We report a low-noise, high-signal-to-noise-ratio(SNR) balanced homodyne detector based on the standard transimpedance amplifier circuit and the inductance and capacitance combination for the measurement of the bright...We report a low-noise, high-signal-to-noise-ratio(SNR) balanced homodyne detector based on the standard transimpedance amplifier circuit and the inductance and capacitance combination for the measurement of the bright squeezed state in the range from 1 kHz to 100 kHz. A capacitance is mounted at the input end of the AC branch to prevent the DC photocurrent from entering the AC branch and avoid AC branch saturation. By adding a switch at the DC branch,the DC branch can be flexibly turned on and off on different occasions. When the switch is on, the DC output provides a monitor signal for laser beam alignment. When the switch is off, the electronic noise of the AC branch is greatly reduced at audio-frequency band due to immunity to the impedance of the DC branch, hence the SNR of the AC branch is significantly improved. As a result, the electronic noise of the AC branch is close to -125 dBm, and the maximum SNR of the AC branch is 48 dB with the incident power of 8 mW in the range from 1 kHz to 100 kHz. The developed photodetector paves a path for measuring the bright squeezed state at audio-frequency band.展开更多
Objective:To prepare the liposomes of mangrove oil,Optimization of the formulation of mangrove oil liposomes by Box Behnken response surface methodology.Methods:Preparation of Rhododendron oil liposomes by ethanol inj...Objective:To prepare the liposomes of mangrove oil,Optimization of the formulation of mangrove oil liposomes by Box Behnken response surface methodology.Methods:Preparation of Rhododendron oil liposomes by ethanol injection probe ultrasound,Determination of gemacrone by HPLC.The ratio of lecithin to cholesterol(X1),drug lipid ratio(X2)and phospholipid concentration(X3)were used as independent variables,and encapsulation efficiency(Y)was used as dependent variable,the formulation was optimized by Box Behnken response surface method,and the entrapment efficiency was predicted.The entrapment efficiency,particle size,polydispersity index(PDI),Zeta potential and drug loading of the optimized liposomes were evaluated.Results:The optimal prescription and preparation of Folium Rhododendri Daurici oil liposome was confirmed as follows:X1=7.28:1、X2=11.34:1、X3=9.32mg·mL-1,the encapsulation efficiency was(82.55±1.66)%,the particle size was(130.531±46)nm,the polydispersity index was 0.185±05,Zeta potential was(21.970±36)mV,the drug loading was(5.941±0.12)%.Conclusion:The Box Behnken response surface method is accurate to obtain the optimal formulation of mangrove oil liposomes,it has high precision and good prediction effect.And the preparation process of mangrove oil liposomes is stable and feasible.展开更多
Objective To explore the clinical therapeutic effect on premature ovarian failure(POF)treated with the combination of mild moxibustion and western medication.Methods A total of 66 patients were divided into a control ...Objective To explore the clinical therapeutic effect on premature ovarian failure(POF)treated with the combination of mild moxibustion and western medication.Methods A total of 66 patients were divided into a control group and an observation group according to random number table,33 cases in each one.In the control group,the conventional western medication was administered.In the observation group,besides the treatment as the control group,mild moxibustion was supplemented at Guānyuán(关元CV4),Qìhăi(气海CV6),Píshū(脾俞BL20)(bilateral)and Shènshū(肾俞BL23)(bilateral).The duration of treatment was 3 menstrual cycles in either group.Before treatment and on the 9th day of menstruation after 3-menstrual cycle treatment,the number of antral follicles and ovarian volume were detected by color Doppler ultrasound respectively.Before treatment and on day 2 to 4 of menstruation after 3-menstrual cycle treatment,the levels of serum estrogen(E_(2)),follicle-stimulating hormone(FSH),interleukin-21(IL-21)and vascular endothelial growth factor(VEGF)were determined separately and the therapeutic effect was evaluated in two groups separately.Results The effective rate was 93.94%in the observation group and was 72.73%in the control group(P<0.05).After treatment,the number of antral follicles and ovarian volume were increased as compared with those before treatment in the patients of two groups(both P<0.05).After treatment,the number of antral follicles and ovarian volume in the observation group were higher than the control group(both P<0.05).After treatment,the levels of serum E_(2) and FSH were improved as compared with those before treatment in the two groups(both P<0.05).The levels of serum E_(2) and FSH in the observation group were better than the control group after treatment(both P<0.05).The levels of serum IL-21 and VEGF after treatment did not change obviously as compared with those before treatment in the control group(both P>0.05).But in the observation group,the levels of serum IL-21 and VEGF after treatment changed apparently as compared with those before treatment(both P<0.05)and the levels of these two indicators after treatment were better than the control group(both P<0.05).Conclusion The combined treatment of mild moxibustion with western medication achieves the definite therapeutic effect on POF and it increases the number of antral follicles and ovarian volume and regulates sex hormone level,which is probably related to the regulation of serum IL-21 and VEGF.展开更多
To the Editor:Data from the Global Observatory on Donation and Transplantation (GODT) indicate that of the 126,670 solid organs reported to be transplanted in 2015, kidneys made up 66% of these organs.
In the electromagnetic induction-controlled automated steel teeming(EICAST)technology of ladle,the height and location of the blocking layer are critical factors to determine the structure size and installation locati...In the electromagnetic induction-controlled automated steel teeming(EICAST)technology of ladle,the height and location of the blocking layer are critical factors to determine the structure size and installation location of induction coil.And,they are also the key parameters affecting the successful implementation of this new technology.In this paper,the influence of the liquid steel temperature,the holding time and the alloy composition on the height and location of the blocking layer were studied by numerical simulation.The simulation results were verified by 40 t ladle industrial experiments.Moreover,the regulation approach of the blocking layer was determined,and the determination process of coil size and its installation location were also analyzed.The results show that the location of the blocking layer moves down with the increase in the liquid steel temperature and the holding time.The height of the blocking layer decreases with the increase in the liquid steel temperature;however,it increases with the increase in the holding time.The height and location of the blocking layer can be largely adjusted by changing the alloy composition of filling particles in the upper nozzle.When the liquid steel temperature is 1550℃,the holding time is 180 min and the alloy composition is confirmed,the melting layer height is 120 mm,and the blocking layer height is 129 mm,which are beneficial to design and installation of induction coil.These results are very important for the industrial implementation of the EICAST technology.展开更多
The Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy samples were synthesized by melt-spinning technique at the different wheel velocity （cooling rate）, and the structure and electrochenfical hydrogen storage properties were investig...The Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy samples were synthesized by melt-spinning technique at the different wheel velocity （cooling rate）, and the structure and electrochenfical hydrogen storage properties were investigated. The result indicated that the structure of the melt-spun ribbons mainly contains C14 Laves phase and V-based solid solution phase. The discharge capacity, cyclic stability, high-rate discharge ability and electrochemical kinetic of the alloy electrodes are correlated with the cooling rate （wheel velocity）, and the maximum discharge capacity is over 200 mA.h/g at the wheel velocity of 20 m/s.展开更多
基金Project(51504299)supported by the National Science Found for Young Scientists of ChinaProject(2012GS430101)supported by the National Science and Technology Program for Public Wellbeing,China
基金Project(2014FJ1011)supported by Key Project of Science and Technology of Hunan Province,ChinaProject(201509050)supported by Program for Special Scientific Research Projects of National Public Welfare Industry
基金Projects(51304251,51504299)supported by the National Natural Science Foundation of ChinaProject(201509050)+1 种基金supported by Special Program on Environmental Protection for Public Welfare,ChinaProject(k1502037-31)supported by Key Project of Changsha,China
基金Projects(51304251,51504299)supported by the National Natural Science Foundation of ChinaProject(201509050)supported by Special Program on Environmental Protection for Public Welfare,China
基金financially supported by the National Science Fund for Excellent Young Scholars of China(No.52022111)the National Key Research and Development Program of China(Nos.2017YFC0210401,2018YFC1900306)+1 种基金the Distinguished Young Scholars of China(No.51825403)the National Natural Science Foundation of China(Nos.51634010,51974379).
基金Project(51634010)supported by the Key Project of National Natural Science Foundation of ChinaProject(51304251)supported by the National Natural Science Foundation of ChinaProject(201509050)supported by Special Program on Environmental Protection for Public Welfare of China
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11654002,61575114,11874250,and 11804207)the National Key Research and Development Program of China(Grant No.2016YFA0301401)+3 种基金the Program for Sanjin Scholar of Shanxi Province,Chinathe Program for Outstanding Innovative Teams of Higher Learning Institutions of Shanxi,Chinathe Fund for Shanxi“1331 Project”Key Subjects Construction,ChinaKey Research and Development Projects of Shanxi Province,China(Grant No.201903D111001)。
文摘We report a low-noise, high-signal-to-noise-ratio(SNR) balanced homodyne detector based on the standard transimpedance amplifier circuit and the inductance and capacitance combination for the measurement of the bright squeezed state in the range from 1 kHz to 100 kHz. A capacitance is mounted at the input end of the AC branch to prevent the DC photocurrent from entering the AC branch and avoid AC branch saturation. By adding a switch at the DC branch,the DC branch can be flexibly turned on and off on different occasions. When the switch is on, the DC output provides a monitor signal for laser beam alignment. When the switch is off, the electronic noise of the AC branch is greatly reduced at audio-frequency band due to immunity to the impedance of the DC branch, hence the SNR of the AC branch is significantly improved. As a result, the electronic noise of the AC branch is close to -125 dBm, and the maximum SNR of the AC branch is 48 dB with the incident power of 8 mW in the range from 1 kHz to 100 kHz. The developed photodetector paves a path for measuring the bright squeezed state at audio-frequency band.
基金financially supported by the National Science Fund for Excellent Young Scholars of China (No. 52022111)the Distinguished Young Scholars of China (No. 51825403)the National Natural Science Foundation of China (Nos. 51634010, 51974379)。
基金financially supported by the National Natural Science Foundation of China(Nos.51904355,51825403)the National Key R&D Program of China(No.2020YFC1909201)。
基金Heilongjiang Province North Medicine and Functional Food Characteristic Discipline Construction Project(No.2018-TSXK-02)Heilongjiang Provincial Department of Education Project(No.12511574)。
文摘Objective:To prepare the liposomes of mangrove oil,Optimization of the formulation of mangrove oil liposomes by Box Behnken response surface methodology.Methods:Preparation of Rhododendron oil liposomes by ethanol injection probe ultrasound,Determination of gemacrone by HPLC.The ratio of lecithin to cholesterol(X1),drug lipid ratio(X2)and phospholipid concentration(X3)were used as independent variables,and encapsulation efficiency(Y)was used as dependent variable,the formulation was optimized by Box Behnken response surface method,and the entrapment efficiency was predicted.The entrapment efficiency,particle size,polydispersity index(PDI),Zeta potential and drug loading of the optimized liposomes were evaluated.Results:The optimal prescription and preparation of Folium Rhododendri Daurici oil liposome was confirmed as follows:X1=7.28:1、X2=11.34:1、X3=9.32mg·mL-1,the encapsulation efficiency was(82.55±1.66)%,the particle size was(130.531±46)nm,the polydispersity index was 0.185±05,Zeta potential was(21.970±36)mV,the drug loading was(5.941±0.12)%.Conclusion:The Box Behnken response surface method is accurate to obtain the optimal formulation of mangrove oil liposomes,it has high precision and good prediction effect.And the preparation process of mangrove oil liposomes is stable and feasible.
文摘Objective To explore the clinical therapeutic effect on premature ovarian failure(POF)treated with the combination of mild moxibustion and western medication.Methods A total of 66 patients were divided into a control group and an observation group according to random number table,33 cases in each one.In the control group,the conventional western medication was administered.In the observation group,besides the treatment as the control group,mild moxibustion was supplemented at Guānyuán(关元CV4),Qìhăi(气海CV6),Píshū(脾俞BL20)(bilateral)and Shènshū(肾俞BL23)(bilateral).The duration of treatment was 3 menstrual cycles in either group.Before treatment and on the 9th day of menstruation after 3-menstrual cycle treatment,the number of antral follicles and ovarian volume were detected by color Doppler ultrasound respectively.Before treatment and on day 2 to 4 of menstruation after 3-menstrual cycle treatment,the levels of serum estrogen(E_(2)),follicle-stimulating hormone(FSH),interleukin-21(IL-21)and vascular endothelial growth factor(VEGF)were determined separately and the therapeutic effect was evaluated in two groups separately.Results The effective rate was 93.94%in the observation group and was 72.73%in the control group(P<0.05).After treatment,the number of antral follicles and ovarian volume were increased as compared with those before treatment in the patients of two groups(both P<0.05).After treatment,the number of antral follicles and ovarian volume in the observation group were higher than the control group(both P<0.05).After treatment,the levels of serum E_(2) and FSH were improved as compared with those before treatment in the two groups(both P<0.05).The levels of serum E_(2) and FSH in the observation group were better than the control group after treatment(both P<0.05).The levels of serum IL-21 and VEGF after treatment did not change obviously as compared with those before treatment in the control group(both P>0.05).But in the observation group,the levels of serum IL-21 and VEGF after treatment changed apparently as compared with those before treatment(both P<0.05)and the levels of these two indicators after treatment were better than the control group(both P<0.05).Conclusion The combined treatment of mild moxibustion with western medication achieves the definite therapeutic effect on POF and it increases the number of antral follicles and ovarian volume and regulates sex hormone level,which is probably related to the regulation of serum IL-21 and VEGF.
文摘To the Editor:Data from the Global Observatory on Donation and Transplantation (GODT) indicate that of the 126,670 solid organs reported to be transplanted in 2015, kidneys made up 66% of these organs.
基金financially supported by the National Natural Science Foundation of China(Grant No.U1560207)the Liaoning Innovative Research Team in University(Grant No.LT2017011)
文摘In the electromagnetic induction-controlled automated steel teeming(EICAST)technology of ladle,the height and location of the blocking layer are critical factors to determine the structure size and installation location of induction coil.And,they are also the key parameters affecting the successful implementation of this new technology.In this paper,the influence of the liquid steel temperature,the holding time and the alloy composition on the height and location of the blocking layer were studied by numerical simulation.The simulation results were verified by 40 t ladle industrial experiments.Moreover,the regulation approach of the blocking layer was determined,and the determination process of coil size and its installation location were also analyzed.The results show that the location of the blocking layer moves down with the increase in the liquid steel temperature and the holding time.The height of the blocking layer decreases with the increase in the liquid steel temperature;however,it increases with the increase in the holding time.The height and location of the blocking layer can be largely adjusted by changing the alloy composition of filling particles in the upper nozzle.When the liquid steel temperature is 1550℃,the holding time is 180 min and the alloy composition is confirmed,the melting layer height is 120 mm,and the blocking layer height is 129 mm,which are beneficial to design and installation of induction coil.These results are very important for the industrial implementation of the EICAST technology.
基金Acknowledgements This work was supported by the Key Laboratory of Preparation and Applications of Environmental Friendly Materials （Ministry of Education） and the Foundation for Innovative Research Groups of the National Natural Science Foundation of China （Grant No. 20921002）.
文摘The Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy samples were synthesized by melt-spinning technique at the different wheel velocity （cooling rate）, and the structure and electrochenfical hydrogen storage properties were investigated. The result indicated that the structure of the melt-spun ribbons mainly contains C14 Laves phase and V-based solid solution phase. The discharge capacity, cyclic stability, high-rate discharge ability and electrochemical kinetic of the alloy electrodes are correlated with the cooling rate （wheel velocity）, and the maximum discharge capacity is over 200 mA.h/g at the wheel velocity of 20 m/s.
