ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Comparison of muscle activity and occlusal contacts during maximal and habitual clenching in varied chair positions (1997)

KIM, Y.K. ; LEE, S.W. ; CHUNG, S.C. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of oral rehabilitation 24 (1997), S. 0

add to mindlist on the mindlist

Details

ISSN: 1365-2842

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Medicine

Notes: summary The activity of anterior temporal muscle, the number of tooth contacts, and total duration of closure during maximal and habitual clenching were studied in varied chair positions. Fifteen subjects were evaluated. The means for the muscle activity of anterior temporal muscle during habitual clenching were 63.5–73.5% of maximum muscle activity. The number of tooth contacts and total duration of closure were significantly increased as biting pressure was increased from habitual to maximal clenching. No significant differences were detected in all variables among varied chair positions. The above results also suggested that occlusal instability was very common. Further research is required to explain the relationship, if any, of these variables to craniomandibular disorders.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2842.1997.tb00319.x

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Application of EIS to the initial stages of atmospheric zinc corrosion (2000)

Chung, S.C. ; Sung, S.L. ; Hsien, C.C. ; [et al.]

Springer

Journal of applied electrochemistry 30 (2000), S. 607-615

add to mindlist on the mindlist

Details

ISSN: 1572-8838

Keywords: atmospheric corrosion ; EIS ; initial stage ; zinc

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology

Notes: Abstract This paper reports an experimental study of the initial stage of atmospheric zinc corrosion using ex situ electrochemical impedance spectroscopy (EIS) in methanol electrolyte. Compared with the traditional techniques for studying atmospheric corrosion, such as gravimetry, the EIS technique significantly reduced the exposure time for detectable corrosion at any relative humidity from several days to a few hours. The samples were first exposed to synthetic atmospheres with careful control of O2 and CO2 concentrations, relative humidity and temperature. EIS was then used to measure the polarization resistance (R p) of the exposed samples. The corrosion products were analysed by a combination of grazing-angle X-ray diffraction, Fourier transform infrared spectroscopy and photoelectron spectroscopy. Several interesting phenomena occurring in the initial stage of corrosion were demonstrated by studying the electrochemical properties of the surface layer formed on the zinc. At high values of relative humidity (RH 95–100%), with CO2 〉 40 ppm, the R p of the surface film formed increased monotonically with time and relative humidity. At intermediate values of relative humidity (RH 50–85%) in the presence of CO2 (40–500 ppm), R p first increased with time, reached a maximum, then fell from the maximum value before again rising slowly. A brief description of the mechanism of atmospheric zinc corrosion is proposed.