Acetaldehyde. Helu a me ka thermal waiwai. E hoomakaukau ai, a ho ohana i

Acetaldehyde (nā inoa: acetaldehyde metilformaldegid, ethanal) - mea he aloha i huiia , no a hiki i ka papa o aldehydes. Kēia waiwai a ua nui no ka kānaka, ka mea, ua loaʻa i loko o kope, i ka berena,ʻai i oʻo mua, aʻai. Synthesized ma ka mea kanu. Ua lŘlŘ maoli ai, a ua hua mai i ka nui na mea ma ka ke kanaka. Acetaldehyde haʻilula: CH3-ma.

physical waiwai

1. Acetaldehyde - he colorless wai a me kaʻoi kaʻawaʻawa loa ala.
2. He hooholo koke wailana i loko o Etera, ka waiʻona a me ka wai.
3. Ka molar nui o 44,05 nā huna / kameleona.
4. ka pa apŘ o 0,7 g. / Santimetr³.

thermal waiwai

1. ka mahele heheʻe i ka wahi o -123 degere.
2. ka baila aʻela i wahi ka 20 degere.
3. ka mea hō'ā kaʻa ka mahana Ua like ia -39 degere.
4. Na mea hō'ā kaʻa ka mahana o 185 degere.

e hoomakaukau ai acetaldehyde

1. Ke kumu o kaʻina hana no ka hoʻomākaukau o keia waiwai o loko o ka'okesaside o'etolina (no laila, i kapaʻia-Wacker kaʻina). Ua nana e like keia naoh:
2CH2 = C2H4 ('etolina) + O2 (oxygen) = 2CH3CHO (metilformaldegid)

2. A, acetaldehyde hiki ke hua mai la ma ka hydration o ka acetylene i loko o ke alo o Hereme paʻakai (ai-kapa naoh Kucherova). Kēia i hāʻawi mai i ka phenol i ua laila isomerized i ka aldehyde.

3.ʻO kēia papa hana ua kaulana ma mua o ka Hekikai o ka mea ma luna kaʻina. Hana ai ma ka'okesaside a dehydrogenation o ethanol ma ke kala, a me ke keleawe hōʻeleu.

palapala noi acetaldehyde

- Pono acetaldehyde No ka i waiwai? Aceticʻakika, butadiene, aldehyde polymers, a me kekahi'ē aʻe ke aloha 'ona.
- hoʻohana like me ka precursor (i ka waiwai e komo ia haumāna ma ka naoh alakai ai i ka haku o ka pale umauma hoʻokahi waiwai) i aceticʻakika. Eia naʻe, no ka mea mākou e noʻonoʻo e pili i ka waiwai koke malie iho la. Ua hiki no ka mea, i ka aceticʻakika mea simpler a ho'ēmi e paka mai METALON ma keʻano o ka hanaʻana Kativa a me Monsanto.
- Metilformaldegid - nui i precursor e pentaerythritol, pyridine nā mea loaʻa a me krotonaldegidu.
- e hoomakaukau ai no na kēpau aie i ka mea i urea a me acetaldehyde i ka hiki e Punk.
- e hoomakaukau ai no ethylidene diacetate mai i a laila paka Tewetewe lātoma (vinyl'ākeka).

Paka kaukaʻi a me ka acetaldehyde

Kēia waiwai a pau - he nui hapa o ka paka uwahi. h ÷ ike i paʻa nei, kahi ia i hoike ia ka synergistic pilina o aceticʻakika me ka nicotine i maoli i ka hōʻike o ke kaukaʻi (pakahi aku la ia i ka poe malalo o kanakolu makahiki).

Alzheimer ka mai a me ka acetaldehyde

O na kanaka, ka mea e ole i ka aaiaoe ololi metilformaldegida huli ana i loko o aceticʻakika, i ke kiʻekiʻe pilikia o ka predisposition i na maʻi like senile dementia (a Alzheimer ka maʻi), i IeAUPIIe, IAa IO ia lŘlŘ ma mua makahiki.

Alcohol a me ka metilformaldegid

Presumably mākou e noonoo pono i ka waiwai mea carcinogenic i kānaka, me ka i keia la, he mea hoike no carcinogenic acetaldehyde i loko o nā holoholona hoʻokolohua. Eia kekahi, metilformaldegid piʻi DNA, ma laila e kauoha ana i ka disproportionate kino kaumaha kūpono 'ana o ka muscular oihana, a ua pili i ka' aʻe 'ana o kumuʻiʻo pūnao i loko o ke kino. Ua paa ke ao o ka 800 alcoholics, ma i noiʻi manao i kanaka waiho kokoke ana i acetaldehyde, he mea he kina ma ka'ōewe no kekahi'ūhū - ka waiʻona dehydrogenase. No keia kumu, ua hoʻomanawanui iki mai i ma kamepiula nui o ka ulu maʻi 'aʻai o nā puʻupaʻa, a me ka luna o ke akepaʻa.

maluhia

Ka waiwai meaʻawahia. He He contaminant o ka lewa i loko e uwahi ana paha exhausts ma ke kalepa Jam.