Chemistry of large hydrated anion clusters X-(H2O)n, O .ltoreq. n .apprxeq. 50 and X = OH, O, O2, and O3. 1. Reaction of carbon dioxide and possible application in understanding of enzymatic reaction dynamics

1991 ◽  
Vol 113 (18) ◽  
pp. 6766-6771 ◽  
Author(s):  
X. Yang ◽  
A. W. Castleman
Keyword(s):  
Carbon Dioxide ◽  
Enzymatic Reaction ◽  
Reaction Dynamics ◽  
Anion Clusters ◽  
Hydrated Anion

Ultrafast enzymatic reaction dynamics in protochlorophyllide oxidoreductase

2003 ◽  
Vol 10 (6) ◽  
pp. 491-492 ◽  
Author(s):  
Derren J Heyes ◽  
C Neil Hunter ◽  
Ivo H M van Stokkum ◽  
Rienk van Grondelle ◽  
Marie Louise Groot
Keyword(s):  
Enzymatic Reaction ◽  
Reaction Dynamics ◽  
Protochlorophyllide Oxidoreductase

Properties of Enzymatic Hydrolysis Corn Starch Sizing Agent Modified in Supercritical Carbon Dioxide

2011 ◽  
Vol 332-334 ◽  
pp. 2103-2107
Author(s):  
Yue Juan Wang ◽  
Hong Jun Fu
Keyword(s):  
Carbon Dioxide ◽  
Enzymatic Hydrolysis ◽  
Water Content ◽  
Supercritical Co2 ◽  
Corn Starch ◽  
Enzymatic Reaction ◽  
Variance Ratio ◽  
Optimum Water Content ◽  
Co2 Treatment ◽  
Optimum Water

This paper describes an experiment of Corn starch treatment with α-amylase under the condition of supercritical CO2 at 50°C, 11MPa, and investigates the effects of different water content on supercritical CO2 treatment of corn starch. The results demonstrate that the viscosity of the treated starch is much lower than that of untreated starch, as well as the variance ratio of the viscosity is up to 96%. The optimum water content for the degradation of the enzymatic reaction is 2%;when water content is up to 3%, the viscosity of the serosity is 5Mpa•s, and the sizing performance reaches the best.

scholarly journals Effects of sonication and high-pressure carbon dioxide processing on enzymatic hydrolysis of egg white proteins

2012 ◽  
pp. 33-41 ◽  
Author(s):  
Zorica Knezevic-Jugovic ◽  
Andrea Stefanovic ◽  
Milena Zuza ◽  
Stoja Milovanovic ◽  
Sonja Jakovetic ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Antioxidant Activity ◽  
High Pressure ◽  
Enzymatic Hydrolysis ◽  
Enzymatic Reaction ◽  
Egg White ◽  
Degree Of Hydrolysis ◽  
Egg White Proteins ◽  
Hydrolysis Of ◽  
Ultrasound Pretreatment

The objectives of this study were to examine the effect of sonication and high-pressure carbon dioxide processing on proteolytic hydrolysis of egg white proteins and antioxidant activity of the obtained hydrolysates. It appeared that the ultrasound pretreatment resulted in an increase in the degree of hydrolysis of the enzymatic reaction while the high-pressure carbon dioxide processing showed an inhibition effect on the enzymatic hydrolysis of egg white proteins to some extent. The antioxidant activity of the obtained hydrolysates was improved by ultrasound pretreatment of egg white proteins at the pH 8.3. Thus, the combination of ultrasound pretreatment at the pH 8.3 and subsequent enzymatic hydrolysis with alcalase at 50?C and pH 8.0 could offer a new approach to the improvement of the functional properties of egg white proteins and their biological activity.

scholarly journals Novel Multifunctional Porous Liquid Composite for Recyclable Sequestration, Storage and In-situ Catalytic Conversion of Carbon Dioxide

2020 ◽  
Author(s):  
Archita Bhattacharjee ◽  
Raj Kumar ◽  
KAMENDRA SHARMA
Keyword(s):  
Carbon Dioxide ◽  
Light And Electron Microscopy ◽  
Enzymatic Reaction ◽  
Catalytic Conversion ◽  
Porous Solids ◽  
X Ray Diffraction ◽  
Hollow Silica ◽  
Polymer Surfactant ◽  
Silica Nanorods

<div><b>Novel Multifunctional Porous Liquid Composite for Recyclable Sequestration, Storage and In-situ Catalytic Conversion of Carbon Dioxide</b> <br></div><div><br></div><div>Archita Bhattacharjee, Raj Kumar and Prof. K. P. Sharma* Department of Chemistry, IIT Bombay, Powai, India <br></div><div>* E-mail: [email protected] <br></div><div><br></div><div>Keywords: Porous liquid composite, mesoporous liquid, hollow silica nanorods, CO<sub>2</sub> capture, CO<sub>2</sub> catalytic conversion<br></div><div><br></div><div>Abstract: Permanent pores combined with fluidity renders flow processability to porous liquids otherwise not seen in porous solids. Although, sequestration of different gases has recently been shown in porous liquids, there is still adearth of studies for deploying in-situ chemical reactionsto convert adsorbed gases into utility chemicals in this phase. Here, a facile method for the design and development of a new class of solvent-less porous liquid composite which, as shown for the first time, can catalyze the conversion of adsorbed gaseous molecules into industrially relevant product, is shown. The recyclable porous liquid composite comprising polymer-surfactant modified hollow silica nanorods and carbonic anhydrase enzyme not onlysequesters (5.5 ccg<sup>-1</sup> at 273 K and 1 atm) and stores CO<sub>2</sub>,but is also capable of driving an in-situ enzymatic reaction for hydration of CO<sub>2</sub> to HCO<sub>3</sub><sup>-</sup> ion, subsequently converting it CaCO<sub>3</sub> due to reaction with pre-dissolved Ca<sup>2+</sup>. Light and electron microscopy combined with x-ray diffraction reveals the nucleation and growth of calcite and aragonite crystals. Moreover, the liquid-like property of the porous composite material can be harnessed by executing the same reaction via diffusion ofcomplimentary Ca<sup>2+</sup> and HCO<sub>3</sub><sup>-</sup> ions through different compartments separated by an interfacial channel.<br></div><div></div>

The Potential of Garlic Extract as Bio-Inhibitor in Urea Fertilizer

2013 ◽  
Vol 594-595 ◽  
pp. 296-300
Author(s):  
Sity Juaeiriah Samsudin ◽  
Nurlidia Binti Mansor ◽  
Suriati Sufian ◽  
Zakaria B. Man
Keyword(s):  
Carbon Dioxide ◽  
Enzymatic Reaction ◽  
Inhibitory Effect ◽  
Garlic Extract ◽  
Medical Applications ◽  
Application Research ◽  
Inhibitory Effects ◽  
Agricultural Industry ◽  
Urea Fertilizer ◽  
Hydrolysis Of

Urea is extensively used as fertilizer in the agricultural industry based on its suitability for all types of crops. The hydrolysis of urea fertilizer produces ammonia (NH3) and carbon dioxide (CO2). However, up to 40% of NH3 release affects the efficiency of urea fertilizer. By introducing inhibitors into the urea enzymatic reaction, the NH3 emission problem can be solved. Unfortunately, current inhibitors are usually chemical based and non-biodegradable. Several complaints and accidents have been reported when handling chemical based inhibitors especially for surface application. Research on garlic or Allium savatium has been conducted to ensure its inhibitory effects as potentially safe and biodegradable inhibitor. From previous research, thiosulfinates (TS) contained in garlic extract proved to inhibit platelets aggregation in medical applications. In this study, the inhibitory effect is determined by analyzing NH3 concentration in urease-garlic mixture and standard urea assay mixtures using UV-VIS spectrophotometer device. Previous research showed the highest absorbance of free NH3 was detected at 370nm. At 30 minutes of 15ml of urease-garlic mixture confirms the fully inhibition of garlic extract towards reaction.

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