| 1. |
|
|
| 2. |
|
|
| 3. |
- Sobolev, A.M., et al.
(författare)
-
Methanol masers in star forming sites of the perseus spiral arm
- 2007
-
Ingår i: Proceedings of "Millimeter wave astronomy and star formation", ed. I. Zinchenko, Nizhny Novgorod, Russia, August 2007, Inst. of Applied Physics RAS. ; , s. 61-67
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)
|
|
| 4. |
|
|
| 5. |
- Balinsky, A., et al.
(författare)
-
Generalized Hardy inequality for the magnetic Dirichlet forms
- 2004
-
Ingår i: Journal of statistical physics. - 0022-4715 .- 1572-9613. ; 116:4-Jan, s. 507-521
-
Tidskriftsartikel (refereegranskat)abstract
- We obtain lower bounds for the magnetic Dirichlet form in dimensions d greater than or equal to 2. For d = 2 the results generalize a well known lower bound by the magnetic field strength: we replace the actual magnetic field B by an non-vanishing effective field which decays outside the support of B as dist( x, supp B)(-2). In the case d greater than or equal to 3 we establish that the magnetic form is bounded from below by the magnetic field strength, if one assumes that the field does not vanish and its direction is slowly varying.
|
|
| 6. |
- Castoria, Raffaello, et al.
(författare)
-
Conversion of the Mycotoxin Patulin to the Less Toxic Desoxypatulinic Acid by the Biocontrol Yeast Rhodosporidium kratochvilovae Strain LS11
- 2011
-
Ingår i: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 59:21, s. 11571-11578
-
Tidskriftsartikel (refereegranskat)abstract
- The infection of stored apples by the fungus Penicillium e., pansum Causes the contamination of fruits and fruit-derived products with the mycotoxin patulin, which is a major issue in food safety Fungal attack can be prevented by beneficial microorganisms, so-called biocontrol agents Previous time-course thin layer chromatography analyses showed that the aerobic incubation of patulin with the biocontrol yeast Rhodosporidium kratochvilovae strain LS11 leads to the disappearance of the mycotoxin spot and the parallel emergence of two new spots, one of which disappears over time In this work, we analyzed the biodegradation of patulin effected by LS11 through HPLC The more stable of the two compounds was purified and characterized by nuclear magnetic resonance as desoxypatulinic acid, whose formation was also quantitated in patulin degradation experiments After R. kratochvilovae LS11 had been incubated m the presence of (13)C-labeled patulin, label was traced to desoxypatulinic acid, thus proving that this compound derives from the metabolization of patulin by the yeast Desoxypatulinic acid was much less toxic than patulin to human lymphocytes and, in contrast to patulin, did not react in vitro with the thiol-bearing tripeptide glutathione The lower toxicity of desoxypatulinic acid is proposed to be a consequence of the hydrolysis of the lactone ring and the loss of functional, groups that react with thiol groups The formation of desoxypatulinic acid from patulin represents a novel biodegradation pathway that is also a detoxification process
|
|
| 7. |
- Delage, F., et al.
(författare)
-
ADS fuel developments in Europe : Results from the EUROTRANS integrated project
- 2011
-
Ingår i: Energy Procedia. - : Elsevier BV. ; , s. 303-313
-
Konferensbidrag (refereegranskat)abstract
- Fuels to be used in Accelerator Driven Systems dedicated to Minor Actinides transmutation can be described as highly innovative in comparison with those used in critical cores. Indeed, ADS fuels are not fertile, so as to improve the transmutation performance and they contain high volumetric concentrations (∼50%) of minor actinides and plutonium compounds. This unusual fuel composition results in high gamma and neutron emissions during its fabrication, as well as degraded performances under irradiation. Ceramic-Ceramic and Ceramic Metallic composite fuels consisting of particles of (Pu, MA)O2 phases dispersed in a magnesia or molybdenum matrix were investigated within the European Research programme for Transmutation, as driver fuels for a prospective 400MWth transmuter: the European Facility for Industrial Transmutation. Fuel performances and safety of preliminary core designs were evaluated to support the project. Out -of-pile as well as in-pile experiments were carried out to gain essential knowledge on properties and behaviour under irradiation of these types of fuel. This paper gives an overview of experimental results within the project.
|
|
| 8. |
- Ershova, Victoria B., et al.
(författare)
-
The De Long Islands : A missing link in unraveling the Paleozoic paleogeography of the Arctic
- 2016
-
Ingår i: Gondwana Research. - : Elsevier BV. - 1342-937X .- 1878-0571. ; 35, s. 305-322
-
Tidskriftsartikel (refereegranskat)abstract
- The vast Laptev and East Siberian shelves in the eastern Russian Arctic, largely covered by a shallow sea and buried beneath sea ice for 9 months of the year, remain one of the least studied parts of continental crust of the Earth and represent a big unknown when performing pre-Cenozoic geodynamic reconstructions of the Arctic. The De Long islands provide a vitally important window into the geology of this area and are a key for [1] understanding the Early Paleozoic history of the Amerasian Arctic. Four of them (Jeanette, Henrietta, Bennett and Zhokhov islands) were studied using structural data, petrographic and geochemical analyses and U-Pb zircon age dating to offer the following new constraints for the Early Paleozoic paleogeography of the Arctic realm. The basement beneath the De Long Islands is of Late Neoproterozoic to earliest Cambrian age, about 670-535 Ma. In the Early Paleozoic, the De Long Islands were located along the broad Timanian margin of Baltica, with a clastic sediment provenance from the Timanian, Grenville-Sveconorwegian, and Baltic Shield domains. The Cambro-Ordovician volcaniclastic successions on Jeannette and Henrietta islands formed part of a continental margin volcanic arc with a corresponding back-arc basin located to the south (in present co-ordinates). On the continent-ward side of the back-arc basin, shallow marine shelf clastic and carbonate rocks were deposited, which are exposed today on Bennett Island in the south-west of the archipelago (in modern coordinates). The De Long Islands together with other continental blocks, such as Severnaya Zemlya, Arctic Alaska-Chukotka, and the Alexander Terrane, formed the contiguous active continental margin of Baltica during the Early Paleozoic. Today however, these terranes are spread out over a distance of 5000 km across the Arctic and eastern Pacific margins due to the subsequent opening of a series of Late Paleozoic, Mesozoic and Cenozoic oceanic basins.
|
|
| 9. |
- Feklistov, P. A., et al.
(författare)
-
DENDROCHRONOLOGICAL STUDIES OF WOOD AT HISTORICALLY SIGNIFICANT SITES OF THE ARCTIC
- 2020
-
Ingår i: Izvestiya Vysshikh Uchebnykh Zavedenii, Lesnoi Zhurnal. - : M.V. Lomonosov Northern (Arctic) Federal University. - 0536-1036. ; :5, s. 106-118
-
Tidskriftsartikel (refereegranskat)abstract
- Studies of wood in the Arctic were carried out on Vaygach Island, Hooker Island (Franz Joseph Land) and Novaya Zemlya. During the expedition "Arctic Floating University - 2013", wood samples (cores) were taken from the buildings in key areas of the Arctic islands. Conforming to the wood samples we constructed tree-ring series and obtained floating chronologies, which were linked to dendroscales of standing trees with known year of each annual ring formation. Crossdating of floating chronologies was performed as follows. Dcndroscalc and floating chronology were overlapped and the synchronicity coefficient was calculated, then the dendroscale was shifted for a year and the coefficient was calculated again; the procedure was repeated until all possible options were checked. Visual similarity was assessed and the annual rings of floating chronology were dated based on the results with the maximum synchronicity coefficient, and the object was dated by the outermost ring. The year of formation of each annual ring of the buildings logs was determined by the dendrochronological method, resulting in assumption of the time of their construction, taking into account that it occurred a year or two after the tree felling. All the studied objects were located in areas with preserved history of their creation, which is highly important for confirming the objectivity of the obtained results. The dates of the buildings were determined as follows: Vaigach Island, 1945; Hooker Island (Franz Josef Land), 1936; the former bathhouse on Cape Zhelaniya (Novaya Zemlya), 1935; timber from the pillbox, 1938; the lighthouse, 1952; the frame on the coast of Ledyanaya Gavan' Bay (Novaya Zemlya), 1938; a relatively modern building on the coast of the bay, 1991. Interesting to note that according to the obtained historical records the Lighthouse was built in year 1954, while dating by annual rings shows that the logs were in 1952 and they were probably imported in advance. The years for the construction research based on the use of the dendrochronological method opens up great opportunities at determining the age of unnamed wooden in the Arctic.
|
|
| 10. |
|
|
