Abstract：
:Two types of electrocardiographic data series were investigated using appropriate tests based on a selection of semi-quantitative analysis algorithms. Distribution histograms, power spectra, auto-correlation functions, state-space portraits, Lyapunov exponents and wavelet transformations were applied to electrocardiograms of normal and stressed subjects. Statistical analysis using the Student's t-test revealed significant and non-significant alterations in stress-loaded cases compared to normal ones. Higher levels of adrenaline may account for a more complex dynamics (deterministic chaos) revealed in the stressed subjects.
journal_name
Gen Physiol Biophysjournal_title
General physiology and biophysicsauthors
Neacsu I,Creanga DE,Tufescu FMsubject
Has Abstractpub_date
2006-06-01 00:00:00pages
161-76issue
2eissn
0231-5882issn
1338-4325journal_volume
25pub_type
杂志文章abstract：:Liposomes and proteoliposomes obtained from rat brain were used; structural changes induced by Vc5 cytotoxin (CT) from Central Asia cobra venom have been studied by the EPR method using spin probes (5-, 10-, or 12-doxylstearic acid). The addition of CT to liposome samples, containing spin probes resulted in the appear...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1984-12-01 00:00:00
abstract：:The hyperpolarisation of the membrane potential in Characeae above that of the diffusion potential is explained by the operation of the electrogenic proton pump. We studied the interaction of calcium with the functioning of the pump. The membrane potential was measured using the standard microelectrode technique. An i...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1985-04-01 00:00:00
abstract：:The effect of binding of an antitumour drug cis-diamminedichloroplatinum(II) (cis-[Pt(NH3)2Cl2]) to DNA on cutting effectiveness of BamHI, EcoRI, and SalI restriction endonucleases was quantitatively determined. The platinum complex inhibits the cleavage of plasmid pHC624 DNA linearized by BglI restrictase. From the p...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1992-12-01 00:00:00
abstract：:The aim of the study was to compare the effect of hemophane and polysulfone membranes on the phagocyte-derived production of reactive oxygen species (ROS) as well as on neutrophil CD11b and CD62L expression in patients undergoing regular hemodialysis. The effects of hemodialysis membranes were also studied in in vitro...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2002-12-01 00:00:00
abstract：:Hyperbaric oxygen treatment (HBO) could transiently reverse hypoxia during acute myocardial infarction (AMI). In order to evaluate whether early HBO can identify viable segments after AMI, improvement of wall motion score index (WMSI) after HBO was compared to dobutamine stress echocardiography (DSE). Thirty-one patie...
journal_title：General physiology and biophysics
pub_type： 临床试验,杂志文章
doi：
更新日期：2009-01-01 00:00:00
abstract：:Results of studies on the modulation of skeletal muscle contraction by phosphorylation of myosin regulatory light chains and by exchange of magnesium for calcium in myosin heads were reviewed. The polarized fluorescence method was used in these studies, and conformational changes of contractile proteins accompanying m...
journal_title：General physiology and biophysics
pub_type： 杂志文章,评审
doi：
更新日期：1991-06-01 00:00:00
abstract：:This study examines the effects of a 2.1-GHz WCDMA-modulated microwave (MW) radiation on apoptotic activity and mitochondrial membrane potential (ΔΨm) in MCF-7 cells. The cells were exposed to the MW at a specific absorption rate (SAR) of 0.528 W/kg for 4 or 24 h. The antiproliferative effect of MW exposure was determ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2016021
更新日期：2017-04-01 00:00:00
abstract：:Quercetin and epigallocatechin gallate are two of the most abundant polyphenols in dietary plants, including apples, onions, red wine and green tea. The bioactivity of polyphenols is linked to their ability to interact with cell membranes without being internalized. The aim of the present study was to assess the short...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2012_005
更新日期：2012-03-01 00:00:00
abstract：:The effect of K+ and Na+ on the properties of DNA aptamers that selective binds to fibrinogen (FIBRI) and heparin (HEPA) exosites of human alpha-thrombin was studied by circular dichroism (CD). The complexes of FIBRI-K+ were slightly more stable than HEPA-K+. However, lower stability was observed for HEPA-K+ at presen...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2008-12-01 00:00:00
abstract：:It is well known that in vitro storage lesions lead to membrane dysfunction and decreased number of functional erythrocytes. As erythrocytes get older, in storage media as well as in peripheral circulation, they undergo a variety of biochemical changes. In our study, the erythrocytes with different age groups in citra...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2016001
更新日期：2016-07-01 00:00:00
abstract：:Calcium ions mediate extracellular signals on intracellular processes. The signalling system based on transient rises or oscillations of the cytoplasmic calcium concentration has potential advantages. The relevant mechanisms of intracellular concentration changes include calcium-induced calcium release and calcium dep...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1991-10-01 00:00:00
abstract：:The voltage dependent ionic currents in cultured embryonic skeletal myocytes at stages of development ranging from 1 to 6 day were studied using the whole-cell patch clamp technique. Sodium (INa) and calcium (ICa) inward and potassium (IK) outward currents were observed at all stages. INa did not differ from that desc...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1993-06-01 00:00:00
abstract：:Manganese superoxide dismutase (MnSOD) is the major antioxidant in mitochondria that protect brain from neuroendocrine stress. Although MnSOD is localized in the mitochondria, the immediate subcellular distribution of MnSOD protein level in the prefrontal cortex and hippocampus of Wistar male rats exposed to acute str...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2009-01-01 00:00:00
abstract：:The postnatal developmental changes in mitochondrial uncoupling protein 1 (UCP 1) and F1-ATP synthase (ATPase) subunit levels in the interscapular brown adipose tissue (BAT) were studied in golden Syrian hamsters (Mesocricetus auratus) using electron microscopy in situ immunocytochemistry. The relatively low initial d...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2003-12-01 00:00:00
abstract：:We studied the involvement of O2, pH and low molecular thiols in H2S-induced decomposition of S-nitrosoglutathione (GSNO). The GSNO decomposition - •NO release was evaluated by UV-VIS spectroscopy and Griess assay. The H2S donor Na2S was used. O2 slightly increased, but was not necessary for the H2S-induced GSNO decom...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2013026
更新日期：2013-09-01 00:00:00
abstract：:A model of activation of muscle contraction has been proposed. It is based on calcium diffusion and binding to specific regulatory sites in a sarcomere. Calcium ions activate interactions of contractile proteins and thus the generation of force. The model quantifies the relation between calcium released from intracell...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1989-04-01 00:00:00
abstract：:A simple graphical method is proposed to distinguish between two-state and gradual alterations in DNA conformation from circular dichroic spectra. The method is advantageous particularly to identify two-state conformational isomerizations which exhibit low degree of cooperativity. The usefulness of the method is illus...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1986-08-01 00:00:00
abstract：:Sodium nitroprusside (SNP) is a nitric oxide (•NO) donor in vitro and in vivo. In this paper the time variation of the intracellular water proton nuclear magnetic resonance (NMR) effective relaxation time T'(2a) in SNP-treated human erythrocyte suspensions, containing 10 mM membrane impermeable paramagnetic MnCl2, has...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2010_04_373
更新日期：2010-12-01 00:00:00
abstract：:The upregulation of proprotein convertase subtilisin/kexin type 9 (PCSK9) was reported to be involved in regulating the levels of inflammatory markers and apoptosis in macrophages. This study aims to investigate the function and regulation of PCSK9 in myocardial ischaemia. The results of our study showed dramatically ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb-2019057
更新日期：2020-03-01 00:00:00
abstract：:Electron spin resonance spectroscopy (ESR) was used to study the effects of amphiphilic amines of the carbamate, amide, and ester type and amine oxide on the photosynthetic system of spinach chloroplasts. The ESR signal II connected to the photosynthetic center PS II donor side was observed to diminish in the presence...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1990-12-01 00:00:00
abstract：:Malate dehydrogenases (MDH, L-malate:NAD oxidoreductase, EC 1.1.1.37), catalyze the NAD/NADH-dependent interconversion of the substrates malate and oxaloacetate. This reaction plays a key part in the malate/aspartate shuttle across the mitochondrial membrane, and in the tricarboxylic acid cycle within the mitochondria...
journal_title：General physiology and biophysics
pub_type： 杂志文章,评审
doi：
更新日期：2002-09-01 00:00:00
abstract：:The distributions of K, Na, Mg and Ca within frog ovarian and oviductal oocytes were studied by electron probe wavelength dispersive X-ray microanalysis. An important heterogeneity could be found both in nuclear and jelly coated oocytes. The highest K, Mg and, to a lesser extent, Na concentrations were found in the pi...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1985-06-01 00:00:00
abstract：:Aiming at making the Münch model more adequate to the biological reality we introduce certain modifications and complements. Considering the model within the framework of so-called integrated system of long-distance water transport in plants we present a quantitative analysis based on the Kedem-Katchalsky formalism. A...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：2001-06-01 00:00:00
abstract：:125I-labelled o-iodobenzoate (OIB) was prepared by means of an isotopic exchange reaction; its distribution and excretion were determined and its pharmacokinetic parameters in rats were calculated. The calculated value of the half-life of OIB elimination was 38.7 +/- 0.7 min, the distribution volume was 278.2 +/- 53.5...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1983-08-01 00:00:00
abstract：:Thermal inactivation of peroxidase (POD) in an extract of Picea omorika (Pancić) Purkyne needles initiated by heat treatment was studied. This is the first study of this kind on a conifer species. Non-linear regression analysis was applied on the inactivation rate data, combining Mitscherlich and Arrhenius equations, ...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2009_01_78
更新日期：2009-03-01 00:00:00
abstract：:For characterization of Na(+),K(+)-ATPase, a key enzyme involved in maintenance of intracellular sodium homeostasis, expression of alpha1 subunit and the ATP- and Na(+)-binding properties were investigated by Western blot analysis and by enzyme kinetics, respectively. Previous studies documented time-dependent alterat...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2010_03_266
更新日期：2010-09-01 00:00:00
abstract：:Changes in the Young elasticity modulus in perpendicular direction to the membrane surface E perpendicular, in the coefficient of dynamic viscosity eta, in the electric capacitance C, in the surface charge U1, in the conductivity g and in the coefficient of non-linearity beta of current-voltage characteristic caused b...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1987-04-01 00:00:00
abstract：:The purpose of this study was to evaluate the effect of resveratrol on cytogenetic damages of iododeoxyuridine (IUdR) and x-ray megavoltage radiation (6 MV) in spheroid model of U87MG glioblastoma cancer cell line using clonogenic and alkaline comet assay. Cells were cultured as spheroids (350 µm) that were treated wi...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2014023
更新日期：2015-01-01 00:00:00
abstract：:Apoptosis (programmed cell death) is an important process participating in the formation of organs and tissues during embryogenesis. Our aim of the work is studying the role of the apoptosis during the human embryonic differentiation. We tend to give acquired findings into the correlation with expression of proteins B...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：
更新日期：1999-12-01 00:00:00
abstract：:Photon emissions were measured at ambient temperature (21°C) in complete darkness once per min from cultures of 10(6) cells during the 12 h following removal from 37°C. The energy of emission was about 10(-20) J/s/cell. Of 8 different cell lines, B16-BL6 (mouse melanoma cells) demonstrated the most conspicuous emissio...
journal_title：General physiology and biophysics
pub_type： 杂志文章
doi：10.4149/gpb_2011_03_301
更新日期：2011-09-01 00:00:00
