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Where did all the antimatter go? After the Big Bang, matter and antimatter should have been created in equal amounts. Why we live in a Universe of matter, with very little antimatter, remains a myster...
Despite its minute size, a single cell contains billions of molecules that bustle around and bind to one another, carrying out vital functions. The human genome encodes about 20,000 proteins, most of ...
Nuclear Science and Engineering Associate Professor Nuno Loureiro has spent his first year and a half at MIT’s Plasma Science and Fusion Center (PSFC) exploring the magnetic processes crucial to under...
Probing the Structure of Supported Membranes and Tethered Oligonucleotides by Fluorescence Interference Contrast Microscopy
Water Oligonucleotides Microscopy, Fluorescence Microscopy, Interference Membranes, Artificial Sensitivity and Specificity Surface Properties Models, Chemical Silicon Dioxide
2016/5/24
Fluorescence interference contrast microscopy (FLIC) is a powerful method to structurally characterize fluorescent objects with nanometer-scale resolution in the z direction. Here we use FLIC to chara...
Probing Excited-State Electron Transfer by Resonance Stark Spectroscopy:4.Mutations near BL in Photosynthetic Reaction Centers Perturb Multiple Factors that Affect BL/fBL+HL
Excited-State Electron Transfer Resonance Stark Spectroscopy Mutations near BL Photosynthetic Reaction Centers Perturb Multiple Factors BL/fBL+HL
2016/5/24
Stark spectra have been obtained in the region of absorption by the accessory bacteriochlorophylls (the B-band region around 800 nm) in Rhodobacter sphaeroides reaction centers. The Stark spectra in t...
Probing Excited-State Electron Transfer by Resonance Stark Spectroscopy:3.Theoretical Foundations and Practical Applications
contracted basis Lanczos algorithm methane vibrational spectroscopy
2016/5/24
Resonance Stark effects are nonclassical Stark effects associated with excited-state charge-transfer processes. The theory of resonance Stark effects developed in Part 2 of this series is generalized ...
Probing Protein Electrostatics with a Synthetic Fluorescent Amino Acid
pteropod aragonite flux East Sea (Sea of Japan)
2016/5/24
Electrostatics affect virtually all aspects of protein structure and activity and are particularly important in proteins whose primary function is to stabilize charge. Here we introduce a fluorescent ...
Probing Excited State Electron Transfer by Resonance Stark Spectroscopy.II.Theory and Application
Excited State Electron Resonance Stark Spectroscopy Theory Application
2016/5/23
A theory of the resonance Stark effect data reported in part 1 (preceding paper in this issue) is developed. The model used involves a weak charge resonance interaction between the excited state of an...
Probing Excited State Electron Transfer by Resonance Stark Spectroscopy.I.Experimental Results for Photosynthetic Reaction Centers
adatoms bismuth photoelectron diffraction silicon
2016/5/23
Higher order Stark spectroscopy has recently been introduced and applied to characterize the electrooptic properties of chromophores in bacterial photosynthetic reaction centers.1 In the course of the...
Every second, trillions of neutrinos travel through your body unnoticed. Neutrinos are among the most abundant particles in the universe, but they are difficult to study because they very rarely inter...
GPS radio occultation measurements establish the basis for a new remote sensing technique for vertical profile information on the electron density of the entire ionosphere from satellite orbit
height...
The addition of molecular genetic tools to oceanographic toolboxes began with a pronounced emphasis on ribosomal RNAs (rRNAs). Already these molecules have been used to detect and examine the abundanc...
We have used the Far Ultraviolet Spectroscopic Explorer to search for O VI λλ1031.926, 1037.617 emission in the halos of the edge-on spiral galaxies NGC 4631 and NGC 891. In NGC 4631, we detected O VI...
Probing the Local Group Medium toward Markarian 421 with Chandra and the Far Ultraviolet Spectroscopic Explorer
halo intergalactic medium
2014/12/24
We report the detection of highly ionized gas at z ~ 0 seen in resonant UV and X-ray absorption lines toward the z = 0.03 blazar Mrk 421. A total of 13 X-ray and three UV lines were measured (or upper...
Using high-resolution cosmological simulations, we study hydrogen and helium gravitational cooling radiation from gas accretion by young galaxies. We focus on the He II cooling lines, which arise from...