Results 61 to 70 of about 168,537 (253)

Carboxylate–Probase Catalyzed Favorskii Reaction

Chemistry – A European Journal, EarlyView.
Stronger together: A combination of a carboxylate catalyst and a silylating agent generates a stronger base catalyst for a metal‐free catalytic addition of alkynes to aldehydes and ketones under chemoselective, O‐silylative conditions. The reaction is proposed to proceed via quaternary ammonium (Q+) cation – acetylide anion ion pairs, with chiral ...
Anton Bannykh, Sanna M. Stenfors, Anton Nechaev, John M. Fiskari, Petri M. Pihko   +4 more
wiley   +1 more source

A new quinolizidine alkaloid from Boehmeria siamensis

, 2001
A new quinolizidine alkaloid. 3-(4-hydroxyphenyl)-4-(3-methoxy-4-hydroxyphenyl)-3,4-dihydroquinolizidi ne (1). was isolated from the ethanol extract of the whole plants of Boehmeria siamensis Craib.
Luo, YG, Li, BG, Zhang, GL
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Perspectives in biomedicine: Superfoods and antioxidant power classification

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract The market value of natural food antioxidants will double to 8 billion USD by 2033, driven by a global consumer demand for ‘clean label’ products and proactive wellness solutions. However, the industrial application and health labelling (commercial brands) of these compounds remain severely constrained by inconsistent analytical methods.
Domenico Fuoco, Gregory S. Patience
wiley   +1 more source

A new proaporphine alkaloid from Meconopsis horridula

, 2009
A new proaporphine alkaloid, 8, 9-dihydroprooxocryptochine (1), together with three known alkaloids, was isolated from the aerial parts of Meconopsis horridula Hook. f. & Thomson (Papaveraceae), a traditional Tibetan medicine.
Zhu, HJ, Zhang, XF, Wu, HF, Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China., Wu, HF, Ding, LS, Shen, JW   +5 more
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Defensive alkaloid variation and palatability in sympatric poison frogs [PDF]

Chemical defense in poison frogs derives from lipophilic alkaloids sequestered from dietary arthropods. Alkaloid composition varies extensively among individuals, populations, and species.
Albuquerque-Pinna, Julia, Kocheff, Sophie, Grant, Taran, Nakamura, Daniel Y. M., Saporito, Ralph A., Jeckel, Adriana M., Bernarde, Paulo Sérgio   +6 more
core   +1 more source

Isoform Specificity of a Compound Targeting Actin Filaments Containing Tropomyosin Tpm1.8/1.9

Cytoskeleton, EarlyView.
ABSTRACT The unbranched actin filaments in mammalian cells are usually composed of co‐polymers of a specific tropomyosin isoform with actin. Genetic manipulation has revealed that the tropomyosins largely define the functional properties of actin filaments in an isoform‐specific, non‐redundant manner.
Jeff Hook, Edna C. Hardeman, Peter W. Gunning   +2 more
wiley   +1 more source

Workflow for investigation of Out of Specification results in physico-chemical laboratory in Alkaloid [PDF]

Makedonsko Farmacevtski Bilten
The efficient and accurate investigation of Out of Specification (OOS) results is crucial in maintaining the reliability and quality of products in a physico-chemical laboratory.
Andrea Alagjozovska, Milena Dobrkovikj Shotarovska, Maja Mindoseva, Stefan Petrovski, Gordana Mitrovska, Sanja Despotovska, Ornela Kuzmanovska, Elizabeta Karadzinska, Olivera Paneva   +8 more
doaj   +1 more source

Induction and in vitro alkaloid yield of calluses and protocorm-like bodies (PLBs) from Pinellia ternata

, 2010
This study investigated the induction and in vitro alkaloid yield of calluses and protocorm-like bodies (PLBs) from Pinellia ternata (Thunb.) Berit (Araceae). We planned to use this material in future studies related to the mass production of medicinally
Liu Yonghong, Zhang Yuejin, Liang, ZS, Liang Zongsuo   +3 more
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Monitoring Injected Drug Use in Greece Through Syringe Residue Analysis: A Multicity Study Within the ESCAPE Network

Drug Testing and Analysis, EarlyView.
A total of 2121 used syringes were analyzed in Athens, Thessaloniki, and Patras between 2022 and 2024. Distinct drug‐use patterns were observed across the three cities. Benzodiazepines, pregabalin, methadone, and fentanyl were increasingly detected in 2024.
Christina Matiaki, Anastasios Trakakis, Athanasios Theocharis, Chara Parpala, Chara Kotsailidou, Alexandros Psarianos, Emmanouil Chatzichristofis, Eleni Zagelidu, Panagiota Roussou, Nikolaos Raikos, Orthodoxia Mastrogianni   +10 more
wiley   +1 more source

Establishing suspension culture of Cephalotaxus fortunei cells for alkaloid production

, 2008
Cephalotaxus fortunei Hook. f., a plant indigenous to China, produces valuable anti-cancer alkaloids (e.g. harringtonine and homoharringtonine) for the treatment of different types of leukemia.
徐晓晖, 张卫, JinguangXu
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