Search results for "Poria"

Anti-phytopathogen terpenoid glycosides from the root bark of Chytranthus macrobotrys and Radlkofera calodendron

2020

Abstract Chytranthus macrobotrys and Radlkofera calodendron are two Sapindaceae characterized by a lack of phytochemical data. Both root barks from the two Sapindaceae species were processed by ethanol extraction followed by the isolation of their primary constituents by liquid chromatography. This process yielded four previously undescribed terpenoid glycosides together with eight known analogues. Extracts and isolated compounds from C. macrobotrys and R. calodendron were then screened for antimicrobial activity against fifteen phytopathogens. The biological screening also involved extracts and pure compounds from Blighia unijugata and Blighia welwitschii, two Sapindaceae previously studie…

Chemical Constituents and Pharmacological Properties ofPoria cocos

2011

Poria cocos (Polyporaceae) is a saprophytic fungus that grows in diverse species of Pinus. Its sclerotium, called fu-ling or hoelen, is used in traditional Chinese and Japanese medicine for its diuretic, sedative, and tonic effects. Various studies of this fungus have demonstrated its marked anti-inflammatory activity in different experimental models of acute and chronic inflammation. It is widely used as a constituent of many preparations in Asian medicine, but the number of research papers on its clinical properties is insufficient for establishing its efficacy and safety from a scientific point of view. In this review, we have compiled all the published data concerning the chemistry, pha…

Enduring the Autoimmune Aporia of Democratic Sovereignty

2021

The aim of this article is to read Rogues, in order to show that Derrida is neither a philosopher of democracy nor a critic of sovereignty , but rather a thinker of democratic sovereignty. Taking my cue from his Aporias, I argue that democratic sovereignty is aporetically in excess over itself, for it is based on articulating the path through the im-possible passage from the unconditional injunction of the ‘promise’ to the exigency of sovereignty. That is why it can neither be absorbed into the conditions of any existing democracy nor abstracted into any pure identity of sovereignty. Political trends today fail in enduring the aprioricity of aporia, as neoliberals valorize the posited condi…

La vita esiliata. Per una filosofia ermeneutica dell'esistenza a partire dal pensiero di Marcia Sa' Cavalcante Schuback

2017

Il saggio propone una lettura della filosofia dell'esilio, secondo le coordinate fenomenologico-ermeneutiche offerte dalla riflessione filosofica della pensatrice brasiliana M. Sa' Cavalcante Schuback, focalizzando la questione di una soggettività che fa continua esperienza di sé come una soggettività sospesa, fragile, in bilico fra alienazione di sé, estraneazione, interruzione, aporia, incondizionata apertura all'alterità, che le si dona gratuitamente.

Jean-Luc Nancy e L'iperbole del finito

2013

The Editor's introduction to this monographic number. Wih a survey on the various essays and the outline of Nancy's ontological perspective as a possible key to read the author's work as a whole.

Jean-Luc Nancy. L'iperbole del finito

2013

Chemical and spectroscopic characteristics of the wood of Vitis vinifera cv. Sangiovese affected by esca disease.

2009

Chemical and spectroscopic analyses ((13)C cross-polarization-magic angle spinning NMR and attenuated total reflection Fourier transform infrared spectroscopies) were carried out on the wood of Vitis vinifera cv. Sangiovese with brown-red discoloration and black streaks caused by esca disease. The analyses of the brown-red wood revealed the destruction of hemicelluloses and noncrystalline cellulose as well as modifications in the pectic and ligninic wood fractions. The pectic fraction consisted of carbohydrates associated with polyphenols. The lignin fraction exhibited only a few changes in the aromatic systems and a partial demethylation, and it appeared to be associated with condensed phe…

Caution on the assessment of intestinal parasitic load in studying parasite-mediated sexual selection: the case of Blackbirds coccidiosis.

2009

6 pages; International audience; The parasite-mediated sexual selection (PMSS) theory has led to an increasing number of experimental studies essentially focussed on blood parasites. Currently, more research is being carried out on intestinal parasites in relationship to this theory. Before testing the theory with gastrointestinal parasites, it is important: (i) to determine an optimal research methodology to obtain an accurate assessment of parasite burden and (ii) to have information about life-history traits of the parasite to interpret data appropriately. In this study, we present data on oocyst output of Isosporaturdi in the faeces of blackbirds (Turdus merula) that illustrate the impo…

Circadian variation in shedding of the oocysts of Isospora turdi (Apicomplexa) in blackbirds (Turdus merula): an adaptative trait against desiccation…

2009

5 pages; International audience; Many parasite species spend part of their life cycle in the external environment waiting for a new host. Emergence of parasites often occurs once a day, which may help to minimise mortality in an inhospitable environment and increase transition rates. Many intestinal parasites in birds are released in faeces only in the late afternoon. However, the adaptative significance of this pattern is unclear. One hypothesis is that a particular time of emergence may prevent parasite desiccation and therefore increase the parasite's life expectancy in the external environment. We tested this hypothesis experimentally using the blackbird (Turdus merula) infected with Is…

Cyclospora cayetanensis: first imported infections in Germany.

1997

Over the last decade increasing numbers of enteritis cases have been attributed to infection with a new coccidian species that was named Cyclospora cayetanensis in 1993. Diarrhea caused by this agent is clinically indistinguishable from cryptosporidiosis, isosporiasis and microsporidiosis, but Cyclospora infections are often very prolonged (up to 15 weeks) and may cause severe weight loss. Diagnosis of infection is important because, in contrast to diarrhea caused by Cryptosporidium and microsporidia, treatment with co-trimoxazole is effective. Here we report the cases of two female patients, aged 70 and 58 years old, respectively, who suffered from severe, prolonged diarrhea after a vacati…