Cov kev pab cuam thiab harms ntawm nyeem fatty acids

Cov npe no muaj tau nws chaw ntev dhau los - txij thaum ntawd los, thaum noob neej yog ib qho nyuaj rau siv zog rau kev sib raug zoo. Yog tias thaum tham txog cov kev pab cuam thiab kev piam sij ntawm roj. Soj ntsuam ntawm cov dej num raws li lawv cov tshuaj qauv rau lub hauv paus ntawm lub xub ntiag ntawm ob bonds. Qhov kuaj pom los yog tsis tuaj kawm ntawv ntawm lub yav tas ua rau nws tau cais cov fatty acids mus rau hauv ob pawg: nyeem thiab unsaturated.

Cov khoom ntawm txhua tus ntawm lawv hais tias ib tug ntau, thiab nws yog ntseeg hais tias cov thawj hais txog cov kev pab rog, tab sis lub thib ob yog tsis. Unequivocally paub meej tias qhov tseeb ntawm no xaus, los yog mus rau refute nws yog fundamentally tsis ncaj ncees lawm. Tej yam ntuj tso lub caij muaj ib tug nqi rau tag nrho cov kev loj hlob ntawm tus txiv neej. Nyob rau hauv lwm yam lus, ua kom to taub, dab tsi yog cov kev pab thiab seb tus mob los ntawm kev siv ntawm nyeem fatty acids.

Nta ntawm cov tshuaj mis

Yog hais tias mus nyob rau hauv cov nqe lus ntawm lawv cov molecular qauv, qhov tseeb kauj ruam yog mus nrhiav kev pab los ntawm science. Ua ntej, nco qab lub Science News for KIDS, peb nco ntsoov tias cov fatty acids yog inherently hydrocarbon tebchaw thiab lawv atomic qauv yog tsim raws li ib tug saw. Ob, qhov tseeb hais tias cov pa roj carbon atoms tetravalency. Thiab nyob rau thaum xaus ntawm lub saw yog kev cob cog rua nrog peb hais hydrogen thiab ib cov pa roj carbon. Nyob rau hauv nruab nrab ntawm lawv ib puag ncig los ntawm ob carbon atoms thiab hydrogen. Raws li koj tau pom, lub Circuit Court yog kiag li lawm ua tus sau - tsis muaj tau rau cov kev twb kev txuas ntawm tsawg kawg yog ib tug ntau hydrogen hais.

Qhov zoo tshaj plaws sawv cev uas fatty acid mis. Qhov no tshuaj, uas nws molecule yog ib tug carbon saw nyob rau hauv lawv cov tshuaj qauv no yuav yooj yim rau lwm cov rog thiab muaj ib tug txawm tooj ntawm cov pa roj carbon atoms. Nws lub npe yog muab los ntawm ib tug nyeem hydrocarbon system nrog ib tug tej ntev ntawm lub saw. Cov mis nyob rau hauv lub dav dav daim ntawv:

CH3- (CH2) n-COOH

Ib txhia thaj chaw ntawm cov tebchaw yog yus muaj los ntawm ib tug taw qhia xws li melting kub. Tsis tas li ntawd, lawv muab faib ua hom: tsawg molecular nyhav thiab siab molecular ceeb thawj. Cov yav tas los muaj ib tug tau taub hau, qhov thib ob - kua, ntau dua qhov lub hniav puas loj, qhov ntau dua tus nqi kub uas lawv yaj.

Nyeem fatty acids uas tseem hu ua monobasic, vim lub fact tias lawv cov qauv tsis muaj ob chav bonds ntawm nyob ib sab carbon atoms. Qhov no ua rau lub fact tias lawv reactivity txo - tib neeg lub cev yog yam nyuab dua rau phua rau lawv, thiab tus txheej txheem no yog li ntawd yuav tsum tau ntau zog.

yam ntxwv nta

Qhov tseem ceeb sawv cev, thiab tej zaum cov feem ntau nto moo ntawm nyeem fatty acid yog palmitic acid, los yog raws li nws yog hu ua, hexadecanoic. Nws molecule muaj 16 carbon atoms (C16: 0) thiab ib zaug xwb ob daim ntawv cog lus. Kwv yees li 30-35 feem pua ntawm nws yog muaj nyob rau hauv tib neeg lipids. Qhov no yog ib qho ntawm lub ntsiab hom txwv acids nyob rau hauv cov kab mob. Nws tseem yog tam sim no nyob rau hauv cov tsiaj nqaijrog thiab ntau yam xov tooj ntawm cov nroj tsuag, piv txwv li, nyob rau hauv lub hais tsis zoo xibtes roj.

Ib tug loj tus naj npawb ntawm cov pa roj carbon atoms yog yus stearic thiab arachidic nyeem fatty acids, uas muaj xws li, ntsig txog, ntawm mis 18 thiab 20. Ua ntej nyob rau hauv ib tug loj kom muaj nuj nqis nyob rau hauv mutton rog - no nws yuav ua tau mus txog 30%, thiab nws yog tam sim no nyob rau hauv zaub roj - txog 10%. Arachidic, los yog - nyob rau hauv raws li nws systematic lub npe - eicosanoic muaj nyob rau hauv qab zib thiab txiv laum huab xeeb roj.

Tag nrho cov ntawm cov tshuaj yog ib tug high-molecular tebchaw thiab khoom nyob rau hauv lub taub hau.

"Nyeem" cov khoom

Niaj hnub no tsis muaj lawv yog ib qho nyuaj rau xav txog tej yam niaj hnub chav ua noj. Tsis txhob fatty acids uas yog nyob rau hauv cov zaub mov thiab cov tsiaj thiab zaub keeb kwm. Txawm li cas los, muab piv rau cov ntsiab lus nyob rau hauv ob qho tib si pawg, nws yuav tsum tau muab sau tseg hais tias ib tug ntau feem pua ntawm lawv nyob rau hauv thawj cov ntaub ntawv tshaj nyob rau hauv lub thib ob.

Rau cov ntawv teev cov khoom uas muaj ib tug loj npaum li cas ntawm nyeem cov rog muaj xws li tag nrho cov nqaij cov khoom: nqaij npuas, nqaij nyuj, yaj thiab ntau yam ntawm cov noog. Pab pawg neeg cov khoom noj siv mis kuj khav ntawm lub xub ntiag ntawm: ice cream, qaub cream, butter, ntawm no nws yog tau mus nqa cov mis nyuj nws tus kheej. Tsis tas li ntawd limiting rog muaj nyob rau hauv tej yam hom zaub roj: xibtes thiab txiv maj phaub.

Ib me ntsis ntawm ib tug dag khoom

Cov pab pawg neeg ntawm nyeem fatty acids thiab xws li tej "kev kawm" ntawm cov niaj hnub khoom noj khoom haus kev lag luam raws li trans nqaijrog. Npaj los ntawm hydrogenation ntawm zaub roj. Lub essence ntawm tus txheej txheem yog hais tias lub kua zaub roj nyob rau hauv siab thiab nyob kub txog li 200 degrees yog raug mus rau lub gaseous active hydrogen. Cov no ib tug tshiab khoom - hydrogenated muaj ib tug nkhaus molecular qauv hom. Nyob rau hauv lub natural ib puag ncig ntawm no zoo yog tsis muaj kev twb kev txuas. Lub hom phiaj ntawm qhov no transformation yog raws kev coj tsis tsuas mus rau cov kev pab ntawm tib neeg noj qab haus huv, thiab yog tshwm sim los ntawm lub siab xav kom tau "xis" khoom khoom uas pab txoj kev saj, nrog ib tug zoo kev ntxhib los mos thiab ib tug ntev lub txee lub neej.

Luag hauj lwm ntawm nyeem fatty acids nyob rau hauv tib neeg lub cev tau hauj lwm

Lom zog muab rau cov tebchaw xws li mus muab lub cev nrog lub zog. Zaub lawv cov neeg sawv cev yog ib tug raw khoom siv los ntawm lub cev mus rau daim ntawv cell week, raws li zoo raws li lub hauv paus ntawm lub lom tshuaj uas koom tes nyob rau hauv cov kev cai ntawm cov ntaub so ntswg muaj dab. Qhov no yog tshwj xeeb tshaj yog muaj tseeb vim lub nce nyob rau hauv xyoo tsis ntev los, txoj kev pheej hmoo ntawm lub tsim ntawm phem hlav. Nyeem fatty acids uas yog muab kev koom tes nyob rau hauv lub synthesis ntawm cov tshuaj hormones, vitamins thiab assimilation ntawm ntau yam ib txoj lw ntsiab. Txo kev noj yuav adversely muaj feem xyuam rau cov kev kho mob ntawm cov txiv neej, vim hais tias lawv yog muab kev koom tes nyob rau hauv zus tau tej cov testosterone.

Benefit los yog raug mob ntawm cov roj nyeem

Cov lus nug txog lawv cov kev piam sij yog tseem qhib, vim hais tias ncaj kev twb kev txuas nrog cov emergence ntawm tus kab mob tau lawm tias. Txawm li cas los, muaj lub assumption uas ntev li siv tsub kom kev pheej hmoo ntawm ib tug xov tooj ntawm yus cov kab mob.

Yuav ua li cas yuav hais tau nyob rau hauv tiv thaiv ntawm lub fatty acids

Ntev txaus nyeem cov khoom "liam ntawm kev koom tes nyob rau hauv" ua rau kom cov theem ntawm cov cholesterol nyob rau hauv cov ntshav. Niaj hnub nimno Dietetics tau ntsib lawv nrhiav tau hais tias tus muaj nyob rau hauv cov nqaij ntawm palmitic acid thiab stearic nyob rau hauv khoom noj siv mis yog nyob rau hauv nws tus kheej nyob rau hauv tsis muaj txoj kev xav txog cov ntaub ntawv ntawm "teeb meem" cholesterol. Lub culprit ntawm nws nce tau pom carbohydrates. Thaum lawv cov uas tsis muaj cov ntsiab lus ntawm fatty acids tsis txhob ua tej kev tsim txom.

Nws twb tseem pom tias kom txhob carbohydrate tsawg thaum ua qhov nyiaj ntawm noj "noo khoom" muaj txawm tias ib tug me ntsis nce nyob rau hauv cov theem ntawm "zoo" cholesterol, tawm tswv yim lawv usefulness.

Nws yuav tsum tau muab sau tseg tias nyob rau hauv ib tug tej theem ntawm lub neej no zoo nyeem fatty acids yog ua ib tug yuav tsum. Nws yog lub npe hu hais tias leej niam lub mis mis nyuj yog nplua nuj nyob rau hauv lawv thiab yog txhawb nqa ib leeg rau ib tug me nyuam. Yog li ntawd, rau cov me nyuam thiab cov neeg uas tsis muaj zog noj qab haus huv ntawm kev siv ntawm tej khoom yuav coj cov kev pab cuam.

Nyob rau hauv tej rooj plaub, lawv yuav ua rau mob

Yog hais tias lub hnub intake ntawm carbohydrates yog ntau tshaj li 4 grams ib kilogram ntawm lub cev hnyav, nws yuav tau pom raws li ib tug tsis zoo feem nyob rau kev kho mob ntawm nyeem fatty acids. Piv txwv ntawm no fact: palmitic acid, uas yog nyob rau hauv cov nqaij provokes ib tug txo ntawm insulin ua si, stearic acid, tam sim no nyob rau hauv khoom noj siv mis kev koom txhawb rau tsim ntawm subcutaneous roj deposits, thiab ib tug tsis zoo ntxim rau cov hlab plawv system.

Ntawm no, nws yuav xaus lus tias ib qho kev nce nyob rau hauv carbohydrate tsawg yog tau txhais lub "nplua nuj" khoom nyob rau hauv qeb ntawm tsis zoo.

Qab noj qab haus huv kev hem thawj

Characterizing "ua los ntawm qhov" nyeem fatty acids, cov kev puas tsuaj uas tsis tau muaj pov thawj, peb yuav tsum tau nco ntsoov txog dag - hydrogenated, tau los ntawm cov yuam kev tsuas xyaus zaub rog nrog hydrogen.

Qhov no yuav tsum muaj xws li margarine, uas yog kev lom zem ntau vim nws tsis muaj nqi, nws yog dav siv: nyob rau hauv qhov siv thiab ua ntau yam confectionery khoom, tag nrho cov hom ntawm semi-tiav lawm thiab nyob rau hauv qhov chaw catering rau ua noj ua haus. Cov kev siv ntawm cov khoom no thiab nws cov derivatives tsis muaj dab tsi zoo yuav tsis tau tuav kev kho mob. Ntxiv mus, nws provokes loj cov kab mob xws li ntshav qab zib, mob cancer, mob plawv, vascular occlusion.