Search results for " Stab"
showing 10 items of 1773 documents
Perifērā kāju muskuļa noguruma ietekme uz stājas stabilitāti
2016
Noguruma efekti galvenokārt pētīti, izmantojot tādus intensīvu dinamisku slodžu veidus, kā riteņbraukšana un skriešana, bet mazāk izometriskas slodzes. Pie tam noguruma ietekme uz stājas stabilitāti ir ļoti maz pētīta. Līdz ar to noguruma izcelsmei un cēloņiem arvien vairāk pievērš uzmanību fizioterapeiti, gan citi praktizējošie ārsti. Tāpēc darbā tika veikta perifēras izcelsmes izometriska slodze, kuras laikā tika veikts elektromiogrammas pieraksts nogurdinātajam muskulim. Iegūtie rezultāti liecina, ka lielākajai daļai personu samazinās m.vastus medialis elektriskā aktivitāte pēc slodzes, veicot stabilometrijas testu, ko, iespējams, var pamatot ar centrālās nervu sistēmas kompensējošo stra…
SIA “Vecsiljāņi“ finanšu analīze un konkurētspējas novērtēšana
2020
Bakalaura darba tēma : SIA „Vecsiljāņi” finanšu analīze un konkurētspējas novērtēšana. Bakalaura darba pētījuma objekts ir SIA “Vecsiljāņi” finanšu stāvoklis un pētījuma priekšmets ir finanšu rezultātu ietekme uz nākotnes darbību un konkurētspēju. Darba mērķis ir izanalizēt un novērtēt lauksaimniecības nozares uzņēmuma SIA „Vecsiljāņi” finanšu stāvokli un konkurētspēju, salīdzinājumā ar nozares konkurentiem. Darba pētījuma periods ir no 2014. gada līdz 2018. gadam. Bakalaura darbā tiek pievērsta uzmanība finanšu analīzes nozīmīgumam, lai izvērtētu esošo situāciju un prognozētu nākotnes darbību, balstoties uz dažādu pētnieku un profesoru metodoloģiju. Darbā tiek novērtēta uzņēmuma konkurētsp…
On the high-pressure phase stability and elastic properties ofβ-titanium alloys
2017
We have studied the compressibility and stability of different β-titanium alloys at high pressure, including binary Ti–Mo, Ti–24Nb–4Zr–8Sn (Ti2448) and Ti–36Nb–2Ta–0.3O (gum metal). We observed stability of the β phase in these alloys to 40 GPa, well into the ω phase region in the P–T diagram of pure titanium. Gum metal was pressurised above 70 GPa and forms a phase with a crystal structure similar to the η phase of pure Ti. The bulk moduli determined for the different alloys range from 97 ± 3 GPa (Ti2448) to 124 ± 6 GPa (Ti–16.8Mo–0.13O).
Photooxidation and stabilization of a solar cell encapsulating crosslinked EVA
2014
Assessment of Physical and Chemical Stability of Different Magnesium Compounds in Tablets
2020
Modern lifestyle, excessive chemicalization of agricultural products, excessive processing and refining of food, cause a decrease in daily intake of magnesium, cation with an extremely important role in prevention and treatment of many diseases. As a result, there arises the need for extra magnesium intake in the form of dietary supplements. In this study were evaluated the physical and chemical stability of magnesium-containing tablets, depending on the active compound and the excipients used. Magnesium tablets in the form of orotate, lactate, citrate, oxide and hydroxide were taken into study and physical and chemical stability were observed over the validity period, at 6 and at 12 month…
The Interconnecting Hairpin Extension "Arm": An Essential Allosteric Element of Phytochrome Activity
2023
In red-light sensing phytochromes, isomerization of the bilin chromophore triggers structural and dynamic changes across multiple domains, ultimately leading to control of the output module (OPM) activity. In between, a hairpin structure, "arm", extends from an interconnecting domain to the chromophore region. Here, by removing this protein segment in a bacteriophytochrome from Deinococcus radiodurans (DrBphP), we show that the arm is crucial for signal transduction. Crystallographic, spectroscopic, and biochemical data indicate that this variant maintains the properties of DrBphP in the resting state. Spectroscopic data also reveal that the armless systems maintain the ability to respond t…
Paleoclimatic changes in the Serravallian record of the Mediterranean area
2004
Plasmid Viability Depends on the Ecological Setting of Hosts within a Multiplasmid Community
2022
Plasmids are extrachromosomal genetic elements, some of which disperse horizontally between different strains and species of bacteria. They are a major factor in the dissemination of virulence factors and antibiotic resistance. Understanding the ecology of plasmids has a notable anthropocentric value, and therefore, the interactions between bacterial hosts and individual plasmids have been studied in detail. However, bacterial systems often carry multiple genetically distinct plasmids, but dynamics within these multiplasmid communities have remained unstudied. Here, we set to investigate the survival of 11 mobilizable or conjugative plasmids under five different conditions where the hosts h…
Competition between chain scission and branching formation in the processing of high-density polyethylene: effect of processing parameters and of sta…
2009
Two samples of high-density polyethylene with different molecular weight were processed in a batch mixer and the rheological and structural properties were investigated. In particular, the effect of different processing parameters and the eventual presence of different stabilizers were evaluated. Actually, two reactions may occur during processing: branching/crosslinking or chain scission. The results indicate that when the processing conditions promote a scarce mobility of the macromolecular chains (lower temperatures, lower mixing speed, and higher molecular weight), branching is more favored than chain scission. On increasing the mobility of the chain (higher temperature, higher mixing s…
Embeddings of Danielewski hypersurfaces
2008
In this thesis, we study a class of hypersurfaces in $\mathbb{C}^3$, called \emph{Danielewski hypersurfaces}. This means hypersurfaces $X_{Q,n}$ defined by an equation of the form $x^ny=Q(x,z)$ with $n\in\mathbb{N}_{\geq1}$ and $\deg_z(Q(x,z))\geq2$. We give their complete classification, up to isomorphism, and up to equivalence via an automorphism of $\mathbb{C}^3$. In order to do that, we introduce the notion of standard form and show that every Danielewski hypersurface is isomorphic (by an algorithmic procedure) to a Danielewski hypersurface in standard form. This terminology is relevant since every isomorphism between two standard forms can be extended to an automorphism of the ambiant …