Type classes are an immensely popular andproductive feature of Haskell. They have since been adoptedin, and adapted to, numerous other languages, including the-orem provers. We show that type classes have a natural andefficient representation in .NET that paves the way for theextension of F#, C# and other .NET languages with typeclasses. Our encoding is type preserving a...

To the Editor: In a recent paper by Hu et al. [1], a one-locus, three-allele system is proposed for the three forms ofhuman oculocutaneous albinism. In table 3 of their report, tyrosinase-positive (ty-pos) and tyrosinase-negative (ty-neg) albinism are shown to be, respectively, the heterozygous and homozygous states of the t allele. Previous work by others, as well as their own data, would seem...

This study compared the shear bond strength (SBS) to enamel of five self-etching primer/adhesive systems and one total-etch, one-bottle adhesive system. Sixty freshly extracted bovine incisors were mounted, polished to 600-grit and randomly assigned to six groups (n=10): Adper Prompt Self-Etch (AD), OptiBond Solo Plus Self-Etch (OP), AdheSE (AS), Tyrian (TY) and Clearfil SE Bond (SE) as self-et...

We have determined the nucleotide sequence of a complete yeast Ty element (Ty-pY109) which is located near a tRNA(Lys1) gene. The element is 5912 bp in length; the internal domain is flanked by two identical delta sequences of 331 bp. Ty-pY109 contains two large open reading frames (ORFs) which overlap by 38 bp; the putative proteins consist of 440 and 1328 amino acid residues, respectively. Th...

1 Department o f Animal Nutr i t ion, Universi ty of Veter inary and Animal Sc iences, Lahore, 2 Department o f Ther iogeno logy, Facul ty o f Veter inary Sciences, Bahauddin Zakar iya Univers i ty, Mul tan, Pakis tan 3 Department o f Patho logy, Arid Agr icul ture Univers i ty, Rawalp indi , Pakis tan 4 Department o f Basic Sciences, Sub campus Jhang, Univers i ty o f Veter inary and Animal Sc...

T h e present study was carr ied out to invest igate differences in the immuno¬ antigenici ty of 8 P. brasiliensis isolates f r o m 3 endemic areas (Botucatu : Pb 1, 2 and 3; S ã o Pau lo : P b 18, 192 and 265; Venezuela : P b 9 and 7 3 ) . T h e antigenic react ivi ty of each isolate in the indirect fluorescent test ( I I ) and in the immunodiffusion test ( I D ) w a s studied using a panel of...

A reversed-phase dispersive liquid-liquid microextraction (RP-DLLME) method coupled to HPLC was developed for the extraction of hydroxytyrosol (HTy) and tyrosol (Ty) from virgin olive oil. In this first application of the RP-DLLME method to non-polar samples, the phenolic compounds were directly extracted into an aqueous micro-drop, which could be injected into a chromatography column without a...