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Öğe Assessment of applied microwave power of intermittent microwave-dried carrot powders from colour and NIRS(Eesti Pollumajandusulikool, 2019) Keskin, M.; Soysal, Y.; Sekerli, Y.E.; Arslan, A.; Celiktas, N.Applied microwave (MW) power level is an essential factor on the quality of the dried agricultural products. Even if higher MW powers result in shorter drying times, they lead to quality degradations. It is almost impossible to know the applied MW power of a dried and powdered product by human vision. Thus, the aim of this study was to predict the applied MW power of carrot powders by using two different instruments, a chromameter and FT-NIRS. The experiments were carried out at nine different power levels (100–500 W) with three replications (N = 27). The colour and NIR reflectance was measured using a chromameter and NIRS system. The data was analysed using PLS regression. The drying time of intermittent MW drying at the highest applied power of 500 W was 1.12–5.47 times shorter than those of other lower applied powers. Applied MW power was a crucial factor on all colour parameters of the powdered carrots. Brightness (L*) decreased significantly with the increase of applied MW power resulting in darker product colours. Data analysis results showed that the NIRS system (R2 = 0.99; SEP = 16.1 W) can predict the microwave power of powdered carrots with significantly better performance than a chromameter (R2 = 0.95; SEP = 29.9 W). But, the chromamater is far more inexpensive when compared with the NIRS system and hence, it can also be used to predict the applied MW power from the colour data relatively well. Also, a mathematical model was developed to predict applied MW power from the colour parameters. © 2019, Eesti Pollumajandusulikool. All rights reserved.Öğe Effect of auxin type and concentrations in different media on the callus induction and shoot formation of crested wheatgrass (Agropyron cristatum (L.) Gaertn)(Diagnosis Press Ltd, 2008) Can, E.; Celiktas, N.; Hatipoglu, R.Effects of different medium (LS and SH).supplemented with various auxin concentrations (2, 4, 6 and 8 mg. l(-1)) of dicamba (3,6-dichloro-2metoxibenzoic acid) and picloram (4-amino-3,5,6-trichloropicolinic acid) on the callers induction, direct shoot foramtion rate and callus weight from young inflorescences crested wheatgrass (Agropyron cristatum (L.) Gaertn). The result of the study showed that callus induction rate (`%), shoot formation (%) and callus weight (mg/per Petri dishes) the young inflorescences were signficantly; affected by medium, auxin and auxin concentrations. Depending on the medium, mean callus,induction rate,.shoot formation and callus weight (mg/per Petri dishes) varied from 18% -18.8%, 8.6% - 62.5%, 11.4 - 16.4 mg, respectively Callus induction,.shoot formation rates and callers weight were also significantly influenced by the auxin ripe and auxin concentrations. The highest callus induction rate and callers weight were obtained from the LS medium containing 4 mg. P t(-1) dicamba. The highest direct shoo! formation rate was obtained from the SH medium containing 2 mg. P of picloram..Öğe Effects of genotype and concentrations of dicamba on callus induction and plant regeneration from young inflorescences of perennial ryegrass (lolium perenne l.)(2004) Can, E.; Celiktas, N.; Hatipoglu, R.; Yilmaz, S.; Avci, S.This study was carried out to determine the effects of genotypes and dicamba concentrations (2.5, 5, 7.5 and 10 mg?1) on the callus induction and plant regeneration from the segments of young inflorescences cultured on the LS-medium in perennial ryegrass (Lolium perenne L). The result of the study showed that callus induction rate, callus weight per petri dish and plant regeneration from the young inflorescences were significantly affected by the genotypes. Depending on the genotypes, callus induction rate, callus weight mg/petri dish and number of regenerates per inflorescence segment varied from 20.3 %-67.2 %, 54.4–118.1, 0.797–2.719 respectively. Callus and shoot induction rates, callus weight and regeneration rate were also significantly influenced by the dicamba concentrations. The segments cultured on the LS medium containing 5 mg?1 of dicamba gave the highest values of callus induction rate (77.1 %), shoot induction rate (66.6 %), callus weight (168.2 mg/petri dish) and regeneration rate (3.458 regenerates per segment). © 2004 Taylor and Francis Group, LLC.Öğe EFFECTS OF GENOTYPE AND PICLORAM CONCENTRATIONS ON CALLUS INDUCTION AND PLANT REGENERATION FROM IMMATURE INFLORESCENCE OF SPRING BARLEY CULTIVARS (HORDEUM VULGARE L.)(Diagnosis Press Ltd, 2008) Sener, O.; Can, E.; Arslan, M.; Celiktas, N.The effects of different picloram (4-amino-3,5,6-trichloropicolinic acid) concentrations (2.5, 5, 7.5 and 10 mg. l(-1)) in the LS (Linsmaier and Skoog, 8) medium of immature inflorescences taken from four barley (Hordeum vulgare, L.) cultivars were investigated. The result of the study showed that callus induction rate, shoot induction rate, callus weight and plain regeneration front the affected by the genotypes. There was a significant interaction between genotype and immature inflorescence were significantly of picloram concentrations. Depending on the genotypes, mean callus induction rate, mean shoot induction, mean callus weight (mg/petri dishes) and number of regenerates (per inflorescence segment) varied from 0.0-39.1%, 12.5-29.7%, 0.0-150.3 mg and 0.2-1.5 respectively. Mean callus and mean shoot induction rates, mean callus weight and mean regeneration rate were also significantly influenced by the picloram concentrations. The segments cultured on the LS medium containing 7.5 mg l(-1) of picloram gave the highest values of callus induction rate (31.3%), shoot induction rate (40.6%) and plant regeneration (1.2 regenerates per segment). In this study only albino plantlets were obtained.Öğe NEW MULTIVARIATE EMPIRICAL PREDICTION EQUATION FOR RELATIVE FEED VALUE OF NATIVE GRASSES(Aloki Applied Ecological Research And Forensic Inst Ltd, 2020) Celiktas, N.; Can, E.; Kaya, S.; Atis, I; Hatipoglu, R.; Ertekin, IRelative feed value and structural mineral differentiation of native grasses and their relationships at different plant growth stages were studied to create a more informative multivariate model to predict relative feed value. The hierarchical clustering grouped the species and their growth stages under six distinct categories with their average relative feed values of 122.6, 108.6, 99.6, 90.3, 80.9 and 71.5. The principal component analyses for the relative feed value and the mineral composition of native grasses was efficient to classify the forages with the total explained variation of 63.69% with the first two principal components. The most important predictors for relative feed value were determined as nitrogen and potassium contents of the native grasses according to beta coefficients from the partial least square regression analyses. Three partial least square regression based new empirical equations for predicting the relative feed value were constructed by using the forage nitrogen content. The coefficients of determination (R-2) and the root mean square error of prediction (RMSEP) for the equations were 0.92, 0.35, 0.81 and 2.17, 11.29, 5.88, respectively. The Fisher's F test manifested that the actual and the predicted relative feed values were not different (P>0.05) for all three equations.
