Genetic polymorphism of the adult medusae invading an electric power station and wild polyps of Aurelia aurita in Wakasa Bay, Japan

2005 ◽  
Vol 85 (3) ◽  
pp. 563-568 ◽  
Author(s):  
Kiyotaka Matsumura ◽  
Kyoko Kamiya ◽  
Keiji Yamashita ◽  
Fumio Hayashi ◽  
Ikuo Watanabe ◽  
...  
Keyword(s):  
Genetic Polymorphism ◽  
Electric Power ◽  
Dna Sequences ◽  
Cooling Water ◽  
Haplotype Frequency ◽  
Aurelia Aurita ◽  
Electric Power Station ◽  
Power Stations ◽  
C Subunit ◽  
Wakasa Bay

A large quantity of the jellyfish, Aurelia aurita, invade cooling water systems and cause serious problems at several electric power stations in Japan. In the present study, we examined intra—species genetic variation of A. aurita in Wakasa Bay, Japan in order to estimate the original polyp habitat of the adult medusae invading electric power stations. Total DNA was extracted from the adult medusae and the wild polyps, and polymerase chain reaction (PCR) was performed using the specific primers for amplification of nuclear internal transcribed spacer one (ITS-1) and mitochondrial cytochrome oxidase c subunit 1 (CO1). Then the DNA sequences of the PCR products were compared. The results showed genetic polymorphism of A. aurita in Wakasa Bay and locally specific frequency of each haplotype. The haplotype frequency, especially in CO1, of the adults collected at one of the power stations in Wakasa Bay was similar to that of the polyp colonies at harbours in the embayed area, not at another harbour in the western entrance of the bay. The polymorphic analysis is, therefore, thought to be useful for the determination of original polyp habitat as source of the adult medusae in relatively limited regions such as Wakasa Bay.

Cooling Water Studies at Electric Power Station

1969 ◽  
Vol 95 (2) ◽  
pp. 293-303
Author(s):  
R. Fred Gray ◽  
J. Ben Stephenson
Keyword(s):  
Electric Power ◽  
Cooling Water ◽  
Electric Power Station ◽  
Power Station

scholarly journals Limitation of the Reservoirs’ Water Level Alteration Rate in Hydro Electric Power Stations Operational Mode Control in Accordance with Safety Rules for Water Work Facilities

2012 ◽  
pp. 65-73
Author(s):  
Keyword(s):  
Electric Power ◽  
Water Level ◽  
Electric Power Station ◽  
Operational Mode ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Water Power ◽  
Power Stations ◽  
The Impact ◽  
Water Work

The impact of the reservoir water level alterations rate limitation upon its operational mode has been studied. These limitations impact upon the hydro electric power station performance has been assessed. It has been proposed to take into consideration the level alteration rate in water/economic and water/power production calculations.

POWER SUPPLY AND ENERGY SAVING WITH RENEWABLES ENERGY SOURCES

2015 ◽  
Vol 5 (2) ◽  
pp. 88-93 ◽  
Author(s):  
Vladimir Mikhaylovich IVANOV ◽  
Irina Alekseevna BAKHTINA ◽  
Tatyana Yur'evna IVANOVA ◽  
Sergei Viktorovich ILINYKH
Keyword(s):  
Energy Saving ◽  
Electric Power ◽  
Power Supply ◽  
Axial Flow ◽  
Energy Sources ◽  
Electric Power Station ◽  
Original Design ◽  
Power Station ◽  
Remote Areas ◽  
Power Stations

Micro hydro-electric power stations with axial flow turbine of a new original design are developed as solution of the problem of power supply and energy saving of independent consumers of the decentralized and remote areas. Researches of micro hydro-electric power station with axial flow turbine are executed, key indexes are measured by the authors of this article. During tests the experimental working model of micro hydro-electric power station with the axial flow turbine confirmed all declared calculated indexes within the accuracy of experiments (5-10%). The micro hydro-electric power station can effectively be used for power supply and energy saving of independent consumers.

scholarly journals Copper Pollution of Soils Located Into The Influence Area of Thermo-Electric Power Stations Doiceşti and Rovinari

2011 ◽  
Vol 68 (2) ◽  
Author(s):  
Claudia Elena BALACEANU ◽  
Anca Rovena LĂCĂTUŞU
Keyword(s):  
Electric Power ◽  
Coal Combustion ◽  
Point Of View ◽  
Electric Power Station ◽  
Thermo Electric ◽  
Secondary Sources ◽  
Power Stations ◽  
Influence Area ◽  
Parental Material ◽  
Zonal Soils

Some of the most complex polluters of the environment are thermo-electric power stations that are using coal as energy source. There are two types of environmental pollution sources: the main are baskets exhaust gases of coal combustion, so called high sources, and the secondary sources that are ash dumps resulted from the coal combustion activities, so called low sources. Thermo-electric power station Doicesti, located in the area of Sub-Carpathian hills, on Ialomiţa Valley, is a major source of environment pollution with sulphur, since 1952 when was built. By geographically point of view, the studied territory can be included into Sub-Carpathians’ Curvature, more specify in the Prahova’s Sub-Carpathian subunit.Pedogenesis factors: rock, topography and parent matherial, have led the evolution of isolated, lythomorphic soils. In the investigated territory four soil classes: Luvisols, Cambisols, Vertisols and Protisols were identified, each of them with types and subtypes mentioned in the paper.From the geomorphological viewpoint, thermo-electric power stations Rovinari belongs to the Câlnic-Câmpul Mare inter-hilly depression whose altitude, at the Rovinari, is 150 m. The soil forming factors causing the soil evolution have been the rock, parental material and relief, all of them determining the evolution of lithomorphic zonal soils. The soils in the analyzed area represented by the classes: luvisols, hydrisols, cambisols and protisols.The subject of this paper is to analyze the loading degree of copper of the soils affected by emissions from thermo-electric power stations Doiceşti and Rovinari. Soil samples collected soil profiles distributed in all cardinal directions, were analyzed for pH, cooper contens. In the investigated area, cooper pollution of soils, caused by cooper emissions from thermo-electric power stations Doicesti and Rovinari, were recorded. The cooper pollution phenomenon gathering way by changing the normal content of soil, plant, and consequently, could affecting the health of the inhabitants of this territory.

Genetic polymorphism and population structure ofEchinococcus ortleppi

Parasitology ◽  
2016 ◽  
Vol 144 (4) ◽  
pp. 450-458 ◽  
Author(s):  
F. ADDY ◽  
M. WASSERMANN ◽  
F. BANDA ◽  
H. MBAYA ◽  
J. ASCHENBORN ◽  
...  
Keyword(s):  
Genetic Polymorphism ◽  
South America ◽  
Southern Africa ◽  
Dna Sequences ◽  
Intraspecific Variability ◽  
Sensu Stricto ◽  
Sub Saharan Africa ◽  
Geographical Regions ◽  
Sub Saharan ◽  
Eastern And Southern Africa

SUMMARYThe zoonotic cestodeEchinococcus ortleppi(Lopez-Neyra and Soler Planas, 1943) is mainly transmitted between dogs and cattle. It occurs worldwide but is only found sporadically in most regions, with the notable exception of parts of southern Africa and South America. Its epidemiology is little understood and the extent of intraspecific variability is unknown. We have analysed in the present study the genetic diversity among 178E. ortleppiisolates from sub-Saharan Africa, Europe and South America using the complete mitochondrialcox1(1608 bp) andnad1(894 bp) DNA sequences. Genetic polymorphism within the loci revealed 15cox1and sixnad1haplotypes, respectively, and 20 haplotypes of the concatenated genes. Presence of most haplotypes was correlated to geographical regions, and only one haplotype had a wider spread in both eastern and southern Africa. Intraspecific microvariance was low in comparison withEchinococcus granulosussensu stricto, despite the wide geographic range of examined isolates. In addition, the various sub-populations showed only subtle deviation from neutrality and were mostly genetically differentiated. This is the first insight into the population genetics of the enigmatic cattle adaptedEchinococcus ortleppi. It, therefore, provides baseline data for biogeographical comparison amongE. ortleppiendemic regions and for tracing its translocation paths.

Content and distribution of239,240Pu in the topsoil and plants of the near zone of the leningrad atomic electric power station

Atomic Energy ◽  
1993 ◽  
Vol 74 (6) ◽  
pp. 478-481 ◽  
Author(s):  
T. A. Goryachenkova ◽  
F. I. Pavlotskaya ◽  
I. E. Kazinskaya ◽  
K. V. Barsukova ◽  
V. V. Emel'yanov ◽  
...  
Keyword(s):  
Electric Power ◽  
Electric Power Station ◽  
Power Station ◽  
Near Zone ◽  
Atomic Electric Power Station

Discussion on “An investigation as to the most economical vacuum in electric power stations employing steam turbines and cooling towers”

1910 ◽  
Vol 44 (201) ◽  
pp. 687-688
Author(s):  
J.A. Robertson ◽  
G.L. Black ◽  
S.A. Simon ◽  
W.B. Sayers ◽  
M.G.S. Swallow ◽  
...  
Keyword(s):  
Electric Power ◽  
Cooling Towers ◽  
Steam Turbines ◽  
Power Stations
Sign in / Sign up

Export Citation Format

Share Document