Studi Literatur: Aplikasi dan Fungsi Porang (Amorphophallus Oncophyllus) dalam Frozen Yoghurt

  • Novia Fadhilah Zain Fakultas Teknobiologi, Universitas Surabaya, Raya Kalirungkut, Surabaya 60293
  • Tjandra Pantjajani Fakultas Teknobiologi, Universitas Surabaya, Raya Kalirungkut, Surabaya 60293
  • Theresia Desy Askitosari Fakultas Teknobiologi, Universitas Surabaya, Raya Kalirungkut, Surabaya 60293
Abstract Views: 39 PDF Downloads: 23
Keywords: frozen yoghurt, porang, viability

Abstract

Abstract — Frozen yoghurt is a frozen desserts made with yoghurt and quite similar to ice cream but low in calorie, which cointains milk, sweetener, stabilizers, emulsifier, and lactic acid bacteria (LAB) cultures through combination of process freezing and agitation. The optimal pH about 5.5 on LAB growth and the use of different strains of LAB culture or LAB mixed cultures that can maintain the viability of LAB during processing and freezing storage of frozen yoghurt. The use of LAB mixed cultures could improve viscos ity and overrun of frozen yogurt. The viability of the LAB cultures remained above minimal limit of 107CFU/g in frozen yogurt due to the viability of LAB decrease significantly during processing and freezing storage , high viable survival rate during delivery through the gastrointestinal tract higher than 106CFU/g. The issues that often arise relates to frozen yogurt processing are a grainy texture, faster melting rate and the low viscosity and overrun value. Addition of porang flour in frozen Yogurt as stabilizer and emulsifier that has an extremely high water-holding capacity, which is able to bind water 200 times its molecular weight due to its high solubility, porang glucomannan gel formed in freezing process which can improve the quality of organoleptic having the better consistency and texture of frozen yoghurt. The use of different concentration of porang flour which can have different result in the final gel formed, have complex effects on viscosity, overrun, melting rate, pH, titratable acidity (TA), total LAB and decrease the ability proteolysis of LAB in frozen yoghurt.

Keywords: frozen yoghurt, porang, viability

 

AbstrakFrozen yoghurt merupakan jenis dari makanan penutup seperti es krim yang dibuat menggunakan yoghurt sebagai bahan utama yang terdiri dari susu, bahan pemanis, stabilisator, pengemulsi, dan kultur BAL melalui kombinasi proses pembekuan dan agitasi. pH optimal diantara 5.5 mendukung pertumbuhan BAL dengan baik dan penggunaan kultur BAL strain yang berbeda maupun kultur BAL kombinasi dalam upaya mempertahankan viabilitas BAL selama proses pembuatan dan pembekuan frozen yoghurt. Penggunaan kultur BAL kombinasi juga meningkatkan viskositas dan overrun frozen yoghurt. Persyaratan jumlah BAL minimal 107CFU/g dalam pembuatan frozen yoghurt karena adanya penurunan viabilitas BAL selama produksi berlangsung dan penyimpanan beku frozen yoghurt, serta syarat jumlah bakteri hidup yang sampai di saluran pencernaan harus lebih dari 106CFU/g. Permasalahan yang sering timbul pada proses pembuatan frozen yoghurt adalah tekstur yang tidak lembut, viskositas yang rendah, kecepatan meleleh yang cepat, dan overrun rendah. Adanya penambahan tepung porang dalam frozen yoghurt sekaligus sebagai stabilisator dan pengemulsi yang mengikat molekul air dalam jumlah besar, yakni hingga 200 kali lipat berat molekulnya karena kelarutannya yang tinggi, sehingga membentuk gel porang glukomannan pada saat pembekuan yang dapat meningkatkan mutu organoleptik dengan memiliki tekstur yang lebih baik pada frozen yoghurt. Penggunaan konsentrasi tepung porang yang berbeda, pembentukan gel yang dihasilkan juga berbeda dan terdapat pengaruh terhadap viskositas, overrun, kecepatan meleleh, pH, asam tertitrasi, total BAL dan menurunkan kemampuan proteolisis BAL pada frozen yoghurt.

Kata kunci: frozen yoghurt, porang, viabilitas

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Published
2021-08-31
How to Cite
Novia Fadhilah Zain, Tjandra Pantjajani, & Theresia Desy Askitosari. (2021). Studi Literatur: Aplikasi dan Fungsi Porang (Amorphophallus Oncophyllus) dalam Frozen Yoghurt. KELUWIH: Jurnal Sains Dan Teknologi, 2(2), 70-80. https://doi.org/10.24123/saintek.v2i2.4635