Publications by authors named "Shuanghong Cheng"

Article Synopsis
  • - The study investigates the changes in anthocyanin content and related regulatory genes during the ripening of oil palm fruit, which is important for both its commercial and ornamental value.
  • - Analyzing oil palms at different developmental stages revealed a significant decrease in total anthocyanin content as the fruits matured, demonstrating a clear trend over time.
  • - Nine genes linked to the anthocyanin biosynthesis pathway were found to be up-regulated during the early developmental stages of the fruit, suggesting their critical role in color development and maturity identification.
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Oil palm is a versatile oil crop with numerous applications. Significant progress has been made in applying histological techniques in oil palm research in recent years. Whole genome sequencing of oil palm has been carried out to explain the function and structure of the order genome, facilitating the development of molecular markers and the construction of genetic maps, which are crucial for studying important traits and genetic resources in oil palm.

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Oil palm, a tropical woody oil crop, is widely used in food, cosmetics, and pharmaceuticals due to its high production efficiency and economic value. Palm oil is rich in free fatty acids, polyphenols, vitamin E, and other nutrients, which are beneficial for human health when consumed appropriately. Therefore, investigating the dynamic changes in free fatty acid content at different stages of development and hypothesizing the influence of regulatory genes on free fatty acid metabolism is crucial for improving palm oil quality and accelerating industry growth.

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In this paper, we analyze the status of the medical device testing and the situation of the unqualifie varieties by sorting out the situation of the national medical device supervision and inspection from 2013 to 2016. We analyze the results of the inspection deeply, and find that the safety risk points exists in the quality of the medical device testing products and management system, product technology requirements, the national standards, industry standards or other aspects, then explain one by one with typical examples. At the same time the corresponding suggestions are put forward to production companies and regulators respectively on the existing problems.

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Generic drugs should be interchangeable with originators in terms of quality and efficacy. With relative lower prices, generic drugs are playing an important role in controlling health expenditures and ensuring access. However, the widespread understanding of "cheap price equals low quality" has a negative impact on the acceptance of generic drugs.

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A Fast Chemical Identification System (FCIS) consisting of two colour reactions based on functional groups in molecules of macrolide antibiotics and two TLC methods was developed for screening of fake macrolide drugs. The active ingredients could be extracted from their oral preparations by absolute alcohol. Sulfuric acid reaction as a common reaction of macrolides was first used to distinguish the macrolides from other types of drugs and then 16-membered macrolides and 14-membered ones were distinguished by potassium permanganate reactions depending on the time of loss of colour in the test solution; after which a TLC method carried out on a GF(254) plate (5 cm x 10 cm) was chosen to further identification of the macrolides.

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Aim: To study the crystalline characteristics of ceftezole sodium.

Methods: Ceftezole sodium crystals were obtained from different solvents. X-ray diffraction, DSC, TGA, etc were used to analyze the crytals.

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