1,723,350 research outputs found
All 9439 gene sequences of Chlorella vulgaris UTEX259
No full textA fasta-formatted file of all 9439 nuclear gene sequences in Chlorella vulgaris UTEX259.<br
All 9439 coding sequences of Chlorella vulgaris UTEX259
No full textA fasta-formatted file of the coding sequences of all 9439 nuclear genes in Chlorella vulgaris UTEX259.<br
All 9439 protein sequences of Chlorella vulgaris UTEX259
No full textA fasta-formatted file of the peptide sequences of all 9439 nuclear genes in Chlorella vulgaris UTEX259.<br
Mosquito Larvicidal Constituents from Lantana Viburnoides SP Viburnoides Var Kisi (A. rich) Verdc (Verbenaceae).
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Lantana viburnoides sp viburnoides var kisi is used in Tanzania ethnobotanically to repel mosquitoes as well as in traditional medicine for stomach ache relief. Bioassay-guided fractionation and subtraction bioassays of the dichloromethane extract of the root barks were carried out in order to identify the bioactive components for controlling Anopheles gambiae s.s. mosquito larvae. Twenty late III or early IV instar larvae of An. gambiae s.s. were exposed to various concentrations of the plant extracts, fractions, blends and pure compounds, and were assayed in the laboratory by using the protocol of WHO 1996. Mean mortalities were compared using Dunnett's test (p < 0.05) and lethal concentration calculated by Lackfit Inversel of the SAS programme. The crude extract (LC50 = 7.70 ppm in 72 h) and fractions exhibited different level of mosquito larvicidal activity with subtraction of some fractions resulting in activity enhancement. The active fractions contained furanonaphthaquinones regio-isomers (LC50 = 5.48-5.70 ppm in 72 h) and the lantadene triterpenoid camaric acid (LC50 = 6.19 ppm in 72 h) as active principles while the lupane triterpenoid betulinic acid (LC50 < 10 ppm in 72 h) was obtained from the least active fraction. Crude extracts and some fractions had higher or comparable larvicidal activity to the pure compounds. These results demonstrate that L. viburnoides sp viburnoides var kisi extracts may serve as larvicides for managing various mosquito habitats even in their semi-purified form. The isolated compounds can be used as distinct markers in the active extracts or plant materials belonging to the genus Lantana
Two sides of the coin: A constitutional analysis on Republic Act 9439
No full textDetention of the underprivileged patients by hospitals due to their inability to pay their medical expenses gave rise to the enactment of Republic Act 9439, entitled An Act Prohibiting the Detention of Patients in Hospitals and Medical Clinics on Grounds of Non-payment of Hospital Bills or Medical Expenses. Republic Act 9439 was passed to respond to the prevailing conflict of interest between public and private hospitals and medical clinics and the patients. The right to property of hospitals is weighed alongside the rights of patients to life, liberty and health. Through research and analysis, the writers of this paper will answer this challenge on both parties and suggest ways on whose interest should be given preference
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Organocatalysis using Bifunctional Aminoboronic Acids – Application to the Asymmetric Aldol Reaction
Get PDFThe organocatalytic iminium activation strategy acting cooperatively with a Lewis acidic group has been applied to the development of a novel generation of proline-based aminoboronic acid catalysts.
Key steps for their synthesis included (-)-sparteine mediated asymmetric deprotonation of N-Boc-pyrrolidine, copper(I) catalysed borylation of alkylhalides and catalysed hydroboration of alkenes. The evaluation of the first proline-based aminoboronic acids is described in the context of organocatalysed aldol reactions between p-nitrobenzaldehyde and acetone. Enhanced reactivity and enantioselectivity observed in the presence of a boronate ester analogue of the catalyst resulted in further examination regarding the role of the esterification diol in these organocatalytic reactions. Notably, 11B NMR studies have been assessed, allowing the evaluation of different diols in terms of stability and Lewis acid tuning, and plausible identification of the catalytic species present.
The feasibility of the catalyst under optimised reaction conditions was demonstrated in the aldol reaction of different substrates. Extended mechanistic studies lead to the proposal of a catalytic cycle in which a highly organised transition state plays a key role for both the reactivity and enantioselectivity observed. Finally, strategies employed to further examine both reactivity and asymmetric induction of the free boronic acid catalyst are discussed, examing the carbon length chain between the secondary amine moiety and the boronic acid group of the catalyst
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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