Veysel Umut Çelenk

ORCID: 0000-0001-8536-6498
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About
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Research Areas
  • Edible Oils Quality and Analysis
  • Essential Oils and Antimicrobial Activity
  • Antioxidant Activity and Oxidative Stress
  • Natural product bioactivities and synthesis
  • Nigella sativa pharmacological applications
  • Phytochemicals and Antioxidant Activities
  • Isotope Analysis in Ecology
  • Sesquiterpenes and Asteraceae Studies
  • Coconut Research and Applications
  • Nuts composition and effects
  • GABA and Rice Research
  • Free Radicals and Antioxidants
  • Food Science and Nutritional Studies
  • Phytochemistry and Biological Activities
  • Phytochemistry and biological activity of medicinal plants
  • Antimicrobial agents and applications
  • Water Treatment and Disinfection
  • Tea Polyphenols and Effects
  • Biochemical and biochemical processes
  • Advances in Cucurbitaceae Research
  • Cannabis and Cannabinoid Research
  • Biological Activity of Diterpenoids and Biflavonoids
  • Identification and Quantification in Food
  • Phytochemical compounds biological activities
  • Pharmacological Effects of Natural Compounds

Ege University
2016-2023

Many people tend to prefer natural foods and supplements nowadays. Considering this tendency, study assessed the most significant in quality purity parameters tocopherol fatty acid compositions of cold-pressed oils, namely black cumin, sesame, sunflower, poppy, pomegranate, nettle, pumpkin, grape, safflower, flax, canola seed, wheat germ, peanut, hazelnut, walnut. This deals with sample preparation validation tocopherols using an HPLC-FLD method for simultaneous determination α-β-γ-,...

10.18596/jotcsa.335012 article EN cc-by-nc-nd Journal of the Turkish Chemical Society Section A Chemistry 2017-10-15

Abstract Isotope ratio mass spectroscopy (IRMS) and nuclear magnetic resonance (NMR) techniques are two of the analytical methods that used to characterize food products. The aim this study is classify extra virgin olive oil (EVOO) samples collected from different regions Turkey based on 1 H 13 C NMR spectra along with IRMS δ carbon isotope data by using chemometrics multivariate analysis methods. A total 175 EVOO were analyzed in 2014/15 2015/16 harvest seasons. Multivariate classification...

10.1002/aocs.12697 article EN Journal of the American Oil Chemists Society 2023-03-23

This study was aimed to provide principle of the chemical analyses, antibacterial efficiency test and validation procedures most commonly used benzalkonium chloride (BAC) base disinfectant as a biocide.Disinfectant which comprised 20 % BAC concentration prototype product active substance verified with analysis.Additionally, homologs (n-C12 n-C14) in were identified by LC-MS/MS method.The results also confirmed reliability chromatographic method.After confirmed, microbiological efficacy...

10.18466/cbujos.05638 article EN Celal Bayar Üniversitesi Fen Bilimleri Dergisi 2016-04-30

Cocaine is a powerfully addictive illicit drug.Cocaine abuse and addiction continue to increase in the world.Most analytical tests for detection of cocaine use include analysis metabolite, benzoylecgonine, urine.Benzoylecgonine major urinary metabolite cocaine.Generally, most common biologic matrices used contain urine blood however saliva was also added as matrix this study.Practical, quick, reliable, precise accurate, reproducible methods have been developed validated benzoylecgonine.In...

10.18596/jotcsa.82665 article EN cc-by-nc-nd Journal of the Turkish Chemical Society Section A Chemistry 2016-10-08

Ö ZF armakolojik olarak aktif bir kimyasal kompozisyona sahip olan Nigella sativa L. (kara çörek otu) dünya çapında geniş kullanım alanı tıbbi bitkidir.Bu çalışmada, Mersin orjinli tohumlarının yağları soğuk sıkım tekniği ile elde edilmiştir.Soğuk kara otu yağının (KÇOY) içeriği, sterol kompozisyonu, yağ asitleri kompozisyonu ve triaçilgliseroller, fiziksel özellikleri ise kırılma indisi renk açısından değerlendirilmiştir.Başta β-sitosterol olmak üzere, sitostanol, Δ5-avenasterol...

10.15671/hjbc.2018.188 article TR Hacettepe Journal of Biology and Chemistry 2017-12-25

Triterpene saponins are bioactive glycosides which responsible for the defense mechanism of plants and have extensive structural diversity in many plant species.In this study, profile triterpene was determined crude n-BuOH extracts Cephalaria hirsuta, elazigensis var.elazigensis, procera taxa (Caprifoliaceae) by ultra pressure liquid chromatography coupled with electrospray ionization tandem mass spectrometry.The UPLC-ESI-MS/MS method has been validated to provide linearity, recovery,...

10.25135/rnp.45.17.10.179 article EN Records of Natural Products 2018-05-05
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