The Application of Fiber Quality Analysis (FQA) and Cellulose Accessibility Measurements To Better Elucidate the Impact of Fiber Curls and Kinks on the Enzymatic Hydrolysis of Fibers

2019 ◽  
Vol 7 (9) ◽  
pp. 8827-8833
Author(s):  
Richard P. Chandra ◽  
Jie Wu ◽  
Jack N. Saddler
Keyword(s):  
Enzymatic Hydrolysis ◽  
Fiber Quality ◽  
Quality Analysis ◽  
Cellulose Accessibility ◽  
The Impact ◽  
Hydrolysis Of

Cellulose accessibility determines the rate of enzymatic hydrolysis of steam-pretreated spruce

2012 ◽  
Vol 126 ◽  
pp. 208-215 ◽  
Author(s):  
Magnus Wiman ◽  
Dora Dienes ◽  
Mads A.T. Hansen ◽  
Torbjörn van der Meulen ◽  
Guido Zacchi ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Cellulose Accessibility ◽  
Hydrolysis Of

Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis

TAPPI Journal ◽  
2015 ◽  
Vol 14 (5) ◽  
pp. 305-309
Author(s):  
S. S. LAVRYKOV ◽  
B.V. RAMARAO
Keyword(s):  
Fiber Quality ◽  
Quality Analysis ◽  
Hydrodynamic Characteristics ◽  
Pulp Fibers ◽  
Permeability Characteristics ◽  
Surface Areas ◽  
Geometrical Features ◽  
The Impact ◽  
Specific Volumes

It is often necessary to characterize papermaking pulps in order to determine the impact of refining or to predict their drainage properties. The newer methods for pulp quality analysis determine geometrical features of pulp fibers by microimaging techniques. However, features such as fiber length, coarsenes, and their distributions do not yield easily to estimation of their drainage or papermaking properties. In quantifying the impact of refining on fiber quality, it is useful to approach the rheology of pulps as an indicator of their behavior. We determined the hydrodynamic characteristics of a variety of refined pulps along with their permeability characteristics, i.e., the hydrodynamic specific surface area and the specific volume. Our method was to analyze the filtration/drainage curves and fit predictions from models with observed data. This inversion problem is usually complex and requires global minimization techniques. This paper presents data on bleached kraft hardwood pulps and mixtures with fines and how their surface areas and specific volumes change with composition. These data are further used to predict the behavior of the pulps in drainage situations using models of forming.

scholarly journals Alkali Pretreatment and Enzymatic Hydrolysis of Australian Timber Mill Sawdust for Biofuel Production

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Raymond Martin Trevorah ◽  
Maazuza Z. Othman
Keyword(s):  
Enzymatic Hydrolysis ◽  
Simultaneous Saccharification And Fermentation ◽  
Glucose Production ◽  
Biofuel Production ◽  
Alkali Pretreatment ◽  
Ethanol Yields ◽  
The Impact ◽  
Hydrolysis Of ◽  
Potential Use ◽  
Simultaneous Saccharification

This study investigated the potential use of alkali pretreatment of sawdust from Australian timber mills to produce bioethanol. Sawdust was treated using 3–10% w/w NaOH at temperatures of 60, 121, and −20°C. Two pathways of production were trialled to see the impact on the bioethanol potential, enzymatic hydrolysis for glucose production, and simultaneous saccharification and fermentation (SSF) for ethanol production. The maximum yields obtained were at 121°C and −20°C using 7% NaOH, with 29.3% and 30.6% ethanol yields after 0.5 and 24 hr, respectively, these treatments yielded 233% and 137% increase from the 60°C counter parts. A notable trend of increased ethanol yields with increased NaOH concentration was observed for samples treated at 60°C; for example, samples treated using 10% NaOH produced 1.92–2.07 times more than those treated using 3% NaOH. FTIR analysis showed reduction in crystallinity correlating with increased ethanol yields with the largest reduction in crystallinity in the sample treated at −20°C for 24 hr with 7% NaOH.

scholarly journals Membrane Filtration-Assisted Enzymatic Hydrolysis Affects the Biological Activity of Potato Juice

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 852
Author(s):  
Przemysław Łukasz Kowalczewski ◽  
Anna Olejnik ◽  
Iga Rybicka ◽  
Magdalena Zielińska-Dawidziak ◽  
Wojciech Białas ◽  
...  
Keyword(s):  
Biological Activity ◽  
Enzymatic Hydrolysis ◽  
Cell Line ◽  
Membrane Filtration ◽  
Nutritional Value ◽  
Protein Hydrolysate ◽  
Gastrointestinal Symptoms ◽  
Human Colon Cancer ◽  
The Impact ◽  
Hydrolysis Of

The results of recently published studies indicate that potato juice is characterized by interesting biological activity that can be particularly useful in the case of gastrointestinal symptoms. Moreover, the studies also described the high nutritional value of its proteins. This article is a report on the impact of the enzymatic hydrolysis of proteins combined with membrane filtration. The obtained potato juice protein hydrolysate (PJPH) and its concentrate (cPJPH) were characterized in terms of their nutritional value and biological activity. The amino acid profile and scoring, the content of mineral compounds, and the antioxidant and in vitro cytotoxic activity were assessed. The study proved that the antioxidant activity of PJPH is higher than that of fresh potato juice, and the cytotoxicity against human gastric carcinoma cell line (Hs 746T), human colon cancer cell line (Caco-2), human colorectal adenocarcinoma cell line (HT-29), and human normal colon mucosa cell line (CCD 841 CoN) showed biological activity specifically targeted against cancer cells. Therefore, it can be concluded that the membrane filtration-assisted enzymatic hydrolysis of potato juice proteins may increase their biological activity and allow for potato juice to be used in the production of medicinal preparations.

scholarly journals Design and performance of amphiphilic lignin derivatives in enzymatic hydrolysis of sweet sorghum bagasse for bioethanol production

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5875-5889
Author(s):  
Nissa Nurfajrin Solihat ◽  
Rika Raniya ◽  
Triyani Fajriutami ◽  
Apri Heri Iswanto ◽  
Widya Fatriasari ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Sweet Sorghum ◽  
Cellulose Content ◽  
Sweet Sorghum Bagasse ◽  
Bioethanol Production ◽  
Hydrolysis Time ◽  
Peg 4000 ◽  
Sorghum Bagasse ◽  
The Impact ◽  
Hydrolysis Of

Sweet sorghum bagasse (SSB) is potential feedstock for bioethanol production due to its natural abundance and high cellulose content (> 40%). This work compared the impact of three variables relative to the enzymatic hydrolysis of SSB kraft pulp. The three variables were the biosurfactant from lignin derivative known as amphiphilic lignin derivatives (A-LD), the enzyme loading level, and the hydrolysis time. These variables were optimized by response surface methodology (RSM) with a Box-Behnken design (BBD). The concentration of polyethylene glycol (PEG) 4000 was also optimized to compare it with the A-LD performance in the enzymatic hydrolysis process. After optimization, the A-LD produced a higher reducing sugar yield (RSY) (99.45%) than the PEG 4000. The difference in the predicted versus experimental values of the RSY was less than 4%, which means that the model was highly predictive. The adequacy of the model was confirmed by a regression value close to 1 for the A-LD assisted test. The result implies that the A-LD significantly improved the enzymatic hydrolysis performance to enhance the RSY. Moreover, the BBD is adequate and useful to identify the optimum concentration of surfactant.

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