In this contribution we investigate the impact of the fluid-air interface on the dissolved electrolyte Potassium hexacyanoferrate K4[Fe(CN)6] by infrared-visible sum-frequency generation spectroscopy (SFG) and surface tension measurements. SFG is a surface specific nonlinear optical technique that records the vibrational spectrum of the adsorbed species with little to no contribution from the b...

Air temperature, ground surface temperature (GST; 0 cm at depth), precipitation and freezing depth data at 50 meteorological stations in the Qinghai–Tibet Plateau (QTP) were analyzed to examine changes of climate and seasonally frozen ground (SFG) in the past 30 years. The latitude, longitude, elevation, mean annual air temperature (MAAT), annual precipitation (AP) and maximum freezing depth at...

Inorganic salts in marine aerosols play an active role in atmospheric chemistry, particularly in coastal urban regions. The study of the interactions of these ions with water molecules at the aqueous surface helps to elucidate the role of inorganic cations and anions in atmospheric processes. We present surface vibrational sum frequency generation (SFG) spectroscopic and molecular dynamics (MD)...

The kinetics of proteins at interfaces plays an important role in biological functions and inspires solutions to fundamental problems in biomedical sciences and engineering. Nonetheless, due to the lack of surface-specific and structural-sensitive biophysical techniques, it still remains challenging to probe protein kinetics in situ and in real time without the use of spectroscopic labels at in...

Self-assembled foam-like graphene (SFG) structures were formed using a simple nucleate boiling method, which is governed by the dynamics of bubble generation and departure in the graphene colloid solution. The conductivity and sheet resistance of the calcined (400°C) SFG film were 11.8 S·cm(-1) and 91.2 Ω□(-1), respectively, and were comparable to those of graphene obtained by chemical vapor de...

Relative biodistribution of FDA-approved innovator and generic sodium ferric gluconate (SFG) drug products was investigated to identify differences in tissue distribution of iron after intravenous dosing to rats. Three equal cohorts of 42 male Sprague-Dawley rats were created with each cohort receiving one of three treatments: (1) the innovator SFG product dosed intravenously at a concentration...

Die Oberflächenstruktur von Metall-Nanopartikel auf Oxidträgern lässt sich über charakteristische Schwingungen adsorbierten Sondenmolekülen wie CO bestimmen. Üblicherweise konzentrieren spektroskopische Untersuchungen die Peak-Position und -Intensität, mit der Bindungsgeometrie bzw. Anzahl Adsorptionsplätze zusammenhängen. Anhand zweier unterschiedlich präparierter Modellkatalysatoren wird geze...

30 mW continuous wave ultraviolet radiation is generated via a two-path geometry for cascaded frequency doubling and sun-frequency generation (SFG) at 18.9 W pump, where SFG is enabled by a third-order periodically poled

BACKGROUND Military personnel deployed in field actvities report on frequent tick bites. Therefore they may run the risk of exposure to rickettsial organisms. METHODS In order to assess the risk of exposure to rickettsial organisms, two groups of military personnel who were deployed in field activities of Nothern Sri Lanka were investigated. The first group was studied in order to assess the ...

A coat to fit the body: Although protein adsorption onto surfaces is a complicated process, sum-frequency generation (SFG) spectroscopy probes the interfacial water structure around a silica surface as a model protein (bovine serum albumin, BSA) adsorbs onto it from solution. At pH 8.0, the attenuated SFG intensity after BSA adsorption indicates that interfacial water molecules are less ordered...