High quality diet attenuated the positive association between polychlorinated biphenyls and premature mortality among middle-aged and older adults.

Objective: Polychlorinated biphenyls (PCBs) have been reported to be a risk factor for premature death, while a high diet quality is thought to lower mortality risk. We aimed to examine whether PCBs were associated with higher all-cause and cause-specific mortality risk and whether such associations could be modified by the diet quality among US middle-aged and older adults.

Methods: Included were 1259 participants aged 40 years or older from the 1999-2004 National Health and Nutrition Examination surveys.

Current Helicobacter pylori Infection Is Associated with Early Liver Injury: A Cross-Sectional Study in the General Population.

Early prevention of liver injury by controlling risk factors deserves concern because of the heavy liver disease burden. Helicobacter pylori (HP) infection affects half of the world's population and the relationship between it and early liver damage is unclear. This study focuses on assessing the correlation between them in the general population to provide clues to prevent liver disease.

Effects of Guangzhou seasonal climate change on the development of Aedes albopictus and its susceptibility to DENV-2.

The susceptibility of Asian tiger mosquitoes to DENV-2 in different seasons was observed in simulated field environments as a reference to design dengue fever control strategies in Guangzhou. The life table experiments of mosquitoes in four seasons were carried out in the field. The susceptibility of Ae.

Semi-field life-table studies of Aedes albopictus (Diptera: Culicidae) in Guangzhou, China.

Background: Aedes albopictus is a major vector for several tropical infectious diseases. Characterization of Ae. albopictus development under natural conditions is crucial for monitoring vector population expansion, dengue virus transmission, and disease outbreak preparedness.

[Determination of methamphetamine in human blood using microwave extraction-gas chromatography].

A method was developed for the determination of methamphetamine (MAM) in human blood using microwave extraction-gas chromatography (GC). To improve the extraction efficiency, experimental parameters on the extraction, including such as extraction solvent and its amount, pH value of blood sample, extraction time and temperature were investigated. Comparing with conventional liquid-liquid extraction method, the microwave extraction showed better efficiency under the optimal conditions.