Experiments for single and bisolute competitive adsorption were carried out to investigate the adsorption behavior of β-naphthalenesulfonic acid(NSA) and sulfuric acid (H_2SO_4) from their solution at 25℃ onto weakl...Experiments for single and bisolute competitive adsorption were carried out to investigate the adsorption behavior of β-naphthalenesulfonic acid(NSA) and sulfuric acid (H_2SO_4) from their solution at 25℃ onto weakly basic resin D301R. Adsorption affinity of sulfuric acid on D301R was found to be much higher than that of NSA. The data of single-solute adsorption were fitted to the Langmuir model and the Freundlich adsorption model. The ideal adsorbed solution theory(IAST) coupled with the single-solute adsorption models were used to predict the bisolute competitive adsorption equilibria. The IAST coupled with the Langmuir and the Freundlich model for sulfuric acid and NSA, respectively, yields the favorable representation of the bisolute competitive adsorption behavior.展开更多
Five kinds of 45# steel samples with concave features on the surface were manufactured using Laser Texturing Technology (LTT). Optimum design theory was used to design the experiment, and a two-level orthogonal table-...Five kinds of 45# steel samples with concave features on the surface were manufactured using Laser Texturing Technology (LTT). Optimum design theory was used to design the experiment, and a two-level orthogonal table-L 16 (2 15 ) design was adopted . Micro-wear and micro-friction experienced by samples with concave surface features and samples with smooth surfaces were compared experimentally. The wear resistance of samples with concave surface features was increased most, and different surface morphologies had different effects on friction and wear properties.展开更多
TPP-Ⅰ(tripeptidyl peptidase-Ⅰ) protein turnover was studied by observing the role of rat TPP-Ⅰ in neuromedin B(NMB) and other neuropeptides degradations in some physiological situations. The mixtures of rat TPP-Ⅰ ...TPP-Ⅰ(tripeptidyl peptidase-Ⅰ) protein turnover was studied by observing the role of rat TPP-Ⅰ in neuromedin B(NMB) and other neuropeptides degradations in some physiological situations. The mixtures of rat TPP-Ⅰ with each of NMB, other neuropeptides and Ala-Ala-Phe-MCA were made respectively under the same conditions. The reaction was observed at different timeand monitored by means of high performance liquid chromatography(HPLC) and time-of-flight mass spectrometry(TOF-MS) in vitro. NMB was broken down at the same degree as Ala-Ala-Phe-MCA by rat TPP-Ⅰ and Gly-Asn-Leu was released within 16 h, but other neuropeptides were not digested within 24 h. TPP-Ⅰ is the predominant proteolytic enzyme responsible for the intracellular degradation of neuromedin B. NMB has recently been found to be a good natural substrate for rat lysosomal TPP-Ⅰ.展开更多
The optoelectronic telescope has two sets of control systems: azimuth one and elevation one, and both are driven by PWM power amplifier with high efficiency and wide speed regulation range. The diagram of the azimuth ...The optoelectronic telescope has two sets of control systems: azimuth one and elevation one, and both are driven by PWM power amplifier with high efficiency and wide speed regulation range. The diagram of the azimuth control system is demonstrated, the nonlinear factors is analyzed at low speed, and some related experiments are carried out. The results show that the positioning error with unipolar is 86 codes(106.21″), while 18 codes (22.23″) is with bipolar PWM driver.展开更多
This paper briefly introduces the collection and recognition of bio-medical sig nals, designs the method to collect FM signals. A detailed discussion on the sys tem hardware, structure and functions is also given. Und...This paper briefly introduces the collection and recognition of bio-medical sig nals, designs the method to collect FM signals. A detailed discussion on the sys tem hardware, structure and functions is also given. Under LabWindows/CVI,the ha rdware and the driver do compatible, the hardware equipment work properly active ly. The paper adopts multi threading technology for real-time analysis and make s use of latency time of CPU effectively, expedites program reflect speed, impro ve s the program to perform efficiency. One threading is collecting data; the other threading is analyzing data. Using the method, it is broaden to analyze the sig nal in real-time. Wavelet transform to remove the main interference in the FM a nd by adding time-window to recognize with BP network; Finally the results of c ollecting signals and BP networks are discussed.8 pregnant women’s signals of F M were collected successfully by using the sensor. The correct of BP network rec ognition is about 83.3% by using the above measure.展开更多
Filling velocity and thickness of soft layer are major factors affecting subgrade stability according to an example study by means of finite element stress method(FESM). A case is studied and shows that the subgrade w...Filling velocity and thickness of soft layer are major factors affecting subgrade stability according to an example study by means of finite element stress method(FESM). A case is studied and shows that the subgrade was slided because of excessive filling velocity. To determine a reasonable filling velocity is a key problem to a subgrade with marine soft soil.展开更多
文摘Experiments for single and bisolute competitive adsorption were carried out to investigate the adsorption behavior of β-naphthalenesulfonic acid(NSA) and sulfuric acid (H_2SO_4) from their solution at 25℃ onto weakly basic resin D301R. Adsorption affinity of sulfuric acid on D301R was found to be much higher than that of NSA. The data of single-solute adsorption were fitted to the Langmuir model and the Freundlich adsorption model. The ideal adsorbed solution theory(IAST) coupled with the single-solute adsorption models were used to predict the bisolute competitive adsorption equilibria. The IAST coupled with the Langmuir and the Freundlich model for sulfuric acid and NSA, respectively, yields the favorable representation of the bisolute competitive adsorption behavior.
基金The authors are grateful for the financial support provided by the National High Technology Research and Development Program of China(863 Program)(No.2002AA331180)Trans-Century Training Program Foundation for the Talents by the Chinese Ministry of Education(No.20030720)+1 种基金the Foundation for Distin-guished Young Scholars of Jilin Province(Grant No.20040104)the Natural Science Foundation of Jilin Province(No.2002628-2).
文摘Five kinds of 45# steel samples with concave features on the surface were manufactured using Laser Texturing Technology (LTT). Optimum design theory was used to design the experiment, and a two-level orthogonal table-L 16 (2 15 ) design was adopted . Micro-wear and micro-friction experienced by samples with concave surface features and samples with smooth surfaces were compared experimentally. The wear resistance of samples with concave surface features was increased most, and different surface morphologies had different effects on friction and wear properties.
文摘TPP-Ⅰ(tripeptidyl peptidase-Ⅰ) protein turnover was studied by observing the role of rat TPP-Ⅰ in neuromedin B(NMB) and other neuropeptides degradations in some physiological situations. The mixtures of rat TPP-Ⅰ with each of NMB, other neuropeptides and Ala-Ala-Phe-MCA were made respectively under the same conditions. The reaction was observed at different timeand monitored by means of high performance liquid chromatography(HPLC) and time-of-flight mass spectrometry(TOF-MS) in vitro. NMB was broken down at the same degree as Ala-Ala-Phe-MCA by rat TPP-Ⅰ and Gly-Asn-Leu was released within 16 h, but other neuropeptides were not digested within 24 h. TPP-Ⅰ is the predominant proteolytic enzyme responsible for the intracellular degradation of neuromedin B. NMB has recently been found to be a good natural substrate for rat lysosomal TPP-Ⅰ.
基金Natural Science Foundation from Science & Technology Department of Jilin Province(HJ2003013)
文摘The optoelectronic telescope has two sets of control systems: azimuth one and elevation one, and both are driven by PWM power amplifier with high efficiency and wide speed regulation range. The diagram of the azimuth control system is demonstrated, the nonlinear factors is analyzed at low speed, and some related experiments are carried out. The results show that the positioning error with unipolar is 86 codes(106.21″), while 18 codes (22.23″) is with bipolar PWM driver.
文摘This paper briefly introduces the collection and recognition of bio-medical sig nals, designs the method to collect FM signals. A detailed discussion on the sys tem hardware, structure and functions is also given. Under LabWindows/CVI,the ha rdware and the driver do compatible, the hardware equipment work properly active ly. The paper adopts multi threading technology for real-time analysis and make s use of latency time of CPU effectively, expedites program reflect speed, impro ve s the program to perform efficiency. One threading is collecting data; the other threading is analyzing data. Using the method, it is broaden to analyze the sig nal in real-time. Wavelet transform to remove the main interference in the FM a nd by adding time-window to recognize with BP network; Finally the results of c ollecting signals and BP networks are discussed.8 pregnant women’s signals of F M were collected successfully by using the sensor. The correct of BP network rec ognition is about 83.3% by using the above measure.
基金Supported by Foundation of Innovation Project of Jilin University
文摘Filling velocity and thickness of soft layer are major factors affecting subgrade stability according to an example study by means of finite element stress method(FESM). A case is studied and shows that the subgrade was slided because of excessive filling velocity. To determine a reasonable filling velocity is a key problem to a subgrade with marine soft soil.
