Results 61 to 70 of about 1,024,799 (290)

Ultrasensitive interferometric on-chip microscopy of transparent objects [PDF]

, 2016
Light microscopes can detect objects through several physical processes, such as scattering, absorption, and reflection. In transparent objects, these mechanisms are often too weak, and interference effects are more suitable to observe the tiny ...
Mannelli, Llaria, Pello, Josselin, Pruneri, Valerio, Pérez Torres, Juan, Terborg, Roland A.   +4 more
core   +2 more sources

Synthesis, Cytotoxic Activity Evaluation and Quantitative Structure-ActivityAnalysis of Substituted 5,8-Dihydroxy-1,4-naphthoquinones and Their O- and S-Glycoside Derivatives Tested against Neuro-2a Cancer Cells

Marine Drugs, 2020
Based on 6,7-substituted 2,5,8-trihydroxy-1,4-naphtoquinones (1,4-NQs) derived from sea urchins, five new acetyl-O-glucosides of NQs were prepared. A new method of conjugation of per-O-acetylated 1-mercaptosaccharides with 2-hydroxy-1,4-NQs through a ...
Sergey Polonik, Galina Likhatskaya, Yuri Sabutski, Dmitry Pelageev, Vladimir Denisenko, Evgeny Pislyagin, Ekaterina Chingizova, Ekaterina Menchinskaya, Dmitry Aminin   +8 more
doaj   +1 more source

Evidence of Autonomic Dysfunction in Patients with Relapsing-Remitting Multiple Sclerosis: Heart Rate Variability and Cardiovascular Parameters

Pathophysiology, 2021
This study was aimed at evaluation of autonomic dysfunction in patients with multiple sclerosis (MS) by means of time- and frequency-domain parameters of heart rate variability (HRV) and conventional cardiovascular tests (deep breathing (DB) and active ...
Liudmila Gerasimova-Meigal, Ilya Sirenev, Alexander Meigal   +2 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

HAT-P-50b, HAT-P-51b, HAT-P-52b, and HAT-P-53b: Three Transiting Hot Jupiters and a Transiting Hot Saturn From the HATNet Survey

, 2015
We report the discovery and characterization of four transiting exoplanets by the HATNet survey. The planet HAT-P-50b has a mass of 1.35 M_J and a radius of 1.29 R_J, and orbits a bright (V = 11.8 mag) M = 1.27 M_sun, R = 1.70 R_sun star every P = 3.1220
Bakos, Gáspár Á., Bhatti, Waqas, Bieryla, Allyson, Boisse, Isabelle, Buchhave, Lars A., Béky, Bence, Csubry, Zoltan, de Val-Borro, Miguel, Everett, Mark E., Falco, Emilio, Fulton, Benjamin J., Hansen, Terese, Hartman, Joel D., Howard, Andrew W., Isaacson, Howard, Johnson, John A., Kovács, Géza, Kovács, Tamas, Latham, David W., Lázár, József, Marcy, Geoff W., Noyes, Robert W., Papp, Istvan, Penev, Kaloyan, Sato, Bun'ei, Shporer, Avi, Szklenar, Tamas, Sári, Pál, Torres, Guillermo   +28 more
core   +3 more sources

Fluctuating spin density waves in metals [PDF]

, 2009
Recent work has used a U(1) gauge theory to describe the physics of Fermi pockets in the presence of fluctuating spin density wave order. We generalize this theory to an arbitrary band structure and ordering wavevector.
Cenke Xu, Max A. Metlitski, S. Sachdev, Subir Sachdev, Yang Qi   +4 more
core   +2 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

New, Highly Accurate Propagator for the Linear and Nonlinear Schr\"odinger Equation

, 2012
A propagation method for the time dependent Schr\"odinger equation was studied leading to a general scheme of solving ode type equations. Standard space discretization of time-dependent pde's usually results in system of ode's of the form u_t -Gu = s ...
A. Alvermanna, C. Leforestier, D. Kosloff, D.J. Tannor, H. Tal Ezer, H. Tal Ezer, H. Tal Ezer, H.-D. Meyer, Hillel Tal-Ezer, Ido Schaefer, J.P. Palao, M. Caliari, M. Hochbruck, M. Hochbruck, M. Hochbruck, M. Ndong, M. Ndong, M.D. Feit, N.J. Higham, Ronnie Kosloff, U. Peskin   +20 more
core   +1 more source

Impedance Analysis of Bunch Length Measurements at the ATF Damping Ring [PDF]

, 2001
We present energy spread and bunch length measurements at the Accelerator Test Facility (ATF) at KEK, as functions of current, for different ring rf voltages, and with the beam both on and off the coupling resonance.
Bane, K. L. F., Naito, T., Okugi, T., Qin, Q., Urakawa, J.   +4 more
core   +3 more sources