Biophysics

Công bố khoa học tiêu biểu

* Dữ liệu chỉ mang tính chất tham khảo

Sắp xếp:  
Description of chitosan binding to DNA at varied ionic strength within the framework of ion condensation and adsorption theories
Biophysics - Tập 52 - Trang 383-388 - 2007
E. A. Vorob’ev, Yu. D. Nechipurenko, V. I. Salyanov, Yu. M. Evdokimov
Chitosan binding to DNA was studied in solutions of different ionic strength. Data were analyzed within the model of ion condensation and the thermodynamic theory of extended ligand binding to DNA. The combination of these approaches allowed us to assess the sterical and energy characteristics of chitosan binding to DNA and to find the dependence of chitosan binding constant on solution ionic stre...... hiện toàn bộ
Wavelet analysis of nonstationary heart rate variability in a head-up tilt-table test
Biophysics - Tập 57 - Trang 530-543 - 2012
S. V. Bozhokin, E. M. Lesova, V. O. Samoilov, P. I. Tolkachev
Heart rate variability during the head-up tilt test (HUT) was investigated using an automated setup of dynamic positioning in the gravity field. The wavelet theory was applied to find the dynamics of changes in the spectral properties of rhythmograms during the transitional steps of HUT. Quantitative parameters (spectral integrals, instantaneous maximal frequencies, nonstationarity factors) that d...... hiện toàn bộ
Different Dosage Effects of Ozone on Oxygen Transport in Blood during in vitro Experiments
Biophysics - Tập 65 Số 5 - Trang 779-783 - 2020
Zinchuk, V. V., Biletskaya, E. S.
The effects of ozone on oxygen transport in the blood of experimental animals have been studied in vitro. Incubation of the blood with ozonated water at О3 concentrations of 2, 6, and 10 mg/L for 30 and 60 min caused changes in the oxygen-transport function of the blood, thus leading to increased oxygen tension and oxygenation, as well as reduced affinity of hemoglobin for oxygen. As a result...... hiện toàn bộ
The role of phosphoinositide-3-kinase in the control of shape and directional movement of the Physarum polycephalum plasmodium
Biophysics - Tập 53 - Trang 533-538 - 2009
N. B. Matveeva, S. I. Beilina, V. A. Teplov
The effects of wortmannin and LY294002, specific inhibitors of phosphoinositide-3-kinase, on the shape, locomotive behavior, and glucose chemotaxis were studied using the Physarum polycephalum plasmodium, a multinuclear amoeboid cell with the self-oscillatory mode of locomotive behavior. Both inhibitors were shown to cause a reduction in the plasmodium frontal edge and a decrease in the efficiency...... hiện toàn bộ
Cấu trúc sinh học như là các đối tượng quang phổ Dịch bởi AI
Biophysics - Tập 51 - Trang 664-667 - 2006
A. V. Il’inskii, F. Silva-Andrade, E. B. Shadrin, V. O. Samoilov, A. L. Orbeli
Quang phổ học, kính hiển vi lực nguyên tử, phân tích tia X và đo nhiệt dẫn đã được áp dụng để nghiên cứu các mẫu vỏ động vật thân mềm, lông đuôi công và mô sừng của con người. Các đối tượng này được phát hiện chứa các siêu cấu trúc có trật tự có vẻ như tương tác với sóng điện từ và sóng điện tử, do đó thể hiện các đặc tính quang học và bán dẫn.
#quang phổ học #kính hiển vi lực nguyên tử #phân tích tia X #đo nhiệt dẫn #vỏ động vật thân mềm #lông đuôi công #mô sừng
Relative occurrence of amino acid-nucleotide contacts assessed by Voronoi-Delaunay tessellation of protein-DNA interfaces
Biophysics - Tập 53 - Trang 199-201 - 2008
A. A. Anashkina, V. G. Tumanyan, E. N. Kuznetsov, A. V. Galkin, N. G. Esipova
The data for 1109 protein-DNA complexes in PDB were analyzed for direct contacts between particular amino acid residues and nucleotides by rigorous space partitioning (Voronoi-Delaunay tessellation). When the actual occurrence of each kind of residue-nucleotide contact in the interface was related to its chance expectation, the most abundant contacts (made by Arg or Lys as well as by Ser or Thr) p...... hiện toàn bộ
Influence of dissipation and external field on the dynamics of local deformations in DNA
Biophysics - Tập 52 - Trang 179-184 - 2007
L. V. Yakushevich, L. A. Krasnobaeva
The dynamics of local deformations in DNA is studied in a simple mathematical model based on the sine-Gordon equation with two additional terms, one accounting for the effects of dissipation and the other for the action of an external field. The energy method is used to derive equations for the velocity of the local deformation as a function of time. Conditions are determined when dissipation and ...... hiện toàn bộ
The effects of intracellular calcium dynamics on the electrical activity of the cells of the sinoatrial node
Biophysics - Tập 61 - Trang 893-900 - 2017
A. D. Khokhlova, R. A. Syunyaev, A. M. Ryvkin, D. V. Shmarko, M. A. Gonotkov, E. A. Lebedeva, V. A. Golovko, A. S. Moskvin, O. E. Solovyova, R. R. Aliev
We studied the effects of intracellular calcium dynamics on the spontaneous activity of the pacemaker cells using mathematical modeling. We compared the responses to the suppression of L-type calcium currents in several models of the electrical activity of cells of the sinoatrial node. All models showed a decrease in the maximum depolarization rate, the amplitude of action potentials, and the dura...... hiện toàn bộ
Spatial Adaptation of Populations in Ecological Models
Biophysics - Tập 63 - Trang 274-281 - 2018
V. G. Il’ichev, O. A. Il’icheva
A discrete dynamic model of populations is described; in this model, spatial migration is specified by a finite-state Markov chain, while growth and nonlinear interactions are defined by convex and concave functions. This makes it possible to efficiently analyze the dynamic process and the behavior of a system based on the theory of monotone operators. The adaptation mechanisms that underlie the e...... hiện toàn bộ
Experimental investigation of some systemic effects of nitric oxide inhalation
Biophysics - Tập 61 - Trang 139-143 - 2016
A. K. Martusevich, S. P. Peretyagin, A. G. Soloveva, A. A. Martusevich, A. D. Plekhanova
The goal of this work was to study the influence of nitric oxide inhalation on parameters of blood proand antioxidant systems in rats under both an intact condition and experimental thermal injury. We studied 40 Wistar rats that were divided into four equal groups. The intact group was subjected to no manipulation exñept a single blood sampling, main group I was subjected to inhalation of a air mi...... hiện toàn bộ
Tổng số: 1,698   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 10