Analysis of sugars in dwarf mistletoe nectar

1974 ◽  
Vol 52 (12) ◽  
pp. 2533-2538 ◽  
Author(s):  
J. W. Brewer ◽  
K. J. Collyard ◽  
C. E. Lott Jr.
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Sugar Content ◽  
Gas Liquid Chromatography ◽  
Dwarf Mistletoe ◽  
Total Solids ◽  
High Sugar ◽  
Insect Pollinator ◽  
High Sugar Content

Nectar produced by pistillate flowers of the dwarf mistletoe Arceuthobium abietinum Engelm. was analyzed by thin-layer and gas–liquid chromatography. The inconspicuous (0.5–1.5 mm) flowers produce relatively large (0.24 μliter) droplets of highly concentrated nectar (58–92% total solids, expressed as sugars). The major components were glucose (48%), fructose (39%), and sucrose (11%). Traces of other sugars were also present. It is suggested that nectar of this high sugar content is probably a strong insect pollinator attractant, and this, in turn, may be a major factor in the successful spread of the parasitic dwarf mistletoes.

Productivity of binary herbage based on non-traditional forage crops in the Upper Volga region

2021 ◽  
Author(s):  
N. V. Shmeleva ◽  
Keyword(s):  
Species Composition ◽  
Sugar Content ◽  
Field Studies ◽  
Volga Region ◽  
Forage Crops ◽  
High Sugar ◽  
Upper Volga ◽  
High Sugar Content ◽  
The Upper Volga Region

The article presents the results of field studies aimed at expanding the species composition of herbs and the search for adaptive cereals with a high sugar content in the Upper Volga region in 2015-2020.

ANALYSIS OF CHLORORGANIC COMPOUNDS IN FODDER FOR BROILERCHICKENS BY THE METHOD OF GAS-LIQUID CHROMATOGRAPHY WITH MASSSPECTROMETER DETECTOR

2020 ◽  
Vol 1 (2) ◽  
pp. 205-208
Author(s):  
A.A. Parshutina ◽  
◽  
A.A. Solovyova ◽  
L.P. Satyukova ◽  
E.G. Shubina ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Organochlorine Pesticides ◽  
Mass Spectrometer ◽  
Broiler Chickens ◽  
Gas Liquid Chromatography ◽  
Layer Chromatography

The article shows the importance of the study of feed for broiler chickens on the content of organochlorine pesticides. These substances in significant concentrations can disrupt the development of birds and cause mass poisoning. The study of formula feed for broiler chickens «prestart» and «start» by two methodswas conducted: a certified method for the determination of organochlorine pesticides in feed and formula feed (thin layer chromatography) and a method for detecting pesticides not certified for feed (gas-liquid chromatography with mass spectrometer detector). During the experiment, the presence of organochlorine pesticides in several formulafeed samples was revealed.

Additional Cleanup of Samples on GLC Column for TLC Determination of Pesticide Residues

1967 ◽  
Vol 50 (3) ◽  
pp. 615-623
Author(s):  
Kenneth T Hartman
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Pesticide Residues ◽  
Gas Liquid Chromatography ◽  
Rf Values ◽  
Layer Chromatography

Abstract Gas-liquid chromatography (GLC) following conventional isolation procedures has been used to clean up pesticide residues for confirmation by thin layer chromatography (TLC). This procedure is more rapid and efficient than present cleanup procedures and permits the determination of pesticide residues that do not survive these rigorous acid or alkali treatments. The method also permits TLC confirmation of pesticide residues that have similar Rf values but different GLC retention times. Recoveries ranged from 85 to 105% for 25 of 28 pesticides tested

scholarly journals Evidence for high sugar content of baby foods in South Africa

2019 ◽  
Vol 109 (5) ◽  
pp. 328 ◽  
Author(s):  
N C Marais ◽  
N J Christofides ◽  
A Erzse ◽  
K J Hofman
Keyword(s):  
South Africa ◽  
Sugar Content ◽  
Baby Foods ◽  
High Sugar ◽  
High Sugar Content

Gaptan and Structurally Related Compounds: Thin Layer and Gas-Liquid Chromatography

1968 ◽  
Vol 51 (5) ◽  
pp. 1058-1062 ◽  
Author(s):  
Irwin H Pomerantz ◽  
Ronald Ross
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Potassium Permanganate ◽  
Silica Gel ◽  
Chromic Acid ◽  
Gas Liquid Chromatography ◽  
Response Data ◽  
Color Development ◽  
Lower Limits ◽  
Related Compounds

Abstract Captan, folpet, and Difolatan® are structurally related fungicides. Major metabolites derived from these compounds are the imides: tetrahydrophthalimide and phthalimide. The epoxides of captan and Difolatan are possible alteration products which may form under conditions of weathering or degradative metabolism. A TLC method has been developed which differentiates between captan, folpet, Difolatan, tetrahydrophthalimide, phthalimide, captan epoxide, Difolatan epoxide, and tetrahydrophthalimide epoxide. The method is based upon chromatography on silica gel with 1% methanol in chloroform as solvent for development, followed by sequential color development of the resulting spots. N,NDimethyl - p - phenylenediamine, potassium permanganate, and chromic acid were the chromogenic sprays used. Lower limits of detection for these compounds were determined in the named TLC system. The GLC behavior of this group of compounds was also studied, utilizing both a 10% DC-200 on Gas Chrom Q (80—100 mesh) column and a mixed column of 10% DC-200:15% QF-1 (1:1) each on 100-120 mesh Gas Chrom Q. GLC retention times and response data were determined with an electron capture detector

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