The design and testing of a new microelectrode array, the NCTU (National Chiao Tung University) probe, was presented. Evaluation results showed it has good biocompatibility, high signal-to-noise ratio (SNR: the root mean square of background noise to the average peak-to-peak amplitude of spikes) during chronic neural recordings, and high reusability for electrolytic lesions. The probe was a fle...

The dorsal (DH) and ventral (VH) subregions of the hippocampus are involved in contextual fear conditioning. However, it is still unknown whether these two brain areas also play a role in defensive behavior induced by electrical stimulation of the dorsal periaqueductal gray (dPAG). In the present study, rats were implanted with electrodes into the dPAG to determine freezing and escape response ...

Sik.?I have received the enclosed letter from Mr. Hutchinson of Pusa in regard to the remarks on Electrolytic Chlorogen contained in the report of my paper on "The Selection of a Disinfectant" in the May issue of the Gazette. Whilst I am not entirely in agreement with Mr. Hutchinson in his estimation of costs based only 011 a phenol coefficient,? (Lysol, for instance, is extensively used by gyn...

SLUMMARY Both hemodynamic and electrocardiographic effects of Renografin-76 (diatrizoate meglumine) were studied in intact, anesthetized dogs. The left coronary artery in nine dogs was injected with equal amounts of Renografin-76, an equiosmolar dextrose solution (1690 mOsm/1) and a solution of the same electrolytic content (190 mEq/l sodium). Renografin and the dextrose solution produced signi...

Lesion of posterodorsal amygdala (PDA) has been known to produce hyperphagia and obesity in animal models. However, the influence of gender on food intake (FI), body weight (BW) and immunological parameters following PDA lesion is not yet known. The present work was carried out to study the effect of gender on the regulation of FI, BW and immunological parameters following lesions of PDA in alb...

The development of methods and apparatus for magnetic measurements capable of an accuracy of i per cent makes it necessary to consider factors which have heretofore been considered negligible. One of these factors, the temperature coefficient of magnetic permeability, is the subject of the present paper. Many workers have studied the effects of temperature on the magnetic permeability of iron a...

Considerable evidence suggests that, in instrumental conditioning, rats can encode both the specific action-outcome associations to which they are exposed and the degree to which an action is causal in producing its associated outcome. Three experiments assessed the involvement of the hippocampus in encoding these aspects of instrumental learning. In each study, rats with electrolytic lesions o...

National Office of Measures, Budapest, Hungaiy A new method for the absolute determination of electrolytic Conductivity based on direct current and potcntiomctrlc measurements is described. The unique design of the cell uses a removable center section whose length and crosS'Seciional area arc accurately known. Two pairs of matched Ag, AgCI electrodes are used in a four terminal mode of resistan...