scholarly journals An Investigation of the Quality of Underground Water at Eloor in Ernakulum District of Kerala, India

2010 ◽  
Vol 7 (3) ◽  
pp. 908-914 ◽  
Author(s):  
A. G. Umadevi ◽  
M. George ◽  
P. Dharmalingam ◽  
Jose P. Abraham ◽  
M. Rajagopalan ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Underground Water ◽  
Quality Characteristics ◽  
Physical And Chemical Properties ◽  
Ph Values ◽  
Upper Limit ◽  
Major Cations ◽  
Physical And Chemical ◽  
And Chemical Properties

The physical and chemical properties of groundwater in Eloor, an industrial region, have been investigated to evaluate the extent of pollution. The study area was divided into four zones and a total of 40 water samples from different locations were collected, analyzed and correlation analysis has been carried out among the measured parameters. A comparison of the observed parameters with the limits prescribed by BIS revealed that in some area pH values are lower than the prescribed limit. The concentration of the major cations and anions were found to be significant. Magnesium and chloride exceed the desirable limit in some areas but less than the upper limit prescribed by BIS. Significant linear relationship was observed between pH, electrical conductivity, alkalinity, hardness, Ca2+, Mg2+and chloride. The importance of these parameters in predicting the quality characteristics of groundwater is discussed.

scholarly journals Effect of Bentonite on the Pelleting Properties of Iron Concentrate

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Hao Liu ◽  
Bing Xie ◽  
Yue-lin Qin
Keyword(s):  
Water Absorption ◽  
Chemical Properties ◽  
Poor Quality ◽  
Physical And Chemical Properties ◽  
Iron Concentrate ◽  
Green Ball ◽  
Shock Temperature ◽  
Physical And Chemical ◽  
And Chemical Properties

The physical and chemical properties such as particle size, montmorillonite content, swelling degree, water absorption, and blue absorption of A, B, and C bentonites were studied under laboratory conditions. The effects of adding different quality and different proportion of bentonite on falling strength, compression strength, and shock temperature of green pellet were investigated. The experimental results show that the montmorillonite content, water absorption, and methylene blue absorption of bentonite-B are the highest. And the quality of bentonite-B is the best, followed by bentonite-C and bentonite-A poor quality. When the amount of bentonite-B reduced from 1.5% to 1.0%, the strength of green pellets and the shock temperature both decrease. As the same proportion of A, B, and C bentonites, the green-ball strength and shock temperature are as follows: bentonite-A > bentonite-B > bentonite-C.

scholarly journals Studi kesesuaian kualitas perairan tambak ikan bandeng (Chanos chanos) di Kawasan Ekowisata Mangrove Sungai Tatah

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Doni Irawan ◽  
Leni Handayani
Keyword(s):  
Data Analysis ◽  
Research Methods ◽  
Water Samples ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Chanos Chanos ◽  
Minimum Requirements ◽  
Physical And Chemical ◽  
And Chemical Properties

The research objective was to determine the quality of the milkfish pond waters (Chanos chanos) in the Tatah River Mangrove Ecotourism Area. This research was conducted from March to May 2020. Purposive sampling was one of the research methods used to collect data. Water samples were taken once a week (in the morning, afternoon and evening) from six sampling stations. The parameters observed included the physical and chemical properties of the waters. The data analysis used was scoring. The results of the research on the level of quality suitability of pond waters in the Tatah River Mangrove Ecotourism Area indicated that station 2, and 4 were very suitable level of conformity (S1) meaning that it is potential station while station 1, 3, 5 and 6 were quite appropriate (S2) which means that the areas meet the minimum requirements for use in milkfish (C. chanos) cultivation

The comparison of rapeseeds’ oils from hybrid and open-pollinated varieties by their heating values in the aspect of Diesel utilization

2010 ◽  
Vol 1 (1) ◽  
pp. 157-161
Author(s):  
E. Sarkozi ◽  
L. Janosi
Keyword(s):  
Energy Content ◽  
Methyl Esters ◽  
Research Work ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Heating Value ◽  
Biofuel Feedstock ◽  
Physical And Chemical ◽  
And Chemical Properties

The rape is one of the suitable plant species for biofuel feedstock in Hungary. Currently there are over 100 admitted rape sorts recorded in Hungary and their oils’ application as biodiesel proposes new aspects of evaluation. From references it is noticeable that there are differences in the physical and chemical properties of the various rape sorts’ oils and rapeseed-methyl-esters. Our aim is to analyze the differences in the quality of the various rape sorts’ oils and to determine the most appropriate rape sort in the viewpoint of technical utilization. In the course of present research work we have measured the heating values of 21 various rapesorts’ oils -12 from open-pollinated varieties and 9 from hybrids- and examined the differences between them. The outcome values dispersed in the range of the heating values found in the references, but the differences between them are less then the predicted, the variance and the coefficient of variation are reasonably slight, so the examined rape sorts’ oils are similar in the viewpoint of the heating value. Furthermore, the energy content of the rapeseed oils is independent of the type (hybrid or open-pollinated variety) of the plant.

scholarly journals INITIAL GROWTH OF SEEDLINGS OF Eucalyptus dunnii Maiden AS INFLUENCED BY THE ADDITION OF NATURAL POLYMER AND FARMING SUBSTRATES

2016 ◽  
Vol 40 (4) ◽  
pp. 627-637
Author(s):  
Marcio Carlos Navroski ◽  
Maristela Machado Araujo ◽  
Lia Rejane Silveira Reiniger ◽  
Claudimar Sidnei Fior ◽  
Gilmar Schafer ◽  
...  
Keyword(s):  
Dry Matter ◽  
Chemical Properties ◽  
Initial Growth ◽  
Physical And Chemical Properties ◽  
Natural Polymer ◽  
Eucalyptus Dunnii ◽  
Physical And Chemical ◽  
Neck Diameter ◽  
And Chemical Properties

ABSTRACT This study aimed to test different concentrations of natural polymer combined with different substrates in order to maximize the production and quality of Eucalyptus dunnii Maiden as well as the influence of the physical and chemical properties of the substrates. Experiments were conducted in a greenhouse in a randomized design with a 4 x 4 factorial arrangement for different substrates (factor "A") and water-retaining polymer concentrations (factor "B"). The physical and chemical properties of the substrates were also analyzed in each treatment. The seedlings height (H), neck diameter (D), shoot dry matter (SDM), root dry matter (RDM), total dry matter (TDM), H/D ratio and Dickson quality index (DQI) were measured after 90 days of sowing. Both the physical and chemical properties of the substrates have improved by the addition of hydrogel, especially those regarding to porosity, water availability and water holding capacity. In general, the water-retaining polymer concentrations of 2 and 4 g L-1 provided a better seedling growth. Seedlings largest neck diameter was observed at a hydrogel concentration of 6 g L-1. The use of hydrogel has resulted in higher height and neck diameter values when carbonized rice hulls were used as substrate. Therefore, hydrogel concentrations of 2 and 4 g L-1 may increase the quality of Eucalyptus dunnii seedlings and reduce their nursery time.

Impact of Insufficient Cleaning on the Quality of Molybdenum Layer Applied by Thermal Spraying

2013 ◽  
Vol 801 ◽  
pp. 35-40
Author(s):  
Marián Bujna ◽  
Miroslav Prístavka ◽  
Pavol Kaplík
Keyword(s):  
Erosion Resistance ◽  
Thermal Spraying ◽  
Chemical Properties ◽  
Poor Quality ◽  
Physical And Chemical Properties ◽  
High Degree ◽  
Physical And Chemical ◽  
The Impact ◽  
And Chemical Properties

Thermal spraying influences several physical and chemical properties of the coating surface. The most important of them are hardness, density, porosity, corrosion resistance and adhesion. This technology of surface treatment of material is often used for its high degree of hardness. Hardness and erosion resistance are the parameters that need to be achieved particularly in working conditions where there is excessive component wear. In this paper, we deal with the impact of purifying on the quality of molybdenum layer. Insufficient cleaning may result in a poor quality of the sprayed layer. Our aim is to measure and analyse the quality of molybdenum layer thickness applied by thermal spraying after insufficient cleaning.

scholarly journals Influence of the Addition of Calcium Hydroxide Powder on Some Physical and Chemical Properties of the Sealer MTA Fillapex

2012 ◽  
Vol 3 (2) ◽  
pp. 180-183
Author(s):  
Marcelo Ferrarezi de Andrade ◽  
Renato de Toledo Leonardo ◽  
Edson Alves de Campos ◽  
Milton Carlos Kuga ◽  
Marco Antonio Hungaro Duarte ◽  
...  
Keyword(s):  
Calcium Hydroxide ◽  
Calcium Release ◽  
Ph Value ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Ph Values ◽  
The One ◽  
Physical And Chemical ◽  
The Impact ◽  
And Chemical Properties

ABSTRACT Objective This study evaluated the flow, pH and calcium release of MTA Fillapex (G1) or Fillapex plus 10% in weight of calcium hydroxide powder (G2), compared to AH Plus (G3) and Sealapex (G4). Materials and methods The flow test was performed according to ISO 6876:2001 requirements. The sealers were placed into plastic tubes and immersed in deionized water. After 24 hours, 7, 14 and 28 days, the water of each tube was removed and tested to evaluate the pH values and the level of released calcium. Calcium release values were analyzed statistically by Kruskal Wallis and Dunn tests and pH values analyzed by ANOVA and Tukey tests (α = 5%). Results G1 presented higher flow among all sealers. The addition of 10% calcium hydroxide into MTA Fillapex reduced the flow (p < 0.05) but, in a level, that is lower than the one recommended for ISO norms. G2 and G4 presented pH values and calcium release higher than G3 (p < 0.05) in all periods. G1 presented pH value higher than G3 (p < 0.05), except in 7 days period (p > 0.05). G4 presented higher pH values than G1 and G2, but the calcium release was similar for all periods (p > 0.05). G3 presented lower calcium release among all groups (p < 0.05). Conclusion The addition of 10% calcium hydroxide in MTA Fillapex caused reduction in flow and no negative interference in pH and/or calcium release. However, the obtained flow is different from ISO requirements. Clinical relevance MTA Fillapex presents levels of flow above the ISO norms. The addition of calcium hydroxide is a suggestion for solving this problem, but the impact of these procedures should be carefully evaluated. How to cite this article Keine KC, Guiotti FA, Leonardo RT, Kuga MC, Duarte MAH, de Campos EA, de Andrade MF. Influence of the Addition of Calcium Hydroxide Powder on Some Physical and Chemical Properties of the Sealer MTA Fillapex. World J Dent 2012;3(2):180-183.

scholarly journals Substratos no desenvolvimento de cultivares de gérbera envasada

2015 ◽  
Vol 21 (2) ◽  
pp. 177
Author(s):  
Fernanda Ludwig ◽  
Dirceu Maximino Fernandes ◽  
Amaralina Celoto Guerrero ◽  
Roberto Lyra Villas Bôas
Keyword(s):  
Dry Matter ◽  
Ornamental Plants ◽  
Chemical Properties ◽  
Dry Mass ◽  
Chemical Characteristics ◽  
Physical And Chemical Properties ◽  
Ph Values ◽  
Aerial Parts ◽  
Physical And Chemical ◽  
And Chemical Properties

The gerbera is a prominent culture that has gained in the Brazilian market of flowers and ornamental plants and there is a great demand for adequate substrates for its production. This study was conducted to evaluate the growth and distribution of dry mass and nitrogen in potted gerbera, depending on the substrates and cultivars. Experimental design was randomized blocks in a 5x2 factorial arrangement (5 substrates and 2 cultivars). Red and Cherry cultivars were evaluated at 1, 15, 29, 43 and 50 days of acclimation (DAA) to the leaves number, leaf area, dry mass of aerial parts (leaf and flower) and accumulation of nitrogen. From 29 DAA, the inflorescence has established as the drain and has contributed significantly to the total dry mass. The accumulation of nitrogen was similar in vegetative and reproductive periods. The traits evaluated varied depending on the substrate used, influenced by physical and chemical properties of the same. The growth, dry matter and nitrogen distribution potted gerbera cultivars Cherry and Red are influenced by physical and chemical characteristics of substrates, with better results in substrates with bulk density of less than 530 kg m-3 and pH values between 5.5 and 6.8

scholarly journals Solutions to Pollution Problems of Oil

2017 ◽  
Vol 21 (2) ◽  
pp. 5-14
Author(s):  
Andesh Abdrakhmanov ◽  
Berikbay Orazaliyev ◽  
Beibut Zhusin ◽  
Symbat Tynysbekova ◽  
Barbara Krzysztofik
Keyword(s):  
Chemical Properties ◽  
Petroleum Products ◽  
Quality Parameters ◽  
Physical And Chemical Properties ◽  
Motor Oil ◽  
Theoretical Level ◽  
Analysis And Synthesis ◽  
Physical And Chemical ◽  
And Chemical Properties

AbstractThe purpose of the research is to improve the processes of conservation indicators of quality petroleum products (POL). As a hypothesis, it was assumed that the quality of fuel depends on its main quality parameters that most strongly vary during storage and transportation. The methods were applied which are used at the theoretical level of research, such as abstraction, deduction, analysis and synthesis, etc. We presented the main problems of pollution of oil. Moreover, we provided indicators of physical and chemical properties of diesel fuel and motor oil, which characterize their performance and the list of used additives. We analysed the scientific and patent work. We provided solutions to the problem. Correct storage and use of fuel will help maintain its quality parameters and ensure safety and durability of machinery.

scholarly journals Karakteristik Fisika dan Kimia Perairan di Laut Jawa – Ambang Dewakang

2019 ◽  
Vol 4 (1) ◽  
pp. 41
Author(s):  
Hanny Meirinawati ◽  
Mochamad Riza Iskandar
Keyword(s):  
Sea Water ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Mixing Processes ◽  
Java Sea ◽  
Aquatic Productivity ◽  
Physical And Chemical ◽  
Temperature Depth ◽  
And Chemical Properties

<strong>Physical and Chemical Properties of Waters in Java – Ambang Dewakang Sea</strong>.The Java Sea is a region of important pelagic fish production in Indonesia. The distribution of abundance of fish is affected by changes in water physical and chemical properties. The important chemical property that can affect the abundance of the fish is the availability of nutrients. Nutrients are the basic compounds of marine biogeochemical cycles that play important role in increasing aquatic productivity through growth of the phytoplankton. The purposes of this study are to know recent condition of chemical and physical characteristics of the sea water within the region Java Sea ‒ Ambang Dewakang and to investigate relationships among these parameters. This research was conducted in November 2014 at 7 stations in the region. The observed parameters were physical (temperature, salinity, turbidity, density) and chemical such as nutrients (DIN, PO<sub>4</sub>-P, SiO<sub>3</sub>-Si), pH, and DO. CTD (<em>Conductivity-Temperature-Depth</em>) SBE (<em>Sea Bird Electronics</em>) 911 Plus was used to measure water physical properties. Water sample was collected using Rosette sampler, while analysis of nutrients concentration employed methods from Strickland and Parsons 1972. The result showed that temperatures in the Java Sea ranged from 13.06 – 30.33 °C with an average of 25.29 °C, whereas salinity ranged between 33.07 – 34.74 psu with an average of 34.41 psu. Variations within temperature and salinity showed a homogeneous condition due to the influence of mixing processes. Concentration range of DIN (NO<sub>3</sub>-N+NO<sub>2</sub>-N+NH<sub>4</sub>-N), PO<sub>4</sub>-P, SiO<sub>3</sub>-Si were from 0.070 to 0.180 mg/L, from 0.004 to 0.022 mg/L and from 0.082 to 0.361 mg/L, with an average of 0.096 mg/L, 0.010 mg/L, and 0.159 mg/L respectively. The ratio DIN/DIP of 13.24 showed that the waters quality of Java Sea was in the moderate category.

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