Search results for "substitut"
showing 10 items of 1337 documents
DNA damage response at telomeres boosts the transcription of SARS-CoV-2 receptor ACE2 during aging
2021
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes the coronavirus disease 2019 (COVID-19), known to be more common in the elderly, who also show more severe symptoms and are at higher risk of hospitalization and death. Here, we show that the expression of the angiotensin converting enzyme 2 (ACE2), the SARS-CoV-2 cell receptor, increases during aging in mouse and human lungs. ACE2 expression increases upon telomere shortening or dysfunction in both cultured mammalian cells and in vivo in mice. This increase is controlled at the transcriptional level, and Ace2 promoter activity is DNA damage response (DDR)-dependent. Both pharmacological global DDR inhibition of ATM kin…
Extending existential feeling through sensory substitution
2023
AbstractIn current philosophy of mind, there is lively debate over whether emotions, moods, and other affects can extend to comprise elements beyond one’s organismic boundaries. At the same time, there has been growing interest in the nature and significance of so-called existential feelings, which, as the term suggests, are feelings of one’s overall being in the world. In this article, I bring these two strands of investigation together to ask: can the material underpinnings of existential feelings extend beyond one’s skull and skin? To begin, I introduce and adopt a componential-systemic view of extended affectivity. In doing so, I specify the vehicle externalist criteria for extension em…
Possible Implications for Improved Osteogenesis? The Combination of Platelet-Rich Fibrin With Different Bone Substitute Materials
2021
Bone substitute materials (BSM) are widely used in oral regeneration, but sufficient angiogenesis is crucial for osteogenesis. The combination of BSM with autologous thrombocyte concentrations such as platelet-rich fibrin (PRF) may represent a clinical approach to overcome this limitation. This study analyzes the early influence on osteoblast (HOB) in vitro. Here, four different BSM (allogeneic, alloplastic, and two of xenogeneic origin) were combined with PRF. After the incubation with osteoblasts for 24 h, cell viability, migration, and proliferation were assessed. Next, marker of proliferation, migration, and differentiation were evaluated on gene and protein levels in comparison to the …
Phosphonic Acid Analogues of Phenylglycine as Inhibitors of Aminopeptidases: Comparison of Porcine Aminopeptidase N, Bovine Leucine Aminopeptidase, T…
2019
The inhibitory activity of 14 racemic phosphonic acid analogs of phenylglycine, substituted in aromatic rings, towards porcine aminopeptidase N (pAPN) and barley seed aminopeptidase was determined experimentally. The obtained patterns of the inhibitory activity against the two enzymes were similar. The obtained data served as a basis for studying the binding modes of these inhibitors by pAPN using molecular modeling. It was found that their aminophosphonate fragments were bound in a highly uniform manner and that the difference in their affinities most likely resulted from the mode of substitution of their phenyl rings. The obtained binding modes towards pAPN were compared, with these predi…
Zasięg korporacyjnego upoważnienia aplikanta do zastępstwa
2023
Upoważnienie aplikanta do zastępstwa funkcjonuje od dawna. Jako że ma charakter tylko albo aż upoważnienia korporacyjnego, stąd też na tym tle jest ono różnie postrzegane. Do tego dochodzą dylematy w zakresie pełnienia przez profesjonalnego pełnomocnika funkcji kuratora, a także kwestia udzielenia upoważnienia do zastępstwa dla aplikanta czy nawet substytucji procesowej dla innego profesjonalnego pełnomocnika w osobie adwokata lub radcy prawnego. Wielość wątków z uwagi na szerokie spektrum aktywności aplikanta, co wiązać należy z odbywaną przez niego aplikacją adwokacką albo radcowską, pociąga za sobą konieczność umiejscowienia go w szeroko rozumianym wymiarze sprawiedliwości jako osoby qua…
The comparison of beta-thymosin homologues among metazoa supports an arthropod-nematode clade.
2000
The definition of an Ecdysozoa clade among the protostomians, including all phyla with a regularly molted alpha-chitin-rich cuticle, has been one of the most provocative hypotheses to arise from recent investigations on animal phylogeny. Here we present evidence in favor of an arthropod-nematode clade, from the comparison of beta-thymosin homologues among the Metazoa. Arthropods and nematodes share the absence of the highly conserved beta-thymosin form found in all other documented bilaterian phyla as well as sponges, and the possession of a very unusual, internally triplicated homologue of the beta-thymosin protein, unknown in other phyla. We argue that such discrete molecular character is…
Heterocyclisch anellierte Steroide aus 2-Hydroxymethylen-canrenon
1995
A-ring annulated heterocycles, the isoxazole 6, the pyrazoles 8 and the pyrimidines 9 are prepared starting from 2-hydroxymethylene canrenone 1. Binding studies were carried out with the compounds 1 and 6-8 using estrogen, progesterone, androgen, gluco- and mineralocorticoid receptors as well as the serum proteins SHBG and CBG: the substances were inactive on the receptor level. 1, 7 and 8a show weak binding affinity to CBG.
Bis-organosilane applications and synthesis
2017
Tutkielman kirjallisuusosuudessa perehdytään organofunktionaalisiin silaaneihin. Näitä yhdisteitä käytetään kytkentäaineina komposiittien valmistuksessa sekä monessa muussa sovelluksessa, kuten hydrofobisten ja hydrofiilisten pintojen muodostamiseen, kuivausaineina, ulkoisena elektroniluovuttajana polymeroinnissa, sekä kosteuskovettuvien silaanimodifioitujenpolymeeriliimojen (SMP) kovettumisreaktiossa. Silaanien kosteuskovettuminen johtuu pii-atomiin (Si) sitoutuneiden ryhmien hydrolysoitumisesta kosteuden vaikutuksesta, jolloin syntyy silanoli-ryhmiä (Si-OH), jotka voivat edelleen kondensoitua keskenään muodostaen siloksaanisidoksia (Si-O-Si) tai sidoksia pintojen hydroksyyliryhmien kanssa…
Valoración de la regeneración ósea en un modelo animal: Utilización del plasma rico en plaquetas en la curación de los defectos óseos. Estudio prelim…
2007
INTRODUCCIÓN: Los factores de crecimiento y otras moléculas con capacidad osteoinductora pueden considerarse biomateriales que poseen actividad importante en los procesos de reparación y regeneración de los seres vivos. Esta capacidad puede utilizarse para favorecer, asegurar y aumentar lo procesos de reparación del tejido óseo. En esta tesis doctoral se realiza el estudio de la aplicación aislada en un defecto óseo, de un compuesto rico en plaquetas y factores de crecimiento, el plasma rico en plaquetas (PRP).MATERIAL Y MÉTODO: Hemos realizado un estudio experimental prospectivo, comparativo bilateral y controlado, interviniendo quirúrgicamente 30 conejos raza Nueva Zelanda, a los que se p…
L'impact de la substitution de marques sur l'évaluation et l'intention d'achat du produit.
2008
L'objectif de cet article est de comprendre l'impact de la substitution de marques sur l'évaluation et l'intention d'achat du produit. À cette fin, les différents types de substitutions de marques sont présentés. Puis, à partir des travaux relatifs à l'extension de marque et au co-marquage, des variables susceptibles d'expliquer l'évolution de l'évaluation et de l'intention d'achat d'un produit qui a changé de nom de marque sont proposées. L'étude empirique met en évidence que cinq variables influencent l'évolution de l'évaluation et de l'intention d'achat du produit qui a changé de nom de marque: (1) la similarité entre la marque de substitution et la marque initiale, (2) la cohérence per…