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1.
本文报告了西宁地区外环境空气离子状况.全市空气负离子平均浓度313±160个/cm3,正高于451±204个/cm3、夏季空气离于浓度明显高于冬季(P<0.01)。空气离子单极系数为1.44,安培空气质量评价指数为0.22,属E级临界值。各行政区、功能区之间空气离子浓度有所不同,空气负离子以公园游览区最高,工业区最低,差别有高度显著性(P<0.01)、用空气离子单极系数和安培空气质量评他指数评价各功能区空气质量,从好到差依次为;公园游览区、生活居住区、商业交通繁忙区、工业区,二种评价指标结果相同,符合一般规律,我们认为可以用空气离子单极系数和安培空气质量评价指数评价西宁地区空气质量状况。  相似文献   

2.
<正> 19世纪一些学者已肯定空气离子有生物学作用。在它生理作用尚不十分清楚之前,单极空气离子即已应用于治疗疾病。曾进行了数以百计的人群观察,证明空气离子对人没有明显的不良反应。通过呼吸道进入人体的空气离子,刺激肺内感受器、影响血流及内分泌。在某些字者的试验指出只有空气负离子存在时,才有治疗意义,而空气正离子只有在某些条件下才有较好的反应。离子浓度太小不产生明显的作用,而过量也有不利的地方,但不产  相似文献   

3.
介绍一种我们研制的新型液体电极式空气负离子发生器。其特点是:负离子浓度高,几乎无臭氧;可一机两用,既是空气负离子发生器,又是药物气态离子治疗机。临床应用表明,本发生器疗效显著,深受用户欢迎,应用前景广阔。  相似文献   

4.
目的提出一种专门用于空气负离子生物效应实验的测量方法,使评价空气负离子生物效应时受试者所接受的剂量浓度和总剂量等数据更接近准确.方法模拟人体的吸气量,以电池为电源,用微型收集器与环境空气离子测量仪同步测试实验环境.结果微型收集器对空气离子环境的扰动远小于环境空气离子测量仪,结论为保证实验结论准确,在空气负离子生物效应实验中,应使用专用的空气负离子剂量测量装置取代环境空气离子测量仪.  相似文献   

5.
我们于1980—1981年对接受空气负离子治疗的病人进行了脑血流图的观察,其结果如下。 一、治疗机及仪器 空气负离子治疗机(自制)直流电压1.5~7.5万伏,可调;空气负离子密度(距伞状电极25厘米)4~20×10~6个/cm~3(SD型大气离子浓度测定仪测定值),臭氧浓度0.2mg/m~3以下。 XLY血流传感仪;7121B型热笔式心电图机。  相似文献   

6.
虽然现代潜艇的微小环境有了很大改善,但是潜艇上高温、高湿、噪音、振动等环境因素的作用仍给艇员带来一定的影响,尤其对远航艇员的影响,造成远航疲劳。由于环境因素的多样性和机体反应的复杂性,给艇员远航疲劳的预防带来一定的困难。根据空气离子的多作用特点,我们在远航艇上应用空气负离子发生器,以企改善潜艇微小环境,改善艇员的主观感觉,加速返航后艇员的康复。现将试用结果报告如下。试用方法一、空气负离子发生器的性能,在艇内的分布与使用要求。所用空气负离子发生器为台式单人用电晕式空气负离子发生器和水离子发生器两种。电晕式离子发生器的工作电压为7000V  相似文献   

7.
海滨气候与空气负离子   总被引:2,自引:0,他引:2  
大量试验证实,空气负离子具有广泛的生物学效应。为了探讨鼓浪屿海滨空气负离子浓度变化规律,以利择病择期收容疗养员,更好地组织疗养员进行户外活动。我们于1989年3月至1990年2月在鼓浪屿西南角疗养区内定人、定时、定点测试海滨空气负离子浓度,同时观测气温、湿度、气流、海雾等气象因素及海浪、潮汐、天气等。本文着  相似文献   

8.
目的 对栀子苷和梓醇在电喷雾质谱下的裂解途径进行探讨.方法 采用高效液相-电喷雾串联质谱(HPLC-ESI-Msn)对样品进行系统研究.结果 栀子苷和梓醇在正离子模式下有失去完整葡萄糖和葡萄糖残基两种裂解途径,而在负离子模式下只能失去葡萄糖残基.此外,由于取代基的作用栀子苷在正离子模式下的碎片离子较为丰富,而梓醇的碎片离子则在负离子模式下比较多.结论 该质谱检测方法可以为这类环烯醚萜化合物的快速鉴定提供参考.  相似文献   

9.
豚鼠吸入空气负离子后,进行组织胺引喘实验。结果表明,空气负离子吸入疗法对豚鼠实验性哮喘有一定的抑喘作用。观察持续吸入空气负离子30日的豚鼠气道上皮,未见纤毛上皮损伤。豚鼠吸入空气负离子后血浆皮质醇浓度有某些变化,全血5-羟色胺浓度无显著改变。  相似文献   

10.
目的 利用电喷雾电离技术对荭草苷、牡荆苷及葛根素结构和质谱裂解规律进行研究。方法 用电喷雾串联质谱(ESI-MS)对该类化合物进行研究,并分别在正离子和负离子扫描模式下对其主要特征碎片离子进行解析。结果 正离子扫描模式下,主要通过糖苷键断裂而发生裂解;负离子扫描模式下,主要产生脱去m/z120、149的碎片峰。结论 确立了碳苷类化合物的主要裂解规律,为该类化合物的快速检测提供一种有效的质谱学方法。  相似文献   

11.
INTRODUCTION Epidemiologic researches during the past 10-20 years confirmed that exposure to air pollution contributes to both mortality and morbidity in China or worldwide. The health consequences associated with air pollution include respiratory symptom…  相似文献   

12.
Objective To investigate the potential impact of ambient air pollution on public health under various traffic policies in Shanghai. Methods The exposure level of Shanghai residents to air pollution under various planned traffic scenarios was estimated, and the public health impact was assessed using concentration-response functions derived from available epidemiological studies. Results Our results showed that ambient air pollution in relation to traffic scenarios had a significant impact on the future health status of Shanghai residents. Compared with the base case scenario, implementation of various traffic scenarios could prevent 759-1574, 1885-2420, and 2277-2650 PM10-related avoidable deaths (mean-value) in 2010, 2015, and 2020, respectively. It could also decrease the incidence of several relevant diseases. Conclusion Our findings emphasize the need to consider air pollution-related health effects as an important impact of traffic policy in Shanghai.  相似文献   

13.
Objective To investigate the relation between air pollution exposure and preterm birth in Shanghai, China. Methods We examined the effect of ambient air pollution on preterm birth using time-series approach in Shanghai in 2004. This method can eliminate potential confounding by individual risk factors that do not change over a short period of time. Daily numbers of preterm births were obtained from the live birth database maintained by Shanghai Municipal Center of Disease Control and Prevention. We used the generalized additive model (GAM) with penalized splines to analyze the relation between preterm birth, air pollution, and covariates. Results We observed a significant effect of outdoor air pollution only with 8-week exposure before preterm births. An increase of 10 μg/m3 of 8-week average PM10, SO2, NO2, and O3 corresponded to 4.42% (95%CI 1.60%, 7.25%), 11.89% (95%CI 6.69%, 17.09%), 5.43% (95%CI 1.78%, 9.08%), and 4.63% (95%CI 0.35%, 8.91%) increase of preterm birth. We did not find any significant acute effect of outdoor air pollution on preterm birth in the week before birth. Conclusion Ambient air pollution may contribute to the risk of preterm birth in Shanghai. Our analyses also strengthen the rationale for further limiting air pollution level in the city.  相似文献   

14.
Objective To study the relationship between ambient air pollution and daily mortality of SARS in Beijing. Methods The approach of time-series Poisson regression was used to assess the relationship between daily SARS mortality, ambient air pollution, and other factors from April 25 to May 31, 2003 in Beijing. Results An increase of each 10 μg/m3 over a 5-day moving average of PM10, SO2 and NO2 corresponded to 1.06 (1.00-1.12), 0.74 (0.48-1.13) and 1.22 (1.01-1.48) relative risks(RRs) of daily SARS mortality, respectively, The relative risks (RRs) values depended largely on the selection of lag days.Conclusion The daily mortality of SARS might be associated with certain air pollutants in Beijing.  相似文献   

15.
ObjectiveIn recent years, many studies have reported that air pollution is a risk factor for type 2 diabetes mellitus (T2DM). The aim of this systematic review and meta-analysis is to summarize the evidence about the association between exposure to air pollution and T2DM in developing countries.MethodsThe databases, including PubMed, EMBASE and Web of Science, were systematically searched for studies published up to 31 March 2022. Studies about the association between air pollution and T2DM prevalence or incidence in developing countries were included. The odds ratio (OR) was used as effect estimate. We synthesized the included studies in the meta-analysis.ResultsWe included 8 cross-sectional studies and 8 cohort studies, all conducted in developing countries. Meta-analysis of 8 studies on PM2.5 (particulate matter ≤ 2.5 µm in diameter) showed that T2DM prevalence was significantly associated with PM2.5 exposure (OR=1. 12; 95% CI: 1.07, 1.17; P<0.001). The association between air pollutants and T2DM incidence was not estimated due to the limited relevant studies.ConclusionsThe exposure to PM2.5 would be positively associated with an increased prevalence of T2DM in developing countries. Some effective measures should be taken to reduce air pollutant exposure in people who are vulnerable to diabetes.  相似文献   

16.
目的探讨空气污染物暴露对早产的影响。方法选择2007年11月-2010年11月出生的符合研究质量要求的围生儿7320例,早产组3660例,对照组3660例。空气污染数据来源于我市环境保护监测站,包括2007年11月~2010年11月的空气中SO2、NO2、PM10等污染物暴露水平。应用Logistic回归模型。结果与正常对照组比较,早产组孕晚期及孕期空气污染物NO2暴露、孕晚期PM10空气污染物暴露、孕早期及孕晚期SO2暴露差异均有统计学意义(P〈0.05)。结论孕期PM10、S02、NO2等空气污染物的暴露对早产有影响。  相似文献   

17.
我们调查了北京一些高档的空调建筑,包括商业和政府机构办公大楼,测试了主要的室内污染和室内气象参数,如温度、湿度、风速等。测试结果指出,在这些建筑中存在着严重的室内空气质量问题。而且,引起不良室内空气质量的原因不是单一的而是多方面的。因此如何提高室内空气质量,为人们提供健康而舒适的室内环境,是空调设计者的迫切任务。  相似文献   

18.
INTRODUCTION People’s living standard has been raised by a rapid improvement of economy. The residence where people live becomes more beautiful and comfortable. Therefore, great deal of flag, dope and artifical board used in the process of family decoration, resulting in serious indoor air pollution. Formaldehyde, benzene, ammonia are released from the building materials[1]. From a report of Beijing Appraisal Center of Chemistry, the building materials cause severe indoor air pollution…  相似文献   

19.
Objective To investigate the short-term association between outdoor air pollution and outpatient visits for acute bronchitis,which is a rare subject of research in the mainland of China.Methods A time-series analysis was conducted to examine the association of outdoor air pollutants with hospital outpatient visits in Shanghai by using two-year daily data(2010-2011).Results Outdoor air pollution was found to be associated with an increased risk of outpatient visits for acute bronchitis in Shanghai.The effect estimates of air pollutants varied with the lag structures of the concentrations of the pollutants.For lag06,a 10 μg/m3 increase in the concentrations of PM10,SO2,and NO2 corresponded to 0.94%(95% CI:0.83%,1.05%),11.12%(95% CI:10.76%,11.48%),and 4.84%(95% CI:4.49%,5.18%) increases in hospital visits for acute bronchitis,respectively.These associations appeared to be stronger in females(P0.05).Between-age differences were significant for SO2(P0.05),and between-season differences were also significant for SO2(P0.05).Conclusion Our analyses have provided the first evidence that the current air pollution level in China has an effect on acute bronchitis and that the rationale for further limiting air pollution levels in Shanghai should be strengthened.  相似文献   

20.
To obtain the exposure-response functions that could be used in health-based risk assessment of particulate air pollution in China. Methods Meta analysis was conducted on the literatures on air particulate matter and its adverse health outcomes in China and worldwide. Results For each health outcome from morbidity to mortality changes, the relative risks were estimated when the concentration of air particulate matter increased to some certain units. Conclusion The exposure-response functions recommended here can be further applied to health risk assessment of air particulate matter in China.  相似文献   

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