Blood purification refers to the extra corporeal therapies of removing potentially toxic substances, in which blood is circulated through an adsorption system loading separation materials. High-efficient inexpensive s...Blood purification refers to the extra corporeal therapies of removing potentially toxic substances, in which blood is circulated through an adsorption system loading separation materials. High-efficient inexpensive separation materials are critical to success. In this review, separation materials such as polymers and nanomaterials are summarized and compared. Combining the advantages of the adsorptive membranes and nanomaterials, organic–inorganic hybrid/blend membranes have been developed explosively. These hybrid/blend membranes have both the characteristics of high permeability, easy fabrication, good biocompatibility of adsorptive membranes, and characteristics of fast adsorption rate and high adsorption capacity of nanomaterials. The preparation and modification methodology of the separation materials is reviewed. For affinity separation materials, the relationship of ligand chemistry, ligand density and pores of the matrix is discussed. This paper also summarizes some interesting applications in separation materials for removal of bilirubin, endotoxin, toxic metal ions, cytokine, etc.展开更多
Computer simulation was carried out on fiber length and width for plantation-grown Chinesewhite poplar (Populus tomentosa Carr. clone) and plantation-grown poplar I-72 (P. x eurumericana (Dode)Guiner cv.). Skewness an...Computer simulation was carried out on fiber length and width for plantation-grown Chinesewhite poplar (Populus tomentosa Carr. clone) and plantation-grown poplar I-72 (P. x eurumericana (Dode)Guiner cv.). Skewness and kurtosis of measured results exhibited that distributions of the fiber length andwidth departured from normal distribution. Three-parameter Weibull density function was used in thisinvestigation and the corresponding program was written with Turbo C. The results showed that profiles ofsimulated length and width histograms were similar to ones of measured histograms, and that there was apretty good agreement between simulated and measured means of fiber length and width. There was a littleinfluence on the simulated means from seed used in random number generator and number of simulatedvariables. That indicated that the simulation was steady when the seed and the number were altered. Differenthistograms can be obtained with different values of the location, the shape, and the scale parameter correspondingto different values of the minimum, the mean, and the standard deviation for fiber length and width. Thesimulation presented here can be used as a tool for the studies on the variations in fiber morphology.展开更多
We study the phase transition between the pion condensed phase and normal phase,as well as chiral phase transition in a two flavor(Nf=2)IR-improved soft-wall AdS/QCD model at finite isospin chemical potentialμI and t...We study the phase transition between the pion condensed phase and normal phase,as well as chiral phase transition in a two flavor(Nf=2)IR-improved soft-wall AdS/QCD model at finite isospin chemical potentialμI and temperature T.By self-consistently solving the equations of motion,we obtain the phase diagram in the plane ofμI and T.The pion condensation appears together with a massless Nambu-Goldstone boson mπ1(Tc,μcI)=0,which is very likely to be a second-order phase transition with mean-field critical exponents in the smallμI region.When T=0,the critical isospin chemical potential approximates to vacuum pion massμcI≈m0.The pion condensed phase exists in an arched area,and the boundary of the chiral crossover intersects the pion condensed phase at a tri-critical point.Qualitatively,the results are in good agreement with previous studies on lattice simulations and model calculations.展开更多
A security architecture using secret key algorithm and vertical authentication mode is proposed. Establish security protocols in the chip of smart key at network client or mobile phone, and establish key exchange prot...A security architecture using secret key algorithm and vertical authentication mode is proposed. Establish security protocols in the chip of smart key at network client or mobile phone, and establish key exchange protocol in the chip of encryption cards at network key management center. A combined key real-time generation algorithm is used to solve the update and management problems. Online or offline authentication and documents encryption transmission protocols are adopted to achieve credible connection between users. Accordingly, set up security layer over Internet, which provides convenient encryption ability to each network user, and build credible and secure network system.展开更多
目的比较分析结肠癌患者行改良中间入路腹腔镜根治性右半结肠切除术(laparoscopic right hemicolectomy,LRHC)与经传统中间入路LRHC近期的疗效。方法选择2014年3月至2018年3月广州市中医医院普外科实施LRHC治疗的结肠癌患者84例,应用随...目的比较分析结肠癌患者行改良中间入路腹腔镜根治性右半结肠切除术(laparoscopic right hemicolectomy,LRHC)与经传统中间入路LRHC近期的疗效。方法选择2014年3月至2018年3月广州市中医医院普外科实施LRHC治疗的结肠癌患者84例,应用随机数字表法分为两组,其中对照组采用传统中间入路,改良组采用以胰头前区域为中心进行改良的中间入路,每组各42例。对两组手术情况及相关并发症进行统计学分析比较。结果与对照组比较,改良组术中出血量[(39.5±11.6)ml与(86.3±13.7)ml,t=11.124,P<0.05]显著下降、手术时间[(104.5±20.5)min与(139.3±25.9)min,t=6.094,P<0.05]明显缩短、术中血管损伤率[7.1%(3/42)与23.8%(10/42),χ^2=7.406,P<0.05]亦明显下降;而在中转开腹、淋巴结清扫数、术后并发症、住院时间、术后标本质量等方面两组比较差异均无统计学意义(P均>0.05)。结论结肠癌患者行改良中间入路LRHC,不仅使术中出血量减少、手术时间缩短,还明显降低术中血管损伤率。展开更多
基金Supported by the National Natural Science Foundation of China(No.21606120)National Undergraducate Training Program for Innovation and Entrepreneurship(Nos.201710148000016 and 201810148080)
文摘Blood purification refers to the extra corporeal therapies of removing potentially toxic substances, in which blood is circulated through an adsorption system loading separation materials. High-efficient inexpensive separation materials are critical to success. In this review, separation materials such as polymers and nanomaterials are summarized and compared. Combining the advantages of the adsorptive membranes and nanomaterials, organic–inorganic hybrid/blend membranes have been developed explosively. These hybrid/blend membranes have both the characteristics of high permeability, easy fabrication, good biocompatibility of adsorptive membranes, and characteristics of fast adsorption rate and high adsorption capacity of nanomaterials. The preparation and modification methodology of the separation materials is reviewed. For affinity separation materials, the relationship of ligand chemistry, ligand density and pores of the matrix is discussed. This paper also summarizes some interesting applications in separation materials for removal of bilirubin, endotoxin, toxic metal ions, cytokine, etc.
文摘Computer simulation was carried out on fiber length and width for plantation-grown Chinesewhite poplar (Populus tomentosa Carr. clone) and plantation-grown poplar I-72 (P. x eurumericana (Dode)Guiner cv.). Skewness and kurtosis of measured results exhibited that distributions of the fiber length andwidth departured from normal distribution. Three-parameter Weibull density function was used in thisinvestigation and the corresponding program was written with Turbo C. The results showed that profiles ofsimulated length and width histograms were similar to ones of measured histograms, and that there was apretty good agreement between simulated and measured means of fiber length and width. There was a littleinfluence on the simulated means from seed used in random number generator and number of simulatedvariables. That indicated that the simulation was steady when the seed and the number were altered. Differenthistograms can be obtained with different values of the location, the shape, and the scale parameter correspondingto different values of the minimum, the mean, and the standard deviation for fiber length and width. Thesimulation presented here can be used as a tool for the studies on the variations in fiber morphology.
基金Supported by the National Natural Science Foundation of China(11405074)Supported by the National Natural Science Foundation of China(11805084)+1 种基金the PhD Start-up Fund of Natural Science Foundation of Guangdong Province(2018030310457)Guangdong Pearl River Talents Plan(2017GC010480)。
文摘We study the phase transition between the pion condensed phase and normal phase,as well as chiral phase transition in a two flavor(Nf=2)IR-improved soft-wall AdS/QCD model at finite isospin chemical potentialμI and temperature T.By self-consistently solving the equations of motion,we obtain the phase diagram in the plane ofμI and T.The pion condensation appears together with a massless Nambu-Goldstone boson mπ1(Tc,μcI)=0,which is very likely to be a second-order phase transition with mean-field critical exponents in the smallμI region.When T=0,the critical isospin chemical potential approximates to vacuum pion massμcI≈m0.The pion condensed phase exists in an arched area,and the boundary of the chiral crossover intersects the pion condensed phase at a tri-critical point.Qualitatively,the results are in good agreement with previous studies on lattice simulations and model calculations.
文摘A security architecture using secret key algorithm and vertical authentication mode is proposed. Establish security protocols in the chip of smart key at network client or mobile phone, and establish key exchange protocol in the chip of encryption cards at network key management center. A combined key real-time generation algorithm is used to solve the update and management problems. Online or offline authentication and documents encryption transmission protocols are adopted to achieve credible connection between users. Accordingly, set up security layer over Internet, which provides convenient encryption ability to each network user, and build credible and secure network system.
文摘目的比较分析结肠癌患者行改良中间入路腹腔镜根治性右半结肠切除术(laparoscopic right hemicolectomy,LRHC)与经传统中间入路LRHC近期的疗效。方法选择2014年3月至2018年3月广州市中医医院普外科实施LRHC治疗的结肠癌患者84例,应用随机数字表法分为两组,其中对照组采用传统中间入路,改良组采用以胰头前区域为中心进行改良的中间入路,每组各42例。对两组手术情况及相关并发症进行统计学分析比较。结果与对照组比较,改良组术中出血量[(39.5±11.6)ml与(86.3±13.7)ml,t=11.124,P<0.05]显著下降、手术时间[(104.5±20.5)min与(139.3±25.9)min,t=6.094,P<0.05]明显缩短、术中血管损伤率[7.1%(3/42)与23.8%(10/42),χ^2=7.406,P<0.05]亦明显下降;而在中转开腹、淋巴结清扫数、术后并发症、住院时间、术后标本质量等方面两组比较差异均无统计学意义(P均>0.05)。结论结肠癌患者行改良中间入路LRHC,不仅使术中出血量减少、手术时间缩短,还明显降低术中血管损伤率。
