Tendon-defect and muscle-unloaded models for relating a rotator cuff tear to glenohumeral stability

CMUR > China Medical University Hospital > Jurnal articles > Item 310903500/30137

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Title:	Tendon-defect and muscle-unloaded models for relating a rotator cuff tear to glenohumeral stability
Authors:	Hsu, HC;Boardman, ND;Luo, ZP;An, KN
Contributors:	附設醫院眼科部;China Med Coll Hosp, Dept Orthopaed Surg, Taichung, Taiwan;Mayo Clin & Mayo Fdn, Orthoped Biomech Lab, Rochester, MN 55905 USA
Date:	2000
Issue Date:	2010-09-24 14:49:54 (UTC+8)
Publisher:	JOURNAL BONE JOINT SURGERY INC
Abstract:	A new solid sorbent passive air sampler for ketones has a silicone membrane atop a diffusion cylindrical path length of 1.1 cm and diameter 1.3 cm above a pellet of Tenax TA coated with 10% (w/w) O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride. Vapors of known concentrations approximating their workplace permissible exposure limits of Occupational Safety and Health Administration-regulated ketones at a relative humidity (RH) of 3 +/- 1% were generated by a syringe pump connected to a dynamic air dilution system connected to an exposure chamber that allowed measurement of face velocities, temperatures, exposing vapor concentrations, and RHs. The O-oxime derivative was desorbed with hexane, and an aliquot injected for gas chromatographic analysis on a nonpolar capillary column by mass spectrometric or electron capture detection. The experimental passive sampler sampling rates in milliliters per minute at 25 degreesC were 4.07 +/- 0.49, cyclohexanone; 6.30 +/- 0.59, diethyl ketone; 6.31 +/- 0.31, ethyl n-butyl ketone; 3.78 +/- 0.25, methyl n-amyl ketone; 3.43 +/- 0.19, methyl n-butyl ketone; 6.48 +/- 0.64, methyl ethyl ketone; 4.37 +/- 0.43, methyl isopropyl ketone; and 4.57 +/- 0.17, methyl n-propyl ketone. These preliminary data show that sterically unhindered ketones can be sampled by the passive sampler as well as aldehydes.
Relation:	JOURNAL OF ORTHOPAEDIC RESEARCH 18(6):952-958
Appears in Collections:	[China Medical University Hospital] Jurnal articles

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