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2 edition of The effect of x-rays on the membrane permeability of human erythrocytes found in the catalog.

The effect of x-rays on the membrane permeability of human erythrocytes

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  • 4 Currently reading

Published .
Written in English

    Subjects:
  • Physics

  • Edition Notes

    Statementby Richard M. Garver and William L. Saylor
    ContributionsSaylor, William L., 1932-
    The Physical Object
    Paginationp. ;
    ID Numbers
    Open LibraryOL25167544M

    Taken together, the alveoli and capillary membranes form a respiratory membrane that is approximately mm thick. The respiratory membrane allows gases to cross by simple diffusion, allowing oxygen to be picked up by the blood for transport and CO 2 . After years of research, several different malaria vaccines will be available and licensed for use in humans. For infants and children in highly endemic regions of the world, an inexpensive, safe, and stable vaccine that gives long-lasting protection from death and severe clinical illness will be integrated into existing immunization programs. For nonimmune visitors to malarious areas . Membrane potential is a separation of opposite charges across the plasma membrane. 75 Membrane potential is due to differences in the concentration and permeability of key ions.


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The effect of x-rays on the membrane permeability of human erythrocytes by Richard M. Garver Download PDF EPUB FB2

VOL. 5 (I) BIOCmmCA ET BIOPHYSICA ACTA A STUDY OF THE EFFECT OF X-RAYS UPON THE ULTRASTRUCTURE OF THE ERYTHROCYTE MEMBRANE by J. ~.A~EK AND M. ROSENBERG Biological Institute o/the Medical Faculty o/the Masaryk University, Brno (Czechoslovakia) INTRODUCTION Many authors have already studied the effect of X-rays Cited by: It is now THE EFFECTS OF RADIATION ON CELL MEMBRANES 79 en Glucose E L 1 2 3 Preincubation time at 37°C,h Figure The increase in 2 2 Na uptake by human erythrocytes induced by R of*>'-radiation; the effect of preincubation at 37 °C in medium containing 2 g l _ 1 of glucose or 2-deoxyglucose as indicated.

2 2 Na uptake was then Cited by: Effects of X-rays on the permeability of erythrocytes to water and certain non-electrolytes Protoplasma vol page () Cite this article 43 Accesses.

Hence, this led to the strong effect of quinazoline derivative 18 as an antimalarial motif on human erythrocytes and on cell membrane molecular model (Rojas-Aguirre et al., ).

Likewise. Several SH compounds and their corresponding SH free control compounds were investigated for their radiation protection effect using alteration of permeability of the The effect of x-rays on the membrane permeability of human erythrocytes book membrane (swelling and potassium-sodium exchange) and the hemolysis caused by x rays.

As irradiation can damage The effect of x-rays on the membrane permeability of human erythrocytes book and membrane proteins by generation of reactive oxygen species, we investigated whether the membrane permeability, Na(+),K(+)-ATPase, and Ca(2+)-ATPase from red.

Effect of pipette and bath osmolarity on Cl− whole-cell currents of P. falciparum–infected human erythrocytes. Inhibition by hyperosmotic addition of sucrose to. INTRODUCTION.

Ionizing radiation (IR) has been extensively applied in research on microorganisms and eukaryotes over many decades. In investigations of the biological effects of various forms of radiation, carbon ion (CI) beams and X-rays have frequently been utilized as models of high–linear energy transfer (high-LET) and low–linear energy transfer (low-LET) Cited by:   Rojas-Aguirre Y, Hernández-Luis F, Mendoza-Martínez C, Sotomayor CP, Aguilar LF, et al.

() Effects of an antimalarial quinazoline derivative on human erythrocytes and on cell membrane molecular models. Biochim Biophys Acta – PubMed Cited by: 6. Abstract. Radiation damage can be produced The effect of x-rays on the membrane permeability of human erythrocytes book directly-ionizing radiation, such as α particles, β particles, protons, etc., indirectly by γ and x rays, which cause ejection of fast electrons from target atoms, as well as by neutrons which generate recoil protons and other nuclei.

In all cases the resulting charged particles excite or ionize other molecules in so-called “primary-events Cited by: A parallel beam of monochromatic x-rays (at an energy of 10 keV and a wavelength of nm) with a 1 mm × mm cross-section was directed perpendicular to the applied load. A high speed Pilatus detector was used for collecting SAXS data and a Quantum CCD X-ray detector (Area Detector Systems Corporation) was used for reading WAXD by: Start studying Effects of Radiation on Human Tissue and X-ray Film.

Learn vocabulary, terms, and more with flashcards, games, and other study tools. Human A&P Part 1 study guide by nightangel includes questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades. Permeability Permeability Blinks, L R School of Biological Sciences, Stanford University, California This review summarizes advances in the study of cellular per­ meability since the previous review of Jacobs (1).

The period covered is about three years, from mid to mid Impor­ tant papers, especially from Europe, have necessarily escaped. As ionizing radiation of the electromagnetic spectrum these puppies can be quite interesting.

These are the effects I can think of, off hand. Fluorescence 2. X-Rays cause certain substances to fluoresce, i.e. to emit light in the visible spe. Glutathione biosynthesis in The effect of x-rays on the membrane permeability of human erythrocytes book erythrocytes. Department of Internal Medicine, Washington University School of Medicine, J Clin Invest.

March; 50(3): – Abstract: The two enzymes required for de novo glutathione synthesis, glutamyl cysteine synthetase and glutathione synthetase, have been demonstrated in hemolysates of human. Osmotic permeability of H2O and D2O. Shown is the time course of volume change of AQP1-containing vesicles and control lipid vesicles on abrupt exposure to a do.

Lucke & Ricca found the permeability of the egg of the oyster' to diethylglycol and glycerol to be and X 10':"15 moles per sq.u per min. per mole per liter respectively (75).

Orskov (85) cal­ culated permeability constants of human erythrocytes on the sim­ plifying assumption that the Fick diffusion laws hold true.

According to an NCBI study, magnetic radiation from an MRI does have an effect on cells however the cells appear to recover quickly have the MRI machine is done. Here is an NCBI study on the biological effects of MRI radiation: Biological Effects.

An hydroxyl poisoning effect on the cell membrane results in a change in its permeability. Inactivation and release of enzymes is the primary result.

The unit of radiation dose is the rad which equals ergs of energy absorbed per gram of tissue. Influence of cholesterol derivatives on cytoskeletal organization of human carcinoma cells.

Ludes B, Schmit AC, Cremel G, Lambert AM, Hubert P, Jacqmin D, Bollack C, Staedel C. Am J Clin Nutr. Nov;66(5) Effect of cholesterol-rich diets with and without added vitamins E and C on the severity of atherosclerosis in rabbits.

Review. In the next sections, I will review the main discoveries that led to our current model of biological membranes: (1) the long path from the original assumptions about cell boundaries in the early Cell Theory to the first evidence that supported the existence of membranes; (2) early studies on cell membrane structure; (3) how evidence from permeability studies progressively Cited by: This is the main type of radiation therapy used for mesothelioma.

It uses x-rays from a machine outside the body to kill cancer cells. With newer techniques, for example, intensity-modulated radiation therapy (IMRT), doctors can treat mesotheliomas more accurately while reducing the radiation damage to nearby healthy tissues.

This might offer a. nn, Radiation effects on cells, tissues and organisms Radiation - Carcinogenesis initial medical and epidemiological observations n: Demonstration lines cancroides of the upper side of the hand, that developed after long-term exposure to diagnostic Size: 1MB.

Body temperature is usually about °C, but does vary during the day by about °C. The lowest daily temperature is when the person is asleep. Temperature receptors are found in the skin, the great veins, the abdominal organs and the hypothalamus.

While the ones in the skin provide the sensation of coldness, the hypothalamic (central core. RADIATION BIOLOGY Radiation biology is the study of the effects of ionizing radiation on living systems. RADIATION • Radiation, as defined as the emission and propagation of energy through space or a substance in the form of waves or particles.

• IONIZING RADIATION • NON-IONIZING RADIATION 6. Advances in Biological and Medical Physics, Volume 13 covers articles on the advances in biological and medical physics. The book presents papers on the solid-state physics of electron and ion transport in biology; on microelectrophoretic studies on the surface chemistry of erythrocytes; and on a specific common chromosomal pathway for the origin of human Book Edition: 1.

External radiation therapy uses a large machine and special equipment to carefully aim the right amount of radiation at cancerous tumors.

With internal radiation therapy, doctors inject or implant a radioactive substance into the area with the tumor or cancer cells. In some cases, the patient. Biology in Physics is a radical new book which bridges the gap between biology and physics.

The aim is to promote an interdisciplinary exchange of scientific information and ideas, in order to stimulate cooperation in research. The scope of this volume explores both the concepts and techniques of biophysics and illustrates the latest advances.

CONTENTS Figures vii Tables xiii Foreword xxi Acknowledgments xxiii Abstract xxv 1. Summary 1 Discussion of Findings 1 Chemical and Physical Properties and Analytical Techniques 1 Environmental Occurrence 2 Environmental Cycling and Fate 3 Biological Aspects in Microorganisms 4 Biological Aspects in Plants 5 Biological.

- Sparsely ionizing radiations such as x-rays or gamma- rays induce damage mainly through indirect effect while densely ionizing radiations such as neutrons and alpha particles cause damage primarily through direct effect - Indirect effects can be altered with use of radioprotectors during radiotherapy while direct not Summary: In order to assess total magnesium concentrations in human red blood cells (erythrocytes--ErMg), atomic absorption spectrometry (AAS) provides high accuracy and precise method rapid and amenable to automation.

Taking care of eliminating the chronic marginal magnesium deficits, normal values of ErMg evaluated through a direct method and expressed.

ABSTRACT BOOK Graduate Programs in the membrane permeability under specific physiological and pathological situations or form a jap junction (GJ) by docking with an apposing hemichannel on an adjacent factor in hantavirus entry into human cells.

EMC4 is a ER‐membrane complex protein of unknown. For X rays produced by voltages of to kVp the general effect on the dose to a soft tissue element near bone is to increase the energy absorption to a value higher than would be expected in similar soft tissue remote from bone.

This effect is attributed to the different attenuation coefficients of bone and soft tissue in the.

This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Human erythrocytes were chosen because they are the cells most exposed to oxidative risk, since their specific role is to carry oxygen. The main target of H2O2 is Hb, which is oxidised to methaemoglobin.

Exposure of erythrocytes to H2O2 also causes lipid peroxidation, and alterations in proteins, for example the formation of carbonyl dimers. Most necrosis results from loss of blood supply to part of the body. Hypoxia is the inability to carry out oxidative phosphorylation.

Coagulation necrosis retains the outlines of the cells. Liquefaction necrosis is usual following total loss of blood to the brain, or when neutrophils digest tissue as in most bacterial infections.

Caseous necrosis is crumbling of tissue, and is most familiar in. In the Jagetia GC et al. study, the researchers studied the protective effect of a hydroalcoholic extract of ginger in mice against whole-body x-rays. In the Jagetia GC et al.

study, mice were given 10 mg/kg of the ginger extract for five days before being exposed to full body x-rays in amounts ranging from Gy of gamma radiation.

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Cell death occurs spontaneously in normally involuting tissues such as the thymus. It can be initiated or inhibited by a variety of environmental stimuli, both physiological and pathological.

Cell death even occurs in some of the cells of untreated malignant tumours, and it is seen during tumour regression induced by X rays or cytotoxic agents. Full text of "An atlas of radiation histopathology" See other formats.Study Guide for Understanding Pathophysiology This page intentionally left blank Study Download pdf for Understanding Pathophysiology Sue E.

Huether, MSN, PhD Professor Emeritus College of Nursing University of Utah Salt Lake City, Utah Kathryn L. McCance, MSN, PhD Professor College of Nursing University of Utah Salt Lake City, Utah Section Editors Valentina L.

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