Water borated polyethylene gamma radiation?4 answersBorated polyethylene has been utilized in various applications involving gamma radiation. Studies have explored its effectiveness in neutron-gamma detection systems, as well as in estimating neutron ambient dose equivalent through prompt gamma emissions. Additionally, the sterilization effects of gamma irradiation on water stored in PET bottles have been investigated, showing that a 5 kGy dose is suitable for microbial sterilization with minimal impact on leaching of phthalates compounds. Furthermore, hydrogels based on polyethylene oxide (PEO) have been developed using gamma radiation, demonstrating improved swelling properties and mechanical strength with the incorporation of acrylic acid or N,N-dimethylacrylamide. Overall, these studies highlight the diverse applications and benefits of utilizing borated polyethylene and gamma radiation in various fields, ranging from radiation detection to water sterilization and hydrogel synthesis.
How Polyvinyl acetate polymer used in radiation shielding?5 answersPolyvinyl alcohol (PVA) polymer, not Polyvinyl acetate, is extensively utilized in radiation shielding applications due to its ability to be composited with various materials to enhance shielding properties. Studies have shown that PVA composites with materials like lead iodide, cadmium nitrate, molybdenum nanoparticles, and nanoparticles like AgCl and SnO2 exhibit excellent gamma, neutron, and charged particle shielding capabilities. These composites demonstrate increased mass attenuation coefficients, reduced mean free paths, and improved radiation shielding capacities compared to conventional materials like lead. Additionally, the incorporation of different dopants or nanoparticles into PVA matrices enhances the structural, thermal, optical, electrical, and linear optical properties of the resulting nanocomposites, making them effective and lightweight options for radiation protection.
How does the radioactivity of boron in water affect human health?4 answersThe radioactivity of boron in water does not appear to be directly addressed in the provided abstracts. None of the abstracts specifically mention boron as a radioactive element or discuss its impact on human health. Therefore, there is no information available in the provided abstracts to answer the question about the effects of boron radioactivity in water on human health.
Benefits of boron?5 answersBoron has been shown to have numerous health benefits. It plays a role in the repair and regeneration of injured tissue, and has a potential role in cardiac tissue regeneration after injury. Boron is essential for growth and has pleiotropic effects, ranging from anti-inflammatory and antioxidant effects to the modulation of different body systems. It is important for maintaining animal health, preventing nutritional disorders, and enhancing immune function. Boron promotes bone health, brain function, and modulates the immune or inflammatory response. It also affects hormone action and is associated with a reduced risk for some types of cancer. An intake of less than 1.0mg/day inhibits the health benefits of boron, so it is recommended to consume a diet rich in fruits, vegetables, nuts, and pulses to increase boron intake.
How does the addition of boron affect the radiation shielding capabilities of concrete?5 answersThe addition of boron to concrete improves its radiation shielding capabilities. Boron-containing compounds, such as boron carbide (B4C), have excellent shielding capabilities against slow neutrons. The presence of boron carbide in concrete mixes leads to significant improvements in concrete strength and neutron shielding capabilities. Boron also enhances the attenuation properties of concrete against thermal and fast neutrons. Boron compounds, such as boric acid, can be combined with other materials like serpentine to produce radiation-shielding concrete (RSC). The addition of boric acid to serpentine concrete hinders cement hydration and negatively affects the mechanical properties of the concrete. However, it enhances the attenuation properties of the concrete against thermal and fast neutrons. Overall, the addition of boron to concrete improves its ability to shield against radiation, particularly neutrons.
Can boron be removed from water using membrane? how can ZIF-8 or ZIF-67 improve the process?5 answersBoron can be effectively removed from water using membrane processes, such as reverse osmosis (RO) and nanofiltration (NF) membranes. The selection of suitable membrane materials is crucial for efficient boron removal. Covalent organic frameworks (COFs) with hydroxyl (-OH) groups in their pores have shown improved boron removal capabilities without compromising water permeability. Another approach is the use of zeolitic imidazolate frameworks (ZIFs), such as ZIF-8 and ZIF-67. ZIF-8 has been used as a template to prepare a composite material with canola straw-derived biochar (BC), which exhibited enhanced boron adsorption capacity. ZIF-8 and silver nanoparticle incorporated ZIF-8 (Ag/ZIF-8) membranes have also been developed and demonstrated excellent performance in organic dye removal and antimicrobial activity. These findings highlight the potential of ZIF-8 and ZIF-67 in improving the boron removal process through their unique porous structures and tunable compositions.