Research progress on the changes in flavor substances during black garlic processing [PDF]
Black garlic is produced through the fermentation of fresh garlic under conditions of high temperature and humidity, wherein various chemical reactions occur, gradually diminishing the pungent odor associated with garlic and imparting the distinctive ...
LI Hui +4 more
core +1 more source
Chemical Constituents in Chloroform Extraction of Tetrastigmatis hemsleyani Diels et. Gilg and Their Antitumor Activities [PDF]
, 2015 目的研究三叶青三氯甲烷部位的化学成分及其体外抗肿瘤活性。方法利用硅胶,制备薄层板,lH-20等各种色谱技术分离单体化合物,通过nMr和质谱对化合物进行结构鉴定,并采用气-质联用色谱对三叶青三氯甲烷部位的其他成分进行分析,采用MTT法对分离得到的单体化合物进行抗肿瘤活性评价。结果通过经典色谱法分离得到6个化合物,分析鉴定为β-谷甾醇(1),4-羟基-3-甲氧基苯甲醛(2),齐墩果酸(3),5-羟甲基糠醛(4),壬二酸(5)和香草酸(6),并通过gC-MS指认了22个化合物。结论化合物2 ...
丁丽, 王延辉, 章璐幸, 邱彦
core
Research on Conversion Pathways and Mechanisms for the Clean Production of 2,5-Diformylfuran [PDF]
, 2014 近年来，由生物质原料出发制取呋喃衍生物的研究受到人们的广泛关注，这是因为该研究有助于构筑一条获得各种可持续能源供给和生产可替代化学产品的有效途径。作为一种重要的呋喃衍生物，2,5-二甲酰基呋喃(DFF)具有十分广泛的应用前景。本文首先概述并探讨了分别以商品化5-羟甲基糠醛(HMF)和其他生物质衍生碳水化合物为初始材料进行DFF生产的催化转化途径，较为详细地介绍了这两类用于制取DFF的方法，并着重研究了其反应中所用的催化体系。另外，还对以这两类原料来制取DFF产品的优缺点进行了比较 ...
张盛强
core
, 2010 目的:研究猫爪草的化学成分。方法:用乙醇提取,硅胶、Sephadex LH-20及ODS柱色谱分离,采用NMR和MS等波谱方法进行结构鉴定。结果:分离得到7个化合物,分别为:phillygenin(Ⅰ)、邻苯二甲酸二(2-乙基己基)酯(DEHP,Ⅱ)、正二十一烷酸甲酯(Ⅲ)、5-羟甲基糠醛(Ⅳ)、豆甾醇和谷甾醇(Ⅴ和Ⅵ)的混合物、胡萝卜苷(Ⅶ)。结论:化合物I ...
丛悦 +4 more
core
Effect of Roasting Temperature on Volatile Components of Chicory Root Extract Analyzed by HS-SPME-GC-MS and Electronic Nose [PDF]
To investigate the effect of roasting temperature on the aroma quality of chicory root extract, headspace solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) combined with electronic nose technology was employed to analyze ...
Enkai ZOU +7 more
core +1 more source
Investigating the Impact of Different Oil Production Processes on the Quality and Flavor Characteristics of Hainan Camellia Oil Based on E-nose, GC-MS, and GC-IMS Analyses [PDF]
To clarify the impact of oil extraction processes on the overall quality and flavor of Hainan camellia oil, the quality and flavor characteristics of oils extracted by pressing (NT-P, HT-P), subcritical butane extraction (NT-SBE, HT-SBE), and ...
Liangxiao ZHANG +6 more
core +1 more source
Study on the Synthesis and Bioactivity of Thiosemicarbazones [PDF]
, 2009 酪氨酸酶（EC.1.14.18.1）是一种含铜的氧化还原酶，广泛存在于微生物、动植物以及人体内，能将酪氨酸转化成多巴醌，进而形成黑色素；过量的黑色素形成能产生色素沉着性疾病以及能使果蔬褐变，因此，研究酪氨酸酶抑制剂具有十分重要的意义。 本论文设计合成了7种缩氨基硫脲类化合物，并且研究了合成抑制剂对单酚酶和二酚酶的抑制作用机理。再以粗提的小鼠B16细胞的酪氨酸酶为研究对象，筛选该酶的抑制剂。以小鼠B16黑色素瘤细胞为研究对象，研究了合成的缩氨基硫脲类化合物对细胞增殖率、酪氨酸酶活性、黑色素含量以及酪氨酸酶、
李智聪
core
[Research progress on mechanism in adaptation of hemoglobin to plateau hypoxia]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue Ban, 2019 Li X, Li W, Feng S, Wang R.
europepmc +1 more source
[Preparation of a chiral porous organic cage-bonded silica high performance liquid chromatography stationary phase and its application to the resolution of chiral compounds]. [PDF]
Se PuWu JL +5 more
europepmc +1 more source