigenzura osmotic ya algae n’ikimera cy’ibimera byo mu mazi cyitwa Spartina angelica nacyo ni DMPT. Ingano ya DMPT iratandukanye bitewe n’ubwoko butandukanye bw’ibimera byo mu mazi, kandi ingano y’ibimera byo mu mazi bimwe na bimwe iratandukana mu bihe bitandukanye. DMPT ishobora kwihutisha cyane kugaburira no gukura kw’amafi atandukanye yo mu mazi meza. Ingaruka zo kugaburira za DMPT zitandukanye n’ibindi bintu nka aside L-amino cyangwa nucleotides, kandi igira ingaruka ku kugaburira no gukura ku nyamaswa hafi ya zose zo mu mazi.

2.1 Ligande nziza nk'ibikoresho byo kwakira uburyohe

Ubushakashatsi ku byuma bifasha kumva amafi bishobora gukorana n’amatsinda ya (CH) S buracyari ubusa. Ukurikije ibyavuye mu bushakashatsi ku myitwarire, bishobora gusesengurwa ko amafi afite byuma bifasha kumva uburyohe bishobora gukorana n’ibinyabutabire bike birimo (CH), N -, na (CH2) 2S.

2.2 Nk'umutanga methyl

Amatsinda ya (CH) na S kuriDMPTMolekile ni isoko y'amatsinda ya methyl akenewe mu mikorere y'imirire y'inyamaswa. Hari ubwoko bubiri bwa methyltransferases (EC2.1.1.3 na EC2.1.1.5) mu mwijima w'inyamaswa bukoreshwa n'inyamaswa (CH) na S.

Byagaragaye ko ubwinshi bwa DMPT n'umuvuduko wa DMS mu turemangingo tw'ibimera byo mu nyanja byiyongereye uko umunyu wiyongera mu buryo bwo guhingwa bw'ibimera byo mu nyanja byatewe (Hymenonas carterae).

DMPTikungahaye ku tunyangingo tw’ibinyabuzima byinshi byo mu bwoko bwa phytoplankton, algae, n’utunyangingo nk’ibisimba na korali, ndetse no mu mafi ya krill n’amafi. Iida n’abandi (1986) bemeje ko ingano ya DMPT n’umusaruro wa DMS mu mafi bifitanye isano ryiza n’ingano ya DMPT mu mirire yabo, bigaragaza ko umuceri wa DMPT mu matungo uturuka ku byambo kandi ukinjira mu mubiri w’inyamaswa y’umuntu binyuze mu ruhererekane rw’ibiribwa mu bidukikije byo mu mazi. Algae ishobora gukora DMPT no kuyikusanya ku rugero rwo hejuru (3-5 mmol/L) mu mubiri. DMPT mu mafi na mollusks iri hafi y’urugero rwayo mu mirire, kandi ingano ya DMPT igaragaza ko ingano ya algae igabanuka (1 mmol/L), mollusks (0.1 mmol/L), n’amafi (0.01 mmol/L).

Uburyo bwa Fiziyoloji bwaDMPTIgikorwa

Mu myaka ya vuba aha, ubushakashatsi bwagaragaje ko DMPT igira ingaruka nziza ku imyitwarire yo kugaburira no gukura kw'amafi atandukanye yo mu mazi n'ayo mu mazi meza, inyamaswa zo mu bwoko bwa crustacean, n'ibinyamisogwe, bishobora kunoza ubushobozi bwabyo bwo kurwanya stress no gukora imyitozo ngororamubiri, kandi bikongera enzymes z'ingenzi za methyl nke mu mirire. Hakoreshejwe umwijima wa sea bream nk'ibikoresho by'igerageza n'ibindi bintu bitandukanye birimo (CH) na S - groups nk'ibinyabutabire, byagaragaye ko E C.2.1.1.3 na E imikorere ya enzyme iba iri hejuru cyane iyo DMPT ikoreshejwe nk'ibinyabutabire.

3. Ingaruka z'imirire za DMPT ku nyamaswa zo mu mazi

Ibinyabutabire makumyabiri bifite uburemere buke bwa molekile (CH) na S-groups byakoreshejwe mu igeragezwa ry’amafi yo mu mazi yo mu nyanja n’ayo mu mazi meza. Byagaragaye ko DMPT yagize ingaruka zikomeye ku imyitwarire yo kuruma y’ubwoko butatu bw’amafi, harimo tuna yo mu mazi meza, carp, na black crucian carp (Carassius auratus cuviera). Byanateje imbere cyane imyitwarire yo kugaburira amazi yo mu nyanja (Pagrus major) n’ibipimo bitanu (Seriola quinquera diata).

Vanga DMPT n'ibindi bintu birimo sulfur ku gipimo cya 1.0mmol/L mu ndyo zitandukanye zo kugerageza, hanyuma usimbuze itsinda rigenzura n'amazi yakuwemo kugira ngo ukore ibizamini byo kugaburira crucian carp. Ibisubizo byagaragaje ko mu matsinda ane ya mbere y'igerageza, itsinda rya DMPT ryari rifite impuzandengo y'ibipimo 126 byo kuruma kurusha itsinda rigenzura; Mu igerageza rya kabiri ry'amatsinda 5, itsinda rya DMPT ryari hejuru y'inshuro 262.6 kurusha itsinda rigenzura. Mu igerageza rigereranya na glutamine, byagaragaye ko ku gipimo cya 1.0mmol/L.