Geophysical characterization, design and construction of the Teoloyucan Geophysical Test Site for archaeological and engineering applications, Central Mexico

Karwinskia humboldtiana is a poisonous plant that grows in semi desertic areas in north and central México. It produces several substances with different toxic effects. One of them designated T-514 damages severely the lung, kidney and liver, producing in the hepatoeyte large intracellular fat deposits and necrosis. Preliminary observations demonstrated that three is a decrease in the amount of peroxisomes in the hepatocytes of experimentally intoxicated rats and monkeys. To study the effect exerted by the T-514 on peroxisomes, a yeast model was selected, thus, three species: Saccha romices cerevisiae, Ilansenula polymorpha and Candida boidinii were used, because there is information concerning their peroxisome's morphology, enzyme content, biological behaviour under different culture conditions and biogenesis.

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Controlling the in vitro differentiation of embryonic stem cells for myocardial tissue engineering applications

Cell Biology International ◽

10.1042/cbi20090021 ◽

2009 ◽

Author(s):

Dong-Bo Ou ◽

Rui Chen ◽

Xiong-Tao Liu ◽

Jing-Jing Guo ◽

Hong-Tao Wang ◽

...

Keyword(s):

Tissue Engineering ◽

Stem Cells ◽

Embryonic Stem Cells ◽

Embryonic Stem ◽

Myocardial Tissue ◽

In Vitro Differentiation ◽

Engineering Applications ◽

Myocardial Tissue Engineering

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Magnitude Estimation and Cross-Modal Matching of Lingual Vibrotactile and Auditory Sensation

Journal of Speech Language and Hearing Research ◽

10.1044/jshr.3203.698 ◽

1989 ◽

Vol 32 (3) ◽

pp. 698-702 ◽

Cited By ~ 2

Author(s):

Daniel Harris ◽

Donald Fucci ◽

Linda Petrosino

Keyword(s):

Auditory Stimulus ◽

Magnitude Estimation ◽

Sensory Processing ◽

Test Site ◽

Systematic Investigation ◽

Thenar Eminence ◽

Stimulus Range ◽

Psychophysical Scaling ◽

Scaling Methods ◽

Response Biases

The present experiment was a preliminary attempt to use the psychophysical scaling methods of magnitude estimation and cross-modal matching to investigate suprathreshold judgments of lingual vibrotactile and auditory sensation magnitudes for 20 normal young adult subjects. A 250-Hz lingual vibrotactile stimulus and a 1000-Hz binaural auditory stimulus were employed. To obtain judgments for nonoral vibrotactile sensory magnitudes, the thenar eminence of the hand was also employed as a test site for 5 additional subjects. Eight stimulus intensities were presented during all experimental tasks. The results showed that the slopes of the log-log vibrotactile magnitude estimation functions decreased at higher stimulus intensity levels for both test sites. Auditory magnitude estimation functions were relatively constant throughout the stimulus range. Cross-modal matching functions for the two stimuli generally agreed with functions predicted from the magnitude estimation data, except when subjects adjusted vibration on the tongue to match auditory stimulus intensities. The results suggested that the methods of magnitude estimation and cross-modal matching may be useful for studying sensory processing in the speech production system. However, systematic investigation of response biases associated with vibrotactile-auditory psychophysical scaling tasks appears to be a prerequisite.

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