Wilson et al. raisea number of issues that, according to their opinion, require explanation. They support their comment on their estimation of the accessibility of β-cyclodextrin (β-CD) sites of four polymers prepared by cross-linking β-CD with divinylsulfone (DVS) at four stoichiometries. In particular, they focus their attentions on our conclusion that for our system (i.e., seven polymers and...

MANY properties of proteins have been ascribed to adsorption phenomena and surface effects-grouped under the name of colloidal properties. Loeb [1922] and others have shown that many properties of proteins may be explained by the orthodox laws of chemical combination. In this paper an attempt is made to explain the effect of proteins on phthalein dyes as a chemical phenomenon. The interesting o...

The molecular masses of the UDP-glucuronyltransferases were determined by means of radiation-inactivation analysis of sodium dodecyl sulfate-treated lyophilized rat liver microsomal preparations using a calibrated 60Co source. Bilirubin glucuronidation with formation of bilirubin monoglucuronide is catalyzed by a 41,500-Da enzyme; conversion of bilirubin mono- to diglucuronide is catalyzed by a...

Abstract The drive for sustainable concrete production favors the use of high replacement levels supplementary cementitious materials (SCMs) in mix. SCMs such as fly ash and slag, however, although they improve sustainability well most durability properties, increases carbonation rate. Carbonation decreases pH pore solution, making steel reinforcement susceptible to corrosion. effect is, not co...

In this work, an automatic device to deliver titrant solution into a titration chamber with the ability to determine the dispensed volume of solution, with good precision independent of both elapsed time and flow rate, is proposed. A glass tube maintained at the vertical position was employed as a container for the titrant solution. Electronic devices were coupled to the glass tube in order to ...

THE photometric determination of urobilinogen was proposed by Terwen (i) and employs the reaction of native urobilinogen, plus that derived from ferrous hydroxide reduction of urobilin, with Ehrlich’s reagent, p-dimethylaminobenzaldehyde. This basic approach culminated in the “quantitative” and “semiquantitative” methods of Watson (2,3) with minor modifications by various authors (4). Efforts i...