scholarly journals Hydrochemical study of Drean–Annaba aquifer system (NE Algeria)

2017 ◽  
Vol 34 (1) ◽  
pp. 259-263 ◽  
Author(s):  
Lamine Sayad ◽  
Larbi Djabri ◽  
Saad Bouhsina ◽  
Catherine Bertrand ◽  
Azzedine Hani ◽  
...  
Keyword(s):  
Water Quality ◽  
Point Of View ◽  
Rock Interaction ◽  
Aquifer System ◽  
Hydrochemical Study ◽  
Alluvium Aquifer ◽  
Alkaline Earths ◽  
Components Analysis ◽  
The Relationship

Abstract Water quality is subject to frequent changes in the Drean-Annaba alluvium aquifer. Water-rock interaction can not be the only process that produces the observed modification, but dryness that the country knew during the last two decades has highly contributed to the water quality changes. During this period, irregularities in the distribution of rainfalls, in time and space, have been observed. As a result, a periodicity in hydrochemical changes in water of wells and rivers is noticed. Statistical, the principals components analysis (PCA) tools and Tickel diagram have been used to show, through chemical presentation, these effects. The results show, indeed, seasonal changes of water quality for the period 1999-2000. From a cationic point of view, a competition between alkaline and alkaline earths is shown. On the other hand, from an anionic point of view, there is a transition from chlorides to sulphates and may be to bicarbonates. The present work was carried out in a relatively small area and this was useful to show the relationship that existed between dryness and water quality of both the aquifer system and surface water.

Quality assessment of drinking water in the communities of São Francisco do Conde, Baiacu, Santo Amaro and Cachoeira

2021 ◽  
Author(s):  
JOSEINA MOUTINHO TAVARES ◽  
Anderson Silva de Oliveira ◽  
Paulo Moutinho Andrade de Souza ◽  
Walter da Silva Junior
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Quality Assessment ◽  
Continuous Monitoring ◽  
Point Of View ◽  
Chlorine Content ◽  
Contaminated Water ◽  
Public Agencies ◽  
Total Coliforms

This work aims to evaluate the quality of drinking water in the communities of Baiacu, Sao Francisco do Conde, Santo Amaro and Cachoeira. It was verified that in some places of Santo Amaro and Sao Francisco do Conde, from the microbiological point of view, it is not appropriate for consumption, because it was found that the presence of total coliforms in 50% of the samples and that the chlorine content is below the values indicated by the standards in 75% of the analyzed samples. Thus, the consumption of contaminated water can cause diseases, so it is recommended cleaning of residential reservoirs, maintenance in pipes periodically, as well as the need for continuous monitoring of water quality and the intense participation of public agencies in these actions. Through these actions and the active participation of the population, one can preserve the environment and the lives of all those who transit in the communities of the Bay of All Saints

scholarly journals Some aspects of food safety from animal origin

2012 ◽  
pp. 153-155
Author(s):  
József Fenyvessy
Keyword(s):  
Functional Foods ◽  
Raw Materials ◽  
Point Of View ◽  
Animal Origin ◽  
Biological Origin ◽  
Chemical Substances ◽  
Healthy Nutrition ◽  
Public Health Hazards ◽  
The Relationship

The relationship between the civilisation illnesses and incorrect nutrition can be considered as demonstrated. The functional foods having one or several nutritional- biological advantage can contribute to the healthy nutrition and to improving the quality of life. Beside the healthy nutrition it is an another important requirement that the food does not contain pathogens or substances of chemical and biological origin namely it has to be safe. In this publication the foods of animal origin were investigated in the point of view of public health hazards arising during their production and processing.The contamination and infection of food raw materials, the consequence of chemical substances getting in or developing it the food, the judgement of food deviring from genetically modified or cloned animals are discussed.

scholarly journals Utilization of factor analysis in waterworks engineering

2004 ◽  
Vol 52 (2) ◽  
pp. 121-128
Author(s):  
Petra Nováková
Keyword(s):  
Water Quality ◽  
Factor Analysis ◽  
Quality Indicators ◽  
Water Reservoir ◽  
Statistical Processing ◽  
Point Of View ◽  
Water Quality Indicators ◽  
Quality Of Water ◽  
The Individual

The aim of the work was to elaborate and evaluate the water quality of water reservoir Vranov nad Dyjí. Fresh water was sampled in five different locations of the reservoir (three important tributaries, dam and water captation locality). Ten, the most essential water quality indicators were selected. From the point of view of water quality indicators complexity the most integrated samples were taken in the water captation locality (period 1984 – 2002). At other locations, there were missing dates from the eightieth, but their volume was sufficient for statistical processing.Correlation analyses for the individual locations and dimensions were done as so as determination coefficients for all localities during the time period of 1994 – 2002. The results demonstrate very good allocation of the water captation from the point of view of the water flow.Multiples and factor analysis was done for the period of 1984 – 2002 in the locality Jelení zátoka where the object of water captation is situated. The results of the analysis are nine factors, which influence the water quality of the reservoir. From the point of view of the importance three factors were interpreted.The analyses and results are part of my Ph.D. thesis. The results will be used for other evaluations of the water quality in the reservoir and tributaries, for activities in the catchment’s area and for proposal processing other zones of second level of protected areas.

scholarly journals The development of trust over time in an emerging market context: the case of the Tunisian automotive sector

2019 ◽  
Vol 34 (6) ◽  
pp. 1210-1222 ◽  
Author(s):  
Tibor Mandják ◽  
Samy Belaid ◽  
Peter Naudé
Keyword(s):  
Emerging Market ◽  
Qualitative Interviews ◽  
Spare Parts ◽  
Point Of View ◽  
Business Relationship ◽  
Content Type ◽  
Perceived Trust ◽  
Emerging Country ◽  
The Relationship

Purpose The purpose of this paper is to empirically investigate how context influences the quality of business relationships. This theoretical question is studied from the point of view of trust, one of the important components of business relationship quality. The authors study how trust is related to the dynamics and management of the business relationship in the context of an emerging market. Design/methodology/approach This paper is based on qualitative interviews with 15 spare-parts resellers in the Tunisian automotive industry. The authors take a monadic view, interviewing resellers about their relationships with their wholesalers-importers. The decision to undertake the research in Tunisia is based on three factors. First, Tunisia is an emerging country and there is very little published research based in the Maghreb countries. Second, the Tunisian automotive parts market structure is relatively simple and, hence, easily understood, with most spare-parts being imported because of the low level of local production. Third, the actors in the study are all Tunisian companies, so research allows us to explore relationships between local companies in an emerging country. Findings The authors find that different kinds of trust play different roles over the dynamics of the relationship. Perceived trust is more important at the emergent stage of a relationship, and as the two parties learn from each other, experienced trust becomes more important in the established relationships. The initial perceived trust creates the possibility of building trust, and when mutual trust exists between the parties, it motivates them to maintain the relationship, but there is always the threat of the degradation of the quality of the relationship because of the violation or destruction of the trust. Research limitations/implications This paper shows that more care should be taken when using trust as the variable under scrutiny. Different aspects of trust manifest themselves at various stages of the relationship building cycle. Practical implications The results emphasize that when initiating a business relationship, managers first need to create perceived trust. Thereafter, once trust is built up, it is the trust that may “manage” or act to control the on-going relationship as long as the partners’ behavior or network changes do not violate the trust. Originality/value The results of this paper show that there is a mutual but not necessarily symmetrical or balanced influence of trust on the behavior of the partners involved. The influence of the different parties is dependent on the power architecture, the history of the relationship and the network position of the actors.

scholarly journals Hydrological Variability Impact on Eutrophication in a Large Romanian Border Reservoir, Stanca–Costesti

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3065
Author(s):  
Gabriela Elena Dumitran ◽  
Liana Ioana Vuta ◽  
Bogdan Popa ◽  
Florica Popa
Keyword(s):  
Water Quality ◽  
Trophic State ◽  
Multicriteria Analysis ◽  
Biological Data ◽  
Point Of View ◽  
Temperature Changes ◽  
Hydrological Variability ◽  
Hydrologic Variability ◽  
Research Findings

Climate change represents one of the major challenges of our century with great potential to alter water quality, and hence, find suitable solutions becomes a must. Stanca–Costesti reservoir is one of the most important in Romania and one of the most affected by the hydrologic variability. The studies regarding the trophic state of this reservoir are few, even if there are some environmental issues in its hydrological basin that could be further investigated. According to the National Administration “Apele Romane” (ANAR) yearly reports, the Stanca–Costesti reservoir is, from the trophic state point of view, an oligotrophic lake. The current research is based on chemical and some biological data collected over 10 years (ANAR) for the trophic state of the Stanca–Costesti reservoir, using the Carlson index. The research investigates the hydrological data and spans over 10 years that were classified into three categories, namely: wet year, normal year, and dry year and the influences generated by the contrasting weather (flow and temperature changes) on the trophic state of the lake. The research findings show that the trophic state of the lake is directly influenced by the hydrological variability, namely evolving to a hypertrophic status due to concentrations of nutrients. Moreover, over the years, according to ANAR data, the water quality in the reservoir alternated. Hence, at times, the quality of the water was poor, with possible negative influences on water usage. As a consequence, we proposed that the water quality be verified monthly, and this should be done by means of a more reliable method, such as a multiparameter index or multicriteria analysis.

scholarly journals Integrity and derailment of senior leaders in the Southern African context

2019 ◽  
Vol 45 ◽  
Author(s):  
Pieter Koortzen ◽  
Rudolf M. Oosthuizen
Keyword(s):  
Leadership Development ◽  
Point Of View ◽  
Integrity Test ◽  
Senior Leaders ◽  
Cross Sectional ◽  
Quality Of Leadership ◽  
Managerial Implications ◽  
Value Add ◽  
The Relationship

Orientation: In recruiting and developing senior leaders for the organisation, great emphasis is placed on the personality of these individuals and on the resulting manifestations of their behaviour in the work context.Research purpose: The objective of this study was to explore the relationship between integrity and derailment to identify the dimensions of integrity that may reduce the risks of derailing in a group of senior leaders.Motivation for the study: As organisations become more complex, a higher quality of leadership is demanded. The quality of leadership is often determined by, among other things, the level of leaders’ integrity and the manner in which they are able to manage their own derailment at work. In this study, integrity is defined as the conflict and balance between our instincts (i.e. vices) and our ability to reason (i.e. our virtues), while leadership derailment is defined as the way in which leaders behave under stress or when they overuse a particular strength. Both constructs are of particular concern when they manifest in the organisation’s pool of high-potential leaders, who are the organisation’s future successors. However, most derailment cases are predictable and can be managed effectively with proper intervention.Research approach/design and method: A cross-sectional quantitative, correlational research design was followed. A non-probability purposive sample of 108 senior leaders in companies in Southern Africa participated in the study.Main findings: The results enabled the researchers to assess the relationship between integrity and derailment in order to identify the dimensions of integrity that are associated with a lowered risk of derailing in a group of senior leaders. It is apparent from the results that several of the integrity dimensions measured in the current study acted as significant predictors of derailment. The results indicate that the Giotto scales predict five of the Hogan scales to a degree that could be regarded as practically significant and are associated with medium to large effect sizes). These are Excitable, Cautious, Leisurely, Bold and Colourful. The prediction of Cautious can be described as practically important, while the prediction of the remainder of the Hogan scales was practically non-significant.Practical/managerial implications: From a practical point of view, the research findings allow leadership development practitioners, consultants and coaches to assist leaders in identifying the ways in which leaders will probably derail based on the results of the Giotto integrity test. Those involved in the development of leaders will also be able to develop the leaders’ level of integrity in order to reduce unnecessary derailment at work.Contribution/value-add: The study findings contribute valuable information on the relationship between integrity and derailment and the dimensions of integrity, which may reduce the risks of derailment of senior leaders.

scholarly journals A Study on the Relationship between Land Use Change and Water Quality of the Mitidja Watershed in Algeria Based on GIS and RS

2020 ◽  
Vol 12 (9) ◽  
pp. 3510 ◽  
Author(s):  
Dechao Chen ◽  
Acef Elhadj ◽  
Hualian Xu ◽  
Xinliang Xu ◽  
Zhi Qiao
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Land Use Change ◽  
River Basin ◽  
Agricultural Land ◽  
Vegetation Coverage ◽  
Water Quality Control ◽  
Urban Settlement ◽  
The Relationship

Many catchments in northern Algeria, including the coastal Mitidja Basin in the north central part of the country have been negatively affected by the deterioration of water quality in recent years. This study aims to discover the relationship between land use change and its impact on water quality in the coastal Mitidja river basin. Based on the data of land use and water quality in 2000, 2010 and 2017, the relationship between land use change and surface water quality index in the Mitidja Watershed was discussed through GIS and statistical analysis. The results show that the physical and chemical properties of the Mitidja river basin have obvious spatial heterogeneity. The water quality of upstream was better than that of downstream. There was a significant spatial relationship between the eight water quality indicators and three land use types, including urban residential land, agricultural land and vegetation. In most cases, settlements and agricultural land are the dominant factors leading to river pollution, and higher vegetation coverage helps to improve water quality. The regression model revealed that percentage of urban settlement area was a predictor for NH4-N, BOD5, COD, SS, PO4-P, DO and pH, while vegetation was a predictor for NO3-N. The analysis also showed that during this period, urban settlement areas increased sharply, which has a significant impact on water quality variables. Agricultural land only had a significant positive correlation with PO4-P. The results provide an effective way to evaluate river water quality, control water pollution and land use management by landscape pattern.

scholarly journals Trace Elements Analysis in Drinking Water of Meghalaya by Using Graphite Furnace-Atomic Absorption Spectroscopy and in relation to Environmental and Health Issues

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Elarina N. Dkhar ◽  
Paul S. Dkhar ◽  
Jasha Momo H. Anal
Keyword(s):  
Water Quality ◽  
Trace Elements ◽  
Drinking Water ◽  
Graphite Furnace ◽  
Major And Trace Elements ◽  
Point Of View ◽  
Health Issues ◽  
Trace Elements Analysis

Determination of the certain major and trace elements was carried out in drinking water supply scheme in three districts of Meghalaya. This work aims to identify trends resulting in the deterioration of drinking water which is also a potential source of environmental contaminants. About 50 samples, each from one district, were collected both from the source and various tanks and tap. The elements determined are Li, Na, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Rb, Ag, Au, Pb, Cd, Se, Ca, K, and Mg. The pH is slightly lower than neutral pH of 7 while the turbidity is very high even after treatment. The concentrations of Ca and Mg are found to be deficient. The elements Cr, Fe, Co, Ni, Zn, Mo, and Pb decrease after treatment while Mn, Cu, and Cd increase slightly after treatment. Se concentration is found to be much higher than expected. The results were compared with the standard recommendation values for the quality of drinking water. This study provides a general indication of where water-quality constituent concentrations met or exceeded water-quality standards and the data presented in this report will be useful from public health point of view.

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