A new stachybotrin congener from a soil fungus Stachybotrys parvispora strain HS-FG-843

Spirocyclic Drimanes from the Marine Fungus Stachybotrys sp. Strain MF347

A novel spirocyclic drimane coupled by two drimane fragment building blocks 2 and a new drimane 1 were identified in mycelia and culture broth of Stachybotrys sp. MF347. Their structures were established by spectroscopic means. This is the first example of spirocyclic drimane coupled by a spirodihydrobenzofuranlactam unit and a spirodihydroisobenzofuran unit; and the connecting position being N...

A new endosulfan-degrading fungus, Mortierella species, isolated from a soil contaminated with organochlorine pesticides

Endosulfan is a broad-spectrum cyclodiene insecticide that has been used extensively for over 30 years on a variety of crops. It is a mixture of two stereoisomers, a and b endosulfan, in a ratio of 7 : 3. Its toxicity is extremely high against fish and aquatic invertebrates, and it has increasingly been implicated in mammalian gonadal toxicity, genotoxicity and neurotoxicity; however, endosulfa...

A glucuronoxylan-specific xylanase from a new Paenibacillus favisporus strain isolated from tropical soil of Brazil.

A new xylanolytic strain, Paenibacillus favisporus CC02-N2, was isolated from sugarcane plantation fields in Brazil. The strain had a xylan-degrading system with multiple enzymes, one of which, xylanase Xyn30A, was identified and characterized. The enzyme is a single-domain xylanase belonging to family 30 of the glycosyl hydrolases (GH30). Xyn30A shows high activity on glucuronoxylans, with a V...

f/sla from learner perspectives: a social activity or a cognitive process

in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...

A new strain of cucumber green mottle mosaic virus from iran