Search results for "Preparation"
showing 9 items of 939 documents
Defying Stereotypes with Nanodiamonds: Stable Primary Diamondoid Phosphines
2016
International audience; Direct unequal C-H bond difunctionalization of phosphorylated diamantane was achieved in high yield from the corresponding phosphonates. Reduction of the functionalized phosphonates provides access to novel primary and secondary alkyl/aryl diamantane phosphines. The prepared primary diamantyl phosphines are quite air stable compared to their adamantyl and especially alkyl or aryl analogues. This finding is corroborated by comparing the singly occupied molecular orbital energy levels of the corresponding phosphine radical cations obtained by density functional theory computations.
Developments in the biomechanics and equipment of Olympic cross-country skiers
2018
Source at: http://doi.org/10.3389/fphys.2018.00976 Here, our aim was to describe the major changes in cross-country (XC) skiing in recent decades, as well as potential future developments. XC skiing has been an Olympic event since the very first Winter Games in Chamonix, France, in 1924. Over the past decades, considerable developments in skiing techniques and improvements in equipment and track preparation have increased skiing speed. In contrast to the numerous investigations on the physiological determinants of successful performance, key biomechanical factors have been less explored. Today’s XC skier must master a wide range of speeds, terrains, and race distances and formats (e.g., dis…
Vecāku un skolotāju sadarbība bērnu ar mācīšanās grūtībām gatavošanas skolai procesā
2021
Maģistra darba temats: Vecāku un skolotāju sadarbība bērnu ar mācīšanās grūtībām gatavošanas skolai procesā Maģistra darba autore: Inna Gavriļonoka Maģistra darba zinātniska vadītāja: Dr.paed., asoc. prof. Ieva Margeviča- Grinberga Pētījums izstrādāts ar mērķi teorētiski un empīriski pētīt vecāku un skolotāju sadarbības īpatnības bērnu ar mācīšanās grūtībām gatavošanas skolai procesā un noteikt ieteicamo sadarbības pasākumus un metodes bērnu ar mācīšanās grūtībām gatavošanā skolai. Darbā teorētiski raksturotas bērnu ar mācīšanās grūtībām sagatavošanās skolai īpatnības un noteikts vēlamā atbalsta raksturs. Liela uzmanība pievērsta skolotāju un vecāku sadarbības veidošanas iespējām, lai sekmē…
Determination of glyphosate and its metabolite aminomethylphosphonic acid in fruit juices using supported-liquid membrane preconcentration method wit…
2005
Abstract The application of supported-liquid membrane (SLM) technique for effective extraction of N -(phosphonomethyl)glycine (glyphosate) and its primary metabolite aminomethylphosphonic acid (AMPA) from juices (orange, grapefruit, apple and blackcurrant) in combination with HPLC-UV detection after derivatization with p -toluenesulphonyl chloride (TsCl) is presented. The influence of various parameters such as the composition of acceptor phase, flow-rate, concentration of analytes, on the performance of extraction procedure, was studied. It was shown that by appropriate manipulation of SLM parameters the level of detection could be significantly improved. The influence of SLM conditions on…
Repensant la formació inicial del professorat per a la diversitat lingüística i cultural a l'aula
2011
Durant les últimes dècades els sistemes educatius europeus estan fent front a nombrosos reptes relacionats amb el tractament de la diversitat cultural i lingüística de l’alumnat. Per tal de poder afrontar aquesta diversitat es fa necessari impulsar plantejaments globals que s’adrecin al conjunt de la població amb la finalitat de construir una societat cohesionada. A l’article exposem algunes de les principals dificultats relatives a la formació inicial del professorat en quan a la gestió i al tractament de la diversitat lingüística i cultural, així com diferents projectes i enfocaments que pretenen establir noves directrius per a la seva formació competencial.
Who Becomes U.S. Mathematics Teachers: A Longitudinal Analysis of First-time Praxis® II Mathematics Content Knowledge Examinees
2018
International audience; The U.S. uses the Praxis® tests to measure academic skills and the subject-specific content knowledge needed to be a teacher. This study examined Praxis® Mathematics Content Knowledge scores from 2006 to 2016 to describe patterns in who are becoming certified to teach mathematics in the country. Longitudinal analyses were used to discern patterns in the demographics of examinees and trends in exam performance across several demographic characteristics. The results reveal substantial differences in performance and pass rates between examinees of different genders, races, undergraduate majors, undergraduate GPAs, and census regions. From our analyses, we suggest severa…
Pedagogìčna vzaêmodìâ âk važlivij činnik udoskonalennâ fahovoï pìdgotovki majbutnìh učitelìv
2017
In the article the problem of empathy is examined as the social-psychological phenomenon, the historical aspects of establishment of this concept are selected. It is here underlined going near understanding of this concept and role of empathy for the future teachers.
Infection-induced chromatin modifications facilitate translocation of herpes simplex virus capsids to the inner nuclear membrane
2021
Herpes simplex virus capsids are assembled and packaged in the nucleus and move by diffusion through the nucleoplasm to the nuclear envelope for egress. Analyzing their motion provides conclusions not only on capsid transport but also on the properties of the nuclear environment during infection. We utilized live-cell imaging and single-particle tracking to characterize capsid motion relative to the host chromatin. The data indicate that as the chromatin was marginalized toward the nuclear envelope it presented a restrictive barrier to the capsids. However, later in infection this barrier became more permissive and the probability of capsids to enter the chromatin increased. Thus, although …
Preparing an emotionally expressive vocal performance
2018
This paper explores the processes, strategies, and methods used when preparing an expressive vocal performance from the point-of-view of the artist. The study tracked the development and performance preparation of 13 university students studying classical voice performance or music education. Participants were asked to choose one unfamiliar piece from their repertoire and complete three surveys administered at the beginning, middle, and end of their study term. Each survey was geared toward the participants’ level of preparation and pertained to their approaches for learning new repertoire, the application of constructive criticism from peers and instructors, and experiences during and afte…