scispace - formally typeset
Search or ask a question

What is the oxidation modification in Bacteria cellulose? 


Best insight from top research papers

Oxidation modification in bacterial cellulose involves the covalent immobilization of biomolecules, enhancing its functionality. Various methods like NaIO4 oxidation have been optimized to create dialdehyde derivatives of bacterial cellulose films, enabling the immobilization of enzymes like pepsin and β-galactosidase . Additionally, surface modifications using oxygen plasma and silanization with TCMS have been employed to enhance hydrophobicity, without compromising the film structure, making it suitable for diverse applications . The oxidation process alters the cellulose structure, affecting properties like crystallinity, tensile strength, and thermal stability, while also impacting the enzymatic activity of immobilized enzymes . Moreover, the degree of oxidation influences the water absorption capacity and hydrolytic stability of the modified bacterial cellulose films .

Answers from top 4 papers

More filters
Papers (4)Insight
The oxidation modification in bacterial cellulose involves a combination of oxygen plasma treatment and silanization with trichloromethyl silane, enhancing surface hydrophobicity and stability for various applications.
Oxygen plasma treatment of bacterial cellulose led to increased O-H out-of-plane bending at 713 cm^-1 and enhanced hydrophilicity indicated by the peak enlargement at 3340 cm^-1.
Oxidation modification in bacterial cellulose involves NaIO4 treatment, reducing crystallinity and tensile strength while enhancing enzyme immobilization efficiency, as shown in the study.
Oxidation with sodium periodate produces dialdehyde derivatives of bacterial cellulose gel films, enhancing aldehyde groups for enzyme binding via azomethine bonds, as indicated in the study.

Related Questions

What is Surface modification (functional group graft) of bacteria cellulose?4 answersSurface modification of bacterial cellulose involves chemically altering the surface of bacterial cellulose to introduce functional groups that can enhance its properties for various applications. Techniques such as Suzuki coupling, plasma and irradiation-based methods, and solvent-free grafting with anhydrides like glutaric and succinic have been explored to introduce carboxylate, hydrophobic, or antibacterial functional groups onto the cellulose surface. These modifications aim to improve characteristics like wettability, antibacterial properties, and mechanical strength, making bacterial cellulose suitable for applications in wound healing, tissue engineering, and biomedical devices. The surface modification process plays a crucial role in tailoring bacterial cellulose for specific uses by adjusting its chemical composition and surface properties.
What is immerse method modification for bacteria cellulose?5 answersThe immerse method modification for bacterial cellulose involves various techniques to enhance its properties. One method includes immersing a bacterial cellulose film in a solution containing carbonyl diimidazole and DMSO, followed by stirring and washing to obtain a modified product. Another approach includes immersing the bacterial cellulose in a solution with hydroxypropylmethylcellulose and carboxymethyl cellulose sodium during fermentation, altering the net structure of the cellulose directly in the process without the need for additional treatment, resulting in improved rehydration properties and widened applications. Additionally, utilizing a microbial synthesis system with functionalized glucose can lead to the production of functional bacterial cellulose with unique characteristics, showcasing efficiency and environmental friendliness in modification processes.
What is the potential of bacterial cellulose in the food industry?3 answersBacterial cellulose (BC) has significant potential in the food industry. BC is a natural polymer with unique properties such as high moisture-holding capacity, durability, and biodegradability. It can be easily modified and obtained in different shapes, making it suitable for various applications. BC has been used as a raw material in the production of food ingredients, packaging materials, and delivery systems. It can be used as a low-calorie bulking ingredient in the development of functional foods. BC also has suspending, thickening, and stabilizing properties, making it useful in the food industry. Additionally, BC has been studied for its potential in areas such as food safety, drug delivery, and 3D printing technology. Overall, BC offers opportunities for innovation and development in the food industry, providing benefits such as improved food quality and sustainability.
How to produce bacterial cellulose using medium?5 answersBacterial cellulose (BC) can be produced using different types of culture media. Complex media, which involve modification of carbon and nitrogen sources, have been commonly used for BC production. These complex media often include non-conventional components to improve BC yield and reduce production costs. However, the exact composition of these media is often unknown, making it difficult to reproduce the process. Alternatively, chemically and minimal defined media, which have an exact amount of nutrients, have been explored as potential alternatives for BC culture media. The modulation of different types of culture media can determine the costs, yield, and properties of BC. Additionally, waste byproducts and inexpensive carbon sources, such as coconut water and fruit juices, have been successfully used as fermentation media for BC production, reducing production costs.
Enzymes of bacterial cellulose?5 answersBacterial cellulose is a substrate for cellulase enzymes, which are produced by various bacterial strains such as Bacillus pacificus and Pseudomonas mucidolens. These enzymes have diverse applications in industries such as textile, detergent, leather, food, feed, and paper. The cellulase enzyme extracted from these bacterial strains has a molecular weight of 32 kDa. In addition to cellulase, other enzymes such as pepsin and β-galactosidase can also be immobilized on modified gel films of bacterial cellulose. The gel film binds more β-galactosidase than pepsin under the same conditions. Furthermore, antimicrobial peptides (AMPs) can be combined with enzymes that quench the quorum sensing of bacterial cells, such as AHL-hydrolyzing enzymes, to enhance their antimicrobial activity. These combinations can be loaded onto bacterial cellulose to create effective dressing materials with enhanced antibacterial properties. Overall, enzymes play a crucial role in the modification, immobilization, and antimicrobial activity of bacterial cellulose.
How to produce bacterial cellulose?3 answersBacterial cellulose (BC) can be produced using various methods and techniques. One approach is to use glycerol as a renewable carbon source, which has been shown to be an efficient and environmentally friendly option for BC production. Another method involves using natural loofa sponge as a scaffold for the immobilization of Gluconacetobacter kombuchae, which enhances BC production. Bacteria such as Gluconacetobacter xylinus can self-assemble and produce cellulose capsules, which can be used in various applications. BC production can also be achieved through different culture techniques and media, with various sources for bacterial strain isolation. To overcome limitations in BC production, efforts have been made to identify waste byproducts and inexpensive carbon sources, such as industrial and municipal wastes, coconut water, and fruit juices. These strategies have helped reduce production costs and make BC production more economically viable.

See what other people are reading

What is adsorbate solution?
5 answers
An adsorbate solution refers to a liquid phase where a substance accumulates on a solid surface before being removed from the liquid phase. This process involves the adsorption of a compound (adsorbate) onto a solid material (adsorbent). Adsorption isotherms are used to describe the equilibrium of adsorption, showing the amount of material bound to the surface relative to the substance present in the solution. Understanding the interactions between adsorbents and adsorbates is crucial for designing effective adsorbents, with factors like electrostatic interactions, hydrogen bonding, and hydrophobic interactions playing significant roles. Additionally, the presence of impurities like ionic adsorbates can impact the properties of materials synthesized in solution, emphasizing the importance of considering unintentional impurities for proper structure-property relationships in solution-processed materials.
Does the Rnase A has an impact on proteins of an extract concerning thermal stability?
4 answers
Ribonuclease A (RNase A) has a significant impact on the thermal stability of proteins within various environments. Studies have shown that RNase A unfolding/refolding within deep eutectic solvents (DESs) can lead to a loss in folding reversibility, potentially linked to ammonia evolution. Additionally, the presence of trimethylamine N-oxide (TMAO), a compatible osmolyte, can stabilize RNase A at neutral pH conditions but not at acidic pH, showcasing its role in counteracting denaturing effects. Encapsulation of RNase A in mesoporous silicates (MPS) can enhance its stability depending on surface characteristics and pore size, with the addition of urea impacting protease activity. Furthermore, the thermal stability of RNase A is influenced by various denaturants like urea and guanidine hydrochloride, with changes in preferential solvation affecting the protein's structural properties. Isotopic substitution from H2O to D2O alters the thermodynamic properties of RNase A, affecting its transition temperature and volumetric properties.
What is the purpose of surface treatment in high strength gear used in aviation?
4 answers
Surface treatment in high-strength gears used in aviation serves the crucial purpose of enhancing corrosion resistance, wear resistance, and overall durability of the gear components. By applying specialized treatments such as corrosion-resistant coatings, heat treatments, and surface modifications, these gears can withstand harsh environmental conditions, mechanical stresses, and operational demands typical in aviation applications. The treatments help in extending the service life of the gears, ensuring reliable performance, and reducing maintenance requirements, which are essential for the safety and efficiency of aircraft operations. Overall, surface treatment plays a vital role in maintaining the integrity and functionality of high-strength gears in aviation systems.
Which is the better technique to charatization of nanometrics organics coating by cross section?
5 answers
The most effective technique for characterizing nanometric organic coatings through cross-section analysis involves preparing tough samples for transmission electron microscopy (TEM). This methodology includes depositing organic layers on flexible substrates, sandwiching them between metal thin films for contrast enhancement, and utilizing ultra-microtomy to create sub-150 nm sections suitable for high-resolution TEM imaging. Additionally, nanoindentation techniques can be employed to investigate the mechanical properties of organic-inorganic coatings, determining hardness, elastic modulus, residual stress, and interface toughness. By combining these approaches, researchers can gain insights into the microstructure, thickness, dispersion of nanotubes, and overall structural stability of nanometric organic coatings, providing a comprehensive understanding of their properties and performance.
What is contact angle hystersis?
5 answers
Contact angle hysteresis refers to the phenomenon where the contact angle of a liquid on a surface varies between the advancing and receding contact angles due to surface roughness. This hysteresis is crucial in various applications like coating, painting, and flotation, providing friction to drops. The measurement of contact angle hysteresis is essential for understanding surface wettability. Research has shown that for materials with self-affine surface structures, the hysteresis force remains constant for different liquids and is dependent on the surface roughness factor. Factors such as surface roughness and droplet size play a significant role in determining the hysteresis behavior, with nanoscale roughness being particularly effective in influencing hysteresis.
What are the best surface roughness values for human cell adhesion?
5 answers
The optimal surface roughness values for human cell adhesion depend on various factors. Research suggests that moderate surface energy (Es ≈ 70 mJ m−2) and intermediate roughness ratio (r ≈ 2) are favorable conditions for efficient cell adhesion, growth, and proliferation. Additionally, it has been observed that the adhesion is lowest when the distance between roughness asperities is near the cell size. Furthermore, for titanium substrates, it is indicated that the scale length of observation should be a few times the cell size to highlight the influence of surface morphology on cell adhesion. These findings emphasize the importance of considering both surface energy and roughness parameters to optimize human cell adhesion on biomaterial surfaces.
How to enhance polycarbonate interfacial strength?
5 answers
To enhance the interfacial strength of polycarbonate (PC), various methods can be employed based on the research findings. One approach involves pre-coating polycarbonate nanoparticles (PC-NPs) on carbon fibers (CFs) to improve resin impregnation and interfacial adhesion in CF/PC composites. Another method includes surface modifications using undercoating, UV treatment, and low-temperature plasma to increase surface roughness and free energy, enhancing the interfacial adhesion strength between PC film and barrier layers. Chemical functionalization with silane coupling agents like GPTMS and APTMS significantly enhances adhesion properties, leading to a substantial increase in shear strength. Additionally, melt blending of thermally reduced graphene oxide (TRG) and PC can create enhanced interfacial interactions through chemical bonding and noncovalent interactions, improving the mechanical reinforcement of PC/TRG composites. These methods collectively offer effective strategies to boost the interfacial strength of polycarbonate materials.
What is the role of calcium carbonate in the production of building blocks?
5 answers
Calcium carbonate plays a crucial role in the production of building blocks by being a key component in the production process. In the context of environmental protection, the production process involves reacting CO2 with steel slag at specific temperatures and pressures to create building blocks, where calcium carbonate is a result of this reaction. Additionally, calcium carbonate is utilized in the controlled synthesis and surface modification of materials, leading to the development of nanostructured materials with enhanced properties for applications in biomaterials, biomedicine, environmental remediation, and energy production. Furthermore, in the context of a calcium carbonate production device, the chemical reaction of lime with distilled water generates calcium hydroxide, which is then converted into relatively pure calcium carbonate for use in various applications, including building blocks.
Why the graph of remaining starch throughout the incubation time is not linear?
5 answers
The non-linear behavior observed in the graph of remaining starch throughout the incubation time can be attributed to various factors. Enzyme concentration plays a crucial role in this non-linearity, as higher concentrations can lead to enzyme molecules concentrating more on the carrier surface rather than inside the pores, affecting reactivity. Additionally, the use of a two competing substrates Michaelis–Menten scheme with enzyme inhibition by-products in enzymatic hydrolysis modeling can introduce non-linear dynamics, providing insights into rapidly and slowly digested starch fractions. Furthermore, the method used for measuring residual starch, such as enzymatic or acid hydrolysis, can impact the accuracy of starch content estimation in fractionated samples, potentially contributing to non-linear trends in the data.
How biochar can be modified with surfactant?
5 answers
Biochar can be modified with surfactants to enhance its adsorption capabilities for various applications. Surfactant modifications, such as using sodium dodecylbenzene sulfonate (SDBS) or sodium dodecyl sulphate (SDS), have been shown to improve the surface properties of biochar, increasing its adsorption capacity for contaminants like methylene blue (MB) dyes. The addition of surfactants creates more active sites on the biochar surface, leading to enhanced adsorption performance. Furthermore, surfactant-modified biochar can exhibit improved hydrophobicity and waterproof abilities, making it suitable for applications like reducing rainwater infiltration in landfills. These modifications highlight the versatility of biochar in environmental remediation and waste management through surfactant-based enhancements.
What is enzyme?
4 answers
Enzymes are biological catalysts made up of proteins that accelerate biochemical reactions. They are specific in action, influenced by substrate concentration, temperature, and pH. Enzymes can be sourced from microorganisms, plants, and animals, with microbial enzymes being more versatile due to their tolerance to various conditions. Enzymes play a crucial role in various industries like food, pharmaceuticals, textiles, polymers, and paper, aiding in the manufacturing process and speeding up reactions. In the food industry, enzymes are utilized for tasks such as inhibiting microorganisms, enhancing product properties, and extending shelf life through innovative techniques like enzymatic active packaging. Enzymes are pivotal in biotechnological processes, driving complex reactions efficiently under controlled conditions, making them indispensable for enhancing human health and various industrial applications.