John Jay

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Nobody grow old by merely living a number of years, people grow old by deserting their ideas. I live, I Learn.
Phone: 07069491138
Address: Suite A106, Garki Mall, Kabo Crescent Abuja.

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Richard Tabor Greene

PUT

Filippo Salustri

Toronto Metropolitan University

B. Harun Küçük

University of Pennsylvania

Armando Marques-Guedes

UNL - New University of Lisbon

Giampaolo Salice

Università degli Studi di Cagliari

naveen noronha

Visvesvaraya Technological University

Mikail F Lumentut

National Taiwan University

Georgina Kalogeridou

University of Cambridge

Md. Alamgir Bhuyan

International University Of Business Agriculture and Technology(IUBAT)

Iain Staffell

Imperial College London

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Papers by John Jay

Investigation of hydrologic and biogeochemical controls on arsenic mobilization using distributed sensing at a field site in Munshiganj, Bangladesh

The presence of arsenic in the groundwater has led to the largest environmental poisoning in hist... more The presence of arsenic in the groundwater has led to the largest environmental poisoning in history; tens of millions of people in the Ganges Delta continue to drink groundwater that is dangerously contaminated with arsenic. A current working hypothesis is that arsenic is mobilized in the near surface environment where sediments are weathered by seasonal changes in the redox state

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The Role of the Academy in Policy Formation and Critique

The Impact of Fire on Mercury Cycling in Watershed Systems

Mercury methylation is a process by which the less-toxic inorganic mercury is transformed into me... more Mercury methylation is a process by which the less-toxic inorganic mercury is transformed into methylmercury (MeHg). MeHg is a potent neurotoxin with a strong tendency to biomagnify within the food chain. Limited studies suggest that wildfires change the soil characteristics and contribute to Hg transport and possibly methylation in downstream ecosystems. We propose that post-fire Hg cycling can be related

Visualization of Mercury Methylating Pure-Culture Sulfate-Reducing Biofilms

Methylmercury is a potent neurotoxin that can accumulate in food chains posing a serious ecologic... more Methylmercury is a potent neurotoxin that can accumulate in food chains posing a serious ecological problem in certain aquatic systems. Relatively less toxic inorganic mercury (Hg) is converted to methylmercury (CH3Hg+) by bacteria, and it has been shown that sulfate reducing bacteria (SRB) are the major mediators of this process in many aquatic systems. To date, all laboratory studies on

Spatial and Temporal Evolution of Mercury in Post-fire Soils in Southern California Watersheds

Wildfires are well known sources of mercury (Hg) to the atmosphere, but there is a paucity of dat... more Wildfires are well known sources of mercury (Hg) to the atmosphere, but there is a paucity of data characterizing how fire impacts the transport of Hg to surface waters where methylation can occur. Because post-fire storm events have the potential to carry large sediment loads to a stream system, it is important to understand the effects of wildfire on Hg

Mercury Binding and Mobilization in Post-fire Soil Horizons

Fires affect watersheds in many ways, including through increased erosion and sediment transport,... more Fires affect watersheds in many ways, including through increased erosion and sediment transport, decreased water quality, and transport and cycling of nutrients and metals. This research addresses mercury (Hg) mobilization within post-fire stream systems, focusing on the influence of soil particle size on binding affinity and potential transport. Using a network of sampling sites within the Piru Creek watershed, affected

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Sensor Measurements and Sediment Incubations Indicate Diurnal Redox Cycling Associated With Arsenic Mobilization at a Bangladeshi Rice Paddy

Abstract: The presence of arsenic in the groundwater has led to the largest environmental poisoni... more

Zero Leaks With Minimally Invasive Esophagectomy: a Team-Based Approach

JSLS, Journal of the Society of Laparoendoscopic Surgeons, 2009

Minimally invasive surgery has been applied in several ways to esophagectomy. Newer techniques ha... more Minimally invasive surgery has been applied in several ways to esophagectomy. Newer techniques have improved patient outcomes while maintaining oncological principles; however, mortality still exists. Most series have reported mortality rates ranging from 2% to 25%. The aim of this study was to determine the efficacy of minimally invasive esophagectomies (MIE) in a non-university tertiary care center. MIE in the form of a combined thoracoscopic and laparoscopic technique was performed cooperatively by 2 surgeons. Records of patients who underwent MIE between September 2005 and August 2008 were retrospectively reviewed. Thirty-four patients underwent MIE over a 3-year period. There was a male predominance. Mean age at presentation was 62.6 years. Comorbidities were documented in 79% of the patients. Most patients (68%) presented with dysphagia. Two patients had end-stage achalasia, 1 had corrosive esophageal stricture, and 31 had esophageal malignancies. No mortalities were reported. No anastomotic leaks were observed. Eighteen (58%) patients with malignancy received preoperative chemoradiotherapy. Six (33%) patients had a pathological response (CR) on final histopathology. The mean operating time was 294 minutes. The mean blood loss was 302 mL. Minimally invasive esophagectomy can be performed with results that meet and exceed reported benchmarks. A team-based approach greatly impacts the outcome of the surgery. This surgical technique must be standardized to achieve this outcome.

W1518 Minimally Invasive Esophagectomies (MIE) At a Non University Tertiary Care Center (NUTTC): Feasibility and Outcomes

Gastroenterology, 2009

Service Learning Course in Which Undergraduates and Middle School Students Investigate Levels of Pathogen Indicating Bacteria in Beach Sand

Service-learning is a pedagogy that combines academic rigor with activities that address human an... more Service-learning is a pedagogy that combines academic rigor with activities that address human and community needs. Over the past three years, we have developed a service-learning course that involves UCLA students working with 6th graders in an economically disadvantaged neighborhood to address issues of environmental science and health. This past year UCLA students conducted a research project in collaboration with

Analysis of Spatial and Temporal Variability of PM10 Concentrations Using MODIS Aerosol Optical Thickness in the Pearl River Delta Region, China

Aerosol and Air Quality Research, 2013

TITLE PAGE APPLICATION OF SOLAR ENERGY IN WATER

ABSTRACT A detailed study using theoretical approach has been carried out on solar water distilla... more ABSTRACT
A detailed study using theoretical approach has been carried out on solar water distillation technology. The study has revealed that this technology is a very viable one, capable of providing potable drinking water to rural communities remote from public potable water provision. The technology has demonstrated itself a simple and cost effective one that can be affordable by the rural populace. Many different kind of water purification process such as Multi-Stage Flash (MSF) Process, The Multiple-Effect Boiling (MEB) Process, Multiple Effect Stack (MES), The Vapor Compression (VC) Process, and Reverse Osmosis (RO) have been discussed in this work in comparison. In all cases, solar water distillation has proved its superiority over the others due to numerous advantages presented.

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DEPARTMENT OF PHYSICS BENUE STATE UNIVERSITY MAKURDI

More than 70 % of Earth's surface is covered with water. About 97.5 % of the water on earth is sa... more More than 70 % of Earth's surface is covered with water. About 97.5 % of the water on earth is salt water, leaving only 2.5 % as fresh water. Nearly, 70 % of the fresh water is frozen in the Polar Regions and the remaining part exists as soil moisture, or lies in deep aquifers as groundwater which is not accessible to human use. Only 1 % of the world's fresh water is accessible for direct human uses which is regularly renewed by rain and snowfall, and is therefore available on a sustainable basis.

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