[Latin Lub Npe] Huperzia serratum

[Source] Huperziceae tag nrho tshuaj ntsuab los ntawm Tuam Tshoj

[Zoo] Xim av rau dawb

[Cov khoom xyaw] Huperzine A

[Specification] Huperzine A 1% - 5%, HPLC

[Solubility] Soluble hauv chloroform, methanol, ethanol, me ntsis soluble hauv dej

[Particle loj] 80 Mesh

[Poob ntawm ziab] ≤5.0%

[Heavy Hlau] ≤10PPM

[Pesticide residue] EC396-2005, USP 34, EP 8.0, FDA

[Storage] Khaws rau hauv qhov chaw txias & qhuav, kom deb ntawm lub teeb ncaj qha thiab cua sov.

[Lub neej txee] 24 Lub Hlis

[Package] Ntim hauv ntawv-nruas thiab ob lub hnab yas hauv.

[Dab tsi yog Huperzine A]

Huperzia yog hom moss uas loj hlob hauv Suav teb. Nws muaj feem xyuam rau cov qws mosses (Lycopodiaceae tsev neeg) thiab paub txog qee cov botanists li Lycopodium serratum . Tag nrho cov moss npaj tau siv ib txwm siv. Kev npaj tshuaj ntsuab niaj hnub tsuas yog siv cov alkaloid cais hu ua huperzine A. Huperzine A yog alkaloid pom nyob rau hauv huperzia uas tau tshaj tawm los tiv thaiv kev tawg ntawm acetylcholine, ib yam khoom tseem ceeb uas xav tau los ntawm lub paj hlwb kom xa cov ntaub ntawv ntawm tes mus rau ntawm tes. Kev tshawb fawb tsiaj tau pom tias huperzine A lub peev xwm khaws cia acetylcholine yuav ntau dua li ntawm qee cov tshuaj. Kev poob ntawm acetylcholine muaj nuj nqi yog qhov tseem ceeb ntawm ntau yam kev ua haujlwm ntawm lub paj hlwb, suav nrog Alzheimer's disease. Huperzine A kuj tseem tuaj yeem tiv thaiv cov ntaub so ntswg ntawm lub hlwb, ntxiv dag zog rau nws txoj kev muaj peev xwm los pab txo cov tsos mob ntawm qee lub hlwb.

[Function] Siv lwm cov tshuaj, huperzine A tau pom tias ua raws li cholinesterase inhibitor, ib hom tshuaj siv los tiv thaiv kev tawg ntawm acetylcholine (ib yam tshuaj tseem ceeb rau kev kawm thiab kev nco).

Tsis tsuas yog siv los ua kev kho mob Alzheimer's tus kab mob, huperzine A kuj tau hais los txhim kho kev kawm thiab kev nco thiab tiv thaiv lub hnub nyoog ntsig txog kev txawj ntse poob.

Tsis tas li ntawd, huperzine A yog qee zaum siv los txhawb lub zog, nce kev ceeb toom, thiab pab kho myasthenia gravis (ib qho kab mob autoimmune uas cuam tshuam rau cov leeg).

Daim vis dis aus no qhia koj yuav ua li cas hais lus Japonica

Chemistry playlist: https://www.youtube.com/playlist?list=PL_hX5wLdhf_KyuOalV6rwHjo810Zaa6xq

ntxiv ntawm https://scitech.quickfound.net/

Txheej txheem cej luam ntawm yuav ua li cas plastics & hluavtaws roj hmab ua.

Reupload ntawm ib zaj yeeb yaj kiab yav dhau los nrog txhim kho video & suab.

Pej xeem sau zaj duab xis los ntawm Lub Tsev Qiv Ntawv ntawm Congress Prelinger Archives, me ntsis cropped kom tshem tawm cov npoo tsis sib xws, nrog rau qhov sib piv raug kho, thiab ib qho kev ci ntsa iab-qhov sib txawv-xim kho & me me video suab txo tau thov.
Lub suab nrov kuj tau ua tiav nrog ntim normalization, txo suab nrov, txo qis, thiab / lossis kev sib npaug (lub suab tshwm sim, txawm tias tsis zoo tag nrho, tsis tshua muaj suab nrov dua li qub).

https://creativecommons.org/licenses/by-sa/3.0/

https://en.wikipedia.org/wiki/Polymer

Ib tug polymer yog ib tug loj molecule (macromolecule) muaj li ntawm rov ua qauv units. Cov sub-units no feem ntau txuas nrog covalent chemical bonds. Txawm hais tias lub sij hawm polymer yog qee zaum coj los xa mus rau cov yas, nws ua tau suav nrog cov chav kawm loj ntawm cov tebchaw uas muaj cov khoom siv ntuj thiab hluavtaws nrog ntau yam khoom.

Vim tias muaj ntau yam tshwj xeeb ntawm cov khoom ntawm cov khoom siv polymeric, lawv ua lub luag haujlwm tseem ceeb thiab muaj nyob hauv lub neej txhua hnub. Lub luag haujlwm no yog los ntawm cov khoom siv hluavtaws uas paub zoo thiab elastomers mus rau ntuj biopolymers xws li nucleic acids thiab cov proteins uas tseem ceeb rau lub neej.

Cov ntaub ntawv ntuj polymeric xws li shellac, amber, wool, silk thiab natural rubber tau siv rau ntau pua xyoo. Ntau yam ntawm lwm yam ntuj polymers muaj nyob, xws li cellulose, uas yog cov ntsiab lus tseem ceeb ntawm ntoo thiab ntawv. Cov npe ntawm cov khoom siv hluavtaws muaj xws li hluavtaws roj hmab, Bakelite, neoprene, nylon, PVC, polystyrene, polyethylene, polypropylene, polyacrylonitrile, PVB, silicone, thiab ntau ntxiv.

Feem ntau, cov pob txha txuas txuas txuas ntxiv ntawm cov polymer siv rau kev npaj cov yas feem ntau yog cov pa roj carbon atoms. Ib qho piv txwv yooj yim yog polyethylene ('polythene' hauv Askiv Askiv), uas nws rov ua dua yog raws li ethylene monomer. Txawm li cas los xij, muaj lwm cov qauv; Piv txwv li, cov khoom xws li silicon tsim cov ntaub ntawv paub zoo xws li silicones, piv txwv yog Silly Putty thiab cov kav dej tsis muaj dej. Cov pa oxygen kuj tseem muaj nyob hauv cov pob txha polymer, xws li cov polyethylene glycol, polysaccharides (hauv glycosidic bonds), thiab DNA (hauv phosphodiester bonds).

Polymers tau kawm hauv thaj chaw ntawm polymer chemistry, polymer physics, thiab polymer science…

Polymerization yog cov txheej txheem ntawm kev sib txuas ntau cov molecules me me hu ua monomers rau hauv cov sib txuas sib txuas los yog lub network. Thaum lub sijhawm txheej txheem polymerization, qee pawg tshuaj yuav raug ploj ntawm txhua tus monomer. Qhov no yog cov ntaub ntawv, piv txwv li, nyob rau hauv lub polymerization ntawm PET polyester. Cov monomers yog terephthalic acid (HOOC-C6H4-COOH) thiab ethylene glycol (HO-CH2-CH2-OH) tab sis qhov rov ua dua chav tsev yog -OC-C6H4-COO-CH2-CH2-O-, uas sib haum rau kev sib xyaw ntawm cov ob monomers nrog poob ntawm ob dej molecules. Qhov sib txawv ntawm txhua tus monomer uas tau muab tso rau hauv cov polymer yog hu ua ib chav tsev rov ua dua lossis monomer residue…

https://en.wikipedia.org/wiki/Synthetic_rubber

Synthetic roj hmab yog txhua yam khoom siv elastomer, uas tsis yog ib qho polymer. Ib qho elastomer yog cov khoom siv nrog cov khoom siv (los yog cov khoom siv) uas nws tuaj yeem ua rau ntau dua elastic deformation nyob rau hauv kev ntxhov siab dua li cov ntaub ntawv feem ntau thiab tseem rov qab mus rau nws qhov loj me dhau los yam tsis muaj deformation mus tas li.Hais txog 15 billion kilograms ntawm cov roj hmab tau tsim txhua xyoo, thiab ntawm qhov ntawd. tus nqi ob feem peb yog hluavtaws…

Natural vs hluavtaws roj hmab

Cov roj hmab ntuj, los ntawm latex, feem ntau yog poly-cis-isoprene uas muaj cov kab mob ntawm impurities. Txawm hais tias nws nthuav tawm ntau yam khoom zoo heev, cov roj hmab ntuj feem ntau tsis zoo rau cov roj hmab hluavtaws, tshwj xeeb tshaj yog hais txog nws cov thermal stability thiab nws compatibility nrog cov khoom siv roj av.

Synthetic roj hmab yog tsim los ntawm polymerization ntawm ntau yam roj av-raws li precursors hu ua monomers. Cov roj hmab hluavtaws uas nrov tshaj plaws yog styrene-butadiene rubbers (SBR) muab tau los ntawm copolymerization ntawm styrene thiab 1,3-butadiene. Lwm cov roj hmab hluavtaws yog npaj los ntawm isoprene (2-methyl-1,3-butadiene), chloroprene (2-chloro-1,3-butadiene), thiab isobutylene (methylpropene) nrog ib feem me me ntawm isoprene rau kev sib txuas. Cov no thiab lwm cov monomers tuaj yeem muab sib xyaw rau hauv ntau qhov sib npaug los ua copolymerized los tsim cov khoom lag luam nrog ntau yam ntawm lub cev, tshuab, thiab tshuaj lom neeg. Cov monomers tuaj yeem tsim cov ntshiab thiab qhov sib ntxiv ntawm impurities lossis additives tuaj yeem tswj tau los ntawm kev tsim kom pom cov khoom zoo. Polymerization ntawm ntshiab monomers tuaj yeem tswj tau zoo dua los muab qhov kev xav tau ntawm cis thiab trans ob daim ntawv cog lus…