Geosciences

Kiselev G.P., Yakovlev E.Yu., Druzhinin S.V., Kiseleva I.M., Bazhenov A.V., Bykov V.M.

Assessment of radioactivity of environmental components in the Kostomuksha state Nature Reserve. P. 3–13

Krasnov A.N., Kolovertnov G.Yu., Prakhova M.Yu., Khoroshavina E.A.

Improving data transfer effi ciency in a gas fi eld wireless telemetry system. P. 14–20

Shakirova A.I., Ismakov R.A., Agliullin A.Kh., Tsenev N.K.

Investigation of tribotechnical and corrosion behaviour of material for light-alloy drill pipes. P. 21–27

Biology

Dvoretsky V.G., Dvoretsky A.G.

Features of winter zooplankton assemblage in the central trough of the Barents Sea. P. 28–36

Kishchenko I.T.

Development of introduced species Malus Mill. (Rosaceae Adans.) in South Karelia. P. 37–44

Potapov G.S., Kolosova Yu.S., Bolotov I.N.

A possible bivoltine development of several bumblebee species in Europe. P. 45–51