29 research outputs found
Impact Factor: outdated artefact or stepping-stone to journal certification?
A review of Garfield's journal impact factor and its specific implementation
as the Thomson Reuters Impact Factor reveals several weaknesses in this
commonly-used indicator of journal standing. Key limitations include the
mismatch between citing and cited documents, the deceptive display of three
decimals that belies the real precision, and the absence of confidence
intervals. These are minor issues that are easily amended and should be
corrected, but more substantive improvements are needed. There are indications
that the scientific community seeks and needs better certification of journal
procedures to improve the quality of published science. Comprehensive
certification of editorial and review procedures could help ensure adequate
procedures to detect duplicate and fraudulent submissions.Comment: 25 pages, 12 figures, 6 table
Exposição a pesticidas e repercussão na saúde de agentes sanitaristas no Estado do Ceará, Brasil
Inaugural meeting of the Pan-American Society for Evolutionary Developmental Biology report: the importance of diversity in a multidisciplinary field
Thirty years of Biology & Philosophy: philosophy of which biology?
Which domains of biology do philosophers of biology primarily study? The fact that
philosophy of biology has been dominated by an interest for evolutionary biology is
widely admitted, but it has not been strictly demonstrated. Here I analyse the topics of
all the papers published in Biology & Philosophy, just as the journal celebrates its
thirtieth anniversary. I then compare the distribution of biological topics in Biology &
Philosophy with that of the scientific journal Proceedings of the National Academy of
Science of the USA, focusing on the recent period 2003-2015. This comparison
reveals a significant mismatch between the distributions of these topics. I examine
plausible explanations for that mismatch. Finally, I argue that many biological topics
underrepresented in philosophy of biology raise important philosophical issues and
should therefore play a more central role in future philosophy of biology
Gas chromatographic determination of cyprodinil, fludioxonil, pyrimethanil, and tebuconazole in grapes, must, and wine
A rapid and simple gas chromatographic method for determinating cyprodinil, fludioxonil, pyrimethanil, and tebuconazole in grapes, must, and wine is described. An on-line microextraction method was used with a one-step extraction-partition procedure. Nitrogen-phosphorus and mass spectrometric detectors were used, because of their low sensitivity and high selectivity. Because of high selectivity of detector, no cleanup was necessary and the extract was concentrated 5 times. Recoveries from fortified grapes, must, and wine ranged from 93 to 110%. Limits of determination were 0.05 mg/kg for cyprodinil and pyrimethanil and 0.10 mg/kg for fludioxonil and tebuconazole
Synergistic action of 50°C water and imazalil dip treatments to preserve quality of late-season ‘Marsh grapefruits’
Determination of Carbamate Insecticides in Apples, Pears and Lettuce by LC with UV detector
A simple and rapid method was developed for determination of 8 carbamate insecticides and 10 of their metabolites in apples, pears, and lettuce by liquid chromatography with UV diode array detector. With this method no derivatization is needed. Carbamates not belonging to the N-methylcarbamate class and metabolites without the N-methyl group can also be determined
Simplified multiresidue method for the determination of organophosphorus insecticides in olive oil
A simple and rapid method for the determination of 13 organophosphorus insecticides and their metabolites in olive oil by GC is described. The pesticide was extracted from oil with acetonitrile and no cleanup was needed. GC-nitrogen-phosphorus detection response factors of pesticides were affected by solvents and coextractive substances. Pesticides in hexane showed on average higher response factors. Standards were prepared in the residue-free oil extract solubilized in hexane to handle effects of matrix and solvent. The low amount of coextractive substances does not decrease the column efficiency, even after a few hundred analyses. Recovery at three fortification levels (ca. 0.1, 1.0 and 3.0 mg/kg) ranged from 74 to 118%, With coefficients of variation ranging from 1 to 16