重症急性胰腺炎(SAP)是临床常见的危重急症,具有进展迅速、并发症多、死亡率高的特点。其中,急性肺损伤(ALI)是其最先出现的并发症,且是早期高死亡原因之一。目前尚无治疗本病的特效药,主要以对症支持为主,效果一般,因而亟需寻求更为有...重症急性胰腺炎(SAP)是临床常见的危重急症,具有进展迅速、并发症多、死亡率高的特点。其中,急性肺损伤(ALI)是其最先出现的并发症,且是早期高死亡原因之一。目前尚无治疗本病的特效药,主要以对症支持为主,效果一般,因而亟需寻求更为有效的治疗方法。中医药在SAP并发ALI中有其独特的治法,并且其疗效在临床及基础研究中已得到初步认定,本文通过搜索PubMed、Web of Science、中国生物医学文献服务系统(SinoMed)、中国知网全文数据库(CNKI)、中国科技期刊数据库(VIP)和万方数据库近10年的相关文献,对SAP并发ALI的中医治疗进展进行综述。展开更多
Silicon(111) and Silicon(100) were employed for fabrication of TiO 2 films by metal organic chemical vapor deposition(MOCVD). Titanium(IV) isopropoxide(Ti[O(C 3H 7) 4]) was used as a precursor. The as deposited TiO 2 ...Silicon(111) and Silicon(100) were employed for fabrication of TiO 2 films by metal organic chemical vapor deposition(MOCVD). Titanium(IV) isopropoxide(Ti[O(C 3H 7) 4]) was used as a precursor. The as deposited TiO 2 films were characterized with FE\|SEM, XRD and AFM. The photocatalytic properties were investigated by decomposition of aqueous OrangeⅡ. And UV VIS photospectrometer was used for checking the absorption characteristics and photocatalytic degradation activity. The crystalline and structural properties of TiO 2 film had crucial influences on the photodegradation efficiency. For MOCVD in situ deposited films on Si substrates, the photoactivities varied following a shape of “M': at lower(350℃), middle(500℃) and higher(800℃) temperature of deposition, relative lower photodegradation activities were observed. At 400℃ and 700℃ of deposition, relative higher efficiencies of degradation were obtained, because one predominant crystallite orientation could be obtained as deposition at the temperature of two levels, especially a single anatase crystalline TiO 2 film could be obtained at 700℃.展开更多
The phenomenon of two dilute aqueous phases composed of sodium dodecylsulfate(SDS) and cetyl trimethyl ammonium bromide(CTAB) was investigated under various conditions such as concentrations and molar ratios of the tw...The phenomenon of two dilute aqueous phases composed of sodium dodecylsulfate(SDS) and cetyl trimethyl ammonium bromide(CTAB) was investigated under various conditions such as concentrations and molar ratios of the two surfactants, the addition of sodium chloride and temperature. Vesicles formation was found in the both phases by TEM image.展开更多
The crystal structure of ([CuL(H_2O)_2](ClO_4)_2·2H_2O, CuL)(L=N-(5-sulfosalicylidene)-4′-bromoaniline) was determined by means of X-ray crystallography. The interaction between CuL and salmon sperm DNA in a 0.1...The crystal structure of ([CuL(H_2O)_2](ClO_4)_2·2H_2O, CuL)(L=N-(5-sulfosalicylidene)-4′-bromoaniline) was determined by means of X-ray crystallography. The interaction between CuL and salmon sperm DNA in a 0.1 mol/L HOAc-NaOAc buffer solution(pH 5.10) was investigated by cyclic voltammetry and UV-Vis spectroscopy. A couple of redox peaks of CuL in the cyclic voltammograms(CV) can be seen at the glassy carbon electrode. It was found that the peak current of CuL decreased significantly with a negative shift of the peak potential in the presence of DNA compared with that in the absence of DNA. In addition, the decreased absorbance of CuL was observed with increasing the concentration of DNA; the absorption spectrum of an ethidium bromide(EB)-DNA system in the presence of CuL confirms that the binding mode of CuL to DNA is different from the intercalation of EB with DNA. All the experimental results indicate that CuL can bind to DNA by electrostatic binding and form a 1∶1 association complex with a binding constant of 2.72×10 4 L/mol.展开更多
During 1991-1993,the activity levels of the bone-coal mines were investigated in Zhejiang,Hubei,Hunan,Jiangxi and Anhui Province,respectively,where the reserve of bone-coal is about 90% of our country’s total reserve...During 1991-1993,the activity levels of the bone-coal mines were investigated in Zhejiang,Hubei,Hunan,Jiangxi and Anhui Province,respectively,where the reserve of bone-coal is about 90% of our country’s total reserve.The average of γ radiation doserate level measured for bone-coal,bone-coal cinder(BCC) and bone-coal cinder brick(BCCB) in these provinces is about 500 nGy/h,400 nGy/h and 700 nGy/h respectively,while that for fields,roads and houses made of BCCB in corresponding regions of these provinces is about 200 nGy/h,260 nGy/h and 300 nGy/h respectively.It is shown that the environmental activity level of bone-coal mining area is about 3 times higher than the reference spots.展开更多
Using the renormalization group method, the critical behavior of Gaussian model is studied in external magnetic fields on X fractal lattices embedded in two-dimensional and -dimensional Euclidean spaces, respectively...Using the renormalization group method, the critical behavior of Gaussian model is studied in external magnetic fields on X fractal lattices embedded in two-dimensional and -dimensional Euclidean spaces, respectively. Critical points and exponents are calculated. It is found that there is long-range order at finite temperature for this model, and that the critical points do not change with the space dimensionality (or the fractal dimensionality ). It is also found that the critical exponents are very different from results of Ising model on the same lattices, and that the exponents on X lattices are different from the exact results on translationally symmetric lattices.展开更多
The phase diagram of the quaternary system of sodium dodecyl trioxyethylene sulfate(SDES)/n-butanol/n-octane/water was obtained at (30.0±0.1) ℃. There exists a clear, isotropic, and low-viscosity L phase, which ...The phase diagram of the quaternary system of sodium dodecyl trioxyethylene sulfate(SDES)/n-butanol/n-octane/water was obtained at (30.0±0.1) ℃. There exists a clear, isotropic, and low-viscosity L phase, which can be divided into W/O, bi-continuous(B.C.) and O/W microemulsions by conductivity measurement results. Dielectric Relaxation Spectroscopy(DRS) measurements, including permittivity, conductivity, relaxation strength, characteristic relaxation time, dielectric parameters, phase parameters, etc., were applied to investigating the microstructures of the system mentioned above. For the samples with a fixed SDES/n-butanol mass ratio of 4/6 including 20%(mass fraction) of n-octane, DRS indicated a structure transition from a W/O to an O/W via a B.C. microemulsion with the increase of the water content. For the samples with a fixed (SDES/20%n-octane)/H_2O mass ratio of 5/5, DRS presented that there only exists a onefold structure of a W/O microemulsion as the (n-butanol/20%n-octane) content increases. The results obtained from DRS are in good agreement with those from the phase diagram.展开更多
It was investigated that the radon concentrations in bone-coal mining areas,in outside and inside BCCB houses and ordinary red-brick (ORB) houses of the reference points in Hubei,Hunan,Jiangxi,Zhejiang and Anhui Provi...It was investigated that the radon concentrations in bone-coal mining areas,in outside and inside BCCB houses and ordinary red-brick (ORB) houses of the reference points in Hubei,Hunan,Jiangxi,Zhejiang and Anhui Provinces. It was shown that the average annual radon concentration inside BCCB houses in the bone-coal mining areas in the five provinces ranges from 85.7 to 303 Bq/m3,with an average of 151 Bq/m3,which is 3 times that inside ORB houses at the reference points. The average annual radon concentration outside BCCB houses in the bone-coal mining areas in the five provinces ranges from 12.0 to 73.8 Bq/m3,with an average of 34.9 Bq/m3,which is 1.5 times that outside ordinary ORB at the reference points. And the radon concentration in shafts of Hubei and Zhejiang Prov- ince is 9.51×103 Bq/m3 and 965 Bq/m3,respectively. This report also shows the changing patterns of radon concen- trations with day,season,height,etc.展开更多
From 1 August, 1981 to 31 July, 1984, the authors used epidemiological method to carry out a field retrospective investigation of 806 women who had had the Stainless Steel Ring (SSR) inserted for the first time. By th...From 1 August, 1981 to 31 July, 1984, the authors used epidemiological method to carry out a field retrospective investigation of 806 women who had had the Stainless Steel Ring (SSR) inserted for the first time. By the life table method, the one year continuation展开更多
文摘重症急性胰腺炎(SAP)是临床常见的危重急症,具有进展迅速、并发症多、死亡率高的特点。其中,急性肺损伤(ALI)是其最先出现的并发症,且是早期高死亡原因之一。目前尚无治疗本病的特效药,主要以对症支持为主,效果一般,因而亟需寻求更为有效的治疗方法。中医药在SAP并发ALI中有其独特的治法,并且其疗效在临床及基础研究中已得到初步认定,本文通过搜索PubMed、Web of Science、中国生物医学文献服务系统(SinoMed)、中国知网全文数据库(CNKI)、中国科技期刊数据库(VIP)和万方数据库近10年的相关文献,对SAP并发ALI的中医治疗进展进行综述。
文摘Silicon(111) and Silicon(100) were employed for fabrication of TiO 2 films by metal organic chemical vapor deposition(MOCVD). Titanium(IV) isopropoxide(Ti[O(C 3H 7) 4]) was used as a precursor. The as deposited TiO 2 films were characterized with FE\|SEM, XRD and AFM. The photocatalytic properties were investigated by decomposition of aqueous OrangeⅡ. And UV VIS photospectrometer was used for checking the absorption characteristics and photocatalytic degradation activity. The crystalline and structural properties of TiO 2 film had crucial influences on the photodegradation efficiency. For MOCVD in situ deposited films on Si substrates, the photoactivities varied following a shape of “M': at lower(350℃), middle(500℃) and higher(800℃) temperature of deposition, relative lower photodegradation activities were observed. At 400℃ and 700℃ of deposition, relative higher efficiencies of degradation were obtained, because one predominant crystallite orientation could be obtained as deposition at the temperature of two levels, especially a single anatase crystalline TiO 2 film could be obtained at 700℃.
文摘The phenomenon of two dilute aqueous phases composed of sodium dodecylsulfate(SDS) and cetyl trimethyl ammonium bromide(CTAB) was investigated under various conditions such as concentrations and molar ratios of the two surfactants, the addition of sodium chloride and temperature. Vesicles formation was found in the both phases by TEM image.
文摘The crystal structure of ([CuL(H_2O)_2](ClO_4)_2·2H_2O, CuL)(L=N-(5-sulfosalicylidene)-4′-bromoaniline) was determined by means of X-ray crystallography. The interaction between CuL and salmon sperm DNA in a 0.1 mol/L HOAc-NaOAc buffer solution(pH 5.10) was investigated by cyclic voltammetry and UV-Vis spectroscopy. A couple of redox peaks of CuL in the cyclic voltammograms(CV) can be seen at the glassy carbon electrode. It was found that the peak current of CuL decreased significantly with a negative shift of the peak potential in the presence of DNA compared with that in the absence of DNA. In addition, the decreased absorbance of CuL was observed with increasing the concentration of DNA; the absorption spectrum of an ethidium bromide(EB)-DNA system in the presence of CuL confirms that the binding mode of CuL to DNA is different from the intercalation of EB with DNA. All the experimental results indicate that CuL can bind to DNA by electrostatic binding and form a 1∶1 association complex with a binding constant of 2.72×10 4 L/mol.
基金Supported by State Environment Protection Bureau and Chinese Nuclear Industry Corporation (Project No.90201001)
文摘During 1991-1993,the activity levels of the bone-coal mines were investigated in Zhejiang,Hubei,Hunan,Jiangxi and Anhui Province,respectively,where the reserve of bone-coal is about 90% of our country’s total reserve.The average of γ radiation doserate level measured for bone-coal,bone-coal cinder(BCC) and bone-coal cinder brick(BCCB) in these provinces is about 500 nGy/h,400 nGy/h and 700 nGy/h respectively,while that for fields,roads and houses made of BCCB in corresponding regions of these provinces is about 200 nGy/h,260 nGy/h and 300 nGy/h respectively.It is shown that the environmental activity level of bone-coal mining area is about 3 times higher than the reference spots.
文摘Using the renormalization group method, the critical behavior of Gaussian model is studied in external magnetic fields on X fractal lattices embedded in two-dimensional and -dimensional Euclidean spaces, respectively. Critical points and exponents are calculated. It is found that there is long-range order at finite temperature for this model, and that the critical points do not change with the space dimensionality (or the fractal dimensionality ). It is also found that the critical exponents are very different from results of Ising model on the same lattices, and that the exponents on X lattices are different from the exact results on translationally symmetric lattices.
文摘The phase diagram of the quaternary system of sodium dodecyl trioxyethylene sulfate(SDES)/n-butanol/n-octane/water was obtained at (30.0±0.1) ℃. There exists a clear, isotropic, and low-viscosity L phase, which can be divided into W/O, bi-continuous(B.C.) and O/W microemulsions by conductivity measurement results. Dielectric Relaxation Spectroscopy(DRS) measurements, including permittivity, conductivity, relaxation strength, characteristic relaxation time, dielectric parameters, phase parameters, etc., were applied to investigating the microstructures of the system mentioned above. For the samples with a fixed SDES/n-butanol mass ratio of 4/6 including 20%(mass fraction) of n-octane, DRS indicated a structure transition from a W/O to an O/W via a B.C. microemulsion with the increase of the water content. For the samples with a fixed (SDES/20%n-octane)/H_2O mass ratio of 5/5, DRS presented that there only exists a onefold structure of a W/O microemulsion as the (n-butanol/20%n-octane) content increases. The results obtained from DRS are in good agreement with those from the phase diagram.
基金Supported by State Environment Protection Bureau and Chinese Nuclear Industry Corporation (Project No.90201001)
文摘It was investigated that the radon concentrations in bone-coal mining areas,in outside and inside BCCB houses and ordinary red-brick (ORB) houses of the reference points in Hubei,Hunan,Jiangxi,Zhejiang and Anhui Provinces. It was shown that the average annual radon concentration inside BCCB houses in the bone-coal mining areas in the five provinces ranges from 85.7 to 303 Bq/m3,with an average of 151 Bq/m3,which is 3 times that inside ORB houses at the reference points. The average annual radon concentration outside BCCB houses in the bone-coal mining areas in the five provinces ranges from 12.0 to 73.8 Bq/m3,with an average of 34.9 Bq/m3,which is 1.5 times that outside ordinary ORB at the reference points. And the radon concentration in shafts of Hubei and Zhejiang Prov- ince is 9.51×103 Bq/m3 and 965 Bq/m3,respectively. This report also shows the changing patterns of radon concen- trations with day,season,height,etc.
文摘From 1 August, 1981 to 31 July, 1984, the authors used epidemiological method to carry out a field retrospective investigation of 806 women who had had the Stainless Steel Ring (SSR) inserted for the first time. By the life table method, the one year continuation
