Results 81 to 90 of about 174,911 (284)

ZZE-Configuration of chromophore ß-153 in C-phycocyanin from Mastigocladus laminosus [PDF]

, 1987
The photochemistry of C-phycocyanin has been studied after denaturation in the dark. It shows an irreversible reaction which has characteristics of a Ζ,Ζ,Ε- to Z,Z,Z-isomerization of dihydrobilins. Its amplitude depends on the reaction conditions, with
Bode, W., Fischer, R., Huber, R., Rüdiger, W., Scheer, Hugo, Schirmer, T., Schmidt, G., Siebzehnrübl, S.   +7 more
core   +1 more source

Stereochemical Research on Cembranes Diterpenoid Sinulariol Z Based on Residual Dipolar Couplings

Chinese Journal of Magnetic Resonance
Research on the stereochemistry of natural products, especially that of flexible macrocyclic molecules, has always been a huge challenge. Cembranes diterpenoids are a typical class of flexible macrocyclic molecules, whose configurations are often ...
SHI Xing, ZHANG Yue, ZHANG Xiuli, WANG Cong   +3 more
doaj   +1 more source

Biologically Important Eremophilane Sesquiterpenes from Alaska Cedar Heartwood Essential Oil and Their Semi-Synthetic Derivatives

Molecules, 2011
The essential oil of Alaska cedar heartwood is known to contain compounds which contribute to the remarkable durability of this species. While previous research has identified several compounds, a complete description of this oil has not been undertaken.
Joe J. Karchesy, Javier Peralta-Cruz, Mohammad A. Khasawneh, Yeping Xiong   +3 more
doaj   +1 more source

Buried chloride stereochemistry in the Protein Data Bank

BMC Structural Biology, 2014
BackgroundDespite the chloride anion is involved in fundamental biological processes, its interactions with proteins are little known. In particular, we lack a systematic survey of its coordination spheres.ResultsThe analysis of a non-redundant set ...
O. Carugo
semanticscholar   +1 more source

Progress in Stereochemistry [PDF]

Nature, 1896
n ...
openaire   +2 more sources

On the mechanism of Dehydroquinate synthase : a thesis presented to Massey University in partial fulfilment of the requirements for the degree of Master of Science in Chemistry [PDF]

, 2001
The aim of this thesis is to investigate the influence of fluorine substitution on the second reaction of the shikimate pathway catalysed by the enzyme 3-dehydroquinate synthase.
Kathirgamanathan, Kalyani
core  

Chiral triazole fungicide difenoconazole: absolute stereochemistry, stereoselective bioactivity, aquatic toxicity, and environmental behavior in vegetables and soil.

Environmental Science and Technology, 2013
In this study, the systemic assessments of the stereoisomers of triazole fungicide difenoconazole are reported for the first time, including absolute stereochemistry, stereoselective bioactivity toward pathogens (Alternaria sonali, Fulvia fulva, Botrytis
F. Dong, Jing Li, B. Chankvetadze, Yong-Cong Cheng, Jun Xu, Xingang Liu, Yuanbo Li, Xiu Chen, C. Bertucci, D. Tedesco, R. Zanasi, Yongquan Zheng   +11 more
semanticscholar   +1 more source

Total synthesis of aurofusarin: studies on the atropisomeric stability of bis-naphthoquinones [PDF]

, 2018
An efficient annulation involving pyrone addition to a quinone and Dieckmann condensation was developed for rapid assembly of a γ-naphthopyrone monomeric precursor to the bis-naphthoquinone natural product aurofusarin.
Allen, Ashley, Bao, Berkessel, Birchall, Bringmann, Bringmann, Chen, Corey, Crimmins, Dao, Donner, Dwyer, Flegel, Frandsen, Gao, Gray, Helder, Jew, Konkol, Lee, Leeper, Liau, Masson, Morishita, Natori, Romaine, Shi, Shibata, Shibata, Shibata, Shirakawa, Shirakawa, Sperry, Sun, Takeya, Takizawa, Varun, Wu, Yeung, Zeeck, Zhang, Ōki   +42 more
core   +1 more source

Polyethers for biomedical applications. Polymerization of propylene oxide by organozinc/organotin catalysts [PDF]

, 1987
The polymerization of propylene oxide to obtain a high-molecular-weight polymer with an atactic structure required for the application as artificial blood vessels was investigated using combinations of organozinc and organotin compounds as catalyst.
Bantjes, Adriaan, Bots, Jan Gert, Broersma, Jaap, Does, Leen van der   +3 more
core   +2 more sources

Regio- and stereochemical stability induced by anomeric and gauche effects in difluorinated pyrrolidines

Beilstein Journal of Organic Chemistry
Selective fluorination of the pyrrolidine ring in proline motifs has been found to induce significant conformational changes that impact the structure and biological roles of modified peptides and proteins.
Ana Flávia Candida Silva, Francisco A. Martins, Matheus P. Freitas   +2 more
doaj   +1 more source