Four examples of para-nitro substituted 2-(arylimino)pyridine-nickel(II) bromide complexes general formula, [2-{(2,6-R-4-NO2C6H2)N=CMe}C5H4N]NiBr2, but differentiable by the steric/electronic properties displayed ortho-groups [R = i-Pr (Ni1), Et (Ni2), CHPh2 (Ni3), CH(4-FPh)2 (Ni4)], have been prepared in good yield. For comparative purposes, meta-nitro complex, [2-{(2,6-i-Pr2-3-NO2-4-(4-FPh)2C...

A convenient and general method for the synthesis in 26-73% yields of a new series of 7-alkyl(aryl/heteroaryl)-2-amino-5-trifluoromethyl-1,8-naphthyridines from direct cyclocondensation reactions of 4-alkoxy-1,1,1-trifluoroalk-3-en-2-ones [CF₃C(O)CH=C(R¹)OR, where R¹ = H, Me, Ph, 4-MePh, 4-OMePh, 4-FPh, 4-BrPh, 4-NO₂Ph, 2-furyl, 2-thienyl and R = Me, Et] with 2,6-diaminopyridine (2,6-DAP), unde...

A celebrated contribution of Bellantoni and Cook was a function algebra to capture FPTIME. This algebra uses recursion on notation. Later, Oitavem showed that including primitive recursion, an algebra is obtained which captures FPSPACE. The main results of this paper concern variants of the latter algebra. First, we show that iteration can replace primitive recursion. Then, we consider the resu...

INTRODUCTION Most low-income countries lack complete and accurate vital registration systems. As a result, measures of under-five mortality rates rely mostly on household surveys. In collaboration with partners in Ethiopia, Ghana, Malawi, and Mali, we assessed the completeness and accuracy of reporting of births and deaths by community-based health workers, and the accuracy of annualized under-...

Languages supporting polymorphism typically have ad-hoc restrictions on where polymorphic types may occur. Supporting “firstclass” polymorphism, by lifting those restrictions, is obviously desirable, but it is hard to achieve this without sacrificing type inference. We present a new type system for higher-rank and impredicative polymorphism that improves on earlier proposals: it is an extension...

The production of fish protein hydrolysate from underutilized species is attracting the industrial interest for increasing rich values. central composite design was used to optimize degree enzymatic hydrolysis freeze-dried (FPH) by application commercial Alcalase on recovery mixed small protein. effects time, temperature, pH and enzyme concentration (DH) five strains as Rastrelliger brachysoma ...

The fishing industry is often targeted as a producer of organic streams with low economic value. Biotechnological approaches can play crucial role in transforming and adding value to these for their further use upcycle. In this study, Atlantic codfish ( Gadus morhua ) frames, were subjected Alcalase hydrolysis, whose optimal conditions first fine-tuned established follows: 56.8 °C, pH 8.35, [Al...

The nature of technology is changing rapidly; likewise, the nature of viral threats to the data dependent upon the technology is evolving. Thus, the technologies we rely upon to provide protection from these threats must adapt. In the last twelve months, several anti-virus software vendors have announced exciting new technologies which claim to provide “faster, better, cheaper” response to comp...