José Herráez

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The mechanism underlying propylene glycol (PG) effects on acyclovir (ACV) penetration through human epidermis were studied. Solvent systems and Carbopol gels containing increasing percentage of PG (from 0% to 70%, w/w) were used. Viscosity studies of both vehicles were carried out to characterise the influence of rheological behaviour. In solvent systems(More)
Infrared thermography has proved to be an adequate technique for building inspection, as it can be used to determine energy efficiency through the measurement of heat losses, air leaks and infiltrations, and also to detect humidity areas. These parameters have great influence in energy consumption of buildings and in their users' well-being, which is(More)
A study is made of the polymerization process of polyacrylic acid, commercially known as Carbopol 971 NF, assessing its consistency as a function of the degree of neutralization at pH values from 3 to 12, approximately. Percentage concentrations ranging from 0.1 to 1.4% (w/w) were studied. The gels obtained were non-Newtonian, and pseudoplastic. As(More)
Photogrammetry is a science with many fields of application in civil engineering where image processing is used for different purposes. In most cases, the use of multiple images simultaneously for the reconstruction of 3D scenes is commonly used. However, the use of isolated images is becoming more and more frequent, for which it is necessary to calculate(More)
Eighty used and 20 new silicone, polyurethane and polyvinylchloride central venous catheters were tested to establish the Young's modulus and the bending stiffness of the catheters and their introducers. The catheters were subjected to longitudinal traction forces and their lengthening measured. Young's modulus and the geometric moment of inertia were then(More)
A 41-year old male who presented for blood donation for the first time was rejected on the grounds of a positive reaginic serological test (VDRL and RPR) and a specific antitrepomena test (FTA) for syphilis. Later studies revealed the existence of a lupus anticoagulant and this was made responsible for the positive serology. Our observation suggests the(More)
Image epipolarization in photogrammetry is a common technique used to determine relative orientation based on collinearity and coplanarity, which usually requires scenes with multiple images. In general, these processes require internal orientation parameters, therefore the knowledge of camera calibration and relative orientation parameters between images.(More)
Image processing in photogrammetry is commonly used for scene reconstruction. Although two-dimensional applications can be solved using isolated images, reconstruction of three-dimensional scenes usually requires the use of multiple images simultaneously. Epipolar image rectification is a common technique for this purpose. It typically requires internal(More)