29 research outputs found
Nicotine aversion is mediated by GABAergic interpeduncular nucleus inputs to laterodorsal tegmentum
A segmental interaction model for liquid-liquid equilibria correlation and prediction: Application to the poly(vinyl alcohol)/water system
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Phase Behavior and Miscibility in Binary Blends Containing Polymers and Copolymers of Styrene, of 2,6-Dimethyl-1,4-Phenylene Oxide, and of Their Derivatives
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Estimation of the segmental interaction parameters of polymer blends based on styrene and 2,6-dimethyl-1,4-phenylene oxide derivatives
Using a mean-field model, the segmental interaction parameters of various polymer blends based on styrene and 2,6-dimethyl-phenylene oxide derivatives are revised using new experimental results and the \u27best fit values\u27 are established. The predictive qualities of the model are shown and suggestions about group-contribution method are made, Calculations based on the revised segmental interaction parameters are in excellent agreement with the experimental data
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Miscibility and phase behaviour in poly(2,6-dimethyl-1,4-phenylene oxide) and poly(fluorostyrene-co-bromostyrene) blends
Copolymers of or tho (para )fluorostyrene and ortho(para )bromostyrene with a range of copolymer compositions were prepared by free radical polymerization in toluene solution using azobis(isobutyronitrile). The miscibility and phase behaviour of these copolymers in blends with poly(2,6-dimethyl-l,4-phenylene oxide) (PPO) have been studied by differential scanning calorimetry. Of the four possible copolymer systems, miscibility was observed only for PPO/poly(o-fluorostyreneco-p-bromostyrene) blends in which the copolymer contains between 11 and 73 mo!% p-bromostyrene. High temperature phase separation in the miscible blends is a function of copolymer composition and of the thermal history. The results can be explained on the basis of the mean field theory of phase behaviour for homopolymer--copolymer systems
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Phase behaviour in blends of poly[styrene-co-ortho(para)-bromostyrene] and phenylsulfonated poly(2,6-dimethyl-1,4-phenylene oxide) copolymers
Random copolymers of styrene with ortho- or para-bromostyrene differ substantially in their blend behaviour with partly sulfonylated poly(2,6-dimethyl-l,4-phenylene oxide) (SPPO). Copolymers of styrene with orthobromostyrene exhibit a very narrow window of miscibility in comparison with styrene-para-bromostyrene copolymer blends with SPPOs. The experimental results can be accounted for on the basis of individual segmental interaction parameters by applying mean-field theory
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Miscibility-immiscibility behaviour in blends of phenylsulfonylated Poly(2,6-dimethyl-1,4-phenylene oxide) and Poly(styrene-co-ortho(para)-chlorostyrene)
Phase Behavior in Copolymer Blends of Poly(p-chlorostyrene-co-o-chlorostyrene) and Phenylsulfonylated Poly(2,6-dimethyl-1,4-phenylene oxide)
The miscibility of random copolymers of o-chlorostyrene and p -chlorostyrene [ P (oC1Stco-pC1St)] with partially phenylsulfonylated poly (2,6-dimethyl-1,4-phenylenoex ide)( SPPO) copolymers has been studied, using differential scanning calorimetry (DSC) toestablish Tg behavior. It already has been established that the isomeric effect of the chlorinesubstitution on miscibility is large. Thus the para-chloro-substituted styrenic homopolymeris miscible with all SPPOs containing more than - 5 mol % phenylsulfonylation, whereasthe ortho-chloro-substituted homopolymer is immiscible with the entire range of SPPOcopolymer compositions (and also with the respective homopolymers) . As a result of thisasymmetric behavior of the homopolymers, the width of the window of miscibility in blendsnow investigated containing copolymers with highpClSt content and SPPO is much greaterthan in the corresponding blends containing copolymers with large mole fraction of oC1St.These differences are reflected in the corresponding X parameters calculated from analysisof the data. It was also found that the miscibility is temperature dependent and that theregime in the copolymer-copolymer composition plane shrank as the equilibrium temperatureincreased, results indicative of LCST behavior
A novel Appendicitis TriMOdal prediction Score (ATMOS) for acute appendicitis in pregnancy: a retrospective observational study
Several scoring systems exist for the management of acute appendicitis (AA) during pregnancy. However, the systems are
based on the nonpregnant adult population. The aim of this study was to create a highly accurate scoring system that can be
applied to pregnant women and to compare it to the most commonly used scores in general population and pregnant women.
The creation and subsequent implementation of a highly accurate score system could shorten the diagnostic period and
minimize the use of (ionizing) diagnostic imaging allowing the selection of the best treatment approach in pregnant patients
with acute appendicitis. A single-center, retrospective cohort observational study was conducted at the University Hospital
Centre Zagreb, Zagreb, Croatia. Data were extracted from medical records of pregnant patients with suspected AA from
January 2010 to December 2020. A total of 59 pregnant patients diagnosed with AA during pregnancy were identifed, 41
were treated surgically, and 18 had non-surgical management. The main objective of our study was the detection of predictive
factors of AA during pregnancy. Anorexia, pain migration to the right lower quadrant, rebound pain, axillary temperature
over 37.3 °C, CRP/platelet ratio>0.0422, neutrophil/lymphocyte ratio>7.182, and ultrasonic signs of AA were scored.
Scoring in Appendicitis TriMOdal Score (ATMOS) consists of positive clinical parameter, each bringing 1 point and other
parameters mentioned above that bring 2 points each. The score ranges from 0 to 10. Our model of ATMOS yields a high
area under the receiver-operating characteristic curve of 0.963. The positive likelihood ratio is 9.97 (95% CI 2.64–38.00),
and the negative likelihood ratio is 0.1 (95% CI 0.03–0.31), meaning that 94% of cases with ATMOS>4 have AA, while
less than 13% with an ATMOS≤4 have the diagnosis of AA. The potential of ATMOS diferentiating AA during pregnancy
was demonstrated. Future prospective, randomized trials are needed to evaluate its accuracy and whether it should be used
instead of Alvarado or Tzanakis scores in clinical decision-makin