Photochemical Dissolution of Goethite in Acid/Oxalate Solution

1987 ◽  
Vol 35 (5) ◽  
pp. 347-352 ◽  
Author(s):  
R. M. Cornell
Keyword(s):  
Oxalate Solution

scholarly journals Characteristics of Interlayer Materials in Non-Allophanic Volcanic Ash and Red Yellow Soils from Japan

2005 ◽  
Vol 5 (1) ◽  
pp. 1-23
Author(s):  
Anabella Tulin ◽  
Keyword(s):  
Iron Oxides ◽  
Volcanic Ash ◽  
Sodium Citrate ◽  
Citrate Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Extractions ◽  
Oxalate Solution

The characteristics and properties of interlayer materials from 10 non-allophanic (Melanudand) and red yellow soils (Alfisols and Ultisols) from three locations in Japan were studied by chemical extractions and x-ray diffraction (XRD) analyses. Allophane was dissolved from clay samples using 0.15 M acid oxalate solution while silicon and aluminum were dissolved using both 0.15 M acid oxalate and 0.3 M sodium citrate solutions. XRD analyses were done for the treated and untreated samples. For the chemically extracted samples, the clay samples were treated with bicarbonate citrate solution for the removal of iron oxides after the dissolution treatments then saturated with K and Mg ions for XRD analyses. Results of the XRD patternd of the untreated and treated samples indicated the interlayer materials as a hydroxy-interlayered form for vermiculite (HIV). Between the two dissolution treatments, the 0.3 M sodium citrate treatment was found to be more effective in removing the interlayer materials than the 0.15 M acid oxalate treatment by allowing interlayer expansion and collapse.

Activation of the blood fibrinolytic enzyme system by platelets

1964 ◽  
Vol 206 (6) ◽  
pp. 1255-1261 ◽  
Author(s):  
W. O. Reid ◽  
M. J. Silver
Keyword(s):  
Fibrinolytic Activity ◽  
Room Temperature ◽  
Enzyme System ◽  
Platelet Rich Plasma ◽  
Venous Blood ◽  
Aminocaproic Acid ◽  
Clot Retraction ◽  
Oxalate Solution ◽  
Epsilon Aminocaproic Acid ◽  
Inhibitor Of Plasminogen Activator

Fibrinolytic activity in human blood develops after the occurrence of viscous metamorphosis (VM) of platelets. Freshly drawn venous blood was held at room temperature until spontaneous VM of platelets occurred and then introduced into oxalate solution to prevent coagulation. As compared to the control (blood added to anticoagulant before VM) plasma of such samples exhibited increased fibrinolytic activity, detected by increased serial thrombin times. Clots from platelet-rich plasma exhibited an increase in the convergence of branches of the thrombelastograph and a decrease in weight after incubation for 24 hr or more. The increase in branch convergence was roughly proportional to the platelet count and was reduced or absent in thrombocytopenic blood or platelet-poor plasma. Dimethylsulfoxide blocked VM and prevented branch convergence (without preventing clot retraction). Epsilon-aminocaproic acid, an inhibitor of plasminogen activator, blocked or inhibited fibrinolytic activity without arresting VM. This evidence suggests that platelets contain significant proactivator or activator of plasminogen (or a factor which initiates their activity) which is released when VM occurs.

The Stability of an 0.01NSodium Oxalate Solution.

1923 ◽  
Vol 15 (2) ◽  
pp. 149-149
Author(s):  
Edward S. Hopkins
Keyword(s):  
Oxalate Solution ◽  
The Stability

scholarly journals The Location of Muscle Calcium with Respect to the Myofibrils

1965 ◽  
Vol 48 (6) ◽  
pp. 997-1002 ◽  
Author(s):  
Saul Winegrad
Keyword(s):  
Skeletal Muscle ◽  
Longitudinal Distribution ◽  
Oxalate Solution ◽  
Muscle Calcium

Autoradiographs have been prepared from frog toe muscles soaked in Ca45 and fixed with an osmium-oxalate solution. A majority of the grains over the A bands were over the myofibrils. The grain density over the I bands was greatest over the space between the myofibrils. The significance of this distribution is discussed in the light of previous information about the longitudinal distribution of Ca45 in skeletal muscle.

scholarly journals Electrolytic analysis of metals in oxalate solution

1963 ◽  
Vol 12 (9) ◽  
pp. 804-807
Author(s):  
Masao TANAKA
Keyword(s):  
Oxalate Solution

Thermal stability of nanometer-sized NiO and Sm-doped ceria powders

2002 ◽  
Vol 17 (9) ◽  
pp. 2266-2274 ◽  
Author(s):  
Yoshihiro Okawa ◽  
Toshitatsu Matsumoto ◽  
Toshiya Doi ◽  
Yoshihiro Hirata
Keyword(s):  
Primary Particle ◽  
Solid Oxide ◽  
Cubic Phase ◽  
Particle Sizes ◽  
Doped Ceria ◽  
Secondary Particles ◽  
Surface Areas ◽  
Cerium Oxalate ◽  
Oxalate Solution ◽  
Thermal Stability Of

A fine NiO powder and a Sm-doped ceria powder with a composition of Ce0.8Sm0.2O1.9 were synthesized by heating the oxalate precursors at 300–1200 °C in air to produce a cermet (anode material) for solid oxide fuel cell. A 0.2 M Ni(NO3)2 solution and a 0.2 M Ce(NO3)3–Sm(NO3)3 solution were mixed with 0.4 M oxalate solution, respectively, to produce the oxalate precursors. Only the cubic phase of Ce0.8Sm0.2O1.9 was formed in the calcined powders from the Sm-doped cerium oxalate. However, the mixed phases of NiO and Ni were produced in the NiO precursor after the calcination at 300–600 °C. At higher temperatures, only NiO was detected. The primary particle sizes, which were determined from the Brunauer-Emmett-Teller analysis surface areas, were 60 nm for NiO and 10 nm for Ru/Sm-doped ceria (SDC) after the heat treatment at 400 °C. The oxalate precursors of SDC and NiO provided 433 and 259 kJ/mol of the activation energy, respectively, for sintering/grain growth in the temperature range from 600 to 1200 °C. As-produced SDC precursor formed platelike secondary particles of 0.5–2-μm length by the heating at 800 °C. Heating of Ni oxalate at 800 °C produced isotropic fine NiO secondary particles of 0.5–2-μm sizes.

Adsorption and photodegradation of methylene blue with Fe2O3-activated carbons under UV illumination in oxalate solution

2014 ◽  
Vol 2 (4) ◽  
pp. 2026-2036 ◽  
Author(s):  
Zukhra C. Kadirova ◽  
Ken-ichi Katsumata ◽  
Toshihiro Isobe ◽  
Nobuhiro Matsushita ◽  
Akira Nakajima ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbons ◽  
Uv Illumination ◽  
Oxalate Solution
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