Yazar "Karasakal, Ayça" için listeleme
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Antioxidant, antimicrobial activities and total flavonoid contents of Cirsium bulgaricum DC. leaf extracts
Karasakal, Ayça; Demirci, Ahmet Şükrü; Demirok, Nazan Tokatlı; Cabi, Evren (Marmara Univ, Fac Pharmacy, 2015)In this study, the antioxidant activities of methanol and acetone extracts of Cirsium bulgaricum DC. (Asteraceae) were evaluated by five antioxidant assays, including phosphomolybdate method, cupric ion reducing capacity ... -
Determination of antioxidant activities, total phenolic, flavonoid, anthocyanin, ? carotene and lycopene contents, essential and toxic elements in commercial cornelian cherry marmalades
Karasakal, Ayça (International Congress of Chemistry and Environment, 2015)Cornelian cherry fruit have taken great attention for their health benefits in the last years. The purpose of this study is to analyse the antioxidant activities, total phenolic, flavonoid, anthocyanin ?-carotene and ... -
Determination of Arsenic in Helianthus Annuus L. By Hydride Generation Atomic Absorption Spectrometry
Gulay, S.; Karasakal, Ayça; Yıldız, K. (Global Network Environmental Science & Technology, 2015)This study represents new research on the sunflower (Helianthus annuus L.) including new data on arsenic contents in Ergene River Basin. In this study, the concentrations of arsenic in soil and sunflower plant have been ... -
Determination of Ascorbic Acid in Common Fruits, Herbal Tea by Using Cuprac and Cerac Methods
Karasakal, Ayça; Gürkan, Yelda Yalçın (Asian Journal Of Chemistry, 2012)The method used to determine the ascorbic acid (Vitamin C) is based on the oxidation of ascorbic acid to dehlydroascorbic acid with the cupric ion reducing antioxidant capacity (CUPRAC) and ceric-reducing antioxidant ... -
Determination of Major, Minor, and Toxic Elements in Tropical Fruits by ICP-OES After Different Microwave Acid Digestion Methods
Karasakal, Ayça (Springer, 2021)Fruits contain nutrients, minerals, trace elements, vitamins, and phytochemicals that are important in terms of human health. When fruits are consumed in a balanced diet, they have a positive effect with regard to reducing ... -
Determination of total antioxidant capacity and total phenolic compounds of Helianthus annuus L. growing in Turkey
Karasakal, Ayça (Dr Jyoti Garg, 2013)L- Ascorbic acid (AA: vitamin C) is the most important vitamin for human nutrition supplied by fruits and vegetables and is the main water-soluble antioxidant in human plasma. AA is reversibly oxidized to form dehydroascorbic ... -
Determination of Total Antioxidant Capacity of Rosehip (R. arvensis Huds) Growing in Turkey and Rosehip Species by Using CUPRAC Spectrophotometric Method
Karasakal, Ayça; Gürkan, Yelda Yalçın (Asian Journal Of Chemistry, 2013)L-Ascorbic acid (vitamin C) is the most important vitamin for human nutrition supplied by fruits and vegetables, and is the main water-soluble antioxidant in human plasma. L-Ascorbic acid is reversibly oxidized to form ... -
Determination of total selenium in Helianthus Annuus L. in Turkey during 2 years by Graphite Furnace Atomic Absorption Spectrometry (GFAAS)
Karasakal, Ayça; Seren, Gamze Yıldız; Kalebasi, Y. (International Congress of Chemistry and Environment, 2014)The purpose of this study was to estimate total selenium concentration in Helianthus Annuus L. collected from different regions in Turkey by graphite furnace atomic absorption spectrometry (GFAAS), prior to microwave ... -
Determination of Trace and Major Elements in Vegan Milk and Oils by ICP-OES After Microwave Digestion
Karasakal, Ayça (Humana Press Inc, 2020)Increasing technological developments also bring about environmental pollution. Heavy metals and metallic compounds, as a result of soil, water, and air industrialization, pass through to people and animals through the ... -
Determination of vitamin e (alpha-tocopherol) in canola oils by high performance liquid chromatography
Karasakal, Ayça; Seren, Gamze Yıldız (Georg Thieme Verlag Kg, 2011)[No Abstract Available] -
Determination of Vitamin E in Canola Seeds by High Performance Liquid Chromatography
Karasakal, Ayça; Gürkan, Yelda Yalçın (Asian Journal Of Chemistry, 2012)Tocopherols (vitamin E) are natural phenolic antioxidants present in vegetable oils and are responsible for many healthful properties of these foods. They are effective radical scavengers and defend the body against free ... -
Development and validation of a sensitive spectrofluorimetric method for the determination of amoxapine in human plasma and urine
Karasakal, Ayça; Ulu, Sevgi Tatar (Wiley-Blackwell, 2014)A selective and sensitive spectrofluorimetric method was developed and validated for the determination of amoxapine in human plasma and urine. The developed method is based on labeling with 5-dimethylaminonaphthalene-1-sulfonyl ... -
Development and validation of a sensitive spectrofluorimetric method for the determination of cilazapril of human plasma, urine, in pure and pharmaceutical preparations
Karasakal, Ayça (Maik Nauka/Interperiodica/Springer, 2015)A selective and sensitive spectrofluorimetric method was developed and validated for the determination of cilazapril in human plasma urine, in pure and pharmaceutical preparations. The proposed method is based on derivatization ... -
Development and validation of first and zero order derivative spectrophotometric methods for the determination of rilmenidine in pharmaceutical preparations and forced degradation study
Karasakal, Ayça; Özdemir, Elif (Marmara Univ, 2019)Zero and first order derivative spectrophotometric methods were developed for the analysis of rilmenidine in pharmaceutical preparations. Absorbances of rilmenidine were measured at 224 rim for the zero order by measuring ... -
Electrochemical Characteristics of a Novel Pyridinium Salt as a Candidate Drug Molecule and Its Interaction with DNA
Topkaya, Seda Nur; Karasakal, Ayça; Çetin, Arif E.; Parlar, Sülünay; Alptüzün, Vildan (Wiley-V C H Verlag Gmbh, 2020)In this article, for the first time, the electrochemical properties of a novel pyridine derivative, 4-(2-(2-hydroxybenzylidene) hydrazinyl)-1-(3-phenylpropyl) pyridinium bromide (abbreviated as 4-Pyri), and its interaction ... -
Evaluation of Antioxidant activities of Brassica napus's seeds by CUPRAC, ABTS/Persulphate and DMPD methods
Karasakal, Ayça (Marmara Univ, Fac Pharmacy, 2015)The antioxidant activities of the extracts prepared from Brassica napus's seeds (canola seeds) was determined in this study. Brassica napus's seeds were collected from eight different regions of Turkey. Extraction experiments ... -
First order derivative spectrophotometric method for the determination of benidipine hydrochloride pharmaceutical preparations and forced degradation study
Karasakal, Ayça (Pleiades Publishing Inc, 2015)A simple and rapid first order derivative spectrophotometric method was developed for the determination of benidipine hydrochloride in pure form and pharmaceutical preparations. For the first derivative spectrophotometric ... -
Forced Degradation Studies of Nateglinide by the First-Order Derivative Spectrophotometric Method and the Density Functional Theory of the Nateglinide Molecule
Karasakal, Ayça; Gürkan, Yelda Yalçın (Springer, 2022)Nateglinide (NAT) is an oral antihyperglycemic agent used for the treatment of noninsulin-dependent diabetes mellitus. We evaluated the NAT stability under various forced degradation tests (acidic, basic) and predicted the ... -
Metal nanoparticles for miRNA detection
Karasakal, Ayça (Marmara Univ, 2022)Biosensing can be used for analysis, diagnosis and determination of biological target structures. But the improvement of sensitivity and sensing threshold is an important problem to overcome. It is possible to solve this ... -
Molecules of benidipine: experimental and theoretical investigation
Karasakal, Ayça; Doğan, G.; Gürkan, Yelda Yalçın (Bulgarian Acad Science, 2017)In the search for a plausible mechanism for the photocatalytic degradation reaction of BEN, DFT reactivity descriptors were employed to have information about the most susceptible sites for hydroxyl radical attack. ...