Residential exposure

住宅暴露
  • 文章类型: Journal Article
    背景:烟草烟雾侵入私人住宅(TSI)是许多国家普遍存在的问题。我们试图评估以色列自我报告TSI的患病率和公众对TSI的态度,吸烟率和人口密度相对较高的国家。
    方法:我们在2017年对以色列居民(N=285)进行了随机数字拨号调查,检查了频率,来源,的相关性,以及对TSI的态度和潜在的监管选择。合作率为63.9%。
    结果:在受访者中,44.7%报告曾经经历过家庭TSI,多单元住房(MUH)居民的风险较高(MUH与私人住宅:aOR(调整后赔率比):3.60,CI(置信区间):[1.96,6.58],p<.001)。大多数受访者(69.8%),包括近一半的吸烟者,个人在公寓里呼吸无烟空气的权利优先于吸烟者在公寓里吸烟的权利。女性和非吸烟者更有可能支持呼吸无烟空气的权利(女性与男性:aOR:2.77CI:[1.48,5.16],p=.001;非吸烟者与吸烟者:OR:3.21CI[1.59,6.48],p=.001)。然而,只有约四分之一(24.8%)曾经历过TSI的受访者向吸烟的邻居提出了这个问题,邻居的房东,或者建筑委员会.绝大多数(85.2%)的受访者,包括四分之三的吸烟者,支持多单元住房(MUH)的无烟立法,那些曾经接触过TSI和不吸烟者的人更有可能支持立法(曾经接触过与从未接触过的aOR=2.99,CI[1.28,6.97],p=0.011;不吸烟者与吸烟者的aOR=3.00,CI[1.28,7.01],p=0.011)。
    结论:在研究参与者中,烟草烟雾入侵是常见的,但不受欢迎的经验。大多数受访者认为,在自己的公寓里呼吸无烟空气的权利取代了邻居在家中任何地方吸烟的权利,以及大多数支持的防止TSI的立法。虽然需要进一步的研究来更好地了解TSI及其预防的有效方法,我们的研究结果表明,政策干预,包括最高法院和/或以色列议会一级的法律行动,是需要的。Regulation,在全球范围内,对其他人和私人住宅附近的吸烟进行非规范化的政策举措和运动可以减少这一普遍问题的范围,保护个人免受家庭TSI的侵害,改善人口健康。
    Tobacco smoke incursion (TSI) into private residences is a widespread problem in many countries. We sought to assess the prevalence of self-reported TSI and public attitudes about TSI in Israel, a country with a relatively high smoking prevalence and high population density.
    We conducted a random digit dial survey among residents in Israel (N = 285) in 2017, which examined the frequency, source, correlates of, and attitudes towards TSI and potential regulatory options. The cooperation rate was 63.9%.
    Among respondents, 44.7% reported ever experiencing home TSI, with higher exposure among residents of multi-unit housing (MUH) (MUH versus private homes: aOR (Adjusted Odds Ratio): 3.60, CI (Confidence Interval): [1.96, 6.58], p < .001). Most respondents (69.8%), including nearly half of smokers, prioritized the right of individuals to breath smoke-free air in their apartments over the right of smokers to smoke in their apartments. Women and non-smokers were more likely to support the right to breathe smoke-free air (Women versus men: aOR: 2.77 CI: [1.48, 5.16], p = .001; Nonsmokers versus smokers: aOR: 3.21 CI [1.59, 6.48], p = .001). However, only about a quarter (24.8%) of respondents who ever experienced TSI raised the issue with the neighbor who smoked, the neighbor\'s landlord, or the building committee. The vast majority (85.2%) of all respondents, including three-quarters of smokers, supported smoke-free legislation for multi-unit housing (MUH), with those ever-exposed to TSI and non-smokers more likely to support legislation (ever-exposed versus never-exposed aOR = 2.99, CI [1.28, 6.97], p = 0.011; nonsmokers versus smokers aOR = 3.00, CI [1.28, 7.01], p = 0.011).
    Among study participants, tobacco smoke incursion was a common, yet unwelcome experience. Most respondents believed that the right to breathe smoke-free air in one\'s apartment superseded that of neighbors to smoke anywhere in their home, and most supported legislation to prevent TSI. Though further study is needed to understand better TSI and effective methods for its prevention, our findings suggest that policy interventions, including legal action at the level of the Supreme Court and/or the Knesset, are needed. Regulation, policy initiatives and campaigns to denormalize smoking in proximity to other people and private residences globally could reduce the scope of this widespread problem, protect individuals from home TSI, and improve population health.
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  • 文章类型: Journal Article
    目的:除家族史和吸烟外,外分泌型胰腺癌(EPC)的病因尚不清楚。尽管最近的医学进步,胰腺癌的发病率和死亡率正在上升。尽管现有证据表明环境化学物质暴露与胰腺癌之间存在潜在的因果关系,住宅暴露是否会影响胰腺癌的发病率尚不清楚.
    方法:作者在1996-2013年间确定了纽约州不包括纽约市的28941例诊断为外分泌胰腺癌的患者。在这项生态研究中使用了描述性统计和负二项回归,以比较居住在含有持久性有机污染物(POPs)和挥发性有机污染物(VOCs)的邮政编码危险废物场所(HWS)的患者中的胰腺癌住院率。作者通过亚组分析评估了选定的已知和可疑人类致癌物对EPC住院率的影响。
    结果:与干净的场地相比,胰腺癌医院出院率在“无POPs的VOCs”和“VOCs和POPs”网站,在对潜在混杂因素进行调整后,分别为1.06(95%CI:1.03-1.09)和1.05(95%CI:1.01-1.08),分别。在特定化学物质的分析中,非氯化VOCs组中苯(RR=1.12)和乙苯(RR=1.34)的速率比(RR),氯化VOCs组中的三氯乙烯(RR=1.07)和四氯乙烯(RR=1.11),与清洁场所相比,POPs组的氯化农药(RR=1.11)和多氯联苯(RR=1.05)具有统计学意义(p值<0.05)。
    结论:与清洁场所相比,胰腺癌医院出院率在“无POPs的VOCs”和“VOCs和POPs”网站,在对潜在混杂因素进行调整后,分别为1.06(95%CI:1.03-1.09)和1.05(95%CI:1.01-1.08),分别。在特定化学物质的分析中,非氯化VOCs组中苯(RR=1.12)和乙苯(RR=1.34)的速率比(RR),氯化VOCs组中的三氯乙烯(RR=1.07)和四氯乙烯(RR=1.11),与清洁场所相比,POPs组的氯化农药(RR=1.11)和多氯联苯(RR=1.05)具有统计学意义(p值<0.05)。IntJOccupMedEnvironHealth。2022年;35(4):459-71。
    OBJECTIVE: The etiology of exocrine pancreatic cancer (EPC) remains unknown except for family history and smoking. Despite recent medical advances, rates of pancreatic cancer incidence and mortality are increasing. Although existing evidence suggests a potentially causal relationship between environmental chemical exposures and pancreatic cancer, whether residential exposure impacts pancreatic cancer rates remains unknown.
    METHODS: The authors identified 28 941 patients diagnosed with exocrine pancreatic cancer in New York State exclusive of New York City for the years 1996-2013. Descriptive statistics and negative binomial regression were used in this ecological study to compare pancreatic cancer hospitalization rates among patients who lived in zip codes with hazardous waste sites (HWSs) containing persistent organic pollutants (POPs) and volatile organic pollutants (VOCs) compared with clean zip codes with no identified hazardous waste sites. The authors assessed the effect of selected known and suspected human carcinogens on the EPC hospitalization rates by subgroup analyses.
    RESULTS: Compared with the clean sites, the pancreatic cancer hospital discharge rate in the \"VOCs without POPs\" and \"VOCs and POPs\" sites, after adjustment for potential confounders were 1.06 (95% CI: 1.03-1.09) and 1.05 (95% CI: 1.01-1.08), respectively. In the analysis by specific chemicals, rate ratios (RR) for the benzene (RR = 1.12) and ethylbenzene (RR = 1.34) in the non-chlorinated VOCs group, trichloroethylene (RR = 1.07) and tetrachloroethylene (RR = 1.11) in the chlorinated VOCs group, chlorinated pesticides (RR = 1.11) and PCBs (RR = 1.05) in the POPs groups were statistically significant (p-values <0.05) compared with clean sites.
    CONCLUSIONS: Compared with the clean sites, the pancreatic cancer hospital discharge rate in the \"VOCs without POPs\" and \"VOCs and POPs\" sites, after adjustment for potential confounders were 1.06 (95% CI: 1.03-1.09) and 1.05 (95% CI: 1.01-1.08), respectively. In the analysis by specific chemicals, rate ratios (RR) for the benzene (RR = 1.12) and ethylbenzene (RR = 1.34) in the non-chlorinated VOCs group, trichloroethylene (RR = 1.07) and tetrachloroethylene (RR = 1.11) in the chlorinated VOCs group, chlorinated pesticides (RR = 1.11) and PCBs (RR = 1.05) in the POPs groups were statistically significant (p-values <0.05) compared with clean sites. Int J Occup Med Environ Health. 2022;35(4):459-71.
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  • 文章类型: Journal Article
    棕地是许多废弃和废弃的地方,跨越许多以前的目的。对于许多美国人来说,棕地代表了一种异质但无处不在的暴露,可能含有危险废物,代表城市疫病。新生儿和孕妇通常对微妙的环境暴露敏感。我们评估住宅棕地暴露是否与出生缺陷有关。
    使用2003年至2015年的北卡罗来纳州出生记录,我们对753,195例新生儿进行了抽样,发现了39,495例缺陷。我们检查了缺陷组和30种不同的表型。出生时居住地址2,000m内的棕地数量已汇总。我们利用了混合效应多变量逻辑回归模型,对出生记录中的人口和环境协变量进行了调整,2010年人口普查,和EPA的环境质量指数来估计比值比(OR)和95%置信区间(CI)。
    我们观察到心血管和外部缺陷组之间的正相关(OR[95%CI]:1.07[1.02-1.13]和1.17[1.01-1.35],分别)和任何棕地暴露。我们还观察到与房间隔和室间隔缺损呈正相关(1.08[1.01-1.16]和1.15[1.03-1.28],分别),先天性白内障(1.38[0.98-1.96]),与腹裂呈负相关(0.74[0.58-0.94])。对几个额外缺陷的效果估计是积极的,尽管我们观察到大多数群体和个体缺陷的零关联。其他分析表明,在棕场暴露水平上,几种缺陷的暴露-响应关系。
    我们的结果表明,靠近棕地的住宅与出生缺陷有关,尤其是心血管和外部缺陷。对单个缺陷和特定污染物或棕地位点的深入分析可能会揭示其他新的关联。
    Brownfields are a multitude of abandoned and disused sites, spanning many former purposes. Brownfields represent a heterogenous yet ubiquitous exposure for many Americans, which may contain hazardous wastes and represent urban blight. Neonates and pregnant individuals are often sensitive to subtle environmental exposures. We evaluate whether residential brownfield exposure is associated with birth defects.
    Using North Carolina birth records from 2003 to 2015, we sampled 753,195 births with 39,495 defects identified. We examined defect groups and 30 distinct phenotypes. Number of brownfields within 2,000 m of the residential address at birth was summed. We utilized mixed effects multivariable logistic regression models adjusted for demographic and environmental covariates available from birth records, 2010 Census, and EPA\'s Environmental Quality Index to estimate odds ratios (OR) and 95% confidence intervals (CI).
    We observed positive associations between cardiovascular and external defect groups (OR [95% CI]: 1.07 [1.02-1.13] and 1.17 [1.01-1.35], respectively) and any brownfield exposure. We also observed positive associations with atrial septal and ventricular septal defects (1.08 [1.01-1.16] and 1.15 [1.03-1.28], respectively), congenital cataracts (1.38 [0.98-1.96]), and an inverse association with gastroschisis (0.74 [0.58-0.94]). Effect estimates for several additional defects were positive, though we observed null associations for most group and individual defects. Additional analyses indicated an exposure-response relationship for several defects across levels of brownfield exposure.
    Our results indicate that residential proximity to brownfields is associated with birth defects, especially cardiovascular and external defects. In-depth analyses of individual defects and specific contaminants or brownfield sites may reveal additional novel associations.
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  • 文章类型: Journal Article
    进行系统审查,以评估住宅或职业短期和长期暴露于工业来源的气味污染与暴露人群的健康状况之间的关系。
    搜索是在Medline进行的,EMBASE和Scopus在2021年4月。考虑了在源附近居住的人口或工人中暴露于来自工业源的环境气味。我们考虑了有生物学合理性的结果,比如喘息和哮喘,咳嗽,头痛,恶心和呕吐(主要结果)。我们还包括与压力相关的症状和新结果(例如情绪状态)。使用OHAT工具评估偏倚风险。对于主要结果,当至少有3项研究通过比较暴露受试者和未暴露受试者提供效果估计时,我们使用随机效应模型汇总了研究特有的气味相关效应估计值.用HigginsI2评估异质性。
    30项研究符合本次审查的条件,主要是横截面(n=23)。只有一项研究涉及学龄儿童,两项研究涉及工人。只有五项研究报告了气味对客观实验室或临床结果的影响。动物饲养操作和废物是最常见的工业来源。暴露人群与未暴露人群的总体优势比为1.15(95%CI1.01至1.29)(7项研究),恶心/呕吐为1.09(95%CI0.88至1.30)(7项研究),咳嗽/痰为1.27(95%CI1.10至1.44)(5项研究)。异质性是一个适度的问题。总的来说,由于大多数研究使用的是自我报告的信息,因此在暴露和结局评估方面,证据体受到绝对高偏倚风险的影响.
    研究结果强调了气味污染对居住在工业气味来源附近的人群的公共卫生重要性。大多数结果的有限证据支持需要对气味污染及其对人类健康的影响之间的关联进行高质量的流行病学研究。
    To conduct a systematic review to evaluate the association between residential or occupational short- and long-term exposure to odour pollution from industrial sources and the health status of the exposed population.
    The searches were conducted in Medline, EMBASE and Scopus in April 2021. Exposure to an environmental odour from industrial sources in population resident near the source or in workers was considered. We considered outcomes for which there was a biological plausibility, such as wheezing and asthma, cough, headache, nausea and vomiting (primary outcomes). We also included stress-related symptoms and novel outcomes (e.g. mood states). Risk of bias was evaluated using the OHAT tool. For primary outcomes, when at least 3 studies provided effect estimates by comparing exposed subjects versus not exposed, we pooled the study-specific estimates of odour-related effect using random effects models. Heterogeneity was evaluated with Higgins I2.
    Thirty studies were eligible for this review, mainly cross-sectional (n = 23). Only one study involved school-age children and two studies involved workers. Only five studies reported odour effects on objective laboratory or clinical outcomes. Animal Feeding Operations and waste were the most common industrial sources. The overall odds ratios in exposed versus not exposed population were 1.15 (95% CI 1.01 to 1.29) for headache (7 studies), 1.09 (95% CI 0.88 to 1.30) for nausea/vomiting (7 studies), and 1.27 (95% CI 1.10 to 1.44) for cough/phlegm (5 studies). Heterogeneity was a moderate concern. Overall, the body of evidence was affected by a definitely high risk of bias in exposure and outcome assessment since most studies used self-reported information.
    Findings underline the public health importance of odour pollution for population living nearby industrial odour sources. The limited evidence for most outcomes supports the need for high quality epidemiological studies on the association between odour pollution and its effects on human health.
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  • 文章类型: Journal Article
    Understanding potential health risks associated with biofuel production is critical to sustainably combating energy insecurity and climate change. However, the specific health impacts associated with biorefinery-related emissions are not yet well characterized. We evaluated the relationship between respiratory emergency department (ED) visits (2011-2015) and residential exposure to biorefineries by comparing 15 biorefinery sites to 15 control areas across New York (NY) State. We further examined these associations by biorefinery types (e.g., corn, wood, or soybean), seasons, and lower respiratory disease subtypes. We measured biorefinery exposure using residential proximity in a cross-sectional study and estimation of biorefinery emission via AERMOD-simulated modeling. After controlling for multiple confounders, we consistently found that respiratory ED visit rates among residents living within 10 km of biorefineries were significantly higher (rate ratios (RRs) range from 1.03 to 3.64) than those in control areas across our two types of exposure indices. This relationship held across biorefinery types (higher in corn and soybean biorefineries), seasons (higher in spring and winter), air pollutant types (highest for NO2), and respiratory subtypes (highest for emphysema). Further research is needed to confirm our findings.
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  • 文章类型: Journal Article
    进行了一项全面的研究,以测量马什哈德市78所住宅的室内氡/氡浓度和土壤气氡,伊朗在两个季节,使用两种常见的氡监测装置(NRPB和RADUET)。在冬天,室内氡浓度在75±11至376±24Bq·m-3之间(平均值:150±19Bqm-3),而室内胸部浓度范围从低于检测下限(LLD)到166±10Bq·m-3(平均值:66±8Bqm-3),而夏季的the和thon浓度在50±11和305±24Bq·m-3之间(平均115±18Bqm-3),从LLD以下下降到122±10Bqm-3(平均48±6Bq·m-3),分别。年平均有效剂量估计为3.7±0.5mSvyr-1。土壤气氡浓度在1.07±0.28至8.02±0.65kBq·m-3(平均3.07±1.09kBq·m-3)范围内。最后,ArcGIS软件使用三种不同的插值技术在1×1km2的网格上生成室内the图。在没有观察到数据的网格单元中,算术平均值用于预测室内平均氡浓度。因此,由于平均绝对误差(MAE)和均方根误差(RMSE)较低,距离倒数加权(IDW)被证明更适合预测室内平均氡浓度。同时,还评估了由于住宅暴露于氡和室内γ辐射暴露而导致的辐射健康风险。
    A comprehensive study was carried out to measure indoor radon/thoron concentrations in 78 dwellings and soil-gas radon in the city of Mashhad, Iran during two seasons, using two common radon monitoring devices (NRPB and RADUET). In the winter, indoor radon concentrations measured between 75 ± 11 to 376 ± 24 Bq·m-3 (mean: 150 ± 19 Bq m-3), whereas indoor thoron concentrations ranged from below the Lower Limit of Detection (LLD) to 166 ± 10 Bq·m-3 (mean: 66 ± 8 Bq m-3), while radon and thoron concentrations in summer fell between 50 ± 11 and 305 ± 24 Bq·m-3 (mean 115 ± 18 Bq m-3) and from below the LLD to 122 ± 10 Bq m-3 (mean 48 ± 6 Bq·m-3), respectively. The annual average effective dose was estimated to be 3.7 ± 0.5 mSv yr-1. The soil-gas radon concentrations fell within the range from 1.07 ± 0.28 to 8.02 ± 0.65 kBq·m-3 (mean 3.07 ± 1.09 kBq·m-3). Finally, indoor radon maps were generated by ArcGIS software over a grid of 1 × 1 km2 using three different interpolation techniques. In grid cells where no data was observed, the arithmetic mean was used to predict a mean indoor radon concentration. Accordingly, inverse distance weighting (IDW) was proven to be more suitable for predicting mean indoor radon concentrations due to the lower mean absolute error (MAE) and root mean square error (RMSE). Meanwhile, the radiation health risk due to the residential exposure to radon and indoor gamma radiation exposure was also assessed.
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  • 文章类型: Journal Article
    (1) Background: There is increasing awareness that the quality of the indoor environment affects our health and well-being. Indoor air quality (IAQ) in particular has an impact on multiple health outcomes, including respiratory and cardiovascular illness, allergic symptoms, cancers, and premature mortality. (2) Methods: We carried out a global systematic literature review on indoor exposure to selected air pollutants associated with adverse health effects, and related household characteristics, seasonal influences and occupancy patterns. We screened records from six bibliographic databases: ABI/INFORM, Environment Abstracts, Pollution Abstracts, PubMed, ProQuest Biological and Health Professional, and Scopus. (3) Results: Information on indoor exposure levels and determinants, emission sources, and associated health effects was extracted from 141 studies from 29 countries. The most-studied pollutants were particulate matter (PM2.5 and PM10); nitrogen dioxide (NO2); volatile organic compounds (VOCs) including benzene, toluene, xylenes and formaldehyde; and polycyclic aromatic hydrocarbons (PAHs) including naphthalene. Identified indoor PM2.5 sources include smoking, cooking, heating, use of incense, candles, and insecticides, while cleaning, housework, presence of pets and movement of people were the main sources of coarse particles. Outdoor air is a major PM2.5 source in rooms with natural ventilation in roadside households. Major sources of NO2 indoors are unvented gas heaters and cookers. Predictors of indoor NO2 are ventilation, season, and outdoor NO2 levels. VOCs are emitted from a wide range of indoor and outdoor sources, including smoking, solvent use, renovations, and household products. Formaldehyde levels are higher in newer houses and in the presence of new furniture, while PAH levels are higher in smoking households. High indoor particulate matter, NO2 and VOC levels were typically associated with respiratory symptoms, particularly asthma symptoms in children. (4) Conclusions: Household characteristics and occupant activities play a large role in indoor exposure, particularly cigarette smoking for PM2.5, gas appliances for NO2, and household products for VOCs and PAHs. Home location near high-traffic-density roads, redecoration, and small house size contribute to high indoor air pollution. In most studies, air exchange rates are negatively associated with indoor air pollution. These findings can inform interventions aiming to improve IAQ in residential properties in a variety of settings.
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  • 文章类型: Journal Article
    Background and objectives: Many studies have been carried out on the negative health effects of exposure to PM10, PM 2.5, NO2, CO, SO2 and B[a]P for small populations. The main purpose of this study was to explore the association of air pollution to diagnosis of asthma for the whole huge population of school children between 7-17 years in Vilnius (Lithuania) using geographical information system analysis tools. Material and Methods: In the research, a child population of 51,235 individuals was involved. From this large database, we identified children who had asthma diagnosis J45 (ICD-10 AM). Residential pollution concentrations and proximity to roads and green spaces were obtained using the ArcGIS spatial analysis tool from simulated air pollution maps. Multiple stepwise logistic regression was used to explore the relation between air pollution concentration and proximity between the roads and green spaces where children with asthma were living. Further, we explored the interaction between variables. Results: From 51,235 school children aged 7-17 years, 3065 children had asthma in 2017. We investigated significant associations, such as the likelihood of getting sick with age (odds ratio (OR) = 0.949, p < 0.001), gender (OR = 1.357, p = 0.003), NO2 (OR = 1.013, p = 0.019), distance from the green spaces (OR = 1.327, p = 0.013) and interactions of age × gender (OR = 1.024, p = 0.051). The influence of gender on disease is partly explained by different age dependency slopes for boys and girls. Conclusions: According to our results, younger children are more likely to get sick, more cases appended on the lowest age group from 7 to 10 years (almost half cases (49.2%)) and asthma was respectively nearly twice more common in boys (64.1%) than in girls (35.9%). The risk of asthma is related to a higher concentration of NO2 and residence proximity to green spaces.
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  • 文章类型: Journal Article
    为了便于直接检测氡的生物效应,我们设计并建造了一个3.1立方米的氡室,专门用于小动物的氡暴露。该室设计为密封外壳,具有受控气氛,包含已知浓度的氡及其放射性衰变产物。空气流速传感器,温度,湿度,湿度HEPA过滤器和压差确保暴露对象的最佳环境。氡气从含有在稀酸溶液中的镭-226的发生器供应到腔室。含氡的空气可以使用恒定的流速连续泵送以保持稳定的状态供应。分配源流速以实现200Bq/m3(R2=0.9341)或1000Bq/m3(R2=0.9715)的室浓度。通过颗粒发生器将小颗粒注入再循环空气流中,以在氡衰变产物在室气氛中形成时提供用于附着氡衰变产物的凝聚核。在0.3μm处测得的颗粒,0.5μm和5.0μm的平均浓度分别为5.7±0.6×107/m3,2.5±0.7×107/m3和2.3±2.4×103/m3。通过改变通过腔室的空气循环速率,可以容易地实现期望的平衡因子。平衡因子在200Bq/m3时为0.4至0.8,在1000Bq/m3时为0.5至0.6。该室旨在进行短期暴露,以评估氡暴露引起的急性细胞变化。据我们所知,这是目前唯一专门设计用于研究小型动物模型中与环境相关的氡气体和衰变产物的暴露时间和剂量的氡室。
    In order to facilitate direct testing of the biological effects of radon, we designed and constructed a 3.1 m3 radon chamber specifically for radon exposures to small animals. The chamber is designed to operate as a sealed enclosure with a controlled atmosphere containing a known concentration of radon and its radioactive decay products. Sensors for air flow rate, temperature, humidity, HEPA filter and differential pressure ensure an optimal environment for exposure subjects. The radon gas is supplied to the chamber from a generator containing Radium-226 in a dilute acid solution. Air containing radon can be pumped continuously using a constant flow rate to maintain a steady state supply. The source flow rate was partitioned to achieve a chamber concentration at 200 Bq/m3 (R2 = 0.9341) or 1000 Bq/m3 (R2 = 0.9715). Small particles are injected into the re-circulating air stream via a particle generator to provide condensation nuclei for attachment of radon decay products as they form in the chamber atmosphere. Particles measured at 0.3 μm, 0.5 μm and 5.0 μm averaged concentrations 5.7 ± 0.6 × 107/m3, 2.5 ± 0.7 × 107/m3 and 2.3 ± 2.4 × 103/m3, respectively. A desired Equilibrium Factor can easily be achieved by varying the air circulation rate through the chamber. The Equilibrium Factor ranged from 0.4 to 0.8 at 200 Bq/m3 and 0.5 to0.6 at 1000 Bq/m3. The chamber was designed to conduct short term exposures to assess the acute cellular changes induced by radon exposure. To our knowledge, this is currently the only radon chamber designed specifically to investigate environmentally relevant exposure time and doses of radon gas and decay products in small animal models.
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  • 文章类型: Journal Article
    Exposure of the general population to pesticides, especially in agricultural areas, is a major public health concern. This review analyses the role of Land Use and Land Cover (LULC) in Residential Exposure to Agricultural Pesticides (REAP) and how it is measured and modelled. Some epidemiological studies have shown that basic LULC variables, such as distance to a crop and field size, are relevant for explaining REAP. However, the potential of LULC mitigation elements, such as vegetation barriers, grassy strips and buffer zones, to mitigate REAP has been poorly studied. The availability of recent low-cost and high-quality geospatial data enables REAP models to include alternative and more precise LULC variables. This review also highlights the need for (i) generic environmental sampling protocols, (ii) exposure and spraying datasets and (iii) assessment of the mitigation capacity of LULC to improve REAP modelling significantly.
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