Acetic Acid Synthesis by Catalytic Carbonylation of Methanol

ChemInform ◽  
2007 ◽  
Vol 38 (45) ◽  
Author(s):  
Anthony Haynes
Keyword(s):  
Acetic Acid ◽  
Acid Synthesis ◽  
Catalytic Carbonylation

New derivatives of xanthenone-4-acetic acid: Synthesis, pharmacological profile and effect on TNF-α and NO production by human immune cells

2006 ◽  
Vol 14 (12) ◽  
pp. 4101-4109 ◽  
Author(s):  
Silvia Gobbi ◽  
Federica Belluti ◽  
Alessandra Bisi ◽  
Lorna Piazzi ◽  
Angela Rampa ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Immune Cells ◽  
Acid Synthesis ◽  
No Production ◽  
Pharmacological Profile ◽  
Tnf Α ◽  
Human Immune ◽  
Derivatives Of

scholarly journals Acrylic acid synthesis by aldol condensation of acetic acid and formaldehyde on V-Ti-PO4 catalysts

2017 ◽  
Vol 0 (32(1254)) ◽  
pp. 117-122
Author(s):  
Iryna Shpyrka ◽  
Roman Nebesnyi ◽  
Zorian Pikh ◽  
Volodymyr Sydorchuk ◽  
Volodymyr Ivasiv ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Aldol Condensation ◽  
Acid Synthesis

scholarly journals The Distribution of Tryptophan-Dependent Indole-3-Acetic Acid Synthesis Pathways in Bacteria Unraveled by Large-Scale Genomic Analysis

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1411 ◽  
Author(s):  
Pengfan Zhang ◽  
Tao Jin ◽  
Sunil Kumar Sahu ◽  
Jin Xu ◽  
Qiong Shi ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Large Scale ◽  
Growth Promotion ◽  
Plant Root ◽  
Genomic Analysis ◽  
Acid Synthesis ◽  
Metagenomic Data ◽  
Bacterial Genomes ◽  
Bacterial Phyla ◽  
Indole 3 Acetic Acid

Bacterial indole-3-acetic acid (IAA), an effector molecule in microbial physiology, plays an important role in plant growth-promotion. Here, we comprehensively analyzed about 7282 prokaryotic genomes representing diverse bacterial phyla, combined with root-associated metagenomic data to unravel the distribution of tryptophan-dependent IAA synthesis pathways and to quantify the IAA synthesis-related genes in the plant root environments. We found that 82.2% of the analyzed bacterial genomes were potentially capable of synthesizing IAA from tryptophan (Trp) or intermediates. Interestingly, several phylogenetically diverse bacteria showed a preferential tendency to utilize different pathways and tryptamine and indole-3-pyruvate pathways are most prevalent in bacteria. About 45.3% of the studied genomes displayed multiple coexisting pathways, constituting complex IAA synthesis systems. Furthermore, root-associated metagenomic analyses revealed that rhizobacteria mainly synthesize IAA via indole-3-acetamide (IAM) and tryptamine (TMP) pathways and might possess stronger IAA synthesis abilities than bacteria colonizing other environments. The obtained results refurbished our understanding of bacterial IAA synthesis pathways and provided a faster and less labor-intensive alternative to physiological screening based on genome collections. The better understanding of IAA synthesis among bacterial communities could maximize the utilization of bacterial IAA to augment the crop growth and physiological function.

A new method for the preparation of peroxymonophosphoric acid

2003 ◽  
Vol 81 (2) ◽  
pp. 156-160 ◽  
Author(s):  
Tian Zhu ◽  
Hou-min Chang ◽  
John F Kadla
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Carbon Tetrachloride ◽  
Glacial Acetic Acid ◽  
Acid Synthesis ◽  
Conversion Ratio ◽  
New Method ◽  
Phosphorous Pentoxide ◽  
Preparation Conditions ◽  
Peroxy Acids

A new method for the preparation of peroxymonophosphoric acid (H3PO5) has been developed. It utilizes a biphasic solution to moderate the vigorous reaction between phosphorous pentoxide (P2O5) and hydrogen peroxide (H2O2). P2O5 is suspended in carbon tetrachloride (CCl4), and concentrated H2O2 is slowly added while being vigorously stirred at low temperature. Careful control of the reaction temperature through the slow addition of H2O2 is critical. Using typical preparation conditions (P2O5:H2O2 = 0.5:1, H2O2 70 wt %, 2°C, 120–180 min), ~70% of the H2O2 is effectively converted to H3PO5. Increasing the concentration of H2O2, as well as the mole ratio of P2O5:H2O2, leads to an even higher % conversion of H2O2 to H3PO5. The addition of glacial acetic acid to the P2O5:H2O2 suspension at the end of the 120–180 min reaction (P2O5:H2O2:CH3COOH = 0.5:1:0.3) leads to the formation of peracetic acid in addition to H3PO5, and to an overall increase in the conversion ratio of total peroxy acids based on H2O2 (>95%).Key words: peroxymonophosphoric acid, synthesis, stability, conversion ratio.

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