The photosynthetic reaction center (RC) of purple bacteria acts as a proton pump based on redox reactions where the quinone molecule QB is the mobile carrier for the electrons and the protons. Since the quinone QB is buried within the protein (15 from the protein surface), the protons might...
This atom has equal numbers of protons and electrons. Additionally, the number of valence electrons is directly predicted from the group position of the element in the table. You can add or subtract valence electrons from the starting count. The atom is now present as a simple ion with a ...
The generated hydroquinone QBH2 then carries the electrons and protons to the cytochrome bc1 complex in a cycle that generates the proton gradient needed for the creation of energy-rich compounds. The two BChls that form P overlap at the ring A position with a separation distance of 3.5 A...
Atomic and Ionic Radius: There are several factors affecting the radius of an atom or an ion. The first one is the number of electrons. Usually, the higher the number of electrons, the larger the species gets. Another factor is...
1 All of the atoms in alkali metals have one electron in their outer electron shells. To become stable they have to give off one electron to elements with seven electrons in their outer shell making it eight, also stable. Then they become single charged positive ions (cations). Melting ...
Stored beams of polarized protons, electrons, or deuterons can be spin flipped by sweeping an rf dipole's or solenoid's frequency through an rf spin resona... AD Krisch,MA Leonova,VS Morozov,... - 《Review of Modern Physics》 被引量: 24发表: 2007年 ...
- 1990 () Citation Context ...c in the periplasm, delivering these two electrons along with two protons from the cytoplasm to QB. The reduced dihydroubiquinone is released to the cell membrane, and a new oxidized quinone is bound =-=(17)-=-. In the cell, electron transfer from the ...
- 1990 () Citation Context ...c in the periplasm, delivering these two electrons along with two protons from the cytoplasm to QB. The reduced dihydroubiquinone is released to the cell membrane, and a new oxidized quinone is bound =-=(17)-=-. In the cell, electron transfer from the ...
We develop amodel in which thebroad band emission from thebinary system is produced in resultof collisions of GeV–TeV energy protons accelerated by thepulsar wind and interacting with thestellar disk. In this modelthehigh energy γ-rays are produced in thedecays of secondary neutral pions, ...
All must have 36 electrons, include a two anions and two cations. Compare both the numbers of protons and electrons present in each to rank the following ions in order of increasing radius: As^{3-}, Br^-, K^+, Mg^{2+}. Explain. Arrange th...