Nanocrystalline hydroxyapatite was precipitated from calcium hydroxide and phosphoric acid. Effects of precipitation temperature and different calcium to phosphate ratios (Ca/P) on the obtained powders were investigated. Characteriza-tion of the powders was performed using XRD and FTIR spectra, scanning electron microscopy, and transmission electron microscopy. Increase in precipitation t...

A rigid-flexible hybrid hydrogen-bonded organic framework (HOF) with guest-induced reversible crystallinity was designed by Yingjie Zhao and Danbo Wang in their Research Article (e202217903). specific compound, such as hexane, acts a “key” to control the crystallinity, while triangle macrocycle building module is “lock”. The introduction removal of molecule affects local flexibility whole leads...

BACKGROUND In order to generate biofuels, insoluble cellulosic substrates are pretreated and subsequently hydrolyzed with cellulases. One way to pretreat cellulose in a safe and environmentally friendly manner is to apply, under mild conditions, non-hydrolyzing proteins such as swollenin - naturally produced in low yields by the fungus Trichoderma reesei. To yield sufficient swollenin for indus...

Clinicians want to have an effective drug-coated balloon (DCB) that is flexible and has good trackability and pushability to be delivered to the lesion. In addition, particulate embolization and loss of drug in transition are important factors that should be minimized. Arterial healing also plays a key role because in some patients, it may be necessary to shorten dual-antiplatelet therapy. If t...

Poly(viny1 alcohol) (PVA) hydrogels were prepared by treating 15 or 20% aqueous PVA solutions to repeated cycles of freezing for 6 or 12 h at 20°C and thawing for 2 h at 25°C. The resulting gels did not contain any leachable toxic crosslinking agents or other residues. Their adhesive characteristics were examined using tensile experiments in contact with bovine submaxillary mucin. As the number...

nano-zeolite coapo-5 as a member of afi family, was synthesized via a hydrothermal treatment, and structurally characterized using x-ray diffraction (xrd), scanning electron microscope (sem), and energy dispersive x-ray analysis (edax). the effects of crystallization temperature and time on the structure of these powder products were studied. xrd patterns of the synthesized powders revealed a h...