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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Supercritical fluids. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (764 pages)
    Edition: 1st ed.
    ISBN: 9780080931302
    Series Statement: Issn Series ; v.Volume 4
    DDC: 660.2842
    Language: English
    Note: Front Cover -- Introduction to Supercritical Fluids: A Spreadsheet-based Approach -- Copyright -- Contents -- List of Examples -- List of Tip Boxes -- Foreword -- Preface -- Tip Box #1. Instruction to Multidisciplinary Classes -- Tip Box #2. Instruction to Specialized Discipline Classes (Chemical-Related Fields) -- Tip Box #3. eBooks and MS Office -- Chapter 1: Chemical Vocabulary and Essentials -- 1.1. Philosophy of the Text -- Examples for Supercritical CO2 -- Examples for Supercritical H2O -- 1.2. Organization of the text -- 1.3. Basic Words -- Process and System -- What questions arise when considering this process? -- Solids, Liquids, Gases and Vapors -- State and Phase -- Temperature -- Pressure -- Density and Specific Volume -- Physical Properties -- Intensive Properties and Extensive Properties -- Physical Property Diagrams -- Phase Diagrams -- P-T Phase Diagram of CO2 -- Using a P-T Phase Diagram -- P-ρ Phase Diagram of CO2 -- Using a P-ρ Phase Diagram -- Phase Mass Fraction of a Two-Phase System -- Projection of Equilibrium Curves on a P-T Diagram -- Visualization of the P-ρ -T Phase Diagram of CO2 -- Concept of Path -- Energy Content of a System: The Internal Energy, U -- Obtaining Values of the Internal Energy -- Properties for Energy: Enthalpy, H and Entropy, S -- T-S Phase Diagram of CO2 -- P-T Phase Diagram of H2O -- P-ρ Phase Diagram of H2O -- Visualization of the P-ρ -T Phase Diagram of H2O -- T-S Phase Diagram of H2O -- 1.4. Some Notes on Pressure -- 1.5. Chapter Summary -- 1.6 Suggested Reading and References -- General chemical information and education -- Wikipedia selections -- References -- Phase diagrams [SL] -- Physical chemistry [PC] -- Thermodynamic problems [TP] -- 1.7. End of the Chapter Problems -- Tip Box#1 Chapter objectives -- Tip Box#2 The tip box -- Tip Box#3 Units and dimensions. , Tip Box#4 Common units definitions -- Tip Box#5 Types of systems -- Tip Box#6 Intensive and extensive properties -- Example 1.1 Expansion of water in a 3-L thermo hot pot -- Tip Box#7 Critical point of a pure substance -- Example 1.2 Initial and final pressure of a vessel containing CO2 -- Tip Box#8 Phase mass fractions -- Example 1.3 Determination of the mass fraction of a mixed phase system -- Example 1.4 Liquid contained in a compressed gas cylinder -- Tip Box#9 Compressibility factor of a pure substance -- Example 1.5 Location of paths on P-T and P-r phase diagrams -- Example 1.6 Visualization of paths on phase diagram -- Example 1.7 Energy requirements for heating a batch reactor -- Example 1.8 Energy requirements for heating a batch reactor with phase change -- Example 1.9 Energy required to vaporize liquid CO2 from the T-S diagram -- Chapter 2: Systems, Devices and Processes -- 2.1. Material, Energy, and Entropy Balances -- Material Balance -- Energy Balance -- Sign of Q and W -- Form of Energy Balance for Mixing of Streams -- Entropy Balance -- 2.2. Analysis of Devices and Processes -- Batch Reactor or Pressurized Vessel -- Variable Volume Batch Vessel or Reactor -- Turbine or Expander -- Pump or Compressor -- Operational Differences Between Pumps and Compressors -- Valves -- Heat Exchanger -- 2.3. Practical Process I: Transcritical CO2 System for Heating hot Water -- Coefficient of Performance (COP) -- 2.4. Practical Process II: Flavor Extraction with Supercritical CO2 -- Extractor Conditions -- 2.5. Practical Process III: Fine Particle Formation with Supercritical H2O -- Mixing Tee -- Plug Flow Tubular Reactor -- 2.6. Chapter Summary -- 2.7 Suggested Reading and References -- References -- Heat pumps [HP] -- Materials Synthesis [MS] -- Supercritical Fluid Extraction [SFE] -- Supercritical fluids -- Undergraduate texts. , 2.8. End of the Chapter Problems -- 2.9. End of the Chapter Projects -- 2.10. Report Format -- Tip Box#1 Chapter objectives -- Tip Box#2 Steps for analyzing systems with balances -- Example 2.1 Adiabatic mixing of streams at atmospheric pressure -- Tip Box#3 Using excel workbooks -- Example 2.2 Entropy generation and lost work for adiabatic mixing -- Tip Box#4 Independent variables of devices and processes -- Example 2.3 Energy production from a turbine -- Example 2.4 Energy requirements and temperature rise for compressing liquid CO2 -- Example 2.5 Energy requirements and temperature rise for compressing vapor CO2 -- Example 2.6 Depressurization of CO2 through a control valve -- Example 2.7 Depressurization of CO2 through a valve into the two-phase region -- Tip Box#5 Heat exchangers -- Example 2.8 Design of an air-water heat exchanger for hot water in the home -- Example 2.9 Design of a CO2 transcritical heat exchanger for making hot water -- Example 2.10 Design of an evaporator for liquid carbon dioxide -- Example 2.11 Solubility of paprika oleoresin in supercritical CO2 -- Example 2.12 Design of a process for supercritical carbon dioxide extraction of paprika oleoresin -- Example 2.13 Fine particle products from Fe(NO3)3 in supercritical water -- Example 2.14 Mixing tee conditions for a supercritical water particle formation process -- Example 2.15 Space time for a supercritical water reactor -- Example 2.16 Increase of reactor space time with pressure for a supercritical water reactor -- Chapter 3: Chemical Information and Know-How -- 3.1. Sources of Chemical Information -- ChemSpider -- EPI Suite -- Jmol and Symyx Draw-Chemical Structures -- Accelrys Draw -- Wikipedia -- 3.2. Chemical Property Databases -- NIST Chemistry WebBook -- REFPROP -- Thermofluids -- PROPATH -- 3.3. Chemical Property Databases: Nonreference Substances. , NIST Chemistry WebBook -- ThermoLit -- Beilstein/Reaxys -- SpringerMaterials-The Landolt-Börnstein Database -- DETHERM and CHEMSAFE -- INFOTHERM -- ILThermo -- DIPPR Database -- NIST Data Gateway -- AIST RIO-DB -- 3.4. Chemical Literature Databases -- Chemical Societies -- Commercial Databases -- SciFinder -- Scopus -- Beilstein/Reaxys -- SpringerMaterials-The Landolt-Börnstein Database -- SciDirect -- ISI Web of Science -- Google Scholar -- Scirus -- Open Access Journals -- Patent Databases -- 3.5. Bibliometrics -- Science Citation Index -- Impact Factor -- Author h-Index and Journal H-Index -- Journal Immediacy Index -- Cautions on Bibliometrics -- New Journal metrics SNIP and SJR -- 3.6. Chapter Summary -- 3.7 Suggested Additional Reading and References -- Impact Factor [IF] -- Official Web Site for the Properties of Water and Steam -- Overview of ChemSpider -- Overview of ILThermo Database -- Overview of ThermoLit -- Physical Properties for Many Substances Conveniently Presented in Tables and Correlation Equations -- Source Normalized Impact per Paper [SNIP] -- Texts Used in EPI Suite Program MPBPWIN -- 3.8. End of the Chapter Problems -- Tip Box#1 Chapter objectives -- Tip Box#2 How to use this chapter -- Example 3.1 Determine the chemical structure, SMILES formula, and basic physical properties of erythromycin -- Tip Box#3 ChemSpider -- Example 3.2 Estimate the sublimation pressure of erythromycin at 60 °C -- Example 3.3 Draw an editable chemical structure of erythromycin -- Tip Box#4 NIST Chemistry WebBook -- Example 3.4 Tabulate the thermophysical properties of CO2 at 60 °C from 0.0 to 30 MPa in 2 MPa increments -- Example 3.5 Locate some solubility data for the system CO2 and biphenyl -- Example 3.6 Determine whether solubility data have been reported for carbon dioxide and erythromycin. , Example 3.7 For dodecylbenzene, determine whether vapor pressure data exists -- Example 3.8 Determine the data that are available for 1-butyl-3- ethylimidazolium chloride, [bmim][Cl] -- Example 3.9 Determine the data that are available for 1-butyl-3- methylimidazolium chloride, [bmim][Cl], as a binary mixtu ... -- Tip Box#5 NIST Data Gateway -- Tip Box#6 Bibliometrics -- Example 3.10 Determine the most highly-cited research paper with the keyword "supercritical fluids" -- Tip Box#7 Tracing research threads with references and citations -- Example 3.11 Tracing a research thread -- Tip Box#8 Self-citation -- Tip Box#9 Citations and downloads -- Chapter 4: Historical Background and Applications -- 4.1. Historical Background -- 4.2. Characteristic Properties Common to All Supercritical Fluids -- Pure Substance -- Mixtures -- 4.3. Extraction with Supercritical CO2 -- Natural Product Categories and Essential Points for Extraction -- ABC List of Plant Materials -- Coffee Decaffeination -- Promotion of Caffeine Mass Transfer -- Retainment of Flavor Compounds -- Fractionation -- Hops Extraction -- 4.4. Commercial Food Products -- Decaffeinated Coffee -- Decaffeinated Tea -- Food-Grade/Refined Oils -- Hops Resins -- Pigments -- Powdered Foods -- Rice -- 4.5. Methods for Improving Yield and Modifying Selectivity -- Co-solvents -- Co-extractants -- 4.6. Dietary Supplements -- 4.7. Green Chemistry with Supercritical CO2 -- Atom Efficiency -- Hydrogenation and Oxidation -- Hydroformylation -- Carbonation -- 4.8. Polymer Synthesis -- Free Radical Polymerization -- Dispersion Polymerization -- 4.9. Separations -- Ternary Diagrams -- Ternary Phase Diagrams -- Lever Rule and Inverse Lever Rule -- Dehydration -- Deasphalting -- 4.10. Characteristic Features of Water -- Overview -- Ionization Constant Kw -- Relative Permittivity εr -- Hydrogen Bonding. , Ionic Solubility.
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  • 2
    Keywords: Political geography - China. ; Electronic books.
    Description / Table of Contents: This book brings together a selection of essays by Richard J. Smith, one of the foremost scholars of Chinese intellectual and cultural history. Mapping China and Managing the World focuses on Chinese constructions of order and examines the most important ways in which elites in late imperial China sought to order their vast and variegated world, and will be welcomed by Chinese and East Asian historians, as well as those interested more broadly in the culture of China and East Asia.
    Type of Medium: Online Resource
    Pages: 1 online resource (288 pages)
    Edition: 1st ed.
    ISBN: 9781136209222
    Series Statement: Asia's Transformations/Critical Asian Scholarship Series
    DDC: 526.0951
    Language: English
    Note: Cover -- MAPPING CHINA AND MANAGING THE WORLD -- Title Page -- Copyright Page -- Table of Content -- List of figures -- Preface and acknowledgements -- Note on the cover -- Introduction -- 1 The languages of the Yijing and the representation of reality -- 2 Mapping China's world: cultural cartography in late imperial China -- 3 Ritual in Qing culture -- 4 The teachings of ritual and the rectification of customs: echos of tradition in the political culture of modern China -- 5 Divination in the Qing -- 6 Jesuit interpretations of the Yijing in global perspective -- Notes -- Bibliography -- Index.
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  • 3
    Publication Date: 2014-06-25
    Description: wo commonly used proxies based on the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) are the TEX86 (TetraEther indeX of 86 carbon atoms) paleothermometer for sea surface temperature reconstructions and the BIT (Branched Isoprenoid Tetraether) index for reconstructing soil organic matter input to the ocean. An initial round-robin study of two sediment extracts, in which 15 laboratories participated, showed relatively consistent TEX86 values (reproducibility ±3–4°C when translated to temperature) but a large spread in BIT measurements (reproducibility ±0.41 on a scale of 0–1). Here we report results of a second round-robin study with 35 laboratories in which three sediments, one sediment extract, and two mixtures of pure, isolated GDGTs were analyzed. The results for TEX86 and BIT index showed improvement compared to the previous round-robin study. The reproducibility, indicating interlaboratory variation, of TEX86 values ranged from 1.3 to 3.0°C when translated to temperature. These results are similar to those of other temperature proxies used in paleoceanography. Comparison of the results obtained from one of the three sediments showed that TEX86 and BIT indices are not significantly affected by interlaboratory differences in sediment extraction techniques. BIT values of the sediments and extracts were at the extremes of the index with values close to 0 or 1, and showed good reproducibility (ranging from 0.013 to 0.042). However, the measured BIT values for the two GDGT mixtures, with known molar ratios of crenarchaeol and branched GDGTs, had intermediate BIT values and showed poor reproducibility and a large overestimation of the “true” (i.e., molar-based) BIT index. The latter is likely due to, among other factors, the higher mass spectrometric response of branched GDGTs compared to crenarchaeol, which also varies among mass spectrometers. Correction for this different mass spectrometric response showed a considerable improvement in the reproducibility of BIT index measurements among laboratories, as well as a substantially improved estimation of molar-based BIT values. This suggests that standard mixtures should be used in order to obtain consistent, and molar-based, BIT values.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 4
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry Geophysics Geosystems 10 (2009): Q03012, doi:10.1029/2008GC002221.
    Description: Recently, two new proxies based on the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) were proposed, i.e., the TEX86 proxy for sea surface temperature reconstructions and the BIT index for reconstructing soil organic matter input to the ocean. In this study, fifteen laboratories participated in a round robin study of two sediment extracts with a range of TEX86 and BIT values to test the analytical reproducibility and repeatability in analyzing these proxies. For TEX86 the repeatability, indicating intra-laboratory variation, was 0.028 and 0.017 for the two sediment extracts or ±1–2°C when translated to temperature. The reproducibility, indicating among-laboratory variation, of TEX86 measurements was substantially higher, i.e., 0.050 and 0.067 or ±3–4°C when translated to temperature. The latter values are higher than those obtained in round robin studies of Mg/Ca and U37 k′ paleothermometers, suggesting the need to primarily improve compatibility between labs. The repeatability of BIT measurements for the sediment with substantial amounts of soil organic matter input was relatively small, 0.029, but reproducibility was large, 0.410. This large variance could not be attributed to specific equipment used or a particular data treatment. We suggest that this may be caused by the large difference in the molecular weight in the GDGTs used in the BIT index, i.e., crenarchaeol versus the branched GDGTs. Potentially, this difference gives rise to variable responses in the different mass spectrometers used. Calibration using authentic standards is needed to establish compatibility between labs performing BIT measurements.
    Keywords: TEX86 ; BIT ; Round robin ; HPLC/MS
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 5
    Publication Date: 2022-05-25
    Description: Author Posting. © American Meteorological Society 2006. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 19 (2006): 2122–2143, doi:10.1175/JCLI3761.1.
    Description: The Community Climate System Model version 3 (CCSM3) has recently been developed and released to the climate community. CCSM3 is a coupled climate model with components representing the atmosphere, ocean, sea ice, and land surface connected by a flux coupler. CCSM3 is designed to produce realistic simulations over a wide range of spatial resolutions, enabling inexpensive simulations lasting several millennia or detailed studies of continental-scale dynamics, variability, and climate change. This paper will show results from the configuration used for climate-change simulations with a T85 grid for the atmosphere and land and a grid with approximately 1° resolution for the ocean and sea ice. The new system incorporates several significant improvements in the physical parameterizations. The enhancements in the model physics are designed to reduce or eliminate several systematic biases in the mean climate produced by previous editions of CCSM. These include new treatments of cloud processes, aerosol radiative forcing, land–atmosphere fluxes, ocean mixed layer processes, and sea ice dynamics. There are significant improvements in the sea ice thickness, polar radiation budgets, tropical sea surface temperatures, and cloud radiative effects. CCSM3 can produce stable climate simulations of millennial duration without ad hoc adjustments to the fluxes exchanged among the component models. Nonetheless, there are still systematic biases in the ocean–atmosphere fluxes in coastal regions west of continents, the spectrum of ENSO variability, the spatial distribution of precipitation in the tropical oceans, and continental precipitation and surface air temperatures. Work is under way to extend CCSM to a more accurate and comprehensive model of the earth's climate system.
    Description: We would like to acknowledge the substantial contributions to and support for the CCSM project from the National Science Foundation (NSF), the Department of Energy (DOE), the National Oceanic and Atmospheric Administration, and the National Aeronautics and Space Administration.
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 6
    Publication Date: 2022-05-26
    Description: Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry, Geophysics, Geosystems 14 (2013): 5263–5285, doi:10.1002/2013GC004904.
    Description: Two commonly used proxies based on the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) are the TEX86 (TetraEther indeX of 86 carbon atoms) paleothermometer for sea surface temperature reconstructions and the BIT (Branched Isoprenoid Tetraether) index for reconstructing soil organic matter input to the ocean. An initial round-robin study of two sediment extracts, in which 15 laboratories participated, showed relatively consistent TEX86 values (reproducibility ±3–4°C when translated to temperature) but a large spread in BIT measurements (reproducibility ±0.41 on a scale of 0–1). Here we report results of a second round-robin study with 35 laboratories in which three sediments, one sediment extract, and two mixtures of pure, isolated GDGTs were analyzed. The results for TEX86 and BIT index showed improvement compared to the previous round-robin study. The reproducibility, indicating interlaboratory variation, of TEX86 values ranged from 1.3 to 3.0°C when translated to temperature. These results are similar to those of other temperature proxies used in paleoceanography. Comparison of the results obtained from one of the three sediments showed that TEX86 and BIT indices are not significantly affected by interlaboratory differences in sediment extraction techniques. BIT values of the sediments and extracts were at the extremes of the index with values close to 0 or 1, and showed good reproducibility (ranging from 0.013 to 0.042). However, the measured BIT values for the two GDGT mixtures, with known molar ratios of crenarchaeol and branched GDGTs, had intermediate BIT values and showed poor reproducibility and a large overestimation of the “true” (i.e., molar-based) BIT index. The latter is likely due to, among other factors, the higher mass spectrometric response of branched GDGTs compared to crenarchaeol, which also varies among mass spectrometers. Correction for this different mass spectrometric response showed a considerable improvement in the reproducibility of BIT index measurements among laboratories, as well as a substantially improved estimation of molar-based BIT values. This suggests that standard mixtures should be used in order to obtain consistent, and molar-based, BIT values.
    Description: S.S. thanks the Netherlands Organisation for Scientific Research (NWO) for financial support through a VICI grant and Jaap van der Meer for advice and support on the statistical analysis. A.P. thanks Susan Carter for laboratory assistance and NSF-OCE for funding. A.R.M. thanks Jordi Coello and N uria Moraleda for advice and support on the statistical analysis and Spanish Ministry for research and innovation (MICIIN) for funding. V.G. thanks Xavier Philippon and Carl Johnson for technical assistance. K.G. and M.W. thank the Australian Research Council and John de Laeter Centre for funding toward the LC-MS system, and ARC Fellowship awarded to K.G. C.L.Z. thanks the State Key Laboratory of Marine Geology and the Chinese ‘‘National Thousand Talents’’ program for supporting the LC-MS work performed at Tongji University.
    Description: 2014-06-20
    Keywords: TEX86 ; BIT ; GDGT ; Round robin
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: text/plain
    Format: application/msword
    Format: application/pdf
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  • 7
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    Elsevier
    In:  Journal of the Taiwan Institute of Chemical Engineers, 44 (4). pp. 517-537.
    Publication Date: 2020-09-18
    Description: Replacement reactions in clathrate hydrates, for which CO2 is used to replace methane gas trapped in inclusion compounds in the deep sea or permafrost areas, have gained growing attention as a possible method to sequester CO2 and recover natural gas. This review examines research progress in the replacement reactions and analytical methods with special focus on laboratory studies. Methane hydrate dissociation enthalpies, carbon dioxide hydrate dissociation enthalpies, methane hydrate thermal conductivities and thermal diffusivities are tabulated. Methods used to study the CH4–CO2 replacement reaction include material balance (MB), MB with particle size analyzer, MB and Raman, NMR, and magnetic resonance imaging. New analytical methods such as thermo-Raman should be explored in the future to develop a localized picture of the microscopic replacement mechanism including water molecule movement. Combination of these data with molecular simulations will allow new macroscopic models to be developed for use with practical processes for unconventional natural gas.
    Type: Article , PeerReviewed
    Format: text
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  • 8
    Publication Date: 2013-01-29
    Description: Background: High density (HD) SNP genotyping arrays are an important tool for genetic analyses of animals and plants. Although the chicken is one of the most important farm animals, no HD array is yet available for high resolution genetic analysis of this species. Results: We report here the development of a 600 K Affymetrix(R) Axiom(R) HD genotyping array designed using SNPs segregating in a wide variety of chicken populations. In order to generate a large catalogue of segregating SNPs, we re-sequenced 243 chickens from 24 chicken lines derived from diverse sources (experimental, commercial broiler and layer lines) by pooling 10--15 samples within each line. About 139 million (M) putative SNPs were detected by mapping sequence reads to the new reference genome (Gallus_gallus_4.0) of which ~78 M appeared to be segregating in different lines. Using criteria such as high SNP-quality score, acceptable design scores predicting high conversion performance in the final array and uniformity of distribution across the genome, we selected ~1.8 M SNPs for validation through genotyping on an independent set of samples (n = 282). About 64% of the SNPs were polymorphic with high call rates (〉98%), good cluster separation and stable Mendelian inheritance. Polymorphic SNPs were further analysed for their population characteristics and genomic effects. SNPs with extreme breach of Hardy-Weinberg equilibrium (P 〈 0.00001) were excluded from the panel. The final array, designed on the basis of these analyses, consists of 580,954 SNPs and includes 21,534 coding variants. SNPs were selected to achieve an essentially uniform distribution based on genetic map distance for both broiler and layer lines. Due to a lower extent of LD in broilers compared to layers, as reported in previous studies, the ratio of broiler and layer SNPs in the array was kept as 3:2. The final panel was shown to genotype a wide range of samples including broilers and layers with over 100 K to 450 K informative SNPs per line. A principal component analysis was used to demonstrate the ability of the array to detect the expected population structure which is an important pre-investigation step for many genome-wide analyses. Conclusions: This Affymetrix(R) Axiom(R) array is the first SNP genotyping array for chicken that has been made commercially available to the public as a product. This array is expected to find widespread usage both in research and commercial application such as in genomic selection, genome-wide association studies, selection signature analyses, fine mapping of QTLs and detection of copy number variants.
    Electronic ISSN: 1471-2164
    Topics: Biology
    Published by BioMed Central
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  • 9
    Publication Date: 2013-02-06
    Description: Background: Pre-eclampsia/eclampsia is one of the most common causes of maternal and perinatal morbidity and mortality in low and middle income countries. Magnesium sulfate is the drug of choice for prevention of seizures as part of comprehensive management of the disease. Despite the compelling evidence for the effectiveness of magnesium sulfate, concern has been expressed about its safety and potential for toxicity, particularly among providers in low- and middle-income countries. The purpose of this review was to determine whether the literature published in these global settings supports the concerns about the safety of use of magnesium sulfate. Methods: An integrative review of the literature was conducted to document the known incidences of severe adverse reactions to magnesium sulphate, and specific outcomes of interest related to its use. All types of prospective clinical studies were included if magnesium sulfate was used to manage pre-eclampsia or eclampsia, the study was conducted in a low- or middle-income country, and the study included the recording of the incidence of any adverse side effect resulting from magnesium sulfate use. Results: A total of 24 studies that compared a magnesium sulfate regimen against other drug regimens and examined side effects among 34 subject groups were included. The overall rate of absent patellar reflex among all 9556 aggregated women was 1.6%, with a range of 0-57%. The overall rate of respiratory depression in 25 subject groups in which this outcome was reported was 1.3%, with a range of 0--8.2%. Delay in repeat administration of magnesium sulfate occurred in 3.6% of cases, with a range of 0-65%. Calcium gluconate was administered at an overall rate of less than 0.2%. There was only one maternal death that was attributed by the study authors to the use of magnesium sulfate among the 9556 women in the 24 studies. Conclusion: Concerns about safety and toxicity from the use of magnesium sulfate should be mitigated by findings from this integrative review, which indicates a low incidence of the most severe side effects, documented in studies that used a wide variety of standard and modified drug regimens. Adverse effects of concern to providers occur infrequently, and when they occurred, a delay of repeat administration was generally sufficient to mitigate the effect. Early screening and diagnosis of the disease, appropriate treatment with proven drugs, and reasonable vigilance for women under treatment should be adopted as global policy and practice.
    Electronic ISSN: 1471-2393
    Topics: Medicine
    Published by BioMed Central
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  • 10
    Publication Date: 2012-04-20
    Description: Using the mitochondria-targeted ratiometric mass spectrometry probe MitoB to measure H2O2 in living Drosophila Nature Protocols 7, 946 (2012). doi:10.1038/nprot.2012.035 Authors: Helena M Cochemé, Angela Logan, Tracy A Prime, Irina Abakumova, Caroline Quin, Stephen J McQuaker, Jigna V Patel, Ian M Fearnley, Andrew M James, Carolyn M Porteous, Robin A J Smith, Richard C Hartley, Linda Partridge & Michael P Murphy The role of hydrogen peroxide (H2O2) in mitochondrial oxidative damage and redox signaling is poorly understood, because it is difficult to measure H2O2in vivo. Here we describe a method for assessing changes in H2O
    Print ISSN: 1754-2189
    Electronic ISSN: 1750-2799
    Topics: Natural Sciences in General
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