Search results for "SID"
showing 10 items of 6756 documents
Antibacterial activity and cytotoxicity of selected Egyptian medicinal plants.
2011
Medicinal plants have been used as a source of remedies since ancient times in Egypt. The present study was designed to investigate the antibacterial activity and the cytotoxicity of the organic extracts from 16 selected medicinal plants of Egypt. The study was also extended to the isolation of the antiproliferative compound jaeschkeanadiol p-hydroxybenzoate (FH-25) from Ferula hermonis. The microbroth dilution was used to determine the minimal inhibitory concentration (MIC) of the samples against twelve bacterial strains belonging to four species, Providencia stuartii, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli, while a resazurin assay was used to assess the cytoto…
In-Depth Characterization of Bioactive Extracts from Posidonia oceanica Waste Biomass
2019
© 2019 by the authors.
Analisi fotoelastica delle tensioni residue nel vetro
2010
ANALISI DELLE TENSIONI RESIDUE NEI VETRI MEDIANTE FOTOELASTICITÀ RGB E LASTRA A TINTA SENSIBILE
2012
L'analisi delle tensioni residue nel vetro viene solitamente effettuata mediante metodi fotoelastici. Questo lavoro considera l'automazione del metodo fotoelastico in luce bianca basato sull'uso congiunto della fotoelasticità RGB e di una lastra a tinta sensibile (full wave plate o tint plate), che manifesta il ritardo di un ordine di frangia, posta in serie alla lastra di vetro. Il metodo proposto è stato applicato all’analisi delle tensioni residue membranali in un vetro temperato.
ANALISI DELLE TENSIONI RESIDUE NEL VETRO MEDIANTE LA FOTOELASTICITÀ CON FRANGE DI RIFERIMENTO
2011
L’analisi delle tensioni residue nei vetri viene di solito effettuata con metodi fotoelastici dato che il vetro è un materiale birifrangente. Questa memoria considera l’automazione del cosiddetto "test fringes” metodo che si basa sull’impiego di un compensatore di Babinet o di un provino inflesso. In particolare si propongono due metodi automatici basati sull’impiego del metodo del centro frangia in luce monocromatica e sull’impiego della fotoelasticità RGB in luce bianca. I metodi proposti possono efficacemente sostituire i metodi manuali.
Thermodynamically driven self-assembly of pyridinearene to hexameric capsules
2019
Pyridinearene macrocycles have previously shown unique host–guest properties in their capsular dimers including endo complexation of neutral molecules and exo complexation of anions. Here, we demonstrate for the first time the formation of hydrogen bonded hexamer of tetraisobutyl-octahydroxypyridinearene in all three states of matter – gas phase, solution and solid-state. Cationic tris(bipyridine)ruthenium(II) template was found to stabilize the hexamer in gas phase, whereas solvent molecules do this in condensed phases. In solution, the capsular hexamer was found to be the thermodynamically favoured self-assembly product and transition from dimer to hexamer occurred in course of time. The …
Role of Weak Hydrogen Bonds and Halogen Bonds in 5-Halo-1,3-dimethyluracils and Their Cocrystals : A Combined Experimental and Computational Study
2016
Seven single crystals containing either N,N-dimethyluracil (DMHU) or one of its 5-halogenated derivatives (DMXU; X = F, Cl, Br, I) were prepared using N,N-dimethylformamide as the crystallization solvent. Single crystal X-ray diffraction and quantum chemical calculations carried out at the spin component scaled local MP2 level of theory were then used to study the intramolecular halogen and nonconventional hydrogen bonds present in the structures. The results were compared to and contrasted with the previously reported data for uracil and its halogenated derivatives. In particular, the intermolecular interactions in DMIU were compared to the halogen and hydrogen bonds in 5-iodouracil that, …
Apkārtējai videi draudzīga prakse, veicot vispārējo anestēziju
2022
Ievads: Vispārējā anestēzijā izmantotās zāļu vielas ir siltumnīcas efektu izraisoši ķīmiskie savienojumi, daži no tiem ar ozona slāni noārdošu iedarbību. Lai gan šo gāzu daudzums, salīdzinājumā ar citiem piesārņotājiem ir neliels, šīs vielas rada izteiktu siltumnīcefektu. Ir jāveicina anesteziologu informētība par šiem efektiem, un praksē jālieto stratēģijas anestēzijas gāzu izmešu mazināšanai. Nav zināms, cik informēti par gaistošo anestētiku ietekmi uz vidi ir anesteziologi Latvijā un cik plaši praksē tiek lietota zemas plūsmas anestēzija ar mērķi mazināt vides piesārņojumu. Materiāli un metodes: Pētījuma instruments – aptaujas anketa, Traumatoloģijas un ortopēdijas slimnīcas anestēzijas …
Opciones alternativas para prescribir actividad física entre niños y adolescentes obesos: marcha rápida con el apoyo de videojuegos activos
2015
Background: Physical inactivity has been identified as an important public health concern for children. An increasing sedentary way of life is directly related to obesity; hence, prevention and management of childhood obesity are commonly based on lifestyle interventions wherein increasing physical activity is one of the main targets. The use of exergames can be useful in promoting physical activity, but it is necessary more research. This study analyzes the effects of an exergaming platform that involves brisk walking, on perceived exertion, self-efficacy, positive expectations and satisfaction in a sample of clinically obese children, as compared with normal weight children. Physiological…
Augsta tauku satura maltītes rosinātas izmaiņas organisma enerģētiskajā vielmaiņā fiziski trenētām un netrenētām jaunām sievietēm
2017
Darba mērķis bija novērtēt regulāras fiziskas slodzes ietekmi uz vielmaiņu un enerģētisko substrātu izmantošanu miera apstākļos. Pētījumā piedalījās 14 jaunas, klīniski veselas sievietes vecumā no 21 līdz 28 gadiem, no kurām sešas spēlē florbola komandā un regulāru treniņu laikā (3-4 reizes nedēļā) veic augstas intensitātes jauktu (aerobu/anaerobu) slodzi, savukārt astoņas sievietes ir ar zemu kustību aktivitāti ikdienā. Pētījuma dalībniekiem noteica ķermeņa audu kompozīciju, izmantojot antropometrijas un ultrasonogrāfijas metodi, kā arī noteica vielmaiņas intensitāti, ogļhidrātu un tauku oksidācijas intensitāti un triglicerīdu un glikozes koncentrāciju kapilārajās asinīs četru stundu laikā…