Spiral channel patterns were designed to create a 3 x 3 array of pressure-sensor pads, which were wrapped around a standard neuroendoscope operating sheath. Pressure readings from the compressed sensor array were translated into a color-coded graphic user interface.
Calibration experiments were conducted, and the sensor was evaluated through cortical compression tests on explanted ovine brain.
Results. The sensing https://www.selleckchem.com/products/jnk-in-8.html endoscope operating sheath was successfully calibrated to detect and display pressures within a range consistent with normal and tissue-threatening compressions.
Conclusions. Force-feedback mechanisms for the neuroendoscopist are critically lacking with contemporary endoscopes. The authors designed a pressure-sensing skin technology for improved pressure feedback during endoscopy as a means for minimizing collateral tissue damage during endoscopy.”
“Introduction: Green, black and pu-erh teas are known to have strong antiradical properties in comparison to other plant raw materials. In
this study fifteen different teas belonging to three types, green, black, and pu-erh tea (five of each kind), were investigated for their antiradical properties. Antiradical activity of extracts and raw materials was measured using DPPH and ABTS(center dot+) radicals.
Material/Methods: The antiradical potential of teas was measured using DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS(center dot+) (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt). The TAU(515) and TAU(734) (antiradical activity units) were defined with PX-478 the tests of DPPH and ABTS(center dot+), respectively, and the number of units was calculated per mg of extracts (TAU(515/mg) and TAU(734/mg)) and g of raw materials (TAU(515/g) and TAU(734/g)).
Results/Discussion: When the extracts were investigated, the highest number of antiradical units (TAU(515/mg); TAU(734/mg)) was found per mg of ethyl acetate extract obtained from green tea leaves assayed with DPPH and ABTS(center dot+): 57.7+/-0.8; 106+/-2.0, units respectively. When the number of antiradical
units TAU(515/g) was calculated per 3-MA mw g of raw material, the highest antiradical potential (7601+/-92) was observed for green tea leaves. The greatest TAU(734/g) value (14 303+/-354) was also calculated for green tea leaves. The lowest value of antiradical activity units TAU(515/g) (684+/-30) and TAU(734/g) (1870+/-180) was calculated for pu-erh tea leaves. A high positive correlation was found between the antiradical activity of the raw materials and the content of phenolic compounds in these raw materials.”
“Condensations of aromatic carbo- and heterocyclic ketones and aldehydes in methanol gave new chalcones containing carbazole fragments, 1,3-diaryl(9-R-9H-carbazol-3-yl)prop-2-en-1-ones. Some of the synthesized chalcones reacted with guanidine sulfate to produce 2-amino-4,6-diarylpyrimidines that are promising materials for the design of light emitting diodes.