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Characteristics of yoghurt enriched with protein hydrolysate from parrotfish (Chlorurus Sordidus) head
Corresponding Author(s) : Rahmi Nurdiani
Carpathian Journal of Food Science and Technology,
Vol. 15 No. 3 (2023): Carpathian Journal of Food Science and Technology
Abstract
Production of parrotfish (Chlorurus sordidus) fillets has increased significantly in Indonesia. The processing only uses fish meat, thus producing plenty of by-products. Fish by-products contain valuable protein that can still be processed into fish protein hydrolysate (FPH). FPH can be used to improve yoghurt's physicochemical and organoleptic. This study aimed to determine the effect of protein hydrolysate from parrotfish head addition on the characteristics of yoghurt. The FPH concentrations used were 0%, 0.1%, 0.15%, 0.2%, 0.25 and 3%. This research was conducted by an experimental method using a completely randomized design with six treatments and five replications. The results showed that the variation of FPH concentration significantly affected the pH, total acid, viscosity, syneresis, water holding capacity, colour L*, a*, b*, appearance, aroma, and taste of yoghurt. However, the addition of FPH did not significantly affect the a* colour and texture of yoghurt. The best treatment was observed from the addition of 0.15% FPH with a viscosity value of 2.432 N•s/m2, syneresis 49.67%, WHC 37.4%, pH 4.36, TTA 0.76%, colour L* 74.55, colour a* - 3.76, colour b* 8.2, taste score 5.39, aroma score 5.33, texture score 5.23, and appearance score 5.8.
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- Ahmed, I.A.M., Alqah, H.A., Saleh, A., AlJuhaimi, F.Y., Babiker, E.E., Ghafoor, K., Hassan, A.B., Osman, M.A., Fickak A. (2021). Physicochemical quality attributes and antioxidant properties of set-type yoghurt fortified with argel (Solenostemma argel Hayne) leaf extract. Food Science and Technology, 137, 110389. https://doi.org/10.1016/j.lwt.2020.110389
- Anissa, D., Radiati, L.E. (2018). The effect of adding white oyster mushroom extract (Pleurotus ostreatus) on the production of yoghurt drink in terms of physical quality. Journal Animal Production of Science Technology, 13(2), 118125. https://doi.org/10.21776/ub.jitek.2018.013.02.6
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- Asare, S.N., Ijong, F.G.I., Rieuwpassa, F.J., Setiawati, N.P. (2018). Penambahan Hidrolisat Protein Ikan Lemuru (Sardinella lemuru) Pada Pembuatan Biskuit. Jurnal Ilmiah Tindalung, 4(1), 10-18.
- Bahrami, M., Ahmadi, D., Alizadeh, M., Hosseini, F. (2013). Physicochemical and sensorial properties of probiotic yoghurt as affected by additions of different types of hydrocolloid. Food Science of Animal Resources, 33(3), 363-368.
- Barkallah, M., Dammak, M., Louati, I., Hentati, F., Hadrich, B., Mechichi, T., Ayadi, M.A., Fendri, I., Attia, H., Abdelkafi, S. (2017). Effect of Spirulina platensis fortification on physicochemical, textural, antioxidant and sensory properties of yoghurt during fermentation and storage. Food Science and Technology, 84(1), 323-30.
- Batista, I., Ramos, C., Coutinho, J., Bandarra, N., Nunes, M. (2010). Characterization of protein hydrolysates and lipids obtained from black scabbardfish (Aphanopus carbo) by-products and antioxidative activity of the hydrolysates produced. Process Biochemistry, 45(1), 18–24.
- Benhabiles, M.S., Abdi, N., Drouiche, N., Lounici, H., Pauss, A., Goosen, M.F., Mameri, N. (2012). Fish protein hydrolysate production from sardine solid waste by crude pepsin enzymatic hydrolysis in a bioreactor coupled to an ultrafiltration unit. Materials Science and Engineering, 32 (4), 922-8.
- Benjakul, S., Yarnpakdee, S., Senphan, T., Halldorsdottir, S.M., Kristinsson, H.G. (2014). Fish protein hydrolysates: production bioactivities and applications. Antioxidants and functional components in aquatic foods, 237-281.
- Bernadeta, P.A. (2012). Penentuan kondisi optimum hidrolisat protein dari limbah ikan ekor kuning (Caesio cuning berdasarkan karakteristik organoleptik. Jurnal Kimia Khatulistiwa, 1(1), 26-30.
- Chalamaiah, M., Hemalatha, R., Jyothirmayi, T. (2012). Fish protein hydrolysates: proximate composition amino acid composition antioxidant activities and applications: A review. Food Chemistry, 135(4), 3020-3038.
- Chen, X., Singh, M., Bhargava, K., Ramanathan, R. (2018). Yoghurt fortification with chickpea (Cicer arietinum) flour: physicochemical and sensory effects. Journal of The American Oil Chemists Society, 95(8), 1041-1048.
- Dauksas, E., Slizyte, R., Rustad, T., Storro, I. (2008). Bitterness in fish protein hydrolysates and methods for removal. Journal of Aquatic Food Product Technology, 13(2), 101-114.
- Delikanli, B., Ozcan, T. (2017). Improving the textural properties of yoghurt fortified with milk proteins. Journal of Food Processing and Preservation, 41(5), 13101.
- Dibyanti, P., Radiati, L.E., Rosyidi, D. (2014). Effect of addition of various concentrations of culture incubation period on pH acidity levels viscosity syneresis set yoghurt. Jurnal Ilmu Ternak, 1-6.
- Dong, S., Zeng, M., Wang, D., Liu, Z., Zhao, Y., Yang, H. (2008). Antioxidant and biochemical properties of protein hydrolysates prepared from Silver carp (Hypophthalmichthys molitrix). Food Chemistry, 107(4), 1485-93.
- Estrada, J.D., Boeneke, C., Bechtel, P., Sathivel, S. (2011). Developing a strawberry yoghurt fortified with marine fish oil. Journal of Dairy Science, 94(12), 5760-9.
- Harms-Tuohy, C.A. (2021). Parrotfishes in the Caribbean: a regional review with recommendations for management. FAO Fish Aqua Circ Rome.
- Hau, E., Amiza, M., Mohd-Zin, Z., Shaharudin, N., Zainol, M. (2020). Effect of yellow stripe scad (Selaroides leptolepis) protein hydrolysate in the reduction of oil uptake in deep-fried squid. Food Research, 4, 1929-1936.
- Hau, E., Mohd-Zin, Z., Zuraidah, N., Shaharudin, N.A., Zainol, M.K. (2018). Physicochemical properties of powdered protein hydrolysate from Yellowstripe scad (Selaroides leptolepis) fish. International Food Research Journal, 25(6), 2553-2559.
- He, S., Franco, C., Zhang, W. (2013). Functions applications and production of protein hydrolysates from fish processing coproducts (FPCP). Food Research International, 50(1), 289-297.
- Hermiastuti, M. (2013). Analisis Kadar Protein dan Identifikasi Asam Amino pada Ikan Patin (Pangasius djambal). Faculty of Mathematics and Natural Sciences Universitas Jember.
- Hoyle, N.T., Merritt, J.H. (1994). Quality of fish-protein hydrolysates from herring (Clupea harengus). Journal of Food Science, 59 (1):76-79.
- Idowu, A.T., Benjakul, S., Sinthusamran, S., Sookchoo, P., Kishimura, H. (2018). Protein hydrolysate from salmon frames: Production characteristics and antioxidative activity. Journal of Food Biochemistry, 43(2), 12734.
- Jamshidi, A., Shabanpour, B., Pourashouri, P., Raeisi, M. (2019). Optimization of encapsulation of fish protein hydrolysate and fish oil in W1/O/W2 double emulsion: Evaluation of sensory quality of fortified yoghurt. Journal of Food Processing and Preservation, 43(9), 14063.
- Junianto, J., Khan, A.M., Rostini, I. (2019). Protein fortification in melarat crackers with protein hidrolyzate flour of tilapia (Oreochromis niloticus) Meat. Jurnal Pengolahan Hasil Perikanan, 22(1), 111-118.
- Kristinsson, H.G., Rasco, B.A. (2000). Biochemical and functional properties of Atlantic salmon (Salmo salar) muscle proteins hydrolyzed with various alkaline proteases. Journal of Agricultural and Food Chemistry, 48(3), 657-66.
- Kwon, H.C., Bae, H., Seo, H.G., Han, S.G. (2019). Chia seed extract enhances physiochemical and antioxidant properties of yogurt. Journal of Dairy Science, 102(6), 4870-4876.
- Lestari, S., Susilawati, P.N. (2015). Organoleptic test ofwet noodles made from beneng taro flour (Xantoshoma undipes) in an effort to increase local value added food ingredients in Banten. Prosiding Seminar Nasional Masyarakat Biodiversitas Indonesia, 1(4), 941-946.
- Lima, K.O., da Rocha, M., Alemán, A., LópezCaballero, M.E., Tovar, C.A., GómezGuillén, M.C., Montero, P., Prentice, C. (2021). Yoghurt Fortification by the Addition of Microencapsulated Stripped Weakfish (Cynoscion guatucupa) Protein Hydrolysate. Antioxidants Journal, 10(10), 1-19.
- Ma, Y. S., Zhao, H. J., Zhao, X. H. (2019). Comparison of the effects of the alcalasehydrolysates of caseinate, and of fish and bovine gelatins on the acidification and textural features of set-style skimmed yogurt-type products. Foods, 8(10), 501.
- Madora, E.P., Takalani, T.K., Mashau, M.E. (2016). Physicochemical, microbiological and sensory properties of low fat yoghurt fortified with carrot powder. International Journal of Agricultural and Biological Engineering, 9(1), 118-24.
- Marand, M. A., Amjadi, S., Marand, M. A., Roufegarinejad, L., Jafari, S. M. (2020). Fortification of yogurt with flaxseed powder and evaluation of its fatty acid profile, physicochemical, antioxidant, and sensory properties. Powder Technology, 359, 76-84.
- Murda, R.A., Maulana, S., Mangurai, S.U., Augustina, S., Bindar. Y. (2021). Wettability Properties of Heat-Treated Oil Palm Trunk Under Various Heating Times. IOP Conference Series: Earth and Environmental Science, 830(1), 012011.
- Nielsen, S.S. (2017). Food analysis laboratory manual: Standard solutions and titratable acidity, Chapter 21. Springer, 179–184.
- Nurdiani, R., Dissanayake, M., Street, W.E., Donkor, O.N., Singh, T.K., Vasiljevic, T. (2016). In vitro study of selected physiological and Physicochemical properties of fish protein hydrolysates from 4 Australian fish species. International Food Research Journal, 23 (5): 2029-2040.
- Ozturkoglu-Budak, S., Akal, C., Yetisemiyen, A. (2016). Effect of dried nut fortification on functional Physicochemical textural and microbiological properties of yoghurt. Journal of Dairy Science, 99(11), 8511-8523.
- Petrova, I., Tolstorebrov I., Eikevik, T.M. (2018). Production of fish protein hydrolysates step by step: technological aspects equipment used major energy costs and methods of their minimizing. International Aquatic Research, 10(3), 223-241.
- Prihanto, A.A., Nurdiani, R., Bagus, A.D. (2019). Production and characteristics of fish protein hydrolysate from parrotfish (Chlorurus sordidus) head. PeerJ, 7, 1-16.
- Putri, R. M. S., Hermiza, M. (2018). Uji Hedonik Biskuit Cangkang Kerang Simping (Placuna placenta) dari Perairan Indragiri Hilir. Jurnal Teknologi Pertanian, 7 (2): 11-29.
- Raikos, V., S. B. Grant, H. Hayes, and V. Ranawana. (2018). Use of β-glucan from spent 'brewer's yeast as a thickener in skimmed yogurt: Physicochemical, textural, and structural properties related to sensory perception. Journal of Dairy Science, 101(7), 5821-5831.
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- Sakul, S., Rosyidi, D., Radiati, L.E., Purwadi, P. (2020). The effect of different starter cultures on the fermentation of yoghurt added with aqueous extract of white oyster mushroom (Pleurotus ostreatus). Jurnal Ilmu Teknologi Hasil Ternak, 15(1), 46-51.
- Saputra, D., Nurhayati, T. (2016). Production of fish hydrolysates protein from waste of fish carp (Cyprinus carpio) by enzymatic hydrolysis. Comtech: Computer, Mathematics and Engineering Applications, 7(1), 11-8.
- Siddik, M.A.B., Howieson, J., Fotedar, R., Partridge, G.J. (2020). Enzymatic fish protein hydrolysates in finfish aquaculture: A review. Reviews in Aquaculture, 13(1), 406-430.
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- SNI (Standar Nasional Indonesia). (1992). Badan Standar Nasional SNI 01-2891-1992. Cara Uji Makanan dan. Minuman. Badan Standarisasi Nasional.
- Taheri, A., Anvar, S. A. A., Ahari, H. & Fogliano, V. (2013). Comparison the functional properties of protein hydrolysates from poultry by-products and rainbow trout (Onchorhynchus mykiss) viscera. Iranian Journal of Fisheries Sciences, 12(1), 154-169.
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- Thiansilakul, Y., Benjakul, S., Shahidi, F. (2007). Antioxidative activity of protein hydrolysate from round scad muscle using alcalase and flavourzyme. Journal of Food Biochemical, 31(2), 266-87.
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- Usmiati, S., Budiyanto, A., Yuliana, T. (2022). Optimizing Skim Milk Concentration and Type of Starters in The Processing of a Whey Probiotic Drink. IOP Conference Series: Earth and Environmental Science, 1024(1), 012013.
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References
Ahmed, I.A.M., Alqah, H.A., Saleh, A., AlJuhaimi, F.Y., Babiker, E.E., Ghafoor, K., Hassan, A.B., Osman, M.A., Fickak A. (2021). Physicochemical quality attributes and antioxidant properties of set-type yoghurt fortified with argel (Solenostemma argel Hayne) leaf extract. Food Science and Technology, 137, 110389. https://doi.org/10.1016/j.lwt.2020.110389
Anissa, D., Radiati, L.E. (2018). The effect of adding white oyster mushroom extract (Pleurotus ostreatus) on the production of yoghurt drink in terms of physical quality. Journal Animal Production of Science Technology, 13(2), 118125. https://doi.org/10.21776/ub.jitek.2018.013.02.6
Ariyani, F., Saleh, M., Tazwir, T., Hak, N. (2017). Optimasi Proses Produksi Hidrolisat Protein Ikan dari Mujair (Oreochromis mossambicus). Jurnal Pasca Panen dan Bioteknologi, 9(5), 11-21.
Asare, S.N., Ijong, F.G.I., Rieuwpassa, F.J., Setiawati, N.P. (2018). Penambahan Hidrolisat Protein Ikan Lemuru (Sardinella lemuru) Pada Pembuatan Biskuit. Jurnal Ilmiah Tindalung, 4(1), 10-18.
Bahrami, M., Ahmadi, D., Alizadeh, M., Hosseini, F. (2013). Physicochemical and sensorial properties of probiotic yoghurt as affected by additions of different types of hydrocolloid. Food Science of Animal Resources, 33(3), 363-368.
Barkallah, M., Dammak, M., Louati, I., Hentati, F., Hadrich, B., Mechichi, T., Ayadi, M.A., Fendri, I., Attia, H., Abdelkafi, S. (2017). Effect of Spirulina platensis fortification on physicochemical, textural, antioxidant and sensory properties of yoghurt during fermentation and storage. Food Science and Technology, 84(1), 323-30.
Batista, I., Ramos, C., Coutinho, J., Bandarra, N., Nunes, M. (2010). Characterization of protein hydrolysates and lipids obtained from black scabbardfish (Aphanopus carbo) by-products and antioxidative activity of the hydrolysates produced. Process Biochemistry, 45(1), 18–24.
Benhabiles, M.S., Abdi, N., Drouiche, N., Lounici, H., Pauss, A., Goosen, M.F., Mameri, N. (2012). Fish protein hydrolysate production from sardine solid waste by crude pepsin enzymatic hydrolysis in a bioreactor coupled to an ultrafiltration unit. Materials Science and Engineering, 32 (4), 922-8.
Benjakul, S., Yarnpakdee, S., Senphan, T., Halldorsdottir, S.M., Kristinsson, H.G. (2014). Fish protein hydrolysates: production bioactivities and applications. Antioxidants and functional components in aquatic foods, 237-281.
Bernadeta, P.A. (2012). Penentuan kondisi optimum hidrolisat protein dari limbah ikan ekor kuning (Caesio cuning berdasarkan karakteristik organoleptik. Jurnal Kimia Khatulistiwa, 1(1), 26-30.
Chalamaiah, M., Hemalatha, R., Jyothirmayi, T. (2012). Fish protein hydrolysates: proximate composition amino acid composition antioxidant activities and applications: A review. Food Chemistry, 135(4), 3020-3038.
Chen, X., Singh, M., Bhargava, K., Ramanathan, R. (2018). Yoghurt fortification with chickpea (Cicer arietinum) flour: physicochemical and sensory effects. Journal of The American Oil Chemists Society, 95(8), 1041-1048.
Dauksas, E., Slizyte, R., Rustad, T., Storro, I. (2008). Bitterness in fish protein hydrolysates and methods for removal. Journal of Aquatic Food Product Technology, 13(2), 101-114.
Delikanli, B., Ozcan, T. (2017). Improving the textural properties of yoghurt fortified with milk proteins. Journal of Food Processing and Preservation, 41(5), 13101.
Dibyanti, P., Radiati, L.E., Rosyidi, D. (2014). Effect of addition of various concentrations of culture incubation period on pH acidity levels viscosity syneresis set yoghurt. Jurnal Ilmu Ternak, 1-6.
Dong, S., Zeng, M., Wang, D., Liu, Z., Zhao, Y., Yang, H. (2008). Antioxidant and biochemical properties of protein hydrolysates prepared from Silver carp (Hypophthalmichthys molitrix). Food Chemistry, 107(4), 1485-93.
Estrada, J.D., Boeneke, C., Bechtel, P., Sathivel, S. (2011). Developing a strawberry yoghurt fortified with marine fish oil. Journal of Dairy Science, 94(12), 5760-9.
Harms-Tuohy, C.A. (2021). Parrotfishes in the Caribbean: a regional review with recommendations for management. FAO Fish Aqua Circ Rome.
Hau, E., Amiza, M., Mohd-Zin, Z., Shaharudin, N., Zainol, M. (2020). Effect of yellow stripe scad (Selaroides leptolepis) protein hydrolysate in the reduction of oil uptake in deep-fried squid. Food Research, 4, 1929-1936.
Hau, E., Mohd-Zin, Z., Zuraidah, N., Shaharudin, N.A., Zainol, M.K. (2018). Physicochemical properties of powdered protein hydrolysate from Yellowstripe scad (Selaroides leptolepis) fish. International Food Research Journal, 25(6), 2553-2559.
He, S., Franco, C., Zhang, W. (2013). Functions applications and production of protein hydrolysates from fish processing coproducts (FPCP). Food Research International, 50(1), 289-297.
Hermiastuti, M. (2013). Analisis Kadar Protein dan Identifikasi Asam Amino pada Ikan Patin (Pangasius djambal). Faculty of Mathematics and Natural Sciences Universitas Jember.
Hoyle, N.T., Merritt, J.H. (1994). Quality of fish-protein hydrolysates from herring (Clupea harengus). Journal of Food Science, 59 (1):76-79.
Idowu, A.T., Benjakul, S., Sinthusamran, S., Sookchoo, P., Kishimura, H. (2018). Protein hydrolysate from salmon frames: Production characteristics and antioxidative activity. Journal of Food Biochemistry, 43(2), 12734.
Jamshidi, A., Shabanpour, B., Pourashouri, P., Raeisi, M. (2019). Optimization of encapsulation of fish protein hydrolysate and fish oil in W1/O/W2 double emulsion: Evaluation of sensory quality of fortified yoghurt. Journal of Food Processing and Preservation, 43(9), 14063.
Junianto, J., Khan, A.M., Rostini, I. (2019). Protein fortification in melarat crackers with protein hidrolyzate flour of tilapia (Oreochromis niloticus) Meat. Jurnal Pengolahan Hasil Perikanan, 22(1), 111-118.
Kristinsson, H.G., Rasco, B.A. (2000). Biochemical and functional properties of Atlantic salmon (Salmo salar) muscle proteins hydrolyzed with various alkaline proteases. Journal of Agricultural and Food Chemistry, 48(3), 657-66.
Kwon, H.C., Bae, H., Seo, H.G., Han, S.G. (2019). Chia seed extract enhances physiochemical and antioxidant properties of yogurt. Journal of Dairy Science, 102(6), 4870-4876.
Lestari, S., Susilawati, P.N. (2015). Organoleptic test ofwet noodles made from beneng taro flour (Xantoshoma undipes) in an effort to increase local value added food ingredients in Banten. Prosiding Seminar Nasional Masyarakat Biodiversitas Indonesia, 1(4), 941-946.
Lima, K.O., da Rocha, M., Alemán, A., LópezCaballero, M.E., Tovar, C.A., GómezGuillén, M.C., Montero, P., Prentice, C. (2021). Yoghurt Fortification by the Addition of Microencapsulated Stripped Weakfish (Cynoscion guatucupa) Protein Hydrolysate. Antioxidants Journal, 10(10), 1-19.
Ma, Y. S., Zhao, H. J., Zhao, X. H. (2019). Comparison of the effects of the alcalasehydrolysates of caseinate, and of fish and bovine gelatins on the acidification and textural features of set-style skimmed yogurt-type products. Foods, 8(10), 501.
Madora, E.P., Takalani, T.K., Mashau, M.E. (2016). Physicochemical, microbiological and sensory properties of low fat yoghurt fortified with carrot powder. International Journal of Agricultural and Biological Engineering, 9(1), 118-24.
Marand, M. A., Amjadi, S., Marand, M. A., Roufegarinejad, L., Jafari, S. M. (2020). Fortification of yogurt with flaxseed powder and evaluation of its fatty acid profile, physicochemical, antioxidant, and sensory properties. Powder Technology, 359, 76-84.
Murda, R.A., Maulana, S., Mangurai, S.U., Augustina, S., Bindar. Y. (2021). Wettability Properties of Heat-Treated Oil Palm Trunk Under Various Heating Times. IOP Conference Series: Earth and Environmental Science, 830(1), 012011.
Nielsen, S.S. (2017). Food analysis laboratory manual: Standard solutions and titratable acidity, Chapter 21. Springer, 179–184.
Nurdiani, R., Dissanayake, M., Street, W.E., Donkor, O.N., Singh, T.K., Vasiljevic, T. (2016). In vitro study of selected physiological and Physicochemical properties of fish protein hydrolysates from 4 Australian fish species. International Food Research Journal, 23 (5): 2029-2040.
Ozturkoglu-Budak, S., Akal, C., Yetisemiyen, A. (2016). Effect of dried nut fortification on functional Physicochemical textural and microbiological properties of yoghurt. Journal of Dairy Science, 99(11), 8511-8523.
Petrova, I., Tolstorebrov I., Eikevik, T.M. (2018). Production of fish protein hydrolysates step by step: technological aspects equipment used major energy costs and methods of their minimizing. International Aquatic Research, 10(3), 223-241.
Prihanto, A.A., Nurdiani, R., Bagus, A.D. (2019). Production and characteristics of fish protein hydrolysate from parrotfish (Chlorurus sordidus) head. PeerJ, 7, 1-16.
Putri, R. M. S., Hermiza, M. (2018). Uji Hedonik Biskuit Cangkang Kerang Simping (Placuna placenta) dari Perairan Indragiri Hilir. Jurnal Teknologi Pertanian, 7 (2): 11-29.
Raikos, V., S. B. Grant, H. Hayes, and V. Ranawana. (2018). Use of β-glucan from spent 'brewer's yeast as a thickener in skimmed yogurt: Physicochemical, textural, and structural properties related to sensory perception. Journal of Dairy Science, 101(7), 5821-5831.
Restiani, R. (2017). Hidrolisis Secara Enzimatis Protein Bungkil Biji Nyamplung (Calophyllum inophyllum) Menggunakan Bromelain. Biota: Scientific Journal of Life Sciences, 1(3), 103-110.
Sakul, S., Rosyidi, D., Radiati, L.E., Purwadi, P. (2020). The effect of different starter cultures on the fermentation of yoghurt added with aqueous extract of white oyster mushroom (Pleurotus ostreatus). Jurnal Ilmu Teknologi Hasil Ternak, 15(1), 46-51.
Saputra, D., Nurhayati, T. (2016). Production of fish hydrolysates protein from waste of fish carp (Cyprinus carpio) by enzymatic hydrolysis. Comtech: Computer, Mathematics and Engineering Applications, 7(1), 11-8.
Siddik, M.A.B., Howieson, J., Fotedar, R., Partridge, G.J. (2020). Enzymatic fish protein hydrolysates in finfish aquaculture: A review. Reviews in Aquaculture, 13(1), 406-430.
Silovs, M. (2018). Fish processing by-products exploitation and innovative fish-based food production. Economics, 2, 210-215.
Slizyte, R., Rommi, K., Mozuraityte, R., Eck, P., Five, K., Rustad, T. (2016). Bioactivities of fish protein hydrolysates from defatted salmon backbones. Biotechnology Report, 11, 99-109.
SNI (Standar Nasional Indonesia). (1992). Badan Standar Nasional SNI 01-2891-1992. Cara Uji Makanan dan. Minuman. Badan Standarisasi Nasional.
Taheri, A., Anvar, S. A. A., Ahari, H. & Fogliano, V. (2013). Comparison the functional properties of protein hydrolysates from poultry by-products and rainbow trout (Onchorhynchus mykiss) viscera. Iranian Journal of Fisheries Sciences, 12(1), 154-169.
Tamjidi, F., Nasirpour, A. Shahedi, M. (2012). Physicochemical and sensory properties of yoghurt enriched with microencapsulated fish oil. Food Science and Technology International, 18(4), 381–390.
Thiansilakul, Y., Benjakul, S., Shahidi, F. (2007). Antioxidative activity of protein hydrolysate from round scad muscle using alcalase and flavourzyme. Journal of Food Biochemical, 31(2), 266-87.
Tridge. 2021. Parrotfish. https://www.tridge.com/intelligences/parrot-fish1/ID.
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