Results 41 to 50 of about 1,054 (157)

Potential of bacteria isolated from chitin‐enriched soil against Euschistus heros (Hemiptera: Pentatomidae)

open access: yesPest Management Science, Volume 82, Issue 4, Page 3552-3561, April 2026.
B. thuringiensis and B. altitudinis, isolated from chitin‐enriched soil, causing mortality in Euchistus heros under laboratory conditions. First report of B. altitudinis in the control of E. heros. Abstract BACKGROUND Biological control using entomopathogenic microorganisms is a more sustainable alternative to chemical pesticides for managing insect ...
Vicente Guilherme Handte   +6 more
wiley   +1 more source

New Aspect of the in Vitro Metabolism of Some Biogenic Amines [PDF]

open access: yes, 1965
Tryptamine, 5-methoxytryptamine, tyramine, histamine, octopamine, dopamine, and noradrenaline were incubated with the »nuclear fraction« of rat liver homogenate. The first four amines were also incubated with rat liver slices.
S. Iskrić, S. Kveder
core   +1 more source

Foliar Application of Nano‐Selenium Enhances Tea Quality and Selenium Biofortification by Promoting Theanine Synthesis and Nitrogen Metabolism

open access: yesPlant Biotechnology Journal, Volume 24, Issue 4, Page 2300-2311, April 2026.
ABSTRACT Selenium (Se) biofortification improves crops' nutritional value, while nano‐selenium (nano‐Se) offers enhanced bioavailability over traditional Se fertilisers. The quality of tea (Camellia sinensis) depends critically on nitrogen (N) metabolism and amino acid balance, particularly of theanine.
Qingxue Guo   +4 more
wiley   +1 more source

Direct, One-Pot Reductive Alkylation of Anilines with Functionalized Acetals Mediated by Triethylsilane and TFA. Straightforward Route for Unsymmetrically Substituted Ethylenediamine [PDF]

open access: yes, 2015
none5A new, robust, and reliable method has been developed for the selective reductive N-alkylation of primary and secondary aromatic amines with some functionalized acetals using TFA/Et 3SiH as a reagent combination.

core   +1 more source

Synthesis of New Some Imidazole Derivatives Containing ?-Lactam Ring [PDF]

open access: yes, 2016
In this work 5-methylene-yl - (2-methy –oxazole-4-one) (1H) imidazole (1) were synthesized from the reaction of L-Histidine with acetic anhydride and which converted to the of 5-methylene-yl-(2-methyl 3-amino imidazole-4-one)-1H-imidazole (2) by reaction
Al-Mouamin, Thanaa Mahdi   +2 more
core   +2 more sources

Математическое описание сорбции этиламинов из воздуха волокнистыми катионитами в условиях ограниченной проницаемости сорбата [PDF]

open access: yes, 2020
A mathematical model for description of the sorption capacity of ion exchangers on alkaline compounds protonizable in aqueous solutions (exemplified by ammonia, mono-, diand triethylamine) was proposed.
A. L. Pushkarchuk   +9 more
core   +2 more sources

Transaminase and Norcoclaurine Synthase One‐Pot Cascades Towards (1S)‐Tetrahydroisoquinolines

open access: yesChemBioChem, Volume 27, Issue 6, 27 March 2026.
A TAm‐NCS cascade towards THIQs has been established, starting from amines with the in situ production of aldehydes. The cascade was used with a variety of nonfunctionalized and functionalized amines, and reaction conditions modified to enhance formation of the desired cross‐products.
Jianxiong Zhao   +5 more
wiley   +1 more source

Catalytic enantioselective synthesis of α-chiral azaheteroaryl ethylamines by asymmetric protonation [PDF]

open access: yes, 2018
The direct enantioselective synthesis of chiral azaheteroarylethylamines from vinyl aza-heterocycles and anilines is reported. A chiral phosphoric acid (CPA) catalyst promotes dearomatizing aza-Michael addition giving a prochiral exocyclic aryl enamine ...
Kennedy, Alan R.   +4 more
core   +4 more sources

Elementspuren in der elektrochemischen reduktiven Aminierung von Aceton: Enthüllung von Bi als Ersatz für Pb

open access: yesAngewandte Chemie, Volume 138, Issue 13, 23 March 2026.
Diese Studie untersucht den Einfluss von Spuren diverser Elemente des p‐Blocks in der elektrochemischen reduktiven Aminierung, wobei sich für Pb mit Bi eine weniger toxische Alternative gezeigt hat. Die Verwendung von Bi als Additiv wurde weiter optimiert, indem der Einfluss der Additivkonzentration, der Reaktionstemperatur und des Kathodenmaterials ...
Justus Kümper   +5 more
wiley   +1 more source

Alkene aminations catalysed by transition metals [PDF]

open access: yes, 1986
Amines, especially long chain tertiary alkylamines, are industrially useful compounds with a relatively high commercial value. They are currently synthesised by a variety of multi-step processes, but a simple "one pot" catalytic synthesis is a highly ...
Nuttall, Peter
core  

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