[en] A new heat supplying system is proposed that utilizes the exhausted gas of the boiler to substitute the extraction steam from the turbine as the driving force for the adsorption heat pump regarding the recovery of the condensation heat of power plant. However, our system is not subject to the low efficiency of wasted heat utilization due to the low temperature of flue gas, which hence possesses higher performance in COP factors in the utilization of heat than that of the conventional techniques of using flues gas, so the amount of extracted gas from turbine can be reduced and the power generate rate be enhanced. Subsequently, detailed evaluation of the performance of this system in the point of views of thermodynamics and economics are presented in this work. For the instance of a 330 MW heat supply unit, 5 sample cities are chosen to demonstrate and confirm our economic analysis. It is revealed that when the heating coefficient of the heat pump is 1.8, the investment payback periods for these 5 cities are within the range of 2.4 to 4.8 years, which are far below the service year of the heat pump, demonstrating remarkable economic benefits for our system. (paper)

[en] A quantitative criterion is proposed for testing the rationality of an effective QCD baryon theory. The higher order corrections of the standard SU(3) Skyrme model to the Gell-Mann-Okubo relations for baryons are studied according to the criterion, and some interesting results are presented. A possible prescription is recommended

[en] We describe the successful synthesis of Fe₂(dobdc) (dobdc⁴⁻=2, 5-dioxido-1, 4-benzenedicarboxylate), which has an open metal coordination site Fe(II), and investigate the adsorption properties of three important molecules CO₂, CH₄ and N₂ on Fe₂(dobdc) and an oxidized analog, Fe₂(O₂)(dobdc). We found that CO₂ adsorption isotherm of Fe₂(dobdc) at 10 bar was very different from Fe₂(O₂)(dobdc), with the capacities of 144.5 cm³ g⁻¹ and 98.1 cm³ g⁻¹, respectively. The adsorption capacities for CH₄ were 75.8 cm³ g⁻¹ and 36.8 cm³ g⁻¹, respectively, at 10 bar in these materials. Using ideal adsorbed solution theory (IAST), we obtain the adsorption selectivity for CO₂ using equimolar mixtures of CO₂/CH₄ and CO₂/N₂ with Fe₂(dobdc) and Fe₂(O₂)(dobdc) as a function of pressure. Fe₂(dobdc) has a higher, more stable separation factor. - Graphical abstract: The selectivity of CO₂/CH₄ mixture (50%/50%) on Fe₂(dobdc) and Fe₂(O₂)(dobdc). - Highlights: • We explored the contrastive adsorption of CO₂, CH₄, and N₂ in Fe₂(dobdc) and Fe₂(O₂)(dobdc) for the first time. • Through IAST, we obtain the adsorption selectivity for CO₂ from the equimolar mixture of CO₂/CH₄ and CO₂/N₂ for Fe₂(dobdc) and Fe₂(O₂)(dobdc). • We determined that the open coordination site of Fe(II) is the main reason for different adsorption performances

[en] Three metal–organic frameworks (MOFs), [Cu(INA)_2], [Cu(INA)_2I_2] and [Cu(INA)_2(H_2O)_2(NH_3)_2], were synthesized with 3D, 2D, and 0D structures, respectively. Reversible flexible structural changes of these MOFs were reported. Through high temperature (60–100 °C) stimulation of I_2 or ambient temperature stimulation of NH_3, [Cu(INA)_2] (3D) converted to [Cu(INA)_2I_2] (2D) and [Cu(INA)_2(H_2O)_2(NH_3)_2] (0D); as the temperature increased to 150 °C, the MOFs changed back to their original form. In this way, this 3D MOF has potential application in the capture of I_2 and NH_3 from polluted water and air. XRD, TGA, SEM, NH_3-TPD, and the measurement of gas adsorption were used to describe the changes in processes regarding the structure, morphology, and properties. - Graphical abstract: Through I_2, NH_3 molecules and thermal stimulation, the three MOFs can achieve reversible flexible structural changes. Different methods were used to prove the flexible reversible changes. - Highlights: • [Cu(INA)_2] can flexible transform to [Cu(INA)_2I_2] and [Cu(INA)_2(H_2O)_2(NH_3)_2] by adsorbing I_2 or NH_3. • The reversible flexible transformation related to material source, temperature and concentration. • Potential applications for the capture of I_2 and NH_3 from polluted water or air

[en] Highlights: •A sol-gel method for synthesis of Fe-doping Ni₂P nanocatalysts was present. •Fe-doping Ni₂P sample exhibited high OER activity after electrochemical activation. •In situ formed Fe-NiOOH layer on activated Fe-Ni₂P provided more active OER sites. -- Abstract: In this work, we reported a facile and safe route for synthesis of Ni₂P nanocatalysts by sol-gel method and demonstrated that the oxygen evolution reaction (OER) activity of Ni₂P nanocatalysts can be dramatically enhanced by iron-doping and electrochemical activation. Compared with the fresh Fe-doped Ni₂P nanocatalysts, a stable Fe-NiOOH layer was formed on the surface of Fe-doped Ni₂P nanoparticles by electrochemical activation, thus promoting the charge transfer ability and surface electrochemically active sites generation for the electrochemical activated Fe-doped Ni₂P nanocatalysts, ultimately accounting for the improvement of water oxidation activity, which was evidenced by cyclic voltammograms (CV), electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectra (XPS) as well as high-resolution transmission electron microscopy (HR-TEM) measurements. For water oxidation reaction in 1 M KOH solution, the electrochemical activated Fe-doped Ni₂P nanocatalysts can attain 10 mA/cm² at an overpotential of 292 mV with Tafel slope of 50 mV/dec, which was also much better than that of individual Ni₂P, Fe₂P nanocatalysts as well as commercial RuO₂ electrocatalyst. Moreover, long-term stability performance by chronoamperometric and chronopotentiometric tests for the activated Fe-doped Ni₂P nanocatalysts exhibited no obvious decline within 56 h. It was demonstrated that modulating the OER catalytic activity for metal phosphide by iron-doping and electrochemical activation may provide new opportunities and avenues to engineer high performance electrocatalysts for water splitting.

[en] The plasma proteins in dogs irradiated with 2.65, 3.75, 5 and 10 Gy of γ-rays were analysed by isoelectrofocusing. Two groups of proteins, which the author named acute phase reactive proteins (A₁ pI = 4.3, A₂ pI = 4.8), were increased during the acute phase of disease. The levels of these proteins were found to be relative to the ultimate fate of the dogs. The causes of the changes of these proteins are discussed

[en] The Li₂Mg₃TiO₆ (LMT)-x wt% CaF₂ (x = 2, 4, 6, 8) ceramics were prepared by a conventional solid-state route. The effects of CaF₂ addition on the sinterability, phase constitution, microstructure and microwave dielectric properties of LMT ceramics were investigated systematically. The results showed that CaF₂ lowers the sintering temperature of LMT ceramics from 1280 to 900 °C and broadens their sintering range of LMT ceramics owing to the formation of LiF as a liquid sintering agent. Formation of CaTiO₃ tuned the temperature coefficient of resonant frequency (τ_f) of LMT from − 39 to 1.5 ppm/°C. The LMT ceramics doped with 6 wt% CaF₂ sintered at 1200 °C possess excellent microwave dielectric properties: ε_r = 17.2, Q × f = 76,800 GHz, and τ_f = 1.5 ppm/°C.

[en] Jiang et al (2004 J. Phys.: Condens. Matter 16 521) present a model based on the traditional broken-bond model for predicting surface energies of elemental crystals. It is found that bias errors can be produced in calculating the coordination numbers of surface atoms, especially in the prediction of high-Miller-index surface energies. (comment)

[en] An algorithm have been presented to retrieve sea and land surface temperature from NOAA satellite radiative measurements. We used the atmospheric radiation in the adjacent sea area to correct the atmosphere in the land and sea area. Because the self-consistency atmospheric radiant information is adopted at the same time and condition, this method has important actual efficiency. Simultaneity, several atmosphere patterns are selected by using atmosphere MODTRAN radiative transfer model program, the different retrieval algorithms are contrasted. The results show that practical effect is good, correct and feasible. (paper)

[en] The comparative study between the electronic structures of α-Pu and δ-Pu was conducted by a plane wave pseudo-potential method within the framework of density functional theory. It's learned from the charge population that the 8 kinds of atoms in α-Pu have different charge distributions, and the gain and loss of net charge are mainly contributed by s and p electrons, while the atoms in δ-Pu have the same charge distribution with no gain or loss of net charge. It's learned from density of states (DOS) that α-Pu has relatively lower and wilder DOS peak than δ-Pu, indicating that the average bond energy of α-Pu is stronger than that of δ-Pu, which results in a more difficult plastic deformation for α-Pu. Besides, the energy of α-Pu electrons is generally lower than that of δ-Pu electrons, which is an important reason for the better stability of α-Pu at room temperature. And it's learned from partial density of states (PDOS) that, the correlation of 5f electrons of Pu atom at site 8 is the strongest, with the greatest contribution to the spin moment of α-Pu, while at site 1 it is the weakest, with the smallest contribution to the spin moment. It's learned from the electron density that the atoms in δ-Pu have round electron clouds without obvious interaction, presenting the typical feature of metallic bonds, while the electron clouds of atoms in α-Pu overlap with each other and the bonds are covalent in character, which to some degree reveals the mechanism of different ductility and brittleness of δ-Pu and α-Pu. (authors)