A gas chromatographic (GC) method was developed for the determination of sucrose monoesters of fatty acids (mono-SuE) and sucrose acetate isobutyrate (SAIB) in food additive premixes. Mono-SuE and SAIB fractions were prepared by column chromatography with either a C8 or a silica gel solid-phase extraction column. The mono-SuE fraction was acetylated and applied to a wide-bore GC column (0.53 mm...

This paper presents a formulation of the multiple user class, variable demand, probit stochastic user equilibrium model (SUE). Sufficient conditions are stated for differentiability of the equilibrium flows of this model. This justifies the derivation of sensitivity expressions for the equilibrium flows. This paper then considers the network design problem (NDP), assuming that users’ responses ...

The poverty thresholds used m the Current Populatmn Survey (CPS) of the Bureau of the Census vary with fanuly sue, cornposItIon, and residence The mcome definltlon mcludes all money mcome, unearned as well as earned, of all family members As a consequence, nulhons of men with low earnqs-below the poverty level for the average nonfarm fanuly of four ($4,275 m 1972), for example-are members of no...

Bounding the inefficiency of selfish routing has become an emerging research subject. A central result obtained in the literature is that the inefficiency of deterministic User Equilibrium (UE) is bounded and the bound is independent of network topology. This paper makes a contribution to the literature by bounding the inefficiency of the logit-based Stochastic User Equilibrium (SUE). In a stoc...

Abstract—Stochastic User Equilibrium (SUE) model is a widely used traffic assignment model in transportation planning, which is regarded more advanced than Deterministic User Equilibrium (DUE) model. However, a problem exists that the performance of the SUE model depends on its error term parameter. The objective of this paper is to propose a systematic method of determining the appropriate err...

To investigate the varietal difference in sulfur use efficiency (SUE) and drought stress tolerance, Brassica napus 'Mosa' and 'Saturnin' were exposed to polyethylene glycol (PEG)-induced drought stress for 72 h. Direct quantification of S uptake, de novo synthesis of amino acids and proteins was performed by tracing (34)S. The responses of photosynthetic activity in relation to SUE were also ex...

The first paper, entitled Françoise, a fifteen year follow-up, from Jean Rondal and his colleagues M. Elbouz, M. Ylieff, and L. Docquier, at the University of Liège in Belgium presents an individual case study that describes in detail the changes in language and memory function of Françoise, a 47 year old lady with Down syndrome. Françoise will already be well known to many in this field as she...