Search results for "argon"
showing 10 items of 250 documents
Chlorophyll content in senescent Pelargonium graveolens leaves
2019
Pelargonium graveolens należy do rodziny Geraniaceae. Roślina ta jest aromatycznym, owłosionym krzewem, sięgającym 1,2 metra wysokości i osiągającym 1 m szerokości. Jej liście są mocno powcinane, miękkie w dotyku i wydzielają intensywny zapach, natomiast kwiaty są małe, zwykle różowe, zebrane w baldachy. Ojczyzną P. graveolens jest Afryka Południowa, ale uprawia się ją obecnie w wielu krajach świata, np. wyspie Reunion, Egipcie, Rosji, Chinach czy Maroko, głównie z przeznaczeniem na produkcję olejku eterycznego. Wykorzystywany jest on w wielu gałęziach przemysłu, m.in. perfumiarstwie, kosmetyce, przemyśle spożywczym czy medycynie. Dane literaturowe pokazują, że o kondycji całej rośliny świa…
Volume I. Introduction to DUNE
2020
Journal of Instrumentation 15(08), T08008 (1-228) (2020). doi:10.1088/1748-0221/15/08/T08008
Ekonomikas nozares diskursā lietojamā profesionālā valoda
2016
Šajā darbā ir adresēts jautājums par ekonomikas nozares diskursā lietojamo profesionālo valodu. Pētījuma mērķis bija iepazīt profesionālā žargona esošās tendences Swedbank gada pārskatā, analizējot to no valodniecības un pragmatikas zinātnes viedokļa. Lai veiktu analīzi, kvalitatīvā metode un izvēlēti elementi no kvantitatīvās metodes tika izmantoti. Iegūtie dati norāda, ka profesionālais žargons ir atrodams Swedbank gada pārskatā. No valodniecības zinātnes analīzes viedokļa, visbiežāk pielietotās nozīmes veids ir konteksta nozīme, un visplašāk pielietotā leksiskā vienība ir vārdkopa. Kas attiecas uz analīzi no pragmatikas zinātnes viedokļa, komunikatīvais notikums ir raksturots kā gada kop…
Complexes of Glycolic Acid with Nitrogen Isolated in Argon Matrices. I. Structures and Thermal Effects.
2019
Molecular complexes between glycolic acid and nitrogen were studied in a low-temperature argon matrix with FTIR spectroscopy, and supported by MP2 and BLYPD3 calculations. The calculations indicate 11 and 10 stable complex structures at the MP2 and BLYPD3 levels of theories, respectively. However, only one hydrogen-bonded complex structure involving the most stable SSC conformer of glycolic acid was found experimentally, where the nitrogen molecule is bound with the carboxylic OH group of the SSC conformer. The complex shows a rich site structure variation upon deposition of the matrix in different temperatures and upon annealing experiments, which provide interesting prospects for site-sel…
Experimental FTIR-MI and Theoretical Studies of Isocyanic Acid Aggregates
2023
Homoaggregates of isocyanic acid (HNCO) were studied using FTIR spectroscopy combined with a low-temperature matrix isolation technique and quantum chemical calculations. Computationally, the structures of the HNCO dimers and trimers were optimized at the MP2, B3LYPD3 and B2PLYPD3 levels of theory employing the 6-311++G(3df,3pd) basis set. Topological analysis of the electron density (AIM) was used to identify the type of non-covalent interactions in the studied aggregates. Five stable minima were located on the potential energy surface for (HNCO)2, and nine were located on the potential energy surface for (HNCO)3. The most stable dimer (D1) involves a weak, almost linear N-H⋯N hydrog…
Light-induced, site-selective isomerization of glyoxylic acid in solid xenon
2014
Abstract The isomerization of glyoxylic acid (GA) and its water complex was studied in a low temperature xenon matrix. The aim of these studies was to understand how xenon environment affects the cis-trans GA interconversion upon near infrared irradiation. In solid xenon, the GA conformers are embedded in two different matrix sites. These show up as different vibrational bands of GA that exhibit different kinetic rates of isomerization. Upon complexation with water, the isomerization process slows down. Xenon matrix appears not to affect energy relaxation process via intramolecular or intermolecular hydrogen bond as compared with previous experiments in an argon.
Monitoring and data quality assessment of the ATLAS liquid argon calorimeter
2014
The liquid argon calorimeter is a key component of the ATLAS detector installed at the CERN Large Hadron Collider. The primary purpose of this calorimeter is the measurement of electron and photon kinematic properties. It also provides a crucial input for measuring jets and missing transverse momentum. An advanced data monitoring procedure was designed to quickly identify issues that would affect detector performance and ensure that only the best quality data are used for physics analysis. This article presents the validation procedure developed during the 2011 and 2012 LHC data-taking periods, in which more than 98% of the proton-proton luminosity recorded by ATLAS at a centre-of-mass ener…
Dräparpannor och kyliga kustoms : hot rod-jargong i Wheels Magazine
2000
FTIR matrix isolation and theoretical studies of glycolic acid dimers
2018
Glycolic acid (GA) dimers were studied in low temperature argon matrices by means of FTIR spectroscopy. Experimentally, the dimers were produced when monomeric glycolic acid molecules were thermally mobilized upon annealing of argon matrices at 25–35 K. The experimental spectra observed upon annealing indicate the presence of three different dimer structures. Computationally, MP2 and DFT calculations were used to study the potential dimer species in order to scrutinize the possible dimer structures, their energetics and their spectral features. Altogether 27 local minima were found for dimer structures for the three lowest conformers of glycolic acid considered based on previous studies on …
Modes vārdu lietojums lietišķās angļu valodas tekstu korpusā
2015
Modes vārdi jau labu laiku ir bijis iecienīts temats tiem, kas tos lieto ikdienā. Visbiežāk tie ir biznesa speciālisti, izglītībā strādājošie, politiķi vai IT speciālisti. Lai arī eksistē pietiekami daudz biznesa literatūras stilā sarakstītu žurnālu rakstu, grāmatu un vārdnīcu, kas veltīti modes vārdiem, ļoti maz ir tādu zinātnisku darbu, kas apraksta modes vārdus no lingvistikas viedokļa. Tādēļ šī zinātniskā darba mērķis ir izpētīt, izanalizēt un aprakstīt modes vārdu lietojumu, it sevišķi to lietojumu lietišķajā angļu valodā. Lai sasniegtu uzstādīto mērķi, tika izpētīts, izanalizēts un salīdzināts četru modes vārdu game-changing, innovative, thought leader un visionary lietojums vispārīga…