The self-assembly of two new types of stable hydrogen-bonded supramolecular aggregates-bisrosettes-that are based on parallel, connected CA3.M3 rosettes is reported. The minimization of intermolecular steric hindrance-peripheral crowding within the aggregate-is proposed as the structural feature responsible for selecting the cyclic CA3'M3 rosette over competing linear hydrogen-bonded networks a...

The hydrogen diffusion behavior in a tempered martensitic steel sheet with 1-GPa grade tensile strength was investigated using newly developed visualization technique an Ir complex, whose color changes from yellow to orange due its reaction hydrogen. Hydrogen permeation through the could be monitored via change of complex. Furthermore, breakthrough time specimen qualitatively evaluated based on...

Reactive oxygen and nitrogen species (RONS) are involved in many biochemical processes, including nitro-oxidative stress that causes cancer cell death, observed therapies such as photodynamic therapy cold atmospheric plasma. However, their mechanisms of action selectivity still remain elusive due to the complexity biological cells. For example, it is not well known how RONS generated by permeat...

In this study, an electrochemical hydrogen permeation experiment was used to determine the diffusion parameters, and a microprint test visualize distribution of in X65 pipeline steel with different levels cold deformation. The curves show that both current density effective coefficient decrease increasing reversible irreversible traps is calculated from it found amount increases deformation, es...

The enhancing effect of ascorbic acid and triethyl citrate (TEC) on the in vitro skin permeation of rofecoxib across rat epidermis was investigated. Skin pre-treatment with ascorbic acid and TEC at different concentrations, followed by application of rofecoxib gel, showed higher permeation flux than the control condition. The mechanism underlying this permeation enhancement was probed with four...

Wet/dry cyclic corrosion tests were conducted to investigate the effect of relative humidity (RH) at dry periods on hydrogen permeation behavior steel. Steel specimens exposed a temperature and humidity-controlled environment with an initial placement NaCl droplet. The RH period was controlled 20%, 55%, 60%, 65%, which lower than deliquescence (75%). Hydrogen current detected using electrochemi...

Hydrogen absorption b y series of palladium alloys with s e v c d other metals has nou: b p e r i quite c.xtcnsiwIy invesligated with rcjference to systematic alterations o,f pressurrco m p os i t io n o t h e r rrlated thermodynamic factors and 2: a r io us p a r a rn P t e r s . Ilydrogen permeation has b r w i an important area o,f both academic rind technological intercJst with relation, f ...

Novel cermet (i.e., ceramic-metal composite) membranes have been developed for separating hydrogen from product streams that are generated during coal gasification, methane partial oxidation, and watergas shift reactions. The hydrogen permeation rate in the temperature range of 600-900°C has been measured for three classes (ANL-1, -2, and -3) of cermet membranes. ANL-3 membranes provided the hi...