Results 11 to 20 of about 229,143 (305)

How cinchona alkaloid-derived primary amines control asymmetric electrophilic fluorination of cyclic ketones. [PDF]

open access: yes, 2014
The origin of selectivity in the α-fluorination of cyclic ketones catalyzed by cinchona alkaloid-derived primary amines is determined with density functional calculations.
Houk, KN, Lam, Yu-hong
core   +4 more sources

Structure-activity relationships of synthetic analogs of jasmonic acid and coronatine on induction of benzo[c]phenanthridine alkaloid accumulation in Eschscholzia californica cell cultures [PDF]

open access: yes, 2000
A facile test system based on the accumulation of benzo[c]phenanthridine alkaloids in Eschscholzia californica cell suspension culture (an indicator of defense gene activation) has been used to analyze a series of synthetic compounds for elicitor-like ...
Dzink J.L.   +5 more
core   +1 more source

Poison Frog Colors Are Honest Signals Of Toxicity, Particularly For Bird Predators [PDF]

open access: yes, 2012
Antipredator defenses and warning signals typically evolve in concert. However, the extensive variation across taxa in both these components of predator deterrence and the relationship between them are poorly understood.
Cummings, Molly E., Maan, Martine E.
core   +7 more sources

Isolation and X-ray crystal structure of tetrahydroisoquinoline alkaloids from Calycotome villosa Subsp. intermedias [PDF]

open access: yes, 2004
Two tetrahydroisoquinoline alkaloids were extracted from the alkaloid fraction of a methanol extract of the seeds of Calycotome Villosa Subsp. intermedia.
Bolte, Michael   +6 more
core   +2 more sources

Analysis of alkaloids (indole alkaloids, isoquinoline alkaloids, tropane alkaloids)

open access: yes, 2020
Alkaloids are a large cluster of molecules found in Mother Nature all over the world. They are all secondary compounds and collection of miscellaneous elements and biomolecules, derived from amino acids or from transamination. This diverse chemical group is categorized, based on the amino acids that deliver their nitrogen atom and part of their ...
Dey, Prasanta   +7 more
openaire   +1 more source

Application of recombinant DNA technology to studies on plant secondary metabolism [PDF]

open access: yes, 2001
This review which is concerned with the application of recombinant DNA technology to studies on plant secondary metabolism, presents the more common plant transformation strategies and shows how these genetic approaches are being used in attempts to ...
Yeoman, Michael M., Zárate, Rafael
core   +1 more source

Involvement of the leaf-specific multidrug and toxic compound extrusion (MATE) transporter Nt-JAT2 in vacuolar sequestration of nicotine in Nicotiana tabacum [PDF]

open access: yes, 2014
Alkaloids play a key role in higher plant defense against pathogens and herbivores. Following its biosynthesis in root tissues, nicotine, the major alkaloid of Nicotiana species, is translocated via xylem transport toward the accumulation sites, leaf ...
Goossens, Alain   +11 more
core   +4 more sources

Advancements in lead therapeutic phytochemicals polycystic ovary syndrome: A review

open access: yesFrontiers in Pharmacology, 2023
Polycystic ovary syndrome (PCOS) is one of the most common endocrine diseases in women of reproductive age and features complex pathological symptoms and mechanisms.
Er-Dan Luo   +10 more
doaj   +1 more source

Advantages of trend analysis in stability studies for prediction of potential OOS result within estimated shelflife of medicinal product [PDF]

open access: yesMakedonsko Farmacevtski Bilten
Stability studies are crucial for pharmaceutical product registration, providing vital data to assess batch-to-batch consistency, monitor critical quality attributes, and ensure the product's quality, safety, and efficacy over its entire shelf life ...
Milena Nanov   +4 more
doaj   +1 more source

Influence of different formulations and granulation techniques on dissolution of folic acid in film coated tablets [PDF]

open access: yesMakedonsko Farmacevtski Bilten, 2011
The vitamin folic acid has received considerable attention because of it′s role in decreasing risk of neural tube birth defects, and it′s potential role in reducing risks of cardiovascular and psychiatric diseases.
Ljiljana Krsteska   +4 more
doaj  

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