Effect of Oxygen Retained on Beet Powder on the Stability of Betanine and Vulgaxanthine I

The effect of oxygen retained on beet powder on the stability of betanine and vulgaxanthine I was studied at 35°C as a function of a_w (“dry”-0.75). moisture content, added aluminium oxide powder and headspace gases (N₂, air). Limited degradation was observed under N₂ or air and a_w± 0.41. Deterioration was accelerated at a_w± 0.52 and the presence of added Al₂O₃. This was interpreted as a lack of liquid phase mobility which retarded the reaction up to ± 0.5 a_w. Above 0.5 a_w the transition in the mechanism was related to the concentration of the dissolved 0₂ in the liquid phase, which controlled the deterioration rate. The latter was strongly affected by the added Al₂O₃. In the presence of aluminium oxide, the very fast pigment oxidation suggested a catalytic reaction.     

Aging of Frozen Parts of Beef

Due to religious regulations, the beef imported into Israel is frozen soon after boning. In a search for a method for optimal aging of the beef after thawing and koshering, 8 different aging experiments were conducted, from 0-12 days. Cooking loss and myofibril fragmentation index were found to be more affected by the freezing preceding aging. Nonprotein nitrogen components were found to increase during optimum aging and then decrease. Sensory evaluation of tenderness, performed by multiple-paired comparisons, indicated a significant improvement in meat tenderness after 1 day of aging and further gradual improvement up to 7 days.     

Service parts logistics: a benchmark analysis

This paper summarizes the results of a benchmark study focusing on after-sales service logistics systems for technologically complex high-value products, i.e., in the computer industry. Current industrial practices and trends in service logistics operations are reported on. Specific data on costs, revenues, service measures, control policies, and distribution strategies were collected and used to define best practice performance. Analysis methodologies to support cross-sectional comparisons and causal factors are discussed.     

A METHOD FOR THE ANALYSIS OF THE STRUCTURE AND INTERNAL CONSISTENCY OF Q-SORT ARRAYS.

THE THEORETICAL ISSUES INVOLVED IN THE CONSTRUCTION AND INTERNAL CONSISTENCY OF Q SORTS ARE EXAMINED, TRADITIONAL METHODS OF ANALYSIS ARE CRITICIZED, AND A NEW TECHNIQUE IS PRESENTED WHICH IS APPLICABLE BOTH TO THE ANALYSIS OF SINGLE ARRAYS AND THE NORMATIVE STUDY OF RELEVANT POPULATIONS. THE PROPOSED TECHNIQUE IS THEN APPLIED TO EMPIRICALLY DERIVED DATA OBTAINED FROM A STRUCTURED SET OF Q ITEMS FOCUSED ON THE MEANING OF WORK. THE RELATIONS BETWEEN NORMATIVE AND IPSATIVE METHODOLOGY ARE CLARIFIED, AND SOURCES OF E SUBJECTIVITY ARE DEFINED AND REDUCED. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

STATISTICAL EVALUATION OF ARRHENIUS MODEL AND ITS APPLICABILITY IN PREDICTION OF FOOD QUALITY LOSSES

To minimize quality losses occurring during processing and storage and to predict shelf-life, quantitative kinetic models, expressing the functional relationship between composition and environmental factors on food quality, are required. The applicability of these models is based on the accuracy of the model and its parameters. In this paper, the calculation of the Arrhenius parameters and the accuracy of the derived model were compared, using three statistical methods, namely: linear least squares, nonlinear least squares and weighted nonlinear least squares. Results indicated that the traditional two-step linear method, was the least accurate and the derived energy of activation and the pre-exponential factor had the largest confidence interval. The latter was shown to have a profound effect on the precision of the calculated rate constant and the predicted shelf life. Based on previous reports that indexes of deterioration     

VALUE SYSTEM SIMILARITY: INVESTIGATION OF PATIENT-THERAPIST DYADS.

THIS STUDY STEMS FROM A PROPOSITION COMMON TO SEVERAL PSYCHOLOGICAL THEORIES: THERE IS MOVEMENT TOWARD SIMILARITY OR EQUILIBRIUM IN SOCIAL INTERACTION IN A DYAD. THE INTERACTION STUDIED CONCERNS VALUES IN THE THERAPIST-PATIENT DYAD. THE SAMPLE OF 38 THERAPISTS AND 44 PATIENTS WAS OBTAINED AT 2 PSYCHOANALYTIC TRAINING CENTERS. THE VALUES WERE MEASURED BY THE WAYS TO LIVE SCALE AND THE SVIB. THE RESULTS INDICATE THAT (1) THERAPISTS AND THEIR OWN PATIENTS WERE CLOSER IN VALUES THAN THOSE RANDOMLY PAIRED, (2) THERAPISTS DID NOT SHARE A HOMOGENEOUS VALUE SYSTEM, AND (3) THOSE PATIENTS RATED AS "MOST IMPROVED" BY THEIR THERAPISTS WERE CLOSER TO THEIR THERAPISTS IN VALUES THAN PATIENTS RATED "LEAST IMPROVED." THE PROPOSITION THAT VALUES MOVE TOWARD SIMILARITY IN ONGOING THERAPIST-PATIENT DYADS WAS NOT REFUTED. (19 REF.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

FLOW BEHAVIOUR OF CONCENTRATED ORANGE JUICE*

Abstract Orange concentrate, at the 60-65° Brix concentration level, is a non-Newtonian fluid with yield stress and time dependent behaviour. While recovery from low-rate shear is reversible, shear at high rate causes irreversible destruction of the viscous structure. Part of this effect is due to disintegration of pulp particles. Pulpless concentrate (serum) is also non-Newtonian, but yield stress and time dependent behaviour are present only when pectin concentration is high. Depectinized serum is Newtonian. The effect of temperature on flow properties of all three types of material was studied.