Conquering control in a harsh environment [industrial sand mining]

2007 ◽  
Vol 18 (2) ◽  
pp. 44-45
Keyword(s):  
Harsh Environment ◽  
Sand Mining ◽  
Industrial Sand

scholarly journals BOTTOM FAUNA OF LAKE DONUZLAV UNDER CONDITIONS OF INDUSTRIAL SAND MINING

Ekosistemy ◽  
2021 ◽  
pp. 5-22
Author(s):  
N. K. Revkov ◽  
N. A. Boltacheva ◽  
T. N. Revkova ◽  
L. V. Bondarenko ◽  
S. V. Schurov ◽  
...  
Keyword(s):  
Benthic Fauna ◽  
Water Area ◽  
Bottom Fauna ◽  
Sand Mining ◽  
Soft Bottom ◽  
Dominant Group ◽  
Average Abundance ◽  
Local Impact ◽  
Mytilaster Lineatus ◽  
Industrial Sand

In 2019, the composition and quantitative representation of the zoobenthos in Donuzlav Lake, in the area of fine sediment discharge after the sand mining, and in the adjacent water area were studied. The accounting of the macrozoobenthos at the species level and of the meiobenthos at the major taxa level indicates the presence of a typical Pontic bottom fauna in the Lake, which has developed over 58 years of it existence. The benthic macrofauna was represented by a biocoenosis of Chara algae with Mytilaster lineatus, existing in a two-tier biotope – of a soft-bottom and of a Chara algaes developing on it. The epiphyton macrofauna quantitatively dominated the benthic macroinfauna. A total of 102 species and 7 superspecies taxa of the macrozoobenthos were registered in the identified biocoenosis. That increases the overall level of the macrozoobenthos representation up to 171 species and 9 superspecies taxa in Donuzlav for the period since 1981. In meiobenthos 11 taxa in the rank of type were recorded. The abundance and biomass of the macrozoobenthos averaged 34.658±1.655 ind./m2 and 316±93 g/m2 respectively, that is comparable with the previous studies. The average abundance of meiobenthos in the bottom biotope reached 247.2×103 ind./m2. Nematodes were the dominant group in meiobenthos, followed by harpacticids, with a combined share of 81 % in total meiobenthos abundance. The local impact of the discharging finely dispersed soil fractions to the benthic fauna of the southern part of the Donuzlav Lake was revealed. There was a 12, 3.5 and 2-fold decrease in abundance, biomass and number of macrozoobenthos species respectively and a 3.2-fold decrease in meiobenthos abundance, in the discharging area compared to the neighboring water areas of the Lake.

Magnetostrictive Cold Spray Sensor for Long-Term or Harsh Environment Ultrasound

2019 ◽  
Author(s):  
S. W. Glass ◽  
◽  
J. P. Lareau ◽  
K. S. Ross ◽  
S. Ali ◽  
...  
Keyword(s):  
Cold Spray ◽  
Harsh Environment

The Valuable Impacts of Halophytic Genus Suaeda; Nutritional, Chemical, and Biological Values

2020 ◽  
Vol 16 (8) ◽  
pp. 1044-1057 ◽  
Author(s):  
Hamdoon A. Mohammed
Keyword(s):  
Search Engines ◽  
Scientific Literature ◽  
High Salinity ◽  
Chemical Constituents ◽  
Harsh Environment ◽  
Science Literature ◽  
Medicinal Uses ◽  
Nutritional Values ◽  
Alternative Medicines ◽  
Natural Substances

Background: Suaeda is a halophytic genus belonging to the Amaranthaceae family and can survive in the high salted marsh areas of the world. Suaeda plants can biosynthesize natural substances with powerful antioxidant activity and are considered as a renewable source of energy, food, and edible oil for a larger number of populations living in the harsh environment with high salinity and drought conditions. These plants also meet folk and alternative medicines' needs. Methods: The review encompasses available scientific literature related to folk medicinal uses of Suaeda plants, their nutritional values, and chemical constituents. In addition, the biological trials applied for the Suaeda plants are also part of the review. The review covers the researches from major science literature search engines and other sites representing scientific literature, i.e., Scifinder, Google Scholar, PubMed, ScienceDirect, Scopus, and Google. The searches were programmed on the advance options available in the search engines and are latest up to November 2019. The searches were exhaustive and rechecked for accuracy. Conclusion: The study summarizes the uses of Suaeda plants as a remedy for various ailments due to their contents from the polyphenols and flavonoids. The comparatively large amounts of fixed oils, minerals, and vitamins in Suaeda plants have also made them potential renewable sources for foods.

scholarly journals 2D kinematics of massive stars near the Galactic Centre

2020 ◽  
Vol 500 (3) ◽  
pp. 3213-3239
Author(s):  
Mattia Libralato ◽  
Daniel J Lennon ◽  
Andrea Bellini ◽  
Roeland van der Marel ◽  
Simon J Clark ◽  
...  
Keyword(s):  
Moving Objects ◽  
Hubble Space Telescope ◽  
Massive Stars ◽  
Line Of Sight ◽  
Galactic Centre ◽  
Harsh Environment ◽  
Proper Motions ◽  
Sgr A ◽  
Better Than ◽  
Rule Out

ABSTRACT The presence of massive stars (MSs) in the region close to the Galactic Centre (GC) poses several questions about their origin. The harsh environment of the GC favours specific formation scenarios, each of which should imprint characteristic kinematic features on the MSs. We present a 2D kinematic analysis of MSs in a GC region surrounding Sgr A* based on high-precision proper motions obtained with the Hubble Space Telescope. Thanks to a careful data reduction, well-measured bright stars in our proper-motion catalogues have errors better than 0.5 mas yr−1. We discuss the absolute motion of the MSs in the field and their motion relative to Sgr A*, the Arches, and the Quintuplet. For the majority of the MSs, we rule out any distance further than 3–4 kpc from Sgr A* using only kinematic arguments. If their membership to the GC is confirmed, most of the isolated MSs are likely not associated with either the Arches or Quintuplet clusters or Sgr A*. Only a few MSs have proper motions, suggesting that they are likely members of the Arches cluster, in agreement with previous spectroscopic results. Line-of-sight radial velocities and distances are required to shed further light on the origin of most of these massive objects. We also present an analysis of other fast-moving objects in the GC region, finding no clear excess of high-velocity escaping stars. We make our astro-photometric catalogues publicly available.

scholarly journals Thermoelectric Cooling to Survive Commodity DRAMs in Harsh Environment Automotive Electronics

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Deepak M. Mathew ◽  
Hammam Kattan ◽  
Christian Weis ◽  
Jorg Henkel ◽  
Norbert Wehn ◽  
...  
Keyword(s):  
Harsh Environment ◽  
Automotive Electronics ◽  
Thermoelectric Cooling
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