Intramolecular Charge Transfer and Spin-Orbit Coupled Intersystem Crossing in Hypervalent Phosphorus(V) and Antimony(V) Porphyrin Black Dyes.

Porphyrin dyes with strong push-pull type intramolecular charge transfer (ICT) character and broad absorption across the visible spectrum are reported. This combination of properties has been achieved by functionalizing the periphery of hypervalent and highly electron-deficient phosphorus(V) and antimony(V) centered porphyrins with electron-rich triphenylamine (TPA) groups. As a result of the large difference in electronegativity between the porphyrin ring and the peripheral groups, their absorption profiles show several strong charge transfer transitions, which in addition to the porphyrin-centered π → π* transitions, make them panchromatic black dyes with high absorption coefficients between 200 and 800 nm.

pH-sensitive docetaxel-loaded chitosan/thiolated hyaluronic acid polymeric nanoparticles for colorectal cancer.

This study aimed to develop and evaluate pH-sensitive docetaxel-loaded thiolated hyaluronic acid (HA-SH) nanoparticles (NPs) for targeted treatment of colon cancer. HA-SH, synthesized via oxidation and subsequent covalent linkage to cysteamine, served as the precursor for developing HA-SH NPs through polyelectrolyte complexation involving chitosan and thiol-bearing HA. HA-SH NPs displayed favorable characteristics, with small particle sizes (184-270 nm), positive zeta potential (15.

Radiation Protection of a 3D Computer Tomography Scanning Workplace for Logs-A Case Study.

Despite its undeniable advantages, the operation of a CT scanner also carries risks to human health. The CT scanner is a source of ionizing radiation, which also affects people in its surroundings. The aim of this paper is to quantify the radiation exposure of workers at a 3D CT wood scanning workplace and to determine a monitoring program based on measurements of ionizing radiation levels during the operation of a CT log scanner.

Impact of using magnetic water on the micro structure of leached saline-sodic soil.

Structural changes in the porous media are critical in evaluating the soil pore system and other physical properties of leached soil. In this work, the combination of selected physical parameters such as bulk density and hydraulic conductivity with images of scanning electron microscopic (SEM) was used to study the impact of five levels (1, 3, 5, 7, and 9 magnets) of magnetically treated water (MTW) on the structural changes in pore spaces of leached high saline-sodic soil, compared with leached soil with non- magnetically treated water (NMTW) and unleached soil. Results show that leaching saline-sodic soil with MTW leads to a remarkable increase in soil pore network as confirmed by SEM observations and ImageJ software program.