In this paper we study the local measure of approximation of a class of special mathematical expectation operators to Lipschitz class of functions by probabilistic method. The some well known operators (e. g., the Ber...In this paper we study the local measure of approximation of a class of special mathematical expectation operators to Lipschitz class of functions by probabilistic method. The some well known operators (e. g., the Bernstein, Bascakov and Szasz-Mirakjan operators etc) are special cases of a class of the mathematical expetation operators.展开更多
＇Xiarihong＇ is a new early-ripening variety selected from seedlings of Chinese dwarf cherry （Cerasus humilis Bunge） in 2006. The fruits are oblate and have red skin; the flesh is yellow, sour and sweet. The averag...＇Xiarihong＇ is a new early-ripening variety selected from seedlings of Chinese dwarf cherry （Cerasus humilis Bunge） in 2006. The fruits are oblate and have red skin; the flesh is yellow, sour and sweet. The average mass of a fruit is 6.74 g, and a fruit has a half freestone. The content of soluble solids reaches 10.9%, and total sugar and total acid content are 8.20% and 1.81% respectively, so the ratio of total sugar content to total acid content is 4.53; the edible rate is up to 94.51%. In the flesh, calcium, iron, zinc, and vitamin C content are 219.7, 4.4, 1.09, and 182 mg/kg respectively. Fruits ripen in late July in Beijing, and the development period of fruits is 96-101 d. Fruits can be kept for 3-5 d at room temperature, about 20 d in cold storage, and one year under freezing conditions. It can be cultivated in Beijing, flowers and fruits in the next year, with strong yielding ability.展开更多
A transverse Ising spin system, in the presence of time-dependent longitudinal field, is studied by the effective-field theory （EFT）. The effective-field equations of motion of the average magnetization are given fo...A transverse Ising spin system, in the presence of time-dependent longitudinal field, is studied by the effective-field theory （EFT）. The effective-field equations of motion of the average magnetization are given for the simple cubic lattice （Z ---- 6） and the honeycomb lattice （Z = 3）. The Liapunov exponent A is calculated for discussing the stability of the magnetization and it is used to determine the phase boundary. The dynamic phase transition diagrams in ho/ZJ - F/ZJ plane and in ho/ZJ - T/ZJ plane have been drawn, and there is no dynamical tricritical point on the dynamic phase transition boundary. The effect of the thermal fluctuations upon the dynamic phase boundary has been discussed.展开更多
In a time where surface active agents are capable of reducing the energy of the bonds between water molecules by interacting with them to reduce surface tension, it would be unwise not to be able to generate these in ...In a time where surface active agents are capable of reducing the energy of the bonds between water molecules by interacting with them to reduce surface tension, it would be unwise not to be able to generate these in masses. Different Pseudomonas species were grown in MSP （minimal sulphate phosphate） media containing salts, glycerol and glucose. P. aeruginosa grown aerobically in the presence of glycerol as carbon source showed the highest emulsion percentage （81.48%）, most significant decrease in surface tension （20 mN/m） and rhamnose production of 2.86 mg/mL. However, in anaerobic conditions there was no emulsion, rhamnolipid production or decrease in surface tension. The rhamnolipids were molecularly characterized using ESI-MS （electrospray ionization-mass spectrometry）, P. aeruginosa CVCM 411 is able to produce mono-rhamnolipids and di-rhamnolipids, being rhamnolipid RhC10C12.1 the predominant monomer. The specific growth rate for isolates ofP. aeruginosa and P.fluorescens in MSP are 0.6732 ht and 0.2181 h^-1, respectively. In conclusion, the formation of rhamnolipids by P. aeruginosa is linked to its growth （depending on μ）, and its ability to generate about 35% of the μmax in the presence of glucose （carbon source） and glycerol （applied as pulses）.展开更多
[Objective] The aims were to construct a new suicide plasmid of Lactobacillus and gene deletion engineering bacteria of Lactobacillus with pUC19 vector. [Methods] pUC19-CM was constructed by inserting a chloramphenico...[Objective] The aims were to construct a new suicide plasmid of Lactobacillus and gene deletion engineering bacteria of Lactobacillus with pUC19 vector. [Methods] pUC19-CM was constructed by inserting a chloramphenicol resistant gene into the multi-cloning site of pUC19,and then two homologous fragments were cloned into each side of the pUC19-CM to construct suicide plasmid pUC19-CM-D. [Results] A replacement mutant strain,whose target gene was replaced by resistant gene,could be obtained by transforming the suicide plasmid pUC19-CM-D into Lactobacillus for resistance screening. [Conclusion] The construction and application of pUC19-CM-D provided a fast and efficient means of construction of gene deletion engineering bacteria of Lactobacillus,and laid a foundation for study of gene function of Lactobacillus.展开更多
文摘In this paper we study the local measure of approximation of a class of special mathematical expectation operators to Lipschitz class of functions by probabilistic method. The some well known operators (e. g., the Bernstein, Bascakov and Szasz-Mirakjan operators etc) are special cases of a class of the mathematical expetation operators.
基金Supported by Special Project for groundwork of the Ministry of Science and Technology(2013FY111700-2)~~
文摘＇Xiarihong＇ is a new early-ripening variety selected from seedlings of Chinese dwarf cherry （Cerasus humilis Bunge） in 2006. The fruits are oblate and have red skin; the flesh is yellow, sour and sweet. The average mass of a fruit is 6.74 g, and a fruit has a half freestone. The content of soluble solids reaches 10.9%, and total sugar and total acid content are 8.20% and 1.81% respectively, so the ratio of total sugar content to total acid content is 4.53; the edible rate is up to 94.51%. In the flesh, calcium, iron, zinc, and vitamin C content are 219.7, 4.4, 1.09, and 182 mg/kg respectively. Fruits ripen in late July in Beijing, and the development period of fruits is 96-101 d. Fruits can be kept for 3-5 d at room temperature, about 20 d in cold storage, and one year under freezing conditions. It can be cultivated in Beijing, flowers and fruits in the next year, with strong yielding ability.
文摘A transverse Ising spin system, in the presence of time-dependent longitudinal field, is studied by the effective-field theory （EFT）. The effective-field equations of motion of the average magnetization are given for the simple cubic lattice （Z ---- 6） and the honeycomb lattice （Z = 3）. The Liapunov exponent A is calculated for discussing the stability of the magnetization and it is used to determine the phase boundary. The dynamic phase transition diagrams in ho/ZJ - F/ZJ plane and in ho/ZJ - T/ZJ plane have been drawn, and there is no dynamical tricritical point on the dynamic phase transition boundary. The effect of the thermal fluctuations upon the dynamic phase boundary has been discussed.
文摘In a time where surface active agents are capable of reducing the energy of the bonds between water molecules by interacting with them to reduce surface tension, it would be unwise not to be able to generate these in masses. Different Pseudomonas species were grown in MSP （minimal sulphate phosphate） media containing salts, glycerol and glucose. P. aeruginosa grown aerobically in the presence of glycerol as carbon source showed the highest emulsion percentage （81.48%）, most significant decrease in surface tension （20 mN/m） and rhamnose production of 2.86 mg/mL. However, in anaerobic conditions there was no emulsion, rhamnolipid production or decrease in surface tension. The rhamnolipids were molecularly characterized using ESI-MS （electrospray ionization-mass spectrometry）, P. aeruginosa CVCM 411 is able to produce mono-rhamnolipids and di-rhamnolipids, being rhamnolipid RhC10C12.1 the predominant monomer. The specific growth rate for isolates ofP. aeruginosa and P.fluorescens in MSP are 0.6732 ht and 0.2181 h^-1, respectively. In conclusion, the formation of rhamnolipids by P. aeruginosa is linked to its growth （depending on μ）, and its ability to generate about 35% of the μmax in the presence of glucose （carbon source） and glycerol （applied as pulses）.
基金Supported by National Science &Technology Pillar Program in the Eleventh Five-year Plan Period (2007BAD75B06)Guangxi Sci-ence Foundation (0782003-4)~~
文摘[Objective] The aims were to construct a new suicide plasmid of Lactobacillus and gene deletion engineering bacteria of Lactobacillus with pUC19 vector. [Methods] pUC19-CM was constructed by inserting a chloramphenicol resistant gene into the multi-cloning site of pUC19,and then two homologous fragments were cloned into each side of the pUC19-CM to construct suicide plasmid pUC19-CM-D. [Results] A replacement mutant strain,whose target gene was replaced by resistant gene,could be obtained by transforming the suicide plasmid pUC19-CM-D into Lactobacillus for resistance screening. [Conclusion] The construction and application of pUC19-CM-D provided a fast and efficient means of construction of gene deletion engineering bacteria of Lactobacillus,and laid a foundation for study of gene function of Lactobacillus.
