Results 21 to 30 of about 79,429 (193)

Pyrrolizidine-Derived Alkaloids: Highly Toxic Components in the Seeds of Crotalaria cleomifolia Used in Popular Beverages in Madagascar

Molecules, 2021
Seeds of Crotalaria cleomifolia (Fabaceae) are consumed in Madagascar in preparation of popular beverages. The investigation of extracts from the seeds of this species revealed the presence of high amounts of alkaloids from which two pyrrolizidine ...
Anjaramampionona Henintsoa Duvale Solofomalala, Clara Fredeline Rajemiarimoelisoa, Randriamampianina Lovarintsoa Judicael, Hanitra Ranjana Randrianarivo, Danielle Aurore Doll Rakoto, Victor Louis Jeannoda, Ahcène Boumendjel   +6 more
doaj   +1 more source

Effects and mechanisms of natural alkaloids for prevention and treatment of osteoporosis

Frontiers in Pharmacology, 2022
Natural alkaloids are polycyclic, nitrogen-containing, and basic compounds obtained from plants. In this review, the advances in bioactive alkaloids with respect to their chemical structures, herbal sources, and effects for the prevention and treatment ...
Bingfeng Lin, Pingcui Xu, Juan Zheng, Xuehui Deng, Qitao Ye, Zhongping Huang, Nani Wang   +6 more
doaj   +1 more source

PYRROLIZIDINE ALKALOIDS OF CERINTHE GLABRA MILLER (BORAGINACEAE)

Zagazig Journal of Pharmaceutical Sciences, 2004
The pyrrolizidine alkaloids of Cerinthe glabra Miller (total yield 0.3 mg/g dry weight) was investigated by capillary GLC and GLC-MS in combination with retention indices.
Assem El-Shazly
doaj   +1 more source

The Relationship between Structurally Different Pyrrolizidine Alkaloids and Western Flower Thrips Resistance in F2 Hybrids of Jacobaea vulgaros and Jacobaea aquatica [PDF]

, 2011
Segregating plant hybrids often have more ecological and molecular variability compared to parental species, and are therefore useful for studying relationships between different traits, and the adaptive significance of trait variation.
Vrieling, K., Kirk, H., Cheng, D., Kirk, H.E., Klinkhamer, P.G.L., Mulder, P.P.J., Klaas Vrieling, Dandan Cheng, Heather Kirk, Peter G. L. Klinkhamer, Patrick P. J. Mulder   +10 more
core   +1 more source

Simultaneous determination of 7 pyrrolizidine alkaloids and their nitrogen oxides in herbal tea by SPE-UPLC-MS/MS [PDF]

Zhongguo niangzao
A analysis method for simultaneous determination of 7 pyrrolizidine alkaloids and their nitrogen oxides (monocrotaline, monocrotaline N- oxide, lycopsamine, lycopsamine-N-oxide, heliosinine, heliosinine-N-oxide, senecionine) in herbal tea was established
WU Zhongling, HE Zhongqiang, HUANG Zhining, SU Ruifen, CHEN Liting, ZHONG Junwei
doaj   +1 more source

Diet and chemical defence in ladybird beetles (Coleoptera: Coccinellidae)

European Journal of Entomology, 2022
In this paper, I review the effects of the diet of ladybirds on chemical defence in this group of beetles. The tendency to reflex bleed and the diversity of autogenously produced alkaloids in different taxa may be evolutionarily related to diet and the ...
John J. SLOGGETT
doaj   +1 more source

Pyrrolizidine alkaloids from Bulgarian species of the genus Senecio [PDF]

Journal of the Serbian Chemical Society, 2006
Nine Bulgarian species from the genus Senecio were studied phytochemically and/or by GC-MS analysis. Senecivernine-N-oxide was isolated and identified by spectral data for the first time.
Kostova Nadezhda, Christov Veselin, Cholakova Maia, Nikolova Elena, Evstatieva Liuba   +4 more
doaj   +3 more sources

Pyrrolizidine Alkaloids and Fatty Acids from the Endemic Plant Species Rindera umbellata and the Effect of Lindelofine-N-oxide on Tubulin Polymerization

Molecules, 2013
The examination of the aerial parts, roots, and seeds of the endemic plant Rindera umbellata is reported in this paper for the first time. Phytochemical investigation of R.
Vlatka V. Vajs, Vele V. Tešević, Snežana D. Nikolić-Mandić, Snežana S. Trifunović, Miroslav M. Novaković, Ljubodrag V. Vujisić, Ivan M. Vučković, Milena R. Simić, Boris M. Mandić, Slobodan M. Milosavljević   +9 more
doaj   +1 more source

Phytochemistry, Toxicology and Therapeutic Value of Petasites hybridus Subsp. Ochroleucus (Common Butterbur) from the Balkans

Plants, 2020
Petasites hybridus (Common butterbur) is extensively used in traditional medicine, and is currently gaining interest and popularity as a food supplement and for its medicinal properties.
Tatjana Mihajilov-Krstev, Boris Jovanović, Bojan Zlatković, Jelena Matejić, Jelena Vitorović, Vladimir Cvetković, Budimir Ilić, Ljubiša Đorđević, Nataša Joković, Dragoljub Miladinović, Tatjana Jakšić, Nemanja Stanković, Vesna Stankov Jovanović, Nirit Bernstein   +13 more
doaj   +1 more source

Pyrrolizidine alkaloids: occurrence, biology, and chemical synthesis [PDF]

, 2016
This review covers the isolation and structure of new pyrrolizidines; pyrrolizidine biosynthesis; biological activity, including the occurrence of pyrrolizidines as toxic components or contaminants in foods and beverages; and formal and total syntheses ...

core   +1 more source