Initiation factor-3 has been photochemically cross-linked to Escherichia coli 30 S ribosomal subunits by means of near-ultraviolet (> 285 nm) irradiation. The cross-linking was judged to be specific since noncovalent binding was required for subsequent cross-linking and was prevented by the presence of 0.5 M NH4Cl or 0.5 mM aurintricarboxylic acid. Covalent attachment reached its maximum level ...

We consider an open one dimensional lattice gas on sites i = 1, . . . , N , with particles jumping independently with rate 1 to neighboring interior empty sites, the simple symmetric exclusion process. The particle fluxes at the left and right boundaries, corresponding to exchanges with reservoirs at different chemical potentials, create a stationary nonequilibrium state (SNS) with a steady flu...

The mitochondrial respiratory activities and energy metabolism in the fetal rat brain were measured at the end of 30 minutes of intrauterine ischemia and after 2 and 4 hours of recirculation. The transient ischemia was associated with a delayed deterioration of cellular bioenergetic state and mitochondrial activities. The deterioration was not prevented by a free radical scavenger, 3-methyl-1-p...

Exposure to ultraviolet (UV) radiation may cause the significant degradation of many materials. UV radiation causes photooxidative degradation which results in breaking of the polymer chains, produces free radical and reduces the molecular weight, causing deterioration of mechanical properties and leading to useless materials, after an unpredictable time. Polystyrene (PS), one of the most impor...

Free radical or oxidative injury may be a fundamental mechanism underlying a number of human neurologic diseases. Therapy using free radical scavengers (antioxidants) has the potential to prevent, delay, or ameliorate many neurologic disorders. However, the biochemistry of oxidative pathobiology is complex, and optimum antioxidant therapeutic options may vary and need to be tailored to individu...

We analyze the quark mass and flavour dependence of the QCD phase transition temperature. When the lightest pseudo-scalar meson mass (m PS) is larger than 2 GeV the critical temperature is controlled by the gluonic sector of QCD alone. For smaller values of the lightest meson mass the pseudo-critical temperature decreases slowly with m PS. For a large regime of meson masses the pseudo-critical ...

AIM To study the antioxidant activity, UV absorption, concentration and stability of ascorbic acid (AA) in porcine and bovine aqueous humour (AH). METHODS Porcine and bovine AH was taken within 5 min after death and frozen at -70 degrees C. The characteristic UV absorption band of AA and the concentration of AA in AH was determined by UV spectrophotometry. The antioxidant activity of AA to se...

The rhizobitoxine analog, L-2-amino-4-(2-aminoethoxy)-trans-3-butenoic acid (Ro), which effectively inhibits ethylene production in apple (Malus domestica Borkh.) and other tissues at concentrations at about 68 micromolar, inhibited ethylene production by about 50 to 70% in green tomato (Lycopersicon esculentum Mill.) fruit slices but only by about 15% in pink and ripe tomato tissue slices. Eth...

The lattice Boltzmann method (LBM) emerged from the field of computational fluid dynamics as an alternative to Navier-Stokes based approaches. It has since been proven to be applicable also for the simulation of free surface flows (liquid-gas flow) and particulate flows (liquid-solid flow). In the past both algorithmss for free surface flows and particulate flows have been realized that preserv...

Economic freedom is known to have a profound effect on the efficient allocation of resources. Without subsidies, tariffs, and other government interventions, economic activity operates in the most efficient manner because of competitive pressures to produce more with fewer inputs. This means that energy use per unit of production is decreased with the presence of free markets (Graph 2). Free ma...