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Оценка конкурентоспособности проектируемых конструкций

Учебно - методическое пособие предназначено для выполнения экономической части дипломного проекта и курсовой работы студентами специальности 16.02 - "Автомобилестроение и тракторостроение". Оно включает общие положения по экономической оценке технических решений, методику определения затрат на стадии изготовления машин, методику определения затрат на стадии эксплуатации машин, нормативные характеристики тракторной и автомобильной техники, перечень основных ГОСТов, нормалий, методику опреде...

Spectroscopy of interchromophoric interactions in self-organized porphyrin and chlorin complexes

Spectral-luminescent properties of multimolecular complexes (triads and pentads, complexation constants range from 5∙10⁶ to 5∙10⁷ M⁻¹) formed by two-fold coordination of dipyridyl and tetra-pyridyl substituted porphyrin or related molecules with Zn-porphyrin and Zn-chlorin dimers having various spacers between macrocycles (-CH₂-CH₂- or phenyl ring) have been studied in methylcyclohexane solutions in a temperature range from 140 to 360 K. The red shift of Zn-dimer electronic Q- and B-bands (∆ν...

Energy transfer in ethane-bisporphyrins studied by fluorescence line narrowing and spectral hole burning

The quasi-line fluorescence excitation spectrum of 1,2-bis (2,3,7,8,12,13,17,18-octaethyl-21H,23 H-porphino) ethane at 4.8 K consists of two subbands with the splitting mean value of 51cm⁻¹, that are ascribed to the donor and the acceptor half of the homodimer. The donor's fluorescence is quenched by an efficient energy transfer to the acceptor. The energy transfer rate of 10¹¹ s⁻¹, determined by spectral hole burning, has been compared with the calculated value and a conclusion of nonconsist...