background: proteolytic enzymes have an important role in variety of physiological and pathological functions. they have been used in therapeutic and pharmaceutical applications. characterizations of extracellular proteases from various strains of s. marcescens indicate that most strains produce a very similar major metalloprotease. this metalloprotease (serrapeptidase, serrapeptase) is an impo...

in this research, the batch removal of toxic hexavalent chromium ions from wastewater and aqueous solution using dried (bd) sargassum sp. (brown marine algae) and activated carbon (ac) prepared from it was examined. biomass, ph and the initial concentration of cr(vi), adsorption models and kinetic studies were investigated. the experiment was performed in a batch system and theeffect of solutio...

background and objectives: psychrotrophic bacteria can produce enzymes at low temperatures; this provides a wide biotechnological potential, and offers numerous economical advantages over the use of mesophilic bacteria. in this study, extracellular protease production by psychrotrophic rheinheimera sp. (km459533) was optimized by the response surface methodology. materials and methods: the cult...

The genus Aptilotella Duda (Diptera: Sphaeroceridae: Limosininae) is redefined and revised. The type species, Aptilotella borgmeieri Duda is redescribed, and twenty-seven species are described as new: Aptilotella andersoni sp. n., A. angela sp. n., A. caerulea sp. n., A. corona sp. n., A. diffisa sp. n., A. ebenea sp. n., A. erinacea sp. n., A. gemmula sp. n., A. germana sp. n., A. gladia sp. n...

A species discovery and description pipeline to accelerate and improve taxonomy is outlined, relying on concise expert descriptions, combined with DNA sequencing, digital imaging, and automated wiki species page creation from the journal. One hundred and one new species of Trigonopterus Fauvel, 1862 are described to demonstrate the feasibility of this approach: Trigonopterus aeneipennis sp. n.,...

The cockroach genus Arenivaga is revised. Forty-eight Arenivaga species are recognized with nine previously known species and 39 described as new including the following: A. pagana sp. n., A. grandiscanyonensis sp. n., A. haringtoni sp. n., A. hopkinsorum sp. n., A. umbratilis sp. n., A. tenax sp. n., A. impensa sp. n., A. trypheros sp. n., A. darwini sp. n., A. nalepae sp. n., A. sequoia sp. n...