リンク集 RSS/ATOM 記事

Hard line on conduct could prevent bigger lapses but may prompt claims of disguised cost savings

Hanoi could become a victim of its own success after building up a huge trade surplus with the US

タイトル: Efficient Derivatization of a Thienobenzobisthiazole-Based π-Conjugated Polymer Through Late-Stage Functionalization Towards High-Efficiency Organic Photovoltaic Cells著者: Iwasaki, Hiroto; Yamanaka, Kodai; Sato, Yuki; Mikie, Tsubasa; Saito, Masahiko; Ohkita, Hideo; Osaka, Itaru抄録: Derivatization is essential for optimizing organic material properties. However, because functional groups are often introduced at an early stage of the synthesis, similar intermediates have to be repeatedly synthesized to produce derivatives, which amounts to a daunting and time-consuming task. Using thienobenzobisthiazole (TBTz) as a building unit of donor polymers for organic photovoltaics (OPVs), we demonstrate an efficient derivatization of a TBTz-based π-conjugated polymer by late-stage functionalization. In the developed synthetic route, functional groups are introduced at the last step of monomer synthesis, enabling us to easily synthesize several derivatives from a common inter ...

タイトル: Behavior and flow of microplastics during sludge treatment in Japan著者: Liu, Sai; Oshita, Kazuyuki; Guo, Wenjing; Takaoka, Masaki抄録: Microplastic (MP) pollution is a growing public and scientific concern. In urban environments, wastewater treatment plants (WWTPs) are major sources of MPs. This study sampled sludge and separated water from each sludge treatment unit in two WWTPs in Osaka, Japan. Analyzing method for MPs in sewage sludge was optimized, ultrasonic pretreatment and double digestion were introduced into the analyzing method of MPs in sewage sludge, recovering test of standard MPs proved its high efficiency. Then MPs larger than 100 μm were extracted and analyzed, their size and type were recorded, the MP concentration was calculated, and the MP flow in the sludge treatment system was estimated. MPs were detected at every step of the sludge treatment process, and 13 types of MPs were identified. The MP concentration in sludge ranged from 81 ± 48 to 647 ...

Frozen assets and large capital exports should be go-to sources for funding a geopolitical transformation

Argentina veto warning sparks fears conservatives will be emboldened to ditch global deals on climate and tax

Parts of country left without power after one of war’s largest air assaults

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