On the generalized concentration and molecular mass dependencies of macromolecular self-diffusion in polymer solutions

Self-diffusion experimental data obtained with the n.m.r. pulsed gradient spin-echo method in polyethylene oxide (PEO), polystyrene (PS), dextran, gelatine, cellulose triacetate (CT), poly(dimethyl siloxane) (PDMS) solutions and melts in a wide range of solvents, with molecular mass (M) and concentration (ø), were analysed to show the existence of common dependencies for Ds(M) and Ds(ø). The general law for Ds(ø) is expressed as f( ø \ ̂o) = Ds(ø) L(ø)Ds(0) and is correct for the solvent quality ranging from θ to 'good'. The existence of the generalized f( ø \ ̂o) was examined for the 17 different polymer-solvent systems. With the use of the generalized function, where Ds(O)=lim Ds \ ̂o,Ds(O)≈M-β, \ ̂≈M- 2-β 3 nearly 100 Ds(ø) dependencies were described. The renormalization function L(ø) accounts for the local dynamic properties of the concentration dependence. © 1988

Magnetic order in the Ising model with parallel dynamics

It is discussed how the equilibrium properties of the Ising model are described by an Hamiltonian with an antiferromagnetic low temperature behavior if only an heat bath dynamics, with the characteristics of a Probabilistic Cellular Automaton, is assumed to determine the temporal evolution of the system.Comment: 9 pages, 3 figure

Radiological assessment of the Belarusian nuclear power plant site in the pre-operational period

Field studies on the pre-operational period of a Belarusian NPP have allowed us to determine the “background” level of gamma-emitting radionuclides in individual components of the environment. The results of measuring the dose rate at the NPP construction site are from 0.048 to 0.089 μSv/h. External radiation in the surveyed area is at 96% due to 40K, 226Ra and 232Th. The radionuclides in the surface soil layer are: 40K - from 530 to 700 Bq/kg; 226Ra - from 30 to 55 Bq/kg; and 232Th - from 17 to 35 Bq/kg; 137Cs from 2 to 13 Bq/kg. The dose rate in the floodplain of the Viliya River from 0.033 to 0.082 μSv/h. The activity concentrations of the radionuclides in the surface soil layer of the floodplain of the Viliya River are: 40K - from 390 to 690 Bq/kg; 226Ra - from 33 to 50 Bq/kg; 232Th - from 15 to 50 Bq/kg; 137Cs - from 3 to 12 Bq/kg. The activity concentration of carbon-14 and tritium in the dominant vegetation species were determined to be: from 74.4 to 111.5 pMC and less than lower range limit, respectively. © 2020 RAD Conference Proceedings

Simultaneous measurements of water optical properties by AC9 transmissometer and ASP-15 Inherent Optical Properties meter in Lake Baikal

Measurements of optical properties in media enclosing Cherenkov neutrino telescopes are important not only at the moment of the selection of an adequate site, but also for the continuous characterization of the medium as a function of time. Over the two last decades, the Baikal collaboration has been measuring the optical properties of the deep water in Lake Baikal (Siberia) where, since April 1998, the neutrino telescope NT-200 is in operation. Measurements have been made with custom devices. The NEMO Collaboration, aiming at the construction of a km3 Cherenkov neutrino detector in the Mediterranean Sea, has developed an experimental setup for the measurement of oceanographic and optical properties of deep sea water. This setup is based on a commercial transmissometer. During a joint campaign of the two collaborations in March and April 2001, light absorption, scattering and attenuation in water have been measured. The results are compatible with previous ones reported by the Baikal Collaboration and show convincing agreement between the two experimental techniques.Comment: 16 pages, submitted to NIM-

Evaluation design of the Social Engagement Framework for Addressing the Chronic-disease-challenge (SEFAC)

Background: The Social Engagement Framework for Addressing the Chronic-disease-challenge (SEFAC) project intends to empower citizens at risk of or with type 2 diabetes (T2DM) and/or cardiovascular disease (CVD) to selfmanage their chronic conditions through the SEFAC intervention. The intervention combines the concepts of mindfulness, social engagement and information and communication technology support, in order to reduce the burden of citizens with chronic conditions and to increase the sustainability of the health system in four European countries. Methods: A prospective cohort study with a 6-month pre-post design will be conducted in four European countries: Croatia, Italy, the Netherlands and the United Kingdom. A total of 360 community-dwelling citizens ≥50 years of age will be recruited; 200 citizens at risk of T2DM and/or CVD in the next 10 years (50 participants in each country) and 160 citizens with T2DM and/or CVD (40 participants in each country). Effects of the intervention in terms of selfmanagement, healthy lifestyle behavior, social support, stress, depression, sleep and fatigue, adherence to medications and health-related quality of life will be assessed. In addition, a preliminary cost-effectiveness analysis will be performed from a societal and healthcare perspective. Discussion: The SEFAC project will further elucidate whether the SEFAC intervention is feasible and (cost-) effective among citizens at risk of and suffering from T2DM and/or CVD in different settings. Trial registration: ISRCTN registry number is ISRCTN11248135

On the generalized concentration and molecular mass dependencies of macromolecular self-diffusion in polymer solutions

Self-diffusion experimental data obtained with the n.m.r. pulsed gradient spin-echo method in polyethylene oxide (PEO), polystyrene (PS), dextran, gelatine, cellulose triacetate (CT), poly(dimethyl siloxane) (PDMS) solutions and melts in a wide range of solvents, with molecular mass (M) and concentration (ø), were analysed to show the existence of common dependencies for Ds(M) and Ds(ø). The general law for Ds(ø) is expressed as f( ø \ ̂o) = Ds(ø) L(ø)Ds(0) and is correct for the solvent quality ranging from θ to 'good'. The existence of the generalized f( ø \ ̂o) was examined for the 17 different polymer-solvent systems. With the use of the generalized function, where Ds(O)=lim Ds \ ̂o,Ds(O)≈M-β, \ ̂≈M- 2-β 3 nearly 100 Ds(ø) dependencies were described. The renormalization function L(ø) accounts for the local dynamic properties of the concentration dependence. © 1988

On the generalized concentration and molecular mass dependencies of macromolecular self-diffusion in polymer solutions

Self-diffusion experimental data obtained with the n.m.r. pulsed gradient spin-echo method in polyethylene oxide (PEO), polystyrene (PS), dextran, gelatine, cellulose triacetate (CT), poly(dimethyl siloxane) (PDMS) solutions and melts in a wide range of solvents, with molecular mass (M) and concentration (ø), were analysed to show the existence of common dependencies for Ds(M) and Ds(ø). The general law for Ds(ø) is expressed as f( ø \ ̂o) = Ds(ø) L(ø)Ds(0) and is correct for the solvent quality ranging from θ to 'good'. The existence of the generalized f( ø \ ̂o) was examined for the 17 different polymer-solvent systems. With the use of the generalized function, where Ds(O)=lim Ds \ ̂o,Ds(O)≈M-β, \ ̂≈M- 2-β 3 nearly 100 Ds(ø) dependencies were described. The renormalization function L(ø) accounts for the local dynamic properties of the concentration dependence. © 1988

On the generalized concentration and molecular mass dependencies of macromolecular self-diffusion in polymer solutions

Self-diffusion experimental data obtained with the n.m.r. pulsed gradient spin-echo method in polyethylene oxide (PEO), polystyrene (PS), dextran, gelatine, cellulose triacetate (CT), poly(dimethyl siloxane) (PDMS) solutions and melts in a wide range of solvents, with molecular mass (M) and concentration (ø), were analysed to show the existence of common dependencies for Ds(M) and Ds(ø). The general law for Ds(ø) is expressed as f( ø \ ̂o) = Ds(ø) L(ø)Ds(0) and is correct for the solvent quality ranging from θ to 'good'. The existence of the generalized f( ø \ ̂o) was examined for the 17 different polymer-solvent systems. With the use of the generalized function, where Ds(O)=lim Ds \ ̂o,Ds(O)≈M-β, \ ̂≈M- 2-β 3 nearly 100 Ds(ø) dependencies were described. The renormalization function L(ø) accounts for the local dynamic properties of the concentration dependence. © 1988

Sarkoidosis with salivary glands and trigeminus lesion

A case of sarcoidosis involving parotid and lacrimal glands and trigeminus is described