Search results for "PC"
showing 10 items of 2805 documents
Computational Studies of the Structure and of the Proton Transport Phenomena in Systems Derived from Barium Cerate Perovskite Structure
2007
The final task of the whole research project is the design of new ceramic materials for protonic conduction in the range of temperature 350-750 °C. To this aim, it was planned to deepen the information on the systems obtained by doping the Ce site in the BaCeO3 perovskite matrices. In these compounds, cerium has been substituted by trivalent elements (Y, In), thus creating – to fulfill charge neutrality – oxygen vacancies that could be filled by hydroxyls groups. In this way protons have been introduced in the structure. These materials are currently investigated by both experimental and computational approaches to integrate framework structure and proton transport phenomena analyses. Due t…
Statistical analysis of the performances of PC/CNTs nanocomposites
2013
Validation and application of a PCR primer set to quantify fungal communities in the soil environment by real-time quantitative PCR
2011
Fungi constitute an important group in soil biological diversity and functioning. However, characterization and knowledge of fungal communities is hampered because few primer sets are available to quantify fungal abundance by real-time quantitative PCR (real-time Q-PCR). The aim in this study was to quantify fungal abundance in soils by incorporating, into a real-time Q-PCR using the SYBRGreen (R) method, a primer set already used to study the genetic structure of soil fungal communities. To satisfy the real-time Q-PCR requirements to enhance the accuracy and reproducibility of the detection technique, this study focused on the 18S rRNA gene conserved regions. These regions are little affec…
Insights on Hydrothermal‐Magmatic Interactions and Eruptive Processes at Poás Volcano (Costa Rica) From High‐Frequency Gas Monitoring and Drone Measu…
2019
Texto completo del documento Identification of unambiguous signals of volcanic unrest is crucial in hazard assessment. Processes leading to phreatic and phreatomagmatic eruptions remain poorly understood, inhibiting effective eruption forecasting. Our 5‐year gas record from Poás volcano, combined with geophysical data, reveals systematic behavior associated with hydrothermal‐magmatic eruptions. Three eruptive episodes are covered, each with distinct geochemical and geophysical characteristics. Periods with larger eruptions tend to be associated with stronger excursions in monitoring data, particularly in SO2/CO2 and SO2 flux. The explosive 2017 phreatomagmatic eruption was the largest erupt…
Malestar emocional y percepción de amenaza en familiares de personas afectadas por COVID-19
2021
Los familiares de personas afectadas por la COVID-19 pudieron experimentar mayor impacto emocional durante el confinamiento, más aún si se tenía una imagen muy amenazante del COVID-19. El objetivo fue analizar la relación entre la psicopatología y la percepción de amenaza en familiares de personas afectadas por COVID-19. Participaron 50 familiares de personas afectadas por COVID-19 (84% mujeres), de entre 20 y 63 años (M=36,88; DT=12,73). Se evaluó la psicopatología (SCL-90-R; Derogatis, Lipman y Covi, 1973) y la percepción de amenaza del COVID (BIP-Q5; Pérez-Fuentes, Molero, Oropesa et al., 2020). Observamos una afectación emocional y una percepción de amenaza moderadas. Quienes tenían enf…
Binocular vision alterations after refractive and cataract surgery: a review.
2018
To review binocular and accommodative disorders documented after corneal or intraocular refractive surgery, in normal healthy prepresbyopic patients. A bibliographic revision was performed; it included works published before 1st July 2017 where accommodation and/or binocularity was assessed following any type of refractive surgical procedure. The search in Pubmed yielded 1273 papers, 95 of which fulfilled the inclusion criteria. Few publications reporting binocular vision and/or accommodative changes after refractive surgery in normal subjects were found. The reduction in fusional vergence is the most frequently reported alteration. Anisometropia is an important risk factor for postoperativ…
HCV vīrusa genomu CORE/ARFP reģiona sekvenču analīze
2015
C hepatīta vīruss (HCV) – pieder flavivīrusu dzimtai. HCV ir apvalku saturošs vīruss. HCV var izraisīt tikai cilvēka un augstāko primātu slimības. C hepatīta vīrusa (HCV) ierosināta infekcija ir pasaulē izplatīts iemesls hroniskām aknu slimībām. Pret HCV vēl nav izstrādāta vakcīna. HCV ir pirmais vīruss, kas ir atklāts ar molekulārās klonēšanas palīdzību, bez tiešas bioloģisko vai biofizikālo metožu palīdzības. Galvenā HCV vīrusa īpatnība ir izteikta ģenētiskā mainība. ARFP (alternatīvās nolasīšanas rāmja proteīns) jeb F (nobīdes), jeb core +1 proteīns (17 kDa) ir radies ribosomu -2/+1 nobīdes rezultātā N-gala core -kodēšanas reģionā HCV poliproteīnā. Joprojām nav zināma ARFP bioloģiskā fun…
G-CLASS: geosynchronous radar for water cycle science – orbit selection and system design
2019
The mission geosynchronous – continental land atmosphere sensing system (G-CLASS) is designed to study thediurnal water cycle, using geosynchronous radar. Although the water cycle is vital to human society, processes on timescalesless than a day are very poorly observed from space. G-CLASS, using C-band geosynchronous radar, could transform this. Itsscience objectives address intense storms and high resolution weather prediction, and significant diurnal processes such assnow melt and soil moisture change, with societal impacts including agriculture, water resource management, flooding, andlandslides. Secondary objectives relate to ground motion observations for earthquake, volcano, and subs…
Sorpcja miedzi w glonach morskich Laminaria ochroleuca bachelot de la pylaie= Sorption of copper in marine algae Laminaria ochroleuca bachelot de la …
2015
Przedmiotem badań było określenie stopnia zanieczyszczenia metalami ciężkimi ekosystemów wodnych, analizując próbki wody oraz osadów dennych zbiorników wód powierzchniowych na terenie parków miejskich rejonu Wałbrzycha. Zawartość metali w wodzie uszeregowano następująco: Zn > Cu > Pb > Ni > Cd. Wody z analizowanych stanowisk badawczych charakteryzowały się podwyższonym stężeniem kadmu, a zbiornik Nowe Miasto dodatkowo znaczącym stężeniem Pb. Koncentracje Cu, Ni oraz Zn nie stanowiły zagrożenia dla funkcjonowania ekosystemów wodnych. Koncentracja metali w osadach dennych stanowiła szereg: Zn > Pb > Cu > Ni > Cd. Badania osadów dennych, pobranych ze zbiorników, nie wykazały znaczącego zaniecz…
Translocation of Cations During Sorption of Copper in the System Solution - Algae (Spirogyra sp.)/Translokacja Kationów Podczas Procesu Sorpcji Miedz…
2014
Zbadano kinetykę procesu sorpcji kationów miedzi w glonach Spirogyra sp. oraz towarzyszące mu procesy sorpcji kationów wodorowych i procesy uwalniania do roztworu kationów związanych w glonach: Na+, Mg2+, K+ i Ca2+. Stwierdzono, że w układzie statycznym, przy stałym stosunku masy glonów do objętości roztworu, procesy te zachodzą równocześnie, przy czym należy przypuszczać, że ilość uwalnianych soli ma wpływ na parametry heterofazowej równowagi wymiany jonowej. W warunkach prowadzenia eksperymentu ilość uwolnionych kationów była blisko 10-krotnie większa niż ilość kationów sorbowanych. Porównano parametry równowagi wyznaczone z modelu reakcji pseudo-drugiego rzędu z parametrami uzyskanymi po…