headspace analysis
Headspace analysis of natural yoghurt using headspace solid phase microextraction : a thesis presented in partial fulfilment of the requirements for the degree of Master of Philosophy in Food Technology at Massey University (Turitea Campus), Palmerston North, New Zealand
... The results suggested that the two methods were complementary in that the SH method extracted the more volatile compounds acetaldehyde, acetone and 2-butanone whereas, the HS-SPME method[r] ...
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Headspace analysis of volatile metabolites of Pseudomonas aeruginosa and related species by gas chromatography mass spectrometry
... Gas chromatographic-mass spectrometric analysis of headspace volatiles was performed on cultures of 11 strains of Pseudomonas aeruginosa and 1 strain each of Pseudomonas cepacia, Pseudom[r] ...
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Headspace analysis of natural yoghurt using headspace solid phase microextraction : a thesis presented in partial fulfilment of the requirements for the degree of Master of Philosophy in Food Technology at Massey University (Turitea Campus), Palmerston North, New Zealand
... The main objective of this study was to devise a methodology for the Headspace Solid Phase Microextraction HS-SPME technique to investigate and quantify six flavour analytes in natural, [r] ...
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Fermentative activity of promising yeasts for cereal based beverages using CO2 headspace analysis
... the headspace of vials containing Malt Extract broth diluted to 15%; this medium was used as a model system to simulate a beverage containing a low amount of ...
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Pilot Study of the SCFA Headspace Analysis of Streptococcus mutans Metabolites in Media with and without Polyols
... Figure 1. Headspace-GCMS representative chromatograms -- (a) Standard mix containing five short chain fatty acids and three analogs. Inset table shows retention time and m/z of each component. (b) Positive control ...
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Cultured skin microbiota attracts malaria mosquitoes
... Although blood agar alone was attractive to the mosqui- toes, the microbiota mixture used in this study caught sig- nificantly more mosquitoes than sterile blood agar, and it is therefore concluded that the volatiles ...
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SPME Method Optimized by Box-Behnken Design for Impact Odorants in Reduced Alcohol Wines Bithika Saha 1,2,3 , Rocco Longo 1,2,4 , Peter Torley 1,2,5 , Anthony Saliba 1,6 and Leigh Schmidtke 1,2
... A negative relationship between ethanol concentration and most analyte responses during the SPME sampling process is apparent and the confounding impact of competition for SPME binding sites between ethanol and other ...
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IMPROVED ANALYTICAL METHOD FOR ESTIMATION OF ESSENTIAL OIL IN DRUG OINTMENT THROUGH RAPID STATIC CHROMATOGRAPHY HEADSPACE FOR QUALITY CONTROL ANALYSIS
... a headspace gas chromatographic method for the determination of residual solvents in arterolane (RBx11160) maleate bulk ...GC. Headspace analysis in modern gas ...
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The Effects of Protein Concentration and Temperature on Flavor Delivery of 2,4-Dimethylbenzaldehyde and Ethyl Butyrate in Whey Protein Isolate Solutions
... static headspace analysis involves a sample, liquid or solid, that is enclosed in a sealed vessel and allowed to equilibrate for a period of time to allow flavor volatiles to partition between the sample ...
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Gram-negative and -positive bacteria differentiation in blood culture samples by headspace volatile compound analysis
... the analysis of VCs in the headspace of anaerobic blood culture samples origi- nating from an unselected patient population has the potential to differentiate between Gram-negative and -positive bacteria ...
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Development and Validation of Static HS-GC Method for the Determination and Quantification of Residual Solvents of Bromhexine Hydrochloride (BHX)
... usingstatic headspace gas chromatography (HSGC) gained preferenceand popularity over the direct injection GC because of various complicationsand disadvantages caused by the direct injection of theAPI into the GC ...
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Impact of protein, lipid and carbohydrate on the headspace delivery of volatile compounds from hydrating powders
... the headspace is driven by the change in polarity of the matrix, which may have included the formation of emulsion droplets or surface oil (although free oil could not be visibly ...
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Regenerated desiccant devices for cooling stored grains
... that the calculated grain temperatures agree with the recorded data very well along the centerline of the silo and the more accurate methods of simulating the headspace and the wall of[r] ...
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FUMIGANT TOXICITY OF MELALEUCA LEUCADENDRON L. AND HYPTIS SUAVEOLENS L. ESSENTIAL OILS AGAINST PLUTELLA XYLOSTELLA L. (LEPIDOPTERA: YPONOMETIDAE)
... This study demonstrated that headspace of EO extracted from leaves of H. suaveolens and M. leucadendron were highly toxic to P. xylostella larvae. Overall, even if it is not easy to determine which are the ...
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Proof of bacteria and the activity of chemical and natural antibiotics by headspace gas chromatography
... by headspace gas chromatography and to investigate the efficacy of chemical antibiotics and of natural compounds with antimicrobial ...closed headspace vials and obligate anaerobes too, if the air above the ...
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Headspace delivery of limonene from the serum and non serum fractions of orange juice in vitro and in vivo
... time analysis of gas-phases above food samples and in the gas phase within the nasal cavity during consumption (Linforth & Taylor, 2000; Rabe, Linforth, Krings, Taylor, & Berger, 2004; Tsachaki, Linforth, ...
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Analysis of Fireground Contamination of Firefighting Turnouts using Headspace Sampling-Gas Chromatography-Mass Spectrometry (HS-GC-MS).
... dynamic headspace concentration which follows principles of ASTM E1413-00 ...further analysis. The dynamic headspace method is a destructive form of ...passive headspace concentration with ...
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Fresh, dried or smoked? repellent properties of volatiles emitted from ethnomedicinal plant leaves against malaria and yellow fever vectors in Ethiopia
... Following the putative identification of antennal active compounds in fresh leaf extracts using GC-EAD and GC- MS, one compound shared by those extracts was found to be behaviourally repellent, ß-ocimene, and was used ...
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A(maize)ing attraction: gravid Anopheles arabiensis are attracted and oviposit in response to maize pollen odours
... detection analysis, together with subtractive behavioural assays, to identify a synthetic odour blend that elicits the full oviposition behavioural repertoire of gravid ...
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Analysis of the volatile organic compounds from leaves, flower spikes, and nectar of Australian grown Agastache rugosa
... of headspace solid- phase microextraction (SPME) analysis in combination with gas chromatography–mass spectrometry to identify volatile compounds given off by inflorescences and leaves compared with ...
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