Search results for "solution"
showing 10 items of 5638 documents
From isolated 1H-pyrazole cryptand anion receptors to hybrid inorganic-organic 1D helical polymeric anion receptors
2015
We report a novel 1-D helical coordination polymer formed by protonated polyamine 1H-pyrazole cryptands interconnected by Cu2+ metal ions that are able to encapsulate anionic species behaving as a multianion receptor. Switching from a monomeric receptor to a polymeric receptor is activated by metal ions and pH.
Rapid self-healing and anion selectivity in metallosupramolecular gels assisted by fluorine-fluorine interactions.
2017
Simple ML2 [M = Fe(II), Co(II), Ni(II)] complexes obtained from a perfluoroalkylamide derivative of 4-aminophenyl-2,2′,6,2′-terpyridine spontaneously, yet anion selectively, self-assemble into gels, which manifest an unprecedented rapid gel strength recovery, viz. self-healing, and thermal rearrangement in aqueous dimethyl sulfoxide. The key factor for gelation and rheological properties emerges from the fluorine–fluorine interactions between the perfluorinated chains, as the corresponding hydrocarbon derivative did not form metallogels. The perfluoro-terpyridine ligand alone formed single crystals, while its Fe(II), Co(II) or Ni(II) complexes underwent rapid gelation leading to highly enta…
Halloysite Nanotubes Coated by Chitosan for the Controlled Release of Khellin
2020
In this work, we have developed a novel strategy to prepare hybrid nanostructures with controlled release properties towards khellin by exploiting the electrostatic interactions between chitosan and halloysite nanotubes (HNT). Firstly, khellin was loaded into the HNT lumen by the vacuum-assisted procedure. The drug confinement within the halloysite cavity has been proved by water contact angle experiments on the HNT/khellin tablets. Therefore, the loaded nanotubes were coated with chitosan as a consequence of the attractions between the cationic biopolymer and the halloysite outer surface, which is negatively charged in a wide pH range. The effect of the ionic strength of the aqueous medium…
Digitarinoita : mitä on koulutusteknologiapuhe ja miksi siihen tulee suhtautua epäillen
2022
Teknologialla on teknisen olemuksensa lisäksi myös kielellinen ulottuvuus, mutta näiden kahden välillä ei välttämättä vallitse juuri minkäänlaista vastaavuussuhdetta. Tästä syystä on tärkeää kyetä erottamaan teknologian realistiset mahdollisuudet koulutusteknologiapuheen maalaamista fantasioista. Tämä artikkeli auttaa lukijaa koulutusteknologiapuheen tunnistamisessa ja kriittisessä tarkastelussa esittelemällä sen kolme tyypillistä olomuotoa; tekno-optimismin, teknosolutionismin ja teknodeterminismin. nonPeerReviewed
Otrējo spirtu dinamiskā kinētiskā sadalīšana
2019
Antrinių alkoholių dinaminė kinetinė rezoliucija. Simonas Balkaitis. Darbo vadovas: Dr. chem. Artis Kinēns. Magistrinį darbą sudaro 63 puslapiai, 10 iliustracijų, 31 schema, 14 lentelių, 1 lygtis, 53 literatūros šaltiniai. Darbas parašytas anglų kalba. Pirmiausia buvo ištirta antrinių alkoholių racemizacija įvairių iridžio, rutenio ir geležies katalizatorių pagalba. Tuomet, racemizacijai tinkamiausiuose tirpiklių variantuose buvo tiriama alkoholių kinetinė rezoliucija. Gauti duomenys buvo panaudoti naujos dinaminės kinetinės rezoliucijos procedūros paieškose.
Kopīpašuma izbeigšana.
2022
Maģistra darba mērķis ir tiesību aktu, judikatūras un tiesību doktrīnas analīze un interpretācija to kopsakarībā, kopīpašuma izbeigšanas problemjautājumu apzināšana un to iespējamo risinājumu piedāvāšana. Darba uzdevumi ir izpētīt kopīpašuma izbeigšanas vēsturisko izcelsmi un attīstību, prasības par kopīpašuma izbeigšanas tiesību saturu un ierobežojumus, analizēt Civillikumā noteiktos kopīpašuma dalīšanas veidus, to piemērošanas kritērijus, apzināt tās ārvalstu tiesību normas, kas attiecas uz kopīpašuma izbeigšanu un salīdzināt ar Latvijā pastāvošo tiesisko regulējumu, sniegt no prakses izrietošo problēmjautājumu apskati, piedāvājot šo problēmjautājumu konkrētus risinājumus, kā arī izvērtēt…
Requirements for using simulation to design and assess wireless ATM handover solutions
1999
Wireless ATM (WATM) has been widely considered as a solution for broadband wireless services. Handover is one of the most important mobility support functions in the WATM network. Many handover solutions have been proposed, analysed, and benchmarked. Simulations have been broadly used to assess these solutions. However, there are many dilemmas in how simulation has been applied as a research methodology: heterogeneous simulation systems used, lack of comparison with other related work, biased conclusions, and unavailability of simulation models and systems to researchers. The WATM research community lacks a standard and commonly acceptable methodology for applying simulation. To address thi…
Przejmowanie wyznaniowych fundacji dobroczynnych w PRL przed wejściem w życie dekretu z dnia 24 kwietnia 1952 roku o zniesieniu fundacji
2017
HIGH QUALITY TEXTURE MAPPING PROCESS AIMED AT THE OPTIMIZATION OF 3D STRUCTURED LIGHT MODELS
2019
Abstract. This article presents the evaluation of a pipeline to develop a high-quality texture mapping implementation which makes it possible to carry out a semantic high-quality 3D textured model. Due to geometric errors such as camera parameters or limited image resolution or varying environmental parameters, the calculation of a surface texture from 2D images could present several color errors. And, sometimes, it needs adjustments to the RGB or lightness information on a defined part of the texture. The texture mapping procedure is composed of mesh parameterization, mesh partitioning, mesh segmentation unwraps, UV map and projection of island, UV layout optimization, mesh packing and mes…
RPAS AND TLS TECNIQUES FOR ARCHAEOLOGICAL SURVEY: THE CASE STUDY OF THE ARCHAEOLOGICAL SITE OF ERACLEA MINOA (ITALY)
2018
Abstract. Digital documentation and 3D modelling of archaeological sites are important for understanding, definition and recognition of the values of the sites and of the archaeological finds. The most part of archaeological sites are outdoor location, but a cover to preserve the ruins protects often parts of the sites. The possibility to acquire data with different techniques and merge them by using a single reference system allows creating multi-parties models in which 3D representations of the individual objects can be inserted. The paper presents the results of a recent study carried out by Geomatics Laboratory of University of Palermo for the digital documentation and 3D modelling of E…