We consider the mechanical desorption of an infinitely long lattice polymer chain tethered at one end to an adsorbing surface. The external force is applied to the free end of the chain and is normal to the surface. There is a critical value of the desorption force f(tr) at which the chain desorbs in a first-order phase transition. We present the phase diagram for mechanical desorption with exa...

BACKGROUND Most published literature using SELDI-TOF has used traditional techniques in Spectral Analysis such as Fourier transforms and wavelets for denoising. Most of these publications also compare spectra using their most prominent feature, i.e, peaks or local maximums. METHODS The maximum intensity value within each window of differentiable m/z values was used to represent the intensity ...

Sorption of TCE to the caliche soil exhibited linear isotherm at the high TCE concentrations (Co=122-1300 mg L(-1)) but Freundlich isotherm at the low concentration range (1-122 mg L(-1)). Sorption strength of the carbonate fraction of the soil was about 100-fold lower than the sorption strength of soil organic matter (SOM) in the caliche soil, indicating weak affinity of TCE for the carbonate ...

Here we present a systematic study of the adsorption and laser induced desorption of CO, NO and CO + NO from a Pd(111) surface at a number of different coverages. We begin by characterising the surfaces using reflection-absorption infrared spectroscopy (RAIRS) and temperatureprogrammed desorption (TPD). Experiments show that NO displaces pre-adsorbed CO considerably, but that CO has a much smal...

The ability to accurately determine metal mercury content and identify different mercury species in solid samples is essential for developing remediation and control strategies. The aim of the present study is to characterize mercury compounds based on thermal desorption. For this purpose a series of samples was prepared and the operational parameters-heating velocity, carrier gas-were optimize...

Abstract Heat and Moisture Transfer (HMT) simulations are used to evaluate moisture related damage risks in building envelopes. HMT commonly performed accepting the hypothesis of not considering hysteresis materials. The results simulation a timber wall with presented, compared three simplified models, showing effects on assessment risk decay. content is most influenced variable, while temperat...

Microchip electrophoresis is used (i) to assign structures of serum N-glycans and (ii) quantitatively compare samples derived from ovarian cancer patients and disease-free (control) individuals. Neutralization of native charges from sialic acids present on serum N-glycans allowed direct correlation between electrophoretic mobility and glycan mass. From a calibration curve of the masses and mobi...

A novel time-of-flight mass calibration method has been developed. In contrast to conventional methods, where the relationship between ion flight time and mass is an arbitrary polynomial equation, this method is based on the physics of ion motion. Parameters needed to describe the physics are numerically optimized using a simplex algorithm. Once these parameters are established, unknown masses ...

The purpose of the investigation is to analyze the pros and cons of existing sorption models, as well as experimental methods. In addition, it summarizes existing sorption data in order to understand the phenomenon of VOC sorption on building materials better and to direct future research. We found that existing sorption models can be generally classified into either first order adsorption/deso...