Effect of different tea manufacturing methods on the antioxidant activity, functional components, and aroma compounds of Ocimum gratissimum

Effect of different tea manufacturing methods on the antioxidant activity, functional components, and aroma compounds of Ocimum gratissimum
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不同制茶方法对罗勒抗氧化活性、功能成分及香气成分的影响

DOI:
10.1016/j.lwt.2022.114058
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发表时间:
2022
期刊:
LWT
影响因子:
--
通讯作者:
Tsuchiya Izumi
Tsuchiya Izumi
中科院分区:
--
文献类型:
--
作者:
Tsurunaga Yoko;Kanou Mina;Ikeura Hiromi;Makino Masatomo;Oowatari Yasuo;Tsuchiya Izumi

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罗勒是一种草本药用植物,以其高抗氧化活性而闻名。在本研究中,我们研究了不同的茶叶制造工艺对保留 O 的生化特性的影响。免费并确定哪一个过程可以产出高品质的茶叶。我们测定了处理过的样品的色调、总多酚含量 (TPC)、气味、2-二苯基-1-三硝基苯肼 (DPPH) 值和亲水性氧自由基吸收能力 (H-ORAC)。蒸煮时间影响色调、TPC、DPPH值、菊苣酸含量和气味,而干燥温度和发酵处理则影响所有参数。此外,石竹烯、香叶烯-D 和丁子香酚被确定为 O 中的主要香气化合物。免费。我们的研究结果表明,干燥温度和发酵处理是影响O的生化特性和验收质量的主要因素。免费茶。在所采用的不同处理方法中,机器干燥而不进行汽蒸处理的气味效果最好。冷冻干燥成本较高,但TPC和抗氧化活性最好;然而,我们发现,与冷冻干燥处理相比,MD 相对便宜,通过在干燥前蒸煮 2 分钟,可以保持较高的 TPC、DPPH、H-ORAC 值和菊苣酸含量。
Ocimum gratissimumis a herbaceous medicinal plant known for its high antioxidant activity. In the present study, we investigated the effect of different tea manufacturing processes in retaining the biochemical properties ofO. gratissimumand determined which of the processes yields a high-quality tea. We determined the color tone, total polyphenol content (TPC), odor, 2-diphenyl-1-picrylhydrazyl (DPPH) values, and hydrophilic oxygen radical absorbance capacity (H-ORAC) of treated samples. Steaming time affected the color tone, TPC, DPPH value, chicoric acid content, and odor, while the drying temperature and fermentation treatment affected all the parameters. Furthermore, caryophyllene, germacrene-D, and eugenol were identified as the main aroma compounds inO. gratissimum. Our findings indicate that the drying temperature and fermentation treatment are the major factors affecting the biochemical properties and acceptance quality ofO. gratissimumtea. Among the different treatments used, machine-drying without steaming treatment was the best on odor. Freeze-drying, which is more costly, was the best on the TPC and antioxidant activities; however, it was found that MD, which is relatively cheap compared to freeze-drying treatment, maintained high TPC, DPPH, H-ORAC values, and chicoric acid content by steaming for 2 min before drying.
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