scholarly journals ALGAS MARINAS BENTICAS INDICADORAS DE UN AREA AFECTADA POR AGUAS DE SURGENCIA FRENTE A LA COSTA CARIBE DE COLOMBIA

2016 ◽  
Vol 9 ◽  
Author(s):  
Germán Bula Meyer
Keyword(s):  
Coastal Upwelling ◽  
Climatic Factors ◽  
Biological Indicators ◽  
Sea Bottom ◽  
Chemical Factors ◽  
The Caribbean ◽  
Relationship Of ◽  
Physical And Chemical ◽  
Counter Current ◽  
The Relationship

The present paper is the result of a study undertaken to establish the relationship of certain marine envlromental factors and the benthic flora of the Caribbean littoral of Colombia. For the purpose of this study this coastal bands has been divided in two Areas. Area 1 is found between Cabo Tiburón and the mouth of the Río Magdalena, and is characterized by warm waters with very small fluctuations of the surface temperature. Area 2 ranges from the mouth of the Río Magdalena to Castilletes, and its waters are affected by a coastal upwelling with a locality of maximum intensity at the West of Península de Guajira. As a result of the presence of this upwelling there are considerable variations in the physical and chemical factors acting upon the benthic flora, there established for very short periods or all year round, as well as determining the absence of some genera and species typical of these latitudes. The parameters used for detecting this oceanographic phenomenon are given by Díaz-Piferrer (1967 a) for Venezuela. To the biological indicators cited by this author for Venezuela, the present writer adds the brown alga Ectocarpus confervoides (Roth) Le Jolis, which was found in the area of upwelling in Colombia. A comparative study of these indicators plants with those of Venezuela is given in the present paper. Similarities and differences were found to be caused by the over-run of the warm counter current on the Colombian upwelling; by the different forces of the Caribbean Current and Guayana Current, all of which lead to the related oceanographic phenomenon; tfie climatic factors; the topography of the sea bottom and the influence of the continental waters over these upwelling.

Statistical Analysis of the Factors Effect on the Zinc Coating Thickness

2013 ◽  
Vol 378 ◽  
pp. 184-189 ◽  
Author(s):  
Alena Vagaská ◽  
Miroslav Gombár ◽  
Ján Kmec ◽  
Peter Michal
Keyword(s):  
Statistical Analysis ◽  
Zinc Coating ◽  
Constant Current ◽  
Electrolyte Temperature ◽  
Constant Current Density ◽  
Zinc Plating ◽  
Chemical Factors ◽  
Relationship Of ◽  
Physical And Chemical ◽  
The Relationship

In order to improve the corrosion resistance of the material EN 355 the thickness of the zinc coating, deposited during the acid zinc plating process at a constant current density 1 A·dm-2, was monitored. The thickness of deposited coating has been investigated as the relationship of physical and chemical factors acting during the galvanic zinc plating, i.e. the electrolyte temperature, electrolyte composition (the amount of zinc, the amount of chloride and boric acid in the electrolyte), the plating time and the size of the voltage. Based on the mathematical-statistical analysis of the obtained data the suitable predicting model was developed for determining the thickness of deposited zinc coating reflecting the technological conditions of the acid zinc plating process.

scholarly journals ANALISIS KELIMPAHAN UDANG GALAH (Macrobrachium rosenbergii) DI SUNGAI MENDUK KABUPATEN BANGKA

2018 ◽  
Vol 12 (2) ◽  
pp. 1-8
Author(s):  
Bobby Fajrilian
Keyword(s):  
Correlation Coefficient ◽  
Macrobrachium Rosenbergii ◽  
Research Station ◽  
Chemical Parameters ◽  
Chemical Factors ◽  
Relationship Of ◽  
Physical And Chemical ◽  
The Relationship ◽  
Potential Level

Menduk River is a river located in Menduk Village, Mendo Barat, Bangka District. Abundance is used to measure and calculate the number of lobster that found in menduk river. It can describe the potential level of lobster present in the Menduk River. The purpose of this study is to calculate the abundance of catches of lobster and to know the parameters of physics and chemistry on menduk river then Analyze the relationship of physical and chemical factors of waters to the abundance of catches lobster. Determination of research station is done by using method of purposive sampling with correlation coefficient analysis. The catch of Galah Udang on March 11 tails and 9 tails in April. The highest correlation coefficient value of water temperature is 0.95 and the lowest value is pH 0.14. The results show that most temperatures influence the catch compared to other physical and chemical parameters.

THE INFLUENCE OF SOME PHYSICAL AND CHEMICAL PROPERTIES ON SOIL AGGREGATION AND RESPONSE TO VAMA

1966 ◽  
Vol 46 (2) ◽  
pp. 155-160 ◽  
Author(s):  
G. R. Saini ◽  
A. A. MacLean ◽  
J. J. Doyle
Keyword(s):  
Organic Matter ◽  
Soil Properties ◽  
Chemical Properties ◽  
Correlation Coefficients ◽  
Multiple Correlation Coefficient ◽  
Mean Weight Diameter ◽  
The Mean ◽  
Relationship Of ◽  
Physical And Chemical ◽  
The Relationship

The relationship of the mean weight diameter of water-stable aggregates to certain soil properties (clay, organic matter, free iron, free aluminum, and polysaccharide contents) and the relationship of the increase in aggregation caused by VAMA to the same properties of 24 New Brunswick soils were evaluated by correlation and regression analyses.Simple correlation coefficients relating aggregation to soil properties indicated that organic matter (r = 0.627), polysaccharides (r = 0.602), and aluminum (r = 0.679) were the most important factors. However, when the influence of each factor was separated by partial correlation, the coefficients were not significant. On the other hand, the combined effects of all factors as indicated by the multiple correlation coefficient (r = 0.743) was significant at the 1% level. The effect of the same soil properties on response to VAMA, as shown by increase in mean weight diameter, indicated that clay exerted the greatest influence. The relationship with other factors was nonsignificant.

scholarly journals Research of the Parameters of the Hydropower Potential of the Toktogul Hydroelectric Power Station

2021 ◽  
Vol 7 (5) ◽  
pp. 286-291
Keyword(s):  
Climatic Factors ◽  
Hydroelectric Power Station ◽  
Kyrgyz Republic ◽  
Hydroelectric Power ◽  
Power Station ◽  
Hydropower Potential ◽  
Weather Changes ◽  
Relationship Of ◽  
The Relationship

This work is devoted to the theoretical study of the relationship of hydroelectric power parameters of the hydroelectric power Station with weather changes in natural and climatic factors on the territory of the hydraulic cascades of the Kyrgyz Republic and the determination of the potential of the Toktogul reservoir of the Kyrgyz Republic.

scholarly journals ANALYSIS OF CAUSING FACTORS ON THE APPEARANCE OF HABS IN COASTAL WATER OF MAKASSAR

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Rahmadi Tambaru ◽  
Yayu A. La Nafie La Nafie ◽  
Astrid W. Junaidi
Keyword(s):  
Coastal Water ◽  
Coastal Waters ◽  
Experimental Methods ◽  
Optimal Conditions ◽  
Influence Of Temperature ◽  
Chemical Factors ◽  
Physical And Chemical ◽  
The Relationship

HABs were types of phytoplankton considered dangerous in the sea. Its appearance was triggered by an increase in nutrients and the presence of physical and chemical factors in the optimal conditions to support its growth. For that reason, research on the analysis of the causes of the emergence of HABs in the coastal waters of Makassar has been carried out. The implementation is carried out from March to June 2017 using non-experimental methods. The results showed that there were seven types of HABs, such as Protoperidinium, Gymnodinium, Ceratium, Prorocentrum, Gyrodinium, Gonyaulax, and Dinophysis. That types from the Dinophyceae Class. The appearance of the types of HABs was due to the influence of temperature with the relationship were very strong and positive.

Pronamide Phytotoxicity in Ten Wisconsin Soils

Weed Science ◽  
1980 ◽  
Vol 28 (4) ◽  
pp. 429-432 ◽  
Author(s):  
T. E. Dutt ◽  
R. G. Harvey
Keyword(s):  
Organic Matter ◽  
Chemical Properties ◽  
Clay Content ◽  
Exchange Capacity ◽  
Fresh Weight ◽  
Relationship Of ◽  
Physical And Chemical ◽  
Mg Content ◽  
The Relationship ◽  
And Chemical Properties

Pronamide [3,5-dichloro-(N-1, 1-dimethyl-2-propynyl) benzamide] phytotoxicity was compared in 10 Wisconsin soils and the relationship of activity to soil physical and chemical properties appraised. Twelve soil properties were measured and correlated with pronamide I50(50% fresh weight inhibition) values using oats (Avena sativaL. ‘Portal’) as the indicator plant in bioassays conducted under greenhouse conditions. Organic matter was the soil variable most inversely correlated with pronamide phytotoxicity. Cation exchange capacity, field moisture capacity, and Mg content were also inversely correlated with pronamide phytotoxicity, but probably reflect changes in soil organic matter levels. Clay content did not significantly affect pronamide phytotoxicity.

Analysis on Relationship of Chlorophyll-a and Environmental Factors in Wuliangsuhai Lake

2012 ◽  
Vol 178-181 ◽  
pp. 804-807
Author(s):  
Zhong Feng Jiang ◽  
Chang You Li ◽  
Sheng Zhang
Keyword(s):  
System Theory ◽  
Environmental Factors ◽  
Chlorophyll A ◽  
Grey System Theory ◽  
Grey System ◽  
Connection Method ◽  
Chemical Factors ◽  
Research Relationships ◽  
Relationship Of ◽  
Physical And Chemical

Using grey system theory to research relationships between Chlorophyll-a and environmental factors in Wuliangsuhai lake was done in the present study. The effects of physical and chemical factors on chlorophyll-a in Wuliangsuhai lake, were evaluated by using of the gray connection method, providing a row order of those effects, and creating the “advantage factors” that exhibited the greatest effects on chlorophyll-a in wuliangsuhai lake, including temperature、illumination、EC、SD.

Sign in / Sign up

Export Citation Format

Share Document