Results 41 to 50 of about 200,471 (302)

Reaction of Thallium(III) Salts with Homoallylic Alcohols: Ring Contraction vs. Dimethoxylation

Molecules, 2005
The oxidation of 2-(3,4-dihydronaphthalen-1-yl)-ethanol (1) with a variety ofthallium(III) salts was investigated. An indan, formed by a ring contraction reaction, wasobtained in good to moderate yields under a variety of reaction conditions: i ...
Marcus V. Craveiro, Luiz F. Silvia
doaj   +1 more source

Variational perturbation approach to the Coulomb electron gas

, 2002
The efficiency of the variational perturbation theory [Phys. Rev. C {\bf 62}, 045503 (2000)] formulated recently for many-particle systems is examined by calculating the ground state correlation energy of the 3D electron gas with the Coulomb interaction.
Bachmann M, Bünemann J, Cea P, Ceperley D M, Fetter A L, Fröhlich J, Gutzwiller M C, Janis V, Krzyweck J, Lu W-F, Mahan G D, Negele J W, Noboru Fukushima, Noh H S, Okopinska A, Okopinska A, Pines D, Ruelle D, Sang Koo You, Schulman L S, Singwi K S, Stevenson P M, Talman J D, You S K, You S K   +24 more
core   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Synthesis of 2,3-dihydronaphtho[2,3-d][1,3]thiazole-4,9-diones and 2,3-dihydroanthra[2,3-d][1,3]thiazole-4,11-diones and novel ring contraction and fusion reaction of 3H-spiro[1,3-thiazole-2,1'-cyclohexanes] into 2,3,4,5-tetrahydro-1H-carbazole-6,11-diones

Beilstein Journal of Organic Chemistry, 2013
Treatment of N-substituted 2-(methylamino)naphthoquinones 3 and -anthracene-1,4-diones 4 with S2Cl2 and DABCO in chlorobenzene gave the corresponding 2,3-dihydronaphtho[2,3-d][1,3]thiazole-4,9-diones 1 and 2,3-dihydroanthra[2,3-d][1,3]thiazole-4,11 ...
Lidia S. Konstantinova, Kirill A. Lysov, Ljudmila I. Souvorova, Oleg A. Rakitin   +3 more
doaj   +1 more source

Collective effects in cellular structure formation mediated by compliant environments: a Monte Carlo study

, 2006
Compliant environments can mediate interactions between mechanically active cells like fibroblasts. Starting with a phenomenological model for the behaviour of single cells, we use extensive Monte Carlo simulations to predict non-trivial structure ...
Bischofs, I. B., Schwarz, U. S.
core   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

MPF governs the assembly and contraction of actomyosin rings by activating RhoA and MAPK during chemical-induced cytokinesis of goat oocytes. [PDF]

PLoS ONE, 2010
The interplay between maturation-promoting factor (MPF), mitogen-activated protein kinase (MAPK) and Rho GTPase during actin-myosin interactions has yet to be determined.
Yan-Guang Wu, Ping Zhou, Guo-Cheng Lan, Da Gao, Qing Li, De-Li Wei, Hui-Li Wang, Jing-He Tan   +7 more
doaj   +1 more source

A coupled mitral valve -- left ventricle model with fluid-structure interaction

, 2017
Understanding the interaction between the valves and walls of the heart is important in assessing and subsequently treating heart dysfunction. With advancements in cardiac imaging, nonlinear mechanics and computational techniques, it is now possible to ...
Brown, André EX, Ch'ng, Quee-Lim, Currie, Michael, Grundy, Laura J, Hokanson, Jim, Javer, Avelino, Kerr, Rex, Lee, Chee Wai, Li, Chris, Li, Kezhi, Schafer, William R, Yemini, Eviatar   +11 more
core   +3 more sources

Genetic attenuation of ALDH1A1 increases metastatic potential and aggressiveness in colorectal cancer

Molecular Oncology, EarlyView.
Aldehyde dehydrogenase 1A1 (ALDH1A1) is a cancer stem cell marker in several malignancies. We established a novel epithelial cell line from rectal adenocarcinoma with unique overexpression of this enzyme. Genetic attenuation of ALDH1A1 led to increased invasive capacity and metastatic potential, the inhibition of proliferation activity, and ultimately ...
Martina Poturnajova, Zuzana Kozovska, Ondrej Pos, Kristina Pavlov, Sachin Gulati, Peter Makovicky, Kristina Jakic, Monika Burikova, Eva Sedlackova, Barbora Svitkova, Silvia Tyciakova, Vojtech Bystry, Nicolas Blavet, Boris Tichy, Matej Hrnciar, Jaroslav Budis, Miroslav Tomas, Peter Dubovan, Georgina Kolnikova, Veronika Repaska, Nikoleta Mojzesova, Eva Zomborska, Daniel Pindak, Michal Mego, Tomas Szemes, Miroslava Matuskova   +25 more
wiley   +1 more source

Implementation of a Random Variable Universefuzzy Controller in Medical Helmet

Journal of Harbin University of Science and Technology, 2023
The current adaptive fuzzy control methods was difficult to achieve good results in practical problems. Aiming at this problem , a fuzzy controller with a random variation domain was proposed. Firstly , a simple and accurate random scaling factor
WANGYue, ZHAOHui, ZHANGYuan, WULunhua
doaj   +1 more source