The use of various buffers in the preparation of human lymphocytes for SEM observation

A study is presented of various buffers utilized in the preparation of human lymphocytes for scanning electron microscopy. Of nineteen different buffers tested, Hanks' balanced salt solution +0·04 mol sucrose appeared most adequate for satisfactory preservation of lymphocyte surface architecture.     

Development of directional responses to sounds in the rat (Rattus norvegicus).

Exp I examined the tendency of 48 Sprague-Dawley rat pups to approach auditory stimulation. Tests were conducted in a circular maze with a central start area and 8 response areas at the periphery. Stimuli were played back over a loudspeaker behind 1 of 8 response areas. Signals included species calls at high and low intensities. Ss showed a tendency to approach the low-intensity playback of a species "social" vocalization but did not approach the other stimuli. Exp II investigated the importance of binaural cues for localization. 24 pups were tested with 1 or both ears blocked or neither ear blocked. Only the binaurally blocked and normal controls approached the sound source at above chance levels. The failure of Ss in the monaural group to approach the sound probably resulted from a disruption of binaural cues. The ability of Ss to localize sounds and process binaural cues is discussed in relation to the onset of hearing and in terms of physiological responses that are present early in ontogeny. (76 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Die Bestandteile der Lebensmittel und deren Bestimmung

Ohne Zusammenfassung     

Die elektrische Leitfähigkeit metallkeramischer Werkstoffe der Systeme ZrO2-Mo und Al2O3-Fe zwischen 20 und 1700°C

Berechnung der elektrischen Leitfähigkeit metallkeramischer Werkstoffe. Erklärung der sprunghaften Leitfähigkeitsänderung mit einem Polyedermodell. Messung der elektrischen Leitfähigkeit an gesinterten Metallkeramiken aus elektronenleitendem Zirkonoxid und Molybdän, stabilisiertem, ionenleitendem Zirkonoxid und Molybdän sowie aus Aluminiumoxid und Eisen. Einfluß der Ausgangskorngröße der oxidischen Komponente auf die elektrische Leitfähigkeit.     

Assessing Human Impact of Organizational Crises: Reliability and Validity of the Triage Assessment Scale for Organizations (TAS:O)

The present study evaluated the reliability and validity of the Triage Assessment Survey: Organizations (TAS:O), a 27-item, 5-point, Likert summated rating scale. One hundred and seventeen participants responded to the TAS:O after reading mild, moderate, marked and severe organizational crisis scenarios. The overall Cronbach's alpha and split-half reliability were both .93. Confirmatory factor analysis revealed three factors, supporting the hypothesis that the TAS:O is comprised of three distinct factors (i.e., Affect, Behavior, and Cognition). An analysis of variance provided evidence that the TAS:O has the capacity to distinguish among mild, moderate, marked, and severe crises. Because this research is the first to evaluate the TAS:O, further studies are needed to strengthen confidence in the psychometric properties of this scale.