High lead-tolerant mutant Bacillus tropicus AT31-1 from rhizosphere soil of Pu-erh and its remediation mechanism.

In this study, we successfully generated the mutant strain Bacillus tropicus AT31-1 from AT31 through atmospheric room-temperature plasma mutagenesis. This mutant strain AT31-1 demonstrated an impressive 48.6 % removal efficiency in 400 mg/L lead medium.

Effects of Five Different Withering Methods on the Composition and Quality of Congou Black Tea.

To explore the effects of different withering methods on the quality of Congou black tea, this study focused on five different withering methods: natural withering, warm-air withering, sun-natural combined withering, sun withering, and shaking withering. Gas chromatography‒mass spectrometry (GC‒MS), high-performance liquid chromatography (HPLC), and ion-exchange chromatography techniques were used to analyze the nonvolatile and volatile components and composition of the tea. The results revealed significant differences ( < 0.

Nutrient levels and prokaryotes affect viral communities in plateau lakes.

Viruses are the most abundant organisms in aquatic environments. Recent advances of viral metagenomic have greatly expanded our understanding of aquatic viral communities. However, little is known about the difference of viral communities and driving factors in freshwater lake.

Effect of fulvic acid induction on the physiology, metabolism, and lipid biosynthesis-related gene transcription of Monoraphidium sp. FXY-10.

Fulvic acid (FA) triggers lipid accumulation in Monoraphidium sp. FXY-10, which can produce biofuels. Therefore, the metabolism shift and gene expression changes influenced by fulvic acid should be investigated.

Production of biomass and lipids by the oleaginous microalgae Monoraphidium sp. QLY-1 through heterotrophic cultivation and photo-chemical modulator induction.

A two-step strategy comprising heterotrophic cultivation and photo-chemical modulator induction was developed to enhance biomass and lipid accumulation in the oleaginous Monoraphidium sp. QLY-1, which was isolated from Qilu Lake in Yunnan Plateau. The algae were first cultivated heterotrophically to achieve high biomass concentration (5.

Enhanced biomass production, lipid yield and sedimentation efficiency by iron ion.

Effects of Fe(3+) on the biomass production, lipid accumulation of Monoraphidium sp. FXY-10 were investigated. Further residual Fe(3+) in the culture medium on the sedimentation efficiency have been also studied.