Results 31 to 40 of about 33,127 (238)

The expression of stlA in Photorhabdus luminescens is controlled by nutrient limitation [PDF]

open access: yes, 2013
Photorhabdus is a genus of Gram-negative entomopathogenic bacteria that also maintain a mutualistic association with nematodes from the family Heterorhabditis.
Bode, Helge Björn   +3 more
core   +7 more sources

Biologically active compounds from selected aphyllophorales mycelial cultures [PDF]

open access: yes, 2014
The obtained results confirm the hypothesis that mycelial cultures of domestic species of aphyllophorales are able to accumulate biologically active metabolites.Uzyskane wyniki wskazują, że przebadane kultury mycelialne krajowych gatunków grzybów ...
Firlej, Anna   +2 more
core   +2 more sources

Studies of the physiology, pharmacology, and biochemistry of the auxins [PDF]

open access: yes, 1952
Several excellent reviews of auxin matters have appeared during the past few years dealing broadly with the subject as a whole, such as the Wisconsin Symposium on Plant Growth Substances whleh is referred to repeatedly below, as well as reviews of more ...
Bandurski­, Robert S., Bonner, James
core   +1 more source

Opium trade and use during the Late Bronze Age: Organic residue analysis of ceramic vessels from the burials of Tel Yehud, Israel

open access: yesArchaeometry, EarlyView., 2022
Abstract Organic residue analysis was conducted on various vessels from burials at Tel Yehud, Israel. The analyses led to new reliable evidence for the presence of opioid alkaloids and their decomposition products. This research revitalizes a decades‐old discussion on the presence and function of the opium trade across a cultural region of utmost ...
Vanessa Linares   +5 more
wiley   +1 more source

Novel chalcone-based fluorescent human histamine H 3 receptor ligands as pharmacological tools [PDF]

open access: yes, 2012
Novel fluorescent chalcone-based ligands at human histamine H(3) receptors (hH(3)R) have been designed, synthesized, and characterized. Compounds described are non-imidazole analogs of ciproxifan with a tetralone motif.
Tomasch, Miriam   +3 more
core   +1 more source

Biosynthesis of lignans. Part I . Biosynthesis of Arctiin (3) and Phillyrin (5) [PDF]

open access: yes, 1977
Lignans constitute a class of naturally occuring phenolic compounds, widely distributed in higher plants. They are formally composed of two phenylpropanoid units, stercospecifically joined at the /f-carbon atoms of their side chains. Their biosynthesis
Klischies, Martina, Stöckigt, Joachim
core   +1 more source

Merging Biocatalysis and Chemocatalysis in Flow: State‐of‐the‐Art and Future Directions for Sustainable Synthesis

open access: yesAngewandte Chemie, EarlyView.
This review highlights recent advances in integrating biocatalysis and chemocatalysis in continuous flow to create streamlined, sustainable processes. It examines chemo‐enzymatic cascades combining at least one enzymatic and one chemical step, discusses challenges such as enzyme immobilization, leaching, and reactor clogging, and presents solutions ...
Petros Siasiaridis   +2 more
wiley   +2 more sources

Schinus terebinthifolius Leaf Extract Causes Midgut Damage, Interfering with Survival and Development of Aedes aegypti Larvae. [PDF]

open access: yesPLoS ONE, 2015
In this study, a leaf extract from Schinus terebinthifolius was evaluated for effects on survival, development, and midgut of A. aegypti fourth instar larvae (L4), as well as for toxic effect on Artemia salina. Leaf extract was obtained using 0.15 M NaCl
Thamara Figueiredo Procópio   +10 more
doaj   +1 more source

Molecular phenotyping of the pal1 and pal2 mutants of Arabidopsis thaliana reveals far-reaching consequences on phenylpropanoid, amino acid, and carbohydrate metabolism [PDF]

open access: yes, 2004
The first enzyme of the phenylpropanoid pathway, Phe ammonia-lyase (PAL), is encoded by four genes in Arabidopsis thaliana. Whereas PAL function is well established in various plants, an insight into the functional significance of individual gene family ...
Boerjan, Wout   +13 more
core   +3 more sources

Strategies Toward Accessing Enantioenriched (Hetero)Benzo‐Fused 5‐ and 6‐ Membered Rings via Intermolecular Carbometalation

open access: yesAngewandte Chemie, EarlyView.
The use of transition‐metal catalysts and design of chiral ligands have allowed chemists to access highly functionalized benzofused 5‐ and 6‐ membered rings in high yield and enantioselectivity. A common strategy used relies on an intermolecular carbometalation across alkynes and olefins, usually followed by a subsequent intramolecular carbometalation.
Clara Jans   +3 more
wiley   +2 more sources

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