Influence de la monensine sur la composition des parois de quelques champignons filamenteux

1992 ◽  
Vol 38 (4) ◽  
pp. 277-283 ◽  
Author(s):  
Yahya Koulali ◽  
Jean-Louis Fonvieille ◽  
Jane-Marie Touze-Soulet ◽  
Émile Benizri ◽  
Robert Dargent
Keyword(s):  
Chemical Composition ◽  
Key Words ◽  
Botrytis Cinerea ◽  
Uronic Acid ◽  
Sclerotium Rolfsii ◽  
Total Lipids ◽  
Chemical Content ◽  
Neutral Sugars ◽  
Achlya Bisexualis

Walls of young hyphae of Achlya bisexualis, Botrytis cinerea, and Sclerotium rolfsii growing in the presence or the absence of monensin were isolated and their chemical content was determined. Monensin induced modified proportions of various monomers resulting in a reduction of the (neutral sugars + uronic acid)/amine sugar ratio of B. cinerea and S. rolfsii (species of group chitin–glucans), and of cellulose in A. bisexualis (species of group cellulose-glucans).The walls of hyphae grown in presence of monensin also contained less total lipids and proteins. These modificationsin chemical composition are related to changes in cytological structure. Key words: fungi, monensin, wall.

Influence de la monensine sur la composition lipidique et protéique des culots membranaires chez Botrytis cinerea Pers. et Sclerotium rolfsii Sacc.

1998 ◽  
Vol 44 (10) ◽  
pp. 937-944 ◽  
Author(s):  
Yahya Koulali ◽  
Jean Louis Fonvieille ◽  
Abbes Es-Sgaouri ◽  
Robert Dargent
Keyword(s):  
Botrytis Cinerea ◽  
Sclerotium Rolfsii ◽  
Vesicular Traffic ◽  
Chemical Content

Membranes of young hyphae of Botrytis cinerea and Sclerotium rolfsii in the presence or absence of monensin were isolated and their chemical content was determined. Monensin induced a reduction of protein/lipid and sterol/phospholipid ratios. These modifications show that monensin affects vesicular traffic and also both the normal biosynthesis and growth.Key words: monensin, membranes, Botrytis cinerea, Sclerotium rolfsii.

Chemical composition and antifungal activity of essential oils and their combinations against Botrytis cinerea in strawberries

2021 ◽  
Author(s):  
Josemar Gonçalves de Oliveira Filho ◽  
Guilherme da Cruz Silva ◽  
Aline Cristina de Aguiar ◽  
Lavinia Cipriano ◽  
Henriette Monteiro Cordeiro de Azeredo ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Antifungal Activity ◽  
Essential Oils ◽  
Botrytis Cinerea

Effect of nitrogen fertilization on yield, storage losses and chemical composition of winter cabbage

1991 ◽  
Vol 71 (3) ◽  
pp. 943-946 ◽  
Author(s):  
S. Freyman ◽  
P. M. Toivonen ◽  
W. C. Lin ◽  
P. W. Perrin ◽  
J. W. Hall
Keyword(s):  
Ascorbic Acid ◽  
Chemical Composition ◽  
Key Words ◽  
Nitrogen Fertilization ◽  
N Fertilization ◽  
Nitrogen Rate ◽  
N Application ◽  
Storage Losses ◽  
White Cabbage ◽  
Brassica Oleracea L

Increasing rates of field nitrogen (N) application (0, 100, 200, 300, 400 and 500 kg N ha−1) resulted in markedly higher yields of winter white cabbage (Brassica oleracea L. var. capitata 'Bartolo') due to larger head size. Glucose and fructose contents increased with increased nitrogen. In contrast, ascorbic acid and sucrose contents declined slightly with increased nitrogen. Nitrogen rate had little effect on storage losses. The results indicated that increased N fertilization provided overall benefit to cabbage production. Key words: Cabbage, nitrogen fertilization, storage losses, yield

Chemical composition and antifungal activity of essential oil from origanum vulgare against botrytis cinerea

2021 ◽  
pp. 130506
Author(s):  
Yun Zhao ◽  
Yun-Hai Yang ◽  
Min Ye ◽  
Kai-Bo Wang ◽  
Li-Ming Fan ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Antifungal Activity ◽  
Essential Oil ◽  
Botrytis Cinerea ◽  
Origanum Vulgare

Silyubum marianum, dandelion plants and their benefits

2021 ◽  
Vol 08 (03) ◽  
pp. 16-19
Author(s):  
Gülüstan Nağı qızı Əliyeva ◽  
Keyword(s):  
Chemical Composition ◽  
Key Words ◽  
Scientific Article ◽  
The World ◽  
Therapeutic Properties

The scientific article provides detailed information about silyubum marianum and dandelion. Their chemical composition, therapeutic properties against liver, bile and other diseases, and their use in cosmetology were discussed. The article also discusses the benefits of silymarin in the treatment of cancer and osteoporosis. The components of silyubum marianum and dandelion plants have been announced. Distribution zones of silyubum marianum and dandelion plants in the world and in Azerbaijan have been noted. The rules of use of plants are also reflected in the article. Key words: plant, silyumarin, thorns, liver, seeds, silibinin.Carduelis,carotene

Studies of the Late Bronze Age copper-based ingots found in Greece

2000 ◽  
Vol 95 ◽  
pp. 207-217 ◽  
Author(s):  
Helen Mangou ◽  
Panayiotis V. Ioannou
Keyword(s):  
Chemical Composition ◽  
Bronze Age ◽  
Atomic Absorption Spectroscopy ◽  
Pure Copper ◽  
Late Bronze Age ◽  
Slow Cooling ◽  
Metallographic Examination ◽  
Aegean Region ◽  
Chemical Content ◽  
Different Origin

Seven bun type, one slab type, and 44 oxhide type Late Bronze Age ingots found in the Aegean region, Crete and Mainland Greece have been analysed for their chemical content (twelve elements) by atomic absorption spectroscopy. The results show that the ingots contain variable amounts of oxygen as copper(I) oxide. The oxhide ingots are made of purer copper, the bun type are of relatively pure copper and bronze, while the slab type is bronze. The oxhide ingots from Crete may have a different origin from those found in the Aegean and in Mainland Greece because they have a different chemical composition. The metallographic examination of twenty ingots, three of bun and seventeen of oxhide type, revealed that they have been cast in open moulds, followed by slow cooling. Microanalyses of inclusions in fifteen ingots revealed the presence of copper(I) sulphide, copper(I) oxide, copper-iron and copper-iron-sulphur and their origin is discussed. Hardness measurements on fourteen ingots of various types revealed that they are somewhat harder for a cast object than control alloys and likely explanations are given.

scholarly journals Discrimination of Genealogical Groups of Arabica Coffee by the Chemical Composition of the Beans

2019 ◽  
Vol 11 (16) ◽  
pp. 141
Author(s):  
Larissa O. Fassio ◽  
Marcelo R. Malta ◽  
Gladyston R. Carvalho ◽  
Antônio A. Pereira ◽  
Ackson D. Silva ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Chemical Composition ◽  
Chemical Markers ◽  
Total Lipids ◽  
Germplasm Bank ◽  
Total Sugars ◽  
Coffee Beans ◽  
Different Levels ◽  
Important Marker

This work aimed to characterize and discriminate genealogical groups of coffee as to the chemical composition of the grains through the model created by PLS-DA method. 22 accessions of Coffea arabica, from the Active Germplasm Bank of Minas Gerais, were divided into groups according to the genealogical origin. Samples of ripe fruits were harvested selectively and processed by the wet method, to obtain pulped coffee beans, with 11% (b.u.) of water content. The raw beans were assessed as to the content of polyphenols, total sugars, total lipids, protein, caffeine, sucrose, and fatty acids. The data were submitted the chemometric analysis, PCA and PLS-DA. The results of PLS-DA identified the variables which most influence the classification of genealogical groups and possible chemical markers to accessions processed by the pulped method. The sucrose content was an important marker for the Exotic accession group. However, the content of polyphenols has been identified as a marker for the group Tymor Hybrid, and the caffeine for the bourbon group. The different fatty acids have been identified as markers for all genealogical groups, at different levels. The model PLS-DA is effective in discriminating genealogical groups from the chemical composition of the beans.

CHEMICAL COMPOSITION OF HYPHAL AND SCLEROTIAL WALLS OF SCLEROTIUM ROLFSII SACC.

1967 ◽  
Vol 13 (2) ◽  
pp. 137-141 ◽  
Author(s):  
I. Chet ◽  
Y. Henis ◽  
R. Mitchell
Keyword(s):  
Amino Acids ◽  
Chemical Composition ◽  
Acid Hydrolysis ◽  
Sclerotium Rolfsii ◽  
Ash Content ◽  
Chemical Degradation ◽  
Chemical Components

The chemical components of the sclerotial and hyphal walls of the fungus Sclerotium rolfsii Sacc. are compared. Sclerotial walls contain a melanin-like pigment which is absent from hyphal walls. They are also higher in non-hydro-lyzable residue, in lipids, and in ash content. In both walls, glucose, mannose, and glucosamine are found after acid hydrolysis. Acid hydrolysates of sclerotial and hyphal walls contain 10 and 13 amino acids, respectively, L-arginine, L-serine, and L-proline being absent from sclerotial walls. The possible role of some of these components in the resistance of the sclerotia to biological and chemical degradation is discussed.

CRYOGENIC GREASE LUBRICANTS FOR ROCKET AND SPACE TECHNOLOGY

2021 ◽  
pp. 31-41
Author(s):  
Andrey D. PLOTNIKOV ◽  
Aleksandr V. VODOLAZHSKIY ◽  
Natalya S. YAKUPOVA
Keyword(s):  
Chemical Composition ◽  
Low Temperature ◽  
Key Words ◽  
Ir Spectrum ◽  
Practical Relevance ◽  
Space Technology ◽  
Potential Evaporation ◽  
Testing Methods ◽  
Solidification Temperature ◽  
Temperature Characteristics

The paper represents requirements for cryogenic grease lubricants used in the rocket and space technology. Data on lubricants based on perfluoropolyether liquid FEN is provided. New lubricant testing methods enabling to analyze their chemical composition and low-temperature characteristics are proposed. Quoted are investigation results for the equivalents of previously used cryogenic lubricants NIKA, NIRA and «Ametist». A practical relevance of the paper has been proven by introduction of low-temperature lubricants «Sever» currently being used in rocket and space items, as well аs successful application of the developed lubricant incoming inspection procedures at RSC Energia. Key words: low-temperature lubricant, perfluoropolyether liquid FEN, viscosity, solidification temperature, IR spectrum, potential evaporation.

scholarly journals Chemical composition and control of Sclerotium rolfsii Sacc by essential oils

2020 ◽  
Vol 14 (4) ◽  
pp. 119-128
Author(s):  
Rosa Beserra Santos Ananda ◽  
Laranjeira Delson ◽  
Raquel Carvalho Dias Larisse ◽  
Da Silva Sousa Edymilais ◽  
Dário Silva De Melo Christian ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Sclerotium Rolfsii ◽  
And Control
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