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Perovskite (PVSK) photovoltaics have been a promising field in the exploitation of renewable energy due to the fascinating performances of PVSK materials and devices. Although the efficiency is gradually approaching that of traditional solar cells, the stability is still a challenge. Hence, tomato lycopene, a botanic antioxidant, is introduced as a modification layer on the PVSK absorber layer to...
For application in the magnetic field of Gouy magnetic balance, a dc-current source with ±200 V/50 A for magnetic system has been developed. Through designing a first-order negative feedback system with no static error, the stability of this customized constant current source at 42.86 A approached to 1.59×10−5/30 min which at present was satisfied with the requirement of the magnetic system.
The issues of antivenom stability and distribution, and the training of health staff in the correct use of antivenoms in Latin America were discussed in a workshop held at Instituto Clodomiro Picado, Costa Rica, in September 16–19, 2008, under the auspices of the program CYTED. Participants from public antivenom production laboratories of the region, together with representatives of the Ministries...
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