Inrforafika as a means of imaging results of the survey

The article describes the technology of the organization of sociological research as one of the ways of organizing an interdisciplinary group project. On the example of the developed infographic shows how visual interpretation of indicators comparisonsВ статье описана технология организации социологического исследования как одни из способов организации междисциплинарного группового проекта. На примере разработанной инфографики показаны способы визуальной интерпретации индикаторов показателей сравнени

Vacuum birefringence in high-energy laser-electron collisions

Real photon-photon scattering is a long-predicted phenomenon that is being searched for in experiment in the form of a birefringent vacuum at optical and X-ray frequencies. We present results of calculations and numerical simulations for a scenario to measure this effect using multi-MeV photons generated in the collision of electrons with a laser pulse. We find that the birefringence of the vacuum should be measurable using experimental parameters attainable in the near future.Comment: 6 pages, 7 figure

Ecological and biological features of Triglochin maritima L. in the biotopes of the littoral zone with different degree of flooding on the coast of the White Sea

The study of Triglochin maritima L. was carried out on the Pomor (western) coast of the White Sea, in the Republic of Karelia (64°22'81"N, 35°93'14"E). Morphological analysis of aboveground and underground parts of the clones was performed on virginal plants. Anatomical analysis of leaf sheaths of the current year shoots, rhizomes and adventitious roots was carried out. The viability of pollen was assessed by determining the relative share of normally developed and malformed pollen grains. The content of heavy metals was determined in the soil, sea water and plant samples. The study was carried out on a model transect in the littoral zone on three test plots representing the lower littoral; the middle and the upper littoral zones. Adaptation to wave and storm impact was manifested in a well-developed system of underground organs. In the lower littoral, underground part surpasses the aboveground vegetative organs in terms of the mass and the formation of mechanical tissues. This allows the plants to anchor stronger in the substrate. Pollen analysis confirmed the adaptability of T. maritima plants to the conditions of the lower littoral by a high percentage of normal and, consequently, fertile pollen, which ensures sexual reproduction of the species. T. maritima can be considered as a Fe hyperaccumulator as the plant accumulates very high levels of Fe (22–34 g kg-1), especially in the lower and middle littoral zones, both in underground and aboveground organs. The ability of T. maritima plants to actively deposit metals was revealed on the basis of the coefficient of biological absorption of metals and makes it possible to suggest potential possibility of using the species in phytoremediation technologies on coastal territories

Low-Molecular Antioxidants Help Rare Orchids to Survive in Serpentine Dumps

В статье представлены результаты исследования морфофизиологических и биохимических характеристик орхидеи Epipactis atrorubens, произрастающей в естественном лесном фитоценозе и техногенно нарушенных местообитаниях. Изучены параметры листовой пластинки, водный режим листьев, уровень перекисного окисления липидов, а также содержание фотосинтетических пигментов и низкомолекулярных антиоксидантов в листьях растений. Результаты исследования показали, что адаптивные структурные перестройки листа и активация системы антиоксидантной защиты определяют не только способность редкого вида орхидей выживать в неблагоприятных условиях, но и успешно адаптироваться к ним.The article presents the results of a study of morphophysiological and biochemical characteristics of the orchid Epipactis atrorubens, growing in natural forest community and technogenic habitats. Leaf mesostructure, water regime and biochemical features (level of lipid peroxidation, content of photosynthetic pigments and low molecular weight antioxidants) of plants have been studied. The present study showed that the adaptive leaf structural rearrangements and activation of antioxidant defense system determine not only the ability of a rare orchids to survive in negative conditions, but also to successfully adapt to them

POLYFLUOROALKYL-2-(HET)ARYLHYDRAZONO-1,3-DICARBONYL COMPOUNDS IN INTRAMOLECULAR CYCLIZATION REACTIONS

This work was financially supported by the Program UB RAS (Grant number 18-3-3-13)

QED cascades induced by circularly polarized laser fields

The results of Monte-Carlo simulations of electron-positron-photon cascades initiated by slow electrons in circularly polarized fields of ultra-high strength are presented and discussed. Our results confirm previous qualitative estimations [A.M. Fedotov, et al., PRL 105, 080402 (2010)] of the formation of cascades. This sort of cascades has revealed the new property of the restoration of energy and dynamical quantum parameter due to the acceleration of electrons and positrons by the field and may become a dominating feature of laser-matter interactions at ultra-high intensities. Our approach incorporates radiation friction acting on individual electrons and positrons.Comment: 13 pages, 10 figure