910 research outputs found
Influence of Fluorination on the Solubilities of Carbon Dioxide, Ethane, and Nitrogen in 1‑n‑Fluoro-alkyl-3-methylimidazolium Bis(n‑fluoroalkylsulfonyl)amide Ionic Liquids
International audienceThe effect on gas solubilities of adding partially fluorinated alkyl side chains either on imidazolium-based cations or on bis(perfluoroalkylsulfonyl)amide anions was studied. The aim was to gain knowledge of the mechanisms of dissolution of gases in fluorinated ionic liquids and, if possible, to improve physical absorption of carbon dioxide in ionic liquids. We have determined experimentally, in the temperature range of 298–343 K and at pressures close to atmospheric pressure, the solubility and thermodynamics of solvation of carbon dioxide, ethane, and nitrogen in the ionic liquids 1-octyl-3-methylimidazolium bis[trifluoromethylsulfonyl]amide ([C8mim][NTf2]), 1-octyl-3-methylimidazolium bis[pentafluoroethylsulfonyl]amide ([C8mim][BETI]), 1-(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)-3-methylimidazolium bis[trifluoromethylsulfonyl]amide ([C8H4F13mim][NTf2]), and 1-(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)-3-methylimidazolium bis[pentafluoroethylsulfonyl]amide ([C8H4F13mim][BETI]). Ionic liquids with partial fluorination on the cation were found to exhibit higher carbon dioxide and nitrogen mole fraction solubilities but lower ethane solubilities, compared to those of their hydrogenated counterparts. Molecular simulation provided insights about the mechanisms of solvation of the different gases in the ionic liquids
Preparaciones de base líquida vs. citología convencional: adecuación de las muestras y coincidencia de diagnóstico en lesiones orales
Objetivo: Comparar la efectividad de la muestra y la coincidencia
de diagnostico entre preparaciones de base liquida y
frotis convencionales en lesiones orales, y probar la viabilidad
de la prueba inmuno-citoquimica en preparaciones de base
liquida de lesiones de carcinoma oral. Material y Metodos: Se
obtuvieron muestras de 44 pacientes. Primeramente se prepararon
frotis convencionales, usando un dispositivo cytobrush.
A continuacion se sumergio el cepillo que contenia el material
residual en un liquido conservante. La muestra en el mismo
fue procesada de acuerdo con las indicaciones del fabricante
(AutoCyte, Inc. Elon College, North Carolina, USA). Se
tineron preparaciones de ambas tecnicas de acuerdo con el
metodo de Papanicolaou. Para la prueba inmuno-citoquimica
se usaron conjuntamente AE1/AE3 (Dako, CA, USA) para
las lesiones de carcinoma oral, de acuerdo con el metodo de
la Estreptovidina-biotina-peroxidasa. Se uso la prueba exacta
de Fisher; fijandose la probabilidad significativa en p . 0.05.
Resultados: Ambas tecnicas coincidieron en el diagnostico
citologico en todos los casos donde se uso una muestra adecuada;
en 3 casos el frotis convencional mostro hipocelularidad y, por
lo tanto, resulto inadecuado para el analisis. En el analisis
de muestras, la citologia de base liquida mostro una mejora
general estadisticamente significativa), de un 41% en espesura
de frotis y de un 66% en la distribucion de celulas (p . 0.05),
ademas de una reduccion en la superposicion de celulas y la
presencia de sangre (p . 0.05). La morfologia celular se observó mejor en las preparaciones de base líquida. Las reacciones de la
prueba inmuno-citoquímica fueron positivas en todos los casos
de malignidad, siendo especialmente clara la observación de
células inmuno-marcadas. Conclusión: Tanto las preparaciones
de base líquida como los frotis convencionales son dignos de
confianza desde el punto de vista del diagnóstico; el método de
base líquida mostró una mejora general en la preservación de
muestras, adecuación de ejemplares, observación de morfología
celular y reproducibilidad.Objective: To compare specimen adequacy and diagnostic
agreement between liquid-based preparations and conventional
smears in oral lesions, and to test the viability of immunocytochemical
assay in liquid-based preparations from oral carcinoma
lesions. Material and Methods: Samples were collected from
44 patients. Conventional smears were prepared first, using a
cytobrush device. Then the brush, containing the residual material,
was immersed in a preservative fluid. The sample in the
preservative fluid was processed according to the manufacturer
directions (AutoCyte, Inc. Elon College, North Carolina, USA).
Slides of both techniques were stained by Papanicolaou method.
For immunocytochemical assay, a cytokeratin pool AE1/AE3
(Dako, CA, USA) was applied in liquid-based preparations
from oral carcinoma lesions following the Streptavidin-biotinperoxidase
method. Fisher's exact test was used; significance
was set for p = 0.05.
Results: Both techniques agreed on cytologic diagnosis in every
case they yielded an adequate specimen; in 3 cases conventional
smear resulted in hypocellularity and therefore inadequate for
analysis. On specimen analysis, the liquid-based cytology demonstrated
a statistically significant, 41% overall improvement
in smear thickness and 66% in cell distribution (p = 0.05), and a
reduction in cell overlapping and presence of blood (p = 0.05).
The cell morphology was better visualized in the liquid-based
preparations. The immunocytochemical assay reactions were
positive in all malignant cases, the visualization of the immu-nostained cells being especially clear.
Conclusion: Both, the liquid-based preparation and conventional
smear, are diagnostically reliable; the liquid-based method
showed an overall improvement on sample preservation, specimen
adequacy, visualization of cell morphology and reproducibility
Generalised Hong-Ou-Mandel Experiments with Bosons and Fermions
The Hong-Ou-Mandel (HOM) dip plays an important role in recent linear optics
experiments. It is crucial for quantum computing with photons and can be used
to characterise the quality of single photon sources and linear optics setups.
In this paper, we consider generalised HOM experiments with bosons or
fermions passing simultaneously through a symmetric Bell multiport beam
splitter. It is shown that for even numbers of bosons, the HOM dip occurs
naturally in the coincidence detection in the output ports. In contrast,
fermions always leave the setup separately exhibiting perfect coincidence
detection. Our results can be used to verify or employ the quantum statistics
of particles experimentally.Comment: 11 pages, 2 figures, more references adde
Reação de genótipos de abacaxizeiro ao nematoide Pratylenchus Brachyurus.
Os fitonematoides são considerados um dos principais fatores limitantes ao cultivo do abacaxizeiro. Estes patógenos causam danos consideráveis às raízes das plantas, diminuindo a eficiência das adubações pela redução da absorção de nutrientes. As plantas apresentam sistema radicular reduzido, folhas cloróticas, estreitas e de tamanho reduzido. Consequentemente, a produção é retardada e com frutos de baixo peso e valor comercial reduzido (Arieira et al., 2008)
Association of Injury History and Incident Injury in Cadet Basic Military Training
To determine the association between injury history at enrollment and incident lower extremity (LE) injury during cadet basic training among first-year military cadets
Prevalence of marine litter along the Indian beaches : A preliminary account on its status and composition
Beach litter are man-made objects discarded directly or indirectly. This
study brings out synoptic picture of status and composition of beach
litter from 254 selected beaches along the maritime States of Peninsular
coast of India as well as the Union Territories of Andaman and
Lakshadweep Islands from the one time observation conducted between
October 2013 and January 2014 for the first time. These beaches were
classified and graded with colour codes according to the levels of beach
litter. Beach litter from different maritime States and the UTs showed that
Odisha coast has the lowest (0.31 g/m2) quantity and Goa coast (205.75
g/m2) the highest quantity of beach debris. Archipelagic coasts of
Andamans as well as Lakshadweep recorded values higher than Kerala,
Tamil Nadu, Andhra Pradesh, Odisha and West Bengal. Samples of
debris collected from beaches revealed that all the items were domestic
and anthropogenic discards. Plastic litters such as single use carry bags
and sachets of soft drinks, edible oils, detergents, beverages, cases of
cosmetics, toothpaste, PET bottles, ice cream containers etc., recorded
highest mean of 25.47g/m2 from Goa coast and the lowest (0.08 g/m2)
from Odisha. The relative percentage of mean values of plastic (B group)
items in beach debris along the Indian coast registered highest mean
percentage from Maharashtra (81 %) and the lowest mean from beaches
of Andhra Pradesh (7%). The two island Union Territories registered 40%
(Lakshadweep) and 47% (Andamans) of plastics over the total debris,
while the national average was only 14%.
Available online at: www.mbai.org.in doi: 10.6024/jmbai.2017.59.1.1953-03
Out of the total 254 beaches surveyed, 51 beaches were graded as very
clean with green (<1 g/m2) colour, 122 beaches were graded as Clean
and depicted by blue colour. Beaches of very clean grade (<1 g/m2)
were found in Kerala (17), Maharashtra (12), Tamil Nadu (2), Andhra
Pradesh (4), Odisha (7) and West Bengal (3). Whereas extremely littered
beaches (>100 g/m2) were found in Karnataka (13), Goa, Gujarat, and
Andaman Island. With reference to the coastal population and per capita
share of beach debris, Goa registered highest values (40.97 kg/head)
and the Odisha coast registered the lowest values (0.005 kg/head)
Prognostic factors for response to treatment by corticosteroid injection or surgery in carpal tunnel syndrome (PaLMS study): a prospective multi‐centre cohort study
Introduction: Studies of prognosis for surgery and corticosteroid injection for carpal tunnel syndrome have considered only a limited range of explanatory variables for outcome. Methods: Data were prospectively collected on patient‐reported symptoms, physical and psychological functioning, comorbidity and quality of life at baseline and 6 monthly for up to 2 years. Outcomes were patient‐rated change over a 6‐month period and symptom‐severity score at 18 months. Results: 754 patients with CTS completed baseline questionnaires and 626 (83%) completed follow‐up to 18 months. Multivariable modelling identified, independent of symptom severity at outset, higher health utility, fewer comorbidities and lower anxiety as significant predictors of better outcome from surgery. In patients treated by steroid injection, independent of symptom severity at outset, shorter duration of symptoms and having no prior injection were significant predictors of better outcome. Discussion: These multivariable models of outcome may inform shared decision‐making about treatment for CTS
Determinação da qualidade fisiológica das sementes de soja colhidas no Brasil na safra 2014/15.
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