Improved Rainfastness and UV Resistance of Microbial Pesticides

2020 ◽  
pp. 152-161
Author(s):  
Caroline Woelfle-Gupta ◽  
Selvanathan Arumugam ◽  
Daniel Saucy ◽  
Bolatito Ajayi ◽  
Yujing Tan ◽  
...  
Keyword(s):  
Uv Resistance ◽  
Microbial Pesticides

scholarly journals Simple, green, ultrasound-assisted preparation of novel core–shell microcapsules from octyl methoxycinnamate and oligomeric proanthocyanidins for UV-stable sunscreen

RSC Advances ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 6374-6382
Author(s):  
Jie Song ◽  
Siqi Chen ◽  
Xu Zhao ◽  
Junbo Cheng ◽  
Yanli Ma ◽  
...  
Keyword(s):  
Inner Core ◽  
Outer Shell ◽  
Core Shell ◽  
Uv Resistance ◽  
Oligomeric Proanthocyanidins ◽  
Ultraviolet Absorbers ◽  
Ultrasound Assisted

With oligomeric proanthocyanidins (OPCs) as the outer shell and ultraviolet absorbers (OMC) as the inner core, OMC/OPCs composite microcapsules were prepared and characterized, and their UV resistance was studied.

scholarly journals The study of rod-shaped TiO2 composite material in the protection of stone cultural relics

2020 ◽  
Vol 9 (1) ◽  
pp. 359-365
Author(s):  
Hui Shu ◽  
Yujian Song ◽  
Qiang Liu ◽  
Maobin Luo
Keyword(s):  
Photocatalytic Performance ◽  
Acid Resistance ◽  
Uv Resistance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology ◽  
Excellent Photocatalytic Activity ◽  
Stone Culture ◽  
Weather Resistance ◽  
Cultural Relics

AbstractTiO2 has many advantages, such as UV resistance, thermal stability, and antibacterial; the attention toward TiO2 composite materials (TCMs) is rapidly increasing in the protection of stone culture relics. An innovative rod-shaped TCM was synthesized in this study. The structure and morphology of TCM were studied by X-ray diffraction and scanning electron microscopy. The acid resistance, weather resistance, hydrophilicity, and photocatalytic performance of TCM had been investigated. The experimental results indicated that TCM has good protection effects. The stone sample treated with TCM has stronger acid resistance and weather resistance, better hydrophilicity, and more excellent photocatalytic activity compared with the untreated stone. More importantly, the stone treated with TCM has better acid resistance and weather resistance than that treated with normal shaped TiO2 materials of the previous study. This work describes an effective way to protect stone cultural relics.

scholarly journals Mutations in the Escherichia coli UvrB ATPase motif compromise excision repair capacity

1989 ◽  
Vol 86 (17) ◽  
pp. 6577-6581 ◽  
Author(s):  
T W Seeley ◽  
L Grossman
Keyword(s):  
Escherichia Coli ◽  
Amino Acid ◽  
Excision Repair ◽  
Site Directed Mutagenesis ◽  
Sequence Motif ◽  
Amino Acid Side Chain ◽  
Uv Resistance ◽  
Wild Type ◽  
General Applicability ◽  
Repair Capacity

The Escherichia coli UvrB protein possesses an amino acid sequence motif common to many ATPases. The role of this motif in UvrB has been investigated by site-directed mutagenesis. Three UvrB mutants, with amino acid replacements at lysine-45, failed to confer UV resistance when tested in the UV-sensitive strain N364 (delta uvrB), while five other mutants constructed near this region of UvrB confer wild-type levels of UV resistance. Because even the conservative substitution of arginine for lysine-45 in UvrB results in failure to confer UV resistance, we believe we have identified an amino acid side chain in UvrB essential to nucleotide excision repair in E. coli. The properties of two purified mutant UvrB proteins, lysine-45 to alanine (K45A) and asparagine-51 to alanine (N51A), were analyzed in vitro. While the K45A mutant is fully defective in incision of UV-irradiated DNA, K45A is capable of interaction with UvrA in forming an ATP-dependent nucleoprotein complex. The K45A mutant, however, fails to activate the characteristic increase in ATPase activity observed with the wild-type UvrB in the presence of UvrA and DNA. From these results we conclude that there is a second nucleotide-dependent step in incision following initial complex formation, which is defective in the K45A mutant. This experimental approach may prove of general applicability in the study of function and mechanism of other ATPase motif proteins.

scholarly journals Enhanced efficiency and environmental stability of planar perovskite solar cells by suppressing photocatalytic decomposition

2017 ◽  
Vol 5 (33) ◽  
pp. 17368-17378 ◽  
Author(s):  
Peng Zhang ◽  
Jiang Wu ◽  
Yafei Wang ◽  
Hojjatollah Sarvari ◽  
Detao Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Environmental Stability ◽  
Photocatalytic Decomposition ◽  
Uv Resistance ◽  
Zno Film

Al-modified compact ZnO film-based planar PSCs exhibit high environmental stability and UV resistance.

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