Search results for "Zen"
showing 10 items of 3479 documents
HPMA-Based Nanoparticles for Fast, Bioorthogonal iEDDA Ligation
2019
Contains fulltext : 216143.pdf (Publisher’s version ) (Open Access) Fast and bioorthogonally reacting nanoparticles are attractive tools for biomedical applications such as tumor pretargeting. In this study, we designed an amphiphilic block copolymer system based on HPMA using different strategies to introduce the highly reactive click units 1,2,4,5-tetrazines (Tz) either at the chain end (Tz-CTA) or statistical into the hydrophobic block. This reactive group undergoes a rapid, bioorthogonal inverse electron-demand Diels-Alder reaction (iEDDA) with trans-cyclooctenes (TCO). Subsequently, this polymer platform was used for the preparation of different Tz-covered nanoparticles, such as micell…
Surface-relief gratings in halogen-bonded polymer-azobenzene complexes A concentration-dependence study
2017
In recent years, supramolecular complexes comprising a poly(4-vinylpyridine) backbone and azobenzene-based halogen bond donors have emerged as a promising class of materials for the inscription of light-induced surface-relief gratings (SRGs). The studies up to date have focused on building supramolecular hierarchies, i.e., optimizing the polymer–azobenzene noncovalent interaction for efficient surface patterning. They have been conducted using systems with relatively low azobenzene content, and little is known about the concentration dependence of SRG formation in halogen-bonded polymer–azobenzene complexes. Herein, we bridge this gap, and study the concentration dependence of SRG formation…
Influence of the polymerization step alone on oxygen affinity and cooperativity during production of hyperpolymers from native hemoglobins with cross…
1994
The aim of this study was to find out how the polymerization per se changes oxygen affinity (P50) and cooperativity (n50) of various soluble huge hyperpolymers prepared from native hemoglobins by crosslinking. Increase of cooperativity would be expected considering natural hemoglobin networks. Those hyperpolymers with molecular weights of some 10(6) g/mol are candidates for artificial oxygen-carrying blood additives rather than volume substitutes. Human and bovine hemoglobin reacted with several crosslinkers (2,5-diisothiocyanatobenzenesulfonate (DIBS); 4,4'-diisothiocyanatostilbene-2, 2'-disulfonate (DIDS); 1,3-butadiene diepoxide (BUDE); glutaraldehyde (GDA)) in concentrated (case 1) and …
Relationship between UVB and broadband solar radiation in Spain
2014
The daily values of UVB irradiation (290–315 nm), IUVB, and the broadband total irradiation (300–2800 nm), IT, measured on a horizontal plane have been correlated for the period 2000–2008 at 16 measurement sites in Spain. The results have been compared with the daily experimental values registered at the same sites during the period 2009–2011. The coefficients of determination R2 obtained by applying a linear regression are higher than 0.88 for all sites and increase to 0.94 when using a quadratic regression. When all data are considered together, the values of R2 are 0.91 and 0.97 for the linear and quadratic regressions, respectively. Three different clearness indices, which are dimension…
La Política de la Educación social en la Europa de las desigualdades
2013
The aim of this research is to analyse some indicators which allow us to understand the current state of social education politics in Europe, with special reference to Spain. Some European and Spanish social and educational policies which try to confront the challenges of the current financial crisis are also explained. Some deficiencies, failures and contradictions attached to the process of the construction of European citizenship are pointed out. Some key topics which seem to foresee a deeper social and democratic crisis apart from the economic one are tackled. It is explained how the new forms of inequality evidence the failure of some of the important declarations of intent and objecti…
Ks. Konstantego Damrota opowieść o polskim Pomorzu (na podstawie Szkiców z ziemi i historyi Prus Królewskich z 1886 r.)
2022
Jedną z ważnych postaci Kościoła katolickiego na Pomorzu był ks. Konstanty Damrot (1841–1895) – syn śląskiej ziemi, wybitny literat, wieloletni dyrektor katolickiego seminarium nauczycielskiego w Kościerzynie. Zachwycony pięknem dawnych Prus Królewskich, w 1886 r. wydał pozycję książkową zatytułowaną Szkice z ziemi i historyi Prus Królewskich, Jego zamiarem było nie tylko opisanie piękna nadmorskiej krainy, ale przede wszystkim obudzenie ducha polskiego w tamtejszych mieszkańcach. Poprzez słowo pisane chciał także spopularyzować historię i kulturę nadmorskiej krainy, przesiąkniętej polskością, zbudowaną na wierze katolickiej i rodzimej tradycji. Autor w krótkiej syntezie przedstawia biogram…
Oblicze demograficzne Opola na początku XXI wieku
2019
Opole jako stolica regionu, który w przeszłości zmieniał przynależność państwową i zasięg terytorialny, co skutkowało wielokrotnymi przesunięciami granic wewnętrznych i zewnętrznych oraz ulegał przemianom kulturowo-cywilizacyjnym, współcześnie doświadcza gwałtownych przeobrażeń społecznych. Jednym z głównych jego problemów jest niekorzystny przebieg procesów demograficznych na przełomie XX i XXI w., m.in. depopulacja. Aktualny obraz demograficzny miasta ukształtowało wiele czynników występujących w przeszłości, a zwłaszcza po zakończeniu II wojny światowej, których skutki miasto nadal odczuwa. Celem artykułu było ukazanie depopulacji wraz z towarzyszącymi jej negatywnymi zjawiskami i proces…
Novel Iron(II) Microporous Spin-Crossover Coordination Polymers with Enhanced Pore Size
2012
In this Communication, we report the synthesis and characterization of novel Hofmann-like spin-crossover porous coordination polymers of composition {Fe(L)[M(CN)4]}·G [L = 1,4-bis(4-pyridylethynyl)- benzene and MII = Ni, Pd, and Pt]. The spin-crossover properties of the framework are closely related to the number and nature of the guest molecules included in the pores.
Power and strategic change in a multinational industrial corporation
2012
PurposeThe aim of the study was to analyze the use of power in a strategic change process within a large forest industry company. The organization in question had a total of 7,700 employees, 6‐8 organizational levels, over 30 production units and a widespread international sales network. The study highlighted the organization's internal narration as an important element in the use of power. It started in conjunction with the appointment of the new management group and continued throughout the two‐year monitoring period, so that gradually all organizational layers were involved in interpreting their roles and positions in the new structure.Design/methodology/approachThe empirical data were c…