Understanding wetting behavior and surface coverage of resins on a wood surface is important to obtain satisfactory adhesion and optimize adhesive application for wood composite manufacturing. Sessile and micro-droplets of ureaand phenol-formaldehyde (UF and PF) resins were generated on wood surfaces to observe wetting behaviors using three directional image generation system and atomic force m...

Determination by thermomechanical analysis (TMA) of the average number of degrees of freedom of polymer segments between crosslinking nodes of phenolformaldehyde (PF) resin-hardened networks indicate that additive-accelerated PF resin polycondensations and hardening presented several different acceleration mechanisms. Some additives such as sodium carbonate appear to present purely an accelerat...

Impregnating wood, assisted with ultrasound technology, could improve the impregnation efficiency by improving the permeability of wood, thus affecting the subsequent drying process. Poplar lumber and phenolic resin were applied to investigate the influence of ultrasound-assisted impregnation on the wood drying process. The ultrasonic frequency and processing time were analyzed and correlated. ...

From the overground parts of an endemic Sideritis species, S. stricta, 4 diterpenes, sideridiol (1), isosidol (2), isolinearol (3), and linearol (4); 2 flavonoid glycosides, isoscutellarein 7-O-[6′′′-O-acetyl-β-Dallopyranosyl-(1→2)]-β-D-glucopyranoside (5), and isoscutellarein 7-O-[6′′′-O-acetyl-β-D-allopyranosyl(1→2)]-6′′-O-acetyl-β-D-glucopyranoside (6); a methoxyflavone, xanthomicrol (7); an...

DR. AGNES C. VIETOR.Mr. President, I have been very much interested in the discussion on typhoid and paratyphoid fever, particularly because I have, in common with other practitioners, had cases of typhoid fever, clinical typhoid, that did not give the laboratory reaction. In reading a number of articles on this subject, within recent times, I was impressed with the resemblance of the problem t...

“Fachbereich fir Bauingenieurwesen, Labor fir Abfallwirtschaft, Siedlungswasserwirtschaft, Umweltchemie (LASU) , Fachhochschule Mtinster, D-48149 Mtinster, Germany ‘Pharmazeutisches lnstitut Poppelsdorf, Rheinische FriedrichWilhelmsUniversittit Bonn, Kreuzbergweg 26, D-531 15 Bonn, Germany ‘Departamento de Microbiologia, Facultad de Farmacia, Universidad de Granada, 18071 Granada, Spain dDepart...