{"id":8634,"date":"2025-05-16T06:18:12","date_gmt":"2025-05-16T06:18:12","guid":{"rendered":"https:\/\/changhongchemical.com\/?p=8634"},"modified":"2026-04-27T11:16:00","modified_gmt":"2026-04-27T11:16:00","slug":"mechanism-of-action-of-food-antioxidants","status":"publish","type":"post","link":"https:\/\/changhongchemical.com\/id\/mechanism-of-action-of-food-antioxidants\/","title":{"rendered":"Mekanisme kerja antioksidan makanan"},"content":{"rendered":"<p>Karena banyaknya jenis antioksidan, mekanisme kerja antioksidan tidak sama, secara ringkas, ada beberapa hal berikut ini:<br \/>\n1. adalah mengurangi kandungan oksigen dalam sistem makanan melalui efek pengurangan antioksidan;<br \/>\n2. adalah untuk menghentikan reaksi berantai dalam proses oksidasi dan mencegah proses oksidasi berlanjut lebih jauh;<br \/>\n3. adalah menghancurkan dan melemahkan aktivitas enzim oksidatif, sehingga tidak dapat mengkatalisis reaksi oksidasi;<br \/>\n4. mampu mengkatalisis dan menyebabkan reaksi oksidasi bahan tertutup, seperti kompleksasi yang dapat mengkatalisis reaksi oksidasi ion logam. Berikut ini adalah pengantar singkat tentang mekanisme antioksidan dengan contoh ketengikan oksidatif otomatis pada lemak dan minyak serta pencoklatan oksidatif enzimatik pada bahan makanan.<br \/>\nPenghambatan oksidasi minyak dan lemak oleh antioksidan<br \/>\nKetika minyak dan lemak alami terpapar udara, mereka akan secara spontan mengalami reaksi oksidasi, menghasilkan asam lemak tingkat rendah, aldehida, keton, dll., yang menghasilkan bau asam yang tidak sedap dan penurunan rasa, yang merupakan alasan utama kerusakan minyak dan lemak serta makanan yang mengandung minyak. Oksidasi otomatis lemak dan minyak mengikuti mekanisme reaksi radikal bebas (juga dikenal sebagai radikal bebas). Pertama, molekul lemak (dinyatakan sebagai RH) diaktifkan oleh panas, cahaya atau ion logam dan inisiator radikal bebas lainnya, dan kemudian terurai menjadi radikal bebas R- dan H- yang tidak stabil.<br \/>\nKetika molekul oksigen hadir, radikal bebas bereaksi dengan oksigen untuk membentuk radikal peroksida, dan radikal peroksida ini bereaksi dengan molekul lemak untuk membentuk hidroperoksida dan radikal R-, yang kemudian diteruskan melalui reaksi berantai radikal R- hingga kombinasi radikal bebas dan radikal bebas atau radikal bebas dan penangkal radikal bebas (dilambangkan dengan x) menghasilkan senyawa yang stabil, dan reaksi berakhir.<br \/>\nProses ini menghasilkan banyak senyawa karbonil rantai pendek seperti aldehida, keton, dan asam karboksilat, yang merupakan zat utama yang menghasilkan rasa tengik dan rasa yang tidak enak, dan adanya sejumlah besar peroksida, yang juga dapat memberikan hasil yang merugikan bagi tubuh manusia.<br \/>\nMekanisme kerja antioksidan yang paling penting adalah menghentikan transmisi reaksi berantai, polanya adalah sebagai berikut (dengan AH untuk antioksidan): antioksidan radikal A- tidak aktif, yang tidak dapat menyebabkan reaksi berantai, tetapi dapat berpartisipasi dalam beberapa reaksi penghentian. Sebagai contoh: A- A-\u2192AA A- ROO-\u2192ROOA_.<br \/>\nOleoresin antioxidants mainly include butylhydroxyanisole (BHA), dibutylhydroxytoluene (BHT), propyl gallate (PG), tert-butylhydroquinone (<a href=\"https:\/\/changhongchemical.com\/product\/chlumiao-tbhq-cas-1948-33-0\/\">TBHQ<\/a>), tocopherol (vitamin E), etc. They all belong to phenolic antioxidants, which are more stable after the formation of free radicals, and the reason for this can be explained as follows: the unpaired singlet electrons on the oxygen atoms can act with the \u03c0-electron cloud on the benzene ring, which occurs a Conjugation effect. The result of this conjugation is that the paired electrons are not fixed on the oxygen atom, but are partially distributed to the benzene ring. In this way, the energy of the free radicals is reduced and no longer triggers a chain reaction, providing an antioxidant effect.<br \/>\nPenghambatan pencoklatan oksidatif enzimatik pada makanan<br \/>\nPencoklatan oksidatif enzimatik adalah suatu kelas reaksi di mana oksidase fenol dalam makanan mengkatalisis oksidasi zat fenolik untuk membentuk kuinon dan polimernya. Karena reaksi ini menghasilkan zat seperti melanin, warna makanan menjadi lebih pekat, sehingga memengaruhi penampilan dan kualitas makanan.<br \/>\nPencoklatan oksidatif enzimatik memerlukan tiga kondisi: fenol oksidase, oksigen, dan zat fenolik yang sesuai. Oleh karena itu, penghambatan pencoklatan enzimatik pada makanan dapat dipertimbangkan dari ketiga kondisi ini. Karena tidak mungkin menghilangkan zat fenolik dari makanan, tindakan utama yang dapat digunakan adalah menghancurkan dan menghambat aktivitas fenol oksidase dan menghilangkan oksigen. Penambahan antioksidan dalam jumlah yang tepat pada bahan makanan \uff0cDengan mengkonsumsi oksigen dalam sistem makanan melalui reduksi, ini berfungsi untuk mencegah pencoklatan oksidatif enzimatik pada makanan.<\/p>\n<h1><strong><b>Hubungi Kami Sekarang!<\/b><\/strong><\/h1>\n<h4><strong><b>Jika Anda membutuhkan Harga, silakan isi informasi kontak Anda di formulir di bawah ini, kami biasanya akan menghubungi Anda dalam waktu 24 jam. Anda juga bisa mengirim email kepada saya\u00a0<span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" href=\"mailto:info@changhongchemical.com\">info@changhongchemical.com<\/a><\/span>\u00a0selama jam kerja (8:30 pagi hingga 6:00 sore UTC+8 Senin-Sabtu) atau gunakan obrolan langsung situs web untuk mendapatkan balasan secepatnya.<\/b><\/strong><\/h4>","protected":false},"excerpt":{"rendered":"<p>Due to the more types of antioxidants, antioxidant action mechanism is not the same, in summary, there are mainly the following: 1. is to reduce the oxygen content in the food system through the&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152],"tags":[],"class_list":["post-8634","post","type-post","status-publish","format-standard","hentry","category-antioxidant"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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