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Showing 13 to 24 of 598 entries
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Degradative actions of microbial xylanolytic activities on hemicelluloses from rhizome of Arundo donax.

AMB Express

Lama L, Tramice A, Finore I, Anzelmo G, Calandrelli V, Pagnotta E, Tommonaro G, Poli A, Di Donato P, Nicolaus B, Fagnano M, Mori M, Impagliazzo A, Trincone A.
PMID: 25024928
AMB Express. 2014 Jul 09;4:55. doi: 10.1186/s13568-014-0055-6. eCollection 2014.

Polysaccharidases from extremophiles are remarkable for specific action, resistance to different reaction conditions and other biotechnologically interesting features. In this article the action of crude extracts of thermophilic microorganisms (Thermotoga neapolitana, Geobacillus thermantarcticus and Thermoanaerobacterium thermostercoris) is studied using...

A Biomimetic Approach to the Discorhabdin Alkaloids: Total Syntheses of Discorhabdins C and E and Dethiadiscorhabdin D.

The Journal of organic chemistry

Aubart KM, Heathcock CH.
PMID: 11674079
J Org Chem. 1999 Jan 08;64(1):16-22. doi: 10.1021/jo9815397.

The characteristic spirodienone structure of the discorhabdin alkaloids is readily formed by reaction of the tyramine-substituted indoloquinonimines 26, 35, and 36 with cupric chloride, triethylamine, and oxygen. This cyclization provides a possibly biomimetic route to discorhabdins C and E...

Biochemical Basis of Resistance of Tobacco Callus Tissue Cultures to Hydroxyphenylethylamines.

Plant physiology

Negrel J, Javelle F, Paynot M.
PMID: 12231940
Plant Physiol. 1993 Oct;103(2):329-334. doi: 10.1104/pp.103.2.329.

It has been reported that hydroxyphenylethylamines, such as tyramine and octopamine, are toxic to tobacco (Nicotiana tabacum L.) callus cultures grown in the presence of auxins, whereas calli grown in the presence of cytokinins and crown gall cultures are...

Physiological Mechanisms of Pheromonostatic Responses: effects of Adrenergic Agonists and Antagonists on Moth (Helicoverpa armigera) Pheromone Biosynthesis.

Journal of insect physiology

CAO M, YONGLIANG F, GILEADI C, RAFAELI A.
PMID: 12769910
J Insect Physiol. 1997 Mar;43(3):261-269. doi: 10.1016/s0022-1910(96)00088-1.

The adrenergic agonists octopamine, tyramine and clonidine inhibited the normal pheromonotropic action due to PBAN (pheromone biosynthesis activating neuropeptide) in incubations of intersegmental tissues that are situated between the 8th and 9th abdominal segments of the moth ovipositor tip....

Pathological changes in platelet histamine oxidases in atopic eczema.

Mediators of inflammation

Kiehl R, Ionescu G.
PMID: 18475554
Mediators Inflamm. 1993;2(6):403-6. doi: 10.1155/S0962935193000560.

Increased plasma histamine levels were associated with significantly lowered diamine and type B monoamine oxidase activities in platelet-rich plasma of atopic eczema (AE) patients. The diamine oxidase has almost normal cofactor levels (pyridoxal phosphate and Cu(2+)) but the cofactor...

Gramine Accumulation in Leaves of Barley Grown under High-Temperature Stress.

Plant physiology

Hanson AD, Ditz KM, Singletary GW, Leland TJ.
PMID: 16662926
Plant Physiol. 1983 Apr;71(4):896-904. doi: 10.1104/pp.71.4.896.

The indole alkaloid gramine is toxic to animals and may play a defensive role in plants. Under certain conditions, shoots of barley cultivars such as ;Arimar' and CI 12020 accumulate gramine (N,N-dimethyl-3-aminomethylindole) and lesser amounts of its precursors 3-aminomethylindole...

Membrane electrodes sensitive to doubly charged surfactants. Application to a cationic gemini surfactant.

Talanta

Sirieix-Plénet J, Turmine M, Letellier P.
PMID: 18969132
Talanta. 2003 Jul 27;60(5):1071-8. doi: 10.1016/S0039-9140(03)00192-9.

The response of a membrane electrode is not always identical to that of a redox electrode. Indeed, in the case of membrane electrode the response is not due to a redox equilibrium but to a cross-membrane potential. So, the...

Separation and determination of l-tyrosine and its metabolites by capillary zone electrophoresis with a wall-jet amperometric detection.

Talanta

Huang Y, Jiang X, Wang W, Duan J, Chen G.
PMID: 18970894
Talanta. 2006 Dec 15;70(5):1157-63. doi: 10.1016/j.talanta.2006.03.009. Epub 2006 Jun 14.

A method of capillary electrophoresis with wall-jet amperometric detection (AD) has been developed for separation and determination of l-tyrosine (Tyr) and its metabolites, such as Tyramine (TA), p-hydroxyphenylpyruvic (pHPP), homogentisic acid (HGA) and some dipeptides containing Tyr, such as...

Modification of the wettability of a polymeric substrate by pH effect. Determination of the surface acid dissociation constant by contact angle measurements.

Langmuir : the ACS journal of surfaces and colloids

Badre C, Mayaffre A, Letellier P, Turmine M.
PMID: 16981758
Langmuir. 2006 Sep 26;22(20):8424-30. doi: 10.1021/la061324p.

The wetting properties of a substrate can be changed by chemical reaction. Here, we studied simple materials with acid-base properties, by preparing poly(vinyl chloride) films containing lauric acid. These substrates constitute simple polymeric surfaces the wettability of which can...

Electrochemical nucleation of gold nanoparticles in a polymer film at a liquid-liquid interface.

Langmuir : the ACS journal of surfaces and colloids

Knake R, Fahmi AW, Tofail SA, Clohessy J, Mihov M, Cunnane VJ.
PMID: 15667181
Langmuir. 2005 Feb 01;21(3):1001-8. doi: 10.1021/la048277q.

Simultaneous nucleation of gold nanoparticles and polymerization of tyramine has been carried out at an immiscible electrolyte interface. By transferring the gold ion of tetraoctylammoniumtetracloroaurate (TOAAuCl(4)) from the organic to the aqueous phase, a fast homogeneous electron transfer from...

Polymer-dispersed chiral smectic A with photorefractive properties.

Optics letters

Termine R, Golemme A.
PMID: 18040514
Opt Lett. 2001 Jul 01;26(13):1001-3. doi: 10.1364/ol.26.001001.

We present results on the photorefractive properties of chiral smectic A liquid-crystal phases dispersed in cylindrical cavities in a photoconducting polymer. The refractive-index modulation is due to the electroclinic effect, which is linear in the electric field, in contrast...

Effect of Deuterium Substitution in Sympathomimetic Amines on Adrenergic Responses.

Science (New York, N.Y.)

Belleau B, Burba J, Pindell M, Reiffenstein J.
PMID: 17769335
Science. 1961 Jan 13;133(3446):102-4. doi: 10.1126/science.133.3446.102.

It was discovered that replacement of the alpha-hydrogens of tyramine and tryptamine by deuterium produces a marked intensification of the blood pressure effects and nictitating membrane contraction normally produced by these amines. The results are interpreted on the basis...

Showing 13 to 24 of 598 entries