Publications by authors named "Yanmei Xi"

In this study, raw milk was collected from three different grades of pastures and processed by pasteurization, blending and ultra-high temperature sterilization (UHT) in a factory production line with a feed size of 10 tons. Additionally, all samples (from raw milk to UHT milk samples) were analyzed by -nose and GC-MS. Key flavor compounds such as 2-heptanone, hexanal, nonanal, 3-methyl-butanal, and dimethyl sulfide were found.

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Article Synopsis
  • - The study investigates how lactic acid bacteria affect the flavor and quality of fermented milk, which is important for consumer preference.
  • - Key flavor components identified during fermentation include benzaldehyde, octanoic acid, and n-hexanol, with quality stabilizing after 24 hours and optimal aroma reached at 48 hours.
  • - Among three tested prebiotics, inulin was found to significantly enhance the organoleptic quality of the fermented milk, aiding in flavor retention and release during fermentation.
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Ultra-high temperature (UHT) milk is popular among consumers. However, its flavor and texture change in its shelf life. Flavor is highly determinative for the success of dairy products and for consumers' willingness to buy.

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In the process of defatting milk, preheating treatment is an important factor affecting the flavor of skim milk. Here, raw milk was preheated at different times and temperatures. Then laser confocal microscopy, multiple-light scattering instrument, and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) were used to analyze the microstructure of milk fat globule membrane (MFGM), milk stability, and MFGM protein (MFGMP) components.

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Flavor sensation is one of the most prevalent characteristics of food industries and an important consumer preference regulator of dairy products. So far, many volatile compounds have been identified, and their molecular mechanisms conferring overall flavor formation have been reported extensively. However, little is known about the critical flavor compound of a specific sensory experience in terms of oxidized off-flavor perception.

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Objectives: To explore the cytotoxicity of four wild mushrooms involved in a case of Yunnan sudden unexplained death (YNSUD), to provide the experimental basis for prevention and treatment of YNSUD.

Methods: Four kinds of wild mushrooms that were eaten by family members in this YNSUD incident were collected and identified by expert identification and gene sequencing. Raw extracts from four wild mushrooms were extracted by ultrasonic extraction to intervene HEK293 cells, and the mushrooms with obvious cytotoxicity were screened by Cell Counting Kit-8 (CCK-8).

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Infant formula is related to children's life and health. However, the existing identification methods for infant formula are time-consuming, costly and prone to environmental pollution. Therefore, a simple, efficient and less polluting identification method for infant formula is urgently needed.

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Infant formula milk powder (IFMP) is an excellent substitute for breast milk. It is known that the composition of maternal food during pregnancy and lactation and exposure level to food during infancy highly influence taste development in early infancy. However, little is known about the sensory aspects of infant formula.

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Article Synopsis
  • The study aimed to explore the causes of sudden unexpected death (SUD) by conducting whole exome sequencing (WES) on families affected by SUDs to identify high-risk individuals.* -
  • Researchers found 49 single nucleotide variants (SNVs) in genes related to cardiac diseases in a group of 25 individuals from 14 families, with 29 of these SNVs predicted to be pathogenic.* -
  • The study concluded that individuals with certain ECG abnormalities and specific pathological SNVs should be prioritized for prevention efforts against sudden death.*
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Long QT syndrome (LQTS) is known to be involved in some sudden unexplained death (SUD) cases. To make clear whether the pathogenic genes of LQTS are involved in SUD in Yunnan province, southwest of China, we examined 4 mutation hotspot segments of KCNQ1, KCNH2, and SCN5A genes in 83 SUD cases using polymerase chain reaction and direct DNA sequencing. Genomic DNA was extracted from paraffin-embedded tissues in 83 cases of sudden cardiac death.

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