scholarly journals Isolation and characterization of new fumonisins from Fusarium moniliforme NRRL 13616 and development of new analytical techniques.

1999 ◽  
Author(s):  
Sabrena MacKenzie
Keyword(s):  
Fusarium Moniliforme ◽  
Analytical Techniques ◽  
Isolation And Characterization

scholarly journals Isolation and Characterization of Fusarium moniliforme var. subglutinans from Malformed Mango

1999 ◽  
Vol 4 (2) ◽  
pp. 19
Author(s):  
K.P. Akhtar ◽  
M. Asif ◽  
M.A. Khan ◽  
M.J. Jaskani ◽  
I.A. Khan
Keyword(s):  
Fusarium Moniliforme ◽  
Culture Media ◽  
Isolation And Characterization ◽  
Ph Conditions ◽  
Fungal Association ◽  
Mango Malformation ◽  
Growth Characters ◽  
Better Than

Mango malformation occurs in most mango growing regions of the world. Floral and vegetative malformation have been reported. There is general agreement that the fungal pathogen Fusarium moniliforme var. subglutinans or Fusarium subglutinans is the causal agent. Healthy and malformed samples of both floral and vegetative tissues were collected from different varieties of mango grown in several locations to verify the association of F.moniliforme with mango malformation disease in Pakistan. The fungus was isolated and cultured. Frequency of fungal association with the disease ranged between 90- 94%, There was less recovery of fungus from asymptomatic tissue (12- 15%). There was no difference among the commercial mango varieties in the level of susceptibility to this disease. However, seedling germplasm and land races showing resistance to mango malformation were identified. The in vitro growth characters of the fungus were determined on different culture media, at varying temperatures, light and pH conditions. Mycelial growth on potato dextrose agar was better than nine other media tested. At pH 7.00, the ideal temperature for growth was between 25-30° C. Normally, the malformation is not controlled by fungicide application. The in vitro sensitivity of fungus to six fungicides at three concentrations was determined to seek potential means of chemical control.

Regulation of Body Fluid Volume: The Atrial Natriuretic Factor

Physiology ◽  
1986 ◽  
Vol 1 (1) ◽  
pp. 3-5
Author(s):  
J Genest ◽  
C Marc
Keyword(s):  
Atrial Natriuretic Factor ◽  
Body Fluid ◽  
Analytical Techniques ◽  
Fluid Volume ◽  
Isolation And Characterization ◽  
Natriuretic Factor ◽  
Body Fluid Volume ◽  
Made In ◽  
Atrial Natriuretic

The discovery of the atrial natriuretic factor is a major breakthrough for our understanding of the regulation of body fluid volume. It plays a major role in vasorelaxation and in hypertensive and edematous states. The progress made in the last two years is a testimony to the powers of the new analytical techniques for isolation and characterization of peptides.

scholarly journals Isolation and Characterization of Chitin Nanofibers from Calocybe indica and its Applications

2021 ◽  
Vol 11 (4) ◽  
pp. 4105-4113
Keyword(s):  
Antioxidant Activity ◽  
Hydroxyl Radical ◽  
Reduced Glutathione ◽  
Analytical Techniques ◽  
Scavenging Activity ◽  
Isolation And Characterization ◽  
Chemically Treated ◽  
Calocybe Indica ◽  
Chitin Nanofibers

In this study, chitin nanofibers are isolated from Calocybe indica (Milky White Mushroom), and they are further characterized using various analytical techniques such as UV-VIS, FTIR, TGA, Fe - SEM, and XRD. Antioxidant activity of the chitin nanofibers was studied by performing various assays such as DPPH, ABTS, H2O5 Scavenging Activity, Hydroxyl Radical Activity, Superoxide Assay, and Reduced Glutathione Activity. Isolated Chitin nanofibers were then chemically treated to form hydrogels. The hydrogels formed were further characterized.

scholarly journals The isolation and characterization of phytoalexin and constitutive agents from plants for mycotoxin control

2000 ◽  
Author(s):  
◽  
Viresh Mohanlall
Keyword(s):  
South Africa ◽  
Aspergillus Flavus ◽  
Citrus Sinensis ◽  
Fusarium Moniliforme ◽  
Test Organism ◽  
Commercial Activity ◽  
Plant Medicine ◽  
Isolation And Characterization ◽  
Lippia Javanica

Plant medicine is an important area of commercial activity in South Africa. This is a rapidly expanding market, thus we are evaluating natural and stressinduced compounds (phytoalexins) from plants as agents that may be able to control mycotoxins. Natural compounds from Bridelia micrantha, Warburgia salutaris, Lippia javanica and Scenecio serratuloides and stress-induced compounds (phytoalexins) from Citrus sinensis cv Valencia were screened for antitunqal and antimycotoxic activity by bioautography against a test organism (Cladosporium cladosporoides) and mycotoxin producing fungi (Fusarium moniliforme and Aspergillus flavus).

scholarly journals Extraction, Isolation and Characterization of Phytoconstituents in Urginea wightii

2020 ◽  
pp. 1-11
Author(s):  
M. Smitha Raj ◽  
M. N. Shiva Kameshwari
Keyword(s):  
Chemical Constituents ◽  
Acid Methyl Ester ◽  
Analytical Techniques ◽  
Molecular Structures ◽  
Chemical Components ◽  
Analytical Technique ◽  
Isolation And Characterization ◽  
Screening Study ◽  
Interesting Compound

The Urginea wightii is a well-established squill. The therapeutic activity is determined by the presence of pharmacological component present in the crude extract of Urginea wightii. To screen these active herbal components in a single plant material it requires a sophisticated, sensitive and a reliable analytical technique. As a preliminary screening study infrared spectrum provided information related to active functional groups of bulbous extract. This encouraging result evoked us for further accurate detailing of chemical components by advanced analytical techniques like liquid chromatography mass spectroscopy (LC-MS) and Nuclear magnetic resonance (NMR). The identified chemical constituents with possible molecular structures of pharmacological activity by LC-MS was found to be stigmasterol, hexadecanoic acid methyl ester and 1,3,7,11,15-tetramethyl-2- hexadecenol. Similarly, when 1H NMR was performed an interesting molecule (2,3-dihydro-dihydroxy-6-methyl-4H-pyran-4-one) having potential capability in destroying free radicals (antioxidant) was obtained. The comprehensive and qualitative characterization of these bioactive compounds present in Urginea wightii can be a useful in treating vast disease conditions. This investigation paves the way to explore researchers for further use of Urginea wightii as sources of medicinally interesting compound.

scholarly journals Isolation and characterization of two new fusaric acid analogs from Fusarium moniliforme NRRL 13,163.

1985 ◽  
Vol 50 (2) ◽  
pp. 311-314 ◽  
Author(s):  
H R Burmeister ◽  
M D Grove ◽  
R E Peterson ◽  
D Weisleder ◽  
R D Plattner
Keyword(s):  
Fusarium Moniliforme ◽  
Fusaric Acid ◽  
Isolation And Characterization

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

Some applications of electron beam microanalysis techniques in VLSI process evaluation

1983 ◽  
Vol 41 ◽  
pp. 160-161
Author(s):  
Simon Thomas
Keyword(s):  
Integrated Circuits ◽  
Process Evaluation ◽  
Large Scale ◽  
Technology Development ◽  
Analytical Techniques ◽  
Successful Implementation ◽  
Analysis Of Failures ◽  
Characterization Of Materials ◽  
Circuits Vlsi

Trends in the technology development of very large scale integrated circuits (VLSI) have been in the direction of higher density of components with smaller dimensions. The scaling down of device dimensions has been not only laterally but also in depth. Such efforts in miniaturization bring with them new developments in materials and processing. Successful implementation of these efforts is, to a large extent, dependent on the proper understanding of the material properties, process technologies and reliability issues, through adequate analytical studies. The analytical instrumentation technology has, fortunately, kept pace with the basic requirements of devices with lateral dimensions in the micron/ submicron range and depths of the order of nonometers. Often, newer analytical techniques have emerged or the more conventional techniques have been adapted to meet the more stringent requirements. As such, a variety of analytical techniques are available today to aid an analyst in the efforts of VLSI process evaluation. Generally such analytical efforts are divided into the characterization of materials, evaluation of processing steps and the analysis of failures.

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