Wyniki wyszukiwania - Biblioteka Nauki

1

In situ study of adult Artemia salina morphometry and its relationship to the physicochemical water parameters in the saltwork of Sahline (Tunisia)

100%

Ben Naceur H. , Ben Rejeb Jenhani A. , Romdhane M. S.

Oceanological and Hydrobiological Studies

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2011

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tom Vol. 40, No.4

44-51

EN

The morphometric characteristics of the adult natural population of the brine shrimp Artemia salina from the saltwork of Sahline were surveyed in order to establish the relationship between morphometry and environmental water parameters. The field work was performed monthly from October 2005 to June 2006. During this period, the variation in water temperature, salinity, pH, and concentrations of dissolved oxygen and nutrients (orthophosphate, nitrite, nitrate and ammonium) were monitored. Adult Artemia samples (male and female) were randomly collected and stored in plastic containers and transferred to the laboratory for morphometric characterisation. Results show that adult specimens appear in the saltwork of Sahline from December through June. The population sampled in June had significantly lower values in all morphometric characters when compared to the other samples. Concerning male specimens, correlation analysis of the morphometric parameters and environmental conditions indicate that the strongest correlations were between temperature and total length (rxy = -0.656), salinity and total length (rxy = -0.558), and between pH and width of head (rxy = 0.559). For female specimens, the strongest correlations were between total length and salinity (rxy = -0.610), total length and temperature (rxy = -0.537) and between total length and pH (rxy = 0.583). No correlations were observed between dissolved oxygen concentrations or ammonium levels and any morphometric parameters. The principal component analysis (PCA) revealed that diameter of compound eyes, width of second abdominal segment and width of third abdominal segment, for male specimens, and total length, abdominal length and width of the ovisac, for female specimens, are the morphometric parameters that show the greatest variation between samples.

2

Content of the Label Paper and the Variation of Physico-Chemical Parameters in Bottled Water in Kosovo

100%

Çadraku H.

Journal of Ecological Engineering

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2022

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tom Vol. 23, nr 11

122--131

EN

Water is a vital resource for the existence of mankind and all ecosystems on Earth. Before using it, it must be ensured that water is of good quality, within the hygienic-sanitary norms for human consumption. In recent decades, the supply of drinking water has been supplemented with the water bottled in glass and plastic bottles, which is found everywhere in the market of the Republic of Kosovo. This paper deals with the content of the label paper and the variation of physico-chemical parameters of bottled water which is extracted, analyzed, processed, filled, packaged and distributed on the market of the Republic of Kosovo and beyond as a product for consumption. i.e. In this paper 20 brands of groundwater (types of water) produced and packaged in the territory of Kosovo.

3

Determination of Water Quality Index of Selected Water Bodies in Warri, Delta State, Nigeria

100%

Ama I. N. , Ebichime N. G. , Agbaire P. O. , Verla A. W.

World News of Natural Sciences

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2018

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tom 16

42-52

EN

Water Quality index indicating the water quality in terms of index number, offers a useful representation of overall quality of water for public or for any intended use, as well as in pollution abatement programmes and in water quality management. The present study was carried out to determine the Water Quality Index (WQI) of selected rivers in Warri, Delta State, using fourteen physicochemical parameters and on the basis of weighted Arithmetic Index in order to access the suitability of this water for consumption, recreation and other purposes. The parameters were measured monthly for one year at the six selected water bodies. In this study, WQI was determined by the analysis-on the basis of various physicochemical parameters such as pH, chlorides, electrical conductivity, dissolved oxygen, biochemical oxygen demand, total dissolved solid, total suspended solids, chlorides, sulphates, chemical oxygen demand, oil/grease. Result obtained for the different sampling sites were found to fall within the WQI classifications - poor water (100-200) to unsuitable water or unfit (>300). There is, therefore, the need to periodically assess these water bodies to ensure the quality is suitable for the intended purpose.

4

Evolution of the Physico-Chemical and Biological Quality of the Waters of Soueir River (Morocco)

88%

Hbaiz E. M. , Fath-Allah R. , Rezouki S. , Lebkiri M. , Fadli M.

Ecological Engineering & Environmental Technology

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2022

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tom Vol. 23, iss. 4

202--211

EN

As part of the monitoring of water quality of Soueir river, two sampling companions were conducted from April to February during the two periods 2016/2017 and 2018/2019. The study consists of measuring 14 physico-chemical parameters and establishing the inventory of benthic macroinvertebrates upstream and downstream of Soueir river. The physico-chemical parameters were used to calculate the water quality index (WQI) and the exploitation of the results of the fauna inventory allowed us to determine the Shannon - Weiner diversity index (H’) and the Belgian biological index (BBI). The comparative study of the results of the two periods shows that during the two sampling periods, the recorded values of the physico-chemical parameters are lower than the admitted standards, except for nitrates and ammonium which present high levels during certain periods of the year, sometimes exceeding the Moroccan standards. These high concentrations can be explained by the excessive use of chemical fertilizers in the activity and the decrease of the water flow. The calculation of the water quality index (WQI) reveals that the water quality varies with a tendency towards degradation from upstream to downstream, the water becomes of poor quality or even non-drinkable. The values of the BBI indicate that the water of Soueir river is not very polluted, and that the quality of the water decreases during the winter period due to the erosion of the substrate and the increase of the matter in suspension. The diversity of benthic macroinvertebrates is greater downstream, due to the diversity of habitats and substrates.The second sampling period reveals a slight improvement in the physico-chemical and biological qualities of the waters of Soueir river, which can be attributed to climatic conditions that were more favorable to the development cycles of benthic macro-invertebrates.

5

Water Quality Assessment of the Morava e Binçës River Based on the Physicochemical Parameters and Water Quality Index

88%

Musliu M. , Bilalli A. , Durmishi B. , Ismaili M. , Ibrahimi H.

Journal of Ecological Engineering

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2018

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tom Vol. 19, nr 6

104--112

EN

The quality of surface waters is being impacted by the anthropogenic and natural pollution, thus limiting the usage of this water for drinking, industry, agriculture, recreation and other purposes. The water quality indices are intended to provide a single value for the water quality of a source or a stream that reduces the large amount of parameters in a simpler expression and enables an easy interpretation of the monitoring data. During 2017, seventeen physicochemical parameters were measured in spring, summer, autumn and winter, in five locations along the Morava e Binçës River in Kosovo. For the assessment we employed the Water Quality Index (WQI) which uses the physicochemical parameters for the evaluation of the water quality. The findings of this study ascertain that MB1 station had the best quality with a value of WQI 88 and is classified in the Good Category, whereas the lowest quality of water was found on in MB4 station with a value of WQI 65 and it is thus classified in the Fair Category. Finally, the average WQI was calculated for the entire measurement period and it resulted in a value of 77.60 indicating that the Morava e Binçës River waters belong to the Fair Category.

6

Evaluation of water quality index for drinking water

88%

Damo R. , Icka P.

Polish Journal of Environmental Studies

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2013

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tom 22

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nr 4

EN

The aim of this study is to determine the quality of drinking water in the city of Pogradec, Albania. Daily samples were taken from six fixed points in the city. They were analyzed based on the standard methods for the following parameters: taste, odor, temperature, pH, conductivity (EC), turbidity, NO-3, NO-2, NH+4, chloride, and microbial load. The assessment of water quality was made using the water quality index (WQI) of the Canadian Council of Ministries of the Environment (CCME). The calculated value of CCME WQI by 87.81 indicates that the drinking water quality in the city of Pogradec is “good,” and that turbidity is the main problem in quality.

7

Influence of hydrochemical conditions on diatoms in a limnocrenic spring

88%

Zelazna-Wieczorek J. , Ziulkiewicz M.

Oceanological and Hydrobiological Studies

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2007

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tom 36

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nr Suppl.1

8

New record of Geissleria declivis (Hust.) Lange-Bert. (Bacillariophyceae) in Europe, the first in Poland

75%

Noga T. , Stanek-Tarkowska J. , Pajaczek A. , Peszek L.

Oceanological and Hydrobiological Studies

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2013

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tom 42

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nr 4

9

Functional properties of neem oil as potential feedstock for biodiesel production

75%

Bhandare P. , Naik G. R.

International Letters of Natural Sciences

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2015

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tom 07

EN

Fossil fuel resources are decreasing daily while biodiesel fuels are attracting increasing attention worldwide as blending components or direct replacements for diesel fuel in vehicle engines. In this experiment the seed oils of 30 Neem (Azadirachta indica. A. juss) biotypes were screened and evaluated for their physio-chemical parameters for oil content, biodiesel yield, density, viscosity, iodine value , free fatty acid and saponification value. Hence the neem seed oil tested in this current study could be the potential sources of raw material for biodiesel production.

10

Drinking Water Quality Assessment in the Suhareka Municipality

75%

Kryeziu F. , Abdushi S. , Kryeziu V. , Mazreku F. , Bytyqi A. , Gashi S.

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tom Vol. 24, iss. 5

195--201

EN

Reliable access to safe drinking water is one necessity for humans to live without concern for major health risks. The overall goal of this research is to analyze some physic-chemical and bacteriological parameters aspects of the quality of water for human consumption. In this study, water samples were collected from January to May month of 2022 from 25 stations throughout at Suhareka Region. Considering the results of the analysis, in terms of physic-chemical the water is within the required standards, while bacteriologically it found samples with the presence of bacteria, which are the result of carelessness, old installations, or even irresponsible disinfection. Officials of Suhareka Municipality must increase the monitoring of the work in the water disinfection or chlorination process.

11

Evaluation of meat and milk from sheep of different breeds and their crosses, kept under ecological conditions

75%

Kawecka A. , Paraponiak P.

Annals of Animal Science

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2006

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tom 06

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nr 2

12

Anthropogenic Activities Impact on the Physicochemical and Bacteriological Quality of Water in Dayat Roumi Lake, Morocco

75%

Ihsane O. , Zahra E. , Imad A. , Mohammed E. , Abdeslam A. , Mohamed F.

Ecological Engineering & Environmental Technology

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2022

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tom Vol. 23, iss. 4

162--172

EN

Dayat Roumi Lake, a vast body of permanent and shallow water in Morocco, is exposed to urban, tourist, and agricultural constraints. This human intervention can lead to microbial pollution of the lake ecosystem, hence the need to assess this contamination. For this reason, we undertook in this study an evaluation of the microbiological quality of the lake’s water. Thus, seasonal water samples were taken at eight selected stations, taking into account the reception sites of the tributaries and anthropic activities. The parameters determined were: temperature, pH, dissolved oxygen (DO), electrical conductivity, biological oxygen demand (BOD), chemical oxygen demand (COD), ammonium, nitrates, orthophosphates, total phosphate, total coliforms, fecal coliforms and fecal streptococci. The results reveal: (1) A high water conductivity exceeding the admissible value recommended by the Moroccan standard; (2) A significant presence of coliforms and fecal streptococci, in dry periods, exceeding the standards set by the WHO, which could be attributed to a summer temperature favorable to the development of coliforms. This fecal contamination leads to an increased consumption of dissolved oxygen (high BOD and low DO values) explaining the fish mortality in this period of the year; (3) The principal component analysis identified the sources of water quality degradation as domestic sewage, agricultural run-off, domestic waste, and human and animal excreta; (4) The hierarchical analysis divided the sampling stations into three different clusters. The results of the microbiological quality index classified the waters from not to highly polluted. Station 4 was classified as the most polluted site. The results of the COD/BOD ratio showed a spatial and temporal heterogeneity of the biodegradability of the oxidizable matter present in the lake waters.

13

Study of Physicochemical and Bacteriological Quality of Treated Wastewater by the New Aourir Plant (Southwestern of Morocco) Using Activated Sludge Technology in a Semi-Arid Region

75%

Hajji S. , Ait Alla A. , Noureddine S. , Haddad M. B. , Moukrim A.

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tom Vol. 22, nr 6

83--98

EN

In order to use the purified wastewater for the irrigation of a golf course in the Taghazout area (Southwestern of Morocco), this study was conducted to evaluate the physicochemical and bacteriological quality of the treated wastewater in the new Aourir plant (Activated Sludge technology). In order to achieve these objectives, three types of water were analyzed: raw water (RW), biologically treated water (BTW) and water treated by ultraviolet radiation (UV-TW). The physicochemical parameters analyzed were Temperature, pH, Electrical Conductivity (EC), Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), five-day Biological Oxygen Demand (BOD5), Total Suspended Solids (SS), Nitrate (NO3), and Orthophosphates (PO4). Otherwise, the analyzed biological parameters are Total Coliforms (TC), Fecal Coliforms (FC), Escherichia coli (E. coli), and Fecal Streptococci (FS). The physicochemical parameters showed that temperature is always lower than 30°C, the pH is close to neutrality and a strong fluctuation of the high electrical conductivity (2700 μS/cm) occurs in UV-TW. At all stages of wastewater treatment, COD, BOD5, SS, NO3 and PO4 were below the limit values recommended by Moroccan standards. The bacteriological results showed a high level of bacterial contamination in RW and BTW, but in UV-TW the loads did not exceed 3 log10. The average loads of TC, FC, E. coli and FC in UV-TW were 2.13, 1.67, 1.77, and 2 (log10 CFU/100ml) respectively. Activated sludge treatment combined with UV has demonstrated sufficient quality to reuse treated water in irrigation; however, the UV treatment requires control to avoid any effect on the microbiological and physicochemical quality of green spaces and groundwater.

14

Assessing Water Quality of Kufranja Dam (Jordan) for Drinking and Irrigation: Application of the Water Quality Index

75%

Abualhaija M. M. , Mohammad A.-H.

Journal of Ecological Engineering

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2021

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tom Vol. 22, nr 9

159--175

EN

The current study was undertaken to assess the physicochemical quality of the Kufranja dam (KD) surface water in northern Jordan during the summer and winter seasons [2019]. The samples were analyzed for temperature, pH, dissolved oxygen, conductivity, major cations, major anions, and heavy metals. Most of the physicochemical parameters exhibited a similar spatial distribution, where the maximum concentrations were observed at the dam’s entrance, while the minimum concentrations were recorded at the dam’s end. This indicates that the factors affecting their occurrence and distribution are the same, including natural discharges from the surrounding catchment areas, weathering products, agricultural activities, and wastewater effluents that enter the dam via Wadi Kufranja. All the physicochemical parameters and heavy metals in KD water lie below the maximum permissible levels of the Jordanian and international standards for drinking and irrigation, except for EC values that are above WHO standards for drinking. The application of the water quality index (WQI) depicts that the KD water is chemically unsuitable for use in drinking and needs proper treatment before use. The irrigation indices (SAR, Na%, and MH) indicate that the KD water is chemically suitable for irrigation, whereas EC results and USSL diagram showed that the dam’s water is suitable for irrigation and belongs to the categories of good to permissible for irrigation. Therefore, KD water is suitable for irrigation of most soils (except soils with low salt tolerance). Crops with good salt tolerance are recommended and a special treatment of salinity might be required.

15

Antioxidant properties of honey from different altitudes of Nepal Himalayas

75%

Neupane B. P. , Malla K. P. , Kaundinnyayana A. , Poudel P. , Thapa R. , Shrestha S.

Polish Journal of Food and Nutrition Sciences

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2015

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tom 65

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nr 2

EN

Twenty two multifloral honey samples representing central western parts of Nepal were examined spectrophotometrically for their antioxidant properties and total phenol content. The modified Folin-Ciocalteu method was used to determine total phenol content and 2,2-diphenyl-1-picrylhy-drazyl radicals (DPPHO assay for antiradical activity. In all samples, physicochemical parameters like moisture, reducing sugar, sucrose, ash, free acidity and water insoluble matter were also measured according to harmonized methods of the International Honey Commission (IHC). The results of physicochemical analysis showed that all the values, except for moisture of a small number of high altitude honey samples, are in good agreement with the current Nepalese standard. The total phenolic contents of honey, collected from high and low altitude, ranged from 154.87 to 41.90 mg gallic acid equivalent (GAE/100 g) respectively, at corresponding antiradical activity using DPPH expressed as percent inhibition of 76.66% and 25.69%. The IC50 values of selected high altitude honey samples ranged from 56 to 72 mg/mL. The total antioxidant properties were correlated (P<0.01) between total phenol content and antiradical activity (r=0.992). The obtained results demonstrate that the Nepalese honey collected from high altitude region contained more antioxidants than honey of low altitude region.

16

Dynamics of chosen species of phyto- and zooplankton in a deep submontane dam reservoir in light of differing life strategies

75%

Wilk-Wozniak E. , Pociecha A.

Oceanological and Hydrobiological Studies

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2007

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tom 36

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nr Suppl.1

17

Winter phycoflora and physico-chemical parameters of a humic lake-stream system in the Kuznik Nature Reserve [the Wielkopolska Region, Poland]

75%

Owsianny P. M. , Sobczynski T. , Niedzielski P.

Acta Agrophysica

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2002

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tom 67

18

Effect of physicochemical parameters on zooplankton in the brackish, coastal Vistula Lagoon

63%

Paturej E. , Gutkowska A. , Koszalka J. , Bowszys M.

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nr 1

EN

This paper analyzes whether physicochemical properties significantly influence the occurrence of zooplankton in a brackish reservoir. The studies were carried out on the Vistula Lagoon in August and September from 2006 to 2009 at 32 research sites. The environmental conditions in the Vistula Lagoon varied widely. At the time of the investigation, 17 species of rotifers, six species of Cladocera, and ten species of Copepoda were noted, and the total density of plankton fauna ranged from 145 to 765 ind. dm3. Statistical analysis demonstrated a significant correlation between the occurrence of some zooplankton species and certain environmental parameters, whereas the sampling sites were grouped according to study years. The zooplankton systems recorded at the research sites in 2006 constitute the most disparate group. Thus, it can be concluded that physicochemical properties might significantly impact both individual species (depending on their environmental demands) and entire zooplankton clusters.

19

The comparison of the physicochemical parameters and antioxidant activity of homemade and commercial pomegranate juices

63%

Dzugan M. , Wesolowska M. , Zagula G. , Puchalski C.

Acta Scientiarum Polonorum. Technologia Alimentaria

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2018

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tom 17

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nr 1

20

Comparison of the physicochemical and sensory characteristics of Rhode Island Red (R-11) capons and cockerels

63%

Calik J. , Krawczyk J. , Swiatkiewicz S. , Gasior R. , Wojtycza K. , Poltowicz K. , Obrzut J. , Puchala M.

Annals of Animal Science

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2017

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tom 17

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nr 3