Nitrate and nitrite content of well water in Enugu, Southeast Nigeria.(Brief Communication)

From: Archives of Environmental Health | Date: September 1, 2003| Author: Echebiri, Vitalis C.; Ogbu, Innocent S.I. | Copyright information

Water samples from 20 artesian wells, chosen by the multistage sampling procedure from 5 zones in the city of Enugu, Southeast Nigeria, were analyzed by the disulfonic acid method in duplicate for the presence of nitrate (N[O.sub.3]) and nitrite (N[O.sub.2]). The zonal mean values for N[O.sub.3] were 0.45 mmol/l, 0.46 mmol/l, 0.55 mmol/l, 0.59 mmol/l, and 0.65 mmol/l (mean = 0.54 mmol/l), and for NO2 the values were 0.34 mmol/l], 0.32 mmol/l, 0.21 mmol/l, 0.14 mmol/l, and 0.20 mmol/l (mean ...

Related newspaper, magazine, and journal articles from HighBeam Research

Industry Influence on Occupational and Environmental Public Health
International Journal of Occupational and Environmental Health ; ... of interest and bias. Environ Health Perspect. 2006;114:A147-8. Sass J, Solomon G. Inappropriate influence by industry on EHP news article. Environ Health Perspect. 2005;113:A87-8. Sass J. U.S. Department of Defense and White House working together to avoid ...
Corrections.(Correspondence)(Correction Notice)
Environmental Health Perspectives ; The November 2003 Forum article New Data on Methylmercury and Fetuses [Environ Health Perspect 111:A753 (2003)] incorrectly stated, in reference to methylmercury poisoning at Minamata Bay in the mid-1950s, The hair mercury of pregnant women in Minamata ranged from 25 to 50 ppm. In fact, there are
Errata.(Correction Notice)
Environmental Health Perspectives ; In the October articles Children's Centers Study Kids and Chemicals [Environ Health Perspect 113:A664-A668 (2005)] and Are EDCs Blurring Issues of Gender? [Environ Health Perspect 113:A670-A677 (2005 photographs and their captions erroneously imply that plastic drink bottles contain
Study on failures to disclose conflicts of interest in Environmental Health Perspectives.(Perspectives / Correspondence)
Environmental Health Perspectives ; The Center for Science in the Public Interest (CSPI) recently investigated conflict of interest disclosures in a cross-section of leading scientific and medical journals, including EHP, to determine adherence to their own policies. EHP's conflict of interest disclosure policy (EHP 2003) outlines a
Benzene-induced Cancers: Abridged History and Occupational Health Impact
International Journal of Occupational and Environmental Health ; Benzene-induced cancer in humans was first reported in the late 1920s. Carcinogenesis findings in animals were not reported conclusively until 1979. Industry exploited this "discrepancy" to discredit the use of animal bioassays as surrogates for human exposure experience. The cardinal reason for
Biomonitoring of exposure in farmworker studies.(Mini-Monograph)
Environmental Health Perspectives ; Although biomonitoring has been used in many occupational and environmental health and exposure studies, we are only beginning to understand the complexities and uncertainties involved with the biomonitoring process--from study design, to sample collection, to chemical analysis--and with
Misconceptions about the Causes of Cancer
International Journal of Occupational and Environmental Health ; ... et al. re-publish their nine "misconceptions" multiple times in multiple places-in science sinks and lay publications and the news media. We have addressed each of these individually in some depth.2 For none of their misconception construals and denials do ...
Assessing the effects of endocrine disruptors in the National Children's Study.(Endocrine disruptors: mini-monograph)
Environmental Health Perspectives ; Children are uniquely vulnerable to toxic chemicals in the environment. Among the environmental toxicants to which children are at risk of exposure are endocrine disruptors (EDschemicals that have the capacity to interfere with hormonal signaling systems. EDs may alter feedback loops in the brain,
An approach to assessment of endocrine disruption in the National Children's Study.(Endocrine disruptors: mini-monograph)
Environmental Health Perspectives ; In this article we consider the importance of assessing endocrine disruption in a large new cohort that has been proposed, the National Children's Study (NCS). We briefly review evidence that endocrine disruption is a potentially important hypothesis for human studies and weigh the need to assess
European Union Bans Atrazine, While the United States Negotiates Continued Use
International Journal of Occupational and Environmental Health ; Atrazine is a common agricultural herbicide with endocrine disruptor activity. There is evidence that it interferes with reproduction and development, and may cause cancer. Although the U.S. Environmental Protection Agency (EPA) approved its continued use in October 2003, that same month the