scholarly journals Preparation of Oligosaccharides by Degradation of Polysaccharides from Chinese Jujube and Its Biological Activity

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Xu Yan ◽  
Weiwei Wang ◽  
Mengjun Liu ◽  
Zhihui Zhao
Keyword(s):  
Biological Activity ◽  
Reaction Time ◽  
Acid Hydrolysis ◽  
Degradation Rate ◽  
Enzyme Hydrolysis ◽  
Surface Model ◽  
Cellulose Solution ◽  
Chinese Jujube ◽  
Buffer Solution ◽  
Hydrolysis Conditions

This study examined the degradation of polysaccharides to oligosaccharides in Chinese jujube fruits. Using a response surface model, the degradation conditions of polysaccharides under acid hydrolysis and enzymatic hydrolysis were optimized in laboratory conditions. A degradation rate of 66.9% was obtained under optimum acid hydrolysis conditions: 0.6 mol/L hydrochloric acid, 3% substrate concentration, and 1 h reaction time. A degradation rate of 41.4% was obtained under optimum enzyme hydrolysis conditions: 4.0 mL cellulose solution (10 mg/mL), 0.3 mL substrate solution (20 mg/mL), 0.7 mL citric acid buffer solution (pH 5), and 7.3 h reaction time. Using the stimulation effect for strain J-4 intestinal probiotic proliferation, the biological activity of oligosaccharides was determined. The results showed that the oligosaccharides from enzyme hydrolysis encouraged intestinal probiotic proliferation.

The Acid Hydrolysis of Sugarcane Leaves as a Biofeedstook for Bioethanol Production

2014 ◽  
Vol 931-932 ◽  
pp. 194-199 ◽  
Author(s):  
Supattra Boochapun ◽  
Wimonporn Lamamorphanth ◽  
Khanita Kamwilaisak
Keyword(s):  
Reaction Time ◽  
Acid Hydrolysis ◽  
High Performance ◽  
Incubation Temperature ◽  
Research Work ◽  
Agricultural Product ◽  
A Value ◽  
Treated Sample ◽  
The One ◽  
Hydrolysis Conditions

The sugarcane is the one of economic agricultural product in Thailand. The sugarcane leaf is a residual waste from post-harvest process. Conversion of the residual waste to a value material is quite a challenge. The aim of this research work is to extract sugar from the sugarcane leaf by the acid hydrolysis reaction. The hydrolysis conditions were varied in terms of sulfuric acid (H2SO4) concentration (04%, v/v), reaction time (15180 minutes), amount of sugar cane leaves (50-125g/l) with constant incubation temperature at 122 °C. The identification and quantitation analysis of hydrolysed sample was performed by high performance liquid chromatography (HPLC). The result was shown the best hydrolysis condition was at 1% v/v of H2SO4, reaction time 60 min and the sugarcane leaves 100 g / L with ca 17 g/L of xylose, ca 3 g/L of glucose and ca 2 g/L of arabinose. Also, the Scanning Electron Microscopy (SEM) was analysed the morphology of untreated and treated sugarcane leaf which the surface of treated sample showed the broken fibril.

The impact of acid hydrolysis conditions on carbohydrate determination in lignocellulosic materials: a case study with Eucalyptus globulus bark

Holzforschung ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ricardo Jorge Oliveira ◽  
Bruna Santos ◽  
Maria J. Mota ◽  
Susana R. Pereira ◽  
Pedro C. Branco ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Eucalyptus Globulus ◽  
Industrial Processes ◽  
Lignocellulosic Materials ◽  
Optimal Conditions ◽  
Hydrolysis Conditions ◽  
The Impact ◽  
Eucalyptus Bark

Abstract Lignocellulosic biomass represents a suitable feedstock for production of biofuels and bioproducts. Its chemical composition depends on many aspects (e.g. plant source, pre-processing) and it has impact on productivity of industrial bioprocesses. Numerous methodologies can be applied for biomass characterisation, with acid hydrolysis being a particularly relevant step. This study intended to assess the most suitable procedures for acid hydrolysis, taking Eucalyptus globulus bark as a case study. For that purpose, variation of temperature (90–120 °C) was evaluated over time (0–5 h), through monosaccharides and oligosaccharides contents and degradation. For glucose, the optimal conditions were 100 °C for 2.5 h, reaching a content of 48.6 wt.%. For xylose, the highest content (15.2 wt.%) was achieved at 90 °C for 2 h, or 120 °C for 0.5 h. Maximum concentrations of mannose and galactose (1.0 and 1.7 wt.%, respectively) were achieved at 90 and 100 °C (2–3.5 h) or at 120 °C (0.5–1 h). These results revealed that different hydrolysis conditions should be applied for different sugars. Using this approach, total sugar quantification in eucalyptus bark was increased by 4.3%, which would represent a 5% increase in the ethanol volume produced, considering a hypothetical bioethanol production yield. This reflects the importance of feedstock characterization on determination of economic viability of industrial processes.

Study on Fe3O4 Magnetism Nanoparticle Catalytic Degradation of Brilliant Blue Dye in Wastewater

2013 ◽  
Vol 726-731 ◽  
pp. 2960-2963
Author(s):  
Ai Hui Liang ◽  
Dong Qin Han ◽  
Hui Yue Gan ◽  
Zhi Liang Jiang
Keyword(s):  
Spectrophotometric Method ◽  
Degradation Rate ◽  
Catalytic Degradation ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Optimal Conditions ◽  
Buffer Solution ◽  
The Media

In this paper, the effect of Fe3O4nanoparticle catalytic degradation brilliant blue X-BR dye was studied using spectrophotometric method. It was found that in the media of pH 0.65 HCl-NaAc buffer solution, 100 μmol/L H2O2, 0.7 g/L Fe3O4nanoparticle and the temperature 25°C, the degradation rate for reactive brilliant blue X-BR was over 93.5% in 20 min under the optimal conditions.

scholarly journals Effect of Dilute-acid Hydrolysis Conditions on Sugar and Productions from Paragrass

2019 ◽  
Vol 265 ◽  
pp. 012010 ◽  
Author(s):  
Vipa Thongtus ◽  
Sasikarn Nuchdang ◽  
Papin Chirathivat ◽  
Elvin J. Moore ◽  
Chantaraporn Phalakornkule
Keyword(s):  
Acid Hydrolysis ◽  
Dilute Acid ◽  
Dilute Acid Hydrolysis ◽  
Hydrolysis Conditions

Synergetic Degradation of Zidovudine Wastewater by Ultrasonic and Iron-Carbon Micro-Electrolysis

2011 ◽  
Vol 347-353 ◽  
pp. 1949-1952 ◽  
Author(s):  
Liang Li ◽  
Bing Zhe Xu ◽  
Chang Yu Lin ◽  
Xiao Min Hu
Keyword(s):  
Reaction Time ◽  
Degradation Rate ◽  
Removal Rate ◽  
Cod Removal ◽  
Mass Ratio ◽  
Initial Ph ◽  
Cod Removal Rate

Zidovudine wastewater is difficult to biodegradation due to high COD and toxicity. The synergetic treatment of Zidovudine wastewater by Ultrasonic and iron-carbon micro-electrolysis technology was studied. The influence of initial pH, reaction time, mass ratio of iron and carbon and mass ratio of iron and water on degradation rate of COD was researched. The result showed that the COD removal rate was only about 54.3% and the degradation speed is very slow when iron-carbon micro-electrolysis treated Zidovudine wastewater　separately. However, when ultrasonic synergy micro-electrolysis to treat Zidovudine wastewater, the COD removal rate could was up to 85% and the reaction time was also decreased. Moreover, the BOD5 / COD rose from 0.15 to 0.35, which meant the wastewater became easily biodegradable.

Photoelectrocatalytic Properties of Porous TiO2 Films Prepared Using ODA as Template

2012 ◽  
Vol 457-458 ◽  
pp. 521-524 ◽  
Author(s):  
Wen Jie Zhang ◽  
Qian Li ◽  
Hong Bo He
Keyword(s):  
Reaction Time ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Synergetic Effect ◽  
Degradation Process ◽  
Absorption Peak ◽  
Photocatalytic Process ◽  
Applied Potential ◽  
Peak Intensity ◽  
Photoelectrocatalytic Degradation

The functions of applied potential to the photoelectrocatalytic degradation process of methyl orange were investigated. When using 0.05 M NaCl and under different applied potentials, the degradation rate increased obviously with increasing applied potential. When the applied potential was between 0.6 V-1.0 V, the degradation rate was enhanced drastically. The detected current values got larger as the applied potential increased from 0 up to 1.2 V. There was no direct electro-degradation to the dye in the solution. The applied potential and the irradiated light had synergetic effect when they were applied to the solution at the same time. While after irradiation for 0 to 60 min, with the increasing reaction time, methyl orange absorption peak intensity shrank obviously. The azo and benzene groups in methyl orange degraded totally under photocatalytic process.

scholarly journals Effect of UV Light on Biological Activity of Tyrosinase in Buffer Solution

1979 ◽  
Vol 20 (2) ◽  
pp. 186-195 ◽  
Author(s):  
RAKESH CHAND SHARMA ◽  
RASHID ALI ◽  
OSAMU YAMAMOTO
Keyword(s):  
Biological Activity ◽  
Uv Light ◽  
Buffer Solution

scholarly journals Study of polylactide degradation rate in a phosphate buffer solution

2019 ◽  
Vol 525 ◽  
pp. 012100
Author(s):  
A S Baikin ◽  
E O Nasakina ◽  
A M Tsareva ◽  
M A Kaplan ◽  
A A Kolmakova ◽  
...  
Keyword(s):  
Phosphate Buffer ◽  
Degradation Rate ◽  
Phosphate Buffer Solution ◽  
Buffer Solution
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