Researchers in China have developed a selective area epitaxy (SAE) approach to create nanopyramids of nitride semiconductor ‘white’ light-emitting diodes (LEDs) without using phosphors. The research involved various Chinese Academy of Sciences institutes – Institute of Semiconductors, Institute of Mechanics, and Suzhou Institute of Nano-tech and Nano-bionics – and Tsinghua University. The prospect of using nanopyramids for white light emission was raised earlier this year by Taiwan researchers who produced green, olivine and amber LEDs.
The marine actinomycete-derived Caerulomycin A (CRM A) was currently under the development as an immunosuppressive agent. Structurally, CRM A bears a unique 2,2'-bipyridine core and an unusual oxime functionality, the biosynthesis of which is rarely found in microbial secondary metabolites. Now, scientists from South China Sea Institute of Oceanology revealed that a flavin-dependent, two-component monooxygenase CrmH catalyzed the oxime formation in CRM A biosynthesis.
Dr. LIU Jun, Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences, and his team reported two large burrows from the Naobaogou Formation of Tumd Right Banner, Nei Mongol (Inner Mongolia), China. It marks the first pre-Cenozoic tetrapod burrow from China, and one of the earliest records of tetrapod burrows in the world.
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