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Name
Environment. Technology. Resources.
Type
Journal
Items
457 Publications
Compatibility
OpenAIRE 3.0 (OA, funding)
OAI-PMH
http://journals.ru.lv/index.php/ETR/oai

 

  • Research Into Biological Characterictics of Dried Sapropel

    Tretjakova, Rasma; Grebeža, Jūlija; Martinovs, Andris (2015)
    Microbiological characteristics of dried sapropel of Lake Rušona and Lake Ubagova and concrete containing sapropel and hemp sheaves (Ubagova Lake) have been studied. The antimicrobial activity was studied by thereference test culturesStaphylococcus aureus  ATCC 25923, Salmonella enteritidis ATCC 13076, Enterococcus faecalis  ATCC 29212, Bacillus cereus  ATCC 10876, Escherichia coli ATCC 25922, Candida albicans ATCC 10231. Antibacterial activity on Staphylococcus aureus reference test cultures...

    Determining the Isotopic Composition of Nitrate in the River Daugava and Loads of Nitrogen to the Gulf of Riga

    Skute, Arturs; Osipovs, Sergejs; Vardanjans, Davids (2015)
    The Daugava or Zapadnaya (Western) Dvina River belongs to the Baltic Sea basin. The length of the river is 1,005 km with a drainage area of 87,900 km2. It crosses three countries: Russia (323 km and 18,500 km2), Belarus (328 km and 33,100 km2) and Latvia (352 km and 24,700 km2). Water samples were collected at three points with the following coordinates: Kraslava, Daugavpils, and Riga and distance from the river mouth 320, 255, and 20 km respectively. Discharge measurements by use of acoustic...

    ENVIRONMENTALLY SUSTAINABLE TECHNOLOGIES AND ENVIRONMENTAL QUALITY INDICATORS

    Novik, Gotfrid (2001)
    Despite the fact that environmental indicators are investigated for long time the solving o f indicators problems is far of completion yet. Paper discusses the results of investigation environmental indicators in conformity with quality of environmentally sound technologies and their impact on man's life quality. As a result o f investigations three groups of indicators were worked up: 1) for environment quality in cities - anthropogenic pressure indicators on atmosphere, water and earth, 2) ...

    EFFICIENCY OF CULTIVATION OF CEREAL - PAPILIONACEOUS MIXTURES IN ORGANIC FARMING CONDITIONS

    Agafonova, Ludmila; Jansons, Aldis; Rancāne, Sarmīte (2015)
    Cultivation of cereal-papilionaceous grass crop mixtures allows for more substantial use of soil fertility and higher harvests than in case of homogeneous sowings. In mixed sowings, legume crops do not lodge; photosynthesis and nitrogenous fixation conditions are better; losses of harvest are lower. Our research is directed to examination of interrelations between peas, spring wheat and spring barley, as well as to high harvests, balanced in proteins and amino acids. Experiments were conducte...

    Application Of The Interlaced Sweep Method For The Solution Of Problems In Field Theory

    Ratnieks, Aloizs; Uhanova, Marina (2015)
    For solution of problems in field theory the method of sweep is very popular. The authors suggest a very effective method of interlaced sweep. The essence of the interlaced sweep method lies in the fact that matrix of the linear algebraic equations system is broken into parts and the solution of separate blocks is sought by direct methods. Usually for each line of the grid a separate block is created. The system of block equations has a tridiagonal matrix where only elements of the main diago...
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