Results 61 to 70 of about 30,773 (318)

Data set for Gambung green tea aroma using on electronic nose

BMC Research Notes
Objectives In recent years, there has been much discussion and research on electronic nose (e-nose). This topic has developed mainly in the medical and food fields.
Dedy Rahman Wijaya, Rini Handayani, Muhammad Dzakyyuddin Badri, Shabri Shabri, Vitria Puspitasari Rahadi   +4 more
doaj   +1 more source

SYNTHESIS OF THREE NEW BIFUNCTIONAL GLUCOSE-THIOUREA ORGANOCATALYSTS AND THEIR APPLICATION IN ASYMMETRIC MICHAEL ADDITION

Studia Universitatis Babes-Bolyai Chemia, 2017
Three new glucose-based asymmetric bifunctional organocatalysts containing a 6-aminopyridyl or a 6-methylpyridyl or a cinchona unit were synthesized. Asymmetric Michael addition of pentane-2,4-dione to β-nitrostyrene was catalyzed successfully by these ...
Sándor NAGY, Petra KOZMA, Péter KISSZÉKELYI, Dóra BEZZEGH, Péter HUSZTHY, József KUPAI   +5 more
doaj   +1 more source

Cerebral malaria and the story of Quinine and the Fever Trees

Advances in Clinical Neuroscience & Rehabilitation, 2020
Cinchona bark was first recorded as a cure for malaria by the Spanish in Peru around 1630. A Spanish missionary allegedly learned of the treatment from the Indian natives.
JMS Pearce
doaj   +1 more source

Reconnecting the Cinchona (Rubiaceae) collections of the “Real Expedición Botánica al Virreinato del Perú” (1777-1816)

Anales del Jardín Botánico de Madrid, 2022
During the “Real Expedición Botánica al Virreinato del Perú”, 1777-1816, Hipólito Ruiz López (1754-1816), José Antonio Pavón Jiménez (1754-1840), Juan José Tafalla Navascués (1755-1811) and Juan Agustín Manzanilla (fl.
Kim Walker, Esther García Guillén, Nataly Allasi Canales, Leopoldo Medina, Felix Driver, Nina Rønsted, Mark Nesbitt   +6 more
doaj   +1 more source

Recyclable fluorous cinchona alkaloid ester as a chiral promoter for asymmetric fluorination of β-ketoesters

Beilstein Journal of Organic Chemistry, 2012
A fluorous cinchona alkaloid ester has been developed as a chiral promoter for the asymmetric fluorination of β-ketoesters. It has comparable reactivity and selectivity to the nonfluorous versions of cinchona alkaloids and can be easily recovered from ...
Wen-Bin Yi, Xin Huang, Zijuan Zhang, Dian-Rong Zhu, Chun Cai, Wei Zhang   +5 more
doaj   +1 more source

Pertumbuhan Setek Sambung Kina (Cinchona sp.) Klon QRC Akibat Perbedaan Panjang Setek Batang Atas

Jurnal Agro, 2016
Penelitian yang bertujuan untuk mempelajari pengaruh variasi panjang setek terhadap  pertumbuhan setek sambung kina (Cinchona sp) klon QRC telah dilaksanakan di kebun percobaan Pusat Penelitian Teh dan Kina (PPTK) Gambung, Kabupaten Bandung, dengan ...
Joko Santoso, Yayo Fatimah, Merry Antralina, Dina Aryati   +3 more
doaj   +1 more source

Estimación de la calidad de sitio de Cinchona pubescens (Rubiaceae), en el bosque montano La Palma, Chota, Perú

Lilloa, 2023
El género Cinchona L. (Rubiaceae) agrupa 23 especies, de las cuales 19 se encuentran distribuidas en Perú. Pese a ser un género importante a nivel mundial, sus hábitats están siendo degradados de manera acelerada, sin contar con investigaciones sobre la
Yennifer L. Rufasto-Peralta, Juan R. Baselly-Villanueva, Denisse M. Alva-Mendoza, Alejandro Seminario-Cunya, Duberli G. Elera-Gonzales, Jim J. Villena-Velásquez   +5 more
doaj   +1 more source

Organocatalytic stereodivergent synthesis of β,β-disubstituted-α-aminoacids [PDF]

, 2017
In this work, we present an organocatalytic stereodivergent synthesis of β,β-disubstituted-α-aminoacids using arylidene azlactones as starting materials.
Martinelli, Ada
core  

Chiral separation by enantioselective liquid–liquid extraction [PDF]

, 2011
The literature on enantioselective liquid–liquid extraction (ELLE) spans more than half a century of research. Nonetheless, a comprehensive overview has not appeared during the past few decades.
Feringa, Ben L.,, Heeres, Hero J.,, Minnaard, Adriaan J.,, Schuur, Boelo,, Verkuijl, Bastiaan J.V.,, Vries, Johannes G. de,   +5 more
core   +3 more sources

Cinchona Squaramide-Based Chiral Polymers as Highly Efficient Catalysts in Asymmetric Michael Addition Reaction

ACS Omega, 2018
We have synthesized novel chiral polymers containing a cinchona-based squaramide in the main chain. We designed a novel cinchona squaramide dimer that contains two cinchona squaramide units connected by diamines. The olefinic double bonds in the cinchona
M. Ullah, S. Itsuno
semanticscholar   +1 more source