Search results for "LOD"

PROPERTIES AND APPLICATIONS OF POLYAMINOCYCLODEXTRIN DERIVATIVES

Nel presente lavoro sono state prese in esame le potenziali applicazioni delle poliamminociclodestrine. In particolare, diversi derivati poliamminociclodestrinici (amCD) sono stati ottenuti utilizzando un approccio sintetico diretto, tramite reazione di sostituzione nucleofila tra la heptakis-(6-deossi)-(6-bromo)-βCD (BrβCD) e poliammine lineari. Una volta effettuata l’opportuna caratterizzazione NMR, ESI-MS e potenziometrica, sono state investigate diverse possibili utilizzazioni di tali materiali. Anzitutto, sono state valutate le capacità di dare complessi di inclusione host-guest con diversi derivati organici sia delle amCD libere che di materiali costituiti da nanospugne a base di amCD…

Evaluation of adsorption ability of Cyclodextrin-Calixarene Nanosponges towards Pb2+ ion in aqueous solution

2021

Abstract Different cyclodextrin-calixarene nanosponges (CyCaNSs) have been characterized by means of FFC-NMR relaxometry, and used as sorbents to remove Pb2+ ions from aqueous solutions. Considering that the removal treatments may involve polluted waters with different characteristics, the adsorption experiments were performed on solutions without and with the addition of background salts, under different operational conditions. The adsorption abilities and affinities of the nanosponges towards Pb2+ ions were investigated by measuring the metal ion concentration by means of Inductively Coupled Plasma Emission Spectroscopy (ICP-OES) and Differential Pulse Anodic Stripping Voltammetry (DP-ASV…

APPLICATION OF FFC-NMR TECHNIQUES FOR THE STUDY OF THE FEATURES OF NANOSPONGES

Fast-Field-Cycling (FFC) NMR relaxometry is a versatile and powerful tool for studying the microscopic dynamics of molecular systems, provided that a suitable analysis of the longitudinal relaxation kinetics and the relevant NMRD (i.e. longitudinal relaxation rate R1 vs. Larmor frequency νL) dispersion curves is performed. In particular, FFC-NMR can afford valuable information on the texture properties (average pore size, specific surface and specific pore volume) of porous materials, once they have been saturated with water. Thus, it appears a technique of choice for assessing the otherwise elusive texture properties of nanosponges (NSs). These hyper-crosslinked polymers, obtained by retic…

The evolution and changing ecology of the African hominid oral microbiome

2021

Significance The microbiome plays key roles in human health, but little is known about its evolution. We investigate the evolutionary history of the African hominid oral microbiome by analyzing dental biofilms of humans and Neanderthals spanning the past 100,000 years and comparing them with those of chimpanzees, gorillas, and howler monkeys. We identify 10 core bacterial genera that have been maintained within the human lineage and play key biofilm structural roles. However, many remain understudied and unnamed. We find major taxonomic and functional differences between the oral microbiomes of Homo and chimpanzees but a high degree of similarity between Neanderthals and modern humans, incl…

Triāžas procesa ietekme uz pacientu aprūpi neatliekamās medicīnas klīnikā

2015

Maģistra darba tēma ir „Triāžas procesa ietekme uz pacienta aprūpi neatliekamās palīdzības klīnikā”. Triāža ir process, ko izmanto, lai šķirotu pacientus pēc prioritātēm attiecībā uz medicīniskās palīdzības saņemšanu. Pareizi veicot triāžu, iespējams veiksmīgi organizēt pacientu plūsmu nodaļā, sniedzot ātrāku palīdzību tiem pacientiem, kuri no tās gūs lielāku labumu. Sakarā ar to, ka tirāža ir samērā jaunā pacientu šķirošanas sistēma Latvijas klīnikās, darba mērķis ir analizēt tirāžas procesu vienā no neatliekamās medicīnas klīnikām. Darba tiek izvirzīta hipotēze, kā arteriālā asinsspiediena noteikšana triāžas etapā ir vienkārša un ērta skrīniga metode, kas ļautu laicīgi atpazīt augsta risk…

Valodu mācīšanās atbalsts un tā vadība neformālajā izglītībā Latvijā

2013

Elektroniskā versija nesatur pielikumus

Muiža Sāras Votersas romānos “Krāpniece” un “Mazais svešinieks”

2016

Šis bakalaura darbs ir veltīts novelēm Mazais Svešinieks (2009) un Krāpniece (2002), kuru autore ir britu rakstniece Sāra Votersa un lauku māju nozīmju interpretāciju. Abas noveles tika starptautiski atzītas. Darba galvenais mērķis ir aplūkot lauku mājas simbola nozīmi un salīdzināt, kas ir kopīgs un atšķirīgs abās novelēs. Pētījumā izmantotas tādas metodes kā teorija par stāstījumu, teorija par Viktorijas un Neo-Viktorijas laikmetu un Gotikas literatūra, teksta analīze un teksta interpretācija par abām novelēm. Šī pētījuma rezultāti parādīja, ka lauku māju apraksts, kuru izveidoja Sāra Voters novelēs Mazais Svešinieks un Krāpniece palīdz lasītājam labāk saprast varoņus un galvenās noveļu i…

A systematic review of animal models for experimental neuroma

2015

Summary Peripheral neuromas can result in an unbearable neuropathic pain and functional impairment. Their treatment is still challenging, and their optimal management is to be defined. Experimental research still plays a major role, but - although numerous neuroma models have been proposed on different animals - there is still no single model recognised as being the reference. Several models show advantages over the others in specific aspects of neuroma physiopathology, prevention or treatment, making it unlikely that a single model could be of reference. A reproducible and standardised model of peripheral neuroma would allow better comparison of results from different studies. We present a…

Selectivity of cyclodextrins as a parameter to tune the formation of pseudorotaxanes and micelles supramolecular assemblies. A systematic SANS study

2011

Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich. This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively. We studied the formation of polypseudorotaxanes formed with cyclodextrins (CDs) threading a copolymer chain that forms self-assembled structures in water. The size of the CD cavity was chosen such that it is block selective with respect to the formation of inclusion complexes and therefore in terms of altering the structure of the copolymer self-assemblies in a systematic fashio…

Interesting dematiaceous Hyphomycetes on Lodoicea maldivica dead frafments

2014

Two new species, Virgariella lodoicea and Cacumisporium oceanicum and a new record of Diplocladiella scalaroides from Seychelles islands are proposed. A species of Helicosporium which could not be determined is also described.i