"Neutron Activation Analysis of the samples of molluscs: the features and application"

Nekhoroshkov P. S., Bezuidenhout J., Frontasyeva M. V., Zinicovscaia I. I., Yushin N. S., Vergel K. N., Petrik L.

 

During several years, the neutron activation analysis at the REGATA facility of the IBR-2 was successfully used for estimation of concentrations of macro- and microelements in the samples of mussels and oysters from coastal zone of the South Africa. The ability of the method to determine the element-markers of anthropogenic (Zn, As and Br) and terrigenous component (Sc, Ti, Th) in the soft tissue and shells of molluscs in complex biomonitoring studies was shown. In addition, the differences of accumulation of elements by alien species and indigenous species were found.

The human health risks in mussels consumption (based on guidelines of WHO JECFA, IRIS EPA US) were assessed for such elements as Al, Cr, Mn, Fe, Co, Ni, Zn, As, Se, Br, Sr, Sb, I and U for the first time for 8 selected coastal zones of South Africa region. At the levels of consumption in more than 300 g per capita per week such elements as Al, Cr, Fe, Co, Zn, As and I revealed the high risks for human health in the zone of Cape Town (St. 5, Hout Bay) and Durban (St. 8).

 

Meeting agenda:

  1. Proposal for the opening of a new project "Modernization of the EG-5 accelerator and development of its experimental infrastructure".

Speaker: Doroshkevich A.S. 

  1. Elections for positions:
  • Head of the Raman Spectroscopy Sector, FLNP.

Candidate for the position: Arzumanyan G.M. 

  • Group leader, DSC FLNP.

Candidate for the position: Bulavin M.V. 

  • Group leader, DSC FLNP.

Candidate for the position: Chernikov A.N. 

  • Group leader, DSC FLNP.

Candidate for the position: Altynov A.V. 

"Search of criteria for determination of archaeological ceramics places of origin based on the data of the mass multielement NAA and statistical analysis of obtained results"

Yu. Dmitriev, W. Badavy, V.S. Smirnova, O.E. Chepurchenko, Yu.G. Filina, M.V. Bulavin

 

The study of ceramics is one of the most important directions in modern Russian archeology, as it makes up to 90% of the artifacts found during excavations. Until now, comparatively-descriptive methods have been mainly used to study it. Instrumental physicochemical methods are also used, however, researchers most often solve rather narrow tasks with their help. Despite the constant accumulation of data, their systematization is practically not carried out and reliable criteria, the application of which would allow to reliably establish the places of origin of ancient ceramics have not been found until now.

The purpose of this study is to determine the chemical (elemental) composition of different genesis ceramics, to accumulate a database for different regions and the results systematization.

 In this regard, several batches of samples were obtained from the Institute of Archeology of the Russian Academy of Sciences. They were studied by neutron activation analysis and X-ray fluorescence analysis, and statistical processing of the results was carried various methods. The seminar will present the results of the work done.

 

 

"Parallelizing multiple precision Taylor series method for integrating the Lorenz system"

I. Hristov1, R. Hristova1, S. Dimova1, P. Armyanov1, N. Shegunov1,Puzynin2, T. Puzynina2, Z. Sharipov2, Z.Tukhliev2

 1Sofia University, Faculty of Mathematics and Informatics, Bulgaria

2JINR, Laboratory of Information Technologies, Dubna, Russia

Meeting agenda:

1. Changes in the structure of DSC STC.

 

2. Elections for scientific positions:

2.1. Verkhoglyadov A.E. - Junior researcher

2.2. Kurilkin A.K. – Scientific researcher

2.3. Litvinenko E.I. - Senior researcher

2.4. Milkov V.M. - Senior researcher

2.5. Prikhodko V.I. - Leading researcher

2.6. Rzjanin M.V. - Scientific researcher

 

Links for secret voting will be sent to the members of DSC STC additionally