منابع مشابه
Isir Subpicosecond Pulse Radiolysis System
The highest time resolution of the pulse radiolysis had remained about 30 ps since the late 1960’s. To make clear the primary processes in the radiation chemistry and physics within 30 ps, we developed a stroboscopic pulse radiolysis system for the absorption spectroscopy with the time resolution of 2.0 ps (10-90% rise time). The time resolution of 2.0 ps was estimated from the time-dependent b...
متن کاملPulse radiolysis of aqueous thiocyanate solution.
The pulse radiolysis of N(2)O saturated aqueous solutions of KSCN was studied under neutral pH conditions. The observed optical absorption spectrum of the SCN(*) radical in solution is more complex than previously reported, but it is in good agreement with that measured in the gas phase. Kinetic traces at 330 and 472 nm corresponding to SCN(*) and (SCN)(2)(*-), respectively, were fit using a Mo...
متن کاملPulse Radiolysis of Tetraphenylcyclobutane in Hexamethylphosphoric Triamide Solution
r-1, c-2, t-3, t-4-tetraphenvlcyclobutane (TPCB) was irradiated in dilute solutions of hexa methylphosphoric triamide (HMPT) with 20 ns pulses of 16 MeV electrons. Solvated electrons (e^iv) produced during the radiolysis of HMPT react with TPCB with k = (6 ± 1) • 109 1/mol s. Simultaneously with the decay of the optical absorption of the solvated electrons, the formation of the absorption of t...
متن کاملSome biological interactions studied by pulse radiolysis techniques.
Complex formation betwel'n proteins and ùrug ' , mLLco-poly,;accharide;, an1l dyes, or detergent typc molecules is well documentcd in tbc litcraturc ( 1•3) and has been studied b y a varicty of methods including ultrafiltration , dialysis and metachromatic spcctrometry. In this romrnunication we attempt to show that thesl' binding procc ses can be gcnerally investigated by pulsc radiolysis whic...
متن کاملPulse radiolysis studies on superoxide reductase from Treponema pallidum.
Superoxide reductases (SORs) are small metalloenzymes, which catalyze reduction of O2*- to H2O2. The reaction of the enzyme from Treponema pallidum with superoxide was studied by pulse radiolysis methods. The first step is an extremely fast bi-molecular reaction of the ferrous center with O2, with a rate constant of 6 x 10 (8) M(-1) s(-1). A first intermediate is formed which is converted to a ...
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ژورنال
عنوان ژورنال: Nature
سال: 1968
ISSN: 0028-0836,1476-4687
DOI: 10.1038/217485c0