DMPT, CAS NO.: 4337-33-1. Ko te mea pai rawa atute mea kukume waiinaianei!

DMPTe mōhiotia ana ko te dimethyl-β-propiothetin, he mea nui te kitea i roto i ngā tipu rimu me ngā tipu teitei halophytic. He pānga whakatairanga tō te DMPT ki te pākia o te kai o ngā kararehe whakangote, heihei, me ngā kararehe wai (ika me te kōura). Ko te DMPT te matū he pānga kukume kaha rawa atu ki ngā kararehe wai i roto i ngā pūhui katoa e mōhiotia ana kei roto ko te (CH) me ngā rōpū-S.

1. Pūtake o te DMPT

Ko te dimethyl sulfide (DMS) i hangaia e Polysipho - nia fastigata i ahu mai iDMPT, he kaituku methyl whai hua anō hoki i roto i ngā rimurimu, ā, ko te DMPT te kaiwhakahaere osmotic matua o ngā rimurimu me te tipu paru Spartina angelica. He rerekē te ihirangi o te DMPT i waenga i ngā momo rimurimu rerekē, ā, he rerekē anō hoki te ihirangi o te momo rimurimu kotahi i ngā wā rerekē. Ka taea e te DMPT te tere ake i te whāngai me te tipu o ngā ika wai māori rerekē. He rerekē te pānga whakaawe kai o te DMPT i ētahi atu matū pēnei i ngā waikawa amino-L, i ngā nucleotide rānei, ā, he pānga whāngai me te whakatairanga tipu ki te nuinga o ngā kararehe wai.

2.1 Ngā Ligand Whai Hua hei Kaiwhakawhiwhi Reka

Kāore anō kia kitea he aha ngā rangahau mō ngā kaiwhakawhiwhi i roto i ngā whekau rongo matū o te ika ka taea te taunekeneke ki ngā rōpū-S (CH). Mai i ngā hua o ngā whakamātautau whanonga o nāianei, ka taea te tātari he tino kaiwhakawhiwhi reka kei ngā ika ka taea te taunekeneke ki ngā matū taumaha ngota iti kei roto ko ngā rōpū (CH), N-, me (CH2)2S-.

2.2 Hei kaituku methyl

Ko ngā rōpū (CH) me ngā rōpū-S i runga i teDMPTKo ngā ngota ngota ngā pūtake o ngā rōpū methyl e hiahiatia ana mō te pākia o te kai a ngā kararehe. E rua ngā momo methyltransferases (EC2.1.1.3 me EC2.1.1.5) i roto i te ate kararehe e whakamahia ana e ngā kararehe (CH) me S.

I kitea ko te kukū o te DMPT me te tere tukunga o te DMS i roto i ngā pūtau rimu i piki ake i te pikinga o te tote i roto i te reo whakatipu o te rimu i whakatipuria (Hymenonas carterae).

DMPTkei roto i ngā pūtau o te maha o ngā phytoplankton, ngā rimurimu, me ngā mollusk tauutuutu pērā i te kūtai me te korara, tae atu ki ngā tinana krill me ngā ika. I whakaū a Iida et al. (1986) he hononga pai te ihirangi o te DMPT me te whakaputanga o te DMS i roto i ngā ika ki te ihirangi DMPT i roto i ā rātou kai, e tohu ana ko te raihi DMPT i roto i ngā kararehe i ahu mai i te mōunu ka uru ki te tinana kararehe tangata mā te mekameka kai i roto i ngā rauropi moana. Ka taea e ngā rimurimu te hanga DMPT me te kohikohi i ngā taumata teitei (3-5 mmol/L) i roto i te tinana. Ko te DMPT i roto i ngā ika me ngā mollusk he tata ki ō rātou taumata i roto i te kai, ā, ko te kukū o te DMPT e whakaatu ana i te hekenga o te raupapa o ngā rimurimu (1 mmol/L), ngā mollusk (0.1 mmol/L), me ngā ika (0.01 mmol/L).

Te Tikanga ā-tinana oDMPTMahi

I ngā tau tata nei, kua kitea e ngā rangahau he pānga whakatairanga tō te DMPT ki te whanonga kai me te tipu o ngā ika moana me ngā ika wai māori, ngā pāpaka, me ngā mātaitai, ka taea te whakapai ake i ō rātou kaha ki te ārai i te ahotea me te whakakorikori tinana, me te tāpiri i ngā whākōkī matua o te rōpū methyl iti te kukū i roto i te kai. Mā te whakamahi i te ate o te pāpaka hei rauemi whakamātautau me ngā momo matū kei roto ngā rōpū (CH) me S- hei matū, i kitea ko te E C.2.1.1.3 me te E te mahi whākōkī ka tino teitei ina whakamahia te DMPT hei matū.

3. Ngā pānga kai o te DMPT ki ngā kararehe wai

E rua tekau ngā matū waro iti te taumaha ngota kei roto ko te (CH) me ngā rōpū-S i whakamahia mō te whanonga ngau me ngā whakamātautau hiko-tinana i runga i ngā ika wai moana me ngā ika wai māori. I kitea ko te DMPT te mea tino kaha ki te whakatairanga i te whanonga ngau o ngā momo ika e toru, tae atu ki te tuna wai māori, te kāpa, me te kāpa pango (Carassius auratus cuviera). I tino whakatairanga hoki i te whanonga kai o te unahi pono o te wai moana (Pagrus major) me ngā unahi e rima (Seriola quinquera diata).

Whakaranua te DMPT me ētahi atu matū kei roto he whanariki i te kukū o te 1.0mmol/L ki roto i ngā momo kai whakamātautau, ā, whakakapia te rōpū whakahaere ki te wai whakapūkara hei whakahaere i ngā whakamātautau urupare whāngai ki te ika crucian. I whakaatuhia e ngā hua i roto i ngā rōpū whakamātautau tuatahi e whā, ko te toharite o te rōpū DMPT he 126 ngā auau ngau teitei ake i te rōpū whakahaere; I roto i te whakamātautau tuarua o ngā rōpū 5, ko te rōpū DMPT he 262.6 ngā wā teitei ake i te rōpū whakahaere. I roto i tētahi whakamātautau whakatairite ki te glutamine, i kitea i te kukū o te 1.0mmol/L.