In the current context of finding plant alternatives to animal proteins, pea would be a good option regarding its high protein content and well-balanced amino acid (AA) profile. However, we must examine digestibility, main criteria nutritional quality. The aim this study was determine real ileal AA nitrogen (N) digestibility (RIDAA RIDN) as compared milk casein in humans. We also evaluated thei...

Isotopic analysis is an efficient method for quality control and detection of counterfeit food products. The elemental isotope ratio mass spectrometry (hereinafter referred to as EA-IRMS) traditionally used in the field isotopic products regulated relevant regulatory documents. combustion module-cavity ring-down spectroscopy CM–CRDS) a rapidly developing measuring carbon with number advantages;...

The assimilation (uptake or immobilization) of inorganic nitrogen (N) and the production of ammonium (NH(4)(+)) from organic N compounds are universal functions of microorganisms, and the balance between these two processes is tightly regulated by the relative demands of microbes for N and carbon (C). In a heterogeneous environment, such as soils, bulk measurements of N mineralization or immobi...

Acetic acid is the main ingredient of vinegar, and the worth of vinegar often depends on the fermentation of raw materials. In this study, we have developed a simple and rapid method for discriminating the fermentation of the raw materials of vinegar by measuring the hydrogen and carbon isotope ratio of acetic acid using head space solid-phase microextraction (HS-SPME) combined with gas chromat...

A fully automated system for the determination of δC and δO in atmospheric CO has been developed. CO is extracted from an air sample and converted into carbon dioxide (CO2) using the Schütze reagent. The isotopic composition is determined with an isotope-ratio mass spectrometer (IRMS) technique. The entire system is continuously flushed with high-purity helium (He), the carrier gas. The blank s...

Multi-isotope fingerprinting (sulphur, oxygen and strontium isotopes) has been tested to study the provenances of medieval and Renaissance French and Swedish alabaster artwork. Isotope signatures of historical English, French and Spanish alabaster source quarries or areas reveal highly specific, with a strong intra-group homogeneity and strong inter-group contrasts, especially for Sr and S isot...

Green coffee bean isotopes have been used to trace the effects of different climatic and geological characteristics associated with the Hawaii islands. Isotope ratio mass spectrometry (IRMS) and inductively coupled plasma mass spectrometry ((MC)-ICP-SFMS and ICP-QMS) were applied to determine the isotopic composition of carbon (δ13C), nitrogen (δ15N), sulfur (δ34S), and oxygen (δ18O), the isoto...

The measurement of the oxygen stable isotope content in organic compounds has applications in many fields, ranging from paleoclimate reconstruction to forensics. Conventional High-Temperature Conversion (HTC) techniques require >20mg of O for a single dOmeasurement. Here we describe a system that converts the CO produced by HTC into CO2 via reduction within a Ni-furnace. This CO2 is then concen...

Objectives: The δ15N, δ13C, and δ2H profile of the ephedrine as a methamphetamine precursor is fingerprint to describing its origin. origin one supporting data in profiling. In this research, isotope profiles natural, synthetic, semi-synthetic clusters were established. These applied predict from seized samples Indonesia. Methods: clustered two steps. Initially, pseudoephedrine various prepared...