Novidades taxonômicas em Croton sect. Argyroglossum Baill. e C. sect. Lasiogyne Klotzsch (Crotonoideae-Euphorbiaceae)

Antiproliferative Activity of Flavonoids from Croton sphaerogynus Baill. (Euphorbiaceae)

Croton sphaerogynus is a shrub from the Atlantic Rain Forest in southeastern Brazil. A lyophilized crude EtOH extract from leaves of C. sphaerogynus, obtained by maceration at room temperature (seven days), was suspended in methanol and partitioned with hexane. The purified MeOH phase was fractionated over Sephadex LH-20 yielding five fractions (F1-F5) containing flavonoids, as characterized by...

New α-Glucosidase inhibitors from Croton bonplandianum Croton bonplandianum Baill (Euphorbiaceae)

Purpose: To isolate and evaluate α-glucosidase inhibitors from dichloromethane extract of Croton bonplandianum Baill as probable remedy for management of diabetes. Methods: Activity-guided isolation of constituents from dichloromethane extract was carried out. Fractionation of dichloromethane extract by column chromatography on silica gel and Sephadex LH 20 using different mobile phase systems ...

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Four Newly Recorded Amanita Species in Korea: Amanita sect. Amanita and sect. Vaginatae

We collected nearly 70 specimens of Amanita species during a diversity study of Korean mushrooms conducted in 2012. In this study, we primarily investigated 23 Amanita specimens belonging to sections Amanita and Vaginatae. Based on sequence data of the internal transcribed spacers and partial large subunit of ribosomal RNA and morphological characteristics, we identified the following 15 phylog...

SECT ION I Introduction: RNA viruses

Viruses that infect the central nervous system may cause acute, chronic, or latent infections. In some cases, the diseases manifested are attributable to viral damage of neurons or supporting parenchymal tissues; in other cases, to immune attack on virally infected cells. They can be spread by excretion, by respiratory droplets or fomites, or, alternatively, by bites of insects or animals. Thes...