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    Comparison of different drying methods for phytochemical quality of stevia (Stevia rebaudiana Bert.)
    (Horticulture and Forestry Society from Transylvania, 2023) Özyiğit, Yaşar; Uçar, Esra; Eruygur, Nuraniye; Ataş, Mehmet; İnanir, Merve; Bal, Halil; Kahrizi, Danial
    This study examined the effects of different drying methods on the chemical content, antioxidant, antibacterial, enzymatic and anticancer activity values of stevia (Stevia rebaudiana Bert.) extract. Stevia leaves were dried using four different methods (in the sun, shade, air conditioner, and oven), and extracts were collected and analyzed. Based on extract content, 2-tetradecyl acrylate was the major ingredient in air-conditioned and oven-dried applications (25.00% and 21.47%, respectively). The same compound was detected in both sun-drying and shade-drying methods, but the content was low. The antioxidant activity values of the samples were evaluated with 1,1-Diphenyl-2-picrylhydrazyl (DPPH) and 2,2?-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging tests. While the best result for DPPH (IC50 value 57.94 ± 0.63 µg/mL) was found in the shade-dried stevia samples, the best result in terms of ABTS test (IC50 value 44.03 ± 1.22 µg/mL) ml) was detected in oven-dried. When the samples were examined in terms of antimicrobial activity, it was seen that extracts of all drying methods were effective against Staphylococcus aureus. However, it was determined that the extracts obtained from plants dried in air conditioning and oven had a stronger effect. The cell viability assay was utilized to assess the antiproliferative effects of extract on L929 and MDA-MB-231 cell lines. The extracts did not significantly affect the L929 cell viability, while MDA-MB-231 remarkably reduced cell viability (sun drying, IC50 = 0.9 mg/mL; oven drying, IC50 = 0.65 mg/mL; shade drying, IC50 = 0.74 mg/mL; air conditioner drying, IC50 = 0.47 mg/mL). In particular, the extract obtained by the air conditioner drying method showed the most prominent cytotoxic effect. The results showed that drying using different methods had an impact on the quality standards of the stevia leaves. © 2023, Horticulture and Forestry Society from Transylvania. All rights reserved.
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    In vitro antioxidant assessment, screening of enzyme inhibitory activities of methanol and water extracts and gene expression in Hypericum lydium
    (SPRINGER, 2019) Eruygur, Nuraniye; Ucar, Esra; Akpulat, Huseyin Askin; Shahsavari, Keyhan; Safavi, Seyed Mehdi; Kahrizi, Danial
    Hypericum lydium Boiss. is a perennial plant of the Hypericaceae family, which has been used in particular to treat depression. The aim of this study was to determine in vitro antioxidant, antimicrobial activities, anticholinesterase (acetylcholinesterase (AChE)/butyrylcholinesterase (BChE)), antidiabetic activities (-glucosidase/-amylase) and Tyrosinase inhibitor activity of methanol and water extracts of H. lydium. Also, gene expression has been evaluated in the shoot and root by microarray technology. So, in general, the purpose of this study is to study the active molecules such as antioxidant, antimicrobial, antidiabetic, enzymes and genes in the plant, which is the first to be reported. The experiments were conducted in a completely randomized design with three replications. In addition, gene expression was compared in the shoot and root parts. Expression profiling was carried out by microarrays. According to the results, the highest chemical components were determined in methanol extract rather than water extract. There was a difference between the obtained components. While the highest antioxidant activity was determined from the methanol extract of plant herbs for DPPH Free Radical Scavenging Activity, antioxidant activity was the same in both methanol and water extracts using the ABTS method. The methanol extract demonstrated stronger anticholinesterase (AChE and BChE) and -amylase inhibition activity. This study was complemented by the detection of antioxidant activity and some enzyme inhibition activity in the methanol extract. Microarray showed 10,784 genes had significantly different expression in root and shoot. There was a positive effect of methanol extract in respect of different activities compared to the water extract. Gene expression showed that the number of expressed genes in the root was greater than the shoot.
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    A simplified and optimized protocol for total DNA extraction from insect species: applicable for studying genetic diversity and PCR-based specimen identification via partial amplification of cytochrome oxidase I (COI) gene
    (C M B ASSOC, 2018) Paydar, Samira; Ucar, Esra; Yari, Peyman; Safavi, Seyed Mehdi; Kahrizi, Danial; Nateqi, Masoud; Mirmoayedi, Alinaghi; Yari, Kheirollah
    The efficient DNA extraction from insects has been suggested as a critical and main step affecting molecular entomology for taxonomic identification, the establishment of DNA barcoding library and analysis of genetic diversity relationship between insect populations. For successfully apply these molecular techniques, high-quantity and high-quality of the extracted DNA are required. Several protocols for efficient genomic DNA extraction from insects have been developed. In this research, we represent a rapid, reliable and cost-effective method that it is not reliant on poisonous and enzymatic reagents for DNA extraction from insect tissues. Results showed that high quantity and high-quality of the isolated DNA by this method is suitable and can be used directly for PCR, also is enough to do hundreds of molecular reactions. In conclusion, we described a fast, cost-effective, non-toxic and enzyme-free protocol for high yield genomic DNA extraction from green Lacewings (Chrysoperla carnea) tissues in basic equipment laboratories.