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© All Rights Reserved*Corresponding

© All Rights Reserved
*Corresponding author.
Email:
amotgan@yahoo.com
International Food Research Journal 19(1): 251-257 (2012)
1
Shahiri Tabarestani, H.,
2
Maghsoudlou, Y.,
3*
Motamedzadegan, A.,
2
Sadeghi Mahoonak, A. R. and
4
Rostamzad, H.
1
Department of Food Science and Technology, Ferdowsi University of Mashhad,
Mashhad, Iran
2
Food Engine Department, Natural Resources and Agricultural Sciences University,
Gorgan, Iran
3
Department of Food Science, Sari Agricultural Sciences and Natural Resources
University, Iran. PoBox 578
4
Fisheries Department, Natural Resources and Agricultural Sciences Universities,
Gorgan, Iran
Study on some properties of acid-soluble collagens isolated from fish
skin and bones of rainbow trout (
Onchorhynchus mykiss
)
Abstract
: To make more effective use of fish–byproduct resources, acid-soluble collagen (ASC) was isolated
from the skin and bones of rainbow trout (
Onchorhynchus mykiss
) with yields of 9.448% and 1.122% on a wet
weight basis, respectively. Based on their electrophoretic pattern, both collagens were classified as type І with
slightly different amino acid compositions and low imino acid content. From the result, both collagens were
rich in inter- and intra-molecular cross-linked components, ß and γ components with bone collagen having
more band intensity. Similar changes in viscosity of collagens from the skin and bone of rainbow trout were
observed. Collagens from the skin and bones had minimum solubility at pH 9 and 7, respectively. No changes
in solubility were observed in the presence of NaCl up to 3% (w/v). However, a sharp decrease in solubility was
found above 3% NaCl.
Keywords: Collagen, acid-soluble collagen rainbow trout,
Onchorhynchus mykiss
, fish skins, fish bones
Introduction
Collagens are generally extracellular structural
proteins involved in formation of connective tissue
structure and are known to occur in genetically distinct
forms identified as type I through XIX. They vary
considerably in their complexity and the diversity
of their structure. Also, the different types show
variations in amino acid composition and physical
properties that also seems to be correlated with the
temperature of the source animal’s environment. The
main sources of industrial collagen are limited to
those from pig and bovine skin and bones.
Due to collagen’s unique chemical features, they
have been used in various ways, such as leathers and
films, beauty aids and cosmetics, biomedical and
pharmaceutical applications, and food (Morimura
et
al
., 2002; Kittiphattanabawon
et al
., 2005). However,
the occurrence of bovine spongiform encephalopathy
(BSE), and foot/mouth disease (FMD) along with
religious constraints has resulted in an anxiety among
users of collagen and collagen-derived products from
land-based animals in recent years and thus increasing
attention has been paid to alternative collagen sources,
especially fish skin and bones which comprise about
30% of the total fish weight available after fish fillet
preparation (Shahidi, 1994
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© All Rights Reserved*Corresponding author.Email:amotgan@yahoo.comInternational Food Research Journal 19(1): 251-257 (2012)1Shahiri Tabarestani, H.,2Maghsoudlou, Y.,3*Motamedzadegan, A.,2Sadeghi Mahoonak, A. R. and4Rostamzad, H.1Department of Food Science and Technology, Ferdowsi University of Mashhad,Mashhad, Iran2Food Engine Department, Natural Resources and Agricultural Sciences University,Gorgan, Iran3Department of Food Science, Sari Agricultural Sciences and Natural ResourcesUniversity, Iran. PoBox 5784Fisheries Department, Natural Resources and Agricultural Sciences Universities,Gorgan, IranStudy on some properties of acid-soluble collagens isolated from fishskin and bones of rainbow trout (Onchorhynchus mykiss)Abstract: To make more effective use of fish–byproduct resources, acid-soluble collagen (ASC) was isolatedfrom the skin and bones of rainbow trout (Onchorhynchus mykiss) with yields of 9.448% and 1.122% on a wetweight basis, respectively. Based on their electrophoretic pattern, both collagens were classified as type І withslightly different amino acid compositions and low imino acid content. From the result, both collagens wererich in inter- and intra-molecular cross-linked components, ß and γ components with bone collagen havingmore band intensity. Similar changes in viscosity of collagens from the skin and bone of rainbow trout wereobserved. Collagens from the skin and bones had minimum solubility at pH 9 and 7, respectively. No changesin solubility were observed in the presence of NaCl up to 3% (w/v). However, a sharp decrease in solubility wasfound above 3% NaCl.Keywords: Collagen, acid-soluble collagen rainbow trout,Onchorhynchus mykiss, fish skins, fish bonesIntroductionCollagens are generally extracellular structuralproteins involved in formation of connective tissuestructure and are known to occur in genetically distinctforms identified as type I through XIX. They varyconsiderably in their complexity and the diversityof their structure. Also, the different types showvariations in amino acid composition and physicalproperties that also seems to be correlated with thetemperature of the source animal’s environment. Themain sources of industrial collagen are limited tothose from pig and bovine skin and bones.Due to collagen’s unique chemical features, theyhave been used in various ways, such as leathers andfilms, beauty aids and cosmetics, biomedical andpharmaceutical applications, and food (Morimuraetal., 2002; Kittiphattanabawonet al., 2005). However,the occurrence of bovine spongiform encephalopathy(BSE), and foot/mouth disease (FMD) along withreligious constraints has resulted in an anxiety amongusers of collagen and collagen-derived products fromland-based animals in recent years and thus increasingattention has been paid to alternative collagen sources,especially fish skin and bones which comprise about30% of the total fish weight available after fish filletpreparation (Shahidi, 1994
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© All Rights Reserved
* penulis korespondensi.
Email:
amotgan@yahoo.com
International Food Research Journal 19 (1): 251-257 (2012)
1
Shahiri Tabarestani, H.,
2
Maghsoudlou, Y.,
3 *
Motamedzadegan, A.,
2
Sadeghi Mahoonak, AR dan
4
Rostamzad, H.
1
Departemen Ilmu dan Teknologi Pangan, Ferdowsi Universitas Mashhad,
Mashhad, Iran
2
Departemen Mesin Makanan, Sumber Daya Alam dan Pertanian Sciences University,
Gorgan, Iran
3
Departemen Ilmu Pangan, Pertanian Sari Ilmu Pengetahuan dan Sumber Daya Alam
Universitas, Iran. PoBox 578
4
Departemen Perikanan, Sumber Daya Alam dan Pertanian Ilmu Universitas,
Gorgan, Iran
Studi pada beberapa sifat kolagen asam-larut diisolasi dari ikan
kulit dan tulang ikan rainbow trout (
Onchorhynchus mykiss
)
Abstrak
: Untuk membuat lebih efektif menggunakan sumber daya ikan-produk sampingan , asam-larut kolagen (ASC) diisolasi
dari kulit dan tulang ikan rainbow trout (
Onchorhynchus mykiss
) dengan hasil dari 9,448% dan 1,122% pada basah
secara berat, masing-masing. Berdasarkan pola elektroforesis, baik kolagen diklasifikasikan sebagai tipe І dengan
komposisi asam amino yang sedikit berbeda dan kandungan asam imino rendah. Dari hasil tersebut, kedua kolagen yang
kaya antar dan intra-molekul silang komponen, ß dan γ komponen dengan kolagen tulang yang memiliki
intensitas band yang lebih. Perubahan yang sama dalam viskositas kolagen dari kulit dan tulang dari rainbow trout yang
diamati. Kolagen dari kulit dan tulang memiliki kelarutan minimum pada pH 9 dan 7, masing-masing. Tidak ada perubahan
dalam kelarutan diamati di hadapan NaCl hingga 3% (w / v). Namun, penurunan tajam dalam kelarutan
ditemukan di atas 3% NaCl.
Kata kunci: Collagen, asam-larut kolagen rainbow trout,
Onchorhynchus mykiss
, kulit ikan, tulang ikan
Pengantar
Kolagen umumnya ekstraseluler struktural
protein yang terlibat dalam pembentukan jaringan ikat
struktur dan dikenal terjadi pada genetik berbeda
bentuk diidentifikasi sebagai tipe I melalui XIX. Mereka bervariasi
jauh dalam kompleksitas dan keragaman
struktur mereka. Juga, berbagai jenis menunjukkan
variasi dalam komposisi asam amino dan fisik
properti yang juga tampaknya berkorelasi dengan
suhu lingkungan sumber hewan. Para
sumber utama kolagen industri terbatas pada
orang-orang dari babi dan kulit sapi dan tulang.
Karena fitur kimia yang unik kolagen, mereka
telah digunakan dalam berbagai cara, seperti kulit dan
film, bantu kecantikan dan kosmetik, biomedis dan
aplikasi farmasi, dan makanan (Morimura
et
al
., 2002; Kittiphattanabawon
et al
, 2005.). Namun,
terjadinya bovine spongiform encephalopathy
(BSE), dan kaki / penyakit mulut (PMK) bersama dengan
kendala agama telah mengakibatkan kecemasan di kalangan
pengguna kolagen dan produk kolagen yang berasal dari
hewan darat dalam beberapa tahun terakhir dan dengan demikian meningkatkan
perhatian telah dibayarkan kepada sumber-sumber alternatif kolagen,
kulit terutama ikan dan tulang yang terdiri dari sekitar
30% dari total berat ikan yang tersedia setelah fillet ikan
persiapan (Shahidi, 1994
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