Subjects -> BIOLOGY (Total: 3268 journals)
    - BIOCHEMISTRY (248 journals)
    - BIOENGINEERING (143 journals)
    - BIOLOGY (1548 journals)
    - BIOPHYSICS (53 journals)
    - BIOTECHNOLOGY (243 journals)
    - BOTANY (233 journals)
    - CYTOLOGY AND HISTOLOGY (32 journals)
    - ENTOMOLOGY (67 journals)
    - GENETICS (165 journals)
    - MICROBIOLOGY (279 journals)
    - MICROSCOPY (13 journals)
    - ORNITHOLOGY (29 journals)
    - PHYSIOLOGY (73 journals)
    - ZOOLOGY (142 journals)

BIOPHYSICS (53 journals)

Showing 1 - 52 of 52 Journals sorted alphabetically
Acta Biochimica et Biophysica Sinica     Hybrid Journal   (Followers: 5)
Advanced NanoBiomed Research     Open Access  
Annual Review of Biophysics     Full-text available via subscription   (Followers: 24)
Archives of Biochemistry and Biophysics     Hybrid Journal   (Followers: 17)
BBA Advances     Open Access   (Followers: 4)
BBA Bioenergetics     Hybrid Journal   (Followers: 5)
BBA Biomembranes     Hybrid Journal   (Followers: 11)
Biochemical and Biophysical Research Communications     Hybrid Journal   (Followers: 17)
Biochemistry and Biophysics Reports     Open Access  
Biochimica et Biophysica Acta (BBA) - General Subjects     Hybrid Journal   (Followers: 12)
Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids     Hybrid Journal   (Followers: 6)
Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease     Hybrid Journal   (Followers: 12)
Biochimica et Biophysica Acta (BBA) - Molecular Cell Research     Hybrid Journal   (Followers: 10)
Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics     Hybrid Journal   (Followers: 11)
Bioinspired, Biomimetic and Nanobiomaterials     Hybrid Journal   (Followers: 3)
Biophysical Chemistry     Hybrid Journal   (Followers: 8)
Biophysical Journal     Hybrid Journal   (Followers: 46)
Biophysical Reports     Open Access   (Followers: 5)
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 5)
Biophysics     Hybrid Journal   (Followers: 8)
Biophysics Reports     Open Access  
BMC Biophysics     Open Access   (Followers: 4)
Cell Biochemistry and Biophysics     Hybrid Journal   (Followers: 6)
Current Topics in Biophysics     Open Access   (Followers: 2)
Doklady Biochemistry and Biophysics     Hybrid Journal   (Followers: 1)
European Biophysics Journal     Hybrid Journal   (Followers: 4)
Food Biophysics     Hybrid Journal   (Followers: 3)
Freshwater Biology     Hybrid Journal   (Followers: 31)
GSTF Journal of BioSciences     Open Access  
IEEE Life Sciences Letters     Hybrid Journal  
IEEE Nanotechnology Express     Hybrid Journal   (Followers: 18)
Indian Journal of Biochemistry and Biophysics (IJBB)     Open Access   (Followers: 3)
International Journal of Biochemistry and Biophysics     Open Access   (Followers: 1)
International Journal of Biophysics     Open Access  
Journal of Biopharmaceutical Statistics     Hybrid Journal   (Followers: 23)
Journal of Biophotonics     Hybrid Journal   (Followers: 1)
Journal of Biophysical Chemistry     Open Access   (Followers: 3)
Journal of Biophysics and Structural Biology     Open Access   (Followers: 2)
Journal of Medicine, Physiology and Biophysics     Open Access  
Journal of Physical Chemistry & Biophysics     Open Access  
Membranes and Membrane Technologies     Full-text available via subscription  
Nanomedicine Research Journal     Open Access  
Nanomedicine: Nanotechnology, Biology and Medicine     Hybrid Journal   (Followers: 5)
Natural Products and Bioprospecting     Open Access   (Followers: 2)
Nature Communications     Open Access   (Followers: 310)
PMC Biophysics     Open Access  
Progress in Biophysics and Molecular Biology     Hybrid Journal   (Followers: 1)
Progress in Physical Geography     Hybrid Journal   (Followers: 11)
Quarterly Reviews of Biophysics     Hybrid Journal   (Followers: 3)
Radiation and Environmental Biophysics     Hybrid Journal   (Followers: 3)
Research & Reviews : A Journal of Life Sciences     Open Access  
Statistics in Biopharmaceutical Research     Full-text available via subscription   (Followers: 15)
Similar Journals
Journal Cover
Biophysics
Journal Prestige (SJR): 0.216
Number of Followers: 8  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1555-6654 - ISSN (Online) 0006-3509
Published by Springer-Verlag Homepage  [2537 journals]
  • A Hypothesis about the Physical Nature of the Phenomenon of Life (A
           Contribution to the Discussion of the Paper by G.R. Ivanitskii 21st
           Century: What Is Life from the Perspective of Physics)

    • Free pre-print version: Loading...

      Abstract: A macroscopic quantum state that is characterized by an energy gap in the electronic spectrum and occurs in organic structural components of the cell is hypothesized to provide a basis for the phenomenon of life. The width of the band gap has been estimated. The possibility of detecting this energy gap in an experimental study is discussed.
      PubDate: 2021-09-01
       
  • The Skeletal System as an Additional Storage System for Iodine Isotopes

    • Free pre-print version: Loading...

      Abstract: Using the gamma-spectrometric method we found that the radioactive isotope 125I, when entering the body of a rat, actively accumulated not only in the thyroid gland, but also in the bones. The 125I activity level in bone tissue was quite comparable to that of 90Sr, for which bone tissue is critical. Although the specific radioactivity of 125I in bones is significantly lower than in the thyroid gland, the great mass of bone tissue in the skeleton underlies the high level of radiation to the red bone marrow. 131I, which is not only a gamma but also a beta emitter and a leading radionuclide in dose formation during the first days after an accident, is also released to the environment from nuclear power facilities, along with the accidental release of 125I. In this regard, the results obtained for 125I are quite comparable to data on 131I in terms of the identical nature of their distribution in animals and humans.
      PubDate: 2021-09-01
       
  • The Origin of Life in the Context of Inanimate Nature

    • Free pre-print version: Loading...

      Abstract: Questions about the nature of life and the ability of living things to evolve are still attracting attention of scientists from different backgrounds. The idea that all living organisms originate from a common ancestor makes it difficult for biologists to give an essential definition of life. Use of the conceptual apparatus of other sciences can probably break this logical circle. Nevertheless, biology can describe unusual and paradoxical features of living things, such as their specific stability (the capability of reproduction) and variability. To describe how such phenomena can be possible, new physical ideas and models may be necessary.
      PubDate: 2021-09-01
       
  • The Hepatoprotective Effect of Peroxiredoxin 6 in
           Ischemia–Reperfusion Kidney Injury

    • Free pre-print version: Loading...

      Abstract: Oxidative stress caused by ischemia–reperfusion kidney injury may play a key role in liver dysfunction. To reduce liver and kidney damage in ischemia–reperfusion kidney injury, an exogenous enzyme antioxidant peroxiredoxin 6 was used, which is able to restore a wide range of hydroperoxides and is a participant in intracellular and intercellular signal transmission. Rats were subjected to ischemic kidney injury for 45 min with simultaneous left-sided nephroectomy and examined after 24 and 48 h of reperfusion. Peroxiredoxin 6 was administered intravenously 15 min before ischemia. Injury to the renal and hepatic tissues was determined by histological methods; in addition, the concentrations of creatinine, urea, alanine aminotransferase and aspartate aminotransferase in the blood were measured to assess the functionality of the organs. Reperfusion led to an increase in the concentrations of creatinine, urea, alanine aminotransferase and aspartate aminotransferase in blood plasma; there was also violation of the architecture of renal nephrons and the development of a pronounced vascular reaction in the liver with foci of degenerative changes. The use of exogenous peroxiredoxin 6 led to a decrease in the damage to the renal and hepatic tissues and normalization of the level of renal and hepatic metabolites. Thus, peroxiredoxin 6 showed both a nephroprotective effect in renal ischemia–reperfusion and reduced morphofunctional damage to distant organs, in particular, the liver.
      PubDate: 2021-09-01
       
  • Study of the Spectral Characteristics of L-Lysine and L-Arginine Using
           UV-VIS Spectroscopy and Steady-State and Synchronous Fluorescence
           Spectroscopy

    • Free pre-print version: Loading...

      Abstract: The recently discovered luminescent properties of nonaromatic amino acids with excitation-dependent photoluminescence in the absence of conjugation within individual molecules have aroused great interest. Although the existence of the phenomenon of internal luminescence no longer is doubted, the nature of this process remains unclear. The authors tried to advance the understanding of these processes in the study of the spectral-luminescent properties of L-lysine and L-arginine using adsorption spectroscopy in the ultraviolet and visible ranges, as well as stationary and synchronous fluorescence spectroscopy.
      PubDate: 2021-09-01
       
  • The Study of Steroid Keys for Androgen Receptors

    • Free pre-print version: Loading...

      Abstract: The conformational diversity of isomers of natural and synthetic steroids was analyzed on the basis of semi-empirical quantum chemical calculations and docking. The binding of various isomers and analogues of testosterone to the androgen receptor was modeled. Special attention was paid to the role of structural and thermodynamic factors in determining the preferred isomers of testosterone that might determine the best functioning of its complex with the androgen receptor.
      PubDate: 2021-09-01
       
  • Cell-Impermeable Peptide Fragments of Survivin and Hsp70/Hsp90-Organizing
           

    • Free pre-print version: Loading...

      Abstract: Membrane-associated and secreted extracellular heat shock proteins 90 (Hsp90) have important roles in the migration, invasion, and metastasis of tumor cells and are proposed as promising therapeutic target for the development of antimetastatic agents. In previous studies, peptide fragments of survivin (KHS-SGCAFL) and Hsp70/Hsp90-organizing protein (KAYARIGNSYFK), that bind to the intracellular form of Hsp90 have been identified. In this study, we investigated the effects of the Hsp90-binding peptides on the migration and invasion of human fibrosarcoma HT1080 and glioblastoma A-172 cells. Cell-impermeable Hsp90-binding peptide fragments of survivin and Hsp70/Hsp90-organizing protein did not exert cytotoxic and antiproliferative activity against cells, while cell-permeable Hsp90-binding peptides which contain the Antennapedia homeodomain sequence were toxic for HT1080 and A-172 cells. Cell-impermeable Hsp90-binding peptides slightly decreased the basal (unstimulated) cell migration and invasion, although they strongly inhibited the migration/invasion of cells stimulated by extracellular Hsp90. These results demonstrate that cell-impermeable Hsp90-binding peptides are able to inhibit the activity of extracellular Hsp90, thereby leading to the suppression of the migration and invasion of cells. Such peptides have a potential for the development of antimetastatic drugs.
      PubDate: 2021-09-01
       
  • Natural Scientific and Theological Approaches to Understanding How the
           Existing Reality “Is Arranged”

    • Free pre-print version: Loading...

      Abstract: This paper discusses whether natural sciences suffice to explain everything that happens in our reality or whether “higher forces” that do not fit into the materialistic concept are inevitable in the explanation. Macroevolution (the formation of new species) and thinking are used as examples of phenomena that cannot be explained within the classical (conventional) natural-scientific approach. However, if certain quantum and relativistic processes, which are only theoretically studied now, exist and occur in our reality, then it becomes fundamentally possible to explain both macroevolution and thinking without involving higher forces.
      PubDate: 2021-09-01
       
  • A Comparative Analysis of Algorithms for Estimating the Movement of the
           Center of Mass According to Force Plate Data

    • Free pre-print version: Loading...

      Abstract: The approaches to determining the horizontal coordinates of the center of mass (CoM) applicablefor force plate are compared. The force plate for which only vertical forces are the measurements takes into account. The first of these approaches uses the information not only about the initial position and rate of CoM, but also about its terminal state. The second is associated with the use of the assumption about the absence of unstable components in the movement and uses frequency filtering methods. Known algorithms were modified to solve the problem in conditions of sufficiently intense movements by a person. The considered modified algorithms were compared for recordings movement of the subjects who performed a “test with a stepwise visual disturbance” on a force plate. A system of video cameras was simultaneously used to determine the coordinates of a marker fixed approximately at the CoM height. The working capacity of all modified algorithms was demonstrated. It was noted that the error of the estimation method using a double filtration in forward and reverse time was lower than in other procedures.
      PubDate: 2021-09-01
       
  • The Antitumor and Cytotoxic Effects of Polyacrylates of Noble Metals

    • Free pre-print version: Loading...

      Abstract: We compared the antitumor and cytotoxic activities of two polyacrylic acid-based compounds containing gold (aurumacryl) and silver (argacryl). The tested substances successfully inhibit the growth of some solid tumors in mice (Lewis lung carcinoma, Acatol adenocarcinoma, and Ca-755 adenocarcinoma) and exert pronounced cytotoxic activity against human tumor cells (MCF-7 cell culture). The coefficient of murine tumor growth inhibition varies between 55 and 90% with reference to the control. The index of the cytotoxic effect, IC50, is 25 μg/mL and 100 μg/mL for argacryl and aurumacryl, respectively. The sensitivity of animal tumor cells in vivo and human tumor cells in vitro to the tested substances depends on the nature of the metal coordinated in the polymer compound.
      PubDate: 2021-09-01
       
  • The Effect of Pressure of Gas Mixtures Containing Carbon Monoxide, Oxygen
           and Argon on the Shelf Life of Rat Heart Tissues in Hypothermic Conditions
           

    • Free pre-print version: Loading...

      Abstract: The effect of different pressure levels of a gas mixture of carbon monoxide and oxygen on the shelf life of rat heart tissue during prolonged hypothermic (4°C) gas preservation with the durations of sample storage of 24, 36, and 48 h was evaluated. The pressure decrease of the CO/O2 gas mixture (in the ratio of 1 : 1) from 6.5 to 1.5 atm during 24 h preservation led to the appearance of myocardial infarction zones (17.74 ± 3.5% of the total sample area) and a violation of the contractile function of the ventricles. At the same time, the indicators of the heart shelf life after storage under pressure of 3.5 and 6.5 atm did not significantly differ. The advantage of the pressure of 6.5 atm compared to the pressure of 3.5 atm during 36 and 48 h preservation was observed. The myocardial infarction zones after 48 h of preservation were 33.65 ± 11.96% and 61.92 ± 6.38%, respectively. Exploratory introduction of argon to the gas mixture (CO : O2 : Ar = 2 : 2 : 1) for a possible synergistic increase in organoprotection in the experiments on heart preservation under the pressure of 3.5 atm did not result in significant improvement in the index of heart tissue shelf life. The potential mechanisms of the protective effect of the mixture of carbon monoxide and oxygen in hypothermic preservation are discussed.
      PubDate: 2021-09-01
       
  • The Current Understanding of the Properties of Liquid Water: A Possible
           Alternative Solution

    • Free pre-print version: Loading...

      Abstract: Based on information extracted from the published literature, we analyze the current state of knowledge on the properties of liquid water. There is a discrepancy between the efforts made and the results achieved. There is still no common model and clear prospects. While searching for an optimal solution to the problem, we propose to use the gas–solid-state Frenkel approach, which takes the interconversion of molecules and ions into account. It is demonstrated that this model can be used to provide a uniform and consistent description of the most important parameters of liquid water such as dielectric constant, evaporation enthalpy, self-diffusion coefficient, viscosity, and thermal conductivity.
      PubDate: 2021-09-01
       
  • The Hemoglobin Conformation in Erythrocytes at Different Levels of Oxygen
           Partial Pressure

    • Free pre-print version: Loading...

      Abstract: The variation in the conformations of hemoglobin heme and globin in response to different oxygen partial pressures (pO2) has been studied by Raman spectroscopy inside erythrocytes and in hemoglobin dissolved in incubation medium. The spectra of hemoglobin inside erythrocytes and in the medium show that several characteristic bands in the range from 1000 to 1700 cm–1 (stretching vibrations in the heme group) and in the high-frequency range from 2800 to 3000 cm–1 (stretching vibrations in globin amino acids) vary with pO2 levels. The curve of hemoglobin saturation with oxygen (sO2) obtained from the Raman-scattering data displays sigmoidal behavior only in hemoglobin inside erythrocytes. It has been shown that differences in heme conformation at different pO2 levels affect the ability of hemoglobin to form complexes with nitric oxide. As the pO2 level increases, the conformational changes of hemoglobin heme in the cell entail an increase in the contribution of vibrations of lateral –CH3 groups in pyrrole half-rings and group vibrations of bonds inside pyrrole half-rings, whereas the globin conformation is associated with a higher contribution of vibrations from H-methine groups and symmetrical terminal methylene groups in amino acids.
      PubDate: 2021-09-01
       
  • The Fluorescence of Phytoplankton Chlorophyll from the Moskva River in the
           Presence of Mercury Ions

    • Free pre-print version: Loading...

      Abstract: This paper presents the results of an observational study carried out for monitoring three sites along the Moskva River with different pollution levels by using chlorophyll fluorescence parameters. The photosynthetic activity of phytoplankton along the river bed was diverse. The photochemical activity of the phytoplankton was higher in the relatively clean water of the river (the entrance of the river to the city) and lower in the polluted water (middle reaches of the river and at the exit of the city). The efficiency of the light reactions of photosynthesis in photosystem II (FV/FM, PIABS) for the phytoplankton was higher in the spring than in the summer months. These processes were accompanied by a decrease in the dissipation of absorbed energy into heat (φDo). Incubation of the phytoplankton from the Moskva River in the presence of mercury chloride salts was performed. It was found that addition of mercury chloride salts resulted in different sensitivity to the toxic effects of phytoplankton samples collected from different sites along the river, as well as lower resistance of phytoplankton to mercury in summer season compared to that in the spring. The most sensitive parameter to the toxic effects of mercury was the photosystem II performance index (PIABS), which can be recommended for bioassay and biomonitoring of the activity of photosynthetic reactions of phytoplankton in natural conditions.
      PubDate: 2021-09-01
       
  • Methods of Studying Ultraweak Photon Emission from Biological Objects: I.
           History, Types and Properties, Fundamental and Application Significance

    • Free pre-print version: Loading...

      Abstract: This review is devoted to the methods for studying the ultraweak luminescence of biological objects; in addition to modern methods aimed at studies in the visible, near-infrared, and near-ultraviolet ranges, considerable attention is paid to the analysis of the methodology for studying the component belonging to the middle ultraviolet range (called mitogenetic radiation in early works). Studies of mitogenetic radiation were carried out in 1923–1948 and remain partially controversial. Many of the results, which were revolutionary for that time, have already been confirmed and the scientific problems of the rest are of significant interest (for example, fundamental results concerning cell division and carcinogenesis and early cancer diagnostics); therefore, the analysis of their methodology is relevant for further experimental verification of these studies. The first part of the review covers the common questions like the history of research and development of methodology, types and properties of ultra-weak photon emission, basic terms, fundamental and application significance of research (the second and the third parts will review biological and physical methods).
      PubDate: 2021-09-01
       
  • The Reason that Discussion of What Life Is from the Perspective of Physics
           Still Continues (A Response to the Article by A.M. Smolovich “A
           Hypothesis about the Physical Phenomenon of Life”)

    • Free pre-print version: Loading...

      Abstract: The mechanism whereby an energy gap forms during the interaction of open nonlinear systems is considered at various hierarchical levels of their organization. It is shown that the presence of an energy gap is not a specific feature of living systems and is observed as well in systems that are commonly called inanimate.
      PubDate: 2021-09-01
       
  • Bioelectrochemical Modeling of Toluidine Blue Diffusion in a Hydrogel in
           the Presence of Peroxidase and Trypsin

    • Free pre-print version: Loading...

      Abstract: The electrochemical behavior of a phenothiazine dye, toluidine blue, in a gelatin hydrogel in the presence of trypsin, peroxidase, and their combination was studied by cyclic voltammetry. It has been shown that peroxidase contained in the hydrogel has a significant effect on the electrochemical transformations of toluidine blue during the first 30 s of measurements. The addition of trypsin enhances the effect of peroxidase catalysis. The possibility of simultaneous assessment of proteolysis and redox equilibrium in a model hydrogel system when analyzing current–voltage curves of cyclic voltammetry was experimentally justified. The results we obtained substantiate the scheme and principles of bioelectrochemical modeling of the diffusion of electroactive molecules in the extracellular matrix.
      PubDate: 2021-09-01
       
  • The Effect of Hibernation on Lipid Metabolism in the Neocortex of the
           Long-Tailed Ground Squirrel Spermophilus undulatus

    • Free pre-print version: Loading...

      Abstract: The effect of hibernation on the content of individual phospholipids and neutral lipids, as well as the effect of the states of torpor (dormant long-tailed ground squirrels Spermophilus undulatus) and exit from it (winter active long-tailed ground squirrels) on the synthesis of lipids in the neocortex tissue have been shown. A decrease in the content of fatty acids and diglycerides in the neocortex of active long-tailed ground squirrels compared to summer animals was found. The incorporation of the label in the tissue and lipids of the neocortex in awakened long-tailed ground squirrels was reduced by 25%; this was explained by a decrease in the concentration of 14C-acetate due to the utilization of acetate during respiration in awakened long-tailed ground squirrels. Lipids of the neocortex of the long-tailed ground squirrel participate in adaptation to hypobiosis by increasing the content of the total fraction of phospholipids and modifying the phospholipid composition with an increase in the proportions of phosphatidylcholine, phosphatidylinositol, and phosphatidylserine.
      PubDate: 2021-09-01
       
  • The Effect of Gases on the Structural Integrity of Ice that Forms when
           Water and Cryoprotective Solutions Are Frozen: An Optical-Microscope Study
           

    • Free pre-print version: Loading...

      Abstract: The effects of air, helium, argon, xenon, and sulfur hexafluoride on the integrity of the ice structure formed when water and a cryoprotective solutions were frozen in the temperature range from 0 to –50°C was studied using optical microscopy. It was shown that the crystallization of a water drop with a volume of approximately 200 μL in the air atmosphere occurred with a violation of the integrity of the ice structure. Formation of gas microbubbles with a diameter of up to 250 μm was observed in the frozen samples. Purging of argon, xenon, or sulfur hexafluoride over the surface of a water drop before freezing reduced the maximum size of microbubbles to 100 μm. Purging of helium above the surface of water, DMEM (Dulbecco’s Modified Eagle Medium), and EuroCollins solutions made it possible to completely eliminate or significantly reduce the formation of gas microbubbles during crystallization. The ice formed in this case was characterized by a tendency to reduce the probability of cracking when cooled to –50°C, which can contribute to the survival of biological material during preservation. The addition of a cryoprotector, ethylene glycol, at a concentration of 1–10 vol % in the solution made it possible to reduce or completely prevent the release of microbubbles of gas during freezing. The mechanism by which this phenomenon occurred remains unclear. Addition of ethylene glycol at a concentration of 10 vol % or more also prevented ice cracking when it was cooled to –50°C.
      PubDate: 2021-09-01
       
  • On the Question of Self-Organization of Population Dynamics on Earth

    • Free pre-print version: Loading...

      Abstract: A new mathematical model based on the predator–prey interactions has been proposed. Strictly analytical solution has been found for a system of nonlinear differential equations describing accurately the dynamics of population concentration on the Earth’s land surface, taking into account the main cut-off factors influencing its spatio-temporal evolution. Using the proposed model it is shown that the population of the Earth tends to increase, and then, due to the system’s permeability, after reaching the maximum, the population size begins to decline. This observation is confirmed by rigorous mathematical and numerical calculations.
      PubDate: 2021-09-01
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 52.23.215.230
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-