scholarly journals Quality of Streams in Johnson County, Kansas, and Relations to Environmental Variables, 2003-07

2009 ◽  
Author(s):  
Teresa J. Rasmussen ◽  
Barry C. Poulton ◽  
Jennifer L. Graham
Keyword(s):  
Environmental Variables ◽  
Johnson County

scholarly journals Hormonal endogenous changes in response to the exogenous 6-benzylaminopurine application in pre- and post-harvesting lilium flower stalks

2021 ◽  
Author(s):  
Gunther Mantilla ◽  
Gabriel Antonio Lorenzo ◽  
Libertad Mascarini
Keyword(s):  
Environmental Variables ◽  
Lilium Longiflorum ◽  
Vase Life ◽  
Plant Responses ◽  
Biological Processes ◽  
Hormonal Changes ◽  
Post Harvest ◽  
Growth Development ◽  
Post Harvesting

Abstract Phyto-hormones play a key role in regulating plant responses to stress. Cytokines are a type of phyto-hormones involved in the regulation of many important biological processes related to growth, development, and response to environmental variables. The exogenous application of cytokines increases the possibility of delaying senescence; however, this is a physiological process, and, under certain conditions, degradation processes may be triggered. The effect of 6-bencilaminopurine application and the endogenous hormonal changes involved in lilies floral stalks after their cutting were studied. In order to improve vase life and quality of Lilium longiflorum ‘Brindisi’ flower stalks, they were sprayed with 6-BAP, at a concentration of 300 ppm at pre-harvest, post-harvest, and pre- and post-harvest stages. After that, they were compared to non-sprayed control stalks. The application of 6-BAP caused endogenous hormonal changes in abscisic acid and cytokinin levels, and the most effective treatment was pre-harvest spraying. This treatment proved to be an appropriate method to improve the stalk tolerance to post-harvest stress as it delayed the appearance of senescence symptoms and reduced the speed of chlorophyll degradation with differences of up to 10% with respect to untreated stalks. In addition, the opening of flowers was delayed by up to 2 days, although there were no significant differences in total vase life.

scholarly journals PREHARVEST FACTORS INFLUENCING POSTHARVEST QUALITY OF TROPICAL AND SUBTROPICAL FRUIT

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 568c-568
Author(s):  
M.L. Arpaia
Keyword(s):  
Pest Management ◽  
Environmental Variables ◽  
Management Practices ◽  
Postharvest Quality ◽  
Improve Quality ◽  
Considerable Variability ◽  
Factors Influencing ◽  
Postharvest Handling ◽  
Subtropical Fruit

Although postharvest handling schemes have improved during recent years, it is still possible to observe considerable variability in fruit quality between individual lots. Preharvest factors such as irrigation, nutrition and pest management practices, as well as rootstock and environmental variables, may greatly influence quality after harvest and may well account for some of the differences between individual lots. The influence of preharvest factors on postharvest quality of tropical and subtropical fruit will be discussed using pertinent examples from the literature. Emphasis will be given to those factors which can be manipulated to improve quality.

scholarly journals Green and Charophyte Algae in Bioindication of Water Quality of the Shah Alam River (District Peshawar, Pakistan)

2019 ◽  
Vol 21 (1) ◽  
pp. 1-16
Author(s):  
Izaz Khuram ◽  
Zahir Muhammad ◽  
Nadeem Ahmad ◽  
Rehman Ullah ◽  
Sophia Barinova
Keyword(s):  
Water Quality ◽  
Environmental Variables ◽  
Trophic State ◽  
Algal Species ◽  
Organic Pollution ◽  
River Pollution ◽  
Pollution Indices ◽  
Oxygenated Water ◽  
Kabul River

Abstract 58 species and infraspecies of Chlorophyta and Charophyta algae were observed in 60 samples collected in September 2017 from the Shah Alam River, Pakistan. The algal species richness and environmental variables increased down the river, except for pH. Bioindication revealed low saline, low alkaline, middle streaming, and middle oxygenated water with low to middle organic pollution with Index saprobity S 1.48-1.73, Class 2-3 of Water Quality. The trophic state was eutrophic and meso-eutrophic with increasing eutrophication down the river. River Pollution Indices RPI demonstrated increasing of pollution in the Shah Alam River in comparison with the parallel part of the Kabul River.

scholarly journals Optimization of railway infrastructures rehabilitation based on multicriteria analysis

2018 ◽  
Vol 211 ◽  
pp. 12003
Author(s):  
Paula Couto ◽  
Filipa Salvado ◽  
Maria João Falcão Silva
Keyword(s):  
Decision Making ◽  
Environmental Variables ◽  
Social Economic ◽  
Multicriteria Analysis ◽  
Practical Implementation ◽  
Decision Making Process ◽  
Investment Projects ◽  
The Many ◽  
Selection Of

The socio-economic objectives of transport projects are generally related to the improvement of travel conditions for goods and passengers as well as the improvement of the quality of the environment and the wellbeing of the served population. Railways infrastructure projects are always complex because of the many variables involved. In railway rehabilitation, in particular, social, economic and environmental variables take on considerable importance. These variables contribute strongly to the selection of the intervention project to be performed. Historically, multicriteria evaluation methods were developed to select the best alternative from a set of competing options. Multicriteria Analysis is applied for comparison of alternative projects, allowing taking into account different criteria simultaneously. It presents a framework in which all the stakeholders can participate actively in the process of decision making and in the explicit resolution of problems. The paper intends to frame the multicriteria analysis with the purpose of its implementation in railway investment projects concerning rehabilitation interventions. In this sense, its importance and potential will be highlighted for several stakeholders in the decision-making process, as well as the objectives and criteria definition for a practical implementation.

scholarly journals Monitoring the water quality of Lake Olathe, Johnson County, Kansas

Fact Sheet ◽  
2005 ◽  
Author(s):  
Patrick P. Rasmussen ◽  
DeWayne H. McAllister
Keyword(s):  
Water Quality ◽  
Johnson County

scholarly journals Methods in Description and Validation of Local Metagenetic Microbial Communities

2017 ◽  
Author(s):  
David Molik ◽  
Michael E. Pfrender ◽  
Scott Emrich
Keyword(s):  
Environmental Variables ◽  
Group Membership ◽  
Atacama Desert ◽  
Ecological Factors ◽  
Alternative Methods ◽  
Silhouette Width ◽  
Soil Conductivity ◽  
The Relationship ◽  
Existing Data

Abstract1. We propose MinHash (as implemented by MASH) and NMF as alternative methods to estimate similarity between metagenetic samples. We further describe these results with cluster analysis and correlations with independent ecological metadata.2. Using sample to sample similarities based on MinHash similarities we use hierarchal clustering to generate clusters, simultaneously we generate groups based on NMF, and we compare groups generated from the MinHash similarity derived clusters and from NMF to those determined by the environment, looking to Silhouette Width for an assessment of the quality of the cluster.3. We analyze existing data from the Atacama Desert to determine the relationship between ecological factors and group membership, and using the generated groups from MASH and NMF we run an ANOVA to uncover links between metagenetic samples and known environmental variables such as pH and Soil Conductivity.

scholarly journals Coliform density in oyster culture waters and its relationship with environmental factors

2013 ◽  
Vol 48 (8) ◽  
pp. 833-840 ◽  
Author(s):  
Luciene Mignani ◽  
Edison Barbieri ◽  
Helcio Luis de Almeida Marques ◽  
Ana Julia Fernandes Cardoso de Oliveira
Keyword(s):  
Water Quality ◽  
Environmental Variables ◽  
Monitoring Program ◽  
Total Coliform ◽  
Oyster Culture ◽  
Crop Fields ◽  
Thermotolerant Coliforms ◽  
Tidal Variations ◽  
Marine Culture

The objective of this work was to evaluate the total and thermotolerant coliform densities in the oyster culture water of Cananeia, SP, Brazil, correlating these densities with environmental variables and tidal variations. Superficial water samples were collected in two tide conditions (spring and neap) from three areas of Cananéia municipality (Mandira, Itapitangui and Cooperostra). The three studied areas showed good conditions for the culture regarding coliform densities. The two tidal conditions differed significantly as to total coliform concentration; however, the same procedure was not performed for thermotolerant coliforms. No correlation was observed between water temperature, pH, and concentrations of total and thermotolerant coliforms. Coliform density was positively correlated with rainfall and negatively correlated with salinity. Spring and neap tides differed significantly as to coliform number. Simple diagnosis of environmental conditions of the crop fields is insufficient to assess water quality of shellfish cultivation. A continuous monitoring program of planted areas is necessary both for the assessment of water quality potential for marine culture and for ensuring safe consumption of seafood, besides constituting an important tool to understand the relationships between contamination and the involved environmental variables.

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