The geomagnetic field simulator for ground-based testing of nanosatellite orientation systems

В статье приводится обзор существующих отечественных и зарубежных стендов дляполунатурного моделирования систем ориентации наноспутников. Проведен их сравнительный анализ по основным техническим характеристикам. Определены общие тенденции в структуре стендов. Приведены результаты проектирования имитатора геомагнитного поля для обеспечения испытания наноспутников размером не превышающих границ сферы диаметром 100 мм.The article provides an overview of existing domestic and foreign stands for semi-realistic modeling of nanosatellite orientation systems. Their comparative analysis on the basic technical characteristics is carried out. The general trends in the structure of the stands are determined. The results of designing a geomagnetic field simulator for providing a test of nanosatellites of a size not exceeding 100 mm diameter spheres are given

Metallacyclopeptide

Therefore, linear peptides with two metal binding sites were obtained by solid phase synthesis. Upon coordination of these ligands to a metal centre a metalla-cyclopeptide will be formed. The choosen peptide sequences are found in naturally occuring proteins or cyclopeptides, which bioactivities depends on the sequence of the amino acids as well as it´s loop type structure. Pd(II) and Mo(VI)O2 are used as metal centres to obtain different conformations at the peptide backbone in the metalla-cyclopeptides. This requires the use of pyridine and catechol as metal binding sites. Following to this concept, a series of Mo(VI)O2-metalla-cyclopeptides could be obtained in a highly stereoselektiv manner. These metalla-cyclopeptides represents analogs of the RGD front in Echistatin, which binds to the integrins, of the estrogen-like cyclopeptides Segetalin A and B and finally of the somatostatin-like cyclopeptide Urotensin II, which posses vasoconstrictor activity. Furthermore, pentapeptide-bridged macrocyclic Mo(VI)O2-complexes were synthesized, that offers more knowledge in the stabilisation of peptide-a-helical structure

Metallacyclopeptide

Therefore, linear peptides with two metal binding sites were obtained by solid phase synthesis. Upon coordination of these ligands to a metal centre a metalla-cyclopeptide will be formed. The choosen peptide sequences are found in naturally occuring proteins or cyclopeptides, which bioactivities depends on the sequence of the amino acids as well as it´s loop type structure. Pd(II) and Mo(VI)O2 are used as metal centres to obtain different conformations at the peptide backbone in the metalla-cyclopeptides. This requires the use of pyridine and catechol as metal binding sites. Following to this concept, a series of Mo(VI)O2-metalla-cyclopeptides could be obtained in a highly stereoselektiv manner. These metalla-cyclopeptides represents analogs of the RGD front in Echistatin, which binds to the integrins, of the estrogen-like cyclopeptides Segetalin A and B and finally of the somatostatin-like cyclopeptide Urotensin II, which posses vasoconstrictor activity. Furthermore, pentapeptide-bridged macrocyclic Mo(VI)O2-complexes were synthesized, that offers more knowledge in the stabilisation of peptide-a-helical structure

Исследование морфологии и фазового состава частиц гетероструктур ZnO/ZnS, полученных методом электроискрового диспергирования

В данной работе исследованы гетероструктуры ZnO/ZnS, полученные методом электроискрового диспергировании. Приведены результаты исследования морфологии и фазового состава и рассчитаны области когерентного рассеяния (ОКР) полученных порошков. Показано, что средний диаметр наностержней ZnS совпадает со значением ОКР