Search results for "AMA"

Bcl-xL as a Modulator of Senescence and Aging

2021

Many features of aging result from the incapacity of cells to adapt to stress conditions. When cells are overwhelmed by stress, they can undergo senescence to avoid unrestricted growth of damaged cells. Recent findings have proven that cellular senescence is more than that. A specific grade of senescence promotes embryo development, tissue remodeling and wound healing. However, constant stresses and a weakening immune system can lead to senescence chronicity with aging. The accumulation of senescent cells is directly related to tissue dysfunction and age-related pathologies. Centenarians, the most aged individuals, should accumulate senescent cells and suffer from their deleterious effects,…

Zagadnienia teologiczne sakramentu namaszczenia chorych

2016

Z bogatego zakresu problematyki teologicznej nowej liturgii obrzędów sakramentu namaszczenia chorych, zwłaszcza zawartej we wprowadzeniu teologiczno-pastoralnym, w czytaniach biblijnych i tekstach euchologijnych, autor szerzej omawia jedynie zagadnienia podstawowe. Należą do nich: wymiar chrystologiczny i paschalny sakramentu namaszczenia chorych; umacniająca rola Ducha Świętego w życiu chorego; wymiar eklezjalny tego sakramentu. W sposób skrótowy zasygnalizowano jeszcze takie zagadnienia teologiczno-pastoralne, jak: wymiar pokutny sakramentu namaszczenia; sens choroby w ujęciu teologicznym; potrzeba wprowadzenia nadzwyczajnego szafarza (np. diakona stałego); problem udzielania tego sakrame…

Estudio comparativo de la combinación de diferentes modos de administración de anestésicos locales en la analgesia del parto

2020

La analgesia epidural es una de las técnicas más demandadas y por ello dicha analgesia ha ido evolucionando en los últimos años. Recientemente se ha desarrollado el modo PIEB (Programmed Intermittent Epidural Boluses) que puede reducir el consumo de anestésico local y así minimizar consecuencias indeseables tales como la cardio o la neurotoxicidad. En el año 2012 la compañía Smiths Medical lanzó al mercado un sistema de infusión ambulatoria CADD®-Solis versión software 3.0 de la generación de bombas de infusión CADD® que permite combinar varios modos de administración del anestésico local en el espacio epidural, hasta ahora no utilizados juntos ya que no existía en el mercado una bomba con …

Strategy logic of the venture capitalist : understanding venture capitalism - the businesses within - by exploring linkages between ownership and str…

2000

This inductive, exploratory study is aimed at understanding venture capital as a business phenomenon, as someone's business. The mission is to contribute to strategising both inside and outside venture capital companies. The study centres around the 'doctor' whose serum - properly diagnosed, dosed, and injected – shields nations against economic retardation. Defined broadly, venture capitalists are a diverse community ranging from private individual investors to government-owned institutions and from entrepreneurial teams to publicly-held corporations. Empirically, the study investigates missions, organisational and legal structures, and product-market strategies of differently-owned ventur…

Silibin hepatoprotection occur via NFKB signaling inhibition in murine nonalcholic fatty liver disease

2009

Structural properties of core and surface of silica nanoparticles investigated by Raman spectroscopy

2013

We studied the experimental Raman spectra of various commercial silica nanoparticles of average diameter from 7 to 40 nm and specific surface from 50 to 380 m^2/g. We found that the peculiarities of the particles Raman spectra systematically depend on their specific surface. In detail, the peak position of the R band at about 440 cm ^-1 shifts towards high wavenumbers following an almost linear dependence on the specific surface. Similarly, the amplitudes of the D1 and D2 bands, at about 495 and 605 cm ^-1, respectively, increase linearly with the same quantity. Our results are interpreted in the frame of the shell model for the nanoparticles clarifying that the network of the core of the n…

Thioflavin-T doped silica nanoparticles by basic-catalyzed sol-gel synthesis

2014

We developed a basic-catalyzed sol-gel procedure that allows to synthesize silica nanoparticles functionalized with Thioflavin-T (ThT). During the synthesis, the formation of the doped silica nanoparticles was monitored by absorbance spectra indicating that the catalyst does not cause the total hydroxylation of the dye. Fluorescence measurements carried out on the ThT doped silica nanoparticles proved the attachment of ThT on silica and Raman spectroscopy provided information about the dye structure.

Paramagnetic germanium-related centers induced by energetic radiation in silica based devices

2009

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

2017

We investigate the origin of a resonance Raman band induced by ionizing radiation in amorphous silicon dioxide (silica glass), which can be detected under ultraviolet laser excitation. A silica sample, rich of oxygen-excess related defects, was prepared by treating some length of a pure-silica-core multimode fiber in an O2 atmosphere (at high temperature and pressure) and by irradiating it with X-rays at 10 MGy(SiO2) dose. A micro-Raman study revealed a gaussian band peaking at 896 cm−1 with a full width at half maximum of 32 cm−1, which could be detected by exciting the sample with the 325-nm line of a HeCd laser. This spectral feature is absent in the Raman spectra performed with the 442-…

Pulicaria glutinosa Extract: A Toolbox to Synthesize Highly Reduced Graphene Oxide-Silver Nanocomposites

2015

A green, one-step approach for the preparation of graphene/Ag nanocomposites (PE-HRG-Ag) via simultaneous reduction of both graphene oxide (GRO) and silver ions using Pulicaria glutinosa plant extract (PE) as reducing agent is reported. The plant extract functionalizes the surfaces of highly reduced graphene oxide (HRG) which helps in conjugating the Ag NPs to HRG. Increasing amounts of Ag precursor enhanced the density of Ag nanoparticles (NPs) on HRG. The preparation of PE-HRG-Ag nanocomposite is monitored by using ultraviolet-visible (UV-Vis) spectroscopy, powder X-ray diffraction (XRD), and energy dispersive X-ray (EDX). The as-prepared PE-HRG-Ag nanocomposities display excellent surfac…