Search results for "note"
showing 10 items of 10709 documents
Evaluation of efficacy and biocompatibility of a new absorbable synthetic substitute as a dural onlay graft in a large animal model.
2016
Numerous dura substitutes are commercially available, but no absorbable synthetic dura repair product has been used for both onlay and suture applications.The safety and effectiveness of a new absorbable synthetic substitute composed of Poly-L-lactide microfibers as onlay dural graft were evaluated.Physical properties and performance of the microfibrous synthetic dural substitute implanted as an onlay or suturable grafts were compared with these commercial products, including CODMAN ETHISORB™ Dura Patch and DuraGen™ Dural Graft Matrix, in a canine duraplasty model. The cerebrospinal fluid (CSF) leakage, macroscopic and microscopic observation at 30 and 90 days after implantation were invest…
Le festival Why Note : musique contemporaine et création
2011
Mācību disciplīnas veidošanās 7.-8.klašu skolēniem mācību procesā pamatskolā
2021
Mācību disciplīnas problēmas aktualitāte skolās saglabājas nemainīgi augsta, to pierāda dažādi starptautiski pētījumi, kuri veikti Amerikā, Āzijā, Āfrikas valstīs un Eiropā. OECD veiktie pētījumi tās dalībvalstīs, liek konstatēt, ka mācību disciplīna ir cieši saistīta ar stundu kavēšanu un skolēnu negatīvu attieksmi pret skolu un mācību procesu kopumā. Neskatoties uz to, ka ir izstrādāti dažādi metodiskie materiāli un ieteikumi skolotājiem, mācību disciplīna, joprojām tiek pārkāpta un veidojas neproduktīva mācību vide, kurā skolēnam ir grūtāk apgūt mācību saturu un pilnveidot savu personību kopumā. Analizētie OECD pētījumi pierāda, ka skolotājs lielu daļu no mācību stundas laika velta tieši…
Piesārņojuma novēršanas tiesiskais regulējums lauksaimniecībā
2020
Maģistra darbā “Piesārņojuma novēršanas tiesiskais regulējums lauksaimniecībā” tiek aplūkoti priekšnoteikumi dažādu potenciāli piesārņojošu vielu lietošanai lauksaimniecībā, lai mazinātu piesārņojuma iespējamību. Darbā analizēts izkliedējošā (difūzā) piesārņojuma regulējums un ar to saistītā problemātika lauksaimniecībā. Autore darba izstrādes gaitā konstatējusi vairākas problēmas, kas pastāv tiesiskajā regulējumā, pētot dažādas publikācijas, normatīvos aktus, literatūru un citus avotus. Darbā piedāvāti risinājumi problēmu novēršanai, pilnveidojot normatīvo regulējumu un novēršot konstatētās nepilnības. Kā secināja autore, piesārņojuma uzraudzība lauksaimniecībā ir sarežģīta un tiek realizē…
Computer Simulations of the Band Structure and Density of States of the Linear Chains of NaCl Ions
2019
The authors thank Eugene Kotomin and V. Kuzovkov for fruitful discussions and valuable suggestions. A.I.P thanks A.Moskina for the technical assistance in preparation of the manuscript. A.I.P also gratefully acknowledges a project LZP-2018/1-0214 from the Latvian Council of Science for partial support.
Purification of Nano-Porous Silicon for Biomedical Applications
2011
Recently, various bio-medical applications of nanoporous silicon (np-Si) have been suggested. This work investigates the biocompatibility of np-Si particles taking into account hazardous residua confined in the pores after preparation. The emphasis is on the potential application of such particles as oxygen photosensitizer for photodynamic therapy of cancer, which requires both negligible toxicity of np-Si particles in darkness and a high photo-cyto-toxic effect due to generation of singlet oxygen under illumination. Considerable amounts of water soluble toxic impurities are found to be present in the nanoporous shell of micrometer-sized np-Si particles immediately after their preparation b…
Review: Electrostatically actuated nanobeam-based nanoelectromechanical switches – materials solutions and operational conditions
2018
This review summarizes relevant research in the field of electrostatically actuated nanobeam-based nanoelectromechanical (NEM) switches. The main switch architectures and structural elements are briefly described and compared. Investigation methods that allow for exploring coupled electromechanical interactions as well as studies of mechanically or electrically induced effects are covered. An examination of the complex nanocontact behaviour during various stages of the switching cycle is provided. The choice of the switching element and the electrode is addressed from the materials perspective, detailing the benefits and drawbacks for each. An overview of experimentally demonstrated NEM swi…
Intelligent papers
2006
Supramolecular Modification of ABC Triblock Terpolymers in Confinement Assembly
2018
The self-assembly of AB diblock copolymers in three-dimensional (3D) soft confinement of nanoemulsions has recently become an attractive bottom up route to prepare colloids with controlled inner morphologies. In that regard, ABC triblock terpolymers show a more complex morphological behavior and could thus give access to extensive libraries of multicompartment microparticles. However, knowledge about their self-assembly in confinement is very limited thus far. Here, we investigated the confinement assembly of polystyrene-block-poly(4-vinylpyridine)-block-poly(tert-butyl methacrylate) (PS-b-P4VP-b-PT or SVT) triblock terpolymers in nanoemulsion droplets. Depending on the block weight fractio…
Elongation and plasmonic activity of embedded metal nanoparticles following heavy ion irradiation
2023
Shape modification of embedded nanoparticles by swift heavy ion (SHI) irradiation is an effective way to produce nanostructures with controlled size, shape, and orientation. In this study, randomly oriented gold nanorods embedded in SiO2 are shown to re-orient along the ion beam direction. The degree of orientation depends on the irradiation conditions and the nanorod's initial size. SHI irradiation was also applied to modify spherical metallic nanoparticles embedded in Al2O3. The results showed that they elongate due to the irradiation comparably to those embedded in SiO2. Metallic nanostructures embedded in dielectric matrices can exhibit localized surface plasmon (LSP) modes. The elongat…