Abstract Owing to their competitive price, ease of processability, and rust resistance, polymers are the most extensively used materials in everyday life. However, consistent exposure ultraviolet (UV) radiation can lead degradation discoloration polymeric materials. Various polymer composites containing inorganic organic nanoparticles (NPs) have been developed improve UV‐shielding properties ne...

With wood regaining substantial interest as a construction material due to sustainability concerns and aesthetics trends, efficient safe protection methods are needed prevent the discouloration loss of mechanical properties this renewable UV-sensitive material. In study, sustainable coatings comprising 0 20 wt% biocarbon (BC) dispersed in tung oil were developed for protection. BC particles add...

................................................................................................................................... iv 1.0 Introduction ...................................................................................................................... 1 2.0 Basic Concepts in Radiation Protection and Shielding .................................................... 1 2.1 Shieldin...

425 PERSPECTIVES self-shielding (9– 11). The principle is similar to that of laser isotopic separation of gases, but uses either interstellar ultraviolet (UV) radiation or the light of the growing Sun. In either case, UV radiation dissociates CO molecules. However, owing to the abundance of C 16 O molecules, the radiation penetrating the system runs out of photons capable of breaking up this is...

Introduction: The affinity of oxygen for both gaseous and solid phases makes it and its isotopes important tracers of redox conditions and isotopic reservoirs in the solar nebula. The oxygen fugacity (fO 2) recorded by chondritic meteorites ranges over several orders of magnitudes, from very high values needed to explain such minerals as ferrous olivine in ordinary and carbonaceous chondrites t...

background: monte carlo simulations play a vital role in the calculation of the necessary shielding both for neutrons and photons. advanced and simple shielding materials against neutron and gamma rays were compared by simulation using the mcnb4b monte carlo code. the simulations were carried out for the three common neutron sources, namely the 252cf, the 241am/be and the dd neutron generator w...

Uncontrolled exposure to X-band frequency leads to health damage. One of the principles of radiation protection is shielding. But, conventional shielding materials have disadvantages. Therefore, studies of novel materials, as an alternative to conventional shielding materials, are required to obtain new electromagnetic shielding material. Therefore, this study investigated the electromagnetic s...

Ultraviolet (UV) radiation-induced loss of dermal extracellular matrix is associated with skin photoaging. Recent studies demonstrated that keratinocyte-releasable stratifin (SFN) plays a critical role in skin collagen metabolism by inducing matrix metalloproteinase 1 (MMP1) expression in target fibroblasts. In the present study, we examined whether SFN released from UVB-irradiated epidermal ke...