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Найденный: 10 Экземпляр 0.002 sn
Кафедра : Gıda Mühendisliği ✕Ученые : Cıldızay ÖZBEKOVA ✕
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Yrd. Doç. Dr. Cıldızay ÖZBEKOVAMühendislik Fakültesi
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COMPARATIVE STUDY OF FERMENTATION PROCESSES OF YAK AND COW MILK

Aygül USUBALİYEVA | Cıldızay ÖZBEKOVA

Yak milk is a valuable raw material for the production of functional food. Investigation of the fermentation process with commercial starter cultures is conducted to find suitable starters for producing fermented yak milk products on an industrial scale using modern rheological, microbiological, and sensorial methods. According to the acidification curve and rheological measurement, the gel-forming time of yak milk with mesophilic, thermophilic and mixed (meso-thermophilic) starter cultures was not significantly different from cow milk; but, yak milk had a significantly higher gel strength in ...Более

Статья 2023 Mühendislik Fakültesi Journal of microbiology, biotechnology and food sciences13 ( 4 ) 18 Просмотры
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Study of relations between chemical, colour and fluorescence properties of raw and dried meat powders of cow and yak (Bos grunniens)

Cıldızay ÖZBEKOVA | Asılbek KULMIRZAYEV

Gluteus medius, Longissimus thoracis, and Semitendinosus muscles from the cow and yak (Bos grunniens) reared in the Kyrgyz Republic were dried by convective (hot air) drying and freeze drying. The dried muscles were grinded into fine powders and along with raw muscles were evaluated for water activity (aW), chemical composition (moisture, fat, protein), colour characteristics (L, a, and b values), fluorescence of intrinsic fluorophores (tryptophan, vitamin A, and riboflavin). Processing of measured data tables using common components and specific weights analysis (CCSWA) showed close relations ...Более

Статья 2023 Mühendislik Fakültesi Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy306 19 Просмотры
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The process of yak milk fermentation by polycomponent starter culture

Aygül USUBALİYEVA | Cıldızay ÖZBEKOVA | Anarseyit DEYDİEV

The paper presents a comparative characteristic of the fermentation processes of yak and cow milk samples with a high fat content of 1.5 and 6 with a multicomponent starter culture, which includes Lactobacillus acidophilus, Bifidobacterium animalis subsp Lactis and Streptococcus thermophiles. Acid formation in the process of milk fermentation under the influence of the starter microflora was assessed by the dynamics of changing in titratable (Ac) and active (pH) acidity over time. The course of the formation of the structure of the resulting clot was monitored on a rheometer, fixing the viscos ...Более

Статья 2023 Mühendislik Fakültesi Online Journal of Animal and Feed Research13 ( 6 ) 12 Просмотры
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Amino Acid and Fatty Acid Profile of the Mare's Milk Produced on Suusamyr Pastures of the Kyrgyz Republic During Lactation Period

Ayçürök MACİTOVA | Asılbek KULMIRZAYEV | Cıldızay ÖZBEKOVA | Aybek BODOŞOV

The high nutritional and health-promoting properties of kymyz, a traditional drink of nomads produced from mare's milk, are well-known and reported in literature. The composition of mare's milk is significantly different from that of cow and other ruminants. Fatty acid composition and amino acid profile of mare's milk produced at Suusamyr pastures of Kyrgyzstan were studied during four lactation months (May, June, July and August). The amino acid composition was determined by precolumn derivatization with diethyl ethoxymethylenemalonate (DEEMM) in high-performance liquid chromatography (HPLC) ...Более

Доклады конференции 2015 Mühendislik Fakültesi Procedia - Social and Behavioral Sciences195 83 Просмотры
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Et ürünlerinde yaygın kullanılan katkı maddesi soya ile et arasındaki bağıntının floresans spektroskopisiyle araştırılması = Investigation Of The Relation Between Additive Commonly Used In Meat Products - Soy And Meat By Fluorescence Spectroscopy

Cıldızay ÖZBEKOVA | Asılbek KULMIRZAYEV

Bu çalışmada, et, sucuk ve çeşitli oranda soya jeli (%5, %10, %20, %40, %60, %80 ve %100) içeren kıyma örneklerinin analizinde; spektrofluorometrik yöntemle birlikte çok boyutlu kemometri teknikleri kullanılmıştır. Triptofan, riboflavin (В2 vitamini) ve A vitamin floresans emisyon spektrumları 305-400, 410-700, 340-540 nm diyapazonlarında ve uyandırma dalga boyu 290, 382 ve 322 nm seviyelerinde kaydedilmiştir. İncelenen et ve et ürünlerinin rutubet, yağ ve protein içeriği dahil olmak üzere kimyasal özellikleri tespit edilmiştir.Elde edilen bütün deneysel bilgiler; Matlab programlama dili kulla ...Более

Статья 2015 Mühendislik Fakültesi MANAS Journal of Engineering (MJEN)3 ( 1 ) 103 Просмотры
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Rheological, microbiological and sensory properties of fermented khainak milk fermented with different starter cultures

Cıldızay ÖZBEKOVA | Aygül USUBALİYEVA | Ruslan ADİL AKAY TEGİN | Anarseyit DEYDİEV

A comparison study of the fermentation process of khainak (a hybrid of yak and cattle) and cow milk with commercial yoghurt (thermophilic), quark (mesophilic and mixed) starter cultures was conducted to find suitable starters using modern rheological, microbiological, and sensory methods. Lactic acid accumulation dynamic during the fermentation process of khainak milk with yoghurt starters was faster but did not differ from cow milk. The gel strength of the fermented khainak milk (206.3-447.2 Pa) was higher than that of cow milk (40-158 Pa). The total viable bacterial counts of all samples wer ...Более

Статья 2022 Mühendislik Fakültesi International Dairy Journal134 48 Просмотры
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Investigation of fatty acid composition, thermal and rheological behavior of yak, cow and horse fats

Camilya SMANALİYEVA | Cıldızay ÖZBEKOVA | Asılbek KULMIRZAYEV

The objective of this paper was to study the fatty acid composition, and thermal and rheological behavior of Kyrgyz yak (Bos grunniens) visceral fats compared to visceral fats of cow (Bos taurus) and horse (Equus caballus). The result of the studу revealed that the content of saturated fatty acids (SFA) in yak fat was higher than those of unsaturated fatty acids (UFA) (about 58.3 and 38.0 %, respectively). The UFA content in yak fat was higher compared to cow fat (about 27.1 %) and lower than that of horse fat (about 60.0 %). The melting temperatures determined using DSC were found to be 55.18 ...Более

Статья 2019 Mühendislik Fakültesi MANAS Journal of Engineering (MJEN)7 ( 1 ) 75 Просмотры
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Fluorescence spectroscopy for accurate and rapid prediction of meat composition

Cıldızay ÖZBEKOVA | Asılbek KULMIRZAYEV

The potential of fluorescence spectroscopy was assessed to study cow, goat, sheep and yak meat. Meat samples were taken from muscles, viz. Gluteus medius (GM), Longissimus dorsi (LD) and Semitendinosus (ST). The moisture, fat and protein content of meat samples were measured. The emission fluorescence spectra of tryptophan (305-500 nm), riboflavin (410-700 nm) and vitamin A (340-540) were recorded directly on meat samples at 290, 382 and 322 nm, respectively. Principal component analysis (PCA), partial least squares regression (PLSR) and partial least squares discriminant analysis (PLSDA) were ...Более

Статья 2019 Mühendislik Fakültesi Indian Journal of Animal Sciences89 ( 7 ) 107 Просмотры
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Study of moisture content and water activity of rice using fluorescence spectroscopy and multivariate analysis

Cıldızay ÖZBEKOVA | Asılbek KULMIRZAYEV

The potential of fluorescence spectroscopy for non-destructive and rapid measurement of moisture content (MC) and water activity (a(W)) of rice was examined. A total of n 15 samples of rice produced at different locations were studied. The emission fluorescence spectra of tryptophan (305-600 nm, excitation: 290 nm) and emission fluorescence spectra of riboflavin (410-700 nm, excitation: 370 nm) were collected from milled rice. MC and a(W) of the rice samples were measured. Spectral data were subjected to principal component analysis (PCA) and partial least squares discriminant analysis (PLSDA) ...Более

Статья 2019 Mühendislik Fakültesi Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy223 81 Просмотры
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Fluorescence spectroscopy as a non destructive method to predict rheological characteristics of Tilsit cheese

Cıldızay ÖZBEKOVA | Asılbek KULMIRZAYEV

The objective of this study was to investigate the potential of fluorescence spectroscopy to predict rheological characteristics of semi-hard cheeses as yield stress (τL), flow stress (τF), storage modulus (G′) and loss modulus (G″) measured at linear-viscoelastic, yield stress and flow stress oscillation regions. Melting temperatures and chemical composition of the semi-hard cheeses were also predicted using fluorescence spectra. Principal component analysis (PCA) and partial least squares regression (PLSR) were applied to the fluorescence spectra to extract information on the rheological pro ...Более

Статья 2017 Mühendislik Fakültesi Journal of Food Engineering210 120 Просмотры
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