{"id":991158,"date":"2024-08-03T10:40:33","date_gmt":"2024-08-03T07:40:33","guid":{"rendered":"https:\/\/www.wayanatapas.com\/?p=991158"},"modified":"2026-07-14T11:58:56","modified_gmt":"2026-07-14T08:58:56","slug":"sarabin-bacaklari-ya-da-sarabin-gozyaslari","status":"publish","type":"post","link":"https:\/\/www.wayanatapas.com\/en\/sarabin-bacaklari-ya-da-sarabin-gozyaslari\/","title":{"rendered":"Wine Legs or Wine Tears"},"content":{"rendered":"
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\u015earap severlerin duyusal analizlerinde en \u00e7ok ilgisini \u00e7eken estetik anlardan biri, \u00e7evrilen bir kadeh kenar\u0131nda s\u00fcz\u00fclen o narin s\u0131v\u0131 bacaklar\u0131d\u0131r. \u015earapla ha\u015f\u0131r ne\u015fir olmaya ba\u015flayan herkesin dile getirdi\u011fi sorular\u0131n ba\u015flar\u0131nda \u015farap kadehinden i\u00e7 y\u00fcz\u00fcnden s\u00fcz\u00fclerek a\u015fa\u011f\u0131ya do\u011fru akan inceli kal\u0131nl\u0131 su kanallar\u0131 gelir. Ba\u015fl\u0131kta yer alan iki deyi\u015f de kullan\u0131l\u0131r bu kanallar i\u00e7in: \u015farab\u0131n bacaklar\u0131 veya \u015farab\u0131n g\u00f6zya\u015flar\u0131. Bu konudaki sohbetlerin hepsinin amac\u0131 g\u00f6r\u00fclen bu ak\u0131nt\u0131n\u0131n \u015farab\u0131n niteli\u011fiyle ilgili olup olmad\u0131\u011f\u0131n\u0131 anlamakt\u0131r. Acaba nas\u0131l olursa bu ak\u0131nt\u0131lar \u015farab\u0131n kaliteli oldu\u011funu g\u00f6sterir?<\/p>\r\n\r\n\r\n\r\n

Let's first try to understand the fundamental physical reality behind these flows and then evaluate whether there are sufficient conditions for making a judgment. The flows we see in the glass are shaped by the chemical composition of the wine, temperature, humidity, and the shape of the container. Let's explore how this process occurs.<\/p>\r\n\r\n\r\n<\/div>

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\"Kadeh\"<\/figure>\r\n<\/div><\/div>
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Ak\u0131\u015fkanlar Mekani\u011fi ve Marangoni Etkisinin Kimyasal S\u0131rr\u0131<\/h2>\r\n

Kadehi hafif\u00e7e \u00e7evirdi\u011fimizde \u00e7eperlerde y\u00fckselen ve ard\u0131ndan ince damlalar halinde s\u00fcz\u00fclen “\u015farab\u0131n bacaklar\u0131”, san\u0131lan\u0131n aksine \u015farab\u0131n kalitesine, asaletine ya da zanaatk\u00e2rl\u0131\u011f\u0131na dair hi\u00e7bir duyusal referans sunmaz. Bu g\u00f6rsel \u015f\u00f6len, fizik literat\u00fcr\u00fcnde “Marangoni etkisi” (veya Gibbs-Marangoni etkisi) olarak adland\u0131r\u0131lan, iki farkl\u0131 s\u0131v\u0131 aras\u0131ndaki y\u00fczey gerilimi gradyanlar\u0131ndan kaynaklanan bir ak\u0131\u015fkanlar mekani\u011fi mucizesidir. \u015earap, temelde su ve etil alkol olmak \u00fczere iki farkl\u0131 u\u00e7uculu\u011fa sahip s\u0131v\u0131dan olu\u015fur. Alkol\u00fcn buharla\u015fma h\u0131z\u0131 ve y\u00fczey gerilimi, suyunkinden \u00e7ok daha d\u00fc\u015f\u00fckt\u00fcr. Kadehin \u00e7eperine t\u0131rmanan ince \u015farap tabakas\u0131ndaki alkol, havayla temas etti\u011fi anda sudan \u00e7ok daha h\u0131zl\u0131 buharla\u015f\u0131r. Alkol oran\u0131 aniden d\u00fc\u015fen bu b\u00f6lgede y\u00fczey gerilimi h\u0131zla t\u0131rman\u0131r; gerilimi y\u00fcksek olan su, a\u015fa\u011f\u0131daki alkoll\u00fc \u015farab\u0131 yukar\u0131ya do\u011fru \u00e7eker. Kadehin \u00e7eperinde biriken bu s\u0131v\u0131 k\u00fctlesi, yer\u00e7ekimine daha fazla direnemeyecek bir a\u011f\u0131rl\u0131\u011fa ula\u015ft\u0131\u011f\u0131nda yer\u00e7ekiminin etkisiyle s\u00fcz\u00fclerek kadehin bacaklar\u0131n\u0131 olu\u015fturur.<\/p>\r\n

Alkol Yo\u011funlu\u011fu ve Viskozite: Bacaklar Bize Ne Anlat\u0131r?<\/h2>\r\n

Bacaklar\u0131n kal\u0131nl\u0131\u011f\u0131, s\u00fcz\u00fclme h\u0131z\u0131 ve s\u0131kl\u0131\u011f\u0131 \u015farab\u0131n kalitesini tescillemese de, o kadehteki s\u0131v\u0131ya dair en rasyonel iki enolojik parametreyi \u2014\u015farab\u0131n alkol derecesini ve g\u00f6vde yap\u0131s\u0131n\u0131 etkileyen ak\u0131\u015fkanl\u0131\u011f\u0131n\u0131 (yani viskozitesini)\u2014 \u00e7\u0131plak g\u00f6zle analiz etmemizi sa\u011flar. Alkol oran\u0131 y\u00fcksek \u015faraplarda (\u00f6zellikle %14 ve \u00fczeri g\u00f6vdeli k\u0131rm\u0131z\u0131larda veya ge\u00e7 hasat tatl\u0131 \u015faraplarda) buharla\u015fma fark\u0131 \u00e7ok daha keskin olaca\u011f\u0131 i\u00e7in, olu\u015fan bacaklar \u00e7ok daha belirgin, s\u0131k ve yava\u015f s\u00fcz\u00fclen birer g\u00f6zya\u015f\u0131 patikas\u0131 olu\u015fturur. \u015earapta alkolle birlikte “gliserol” (fermentasyon s\u0131ras\u0131nda mayalar\u0131n \u00fcretti\u011fi do\u011fal bir yan \u00fcr\u00fcn) ve kuru madde \u00f6z\u00fct\u00fc artt\u0131k\u00e7a, s\u0131v\u0131n\u0131n viskozitesi (ak\u0131\u015fkanl\u0131\u011fa kar\u015f\u0131 g\u00f6sterdi\u011fi diren\u00e7) de t\u0131rman\u0131r. Dolay\u0131s\u0131yla, kadehte sab\u0131rla s\u00fcz\u00fclen o narin bacaklar, \u00f6nolo\u011fa \u015farab\u0131n mahzendeki g\u00f6vde in\u015fas\u0131, alkol potansiyeli ve olgunla\u015fma yo\u011funlu\u011fu hakk\u0131nda rasyonel, kimyasal ve fiziksel birer \u00f6n bilgi sunmaktad\u0131r.<\/p>\r\n

Kadehimizin i\u00e7indeki \u015farab\u0131 \u00e7evirerek kar\u0131\u015ft\u0131rd\u0131\u011f\u0131m\u0131zda, kadehin i\u00e7 y\u00fcz\u00fcn\u00fc ince bir s\u0131v\u0131 film tabakas\u0131 kaplar. Bu ince \u00f6rt\u00fcn\u00fcn i\u00e7inde hem alkol hem de su molek\u00fclleri vard\u0131r. U\u00e7ucu olan alkol h\u0131zla havaya kar\u0131\u015f\u0131nca hem su molek\u00fclleri hem de daha a\u011f\u0131r yap\u0131daki tanen ve \u015feker molek\u00fclleri barda\u011f\u0131n i\u00e7 y\u00fcz\u00fcnde damlalar olu\u015ftururlar. \u0130\u015fte bu damlalar yer\u00e7ekimi etkisiyle a\u015fa\u011f\u0131ya do\u011fru s\u00fcz\u00fclerek \u015farab\u0131n g\u00f6zya\u015flar\u0131n\u0131 veya bacaklar\u0131n\u0131 meydana getirirler.<\/p>\r\n\r\n\r\n\r\n

Merakl\u0131lar i\u00e7in tekrar edelim: Bu olay fizikte, yukar\u0131da ayr\u0131nt\u0131l\u0131 bi\u00e7imde anlatt\u0131\u011f\u0131m\u0131z gibi Gibbs-Marangoni etkisi olarak adland\u0131r\u0131l\u0131r; ad\u0131n\u0131 da teoremi geli\u015ftiren bilim insanlar\u0131n\u0131n soyadlar\u0131ndan al\u0131r. \u00d6zetleyecek olursak, ak\u0131nt\u0131lar\u0131n olu\u015fumu s\u0131v\u0131lar\u0131n y\u00fczey gerilimleri aras\u0131ndaki farktan ileri gelir.<\/p>\r\n\r\n\r\n\r\n

Gelelim esas merak etti\u011fimiz k\u0131sma: Bu ak\u0131nt\u0131lara bakarak \u015farap hakk\u0131nda bir fikir y\u00fcr\u00fctmek m\u00fcmk\u00fcn m\u00fcd\u00fcr? Hi\u00e7 hata pay\u0131 olmadan bu ak\u0131nt\u0131lar\u0131n \u015farab\u0131n alkol i\u00e7erdi\u011finin kan\u0131t\u0131 oldu\u011funu s\u00f6yleyebilirsiniz. \u0130yi de, bunu zaten hepimiz biliyoruz; bacaklara veya g\u00f6zya\u015flar\u0131na ihtiyac\u0131m\u0131z yok bu sonuca varmak i\u00e7in.<\/p>\r\n\r\n\r\n\r\n

Biraz daha fikir y\u00fcr\u00fctecek olursak, damlalar\u0131n su, \u015feker ve tanen molek\u00fcllerinden meydana geldi\u011fini ve bu durumda baca\u011f\u0131n ya da g\u00f6zya\u015f\u0131n\u0131n bu \u00f6zelliklerin daha yo\u011fun oldu\u011fu (mesela k\u0131rm\u0131z\u0131 \u015farap veya tatl\u0131 \u015farap gibi) \u015faraplar\u0131 i\u015faret etti\u011fini s\u00f6yleyebiliriz. Ama bu s\u00f6ylediklerimizin bize \u015farab\u0131n iyi, k\u00f6t\u00fc, nitelikli, vs. oldu\u011fu konusunda g\u00fc\u00e7l\u00fc dayanaklar sa\u011flamad\u0131\u011f\u0131n\u0131 da unutmamak gerekir. Ak\u0131nt\u0131lar\u0131n kadehin formundan da etkilenece\u011fini ak\u0131lda tutmam\u0131zda fayda var. Ayn\u0131 \u015farab\u0131 farkl\u0131 oval a\u00e7\u0131lara sahip kadehlere koydu\u011fumuzda, ak\u0131nt\u0131lar farkl\u0131l\u0131klar g\u00f6sterir.<\/p>\r\n\r\n\r\n\r\n

S\u00f6z\u00fcn \u00f6z\u00fc, kadeh kar\u015f\u0131m\u0131za \u00e7\u0131kard\u0131\u011f\u0131 \u015farab\u0131n g\u00f6zya\u015flar\u0131yla bize \u015farab\u0131n yap\u0131sal \u00f6zellikleriyle ilgili fikir y\u00fcr\u00fctme olana\u011f\u0131 sa\u011flar, ama \u015farab\u0131n kalitesiyle ilgili bir \u015fey s\u00f6ylemez.<\/p>\r\n

Kadehin \u00e7eperinde s\u00fcz\u00fclen o Marangoni fizik kurallar\u0131, alkol-su dengelerinin duyusal analizleri ve enoloji d\u00fcnyas\u0131n\u0131n rasyonel ger\u00e7ekleri ilginizi \u00e7ekiyorsa, blogumuzdaki di\u011fer nitelikli teknik ara\u015ft\u0131rmalar\u0131m\u0131za da g\u00f6z atabilirsiniz:<\/p>\r\n