| Editorial | 5 |
| Streďanský M., Labuda J. Biosensor with L-Phenylalanine Dehydrogenase and Diaphorase Immobilized on Nanocomposite Electrode for the Determination of L-Phenylalanine in Urine | 7 |
| Zeleev R.M., Safin A.R. The Ways and Steps of Improving the Parametric System of Twisted-Wing Insects (Insecta: Strepsiptera) | 17 |
| Gorbunov R.P. Seasonal Dynamics and Life Cycle of Micropsectra Notescens (Diptera, Chironomidae) | 52 |
| Khamitov O.I., Tarasov G.S., Yakovlev V.A., Frolova L.A. The Influence of Seasonal Water Level Dynamics on the Littoral Macrozoobenthos of the Kuibyshev Reservoir near the Village Staroye Arakchino (Kazan) | 58 |
| Bakin O.V. On the Plants from the Minerotrophic Fens of Tatarstan | 67 |
| Gordeev A.S., Gainullina L.A., Shinkarev A.A. Lipids in Arable Soils Exposed to Regular Pollution by Overland Runoff from Oil-Production Sites | 76 |
| Korolev E.A. Stages in the Transformation of Sandstone Reservoirs of the Tula and Bobrikov Horizon in the Erosional Incisions of Tatarstan Republic | 87 |
| Mattash M.A., Alhaj M.A., Mattash K.M., Safaraliev N.S., Khassanov R.R. Mineral Associations of Barite-Polymetallic Mineralization in Mesozoic Sediments at Wadi Al-Masilah Basin (Yemen) | 98 |
| Nikolaev A.G., Elnazarov S.A. The Nature of Coloring and Colorimetric Parameters of Gemstones from the Kukhilal Field (Southwestern Pamir) | 109 |
| Kosarev V.E., Goncharova G.S., Platov B.V. Calculation of the Macroscopic Capture Cross Section of Thermal Neutrons Using the Monte-Carlo Method | 122 |
| Mukhametzanov I.T. Calculation of Inhalable Fraction of Disperse Pollution with Regard to Protective Mask | 133
|
