Oral doses of the organophosphorus pesticides acephate, dicrotophos, fensulfothion, fonofos, malathion, and parathion were administered to mallard ducklings (Anas platyrhynchos), and brain and plasma cholinesterase (ChE) activities were determined for up to 17 d after dosing. In vivo recovery of brain ChE activity to within 2 standard deviations of the mean activity of undosed birds occurred wi...

Cholinesterase (ChE) enzyme activity measurements are widely applied in aquatic organisms for water quality monitoring, especially for pesticide contamination in agricultural watersheds. These biomarkers are amenable to measurement in a variety of species, and are therefore useful for examining effects in model organisms relevant to the ecosystem of interest. However, extensive variation in ChE...

Vogliamo subito precisare che il problema di dimostrare la primalità di un intero è cosa diversa da quella di ricercarne gli eventuali fattori. Infatti esistono dei risultati che garantiscono la primalità di un numero mediante opportune condizioni equivalenti; il fatto che tali condizioni risultino non verificate consente quindi di concludere che tale numero è composto senza doverne esibire un ...

I investigated the transcriptional regulation of sigmaD synthesis. sigD is part of the fla/che operon, but the gene is also preceded by a promoter of its own. fla/che-dependent transcription is severely reduced in sigD-negative strains. Activity of the promoter in front of sigD is strictly temporally regulated. Deletion of this promoter results in a reduced and delayed activation of transcripti...

This study compared the ability of nine oximes (HI-6, HLö7, MMB-4, TMB-4, carboxime, ICD585, ICD692, ICD3805, and 2-PAM) to reactivate in vivo cholinesterase (ChE) in blood, brain, and peripheral tissues in guinea pigs intoxicated by one of four organophosphorus nerve agents. Two bis-pyridinium compounds without an oxime group, SAD128 and ICD4157, served as non-oxime controls. Animals were inje...

Inhibition of serum choline&erase (ChE) and erythrocyte acetylcholinesterase by diisopropylphosphorofluoridate and amiton did not follow first order kinetics. Curving of the rate plots was concave upward and varied greatly. An equation was derived on the assumption that curving reflected inhibition of a multiple enzyme system. The curves obtained with partially purified horse ChE were then reso...

The purpose of the study was to compare the plasma cholinesterase (ChE) activities of 100 greenhouse workers and 43 fruitgrowers engaged in spraying insecticides with those of 113 slaughtermen who served as controls. The ChE activity in the greenhouse workers and fruitgrowers was not significantly lower than in the controls. Nevertheless the ChE activity of greenhouse workers declined with incr...

Abstract: Firstly, we construct kernels for integral relations among solutions of the confluent Heun equation (CHE). Additional kernels are systematically generated by applying substitutions of variables. Secondly, we establish integral relations between known solutions of the CHE that are power series and solutions that are series of special functions. Thirdly, by using one of the integral rel...

Quelli che s'innamoran di pratica sanza scientia son come 'l nocchiere ch'entra in navilio sanza timone o bussola, che mai ha certezza dove si vada.

INTRODUCTION A national health account (NHA) provides a systematic approach to mapping the flow of health sector funds within a specified health system over a defined time period. This article attempts to present a profile of health system financing in Dubai, United Arab Emirates using data from NHAs, and to compare the functional structures of financing schemes in Dubai with schemes in Qatar a...