Results 101 to 110 of about 2,487,421 (286)

Discovery of the eclipse in the symbiotic binary Z Andromedae [PDF]

, 2003
Our photometric observations of the symbiotic binary Z And during its recent (2000 -- 2003) active phase revealed a minimum in the U, B and V light curves (LC) at the position of the inferior conjunction of its cool component (the orbital phase 'phi' = 0)
A. Skopal, Cardelli, Fernández-Castro, Formiggini, Isliker, Mattei, Mikolajewska, Mürset, Nussbaumer, Schmid, Skopal, Skopal, Skopal, Skopal, Sokoloski, Swings   +15 more
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Substrate-based atom waveguide using guided two-color evanescent light fields

, 2000
We propose a dipole-force linear waveguide which confines neutral atoms up to lambda/2 above a microfabricated single-mode dielectric optical guide.
A. Ashkin, A. Ashkin, A. Derevianko, A. H. Barnett, A. W. Adams, C. Cohen-Tannoudji, C. Cohen-Tannoudji, C. G. Aminoff, C. Henkel, C. S. Adams, D. Marcuse, E. A. Hinds, E. A. Hinds, E. A. J. Marcatili, E. Snitzer, G. Labeyrie, G. Rempe, H. Ito, H. Ito, H. Kogelnik, H. Mabuchi, I. E. Dzyaloshinskii, J. B. Davies, J. D. Weinstein, J. Denschlag, J. Fortagh, J. H. Thywissen, J. P. Dowling, J. P. Gordon, K. S. Johnson, L. Spruch, M. A. Olshanii, M. J. Renn, M. Olshanii, M. Olshanii, M. Prentiss, P. Desbiolles, P. Desbiolles, P. Mezza, R. Grimm, R. J. Cook, R. Kaiser, S. Chu, S. Kawata, S. Kawata, S. P. Smith, S. Selleri, S. V. Nitta, T. A. Savas, T. Bergeman, T. Cheon, T. Esslinger, V. I. Balykin, W. D. Phillips, W. Ketterle, Y. Lu, Yu. B. Ovchinnikov, Yu. B. Ovchinnikov, Yu. B. Ovchinnikov, Z-C. Yan   +59 more
core   +1 more source

Linking photoreceptor excitation to changes in plant architecture [PDF]

, 2012
Plants sense neighbor proximity as a decrease in the ratio of red to far-red light, which triggers a series of developmental responses. In Arabidopsis, phytochrome B (PHYB) is the major sensor of shade, but PHYB excitation has not been linked directly to
Breton, G., Chory, J., Cole, B. J., Cowing-Zitron, C., Ecker, J. R., Ivans, L. J., Jung, H. S., Kay, S. A., Li, L., Ljung, K., Pedmale, U. V., Pruneda-Paz, J., Schmitz, R. J.   +12 more
core   +1 more source

Peculiar Type II Supernovae from Blue Supergiants [PDF]

, 2011
The vast majority of Type II supernovae (SNe) are produced by red supergiants (RSGs), but SN 1987A revealed that blue supergiants (BSGs) can produce members of this class as well, albeit with some peculiar properties.
Aldering, Alexei V. Filippenko, Anderson, Arcavi, Arnett, Arnett, Baklanov, Barbon, Barbon, Baron, Bessell, Blinnikov, Cardelli, Chieffi, Daniel Kasen, Dessart, Dessart, Dessart, Dessart, Dovi Poznanski, Eastman, Fabricant, Filippenko, Filippenko, Filippenko, Filippenko, Foley, Ganeshalingam, Hamuy, Hamuy, Hamuy, Hamuy, Hamuy, Hanuschik, Horne, Io K. W. Kleiser, Jeffrey M. Silverman, Jha, Jones, Kasen, Kirshner, Kirshner, Langer, Leonard, Leonard, Leonard, Leonard, Li, Li, Li, Madison, Matheson, Matheson, Miller, Modjaz, Mohan Ganeshalingam, Nadyozhin, Nugent, Olivares, Papenkova, Pastorello, Peter Challis, Peter E. Nugent, Popov, Poznanski, Poznanski, Richmond, Robert P. Kirshner, Ryan Chornock, Schlegel, Schmitz, Shigeyama, Smartt, Springob, Storm, Thomas Matheson, Timothy R. Young, Turatto, Utrobin, Utrobin, Utrobin, Wade, Weidong Li, Woodings, Woosley, Woosley, Woosley, Young   +87 more
core   +1 more source

Promiscuous stimulation of HSP70 ATPase activity by parasite‐derived J‐domains

FEBS Open Bio, EarlyView.
The malaria parasite Plasmodium falciparum exports three highly homologous yet functionally divergent J‐domain proteins into human erythrocytes. Here, we show that J‐domains isolated from all three proteins effectively stimulate the ATPase activity of both endogenous host and exported parasite HSP70 chaperones.
Julian Barth, Moritz Koch, Le‐Han Rössner, Johanna Eichhorn, Denys Pogoryelov, Matthias P. Mayer, Jude M. Przyborski   +6 more
wiley   +1 more source

Coupling Modelling and Experiments to Analyse Leaf Photosynthesis Under Far-Red Light. [PDF]

Plant Cell Environ
ABSTRACTLeaf photosynthesis models are used extensively in photosynthesis research and are embedded in many larger scale models. Typical photosynthesis models simplify light intensity as the integrated intensity over the 400–700 nm waveband (photosynthetic active radiation, PAR).
Jans TB, Mossink L, Wassenaar M, Wientjes E, Driever S, Huber M, Pierik R, de Boer HJ.   +7 more
europepmc   +5 more sources

Quantity over quality: light intensity, but not red/far-red ratio, affects extrafloral nectar production in Senna mexicana var. chapmanii [PDF]

, 2015
Extrafloral nectar (EFN) mediates food-for-protection mutualisms between plants and insects and provides plants with a form of indirect defense against herbivory.
Koptur S., Koptur S., Wagner D.
core   +2 more sources

Chameleon sequences reveal structural effects in proteins representing micelle‐like distribution of hydrophobicity

FEBS Open Bio, EarlyView.
Amino acids sequence of two different proteins with the same sequence (chameleon sequence—black boxes) represent in 3D structure of the proteins different secondary structures: HHHH—helical and BBB—Beta‐structural. The chains folded in water environment adopt different III‐order structures in which the chameleon fragments appear to adopt similar status
Irena Roterman, Katarzyna Stapor, Leszek Konieczny, Krzysztof Gądek, Piotr Nowakowski   +4 more
wiley   +1 more source