NEW ASILID FLIES OF THE GENUS ABLAUTUS WITH A KEY TO THE SPECIES

1935 ◽  
Vol 67 (10) ◽  
pp. 222-227 ◽  
Author(s):  
J. Wilcox
Keyword(s):  
Sandy Soil ◽  
Arid Regions ◽  
Sandy Desert ◽  
The West ◽  
Additional Material ◽  
Desert Region ◽  
Superficial Resemblance ◽  
Robber Flies

Three of the species of Ablautus Loew described here have been on hand for several years and, as no additional material has become available, there seems to be no reason for delaying their description longer. These small robber flies inhabit the more arid regions of the West and Southwest and seem to prefer sandy localities in the sage brush. Osten Sacken commented on the fact that Ablautus mimus O. S. was associated with Lestomyia sabulonum O. S. on sandy soil and seems to mimic it; and Melander says, regarding Cyrtopogon ablautoides Mel., “The species presents a curious superficial resemblance to Ablautus mimus O. S., with which it is associated in the sandy desert region.”

scholarly journals SALT LAKES OF THE WEST KAZAKHSTAN REGION AS OBJECTS OF MEDICAL TOURISM

2021 ◽  
Vol 36 (2spl) ◽  
pp. 637-645
Author(s):  
Kazhmurat M. AKHMEDENOV ◽  
◽  
Rysty A. KHALELOVA ◽  
Keyword(s):  
Arid Regions ◽  
Medical Tourism ◽  
Dead Sea ◽  
Genetic Type ◽  
Salt Lakes ◽  
The West ◽  
Western Kazakhstan ◽  
The Dead ◽  
West Kazakhstan ◽  
Recreational Use

West Kazakhstan region is also rich in unique balneological hydromineral resources. The aim of the study was to review the studied, as well as little-known and promising, salt lakes of West Kazakhstan region, which have hydromineral resources suitable for balneological and recreational use is given. As a result of the field and laboratory researches in 2017-2020, 7 promising balneological sites were studied – the Lakes Bolshoy Sor, the Alzhansor, the Sorkol, the Hakisor, the Aralsor, the Edilbaysor, the Koysarysor. It was established that the studied peloids correspond to the genetic type of mainland silt mineral (sulphide) therapeutic mud typical of arid regions. According to the main indicators, the studied peloids are generally suitable for use in recreational, therapeutic and medical purposes, and in terms of the content of salts and therapeutically valuable components, they are not inferior to the medical mud of the resorts of Western Kazakhstan and the Dead Sea recognized in balneological practice.

scholarly journals Ground-Water Quality in Islamkot and Mithi Talukas of District Tharparkar, Sindh, Pakistan

2019 ◽  
Vol 38 (1) ◽  
pp. 143-150
Author(s):  
Jhaman Das Suthar ◽  
Inayatullah Rajper ◽  
Zia-ul- Hassan ◽  
Nizamuddin Depar ◽  
Velo Suthar
Keyword(s):  
Water Quality ◽  
Water Samples ◽  
Crop Production ◽  
Arid Regions ◽  
Salt Content ◽  
Water Bodies ◽  
Ground Water Quality ◽  
Desert Region ◽  
Remote Areas

Surface water supplies are gradually becoming short in arid and semi-arid regions of the world. Thus, assessment of groundwater quality for crop use appears to be very essential for management and utilization of precious natural water resources. This study reports the water quality of 52 hand pumps and one tubewell located in the most remote areas of desert region, viz. Islamkot and Mithi talukas of district Tharparkar. The water samples were collected during April 2016 (just before the start of rainy season). The water samples were analyzed for EC (Electrical Conductivity), pH, CO32-, HCO3-, Cl-, Ca2+, Mg2+ and Na+ concentration. The SAR (Sodium Adsorption Ratio) and RSC (Residual Sodium Carbonates) were estimated using their respective formula. The categorization of water samples based on their soluble salt content clearly revealed that the water bodies of majority (65%) of areas were hazardous, while 25% areas were marginal. Thus, only 11% water samples of the area under study had useable irrigation water. Because of SAR and RSC the majority (89 and 77%, respectively) of water samples were found to be free from the sodicity hazard. The study concluded that salinity, and not sodicity was the major threat to the area under irrigation with these water bodies. It is, therefore, suggested that the salinity tolerant crops and their genotypes may be used in this area to sustain crop production.

AN ANALYSIS OF THE WEAR OF PLOUGHSHARES WITH VARIOUS TECHNOLOGICAL SOLUTIONS

Tribologia ◽  
2016 ◽  
Vol 267 (3) ◽  
pp. 139-151 ◽  
Author(s):  
Jerzy NAPIÓRKOWSKI ◽  
Magdalena LEMECHA
Keyword(s):  
Sandy Soil ◽  
The Other ◽  
Soil Conditions ◽  
Additional Material ◽  
Chromium Carbides ◽  
Wear Process ◽  
Other Hand ◽  
Natural Operation ◽  
Martensitic Microstructure

The paper analyses wear processes in various technological forms of ploughshares. Tests involved ploughshares made of Hardox 500, B 27 and 38GSA steel, as well as Hardox 500 steel with the cutting edges hardfaced by means of an El – Hard 63 electrode on the front and back sides, as well as 38GSA steel hardfaced by means of an EStelMn60 electrode. The tests were conducted during natural operation when processing sandy soil. During the tests, the changes in the mass and geometry of ploughshares were measured as a function of the processed area. Ploughshares made of steel were characterised by a diverse martensitic microstructure. The hardfaced layers, on the other hand, were dominated by chromium carbides with alloy ferrite. It has been concluded that the use of hardfaced layers considerably impact the decrease in the intensity of wear of the tested working elements. On the other hand, no significant differences were observed in the wear processes of hardfaced ploughshares depending on the native and additional material and the place of the application of the hardfacing agent. In the analysed soil conditions, ploughshares made of steel did not exhibit any significant differences in the wear process.

Revalidation of Chlamydopleon aculeatum Ortmann, 1893, and its consequences for the taxonomy of Gastrosaccinae (Crustacea: Mysida: Mysidae) endemic to coastal waters of America

Zootaxa ◽  
2009 ◽  
Vol 2115 (1) ◽  
pp. 21-33 ◽  
Author(s):  
KARL J. WITTMANN
Keyword(s):  
Coastal Waters ◽  
Junior Synonym ◽  
Type Material ◽  
New Combinations ◽  
American Continent ◽  
The West ◽  
Additional Material ◽  
Genus Level ◽  
East Pacific ◽  
Morphological Differences

A recent revision of burrowing mysid taxa in coastal waters on both sides of the American continent, published in this journal by Heard and Price (2006), necessitates a redescription of Chlamydopleon aculeatum Ortmann, 1893 based on type material from the Tocantins estuary on the coast of Brazil. A lectotype is designated and this taxon is revalidated at the species and genus level. The genus Chlamydopleon Ortmann, 1893 gains precedence over the junior synonym Bowmaniella Heard & Price, 2006. The West Atlantic species Gastrosaccus dissimilis Coifmann, 1937 is redescribed based on the types from the coast of Brazil. Regional morphological differences are evident in additional material from 24°S to 34°N. This species and the East Pacific Bowmaniella (Coifmanniella) banneri Bǎcescu, 1968 are transferred to the genus Chlamydopleon, using the new combinations C. dissimile and C. banneri. A key to the acknowledged two genera and seven species of Gastrosaccinae with apically widened third male pleopod is given.

Metamorphic Rocks of the Sea Floor between Start Point and Dodman Point, S.W. England

1964 ◽  
Vol 44 (3) ◽  
pp. 655-663 ◽  
Author(s):  
F. C. Phillips
Keyword(s):  
Near East ◽  
Metamorphic Rocks ◽  
Mica Schist ◽  
Marine Biological Laboratory ◽  
The West ◽  
Additional Material ◽  
Maximum Width ◽  
Sea Floor ◽  
East West

As part of the programme of study of the geology of the western approaches initiated at Bristol by Prof. W. F. Whittard (Whittard, 1962) information has been accumulated concerning the distribution and nature of the metamorphic rocks exposed in a series of inliers between Start Point in the east and Dodman Point in the west.Early dredgings in this area were described by Worth (1908). Six core samples and two dredgings of metamorphic rocks are listed by Hill & King (1953). Mica schist in situ is recorded by Holme (1953). Various cruises in R.V. ‘Sarsia’ from 1957 onwards have yielded seventeen cores and further dredged samples. Additional material, collected from the exposed parts of the Eddystone reefs or obtained by diving at critical localities, has become available through the kindness of members of the staff of the Marine Biological Laboratory at Plymouth.Sixteen cores and eight dredged samples serve to demarcate an area of schistose rocks, extending some 24 miles from east to west and 7 miles in maximum width from north to south, off the southernmost part of Devon (Fig. 1). These rocks, with an exception to be noted, compare closely with those exposed on land, between Bolt Tail and Start Point, south of a well defined east-west boundary (Ussher, 1904; Tilley, 1923). There are examples of quartz-muscovite-chlorite schists precisely like the Start Mica-schists and Bolt Mica-schists described by Tilley. Albite porphyroblasts, in a rock dredged near East Rutts (Fig. I, 1262) which is transitional to Tilley's ‘schists of composite origin’, show well the contorted swarms of carbonaceous inclusions which he describes (1923, p. 180).

scholarly journals New measures of deep soil water recharge during vegetation restoration process in semi-arid regions of northern China

2020 ◽  
Author(s):  
Yiben Cheng ◽  
Hongbin Zhan ◽  
Wenbin Yang ◽  
Qunou Jiang ◽  
Yunqi Wang ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Sandy Soil ◽  
Arid Regions ◽  
Soil Layer ◽  
Soil Particle ◽  
Sandy Land ◽  
Deep Soil ◽  
Artemisia Sphaerocephala ◽  
The Impact ◽  
Semi Arid

Abstract. Desertification in semi-arid regions is currently a global environmental and societal problem. This research attempts to understand whether a 40-year-old rain-feed Artamisia sphaerocephala Krasch sand-fixing land in Three North Shelterbelt Program (3NSP) of China can be developed sustainably or not, using a newly designed lysimeter to monitor the precipitation-induced deep soil recharge (DSR) at 220 cm depth. Evapotranspiration is calculated through a water balance equation when precipitation and soil moisture data are collected. Comparison of soil particle sizes and soil moisture distributions in artificial sand-fixing land and neighboring bare land is made to assess the impact of sand-fixing reforestation. Results show that such a sand-fixing reforestation results in a root system being mainly developed in the horizontal direction and the changed soil particle distribution. Specifically, the sandy soil with 50.53 % medium sand has been transformed into a sandy soil with 68.53 % fine sand. Within the Artamisia sphaerocephala Krasch sand-fixing experimental area, the DSR values in bare sand plot and Artemisia sphaerocephala Krasch plot are respectively 283.6 mm and 90.6 mm in wet years, reflecting a difference of more than three times. The deep soil layer moisture in semi-arid sandy land is largely replenished by precipitation-induced infiltration. The DSR values of bare sandy land plot and Artemisia sphaerocephala Krasch plot are respectively 51.6 mm and 2 mm in dry years, a difference of more than 25 times. The proportions of DSR reduced by Artemisia sphaerocephala Krasch is 68.06 % and 96.12 % in wet and dry years, respectively. This research shows that Artamisia sphaerocephala Krasch in semi-arid region can continue to grow and has the capacity of fixing sand. It consumes a large amount of precipitated water, and reduces the amount of DSR considerably.

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