Specular X-ray reflectivity (XR) and quartz crystal microbalance (QCM) measurements were used to determine the absorption of water into thin poly(4-ammonium styrenesulfonic acid) films from saturated vapor at 25 degrees C. The effect of film thickness on the absorption kinetics and overall absorption was investigated in the range of thickness from (3 to 200) nm. The equilibrium swelling of all ...

in this research,the effect of power ultrasound (20 khz ,800 and 1000w) at 20.40 and 60 minutes on physico-chemical properties of two rice varieties tarom and neda was investigated and by the soaking method in controlled temperature (47°c) compared.results showed the maximum amount of water absorption of rice, observed at 60 minutes ultrasound treatment (1000w) and the lowest was observed in co...

a chelating resin of polystyrene divinylbenzene resin functionalized by 1-(2-pyridylazo) 2- naphtol (psdvb-pan) has been synthesized and its sorption properties have been investigated for preconcentration and determination of cadmium at μg/l level by flame atomic absorption spectrometry. the procedure is based on the sorption of cd(ii) ions on a minicolumn of synthesized chelating resin. the re...

hydrothermal treatment of wood material products with many interesting properties such as enhanced dimensional stability, lower equilibrium moisture content and increased biological durability. the effects of hydrothermal treatment on dimensional stability, oven dry density and water absorption of beech wood (fagus orientalis) naturally grown, has been studied in present research that extremely...

a type of novel hypercross-linked fiber adsorbent was obtained by sulfonation and cross-linking reaction of polypropylene fiber grafted styrene-divinylbenzene. the aim of the fiber sulfonation and cross-linking method was to prepare rigid three dimensional networks in the entire fiber and change the ion exchange capacity of fiber. the hypercross-linked fiber adsorbent possesses a principally di...

Pathophysiological studies have shown that the alveolocapillary transfer of small solutes is much faster in healthy smokers than in non-smokers. The effects of smoking on the pulmonary absorption of inhaled terbutaline were examined in normal subjects. Nine healthy smokers and 13 healthy non-smokers inhaled nebulised terbutaline and dry terbutaline powder on two study days. Plasma concentration...

The use of hydrogels in wound dressings, which is pivotal for effective treatment, has been widely applied to diverse medical conditions. However, formulating natural that combine robust strength and self-healing capabilities a significant challenge. To overcome this, we successfully designed nanocellulose hydrogel can quickly self-heal restore the complete structure after injury fill injured a...

background during abdominal surgery under regional anesthesia, nausea may happen due to several contributing factors. this study compared the effects of ondansetron and dexamethasone on nausea and vomiting under spinal anesthesia. methods one hundred and twenty patients of 15 to 35 years old with asa class i and ii were enrolled. before administering either ondansetron or dexamethasone, blood p...