Clinical efficacy of low-dose aspirin combined with calcium in preventing preeclampsia: A systematic review and meta-analysis.

Objective: This systematic review and meta-analysis aimed to evaluate the clinical effectiveness of low-dose aspirin combined with calcium supplements for the prevention of preeclampsia.

Methods: China National Knowledge Infrastructure, VIP, Wanfang, PubMed, EMBASE, and Cochrane Library databases were searched from inception until December 2022. Randomized controlled trials investigating the preventive use of aspirin in combination with calcium supplementation for preeclampsia in high-risk pregnant women were included.

[The glymphatic system: concept, function and research progresses].

The glymphatic system is a cerebrospinal fluid-interstitial fluid exchange system dependent on the water channel aquaporin-4 polarized on astrocyte endfeet, which is proposed to account for the clearance of abnormal proteins (e.g. β-amyloid) and metabolites (e.

[Measurement difference in paddy field nitrogen leakage by using different type lysimeters].

Vertical and 'T' types of lysimeter were used to measure the concentrations of ammonia N, nitrate N, and total nitrogen (TN) in the leakage of paddy field in rice growth season under different N application levels. For ammonia N, its concentration measured with these two types of lysimeter all ranged in 0-8 mg x L(-1) in 2007 and 0-4 mg x L(-1) in 2006; for nitrate N, its concentration measured with vertical lysimeter was 0-4 mg x L(-1) in 2007 and basically the same in 2006, while that measured with 'T' type lysimeter was 0-20 mg x L(-1) in 2007 but lower in 2006. The TN concentration in the leakage was 0-60 mg x L(-1) in 2007, much higher than that (0-16 mg x L(-1)) in 2006.

[Studies on tea plants (Camellia sinensis) germplasms using EST-SSR marker].

Forty two tea varieties were analyzed by using 16 SSR primer sets derived from tea ESTs in this study, and 13 of the primer sets produced clear bands and 10 of them showed polymorphism, accounting for 76.9%. The PIC (polymorphism information content) for each polymorphic primer set varied from 0.