The morphology of interpenetrating polymeric networks (IPNs) composed of the temperature-sensitive poly(N-isopropyl acrylamide) (PNIPAAm) and the pH-sensitive poly(methacrylic acid) (PMAA) were investigated by scanning electron microscopy (SEM). The IPN hydrogels were prepared by a sequential UV polymerization method. SEM studies were conducted on IPN hydrogel samples dried by different methods...

We compared the effects of intravenous infusions of 40 micrograms/kg/min verapamil (n = 5), 0.5 microgram/kg/min nimodipine (n = 5), and 5 ng/kg/min prostacyclin (n = 6) and no treatment (n = 6) on local cerebral pH and local cerebral blood flow in middle cerebral artery-occluded rats 90 minutes after the ischemic insult. Local cerebral pH and local cerebral blood flow were determined simultane...

The effects of different pH conditions on enamel erosion repair by nano fluorapatite (n-FA) pastes were evaluated in this study. Eighteen human dental enamel blocks with artificially-induced erosion were randomly divided into three groups that were coated with n-FA pastes with 3 different pH values (pH < 1, pH = 4.5 and pH = 7.5, respectively) for 15 minutes. SEM, XRD, XPS, Vickers microhardnes...

This study was investigated to determine the effect of microbial transglutaminase (MTG) with or without red bean protein isolate (RBPI) on the porcine myofibrillar protein (MP) gel functionality at different pH values (pH 5.75-6.5). Cooking yield (CY, %), gel strength (GS, gf), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) were determined to measure gel charact...

Aspiration of bile is an underpublicized aspiration syndrome. Using a porcine lung model, the physiologic response and the histopathology of lung tissue were evaluated after the intratracheal instillation of sublethal doses of bile. Twenty-one domestic swine (11 to 19 kg) were the studied population. Three groups of five swine were evaluated: a control group received intratracheal physiologic s...

Baboons anaesthetized with halothane and nitrous oxide in oxygen were given Althesin 0.05 ml kg-1 i.v. Cerebral blood flow (c.b.f.) was measured by an electromagnetic flowmeter and by xenon clearance whilst extracellular fluid (e.c.f.) pH of the parietal cortex was measured with a micro pH electrode. Carotid blood flow (carBF) began to decrease and carotid vascular resistance (carVR) to increas...

Chronic myelogenous leukemia (CML) is a clonal disorder of the hematopoietic stem cell characterized by the coexistence of Philadelphia-negative (Ph-) with Ph+ progenitors. CML progenitor cells have been shown to be defective in adherence to marrow stroma. The present study investigated at the cytogenetic level marrow-derived CML clonogenic cells generated from the stroma-adherent cell fraction...