{"id":9390,"date":"2024-08-23T13:31:56","date_gmt":"2024-08-23T13:31:56","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=9390"},"modified":"2024-08-23T13:31:56","modified_gmt":"2024-08-23T13:31:56","slug":"the-merad-reaction","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/tr\/the-merad-reaction\/","title":{"rendered":"Merad reaksiyonunu etkileyen fakt\u00f6rler nelerdir?"},"content":{"rendered":"

M\u00fckemmel tat, aroma ve lezzete sahip tuzlu aromalar haz\u0131rlamak i\u00e7in melad reaksiyonunu daha iyi kullanmak amac\u0131yla yazarlar [1] melad reaksiyonunu etkileyen ana fakt\u00f6rleri \u00f6zetlemi\u015flerdir.<\/p>\n

Melad reaksiyonunu etkileyen \u00e7e\u015fitli fakt\u00f6rler vard\u0131r ve bunlar melad reaksiyonunun s\u00fcrecini ve etkisini etkilemek i\u00e7in birlikte \u00e7al\u0131\u015f\u0131rlar. Bu reaksiyon ko\u015fullar\u0131n\u0131 kontrol ederek, aromay\u0131 ve kalitesini daha da iyile\u015ftirmek i\u00e7in reaksiyon istenen y\u00f6nde ger\u00e7ekle\u015ftirilebilir.<\/p>\n

\u00c7evresel fakt\u00f6rler<\/strong><\/p>\n

1. Reaksiyon s\u00fcresi<\/strong><\/p>\n

Reaksiyon s\u00fcresi ne kadar uzun olursa, o kadar fazla aroma ara \u00fcr\u00fcn\u00fc \u00fcretilir, lezzet o kadar kal\u0131n ve zengin olur, ancak a\u015f\u0131r\u0131 karamelizasyon reaksiyonu ve ac\u0131 tat \u00fcretmek ve hatta baz\u0131 olumsuz maddeler ve kanserojenler \u00fcretmek kolayd\u0131r; reaksiyon s\u00fcresi \u00e7ok k\u0131sad\u0131r, yeterli lezzet ve renk olu\u015fturamaz.<\/p>\n

2. Reaksiyon s\u0131cakl\u0131\u011f\u0131<\/strong><\/p>\n

Karbon ve amonyak reaksiyonu 20-25 \u2103'de, 30 \u2103'den daha h\u0131zl\u0131, 80 \u2103'den daha b\u00fcy\u00fck ger\u00e7ekle\u015febilir, reaksiyon h\u0131z\u0131 s\u0131cakl\u0131k ve oksijenden daha az etkilenir. Ayn\u0131 ko\u015fullar alt\u0131nda, \u0131s\u0131tma s\u00fcresi ne kadar uzun olursa, reaksiyon rengi o kadar koyu olur. Ortalama olarak, her 10 \u2103 art\u0131\u015f i\u00e7in, reaksiyon h\u0131z\u0131 fark\u0131 3-5 katt\u0131r. Bununla birlikte, s\u0131cakl\u0131k \u00e7ok y\u00fcksekse, g\u0131dadaki besinler zarar g\u00f6r\u00fcr ve baz\u0131 yer f\u0131st\u0131\u011f\u0131 kokla\u015fmas\u0131 ve ya\u011f kokla\u015fmas\u0131 toksik ve zararl\u0131 maddeler de \u00fcretilebilir. S\u0131cakl\u0131k ayr\u0131ca reaktanlar\u0131n aktivitesini ve e\u011firme \u00f6zelliklerini de etkiler.<\/p>\n

3. pH<\/strong><\/p>\n

pH'\u0131n Melad reaksiyonu \u00fczerindeki etkisi s\u0131cakl\u0131k ve zamandan daha fazlad\u0131r. Ba\u015flang\u0131\u00e7 pH'\u0131 3'ten b\u00fcy\u00fck oldu\u011funda, reaksiyon h\u0131z\u0131 pH'\u0131n artmas\u0131yla h\u0131zlan\u0131r. pH \uff1c 7.0, reaksiyon belirgin de\u011fildir; pH \uff1e 7.0, reaksiyon h\u0131z\u0131 a\u00e7\u0131k\u00e7a h\u0131zlan\u0131r; pH \uff1e 11.0, reaksiyon renk de\u011fi\u015fimi a\u00e7\u0131k\u00e7a zay\u0131flar. Ayr\u0131ca, zay\u0131f alkali veya n\u00f6tr ko\u015fullar alt\u0131nda daha iyi karamel aromas\u0131 ve kavrulmu\u015f aroma elde edilebilece\u011fi bulunmu\u015ftur [2].<\/p>\n

4. Nem aktivitesi<\/strong><\/p>\n

Su aktivitesi 0.3-0.7 aral\u0131\u011f\u0131nda oldu\u011funda meladik reaksiyon daha h\u0131zl\u0131d\u0131r. Bu aral\u0131\u011f\u0131n alt\u0131nda veya \u00fcst\u00fcnde reaksiyon nispeten yava\u015ft\u0131r. Su yoklu\u011funda reaksiyon neredeyse hi\u00e7 ger\u00e7ekle\u015fmez.<\/p>\n

5. Reaksiyon bas\u0131nc\u0131<\/strong><\/p>\n

Reaksiyon sistemindeki reaksiyon bas\u0131nc\u0131 ve pH birlikte Melad reaksiyonunu etkiler. Atmosferik bas\u0131n\u00e7ta, reaksiyon pH=6.5'te daha h\u0131zl\u0131d\u0131r ve pH=8 ve 10.1'de, reaksiyon 6000 MPa'l\u0131k y\u00fcksek bas\u0131n\u00e7larda daha h\u0131zl\u0131d\u0131r [3].<\/p>\n

Reaktifler<\/strong><\/p>\n

1. \u015eekerler<\/strong><\/p>\n

Hem \u015fekerin yap\u0131s\u0131 hem de t\u00fcr\u00fc, genel olarak reaksiyon h\u0131z\u0131n\u0131 do\u011frudan etkileyebilir: pentoz > hekzanaloz > hekzoketoz > disakkarit [4]; a\u00e7\u0131k siklik riboz > siklik riboz; galaktoz > fruktoz [5]; D-alloz > D-glukoz [6]. \u0130ndirgeyici monosakkaritler aras\u0131nda, be\u015f karbonlu \u015fekerlerin reaksiyon h\u0131z\u0131: riboz > arabinoz > ksiloz; alt\u0131 karbonlu \u015fekerler: galaktoz > mannoz > glukoz. \u0130ndirgeyici disakkaritler artan molek\u00fcl a\u011f\u0131rl\u0131\u011f\u0131 ile daha yava\u015f reaksiyon h\u0131z\u0131na sahiptir.<\/p>\n

2. Amino asit<\/strong><\/p>\n

Amino asitler reaksiyon h\u0131z\u0131n\u0131 ve ortaya \u00e7\u0131kan aroma maddelerini etkileyebilir. Reaksiyon h\u0131z\u0131: \u03b5-pozisyonundaki amino asit veya terminal pozisyon\uff1e\u03b1-pozisyonu, bazik amino asit\uff1easidik amino asit[7]; ayn\u0131 \u015feker ve farkl\u0131 amino asit reaksiyonu farkl\u0131 lezzet \u00fcretecektir.<\/p>\n

3. Reaktanlar\u0131n konsantrasyonu<\/strong><\/p>\n

Genel olarak reaktan konsantrasyonunun artmas\u0131 reaksiyon h\u0131z\u0131n\u0131 art\u0131r\u0131r, ancak Melad reaksiyonu karbonil amonyak aras\u0131ndaki bir reaksiyon oldu\u011fu i\u00e7in, reaksiyon s\u00fcreci ve h\u0131z\u0131 ile reaktanlar aras\u0131ndaki karbonil ve amino gruplar\u0131n\u0131n oran\u0131 aras\u0131nda \u00f6nemli bir ba\u011flant\u0131 vard\u0131r.<\/p>\n

Di\u011ferleri<\/strong><\/p>\n

1. S\u00fclfit<\/strong><\/p>\n

S\u00fclfitler, muhtemelen s\u00fclfitlerin karbonil gruplar\u0131yla birle\u015ferek bile\u015fikler olu\u015fturmas\u0131 ve ard\u0131ndan amino bile\u015fikleriyle yo\u011funla\u015fmas\u0131 veya s\u00fclfitlerin ara \u00fcr\u00fcnlerdeki karbonil gruplar\u0131yla reaksiyona girebilmesi nedeniyle reaksiyon s\u00fcrecini belirli bir \u00f6l\u00e7\u00fcde engelleyebilir.<\/p>\n

2. Metal iyonlar\u0131<\/strong><\/p>\n

Metal iyonlar\u0131 da reaksiyonun h\u0131z\u0131n\u0131 ve s\u00fcrecini etkileyebilir. Bak\u0131r iyonlar\u0131 ve demir iyonlar\u0131 Melad reaksiyonunu te\u015fvik edebilir, ancak \u00fc\u00e7 de\u011ferlikli demir iyonlar\u0131 iki de\u011ferlikli demir iyonlar\u0131ndan daha g\u00fc\u00e7l\u00fc bir katalitik yetene\u011fe sahiptir. Magnezyum ve kalsiyum iyonlar\u0131 reaksiyonu engelleyebilir.<\/p>\n

3. I\u015f\u0131nlama<\/strong><\/p>\n

I\u015f\u0131nlama Melad reaksiyonunun h\u0131z\u0131n\u0131 etkiler. \u015eekerlerin \u0131\u015f\u0131nlama ve \u0131s\u0131tma alt\u0131ndaki reaksiyon h\u0131z\u0131 farkl\u0131d\u0131r. I\u015f\u0131nlama alt\u0131nda \u015fekerin reaksiyon h\u0131z\u0131: sukroz > fruktoz > glukoz; \u0131s\u0131tma ko\u015fulu alt\u0131nda reaksiyon h\u0131z\u0131: pentoz > heptoz > heksoz > disakkarit \u015feklindedir.<\/p>\n

4. Tampon<\/strong><\/p>\n

\u00d6rne\u011fin, fosfat ve sitrat tampon \u00e7\u00f6zeltisi [8].<\/p>\n

5. Lipidler<\/strong><\/p>\n

\u00d6rne\u011fin, fosfolipidler gibi lipidlerin aroma \u00fcretimi \u00fczerinde olumlu bir etkisi vard\u0131r.<\/p>","protected":false},"excerpt":{"rendered":"

In order to better utilize the melad reaction to prepare savory flavors with excellent taste, aroma and flavor, the authors [1] summarized the main factors affecting the melad reaction. There are various factors affecting the melad reaction, and they work together to influence the process and effect of the melad reaction. 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