Changes in acid base components of blood on storage at room temperature

1970 ◽  
Vol 3 (9) ◽  
pp. 409-414
Author(s):  
Catriona Doran ◽  
Sheila Kenny ◽  
P. J. Leonard
Keyword(s):  
Room Temperature ◽  
Acid Base

scholarly journals Computational design of pH-switchable control agents for nitroxide mediated polymerization

2017 ◽  
Vol 19 (34) ◽  
pp. 22678-22683 ◽  
Author(s):  
Ganna Gryn’ova ◽  
Leesa M. Smith ◽  
Michelle L. Coote
Keyword(s):  
Quantum Chemistry ◽  
Room Temperature ◽  
Computational Design ◽  
Acid Base ◽  
Nitroxide Mediated Polymerization

In the present work we use accurate quantum chemistry to evaluate several known and novel nitroxides bearing acid–base groups as pH-switchable control agents for room temperature NMP.

An Aluminum Acid‐Base Concentration Cell Using Room Temperature Chloroaluminate Ionic Liquids

1984 ◽  
Vol 131 (12) ◽  
pp. 2887-2892 ◽  
Author(s):  
C. J. Dymek ◽  
J. L. Williams ◽  
D. J. Groeger ◽  
J. J. Auborn
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Acid Base ◽  
Concentration Cell

Structure and water durability of tin(II) organosilicophosphate glasses prepared by nonaqueous acid–base reactions

2006 ◽  
Vol 21 (7) ◽  
pp. 1798-1806 ◽  
Author(s):  
Megumi Mizuno ◽  
Masahide Takahashi ◽  
Toshinobu Yoko
Keyword(s):  
Room Temperature ◽  
Orthophosphoric Acid ◽  
Chain Structure ◽  
Acid Base ◽  
Humid Atmosphere ◽  
Water Durability ◽  
Magnetic Resonance Technique ◽  
A Chain ◽  
Degree Of Condensation ◽  
High Degree

Tin(II) organosilicophosphate glasses were prepared by nonaqueous acid–base reactions using orthophosphoric acid, dimethyldichlorosilane, and tin(II)chloride as the starting materials. The structure of the methylsiloxane-phosphate copolymer (methylsilicophosphate) and tin(II) methylsilicophosphate glasses was mainly investigated by the 31P nuclear magnetic resonance technique. A chain structure composed of the –(P–O–Si–O)m– silicophosphate bonds was found as the main structural unit in the methylsilicophosphate prepared by mixing orthophosphoric acid and dimethyldichlorosilane at room temperature. Tin(II) methylsilicophosphate glasses could be prepared by introducing SnCl2 as a cross-linking agent of silicophosphate chains. By increasing the reaction temperature, it was possible to promote the reaction and then to increase the network dimensions of the resultant tin(II) methylsilicophosphate glasses. It was found that the glasses with a high degree of condensation tend to have a better water durability in a humid atmosphere.

scholarly journals A room temperature phosphorescence encoding [2]rotaxane molecular shuttle

2016 ◽  
Vol 7 (7) ◽  
pp. 4582-4588 ◽  
Author(s):  
Xiang Ma ◽  
Jing Zhang ◽  
Jingjing Cao ◽  
Xuyang Yao ◽  
Tiantian Cao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Acid Base ◽  
Phosphorescence Emission ◽  
Molecular Shuttle

The shuttling of an acid–base switchable bistable [2]rotaxane is addressed by room temperature phosphorescence emission signals.

Infrared Studies of the Effects of Acid, Base, Heat, and Pressure on Asbestos and Structurally Related Substances

1977 ◽  
Vol 60 (6) ◽  
pp. 1266-1276
Author(s):  
Jo-Yun T Chen
Keyword(s):  
Room Temperature ◽  
Chemical Properties ◽  
Aqueous Sodium Hydroxide ◽  
Acid Base ◽  
Characteristic Frequencies ◽  
Asbestos Fibers ◽  
Related Substances ◽  
Sea Sand ◽  
Infrared Studies ◽  
Saturated Aqueous Sodium

Abstract Reference infrared (IR) spectra of 5 asbestos fibers (amosite, anthophyllite, chrysotile, crocidolite, and tremolite), talc, and sea sand are presented. These reference spectra were recorded using microgram amounts of commercial samples, and the observed characteristic frequencies were tabulated. Some chemical properties of asbestos were investigated by IR spectroscopy. In acid, chrysotile is rapidly hydrolyzed to silicic acid at room temperature; amphibolic asbestos and talc are degraded under heat and pressure ; sea sand is most stable in acid. The asbestos fibers, talc, and sea sand are stable in saturated aqueous sodium hydroxide at room temperature for 1 day or potassium hydroxidemethanol (10+90) at 65°C for 3 hr. All of the samples except sea sand degrade to sodium silicate under heat and pressure in alkali.

Room-Temperature Coulomb Blockade from Chemically Synthesized Au Nanoparticles Stabilized by Acid–Base Interaction

2010 ◽  
Vol 3 (10) ◽  
pp. 105003 ◽  
Author(s):  
Shinya Kano ◽  
Yasuo Azuma ◽  
Masayuki Kanehara ◽  
Toshiharu Teranishi ◽  
Yutaka Majima
Keyword(s):  
Coulomb Blockade ◽  
Room Temperature ◽  
Au Nanoparticles ◽  
Acid Base ◽  
Base Interaction ◽  
Acid Base Interaction

Evaluation of Anthocyanin Content in Red and Blue Flowers

2010 ◽  
Vol 6 (4) ◽  
Author(s):  
Padma S Vankar ◽  
Jyoti Srivastava
Keyword(s):  
Antioxidant Activity ◽  
Health Effects ◽  
Room Temperature ◽  
Quantitative Relationship ◽  
Anthocyanin Content ◽  
Acid Base ◽  
Total Anthocyanin ◽  
Natural Colorants ◽  
Total Anthocyanin Content ◽  
Extensive Range

Anthocyanins are natural colorants which have gained a growing interest due to their extensive range of colors and beneficial health effects. The red and blue shades of 15 flowers were extracted with 1 % acidic methanol and these extracts were then screened for Total Anthocyanin content (TAC) using the pH method. In this paper the overall anthocyanin content of red and blue flowers was determined at room temperature (25°C). TAC accounts for the antioxidant activity of red and blue flowers. A quantitative relationship between acid-base and redox chemistry was also drawn.

Degradation of GD and VX over Oxides Mixing with Bleaching Powder

2012 ◽  
Vol 616-618 ◽  
pp. 1702-1706
Author(s):  
Lian Yuan Wang ◽  
Hai Yan Zhu ◽  
Zhen Xing Cheng ◽  
Meng Meng Ma ◽  
Jing Liang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Surface Acidity ◽  
Chemical Warfare Agents ◽  
Chemical Warfare ◽  
Acid Base ◽  
Base Property ◽  
Bleaching Powder ◽  
Ethyl Methyl ◽  
Warfare Agents ◽  
Acid Base Property

Nanosize oxides with acidic or basic sites could neutralize the droplets of chemical warfare agents. Refined bleaching powder was added to increase the reactivity of the nanosize oxides for degradation of GD(3,3-dimethyl-2-butyl methylphophonofluoridate or Soman) and VX(O-ehtyl S-2-(diisopropylamino)ethyl methyl-phosphonothioate). It was found that all the studied decontaminant powders exhibited room-temperature reactivity for GD and VX droplets which depends on their surface acid–base property. Decontaminant powders with basicity like nanosize MgO have the best activity towards GD and the degradation rate was improved obviously for N-MgO due to the adding of refined bleaching powder. However, surface acidity was very important for neutralizing VX over the decontaminant powders.

scholarly journals Protonation of maleic and fumaric acid in aqueous sulfuric acid solutions

2000 ◽  
Vol 65 (10) ◽  
pp. 695-708 ◽  
Author(s):  
Katica Jankovska ◽  
Lidija Soptrajanova ◽  
Ilinka Spirevska
Keyword(s):  
Sulfuric Acid ◽  
Fumaric Acid ◽  
Acidic Medium ◽  
Room Temperature ◽  
Acid Solutions ◽  
Hammett Equation ◽  
Acid Base ◽  
P Values ◽  
Solvation Parameters ◽  
Sulfuric Acid Solutions

The protonations of maleic and fumaric acid in an acidic medium (aqueous solutions of sulfuric acid) were followed spectrophotometrically at room temperature. The acid-base equilibria were characterised qualitatively and quantitatively. The pKBH+ values were determined using the Hammett equation, employing several acid functions in order to determine which of them describes best the protonation process of the studied organic acids. The thermodynamic pKBH+ values as well as those of the solvation parameters m, m* and ? and of the thermodynamic protonation constants (or, rather, the pKa,p values) were also defermined. The method of characteristic vector analysis (CVA) was used to reconstruct the experimental spectra.

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