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3 results on '"Ya-Chih Cheng"'

1. Antioxidant Capacities of Jujube Fruit Seeds and Peel Pulp

Author

Yung-Sheng Lin, Wen-Shin Lin, Jing-Wen Tung, Ya-Chih Cheng, Min-Yun Chang, Cheng-You Chen, and Shu-Ling Huang

Subjects
Ziziphus jujuba, jujube, antioxidant, peel, pulp, seed, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

In this study, the effects of different fruit parts and extraction conditions on the antioxidant properties of jujube (Ziziphus jujuba Mill.) fruit were investigated. Five in vitro antioxidant models and statistical analyses were performed. The results revealed that jujube peel with pulp (peel pulp) exhibited better antioxidant capacity than did seeds. Overall, jujube peel pulp extracted using 50% ethanol at 60 °C exhibited the best antioxidant capacity in terms of 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity (0.3 ± 0 mg/mL), 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activity (0.5 ± 0 mg/mL), total phenolic content (38.3 ± 0.4 mg gallic acid equivalent per gram dry weight), total flavonoid content (43.8 ± 0.2 mg quercetin equivalent per gram dry weight), and reducing power (41.9 ± 2.2 mg ascorbic acid equivalent per gram dry weight). The results indicated that jujube peel pulp is a more potential natural antioxidant than seeds.

Published
2020
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2. Antioxidant Capacities of Jujube Fruit Seeds and Peel Pulp

Author

Ya-Chih Cheng, Yung-Sheng Lin, Cheng-You Chen, Wen-Shin Lin, Jing-Wen Tung, Shu-Ling Huang, and Min-Yun Chang

Subjects
Antioxidant, antioxidant, genetic structures, medicine.medical_treatment, Flavonoid, 01 natural sciences, lcsh:Technology, lcsh:Chemistry, chemistry.chemical_compound, pulp, General Materials Science, Food science, Gallic acid, Instrumentation, lcsh:QH301-705.5, Fluid Flow and Transfer Processes, chemistry.chemical_classification, Chemistry, Pulp (paper), General Engineering, food and beverages, 04 agricultural and veterinary sciences, 040401 food science, lcsh:QC1-999, Computer Science Applications, Ziziphus jujuba, jujube, Quercetin, engineering.material, 0404 agricultural biotechnology, food, Dry weight, stomatognathic system, medicine, peel, lcsh:T, Process Chemistry and Technology, 010401 analytical chemistry, Ascorbic acid, food.food, eye diseases, 0104 chemical sciences, stomatognathic diseases, lcsh:Biology (General), lcsh:QD1-999, lcsh:TA1-2040, engineering, extraction, lcsh:Engineering (General). Civil engineering (General), seed, lcsh:Physics
Abstract

In this study, the effects of different fruit parts and extraction conditions on the antioxidant properties of jujube (Ziziphus jujuba Mill.) fruit were investigated. Five in vitro antioxidant models and statistical analyses were performed. The results revealed that jujube peel with pulp (peel pulp) exhibited better antioxidant capacity than did seeds. Overall, jujube peel pulp extracted using 50% ethanol at 60 &deg, C exhibited the best antioxidant capacity in terms of 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity (0.3 &plusmn, 0 mg/mL), 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activity (0.5 &plusmn, 0 mg/mL), total phenolic content (38.3 &plusmn, 0.4 mg gallic acid equivalent per gram dry weight), total flavonoid content (43.8 &plusmn, 0.2 mg quercetin equivalent per gram dry weight), and reducing power (41.9 &plusmn, 2.2 mg ascorbic acid equivalent per gram dry weight). The results indicated that jujube peel pulp is a more potential natural antioxidant than seeds.

Published
2020

3. Comparison of the Accuracy of Matrix-Assisted Laser Desorption Ionization–Time of Flight Mass Spectrometry with That of Other Commercial Identification Systems for Identifying Staphylococcus saprophyticus in Urine

Author

Chung-Ming Chen, Hao Lee, Meng-Yu Chung, Ya-Chih Cheng, Chen-Ching Hsu, Shih-Hua Teng, Shin-Hei Du, Po-Ren Hsueh, Lee-Jene Teng, and Tai-Fen Lee

Subjects
Microbiology (medical), Staphylococcus saprophyticus, Chromatography, biology, Base Sequence, Chemistry, Matrix assisted laser desorption ionization time of flight, Bacteriology, Urine, Sequence Analysis, DNA, Staphylococcal Infections, biology.organism_classification, Mass spectrometry, bacterial infections and mycoses, equipment and supplies, Microbiology, Bacterial Typing Techniques, body regions, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Humans, Base sequence
Abstract

Among 30 urinary isolates of Staphylococcus saprophyticus identified by sequencing methods, the rate of accurate identification was 100% for Bruker Biotyper matrix-assisted laser desorption ionization–time of flight mass spectrometry (MALDI-TOF MS), 86.7% for the Phoenix PID and Vitek 2 GP systems, 93.3% for the MicroScan GP33 system, and 46.7% for the BBL CHROMagar Orientation system.

Published
2013

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