Search results for "LI-"
showing 10 items of 269 documents
Âzykovaâ identičnost' russkoâzyčnyh škol'nikov v Finlândii
1998
Ammattikorkeakouluopiskelijoiden näkemyksiä kielten ja viestinnän opiskelusta moniammatillisissa ryhmissä
2021
Jyväskylän ammattikorkeakoulussa (JAMK) toteutettiin vuosina 2017–2019 kokeilu, jossa suomenkielisten ammattikorkeakoulututkinto-ohjelmien opiskelijat opiskelivat englantia, ruotsia ja viestintää moniammatillisissa ryhmissä. Ennen kokeilun alkua kerättiin JAMKin kielikeskuksen henkilöstöltä näkemyksiä muutoksen mahdollisuuksista ja uhkakuvista. Nämä näkökulmat on raportoitu Kieliverkoston Kieli, koulutus ja yhteiskunta -verkkolehdessä maaliskuussa 2018 (Pollari & Kotikoski 2018a). Nyt raportoitavana on opiskelijoiden näkemyksiä englannin, ruotsin ja viestinnän opiskelusta monialaisissa ryhmissä. Opiskelijapalaute on kerätty kyselyllä vuonna 2018, kun kokeilua oli edennyt reilu vuosi. Kysely…
Putnu daudzveidība un izplatība Rīgas centrālās daļas parkos
2022
Pilsētvidē nepietiekami tiek analizēta tās zaļo zonu urbānā struktūra un to raksturojošie rādītāji, lai novērtētu un saglabātu tajos esošo putnu daudzveidību, tādējādi nodrošinot ilgtspējīgu pilsētas parku pārvaldību. Pētījuma ietvaros tika apsekoti pieci Rīgas pilsētas centrālās daļas parki ar transektu metodi no 2021. gada aprīļa līdz jūnijam, uzkrājot datus par putnu sugu skaitu, daudzumu un izplatību. Izmantojot NMS ordinācijas un regresijas analīzes metodes, dauzveidības un izlīdzinātības indeksus, tika atklāts, ka parku platība statistiski būtiski ietekmē putnu daudzveidību, un parāda koku, ūdensobjektu un niedrāju dzīvotņu nozīmi putnu daudzveidības saglabāšanā.
Synthetic/ECM-inspired hybrid platform for hollow microcarriers with ROS-triggered nanoporation hallmarks
2017
Reactive oxygen species (ROS) are key pathological signals expressed in inflammatory diseases such as cancer, ischemic conditions and atherosclerosis. An ideal drug delivery system should not only be responsive to these signals but also should not elicit an unfavourable host response. This study presents an innovative platform for drug delivery where a natural/synthetic composite system composed of collagen type I and a synthesized polythioether, ensures a dual stimuli-responsive behaviour. Collagen type I is an extracellular matrix constituent protein, responsive to matrix metalloproteinases (MMP) cleavage per se. Polythioethers are stable synthetic polymers characterized by the presence o…
Optimized morphology and tuning the Mn3+ content of LiNi0.5Mn1.5O4 cathode material for li-ion batteries
2023
The advantages of cobalt-free, high specific capacity, high operating voltage, low cost, and environmental friendliness of spinel LiNi0.5Mn1.5O4 (LNMO) material make it one of the most promising cathode materials for next-generation lithium-ion batteries. The disproportionation reaction of Mn3+ leads to Jahn–Teller distortion, which is the key issue in reducing the crystal structure stability and limiting the electrochemical stability of the material. In this work, single-crystal LNMO was synthesized successfully by the sol-gel method. The morphology and the Mn3+ content of the as-prepared LNMO were tuned by altering the synthesis temperature. The results demonstrated that the LNMO_11…
Fabrication of Single Cylindrical Au-Coated Nanopores with Non-Homogeneous Fixed Charge Distribution Exhibiting High Current Rectifications
2014
We have designed and characterized a cylindrical nanopore that exhibits high electrochemical current rectification ratios at low and intermediate electrolyte concentrations. For this purpose, the track-etched single cylindrical nanopore in polymer membrane is coated with a gold (Au) layer via electroless plating technique. Then, a non-homogeneous fixed charge distribution inside the Au-coated nanopore is obtained by incorporating thiol-terminated uncharged poly(N-isopropylacrylamide) (PNIPAM) chains in series to poly(4-vinyl pyridine) (PVP) chains, which are positively charged at acidic pH values. The functionalization reaction is checked by measuring the current–voltage (I–V) curves prior …
Probing the Folding of Peptide–Polymer Conjugates Using the π-Dimerization of Viologen End-Groups
2020
The synthesis of a foldable viologen-functionalized peptide–polymer conjugate is presented. The ABA-type triblock conjugate with a PEG polymer was capped with a FHFHF pentapeptide sequence and further modified with a viologen building block at both chain ends. The pH-responsive peptide domains fold into an intermediate structure inducing close proximity of the viologen units, which upon a reduction step form π-dimers of the radical cation. Overall the intramolecular folding and intermolecular self-assembly process leads to the formation of supramolecular nanorods. Mixing of viologen-peptide–polymer conjugates with unfunctionalized conjugates leads to crosslinking of the nanorods and hydroge…
Response to computer-assisted intervention in children most at risk for mathematics difficulties
2015
Evidence of an association between poor early number skills and a high risk for later difficulties in mathematics manifests a need for both early identification of risk and effective prevention of difficulties. However, only a few theory-based assessment and progress monitoring tools, and intervention methods are avail able for this purpose in Finnish pre-primary education. This thesis aimed to examine to what extent a theory-based computer-assisted intervention method (GraphoGame Math, GGM) can support early number skills development in children (67-year-olds) most at risk for mathematics difficulties (MD; defined as performance below the 10th percentile). The specific aims were threefold…