用PBS作为悬浮介质代替PVP用于红细胞变形性测量的可能性评估

用激光衍射仪测量RBC的变形性一般要求所用缓冲液的粘度高于18CP,以其获得稳定的,具有可比性的数据,常用的是不同浓度的右旋糖酐溶液。这在实用中带来两个问题;(1)粘度太高,故实验时红细胞所受剪切应力远高于生理水平;(2)价格昂贵,不利于临床推广。因此,我们试图寻求一种可以代替右旋糖酐溶液的新的缓冲液。本文中用了两种缓冲液,即PBS和15％PVP和四种不同的红细胞组成的悬浮液,

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^