Publications by authors named "Dejian Feng"

Using high-performance liquid chromatography-mass spectrometry, fifteen bisphenols and halogenated phenols were simultaneously analyzed in tea for the first time in China. Response surface methodology was used to optimize sample preparation conditions based on QuEChERS. Finally, the limits of detection and the limits of quantification were 0.

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Article Synopsis
  • Jasmine tea is highly valued for its unique aroma and is considered the top flower tea, leading to a study that evaluated the quality of 92 different jasmine tea samples.
  • The study categorized the teas into three types: "fresh and lovely," "heavy and thick," and "fresh and heavy," using various quality evaluation methods.
  • Gas chromatography-mass spectrometry identified key aroma components like α-Farnesene and linalool, revealing that the "fresh and lovely" type had a more diverse aroma profile compared to the other two types, which had less variety in aroma characteristics.
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l-Theanine is the most abundant free amino acid present in tea. Several tea components have been studied for their impact on male fertility, but little is known about the effects of l-theanine. Cyclophosphamide (CP) is an antineoplastic and immunosuppressive agent that reduces fertility in males.

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A method based on gas chromatography-mass spectrometry (GC-MS) was developed for the simultaneous determination of 29 adjuvants in pesticide formulations. The pesticide formulation was diluted with methanol, and the supernatant was filtered through a 0.22-μm membrane.

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Background: Environment-Protection-Agency Reference Doses (EPA RfDs) for phthalate intakes are based on limited evidence, especially regarding low-dose male-reproductive toxicity. This study investigates the association between phthalate exposure and semen parameters and reproductive hormones in a general population with low phthalate exposure compared to the EPA RfDs.

Methods: The MARHCS (Male-Reproductive-Health-in-Chongqing-College-Students) cohort recruited 796 male students, who experienced a relocation of campuses and shifting environmental exposure.

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