The aim of this study was to examine the association between air temperature and incidence of acute coronary heart disease in Northeast China. Methods: We obtained coronary heart disease (CHD) daily hospitalization data from January 2017 to June 2019, and collected meteorological data including average daily air temperature, air pressure, relative humidity, wind velocity, sunshine duration and water vapor pressure, for the same period. Totally, This study included data from 6775 patients with CHD. Results: After adjusting for confounding factors, low air temperature was inversely associated with CHD. Additionally, in the warm season (April-September), the number of daily hospital admissions for CHD was higher (≥24.2°C) if the average daily air temperature was low (≤15.4°C). Conclusion: Low air temperature might be a risk factor for CHD among the elderly, especially in the warm season.

Background: The aim of this study was to evaluate the frequency of red blood cell (RBC) alloantibodies in surgical patients. Methods: Blood samples of 18,980 Chinese surgical patients were collected and tested between January 2009 and September 2010. For patients with RBC alloantibodies, sequences of antibodies were identified with the DiaMed Asia antibody screening system. Data regarding sex, age, transfusion history, pregnancy history, and alloantibody specificity were collected. Results: 39 alloantibodies were identified from 18,980 samples, yielding a prevalence of 0.21%. The most frequently identified alloantibodies were Rhesus system antibodies (28/39, 71.8%), including anti-E (17/39; 1 anti-E accompanied by anti-Fy^b), anti-c (5/39), anti-cE (2/39), anti-C^w (1/39), anti-D (1/39), and anti-e (1/39). Other antibodies included anti-M (5/39), anti-Le^a (2/39), anti-Le^b (1/39), anti-K+S (1/39), anti-JK^a (1/39), and anti-JS^a (1/39). The frequency of alloantibodies was greater in females than in males (31 vs. 8). Conclusion: The results show a higher prevalence of RBC alloantibodies in females than in males. Anti-E was the most common alloantibody identified in this Chinese surgical population and was also more frequent in females compared to males.

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In western China, carbonate reservoirs are deeply buried and the surface is very loose. Due to Earth filtering, the high-frequency component of seismic waves is seriously absorbed. This causes a decrease in the dominant frequency and a narrowing of the frequency bandwidth of the seismic signals from a deep target. In the Tarim Basin, the most prospective reservoirs are below 6000 m. The seismic data recorded in these areas always show weak energy, low frequency, and phase distortion. Additionally, due to the desert surface, the energy of the seismic waves suffers serious absorption.