Cov paj rwb khoom qab zib floss thawj zaug tshwm sim ntawm 1904 Ntiaj Teb Kev Ncaj Ncees hauv St. Louis. Nyob rau ntawm qhov kev nthuav qhia, yuav luag txhua leej txhua tus tau qhuas los ntawm cov khoom siv no, uas tau dhau mus rau hnub no. Txhawm rau tso cai rau cov piam thaj kom dhau qhov kev hloov pauv, paj rwb khoom qab zib tshuab rau kev lag luam yog qhov tseem ceeb heev.
Lub hauv paus ntawm cov paj rwb khoom qab zib tshuab rau kev lag luam yog lub cua sov chamber uas tig ntawm kev kub ceev thiab kub heev. Thaum cov piam thaj muab tso rau hauv kab noj hniav, nws yuav xub yaj mus rau hauv syrup. Thaum lub sij hawm kev sib hloov ceev ntawm cov kab noj hniav, cov kua syrup yog muab pov rau ntawm ntug vim lub centrifugal quab yuam, thiab ntug yog densely them nrog ib tug nplhaib ntawm tsawg tshaj li ib millimeter inch. qhov uas syrup yog ejected. Txij li thaum qhov ceev ntawm cov khoom ua kua solidifies thaum raug mob khaub thuas muaj feem xyuam rau nws lub ntim, lub ntim me me, qhov ceev nws solidifies. Yog li ntawd, cov syrups ejected los ntawm cov me me qhov yuav tam sim ntawd condense rau hauv cov khoom qab zib threads. Yog tias tso cai rau tawg, qhov ntev tuaj yeem ncav cuag 5 txog 17 meters. Lawv txoj kab uas hla ua rau lawv zoo li willow threads swaying, thiab txias Cov qab zib threads yuav tsis lo ua ke. Nyob rau hauv xws li khaubncaws sab nraud povtseg ntawm entanglement, marshmallows tau yug los.
Qhov me me hauv qhov cua sov kab noj hniav, qhov zoo dua cov suab thaj xov uas tau txau tawm, thiab cov marshmallows qhwv nrog cov xov paj qab zib yog nruj dua thiab tsis tshua muaj kev xoob, thiab tuaj yeem ua rau ntau yam duab. Niaj hnub no cov zoo nkauj marshmallows siv qhov zoo heev, tsuas yog ob peb kaum ntawm microns hauv txoj kab uas hla. Nyob rau tib lub sijhawm, txhawm rau tiv thaiv cov piam thaj los ntawm kev thaiv lub qhov, qhov kev sib hloov ceev ntawm cov cua sov chamber kuj yuav tsum tau nce raws li.
Cov khoom siv raw ntawm marshmallow yog granulated qab zib, vim li cas ho tsis siv marshmallow? Vim tias cov ntsiab lus dej siab dhau lawm, cov tshuaj txau cov suab thaj yog mos heev thiab nyiam ua ke. granulated qab zib yog tsim los ntawm sucrose - granular cubic crystal. Cov molecules nyob rau hauv lub sucrose siv lead ua lattice yog teem kom zoo zoo, thiab txhua molecule muaj ib tug taag txoj hauj lwm. Txawm li cas los xij, thaum sucrose nkag mus rau hauv lub tshuab ua marshmallow, vim yog cua sov, cov qauv molecular hloov, uas yog, cov muaju yaj - cov cua sov ua rau cov qauv ntawm cov muaju thiab hloov cov suab thaj granulated rau hauv syrup.
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