scholarly journals Studying Settlement Gorodishche 1 in the Zonalnyi District

2020 ◽  
pp. 107-113
Author(s):  
A.A. Kazakov ◽  
O.M. Kazakova
Keyword(s):  
Open Hearth ◽  
Common Elements ◽  
Cultural Layer ◽  
Land Plot ◽  
Southern Shore ◽  
Rectangular Form ◽  
Economic Zone ◽  
A Site ◽  
First Time

The article is devoted to the publication of obtained materials from a site in the Itkul archaeological district that includes a settlement called Gorodishche 1. The site is located on the southern shore of Lake Bol'shoi Itkul, on the border of the Zonalnyi and Troitskii districts. The land plot of the settlement has a complex layout and is limited by a moat. At the site, an area of 64 square metres was excavated, as a result, a dwelling pit and a small part of the moat were investigated. The dwelling was a semi-hut of a semi-rectangular form with an open hearth. The area of the dwelling was about 28 square metres. The location of the materials in the dwelling pit shows the special features of the layout. The place of entrance was identified. The economic zone was distinguished by the location of the hearth and the accumulation of ceramics around it; it was located at the farthest wall from the entrance. There were not many finds in the cultural layer. The finds were represented by clusters of ceramics. The vessels were round-bottomed, of lowered proportions, decorated with ornament in the upper part. The most common elements of the ornament were pits. There was also a comb duck ornament. Just one element was used in the ornamental composition. The features of the ceramic complex allowed the authors to refer the studied site to the Fominskaya stage of the Kulaiskaya culture and date it within the 2nd-4th centuries. The material is published for the first time.

Pleistocene Mammals from Gold Run Creek, Yukon Territory

1973 ◽  
Vol 10 (5) ◽  
pp. 697-759 ◽  
Author(s):  
C. R. Harington ◽  
F. V. Clulow
Keyword(s):  
Yukon Territory ◽  
Radiocarbon Date ◽  
Common Elements ◽  
Radiocarbon Dates ◽  
Equus Asinus ◽  
Wild Ass ◽  
Pleistocene Mammals ◽  
First Time

Remains of thirteen species of mammals are reported from Pleistocene deposits at Gold Run Creek near Dawson, Yukon Territory. Eight of the thirteen species are extinct and two are no longer living in the Yukon. The most common elements of the fauna are Equus (Asinus) lambei (Yukon wild ass), and Bison crassicornis (large-horned bison). Taxidea (badger) and Bison alaskensis (Alaskan bison) are reported for the first time from the Yukon Pleistocene. A kiang-like horse is also reported from deposits at Gold Run Creek.These mammals may have inhabited a cool grassland or open parkland during late Wisconsin time. Bison crassicornis and mammoth bone from deposits at Gold Run Creek have yielded radiocarbon dates of 22 200 ± 1400 yr B.P. and 32 250 ± 1750 yr B.P. respectively. Bison alaskensis is evidently older than the remainder of the fauna as bone from the specimen yielded a radiocarbon date of over 39 900 yr B.P.

scholarly journals The T788G Mutation in thecyp51CGene Confers Voriconazole Resistance in Aspergillus flavus Causing Aspergillosis

2012 ◽  
Vol 56 (5) ◽  
pp. 2598-2603 ◽  
Author(s):  
Wei Liu ◽  
Yi Sun ◽  
Wei Chen ◽  
Weixia Liu ◽  
Zhe Wan ◽  
...  
Keyword(s):  
Aspergillus Flavus ◽  
Resistant Strain ◽  
Antifungal Susceptibility ◽  
Gene Replacement ◽  
Content Type ◽  
Replacement Method ◽  
First Choice ◽  
The One ◽  
A Site ◽  
First Time

ABSTRACTWith voriconazole (VRC) being approved as the first choice in treating invasive aspergillosis (IA) and its increasing use in treatment, a VRC-resistant strain ofAspergillus flavus, the second leading cause of IA afterAspergillus fumigatus, has emerged. The VRC-resistant strain ofA. flavuswas isolated for the first time from the surgical lung specimen of an IA patient with no response to VRC therapy. In order to ascertain the mechanism of VRC resistance, the azole target enzyme genes in this strain ofA. flavuswere cloned and sequenced, and 4 mutations generating amino acid residue substitutions were found in thecyp51Cgene. To further determine the role of this mutated gene for VRC resistance inA. flavus, anAgrobacterium tumefaciens-mediated gene replacement approach was applied. Consequently, the mutatedcyp51Cgene from thisA. flavusstrain was proven to confer the VRC resistance. Finally, to discern the one out of the four mutations in thecyp51Cgene that is responsible for contributing to VRC resistance, a site-directed gene mutagenesis procedure combined with a gene replacement method was performed. As a result, the T788G missense mutation in thecyp51Cgene was identified as responsible for VRC resistance inA. flavus. These findings indicated that the detection of this mutation inA. flavuscould serve as an indicator for physicians to avoid the use of VRC during IA treatment. Further comprehensive surveillance for antifungal susceptibility, as well as intensive study on the mechanism of azole resistance inA. flavuscausing IA, would be required to fully understand this mechanism.

scholarly journals Seed Mediated Synthesis of Colloidal Halide Perovskite Nanoplatelets

2021 ◽  
Author(s):  
C. Meric Guvenc ◽  
sinan balci
Keyword(s):  
Optical Properties ◽  
Halide Salt ◽  
Seed Solution ◽  
Synthesis Route ◽  
Line Widths ◽  
Halide Perovskite ◽  
Seed Mediated ◽  
A Site ◽  
First Time ◽  
Lead Halide

<p><b>Two-dimensional lead halide perovskite nanoplatelets (2D LHP NPLs) have been emerging as one of the most promising semiconductor nanomaterials due to their narrow absorption and emission line widths, tunable bandgaps, high exciton binding energies, high defect tolerance as well as highly localized energy states. Colloidal synthesis of 2D LHP NPLs is generally performed using hot-injection or ligand assisted precipitation techniques (LARP). In the LARP method, perovskites are synthesized in polar solvents, which decrease the stability of the 2D LHP NPLs due to their weakly bonded nature. In fact, the presence of residual polar solvent in the LHP NPL colloid can cause deterioration of thickness uniformity, degradation of NPLs to parent precursors, and undesired phase transformations. Herein, for the first time, we report facile seed-mediated synthesis route of monolayer, 2-monolayers, and thicker lead halide perovskite nanoplatelets without using A site cation halide salt (AX</b><b>;</b><b> A = Cesium, methylammonium, formamidinium and, X = Cl, Br, I) and long chain alkylammonium halide salts (LX; L = oleylammonium, octylammonium, butylammonium and, X = Cl, Br, I). The seed solution has been synthesized by reacting lead (II) halide salt and coordinating ligands (oleylamine or octylamine and oleic acid) in nonpolar high boiling solvent (1-octadecene). The seed mediated synthesis has been carried out in hexane by reacting seed solution with A-site cation precursors (Cs-oleate, FA-oleate, or diluted MA solution in hexane) under ambient conditions. More importantly, the seed mediated growth of NPLs has been tracked for the first time by performing in-situ optical measurements. Furthermore, the optical properties and morphologies of the seeds have been extensively studied. We find that our facile synthesis route provides highly stable, monodisperse NPLs with narrow absorption, and photoluminescence line widths (68-201 meV), and high PLQY (37.6-1.66% for 2ML NPLs). Furthermore, anion exchange reactions have been performed by mixing pre-synthesized LHP NPLs with counter halide seeds. The optical properties of NPLs have been affectively tuned by postsynthetic chemical reactions without changing the thickness of the NPLs. We anticipate that our new synthetic route provides further understanding of growth dynamics of LHP NPLs.</b></p>

The Palace of the Republic versus the Stadtschloss: The Dilemmas of Planning in the Heart of Berlin

2003 ◽  
Vol 21 (4) ◽  
pp. 30-73 ◽  
Author(s):  
Susanne Ledanff
Keyword(s):  
Architectural Design ◽  
Capital City ◽  
Holocaust Memorial ◽  
The Republic ◽  
German Bundestag ◽  
Historical Sites ◽  
Architectural Competitions ◽  
A Site ◽  
Art And Architecture ◽  
First Time

On 4 July 2002, the German Bundestag had to decide on the futureof one of the capital city’s principal historical sites: the square knownas the Schlossplatz, where the Hohenzollern Palace once stood butthat since 1976 had been the site of the German Democratic Republic’sflagship Palace of the Republic. It was not the first time thatGerman politicians had been called upon to decide issues relating toart and architecture. On previous occasions votes had been taken onthe wrapping of the Reichstag by Christo and Jeanne-Claude, SirNorman Foster’s dome, Hans Haacke’s artistic installation “DerBevölkerung” inside the Reichstag, and Peter Eisenman’s design forBerlin’s Holocaust memorial.1 Their decision to rebuild the historicalpalace, however, differed in that the politicians did not vote onan architectural design, “in eigener Sache.”2 That is, it was not abuilding or monument belonging to the governmental or politicalsphere of the capital city but rather a site likely to house culturalinstitutions. Parliamentarians, thus, were called upon to settle atwelve-year-old planning and architectural controversy after all othermeans, including architectural competitions, had failed.

Biological Sampling and Analysis Procedures for the United Nations Special Commission (UNSCOM) in Iraq

1995 ◽  
Vol 14 (2) ◽  
pp. 240-243 ◽  
Author(s):  
Alan J. Mohr
Keyword(s):  
United Nations ◽  
Environmental Samples ◽  
Biological Research ◽  
Special Commission ◽  
Biological Sampling ◽  
The United Nations ◽  
June July ◽  
A Site ◽  
First Time ◽  
Production Facilities

In June/July 1994, I was fortunate in having been selected by the United Nations Special Commission (UNSCOM) to be the chief inspector (CI) of one of the most interesting inspections conducted by the commission, namely UNSCOM 84/BW6. This particular inspection was fascinating because of its complexity—the team not only conducted inspections of Iraqi biological research and production facilities, it also excavated a site that UNSCOM surmised might contain materials from Iraq's former BW program. As such, this inspection was the first time that UNSCOM collected environmental samples for analysis. In this paper I discuss my experiences during this inspection and comment on the effectiveness of sampling and analysis as a verification measure.

scholarly journals A relict population of Cymbalophora rivularis on the Pollino Massif, southern Italy (Lepidoptera: Erebidae)

2018 ◽  
pp. 37-41
Author(s):  
Silvia Greco ◽  
Francesco Luigi Leonetti ◽  
Stefano Scalercio
Keyword(s):  
Plant Species ◽  
National Park ◽  
Southern Italy ◽  
First Record ◽  
South Italy ◽  
Refuge Area ◽  
Relict Populations ◽  
Relict Population ◽  
A Site ◽  
First Time

The first record for South Italy of Cymbalophora rivularis (Ménétriès, 1832) is reported, until now recorded in Italy only for Central Apennine. Three specimens were collected during August-September 2017, in an Acer spp. forest located on Monte Sparviere, a Site of Community Importance within the Pollino National Park. Furthermore, this species was successfully barcoded for the first time. This finding reinforces the biogeographic importance of Pollino Massif as refuge area for relict populations of several animal and plant species.

Studies on metal hydroxy compounds. II. Infrared spectra of zinc derivatives ϵ-Zn(OH)2, β-ZnOHCl, ZnOHF, Zn5(OH)8Cl2, and Zn5(OH)8Cl2·H2O

1967 ◽  
Vol 45 (6) ◽  
pp. 585-588 ◽  
Author(s):  
O. K. Srivastava ◽  
E. A. Secco
Keyword(s):  
Infrared Spectra ◽  
Group Factor ◽  
Absorption Bands ◽  
Site Group ◽  
Planar Molecule ◽  
Stretching Vibration ◽  
Hydroxy Compounds ◽  
A Site ◽  
First Time ◽  
Unambiguous Assignment

Infrared spectra of ϵ-Zn(OH)2, β-ZnOHCl, ZnOHF, Zn5(OH)8Cl2, and Zn5(OH)8Cl2·H2O and their deuterated analogues in the range 2.5–16 μ are reported for the first time. The effects of substituting a halogen for an OH group in Zn(OH)2 are (i) sharper OH stretching absorption bands, (ii) splitting of bands involving OH to give distinct doublets in ZnOHF and Zn5(OH)8Cl2, indicating strong intermolecular coupling, and (iii) shift of the OH stretching vibration to a higher frequency. Strong absorption bands are observed in the region of 695–780 cm−1 for all compounds and also near 1 020 ± 30 cm−1 in all cases except ZnOHCl. All the observed bands are displaced to lower frequencies by the deuterated analogues, with vH/vD ratios in the range 1.30–1.36. A cursory interpretation of the spectra of ZnOHCl and ZnOHF is given in terms of a planar molecule of Cs symmetry, but the unambiguous assignment of the bands must await a site group or group factor analysis.

New and little-known cheilostomatous Bryozoa from the south and southeastern Brazilian continental shelf and slope

Zootaxa ◽  
2019 ◽  
Vol 2722 (1) ◽  
pp. 1 ◽  
Author(s):  
LEANDRO M. VIEIRA ◽  
DENNIS P. GORDON ◽  
FACELUCIA B.C. SOUZA ◽  
MARIA ANGÉLICA HADDAD
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
New Genus ◽  
Exclusive Economic Zone ◽  
New Combination ◽  
Brazilian Coast ◽  
New Genus And Species ◽  
The South ◽  
Economic Zone ◽  
First Time

The present paper reports on 22 species collected by the Brazilian Program of Living Resources in the Exclusive Economic Zone (REVIZEE). A new genus and species of Cribrilinidae, Corbuliporina crepida n. gen. et sp., is described, along with seventeen other new species: Chaperia brasiliensis n. sp., Amastigia aviculifera n. sp., Isosecuriflustra pinniformis n. sp., Cellaria subtropicalis n. sp., Melicerita brasiliensis n. sp., Arachnopusia haywardi n. sp., Smittina migottoi n. sp., Hippomenella amaralae n. sp., Rogicka joannae n. sp., Malakosaria atlantica n. sp., Turbicellepora winstonae n. sp., Rhynchozoon coalitum n. sp., Stephanollona angusta n. sp., Stephanollona arborescens n. sp., Aulopocella americana n. sp., Conescharellina cookae n. sp. and Conescharellina bocki n. sp. Chorizopora brongniartii (Audouin, 1826) is recorded for the first time in Brazilian waters and a new combination for Rhynchozoon arborescens Canu & Bassler, 1928 is established. New illustrations and taxonomic remarks are included for two little-known species from Brazil, Rogicka scopae (Canu & Bassler, 1928) and Fenestrulina ampla Canu & Bassler, 1928. A compilation of species recorded from deeper waters of the Brazilian coast is included.

A field trial of the synthetic oviposition pheromone with Culex quinquefasciatus say (Diptera: Culicidae) in Kenya

1988 ◽  
Vol 78 (3) ◽  
pp. 463-470 ◽  
Author(s):  
W. A. Otieno ◽  
T. O. Onyango ◽  
M. M. Pile ◽  
B. R. Laurence ◽  
G. W. Dawson ◽  
...  
Keyword(s):  
Growth Regulator ◽  
Culex Quinquefasciatus ◽  
Pupal Stage ◽  
Insect Growth Regulator ◽  
Breeding Sites ◽  
Insect Growth ◽  
Gravid Females ◽  
A Site ◽  
Effervescent Tablet ◽  
First Time

AbstractThe synthetic attractant pheromone 6-acetoxy-5-hexadecanolide in a formulation of 20 mg containing 5 mg of the active (−)-(5R,6S)-isomer in an effervescent tablet produced a high, positive overall response by gravid females of Culex quinquefasciatus Say when the mosquitoes were exposed to the pheromone in established breeding sites in western Kenya. Significantly more females (82%) oviposited around the pheromone source compared to a control. The activity of the pheromone persisted in the established breeding place for four days after application. The addition of the insect growth regulator S-31183 (2-[1-methyl-2-(4-phenoxyphenoxy)ethoxy]pyridine) to the formulation did not affect the activity of the pheromone. Newly-made breeding sites exposed domestically were not attractive initially for oviposition by gravid females but, after 18 days, they became more attractive. Trays treated with synthetic pheromone diverted females from similar unbaited trays exposed within 10 m. A sample of larvae taken from a site treated with pheromone and insect growth regulator showed 100% mortality by the pupal stage. Thus, the efficacy of the pheromone has been demonstrated for the first time in the field and the possibility of using this material in combination with a ‘safe’ insecticide confirmed.

scholarly journals Hoverfly (Diptera: Syrphidae) assemblage of an oak–hornbeam in the Merlino Wood Natural Reserve and implications for its conservation

2020 ◽  
Vol 8 ◽  
Author(s):  
Umberto Maritano
Keyword(s):  
Northern Italy ◽  
Habitat Conservation ◽  
Po Plain ◽  
Good Preservation ◽  
Community Interest ◽  
Natural Reserve ◽  
Lowland Forests ◽  
A Site ◽  
First Time ◽  
Malaise Traps

Merlino Wood is a typical oak–hornbeam forest in the Po Plain hydrographic region. It is one of the few remaining lowland forests in Northern Italy and is a Regional Natural Reserve and a Site of Community Interest (code IT1160010). This is the first survey on hoverflies in the study area and they act as bioindicators to assess habitat conservation. Sampling was performed with three Malaise traps and an entomological net. A total of 61 species of Syrphidae were recorded between March and October 2019. Three of the species observed are considered to be under threat in Europe, three species have been recorded for the first time in Piedmont and Heringia latitarsis (Egger, 1865) has been recorded for the first time in Northern Italy. The Syrph the Net analysis has been used to assess habitat conservation. It shows good preservation of xylosaprophagous species, while the conservation conditions of other larval trophic categories are poor.

Sign in / Sign up

Export Citation Format

Share Document