scholarly journals Effect of Fertilizer Source on Fe, Mn, and Zn Leaching, Nutrient Distribution, and Geranium Growth

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 533E-533
Author(s):  
Michael D. Frost ◽  
Janet C. Cole ◽  
John M. Dole
Keyword(s):  
Growth Parameters ◽  
The United States ◽  
Water Soluble ◽  
Nutrient Distribution ◽  
Quality Of Water ◽  
Growing Medium ◽  
Potential Pollution ◽  
Industry Needs ◽  
To Receive

Improving the quality of water released from containerized production nurseries and greenhouse operations is an increasing concern in many areas of the United States. The potential pollution threat to our ground and potable water reservoirs via the horticultural industry needs to receive attention from growers and researchers alike. `Orbit Red' geraniums were grown in 3:1 peat:perlite medium with microtube irrigation to study the effect of fertilizer source on geranium growth, micronutrient leaching, and nutrient distribution. Manufacturer's recommended rates of controlled-release (CRF) and water-soluble fertilizers (WSF) were used to fulfill the micronutrient requirement of the plants. Minimal differences in all growth parameters measured between WSF and CRF were determined. A greater percentage of Fe was leached from the WSF than CRF. In contrast, CRF had a greater percentage of Mn leached from the system than WRF during the experiment. Also, regardless of treatment, the upper and middle regions of the growing medium had a higher nutrient concentration than the lower region of medium.

scholarly journals A global scientific literature of research on water quality indices: trends, biases and future directions

2014 ◽  
Vol 26 (3) ◽  
pp. 245-253 ◽  
Author(s):  
Maria Tereza Ribeiro Alves ◽  
Fabrício Barreto Teresa ◽  
João Carlos Nabout
Keyword(s):  
Water Quality ◽  
Linear Models ◽  
Scientific Literature ◽  
Information Criterion ◽  
The United States ◽  
Water Index ◽  
Resource Managers ◽  
Quality Of Water ◽  
Number Of Publications

AIM: Water quality has been the subject of many recent studies, moreover, the physical, chemical and biological parameters of water are used to investigate water quality and can be combined into a single index, the Water Quality Index (WQI), for use by water resource managers and the general public. The aim of this study was to use scientometrics to evaluate how water quality has been addressed in the international scientific literature. METHOD: For the quantitative analysis of the publications on WQI, we used the search database SCOPUS (http://www.scopus.com). The search was performed using the words "QUALIT* WATER* INDEX*" in papers published in all databases (through 2011). RESULTS: We found 554 articles that dealt with the use of WQI the number of publications has increased significantly over the last 20 years. India had the most studies, with 177 articles, followed by China, Brazil and the United States. These four countries together published 57% of studies on WQI. We generated 15 linear models to explain the number of publication by study sit (country). According to the Akaike Information Criterion (AIC), the best model to explain the number of publications by country was the model that combined Sanitation and Public Supply. CONCLUSION: Finally, this paper presents the state of scientific literature on WQI and demonstrates the growing interest of the scientific community in this issue, which is certainly due to the importance of the quantity and quality of water for human supply, economics, health and the conservation of water resources.

scholarly journals Basic criteria for a sustainable water management at the U.S.-México border: the case of ambos Nogales

2003 ◽  
Vol 4 (7) ◽  
pp. 35-60
Author(s):  
Luis Ernesto Cervera Gómez ◽  
Rodolfo Rubio Salas
Keyword(s):  
Water Management ◽  
Water Resources ◽  
Sustainable Use ◽  
The United States ◽  
International Perspective ◽  
Development Environment ◽  
Quality Of Water ◽  
Mexico Border ◽  
Ambos Nogales

This article aims to analyze some basic criteria for a sustainable use of water in an international watershed shared by Mexico and the United States. The study area comprises the region of Ambos Nogales, which is located inside the Upper Santa Cruz River Basin. This portion of the watershed represents the main ecosystem and the main source of water for urban and rural populations located in this region. Following criteria of sustainability the authors revise and adapt to the case of Ambos Nogales, a set of guidelines proposed by the Pacific Institute for Studies in Development, Environment, and Security. These guidelines include the following elements: basic water requirements needed to maintain quality of life in the population and the health of ecosystems; water quality that meets certain minimum standards; human actions and their impact on long-term renewability of freshwater stocks and flows; collection of data concerning water resources, use and quality of water; institutional mechanisms to prevent and resolve conflicts; and a democratic process of water-planning and decision-making. These twin cities have a long history of cooperation and conflict linked to water resources, which makes available enough information to create a diagnostic about the water management inside a binational arena, and allowing to explore possibilities for a better water resources management under a sustainable regime and from an international perspective. Keywords: Sustainability, binational water management, ambos Nogales region.

scholarly journals Decision Making: Intra-arterial Therapies for Cholangiocarcinoma—TACE and TARE

2017 ◽  
Vol 34 (02) ◽  
pp. 092-100 ◽  
Author(s):  
Brian Currie ◽  
Michael Soulen
Keyword(s):  
Quality Of Life ◽  
United States ◽  
Decision Making ◽  
Overall Survival ◽  
The United States ◽  
Hepatic Cancer ◽  
Transarterial Radioembolization ◽  
Locoregional Therapies ◽  
To Receive

AbstractThe incidence of intrahepatic cholangiocarcinoma (ICC) has been increasing in recent years and now represents the second most common primary hepatic cancer in the United States. The prognosis is dismal without surgical resection. In patients ineligible to receive curative treatments, locoregional therapies represent a diverse array of techniques that can stabilize or reverse tumor progression to improve overall survival and reduce tumor-related symptoms. Transarterial chemoembolization (TACE) and transarterial radioembolization (TARE) have been demonstrated to be efficacious methods for this patient population. Deciding between these two options is challenging. This article reviews the differences in patient selection, preprocedural evaluation, financial considerations and availability, quality of life, and rates of complications and overall survival.

scholarly journals Multiplex Fluorogenic Real-Time PCR for Detection and Quantification of Escherichia coli O157:H7 in Dairy Wastewater Wetlands

2002 ◽  
Vol 68 (10) ◽  
pp. 4853-4862 ◽  
Author(s):  
A. Mark Ibekwe ◽  
Pamela M. Watt ◽  
Catherine M. Grieve ◽  
Vijay K. Sharma ◽  
Steven R. Lyons
Keyword(s):  
Escherichia Coli ◽  
Detection Limit ◽  
The United States ◽  
Dairy Wastewater ◽  
Pcr Assay ◽  
E Coli ◽  
Quality Of Water ◽  
Plate Counts

ABSTRACT Surface water and groundwater are continuously used as sources of drinking water in many metropolitan areas of the United States. The quality of water from these sources may be reduced due to increases in contaminants such as Escherichia coli from urban and agricultural runoffs. In this study, a multiplex fluorogenic PCR assay was used to quantify E. coli O157:H7 in soil, manure, cow and calf feces, and dairy wastewater in an artificial wetland. Primers and probes were designed to amplify and quantify the Shiga-like toxin 1 (stx1) and 2 (stx2) genes and the intimin (eae) gene of E. coli O157:H7 in a single reaction. Primer specificity was confirmed with DNA from 33 E. coli O157:H7 and related strains with and without the three genes. A direct correlation was determined between the fluorescence threshold cycle (CT ) and the starting quantity of E. coli O157:H7 DNA. A similar correlation was observed between the CT and number of CFU per milliliter used in the PCR assay. A detection limit of 7.9 × 10−5 pg of E. coli O157:H7 DNA ml−1 equivalent to approximately 6.4 × 103 CFU of E. coli O157:H7 ml−1 based on plate counts was determined. Quantification of E. coli O157:H7 in soil, manure, feces, and wastewater was possible when cell numbers were ≥3.5 × 104 CFU g−1. E. coli O157:H7 levels detected in wetland samples decreased by about 2 logs between wetland influents and effluents. The detection limit of the assay in soil was improved to less than 10 CFU g−1 with a 16-h enrichment. These results indicate that the developed PCR assay is suitable for quantitative determination of E. coli O157:H7 in environmental samples and represents a considerable advancement in pathogen quantification in different ecosystems.

scholarly journals Sistem Monitoring Dan Kontroling Kualitas Air Tambak Udang Vannamei Berbasis Arduino Menggunakan Teknologi Internet Of Things

2020 ◽  
pp. 105-108
Author(s):  
Nuris Dwi Setiawan ◽  
Indra Ava Dianta
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Salt Content ◽  
Ph Sensor ◽  
Pond Water ◽  
Storage Media ◽  
Quality Of Water ◽  
Water Quality Change ◽  
To Receive

Vannamei shrimp is a variety of shrimp that is very sensitive to changes in water quality, growth and life of vannamei shrimp which are directly affected by changes in temperature, salt content, dissolved oxygen, and pH (Hydrogen Potential) content in water. So far, vannamei shrimp cultivators know the quality of water by taking pond water samples with a certain period of time, uncertain natural conditions can make pond water quality change drastically if not maintained can inhibit growth or result in shrimp death.Making a monitoring system and controlling the quality of shrimp pond water using a water temperature sensor, salinity sensor, DO sensor and pH sensor installed on the Arduino Mega 2560 device, NodeMCU is used to receive and send data wirelessly, the system uses programming language c. This tool can be used to start the waterwheel automatically if it is within a certain threshold to maintain the temperature and dissolved oxygen in the pool water based on the value obtained from the sensor. The monitoring results obtained will be displayed to the user in real time through the interface and will be stored in the form of a text file on the storage media.

The impact of race on gastric cancer outcomes in the United States.

2013 ◽  
Vol 31 (4_suppl) ◽  
pp. 83-83
Author(s):  
Benjamin Daniel Powers ◽  
Maureen Patricia Daly ◽  
Adam Davey ◽  
Sharven Taghavi ◽  
Senthil N. Jayarajan ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Asian American ◽  
The United States ◽  
Lower Grade ◽  
Cancer Outcomes ◽  
Anatomic Site ◽  
Lower Stage ◽  
The Impact ◽  
To Receive

83 Background: Disparities in gastric cancer outcomes are well-documented. We evaluate the association of race with gastric cancer outcomes using a diverse database of patients in the U.S. Methods: SEER was queried for gastric adenocarcinoma cases from 2004-2008, excluding cardia. Logistic (LR) and Cox regressions were used for analyses. Results: 9,440 cases were analyzed: 4,134 (43.8%) Whites (W), 2,015 (21.3%) Asian-American Pacific Islanders (AP), 1,826 (19.3%) Hispanics (H), and 1,465 (15.5%) Blacks (B). Presentation: Average age was 70.1. B, H, and AP were more likely than W to present younger. AP were more likely and H less likely than W to present at a lower stage. B were more likely to have a lower grade. No differences in gender were seen. Treatment: Compared to W, AP were more likely to have surgery. AP, H, and B were more likely to receive radiation (XRT). AP and H had increased odds of ≥15 lymph nodes examined (LNE). Survival: AP and H had improved but B had worse survival compared to W when stratified by receipt of surgery, XRT, and stage and adjusted for age, gender, LNE, anatomic site, and grade. Conclusions: AP were more likely to present with lower stage, have surgery, XRT, ≥15 LNE, and highly significantly better survival than W. H were more likely to present younger but with higher stage, have ≥15 LNE, XRT, and better survival. For B there were no differences in stage or receipt of surgery, though there were increased odds of XRT but had worse survival. These racial disparities in gastric cancer suggest potential differences in tumor or host biology and quality of treatment that impact outcomes and merit further study. [Table: see text]

Thinking Like a River

1994 ◽  
Author(s):  
Donald Worster
Keyword(s):  
United States ◽  
The United States ◽  
High Tech ◽  
Natural Cycle ◽  
Soil Resource ◽  
Cooking Oil ◽  
Quality Of Water ◽  
Poor Management

When we drive by a modern farm, we still expect to see green plants sprouting from the earth, bearing the promise of food or cooking oil or a cotton shirt. Pulling up one of those plants, we are still prepared to find dirt clinging to its roots. Even in this age of high-tech euphoria, agriculture remains essentially a matter of plants growing in the soil. But another element besides soil has always been a part of the farmer’s life-water. Farming is not only growing crops on a piece of land, it is also growing crops in water. I don’t mean a hydroponics lab. I mean that the farmer and his plants inescapably are participants in the natural cycle of water on this planet. Water is a more volatile, uncertain element than soil in the agricultural equation. Soil naturally stays there on the farm, unless poor management intervenes, whereas water is by nature forever on the move, falling from the clouds, soaking down to roots, running off in streams to the sea. We must farm rivers and the flow of water as well as fields and pastures if we are to continue to thrive. But it has never been easy to extract a living from something so mobile and elusive, so relentless and yet so vulnerable as water. If there is to be a long-term, sustainable agriculture in the United States or elsewhere, farmers must think and act in accord with the flow of water over, under, through, and beyond their farms. Preserving the fertility of the soil resource is critical to sustaining it, of course, but not more so than maintaining the quality of water. In many ways, the two ideals are one. And their failure is one, as when rain erodes the topsoil and creeks and rivers suffer. But there are differences between those two resources, differences we must understand and respect. Unlike soil, water cannot be “built.” It can be lost to the farmer, or it can be diverted, polluted, misused, or over-appropriated, but it can never be deepened or enhanced as soil can be.

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