scholarly journals Effect of pH Control with Acetic Acid/Sodium Acetate Buffer on Hot-water Extraction of Poplar Wood

2018 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Acetic Acid ◽  
Sodium Acetate ◽  
Ph Control ◽  
Hot Water ◽  
Water Extraction ◽  
Acetate Buffer ◽  
Poplar Wood ◽  
Sodium Acetate Buffer ◽  
Hot Water Extraction ◽  
Effect Of Ph

Utilizing active pH control for enhanced hot-water extraction of wood

2016 ◽  
Vol 31 (1) ◽  
pp. 4-13
Author(s):  
Jens Krogell ◽  
Andrey Pranovich ◽  
Stefan Willför ◽  
Kari Eränen
Keyword(s):  
Ph Control ◽  
Hot Water ◽  
Water Extraction ◽  
Hot Water Extraction

scholarly journals ELECTROENDOSMOSIS THROUGH MAMMALIAN SEROUS MEMBRANES

1925 ◽  
Vol 9 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Stuart Mudd
Keyword(s):  
Acetic Acid ◽  
Sodium Acetate ◽  
Hydrogen Ion ◽  
Acetate Buffer ◽  
Living Animal ◽  
Sodium Acetate Buffer ◽  
Reversal Point ◽  
Citrate Phosphate

The hydrogen ion reversal points of human, dog, and cat serous membranes have been determined with acetic acid-sodium acetate buffer mixtures, and are compared with the reversal points of the same membranes estimated with citrate-phosphate mixtures. The values with acetate buffer are about one-quarter of a pH unit higher (more alkaline) for fat membranes and almost one-half a pH unit higher for lean membranes. The acetate values are believed to correspond more closely to the true hydrogen ion reversal points. The reversal points are again found to be characteristic for membrane and species. No evidence of a postmortem shift in reversal point has been found. The charge of the membranes even in the living animal is capable of ready and repeated reversal.

scholarly journals Separation and characterization of lignin and sugars in the hydrolysate of hot water extraction of poplar wood by membrane filtration and activated carbon adsorption

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 6613-6628
Author(s):  
Guoyu Tian ◽  
Yaqi Chu ◽  
Xiaoqian Chen ◽  
Xiuhong Zhong ◽  
Zhaojiang Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Membrane Filtration ◽  
Hot Water ◽  
Water Extraction ◽  
Poplar Wood ◽  
Activated Carbon Adsorption ◽  
Combined Process ◽  
Hot Water Extraction ◽  
Carbon Adsorption

Hot water extraction of poplar wood was conducted at temperatures from 190 to 200 °C for 5 to 8 min. A hemicellulose yield of 81% and a lignin yield of 38% were obtained at 200 °C for 8 min. A combined process of microfiltration, ultrafiltration, and activated carbon adsorption was developed to separate lignin and sugars in the hydrolysate of hot water extraction. Lignin recovery efficiencies of 56.7%, 26.0%, and 13.2% were attained for microfiltration, ultrafiltration, and activated carbon adsorption, respectively. The characterization of lignin revealed diversity in molecular weight and functional groups, which is beneficial for high-value valorization. The obtained hemicellulose sugars from the combined process showed a good recovery rate of 43.8% and remarkable purity of 97.5%. The purified sugars were a mixture of monomers and oligomers that consisted of arabinose, galactose, xylose, glucose, and mannose. Sugar oligomers with degrees of polymerization from 2 to 6 accounted for 21.6% of all sugars.

In-line high-temperature pH control during hot-water extraction of wood

2015 ◽  
Vol 67 ◽  
pp. 114-120 ◽  
Author(s):  
Jens Krogell ◽  
Kari Eränen ◽  
Andrey Pranovich ◽  
Stefan Willför
Keyword(s):  
High Temperature ◽  
Ph Control ◽  
Hot Water ◽  
Water Extraction ◽  
Hot Water Extraction

Viscosity Properties of Chitosan Solutions in Acetic Acid and Sodium Acetate Buffer

2014 ◽  
Vol 14 (2) ◽  
pp. 5-9
Author(s):  
Ekaterina Vladimirovna Kolsanova ◽  
◽  
Emil Esenbekovich Orozaliev ◽  
Anna Borisovna Shipovskaya ◽  
◽  
...  
Keyword(s):  
Acetic Acid ◽  
Sodium Acetate ◽  
Acetate Buffer ◽  
Sodium Acetate Buffer
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