Abstract The collapse of a volcanic flank can be destructive and deadly. Hydrothermal alteration is common to volcanoes worldwide thought promote volcano instability by decreasing rock strength. However, some laboratory studies have shown that not all reduces Our new data for altered rhyodacites from Chaos Crags (Lassen center, California, USA) show pore- crack-filling mineral precipitation red...

Our previous research showed that poly(vinyl alcohol) (PVA) nanoparticles incorporating DNA with hydrogen bonds obtained by high hydrostatic pressurization are able to deliver DNA without any significant cytotoxicity. To enhance transfection efficiency of PVA/DNA nanoparticles, we describe a novel method to prepare PVA/DNA nanoparticles encapsulating nanoscaled hydroxyapatites (HAps) prepared b...

Piezoelectric coupling phenomena in a graphene field-effect transistor (GFET) with a nano-hybrid channel of chemical-vapor-deposited Gr (CVD Gr) and vertically aligned ZnO nanorods (NRs) under mechanical pressurization were investigated. Transfer characteristics of the hybrid channel GFET clearly indicated that the piezoelectric effect of ZnO NRs under static or dynamic pressure modulated the c...

Many different techniques have been used for xylem sap collection, but few direct comparisons of techniques have been conducted and few comparisons have been based on comprehensive analyses of xylem sap. Moreover, the suitability of extraction techniques for use on plants grown under water-stress conditions has not been addressed. Xylem sap was extracted from both well-watered and water-stresse...

In order to quantify changes in total respiratory compliance (Crs) effected by peritoneal pressurization we measured, under standardized anaesthetic conditions and using side stream spirometry Crs in 32 patients scheduled for abdominal surgery through laparoscopic techniques. To qualify the changes in Crs as to the type (duration and patient's position) of surgery, 20 patients having cholecyste...

The treatment of compartment syndromes in which elevation of intracompartmental pressure occurs is by surgical fasciotomy. This is a relatively simple procedure but may be associated with complications. This study aimed at developing an alternative method to decompress a compartment by use of the enzyme hyaluronidase. Autologous plasma was infused into the anterolateral leg compartments of six ...

The involvement of pulmonary circulation in the mechanical properties was studied in isolated rat lungs. Pulmonary input impedance (ZL) was measured at a mean transpulmonary pressure (Ptpmean) of 2 cmH2O before and after physiological perfusion with either blood or albumin. In these lungs and in a group of unperfused lungs, ZL was also measured at Ptpmean values between 1 and 8 cmH2O. Airway re...

Recent analysis of gas outflow histories at wellheads shows that the hydraulic crack spacing must be of the order of 0.1 m (rather than 1 m or 10 m). Consequently, the existing models, limited to one or several cracks, are unrealistic. The reality is 10(5)-10(6) almost vertical hydraulic cracks per fracking stage. Here, we study the growth of two intersecting near-orthogonal systems of parallel...

The mechanical functions of the menisci may be partially performed through the fluid pressurization in articular cartilages and menisci. This creep behavior has not been investigated in whole knee joint modeling. A three-dimensional finite element knee model was employed in the present study to explore the fluid-flow dependent creep behaviors of normal and meniscectomy knees. The model included...