Biointerfaces

Biointerfaces play a major role in biocompatibility, drug delivery, biofilm formation,healing processes or cancer research. The characterization of the elementary reaction steps is accessible by XPS, especially due to its surface sensitivity. But drying of biomaterials also change the processes signifcantly. Thus NAP-XPS ist perfectly suited to contribute to this field of research.

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APPLICATION NOTES

XPS surface analysis of a leaf with EnviroESCA
XPS surface analysis of a leaf with EnviroESCA
This application note presents the application of EnviroESCA to the field of biology and surface spectroscopy of biological samples. X-ray Photoelectron Spectroscopy (XPS) measurements on different sites of a leaf will be discussed. It will be shown that XPS is able to detect residues of calcium chloride, being used as a fertilizer, on the leafs surface.
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XPS surface chemical analysis of bacterial samples with EnviroESCA
XPS surface chemical analysis of bacterial samples with EnviroESCA
This application note presents how EnviroESCA can be used to analyze bacterial samples under near ambient pressure conditions in various states of hydration using different levels of humidity. Such investigations of bacterial cell wall surfaces in their hydrated state are essential for studying biological interfaces at work.
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XPS surface analysis of cuttlefish bone samples with EnviroESCA
XPS surface analysis of cuttlefish bone samples with EnviroESCA
Biological mineral samples from a cuttlefish (sepia) were studied using EnviroESCA. The results of surface chemical analysis of the native and ion implantation treated samples are presented. Neutralization of the insulating biomaterial is accomplished by Environmental Charge Compensation enabling X-ray Photoelectron Spectroscopy (XPS) on tissue samples.
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XPS surface analysis of human tooth samples with EnviroESCA
XPS surface analysis of human tooth samples with EnviroESCA
Human teeth from an adult and a baby were studied using EnviroESCA. The results of surface chemical analysis of the as-received human tissues samples are presented. Neutralization of the insulating bio-material is accomplished by Environmental Charge Compensation enabling X-ray Photoelectron Spectroscopy (XPS) on tissues as tooth or bone.
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XPS surface analysis of a human urolith with EnviroESCA
XPS surface analysis of a human urolith with EnviroESCA
A single human urinary stone (urolith) was characterized using EnviroESCA. The result of surface chemical analysis of the as received samples is presented. Charge neutralization on this insulating material is accomplished by Environmental Charge Compensation.
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XPS surface analysis of Italian hard cheese with EnviroESCA
XPS surface analysis of Italian hard cheese with EnviroESCA
This application note presents how EnviroESCA can be used to analyze the surface of food samples, e.g., Italian hard cheese. Due to the advanced vacuum system of EnviroESCA the surface analysis of Food samples even in the presence of fat and oils or volatiles is performed without problems.
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XPS surface analysis of sesame seeds with EnviroESCA
XPS surface analysis of sesame seeds with EnviroESCA
Results of the surface analysis of untreated food samples, e.g., sesame seeds, measured with EnviroESCA are presented. High resolution and high quality spectra are recorded using Environmental Charge Compensation even for samples in bulk quantities.
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XPS surface analysis of a coffee bean with EnviroESCA
XPS surface analysis of a coffee bean with EnviroESCA
The Analysis of food and natural products under environmental conditions is of great importance due to their daily use and direct interaction with humans during consumption. In this study we investigated a roated coffee bean. Charge compensation of this insulating natural product is accomplished by Environmental Charge Compensation enabling X-ray photoelectron spectroscopy on such biological material with ease.
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EnviroESCA and NAP-XPS in the field of Cosmetic Science
EnviroESCA and NAP-XPS in the field of Cosmetic Science
This application note presents the application of EnviroESCA to the field of Cosmetic Sciences and Forensic Sciences. Near Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS) measurements on human hair treated with different personal hair care products.
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Near-ambient pressure XPS of hydrated Escherichia coli samples with EnviroESCA
Near-ambient pressure XPS of hydrated Escherichia coli samples with EnviroESCA
This application note presents how EnviroESCA can be used to analyze E. coli biofilms on silicon under near ambient pressure conditions in various states of hydration. Such investigations of the outer bacterial cell surface in their hydrated state are essential for studying biological interfaces at work.
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