Recently, there has been an interest in using an argon laser to initiate polymerization of light-activated materials [11]. The argon laser, the active medium of which is argon gas, produces light at two wavelengths. The 488 nm blue light is commonly used to initiate the polymerization of restorative composite materials. The 514 nm blue green light has maximum absorbance in tissues that are comp...

Argon plasma coagulation is increasingly used in endoscopic haemostasis. This case report illustrates the potential for thermal injury at a staple line remote from the area of argon plasma coagulation treatment as a result of electrical arcing. Increasing numbers of colorectal anastomosis and reconstruction procedures are now being performed using stapling techniques and the use of argon plasma...

UNLABELLED Inhaled anesthetics, including the gaseous anesthetics nitrous oxide and xenon, are thought to act by interacting directly with ion-channel receptors. In contrast, little is known about the mechanism of action of inert gases that show only narcotic potency at high pressures, such as nitrogen or argon. In the present study, we investigated the effects of selective gamma-aminobutyric a...

We study the stability of three types of popularly employed TPB coatings under immersion in liquid argon. TPB emanation from each coating is quantified by fluorescence assay of molecular seive filter material after a prolonged soak time. Two of the coatings are shown to emanate a detectable concentration of TPB into argon over a 24 hour period, which corresponds to tens of parts per billion in ...

Through changing the argon pressure, CaB6 films with different crystallographic orientation and morphology on glass substrates were prepared by direct current (DC) magnetron sputtering method. The film textures, crystallite sizes, composition and morphology were investigated by a spectrum of characterizing techniques in terms of X-ray diffraction (XRD), field emission scanning electron microsco...

OBJECTIVE As the contamination of implant surface seriously affects the early osseointegration of implants and reduces the survival rate of implants, it has attracted wide attention of researchers. The most oral titanium implants used in current clinical applications are stored in sealed packages. During the process of packaging, storage and usage, the implants inevitably contact air, which res...

We report an optical dipole trap for calcium. The trap is created by focusing a 488-nm argon-ion laser beam into a calcium magneto-optical trap. The argon-ion laser photoionizes atoms in the trap because of a nearresonance with the 4s4f F3 level. By measuring the dipole-trap decay rate as a function of argon-ion laser intensity, we determine the F3 photoionization cross section at our wavelengt...

Understanding argon release mechanisms in K-bearing minerals is essential in interpreting the ArrAr data and their application to geological studies. The release mechanisms of argon in vacuo have been examined in a series of ArrAr Ž . Ž a. isothermal heating experiments on two biotite specimens with Fer FeqMg Fe s0.50 and 0.87 respectively. The crystal structure of the biotite was also monitore...