نتایج جستجو برای: selectivity

تعداد نتایج: 45621  

2000
Jia Liu Masanori Higuchi Alec Marantz Nancy Kanwisher

Evidence from fMRI, ERPs, and intracranial recordings suggests the existence of face-specific mechanisms in the primate occipitotemporal cortex. The present study used a 64-channel MEG system to monitor neural activity while normal subjects viewed a sequence of grayscale photographs of a variety of unfamiliar faces and non-face stimuli. In fourteen out of fifteen subjects, face stimuli evoked a...

Journal: :Annual review of physiology 1969
J M Diamond E M Wright

INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......... 582 ALKALI-CATION SELECTIVITY IN NONLIVING SySTEMS..... . . . . . . . . . . . . . . .. 583 ALKALI-CATION SELECTIVITY IN BIOLOGICAL SYSTEMS. . . . . . . . . . . . . . . . . . .. 587 THE ORIGIN OF ALKALI-CATION EQUILIBRIUM SELECTIVITY .. .. . .. . .... . " 589 ANION SELECTIVITY. . . • . . . . . ....

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2004
a. hakan aktaş songül şen mustafa yılmazer ebru cubuk

low molecular weight organic acids are most predominant in apple juice among these components fumaric acid was not exceed more than 5 ppm. it was thought that the hplc is the best method of the determination of organic acids in the apple juice. in this study, chromatographic separation of organic acids of apple juice was obtained by preparing a sample and by applying them to acid phase for extr...

Journal: :journal of reproduction and infertility 0

background: the abortifacient claim of senna alata (s. alata) was scientifically validated recently with alkaloids speculated to be the bioactive agent. this speculation is yet to be substantiated or refuted by scientific evidence. the present study was aimed to investigate the pregnancy terminating effects of the alkaloids from s. alata leaves. methods: twenty four pregnant rats (143.99±1.21 g...

2009
Eli J. Finkel Paul W. Eastwick Eli Finkel

Men tend to be less selective than women when evaluating and pursuing potential romantic partners. The present experiment employed speed-dating procedures to test a novel explanation for this sex difference: The mere act of physically approaching a potential romantic partner (versus being approached), a behavior that is more characteristic of men than of women, increases one’s attraction to tha...

2004
Norberto M. Grzywacz David K. Merwine

Directional selectivity refers to a neuron’s ability to produce substantially different responses for stimulus motions of different direction. A directionally selective (DS) cell will fire many spikes in response to object motion in one direction (the preferred direction) while responding weakly, if at all, for motion in the opposite (null) direction. This directional “trigger feature” is often...

In this work, we have modified a synthesized Y-type zeolite (Si/Al = 2.5), with three different amines to investigate of the influence of adsorbent’s surface modification on CO2 selectivity over CH4. The pristine and amine-functionalized NaY zeolites were characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA), Fourier transform infrared (FT-IR), and N2 adsorption. The resu...

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