Frontal polymerization approach reduces energy use significantly

Engineering two organic molecules for better compatibility boosts the conversion efficiency of polymer solar cells to 14.2%

Magnetic property enables easy separation of sorption medium

Iron from hemoglobin initiates radical reaction

Material’s features attributed to bonds that readily break and re-form

Extracytoplasmic sugar decoration of glycopolymer components of the bacterial cell wall contributes to their structural diversity. Typically, the molecular mechanism that underpins such a decoration process involves a three-component glycosylation system (TGS) represented by an undecaprenyl-phosphate (Und-P) sugar-activating glycosyltransferase (Und-P GT), a flippase, and a polytopic glycosyltransferase (PolM GT) dedicated to attaching sugar residues to a specific glycopolymer. Here, using bioinformatic analyses, CRISPR-assisted recombineering, structural analysis of cell wall–associated polysaccharides (CWPS) through MALDI-TOF MS and methylation analysis, we report on three such systems in the bacterium Lactococcus lactis. On the basis of sequence similarities, we first identified three gene pairs, csdAB, csdCD, and csdEF, each encoding an Und-P GT and a PolM GT, as potential TGS component candidates. Our experimental results show that csdAB and csdCD are involved in Glc side-chain addition on the CWPS components rhamnan and polysaccharide pellicle (PSP), respectively, whereas csdEF plays a role in galactosylation of lipoteichoic acid (LTA). We also identified a potential flippase encoded in the L. lactis genome (llnz_02975, cflA) and confirmed that it participates in the glycosylation of the three cell wall glycopolymers rhamnan, PSP, and LTA, thus indicating that its function is shared by the three TGSs. Finally, we observed that glucosylation of both rhamnan and PSP can increase resistance to bacteriophage predation and that LTA galactosylation alters L. lactis resistance to bacteriocin.

ವಿಶಾಖಪಟ್ಟಣದಲ್ಲಿ ಗುರುವಾರದ ಅನಿಲ ಸೋರಿಕೆ ಘಟನೆಯು ಕನಿಷ್ಠ ಎಂಟು ಮಂದಿಯ ಪ್ರಾಣ ತೆಗೆದಿದೆ. ನೂರಾರು ಮಂದಿ ಅಸ್ವಸ್ಥರಾಗಿದ್ದಾರೆ. ಈ ಘಟನೆಯ ಮೂಲ ಇರುವುದು ಎಲ್.ಜಿ. ಪಾಲಿಮರ್ಸ್ ಒಡೆತನದ ಕಾರ್ಖಾನೆಯಲ್ಲಿ. ಪ್ಲಾಸ್ಟಿಕ್ ರಿಸಿನ್ ಮತ್ತು ಸಿಂಥೆಟಿಕ್ ಫೈಬರ್ ಉತ್ಪಾದನೆ ಮಾಡುವ ಕೈಗಾರಿಕೆಯ ಒಂದು ಭಾಗವಷ್ಟೇ ಈ ಘಟಕ. ಇನ್ನು ಇದರ ಮಾಲೀಕತ್ವ ಯಾರದು ಅಂತ ನೋಡಿದರೆ, ದಕ್ಷಿಣ ಕೊರಿಯಾದ

On May 7, 11 persons were killed while over 1,000 were hospitalised due to gas leakage from LG Polymers chemical plant at RR Venkatapuram in Andhra Pradesh's Visakhapatnam.