挥发性有机物

Rapid detection of sepsis in rats through volatile organic compounds in breath.

ty10086 提交于 周四, 08/26/2021 - 12:58
Sepsis is one of the main causes of death in adult intensive care units. The major drawbacks of the different methods used for its diagnosis and monitoring are their inability to provide fast responses and unsuitability for bedside use. In this study, performed using a rat sepsis model, we evaluate breath analysis with Ion Mobility Spectrometry (IMS) as a fast, portable and non-invasive strategy.;This study was carried out on 20 Sprague-Dawley rats. Ten rats were injected with lipopolysaccharide from Escherichia coli and ten rats were IP injected with regular saline.

中国黄海7种海藻的挥发性成分特征

ty10086 提交于 周三, 08/25/2021 - 15:52
植物挥发性有机物( VOCs )代表了一类相对广泛的次生代谢产物。采用多纤维顶空固相微萃取-气相色谱-质谱联用技术( HS-SPME / GC-MS ),对我国黄海7种海藻(纤毛虫Grateloupia filicina、多刺虹吸藻Polysiphonia senticulosa、垂穗披碱草Callithamnion corymbosum、黑藻Sargassum thunbergii、滴虫Dictyota dichotoma、浒苔和浒苔Ulva lactuca )的挥发性有机物( VOC )进行了分析,其中纤毛藻Grateloupia filicina、多刺虹吸藻Polysiphonia senticulosa和垂穗披碱草Callithamnion corymbosum为首次报道。采用主成分分析法( PCA )揭示VOCs的特征类别和分子,并进行网络药理学预测候选海藻的潜在生物医学利用。本研究发现醛类是最丰富的VOC类别,( E ) -β-紫罗兰酮是所有7种海藻中唯一存在的化合物。浒苔中醛类的化学多样性提示了其在化学分类学方面的潜在应用,并暗示二乙烯苯/ carboxen /聚二甲基硅氧烷( DVB / CAR / PDMS )纤维更适合醛类的提取。D . dichooma中VOCs以倍半萜和二萜类化合物为特征,与之最相关的药理途径是神经活性配体-受体相互作用途径,提示D .