A simple and efficient cryogenic trapping device for odor evaluation of aroma fractions

1987 ◽  
Vol 10 (6) ◽  
pp. 369-370 ◽  
Author(s):  
S. T. Adam
Keyword(s):  
Odor Evaluation ◽  
Cryogenic Trapping ◽  
Trapping Device

A multi-location peak parking approach for calculation of second dimensional retention indices for improved volatile compound identification with cryogen-free comprehensive heart-cut two-dimensional gas chromatography

2021 ◽  
Vol 13 (1) ◽  
pp. 124-132
Author(s):  
Pannipa Janta ◽  
Duangkamol Pinyo ◽  
Yamonporn Yodta ◽  
Porames Vasasiri ◽  
Meinolf Weidenbach ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Volatile Compound ◽  
Retention Indices ◽  
Two Dimensional ◽  
Compound Identification ◽  
Multidimensional Gas Chromatography ◽  
Cryogenic Trapping ◽  
Trapping Device ◽  
Peak Parking

Comprehensive heart-cut multidimensional gas chromatography (CH/C MDGC) without a cryogenic trapping device was developed with an approach for calculation of first and second dimensional retention indices (1I and 2I).

Flavor Profile Analysis and GC/MS Detection of Phenolic Iodinated Disenfection Byproducts in Drinking Water for the USA Space Program

1999 ◽  
Vol 40 (6) ◽  
pp. 45-51 ◽  
Author(s):  
Andrea M. Dietrich ◽  
Susan Mirlohi ◽  
Willian F. DaCosta ◽  
Jennifer Peters Dodd ◽  
Richard Sauer ◽  
...  
Keyword(s):  
Drinking Water ◽  
Potable Water ◽  
Profile Analysis ◽  
Major Product ◽  
Space Program ◽  
Odor Threshold ◽  
Odor Evaluation ◽  
The Usa ◽  
Flavor Profile Analysis ◽  
Flavor Profile

Reactions of iodine and phenol were investigated to determine which iodophenols were produced and their odor properties. The research was performed in support of the USA space program that applies iodine to disinfect potable water for spacecraft use. Higher concentrations (50 mg/l) and higher iodine:phenol (e.g. 10:1) ratios resulted in the formation of greater iodophenol concentrations and higher substituted iodophenols. The reactions were fast and nearly complete within 1 hour. For pH 5.5 and 8 and all iodine:phenol ratios, formation of monosubstituted compounds indicated that 2-iodophenol was favored over 4-iodophenol. At the intermediate iodine:phenol ratios of 1:1 and 2:1, substantial amounts of the diiophenols formed and persisted for up to 32 days. The diiodophenols were not detected at iodine:phenol ratios of 0.2:1 and 10:1. The compound 2,4,6-triiodophenol was the major product formed at a 10:1 iodine:phenol ratio and the formation of this trisubstituted phenol appeared nearly complete. Odor evaluation indicated that the iodophenols have much lower odor threshold concentrations (OTC) than phenol. The 2- and 4- iodophenol had OTC values of ≅ 1 and 500 μg/l, respectively, with odors described as “medicinal, phenol, chemical”.

Supplemental tests of gas trapping device for N 2 flux measurement

2016 ◽  
Vol 93 ◽  
pp. 9-12 ◽  
Author(s):  
Xinhong Liu ◽  
Yan Gao ◽  
Yongqiang Zhao ◽  
Yan Wang ◽  
Neng Yi ◽  
...  
Keyword(s):  
Flux Measurement ◽  
Gas Trapping ◽  
Trapping Device

Studies on analogs of DAMASCENOLIDETM: Part 4. Synthesis and odor evaluation of sulfur-containing analogs of DAMASCENOLIDETM

2021 ◽  
Author(s):  
Yamato Miyazawa ◽  
Kenji Kawaguchi ◽  
Ryo Katsuta ◽  
Tomoo Nukada ◽  
Ken Ishigami
Keyword(s):  
Sulfur Atom ◽  
Development Project ◽  
Aroma Compounds ◽  
Odor Intensity ◽  
Aroma Compound ◽  
Odor Evaluation ◽  
Damask Rose ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds

ABSTRACT DAMASCENOLIDETM [1, 4-(4-methylpent-3-en-1-yl)furan-2(5H)-one], which is isolated from damask rose, is a useful aroma compound with a citrus-like odor. We have previously reported on the synthesis and odor properties of 34 analogs of 1 as part of our new aroma compound development project. In order to develop better aroma compounds and to gather more information on structure-odor relationships, six novel sulfur-containing analogs of 1 were synthesized. Odor evaluation revealed that their odors differed significantly from those of the corresponding sulfur-free compounds. The introduction of a sulfur atom does not necessarily result in a sulfur-like odor. In particular, the 2(5H)-thiophenone analogs gave waxy, oily and lactone-like odors that are uncharacteristic of sulfur-containing compounds. In many synthesized analogs, the introduction of a sulfur atom led to an increase in odor intensity, as expected.

Development and implementation of device for capturing large mechanical particles falling into the space between cylinder and plunger of sucker-rod pump

2020 ◽  
pp. 43-45
Author(s):  
L.G. Hajikerimova ◽  
◽  
◽  
Keyword(s):  
Oil Wells ◽  
Deep Well ◽  
Pressure Decrease ◽  
Sucker Rod ◽  
Large Particles ◽  
Sucker Rod Pump ◽  
Trapping Device

The deep pump, mainly sucker-rod deep pumping method is widely applied in the onshore oil wells of Azerbaijan. Despite the fact that the deep-well sucker rod pumping method is widespread, its operation in sand-producing wells is accompanied by various complications. Since mechanical particles wearing the pump parts out, falling into the space between the plunger and the cylinder, either wedge the plunger inside the cylinder or increase the gap between them. To prevent the ingress of large particles of sand into the gap between the plunger and the cylinder of the deep sucker rod pump, a device for sand trapping has been developed. The sand-trapping device is installed within the well tubing strings on the rod string and prevents the big particles of the liquid in the pipes falling into the gap between the plunger and cylinder. As the plunger, the device is started via balanced head. Due to the equipment installation, the liquid injected from the pump undergoes pressure decrease and the conditions for deposition and accumulation of large particles are formed.

An Odor Evaluation Apparatus for Field and Laboratory Use

AIHAJ ◽  
1958 ◽  
Vol 19 (1) ◽  
pp. 1-7 ◽  
Author(s):  
John S. Nader
Keyword(s):  
Odor Evaluation

Cryogenic trapping for speciation analysis

2003 ◽  
pp. 495-531 ◽  
Author(s):  
M.P Pavageau ◽  
E Krupp ◽  
A de Diego ◽  
C Pécheyran ◽  
O.F.X Donard
Keyword(s):  
Speciation Analysis ◽  
Cryogenic Trapping

Impairment of cross-modality of vision and olfaction in Parkinson disease

Neurology ◽  
2018 ◽  
Vol 90 (11) ◽  
pp. e977-e984 ◽  
Author(s):  
Motoyasu Honma ◽  
Yuri Masaoka ◽  
Takeshi Kuroda ◽  
Akinori Futamura ◽  
Azusa Shiromaru ◽  
...  
Keyword(s):  
Parkinson Disease ◽  
Cognitive Functions ◽  
Visual Information ◽  
Visual Cues ◽  
Visual Effects ◽  
Behavioral Experiments ◽  
Odor Evaluation ◽  
Patient Performance ◽  
Normal Controls

ObjectiveTo determine whether Parkinson disease (PD) affects cross-modal function of vision and olfaction because it is known that PD impairs various cognitive functions, including olfaction.MethodsWe conducted behavioral experiments to identify the influence of PD on cross-modal function by contrasting patient performance with age-matched normal controls (NCs). We showed visual effects on the strength and preference of odor by manipulating semantic connections between picture/odorant pairs. In addition, we used brain imaging to identify the role of striatal presynaptic dopamine transporter (DaT) deficits.ResultsWe found that odor evaluation in participants with PD was unaffected by visual information, while NCs overestimated smell when sniffing odorless liquid while viewing pleasant/unpleasant visual cues. Furthermore, DaT deficit in striatum, for the posterior putamen in particular, correlated to few visual effects in participants with PD.ConclusionsThese findings suggest that PD impairs cross-modal function of vision/olfaction as a result of posterior putamen deficit. This cross-modal dysfunction may serve as the basis of a novel precursor assessment of PD.

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