检索结果-南通市图书馆

Study of Trace Ions in Wet Deposition of an Industrial Site in Monterrey’s Metropolitan Area, Mexico

Open Journal of Ecology 2016年第1期6卷 1-12页

作者： evangelina Ramírez-lara Rosa María Cerón-Bretón Julia Griselda Cerón-Bretón Ulrico López-Chuken Jonathan Kahl Facultad de Ciencias Químicas Universidad Autónoma de Nuevo León San Nicolás de los Garza México Facultad de Química Universidad Autónoma del Carmen Ciudad del Carmen México Department of Mathematical Science University of Wisconsin-Milwaukee Milwaukee USA

The chemistry of rainwater has been subject to numerous investigations during the last two decades due to the increase of environmental problems caused by the acid deposition. The present study focuses on one aspect of air pollution, the chemical composition of wet deposition of an industrial zone. The sampling period was from March to December 2009. The station was located on the roof of the Chemistry School at the University of Nuevo León, an area in the north of Monterrey where the majority of pollution is generated. Twenty-five wet precipitation samples were collected with an automatic sampler and analyzed for pH, ions (, , Cl-, Ca2+, Mg2+, Na+, K+) and conductivity. The results show that the average pH is higher than 5.6;the characteristics of the rainwater studied are of alkaline nature due to the values of pH found;there is an evident anthropogenic source contributing to the alkaline of rain water. In order to find possible association between ions and consequently the possible sources of pollutants correlation study was applied using the program SPSS v.12. Good correlations were found between ions and along with Ca2+ and Mg2+. The local extraction industry and surrounding aerosols might be causing of alkaline rain which may be due to the neutralization effect of particulate matter. This study represents a continuation of the studies of rainwater chemistry in the Northeast of Mexico.

关键词： Wet Deposition Air Quality Monterrey Air Pollution

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wet Deposition Fluxes and Related Atmospheric Chemistry at Three Sites in Mexico

引用

Open Journal of Air Pollution 2014年第1期3卷 1-9页

作者： Rosa María Cerón Bretón Julia Griselda Cerón Bretón Claudia Alejandra Aguilar Ucán evangelina Ramírez lara José Abraham Ortínez álvarez Carlos Montalvo Romero Carmen Guadalupe Carballo Pat Chemistry Department Autonomous University of Nuevo Leon San Nicolás de los Garza Mexico National Center for Training and Environmental Research National Institute of Ecology Mexico City Mexico Research Center on Environmental Sciences Autonomous University of Carmen Botanical Garden Carmen City Mexico

Wet deposition was collected in Mexico City (MC), Metropolitan Area of Monterrey (MAM) and El Chico National Park (ECNP), during 2009 and 2010. pH, conductivity, Cl-, , Na+, K+, Ca2+ and Mg2+ were determined. In MC, sulphate levels were greater than nitrate levels, and NH4 had mixed sources (vehicular emissions and agriculture activities). MAM had markedly alkaline atmospheric deposition, Na+ and Cl-levels were unexpectedly high, especially during hurricane “Alex”. Low pH values were found in ECNP and nitrate concentrations were high, suggesting the influence of a local source (forest fires). Deposition fluxes (***-1yr-1) for N-NO3, N-NH4 and S-SO4 were 1.36, 2.74 and 4.84 for MAM;7.27, 0.57 and 4.32 for ECNP;and 5.97, 4.96 and 6.78 for MC, respectively. Nitrogen deposition fluxes in ECNP were high considering that this site is a natural reserve.

关键词： Acid Deposition Mexican Atmospheric Deposition Network Mexico Wet Deposition Wet Deposition Fluxes

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Quality of Life in Women with Endometriosis Pelvic Pain Treated with the Levonorgestrel-Releasing Intrauterine System

引用

Open Journal of Obstetrics and Gynecology 2015年第3期5卷 167-172页

作者： René Cortés Flores evangelina brio.es lara Luis Carlos Quintana Corral Ricardo Alberto Isacc Chaib Luis Oswaldo de la O. Pérez Oscar Armando González Díaz Raúl Cortés Flores Obstetrics and Gynecology Hospital UMAE 23 “Dr. Ignacio Morones Prieto” Mexican Institute of Social Security Monterrey Mexico

Objective: To evaluate the quality of life in patients with endometriosis pelvic pain before and after the application of the levonorgestrel-releasing intrauterine system (LNG-IUS). Design: Open non-comparative study. Setting: Obstetrics and Gynecology Hospital at Monterrey, Mexico. Sample: 29 women aged 18 to 40 years with pelvic pain associated with endometriosis confirmed by laparoscopy. Methods: After laparoscopy but before LNG-IUS insertion (basal visit) and 6 months afterwards, modified Endometriosis Health Profile (EHP-30) was applied. Main outcomes measures: Size of change of questionnaire scores, need of additional analgesic therapy and adverse effects. Statistical Analysis: Differences in the questionnaire scores before and after intervention were analyzed by Student t-test. Results: Final analysis set included 29 women aged 31.7 ± 4.7 years years. The ASRM surgical staging of endometriosis was mild in 19.3 moderate in 13.7 and severe in 76% of the patients. The general perception of quality of life improved from 52 at baseline to 98% at six months (p esics for relief of pain. Conclusion: The application of LNG-IUS in patients with pelvic pain associated with endometriosis improved significatively all aspects related with quality of life as measured with Endometriosis Health Profile (EHP-30). We concluded that LNGIUS may be an effective and convenient therapeutic alternative for the management of pain associated with endometriosis.

关键词： Quality of Life Endometriosis Chronic Pelvic Pain Levonorgestrel-Releasing Intrauterine System LNG-IUS EPH-30 Questionnaires

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：