of perspectives. An evolutionary approach can be used to understand what conditions favor the expression of aggressive behavior. The aim of a mechanistic analysis is to understand the genetic and biochemical basis of aggression. Finally, since aggression is often viewed as disruptive to human society, techniques for predicting and influencing the aggressive potential of both normal and patholog...

An interface of our microspectrofluorometer with an image processing system performs microspectrofluorometric measurements in living cells by digital image processing. Fluorescence spectroscopic parameters can be measured by digital image processing directly from microscopic images of cells, and are automatically normalized for pathlength and accessible volume. Thus, an accurate cytoplasmic "ma...

Most of the NIR spectrometers available are not suited for on line measurements in slaughterhouses. The aim of the study was to test the ability of a device dedicated to industrial measurement (NitFom, Frontmatec) for prediction of drip loss and ultimate pH. A calibration model fitting was satisfactory (drip loss, R2=0.59 and pHu, R2=0.70) and the prediction accuracy levels for drip loss were s...

background in contemporary practice, acute mesenteric ischemia (ami) remains a serious cause of morbidity and mortality in abdominal emergencies. objectives we report the measurement of peritoneal fluid potassium and ph on a small series of rats that developed extensive ami following the surgical ligation of superior mesenteric vessels and compare the results with control groups. materials and ...

Since conventional sampling and laboratory soil analysis do not provide a cost effective capability to obtain georeferenced measurements with adequate frequency, different onthe-go sensing techniques have been attempted. One such recently commercialized sensing system combines mapping of soil electrical conductivity and pH. The concept of direct measurement of soil pH has allowed for a substant...

RAPOPORT, STANLEY I., AND WADE H. MARSHALL. Measurement of cortical pH in spreading cortical depression. Am. J. Physiol. 206(5) : I 177-1180. 1g64.-The pH of the rabbit cortex was measured during the course of spreading cortical depression. Spreading cortical depression was elicited by chemical (group I) and by electrical (group II) means. Cortical d-c potential changes were recorded separately...

A new automatic apparatus based on the differential measurement of pH between two solutions has been developed. Two 25-microL (internal volume) glass capillary electrodes are used to measure the results of automated (under microcomputer control) chemical reactions that lead to the liberation or the uptake of hydrogen ions. The sensitivity of the differential pH measurements is better than +/- 0...

In 1923, Sharlit and Seheer (1) published a paper entitled "The Hydrogen-Ion Concentration of the Healthy, Intact Skin," in which they discussed in detail the meaning of hydrogen-ion concentration and pH, and showed how the entire concept of hydrogen-ion concentration is a part of the general theory of electrolytic dissociation. They stated that the only method available at that time for measur...