Effect of blanching and microwave-hot air drying of Asparagus racemosus Willd. tuberous roots on shelf life

IF 3.8 2区 农林科学 Q1 PLANT SCIENCES
Lamul Wiset , Phattharanan Thiangma , Nattapol Poomsa-Ad , Somsak Nualkaew , Nitra Nuengchamnong , Ruttanakorn Munjit , Woranan Nakbanpote
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Abstract

The quality of dried tuberous roots of Asparagus racemosus Willd. depends on the drying method and storage conditions. This research aims to compare three methods for drying blanched and non-blanched root slices: tray drying at 60 °C (TD 60 C), microwave-assisted hot air drying at 1000 W with 60 °C (MW1000+60 C), and at 1500 W with 60 °C (MW1500+60 C). Drying efficiency was evaluated over a one-year shelf life. The blanching was carried out at 80 °C for 5 min. MW1000 60 C was the most suitable for brightness, total phenolic content (TPC), total flavonoid content (TFC), total saponin content (TSC), and sugar content. Its brightness (L*), TPC, TFC, and TSC were 90.90 ± 1.08, 1.96 ± 0.08 mg GAE/g DW, 0.69 ± 0.07 mg ECE/g DW, and 1256.8 ± 25.1 mg SE/g DW, respectively. Total sugar content and total reducing sugar content were 1577.1 ± 17.1 mg Glu/g DW and 47.43 ± 2.06 mg Glu/g DW, respectively. Blanching before MW1000+60 C decreased TPC, TFC, total sugar content, and total reducing sugar content by 31 %, 25 %, 20 %, and 43 %, respectively, but did not reduce the TSC. The optimum shelf life was 6 months. The storage for 12 months caused negative changes in moisture content, colour, TPC, TFC, sugar content, and microbial load. The saponin compounds were asparacoside, shatavarin IX, shatavarin V, asparanin A, aspafilioside B, and sarsasapogenin 3-[4''-glucosyl-6''-arabinosylglucoside]. Theasaponin E3 was found in blanched and dried roots after 12 months. Consequently, this research provided guidelines for drying methods and monitoring shelf life.
焯水和微波热风干燥芦笋块根对货架期的影响
干芦笋块根的质量取决于干燥方法和储存条件。本研究旨在比较三种干燥焯过和未焯过根片的方法:60 °C下的托盘干燥(TD 60 C)、1000 W 60 °C下的微波辅助热风干燥(MW1000+60 C)和 1500 W 60 °C下的微波辅助热风干燥(MW1500+60 C)。在一年的保质期内对干燥效率进行了评估。焯烫温度为 80 ℃,时间为 5 分钟。在白度、总酚含量(TPC)、总黄酮含量(TFC)、总皂苷含量(TSC)和糖含量方面,MW1000 60 C 最为合适。其亮度(L*)、总酚含量(TPC)、总黄酮含量(TFC)和总皂苷含量(TSC)分别为 90.90 ± 1.08、1.96 ± 0.08 毫克 GAE/g DW、0.69 ± 0.07 毫克 ECE/g DW 和 1256.8 ± 25.1 毫克 SE/g DW。总糖含量和总还原糖含量分别为 1577.1 ± 17.1 mg Glu/g DW 和 47.43 ± 2.06 mg Glu/g DW。在 MW1000+60 C 前进行脱水处理可使 TPC、TFC、总糖含量和总还原糖含量分别降低 31%、25%、20% 和 43%,但不会降低 TSC。最佳保质期为 6 个月。贮藏 12 个月会导致水分含量、色泽、TPC、TFC、糖含量和微生物量发生负面变化。皂苷化合物为天冬皂苷、沙打旺苷 IX、沙打旺苷 V、天冬皂苷 A、天冬皂苷 B 和天冬皂苷 3-[4''-葡萄糖基-6''-阿拉伯糖基葡萄糖苷]。12 个月后,在焯过和晒干的根中发现了菝葜皂苷 E3。因此,这项研究为干燥方法和货架期监测提供了指导。
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来源期刊
Journal of Applied Research on Medicinal and Aromatic Plants
Journal of Applied Research on Medicinal and Aromatic Plants Pharmacology, Toxicology and Pharmaceutics-Drug Discovery
CiteScore
6.40
自引率
7.70%
发文量
80
审稿时长
41 days
期刊介绍: JARMAP is a peer reviewed and multidisciplinary communication platform, covering all aspects of the raw material supply chain of medicinal and aromatic plants. JARMAP aims to improve production of tailor made commodities by addressing the various requirements of manufacturers of herbal medicines, herbal teas, seasoning herbs, food and feed supplements and cosmetics. JARMAP covers research on genetic resources, breeding, wild-collection, domestication, propagation, cultivation, phytopathology and plant protection, mechanization, conservation, processing, quality assurance, analytics and economics. JARMAP publishes reviews, original research articles and short communications related to research.
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