Browsing by Author "Karakus, K."

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Appropriate Growth Model Describing Some Testicular Characteristics in Norduz Male Lambs
(Pakistan Agricultural Scientists Forum, 2010) Karakus, K.; Eyduran, E.; Aygun, T.; Javed, K.
The objective of this study was to determine the appropriate non-linear function describing growth of some testicular traits (testicular length, testicular diameter, scrotal circumference and scrotal length) in Norduz male lambs. Testicular characteristics at 90, 110, 130, 150, 170, and 190 days of age for all the lambs were measured. Four growth (Monomolecular, Logistic, Gompertz, and Richard's) models were used to explain relationship between each testicular trait-age. Growth models were based on averages of measurements on their testicular traits in each period of all the male lambs. As a result, appropriate growth models explaining growth at early age of testicular length, testicular diameter, scrotal circumference and scrotal length in Norduz male lambs were Logistic and Richard's non-linear model. Also, age and body weight had significant effect on these testicular traits.
Factors Affecting the Growth of Norduz Lambs
(2009) Karakus, K.; Eyduran, E.; Aygun, T.; Cengiz, F.
From the study, it was found that the effects of gender and birth type on birth weight, weights at 30, 60, 90,120,150 and 180th days of age were significant, whereas dam's age had no effect on weights at all periods. Also, the linear regressions of weights at all periods on birth weight were found significant. On conclusion it is stated that sex and birth type had significant effect on weights at all periods, whereas effect of dam age on weights at all periods was found non-significant.
Fleece Characteristics of Karakas, Norduz, Ile De France X Akkaraman Cross Bred Sheep
(indian veterinary Journal, 2007) Karakus, K.; Aygun, T.; Arslan, S.
Most of the native sheep breeds in Turkey have low meat and wool yields. The fat tailed Karakas and Norduz sheep, subtype of the Akkaraman sheep breed, are favourably characterized by their adaptation to harsh environmental and feeding conditions. Karakas and Norduz sheep are found in Van provinces of Eastern Anatolia in Turkey. This study was aimed to compare some fleece characteristics of Karakas, Norduz, Ile de France x Akkaraman (G) and Ile de France x Akkaraman (G) x Karakas (F-1) sheep and to investigate the wool characteristics of Ile de France crosses with native sheep for utilization possibilities in traditional products (hand-made carpet and kilim).
New Approaches To Determination of the Best Nonlinear Function Describing Growth at Early Phases of Kivircik and Morkaraman Breeds
(Medwell online, 2008) Eyduran, E.; Kuecuek, M.; Karakus, K.; Ozdemir, T.
The present study was to determine the most suitable nonlinear growth model explaining growth at early stage of lambs of Morkaraman and Kivircik breeds from birth to 180th days of age. For this aim, Monomolecular, Gompertz, Logistic with 3 parameter, Richards, logistic with 4 parameter growth models were used for explaining the body weight-time relationship on 4 breed-sex groups; namely, Morkaraman-Male, Morkaraman-Female, Kivircik-Male and Kivircik-Female. These growth models were fitted to weight-age data on basis of averages of all groups at each period. Body weights of these lambs were recorded fortnightly from birth to 180th days of age. Criteria such as R(2) and Root Mean Square Error (RMSE) and Asymptotic Correlation Coefficients (ACC) between growth parameters in all models were used to determine the best growth model explaining growth at early stage of weight-age of these lambs, Apart from these criteria, we developed two new approaches derived from Asymptotic Correlation Coefficients (ACC), namely, Absolute Reduction Ratio (%) (ARR) and Absolute Reduction Ratio for Cut-off value (%) (ARRC). It was concluded that the most appropriate growth model explaining body weight-time relationship at early phase of four groups was found to be Gompertz growth model and new approaches gave more effective results about testing effectiveness of growth models.
An Overview of Food Safety and Covid-19 Infection: Nanotechnology and Cold Plasma Applications, Immune-Boosting Suggestions, Hygienic Precautions
(Elsevier, 2021) Ceylan, Z.; Ocak, E.; Uçar, Y.; Karakus, K.; Cetinkaya, T.
Avian influenzas, Ebola, Nipah, Middle East respiratory syndrome coronavirus (MERS-CoV), and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is an RNA virus covered by a lipid bilayer, are directly affecting people worldwide. On the other hand, in addition to the main spread source (human contact) of SARS-CoV-2, consumers have started to think about whether foods are dangerous in terms of SARS-CoV-2 spread. The consumption of wild animals as well as the possible contamination of SARS-CoV-2 in fresh and frozen foods have caused concern and increased awareness among consumers. A heating process >70°C is being suggested to eliminate viral contamination risk. Cutting tools, slicing machines, and food-contact surfaces including stainless steel, aluminum, or glass must be regularly sanitized. The sous vide cooking method, which is based on cooking under vacuum and with pH treatments in the range of 3 and 10, could be advised in this risky period for decreasing contamination risk in food. Also, recent studies have shown that nanotechnology applications such as nanoparticles could be used to combat the SARS-CoV-2 spread, which is 50-200nm in size. Another suggested technique is cold plasma technology that could damage the protein structure of the virus. Besides these techniques, it is important to boost the immune system. In this regard, recent researches have revealed the importance of honey consumption (1g/kg per person/day), intake of vitamins, minerals like selenium, and ω-3 fatty acids. © 2021 Elsevier Inc. All rights reserved.
Some Factors Influencing the Birth Weights of Norduz Kids
(Scientific Issues Natl Centre Agrarian Sciences, 2010) Karakus, K.; Aygun, T.; Budag, C.; Eyduran, E.; Ozdemir, T.
The present paper was conducted to determine the effects of some environmental factors on Norduz kids raised at Research and Application Farm of Agricultural Faculty, Yuzuncu Yil University, Van, Turkey. For this aim, birth type (single and twin), gender (male and female), dam age at lambing (1, 2, 3, 4, 5, and 6), and birth year (2005, 2006, and 2007), and birth weights (kg) of 155 Norduz kids were recorded. According to results of the present paper, effect of gender factor on birth weight of kids was found to be non-significant, the influences of dam age (P<0.05), birth type (P<0.05), and birth year (P<0.001) on it were found significant. As a result, the birth weight trait provides useful information for early selection criteria in breeding program. Determination and adjustment of the effects of environmental factors influencing it are very important for achieving more accurate genetic parameters and effective application of breeding and selection methods on the trait.
Usage of Factor Scores for Determining Relationships Among Body Weight and Some Body Measurements
(Scientific Issues Natl Centre Agrarian Sciences, 2009) Eyduran, E.; Karakus, K.; Karakus, S.; Cengiz, F.
The aim of this study is to estimate weaning weight (WW) using six body measurements (withers height (WH), body length (BL), chest circumference (CC), leg circumference (LC), body depth (BD), and width of chest behind shoulders (WCS)) measured at weaning period by factor scores in multiple regression model. For this aim, a total of 94 Norduz lambs were used. "Kaiser-Meyer-Olkin (KMO) measure of sampling adequacy" and Bartlett's test of sphericity were used to determine whether factor analysis was suitable for data studied. According to results of these criteria, the data was found to be most appropriate for applying factor analysis. Three factors whose eigenvalues greater than 1 were selected as independent variables for multiple regression analysis. It was concluded that that three factors had significant-positive effects on weaning weight and all three factors explained approximately 80% of variation in weaning weight.