scispace - formally typeset
Search or ask a question

Answers from top 6 papers

More filters
Papers (6)Insight
The results indicate that the support influences the stability of palladium NPs.
In view of palladium contaminants and their adverse effects on human health, it is valuable to develop an effective probe for palladium.
The result of a loading test suggests that palladium is extracted as a 1:2 metal-reagent complex.
The results are consistent with a physical mechanism of modification by palladium.
Based on these results a scheme has been proposed for the recovery of palladium from HLLW.
The method proved to be successful in determination of palladium in the intermetallides and resistor.

See what other people are reading

Is there a method to measure material extraction, digital economy and environment?
5 answers
A method for measuring material extraction, digital economy, and the environment involves utilizing indicators such as intensity of use (IU), economy-wide material flow accounting (EW-MFA), material footprint (MF) analysis, and impact-based indicators. This approach allows for monitoring material efficiency and productivity, tracing material cycles, and assessing the environmental, social, and economic impacts of material use. Additionally, advancements in technology enable scanning and measuring environments in three dimensions, providing detailed visual representations of the surroundings. Empirical evaluations based on data from various countries suggest that despite a decrease in economic intensity, global material extraction continues to rise, with developed countries benefiting from import surpluses and unequal ecological exchange patterns influencing material consumption and extraction dynamics. Integrating these methods and insights can offer a comprehensive understanding of material extraction, digital economy interactions, and their environmental implications.
What is the method for raw fiber analysis?
4 answers
The method for raw fiber analysis involves various techniques as outlined in the provided research contexts. One approach utilizes a neural network to evaluate impurities in fibrous materials like raw cotton by irradiating the material with different wavelengths and processing images through the network. Another method focuses on determining the ratio of components in fibers, particularly hydrophobic and thermoplastic components. Additionally, a technique for determining raw cellulose in vegetable products involves extraction with sulphuric acid and caustic potassium solutions followed by washing and precipitation. Furthermore, an identification method for recycled protein fibers utilizes stable isotope delta15N tracking to establish discriminant models for accurate source identification. These diverse methods collectively contribute to the comprehensive analysis of raw fibers.
How does nanotechnology affect the properties of materials and what are some practical applications?
5 answers
Nanotechnology significantly impacts material properties by enhancing functionalities and performance. For instance, in building materials like cement mortar, nanomaterials such as nano-silica and nano-alumina improve fresh-state properties like setting time and workability, while enhancing hard-state properties including strength and durability. In cancer diagnosis and treatment, nanoparticles offer targeted drug delivery, controlled release, and intrinsic anticancer activity, improving efficacy with fewer side effects. Moreover, nanomaterials in food packaging enhance durability, resistance, and processing ease, ensuring food freshness and quality while adhering to safety regulations. These applications demonstrate how nanotechnology revolutionizes material properties across various sectors, from construction to healthcare and food packaging.
How Biosynthesis of Nanomaterials effectively used on Photocatalytic Removal of Organic Compounds?
5 answers
Biosynthesis of nanomaterials offers a promising approach for the photocatalytic removal of organic compounds due to its cost-effectiveness, eco-friendliness, and efficiency. These biogenic nanomaterials, derived from natural sources like plants and algae, exhibit unique characteristics such as high surface area, reusability advantages, and enhanced photocatalytic performance. By utilizing green synthesis routes, these nanomaterials can efficiently degrade various organic pollutants found in industrial wastewater, including dyes, pharmaceuticals, and heavy metal ions. The use of biogenic nanomaterials not only addresses environmental concerns but also ensures safer treatment of contaminants, leading to the production of harmless by-products like water and carbon dioxide. Overall, the biosynthesis of nanomaterials presents a sustainable and effective solution for the photocatalytic removal of organic compounds from polluted water systems.
How extraction maceration of mente secondary metabolites?
5 answers
Maceration is a common method used for the extraction of secondary metabolites from plant material. Different solvents and extraction times can influence the yield and profile of various classes of secondary metabolites. For example, a study on Rumex alpinus, Glycine max, Chaerophyllum bulbosum, Anthriscus sylvestris, Lupinus albus, and Artemisia absinthium found that a compromise extraction solvent for various compounds is 80% methanol mixed with plant material, with maceration lasting six hours and repeated four times with fresh solvent. Additionally, the extraction of bioactive compounds from plant tissues can benefit from innovative technologies like high hydrostatic pressure, ultrasound, pulsed electric field, and supercritical fluid extraction, which offer higher extraction rates, lower impurities, and preservation of thermo-sensitive compounds. These methods provide efficient and sustainable ways to extract bioactive compounds from plants.
What is the mechanism of antioxidant activity of mushroom polysaccharide?
5 answers
The mechanism of antioxidant activity of mushroom polysaccharides involves their ability to scavenge various reactive oxygen and nitrogen species (RONS) through different pathways. Mushroom polysaccharides, such as those from Pleurotus eryngii and Lentinula edodes, have been shown to exhibit antioxidant properties by effectively scavenging radicals like DPPH, superoxide, hydroxyl, and nitric oxide. These polysaccharides also demonstrate reducing power against radicals and inhibit lipid peroxidation, showcasing their protective effects against oxidative stress. The antioxidant activity of mushroom polysaccharides is attributed to their composition of α and β glycosidic bonds with specific sugar residues, which contribute to their ability to scavenge reactive species in a concentration-dependent manner. Overall, mushroom polysaccharides act as natural antioxidants by neutralizing harmful free radicals and protecting cells from oxidative damage.
What is synthesis of cyclophane-braced peptide macrocycles via palladium-catalysed intramolecular sp3 C−H arylation?
5 answers
The synthesis of cyclophane-braced peptide macrocycles via palladium-catalyzed intramolecular sp3 C−H arylation involves utilizing transition-metal-catalyzed C−H activation strategies to create unique peptide topologies. Recent advancements in C−H activation, particularly C−H arylation, have shown significant progress in this area. By cross-linking aromatic side chains of Trp, His, and Tyr residues with aryl linkers through copper-catalyzed double heteroatom-arylation reactions, diverse assemblies of tension-bearable multijoint braces can be formed to modulate the backbone conformation of peptides, leading to previously inaccessible conformational space. Additionally, the direct synthesis of polyketide and polypeptide macrocycles via transition-metal-catalyzed C−H bond activation strategies has been explored, showcasing the potential for innovative approaches in macrocyclization.
What is electrochemical OCP method to study corrosion behavior of Mg alloys in corrosive solutions?
10 answers
The electrochemical Open Circuit Potential (OCP) method is a widely used technique for studying the corrosion behavior of magnesium (Mg) alloys in various corrosive solutions. This method involves measuring the steady-state potential of a corroding metal or alloy in an electrolyte without applying any external current. The OCP value provides insights into the thermodynamic tendency of the metal to corrode in the given environment. Research on Mg alloys has demonstrated the application and significance of OCP measurements across different corrosive media and alloy compositions. For instance, studies have shown that the corrosion rates of Mg alloys can vary significantly with the composition of the corrosive solution, such as NaCl, Na2SO4, and molten salts, as well as with the alloy's microstructural characteristics. The OCP method has been instrumental in identifying the electrochemical activity and corrosion initiation points on Mg alloys in chloride-containing solutions, where the corrosion process was observed to initiate locally and propagate over the surface. Similarly, the OCP measurements have highlighted the influence of fluoride ions in forming protective MgF2 films on Mg alloys, leading to a continuous increase in weight due to the corrosion product layer formation. Moreover, the OCP method has been applied to evaluate the corrosion resistance of Mg alloys with different treatments and microstructures, such as as-cast, solid-solution treated, and as-extruded alloys, revealing how microstructural changes can impact corrosion behavior. In biomedical applications, the OCP measurements have provided valuable data on the corrosion resistance of Mg alloys in simulated body fluids, aiding in the development of Mg-based biomaterials. Additionally, the OCP method has been used to assess the effectiveness of surface treatments and coatings in improving the corrosion resistance of Mg alloys. For example, sol-gel coatings on Mg alloys have been shown to significantly enhance corrosion resistance by sealing surface defects and cracks, as evidenced by OCP measurements. In summary, the OCP method serves as a crucial tool in understanding the corrosion mechanisms of Mg alloys, guiding the optimization of alloy compositions, microstructures, and surface treatments to enhance their corrosion resistance in various environments.
Why crude aspirin insoluble?
5 answers
Crude aspirin is insoluble due to its poor aqueous solubility. This limitation affects its dissolution properties in biological systems, impacting its bioavailability. Various techniques have been explored to enhance the solubility of aspirin, such as cocrystallization with coformers like benzoic acid, and production of micronized aspirin and aspirin/polyethylene glycol 4000 composites. Additionally, forming complexes of aspirin with phosphoric acid has been studied to improve its solubility and bioavailability. These studies highlight the importance of addressing the solubility issues of aspirin through different methods to enhance its therapeutic effectiveness.
Why does polycarbonate have high resistance to high temperatures?
5 answers
Polycarbonate exhibits high resistance to high temperatures due to various factors outlined in the research papers. The addition of PBT in polycarbonate forms a PC/PBT alloy, enhancing solvent resistance. Incorporating high-temperature-resistant resins and specific compatibilizers in the composition improves heat resistance, making the PC/PBT alloy equivalent to pure PC in terms of heat resistance. Furthermore, the use of specific high-temperature-resistant resins significantly elevates the heat-resistant temperature of polycarbonate, enabling its application in environments with ultrahigh heat-resistant requirements. Additionally, the utilization of modified graphene oxide in polycarbonate enhances material system compatibility and prevents degradation under high-temperature conditions, thereby improving heat resistance. These factors collectively contribute to polycarbonate's exceptional resistance to high temperatures.
Isolating lipopeptides from the secretome of Salmonella with experimental design and various biochemical techniques.
5 answers
Isolating lipopeptides from the secretome of Salmonella involves overcoming challenges such as complex mixtures and impurities. Various biochemical techniques like acid precipitation, solvent extraction, and filtration are traditionally used for lipopeptide isolation. New methods are being explored to enhance purity, with one study focusing on a new purification method resulting in a colorless, impurity-free product with improved emulsifying activity. Synthetic lipopeptides are also being developed for pharmaceutical applications, offering a solution to the limitations of microbial lipopeptide isolation. These synthetic lipopeptides are synthesized through multi-step processes, characterized using analytical tools, and evaluated for biocompatibility, showing promise for drug delivery systems. Overall, advancements in purification methods and synthetic lipopeptide development are crucial for efficient isolation and application of lipopeptides from Salmonella secretome.