ENZYMES OF MARINE ALGAE: II. ISOLATION AND IDENTIFICATION OF 3-HYDROXYTYRAMINE AS THE PHENOLASE SUBSTRATE IN MONOSTROMA FUSCUM

1966 ◽  
Vol 44 (5) ◽  
pp. 605-608 ◽  
Author(s):  
R. D. Tocher ◽  
J. S. Craigie
Keyword(s):  
Green Alga ◽  
Marine Algae ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Natural Substrate ◽  
Fresh Weight ◽  
Isolation And Identification ◽  
Physical And Chemical ◽  
First Time ◽  
And Chemical Properties

3-Hydroxytyramine (dopamine; 3, 4-dihydroxyphenylethylamine) is reported for the first time as an algal constituent. It was isolated and crystallized in approximately 0.3% of the fresh weight of the green alga, Monostroma fuscum. The identity was established by the comparison of its physical and chemical properties with those of an authentic specimen. 3-Hydroxytyramine is the principal phenol and the natural substrate for phenolase in this organism.

Sila-Pharmaka, 9. Mitt. [1] Darstellung und Eigenschaften potentiell curarewirksamer Silicium-Verbindungen, I / Sila-Drugs, 9th Communication [1] Preparation and Properties of Silicon Compounds with Potential Curare-Like Activity, I

1978 ◽  
Vol 33 (4) ◽  
pp. 412-416 ◽  
Author(s):  
Reinhold Tacke ◽  
Roland Niedner
Keyword(s):  
Mass Spectroscopy ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Organosilicon Compounds ◽  
Silicon Compounds ◽  
H Nmr ◽  
Toxicological Data ◽  
Physical And Chemical ◽  
First Time ◽  
And Chemical Properties

Abstract Organosilicon compounds 8, 9 and 10 with potential curare-like action and their precursors 5, 6 and 7 were synthesized for the first time. 5−10 were characterized by their physical and chemical properties, and their structures were confirmed by analyses, 1 H NMR and mass spectroscopy (only for 5−7). The pharmacological and toxicological data of 8, 9 and 10 are reported.

scholarly journals Efecto de la aplicación de bioabono en el rendimiento de cultivos de Vigna

2016 ◽  
Vol 2 ◽  
pp. 75
Author(s):  
Nelson Roberto Flores Blandón
Keyword(s):  
Anaerobic Digestion ◽  
Chemical Properties ◽  
Inorganic Fertilizer ◽  
Physical And Chemical Properties ◽  
Fresh Weight ◽  
Good Source ◽  
National School ◽  
Second Year ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic materials as a soil amendment may be chellply prod used in farmer' s fields via anaerobic digestion of beef manure. From the anaerobic digestion, one obtains gas and manure, the latter having excellent physical and chemical properties which makes it a good source of organic matter. The objectives of this work were to evaluate the effects of beef manure applications on Vigna (Vigna unguiculata) yields Experiments were conducted for two years at the National School of Agriculture, El Salvador, 460 meters aoove sea level, 1800 mm annual precipitation,and a mean temperature of 23.8°C. The soil in this study was an alluvial saody loam Regosol.A total of five treatments were evaluated that included three rates of applied beef manure (40,80, 120 m3/ha), an inorganic fertilizer check (0.39 aud 0.20 kg/20 m2 of ammonium sulfate and urea respectively) and an absolute check (no N applied). The beef manure was applied to the soil eightdays before planting. The urea fraction of the inorganic fertilizer check was banded 8 days after planting. Fresh weight yields were statistically similar between manure and the inorganic fertilizer check in the tirst year, however, a slight tendency for higher yields was observed for the second year. This suggests that applications of manure can improve Vigna fresh weight yields over time.

scholarly journals STUDY OF COMPOSITION, PHYSICAL AND CHEMICAL PROPERTIES AND BIOLOGICAL ACTIVITY OF POLYSACCHARIDE COMPLEX OF ARCTIUM LAPPA LEAVES

2017 ◽  
Vol 25 (1) ◽  
pp. 42-48
Author(s):  
I A. Sychev ◽  
D G. Kokina
Keyword(s):  
Chemical Properties ◽  
Erythrocyte Membranes ◽  
Physical And Chemical Properties ◽  
Qualitative Composition ◽  
Arctium Lappa ◽  
Polysaccharide Complex ◽  
Healthy Donors ◽  
Physical And Chemical ◽  
First Time ◽  
And Chemical Properties

A method of isolation of polysaccharide complex from the leaves of Burdock (Arctium lappa L.) is described in the article. For the first time the qualitative composition of this complex was determined, belonging to the group of heteroglycans. Some of physical and chemical properties of polysaccharide complex were studied. It is shown that polysaccharide complex increases catalase activity and peroxide resistance of the erythrocyte membranes of healthy donors. The study found that polysaccharide complex of Burdock improves physical performance of test animals.

THE BLOOM AND TOXICITY OF CYANOBACTERIA IN LAKE SEVAN

2020 ◽  
Vol 54 (2 (252)) ◽  
pp. 168-176
Author(s):  
L.R. Hambaryan ◽  
L.G. Stepanyan ◽  
M.V. Mikaelyan ◽  
Q.G. Gyurjyan
Keyword(s):  
Algal Blooms ◽  
Littoral Zone ◽  
Algal Bloom ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Lake Sevan ◽  
Phosphate Ions ◽  
Physical And Chemical ◽  
First Time ◽  
And Chemical Properties

Seasonal hydrochemical, hydrophysical, and phytoplankton studies were conducted in a littoral zone of Lake Sevan in 2019. It is known that in recent years widespread algal blooms were usually started from the littoral zone of Big Sevan, and then spread towards the pelagic zone of the lake. The bloom was mainly caused by species belonging to the genus Dolichospermum (previously Anabaena). Our study has revealed that the physical and chemical properties of water were changed as a result of algal bloom. Particularly, the transparency of water and concentration of dissolved oxygen decreased, while the concentrations of ammonium, nitrite and phosphate ions increased. For the first time, the presence of the toxins microcystin and anatoxin-a was recorded in the lake.

Isolation and identification of the high molecular weight saturated fatty acids of butterfat

1959 ◽  
Vol 26 (2) ◽  
pp. 190-195 ◽  
Author(s):  
R. P. Hansen ◽  
F. B. Shorland ◽  
N. June Cooke
Keyword(s):  
Molecular Weight ◽  
Saturated Fatty Acids ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Octadecanoic Acid ◽  
Isolation And Identification ◽  
Docosanoic Acid ◽  
Physical And Chemical ◽  
Tetracosanoic Acid ◽  
And Chemical Properties

Butterfat has been shown to contain the normal odd-numbered saturated acids n-nonadecanoic acid (C19), n-heneicosanoic acid (C21), and n-tricosanoic acids (C23).The presence of the normal even-numbered acids n-octadecanoic acid (C18), n-docosanoic acid (C22), n-tetracosanoic acid (C24) and n-hexacosanoic acid (C26) is conclusively established.n-Eicosanoic acid (C20) formerly assumed to be present in butterfat has been isolated and identified by its physical and chemical properties.

NEW CONSIDERATIONS IN ORGANOGERMANIUM-SULPHUR CHEMISTRY

1963 ◽  
Vol 41 (5) ◽  
pp. 1276-1280 ◽  
Author(s):  
Malcolm C. Henry ◽  
Wenzel E. Davidson
Keyword(s):  
Chemical Properties ◽  
Group Iv ◽  
Physical And Chemical Properties ◽  
Sulphur Compounds ◽  
New Compounds ◽  
Physical And Chemical ◽  
First Time ◽  
And Chemical Properties

The successful synthesis of sodium triphenylgermanethiol (1), (C6H5)3GeSNa, and disodium diphenylgermanedithiol, (C6H5)2Ge(SNa)2, have made it possible to carry out reactions with RX type compounds yielding a variety of organogermanium-sulphur compounds. In addition, triphenylgermanethiol, (C6H5)3GeSH, has been synthesized for the first time. Reactions of these compounds are related to analogous group IV element compounds. Physical and chemical properties of these new compounds are also discussed.

scholarly journals Anatomical characterization, physical, and chemical properties of wood of Quercus macdougallii Martínez, endemic species of the Sierra Juárez of Oaxaca, Mexico

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5975-5998
Author(s):  
Faustino Ruiz-Aquino ◽  
Lizbeth Luna-Bautista ◽  
Aremi E. Luna-Bautista ◽  
Wenceslao Santiago-García ◽  
Luis F. Pintor-Ibarra ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Physical Properties ◽  
Endemic Species ◽  
Basic Density ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Cellulose Pulp ◽  
Physical And Chemical ◽  
First Time ◽  
And Chemical Properties

The anatomical characteristics and the physical and chemical properties of wood of Quercus macdougallii Martínez are presented for the first time. Q. macdougallii Martínez is an endemic species of the Sierra Juarez of Oaxaca. The microscopic characteristics were described in preparations of typical cuts and dissociated material. The physical properties were evaluated according to the ASTM D 143-94 standard in sapwood and heartwood specimens. The measurable elements and physical properties were classified according to the mean. With the measurable elements, the paper pulp quality index was determined. In sapwood and heartwood, the basic chemical composition was determined. The wood of Q. macdougallii presented a pronounced grain, a thick texture, and a straight thread. Fibers, fibrotracheids, uniseriate, multiseriate, and aggregate rays were found. Basic density 0.55 g cm-3 in sapwood and 0.61 g cm-3 in heartwood is classified as moderately heavy and heavy, respectively. The saturation point of the fiber is classified as high. Based on its physical properties, Q. macdougallii wood can be used in the manufacture of furniture, veneer, floors, tool handles, and construction. Based on the pulp quality indices and chemical composition, this wood could be used to obtain cellulose pulp for paper.

scholarly journals THE ISOLATION AND IDENTIFICATION OF PARA-AMINOBENZOIC ACID PRODUCED BY STAPHYLOCOCCI RESISTANT TO SULFONAMIDE

1952 ◽  
Vol 95 (3) ◽  
pp. 247-258 ◽  
Author(s):  
Sidney Leskowitz ◽  
Charles L. Fox ◽  
Samuel Raymond
Keyword(s):  
Staphylococcus Aureus ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Aminobenzoic Acid ◽  
Isolation And Identification ◽  
Positive Identification ◽  
Ether Extraction ◽  
Unequivocal Identification ◽  
Physical And Chemical ◽  
And Chemical Properties

Previous studies have shown that when Staphylococcus aureus becomes resistant to sulfonamides, an antisulfonamide substance is produced in the growth medium. Although these studies suggested that the substance was p-aminobenzoic acid (PABA), isolation and positive identification were not achieved. Because of the importance of these observations, unequivocal identification of the product was attempted. A strain of Stapkylococcus aureus resistant to sulfonamides was cultivated on a simplified medium, the organisms separated in a Sharples centrifuge and the diazotisable amine absorbed on amberlite IR-120 previously acidified. Elution was accomplished with pyridine and the amine recovered by ether extraction at pH 3.7. Paper chromatography revealed one amine resembling PABA and another contaminating diazotizable amine present in very small amounts. The PABA-like amine was further separated by chromatography; its Rf value and its spectrum in the ultraviolet then equalled those obtained with PABA. A 2,4-dlnltrophenyl derivative of the amine was prepared and the m.p. was similar to that of the derivative made from PABA. On the basis of the physical and chemical properties described, it would appear unequivocal that this bacterial amine is PABA.

Sila-Pharmaka, 16. Mitt. [1]. Sila-Analoga von Nifedipin-ähnlichen 4-Aryl-2.6-dimethyl-1.4-dihydropyridin-3.5-dicarbonsäure-dialkylestern, I. / Sila-Drugs, 16th Communication [1]. Sila-Analogues of Nifedipine-Like Dialkyl 4-Aryl-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylates, I.

1980 ◽  
Vol 35 (4) ◽  
pp. 494-501 ◽  
Author(s):  
R. Tacke ◽  
A. Bentlage ◽  
R. Towart ◽  
H. Meyer ◽  
F. Bossert ◽  
...  
Keyword(s):  
Mass Spectroscopy ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
H Nmr ◽  
Physical And Chemical ◽  
Antihypertensive Properties ◽  
First Time ◽  
And Chemical Properties

The nifedipine-like 1,4-dihydropyridines 10a and 11a as well as their sila-analogues 10b, 10c, and 11b were synthesized for the first time. 10a, 10b, 10c, 11 a , 11b , and their precursors 8a, 8b, 9a, and 9b were characterized by their physical and chemical properties, and their structures confirmed by analyses, 1H NMR and mass spectroscopy. The antispasmodic, vasodilating, and antihypertensive properties of 10a, 10b, 10c, 11a, and 11b were compared.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

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