Three kinds of commercial activated carbons, such as Norit RB1, Monolith and Chemviron activated carbons, were used as adsorbents for adsorption of dibenzofuran. The average pore size and specific surface area of thes...Three kinds of commercial activated carbons, such as Norit RB1, Monolith and Chemviron activated carbons, were used as adsorbents for adsorption of dibenzofuran. The average pore size and specific surface area of these activated carbons were measured. Temperature Programmed Desorption (TPD) experiments were conducted to measure the TPD curves of dibenzofuran on the activated carbons, and then the activation energy for desorption of dibenzofuran on the activated carbons was estimated. The results showed that the Chemviron and the Norit RB1 activated carbon maintained higher specific surface area and larger micropore pore volume in comparison with the Monolith activated carbon, and the activation energy for the desorption of dibenzofuran on these two activated carbons was higher than that on the Monolith activated carbon. The smaller the pore of the activated carbon was, the higher the activated energy of dibenzofuran desorption was.展开更多
Porcine colostrum was separated into the acid soluble fraction (SF) and casein fraction (CF) by acidifying followed by centrifuge. SF was further separated by liquid chromatography and anisotropic membrane filtration...Porcine colostrum was separated into the acid soluble fraction (SF) and casein fraction (CF) by acidifying followed by centrifuge. SF was further separated by liquid chromatography and anisotropic membrane filtration. Capacities of the SF or CF of porcine colostrum, to inhibit trypsin and chymotrypsin activity and to inhibit the epidermal growth factor (EGF) degradation in pig small intestinal contents, were determined under different heat treatments. The study showed that trypsin inhibitors in porcine colostrum survived heat treatments of 100℃ water bath for up to 10 min, but exposure to boiling water bath for 30 min significantly decreased the inhibitory activity. Compared with the trypsin inhibitors, the chymotrypsin inhibitors were more heat sensitive. SF was more heat sensitive than CF. Separation of the SF of porcine colostrum by liquid chromatography and anisotropic membrane filtration revealed that the porcine colostrum protease inhibitors, those had the capacity to inhibit the trypsin chymotrypsin activity and enhanced the stability of EGF in the gastrointestinal(GI) lumen of weaned pigs, existed mainly in SF, milk derived, were a group of heat labile small proteins with molecular weight of 10 00050 000.展开更多
Porcine colostrum and milk were separated into the acid-soluble fraction(SF)and casein fraction(CF)by centrifuge. Trypsin and chymotrypsin inhibitory capacity in porcine colostrum, milk and their components were deter...Porcine colostrum and milk were separated into the acid-soluble fraction(SF)and casein fraction(CF)by centrifuge. Trypsin and chymotrypsin inhibitory capacity in porcine colostrum, milk and their components were determined by incubating bovine trypsin or chymotrypsin in a medium. The inhibition of insulin-like growth factor I(IGF-I)and epidermal growth factor(EGF)degradation in pig small intestinal contents by porcine colostrum was measured by incubating iodinated IGF-I or EGF. Degradation of labeled IGF-I or EGF was determined by monitoring the generation of radioactivity soluble in 30% trichloroacetic acid(TCA). The results showed that porcine colostrum had high levels of trypsin and chymotrypsin inhibitory activity and increased the stability of IGF-I and EGF in pig intestinal contents. The SF was higher in inhibitory potency than CF. The present study revealed that the protease inhibitors in porcine colostrum, milk-derived and colostrum-specific, existed mainly in SF.展开更多
By using a criterion for asymptotic stability in Banach space BC, a group of sufficient condi-tioas for a dynamical model with infinite delay which is derived from hematology were obtained, which refined the result in...By using a criterion for asymptotic stability in Banach space BC, a group of sufficient condi-tioas for a dynamical model with infinite delay which is derived from hematology were obtained, which refined the result in the reference [ 10] got by the second author herself.展开更多
According to the Wide Area Network model and queue dynamics in the router, the authors formulate the Internet flow control as a constrained convex programming problem, where the objective is to maximize the total util...According to the Wide Area Network model and queue dynamics in the router, the authors formulate the Internet flow control as a constrained convex programming problem, where the objective is to maximize the total utility and minimize transmission delay and delay jitter of all sources over their transmission rates. Based on this formulation, flow control can be solved by means of a gradient projection algorithm with properly rate iterations. The main difficulty facing the realization of the iteration algorithm is the distributed computation of the congestion measure. Fortunately, Explicit Congestion Notification (ECN) is likely to be used to improving the performance of TCP in the near future. By using ECN, it is possible to realize the iteration algorithm in IP networks. The algorithm is divided into two parts, algorithms in the router and the source. The main advantage of the scheme is its fast convergence ability and robustness, but small queue length fluctuation is unavoidable when the number of users increases.展开更多
Objective: in order to improve the straw returning measures, improve the returning quality and ensure the grain yield. Methods: based on years of practice, four treatments were set up to compare the effects of wheat h...Objective: in order to improve the straw returning measures, improve the returning quality and ensure the grain yield. Methods: based on years of practice, four treatments were set up to compare the effects of wheat harvesting machinery and pre-sowing operation on emergence rate, plant height and yield. Results: it was found that the harvesting machinery had a great impact on the growth and yield of maize. Under the condition of consistent operation before sowing, the emergence rate of maize with Yangma harvester increased by 8.8% and 13.5% as compared with that with Rivo harvester, and the maize yield increased by 197,143 kg. Conclusion: improving straw returning measures (including the selection of agricultural machinery) is an important method to improve the quality of straw returning, reduce the input of chemical fertilizers, and improve the quality and efficiency of crops.展开更多
Objective: to analyze the value and detection rate of dynamic video electroencephalogram in epilepsy monitoring. Methods: the study was carried out from November 2019 to October 2021. Seventy patients with epilepsy ad...Objective: to analyze the value and detection rate of dynamic video electroencephalogram in epilepsy monitoring. Methods: the study was carried out from November 2019 to October 2021. Seventy patients with epilepsy admitted to our hospital were included in the study. All patients were examined by routine electroencephalogram and dynamic video electroencephalogram, and the results were comprehensively evaluated. Results: clinical seizures and abnormal discharges were detected in 31.4% and 98.6% of the patients in the observation group and 5.7% and 55.7% of the patients in the control group. The detection rates of clinical seizures and abnormal discharges in the observation group were higher than those in the control group (P < 0.05). The detection rate of mild seizure in the observation group was lower than that in the control group, and the positive detection rate of moderate seizure, severe seizure and epilepsy in the observation group was higher than that in the control group (P < 0.05). Dynamic video-electroencephalogram confirmed that the epileptic seizure types were facial tonic-clonic seizure, absence seizure, myoclonic seizure, tonic seizure and dystonic seizure, accounting for 28.6%, 21.4%, 15.7%, 21.4% and 12.9% respectively;In the examination of the onset position of epilepsy by dynamic video-electroencephalogram, 40 cases of onset position were detected, and the others were not clear. 8 cases were found in frontal region, 13 cases in temporal region, 10 cases in temporal frontal region, 5 cases in occipital-temporal posterior region and 4 cases in frontal center. Conclusion: compared with routine ECG, the detection rate of dynamic video electroencephalogram is higher in epilepsy detection. It can also clarify the type and initial location of epileptic seizures and the severity of epilepsy, which can provide a basis for clinical diagnosis and treatment of the disease.展开更多
The sustainable development of Chinas social economy, the heating pipe network project has also had a great development. At present, the society gives positive encouragement and advocacy to the sustainable development...The sustainable development of Chinas social economy, the heating pipe network project has also had a great development. At present, the society gives positive encouragement and advocacy to the sustainable development of the project, and takes energy conservation and emission reduction as a very important task at present. Environmental protection has also become the primary factor of project construction. Central heating has been gradually adopted by construction workers in the heat network, mainly because central heating can greatly reduce the cost of the project. But if there is a problem in a node in the heat network, it will lead to a large area of the heat network without heating phenomenon. Therefore, due to the complex pipe network, the quality danger of heating pipe network is easy to occur in the construction process. Strengthening the construction technology is an important basis to ensure the quality.展开更多
Objective: to study the degree to which children with severe viral encephalitis can obtain rehabilitation nursing services during admission treatment, and to study the clinical value of rehabilitation nursing. Methods...Objective: to study the degree to which children with severe viral encephalitis can obtain rehabilitation nursing services during admission treatment, and to study the clinical value of rehabilitation nursing. Methods: choose in February 2019 to February 2022 three years into our treatment of severe viral encephalitis children as a research sample, into the scope of the children randomly processing, part of children into the control group to accept routine nursing services, the other part into the observation group of rehabilitation care services, collect children under the influence of two different nursing services, evaluate rehabilitation nursing services, the actual effect of application in children with severe viral encephalitis. Results: children receiving rehabilitation care were significantly different from the usual care services in terms of symptom improvement time and motor function score (P < 0.05), and the collected data were statistically significant. Conclusion: children with severe viral encephalitis limbs, consciousness, nerve aspects is affected by the serious, daily life and activities, clinical application of rehabilitation care, rehabilitation nursing services can be used in improving clinical symptoms and improve children movement function score plays an important role, so it is worth promoting in clinical practice.展开更多
In the process of continuously improving the level of urbanization construction, the level of urban economic development is increasing, which also provides more opportunities for the development of the construction in...In the process of continuously improving the level of urbanization construction, the level of urban economic development is increasing, which also provides more opportunities for the development of the construction industry. Facing the increasingly serious contradiction between people and land, the construction of construction projects needs to develop towards high-rise buildings. In high-rise buildings, elevators can provide many conveniences for peoples lives. The safety and stability of their operation will be closely related to the safety of peoples lives and properties. Therefore, it is necessary to do a good job in the research of elevator braking in order to comprehensively improve the stability of elevator operation. In the following paragraphs, the principle of elevator brake is firstly discussed, then the reasons of elevator brake failure are analyzed, then the main requirements of elevator brake work are studied, and finally the inspection measures of elevator brake failure are comprehensively analyzed for reference.展开更多
Objective: to analyze the related factors of death in emergency trauma patients and the treatment measures, and to provide effective reference for clinical diagnosis and treatment. Methods: 100 cases of trauma patient...Objective: to analyze the related factors of death in emergency trauma patients and the treatment measures, and to provide effective reference for clinical diagnosis and treatment. Methods: 100 cases of trauma patients admitted to our emergency surgery department from 2015 to 2018 were selected for this retrospective analysis, focusing on discussing and analyzing the causes of death cases. Results: among the patients with different causes of injury, the death rate from falling from height was the highest, reaching 85.71%, followed by traffic accidents, with the death rate of 42.86%. Heavy blows, knife wounds and other causes were 40.00%, 20.00% and 20.00% respectively. In terms of the causes of death, craniocerebral injury, traumatic hemorrhagic shock and traumatic asphyxia accounted for 51.85%, 25.93% and 22.22% respectively. Conclusion: in the process of emergency surgical trauma patients' treatment, targeted prevention and treatment must be carried out for the high incidence of death causes, and pre-hospital and in-hospital first aid capabilities must be strengthened, so as to ensure the scientific treatment plan and reduce the mortality rate as far as possible.展开更多
基金National Natural Science Foundation of China (No. 20176012) PRA project (E01-01) the Natural Science Foundation of Guangdong Province
文摘Three kinds of commercial activated carbons, such as Norit RB1, Monolith and Chemviron activated carbons, were used as adsorbents for adsorption of dibenzofuran. The average pore size and specific surface area of these activated carbons were measured. Temperature Programmed Desorption (TPD) experiments were conducted to measure the TPD curves of dibenzofuran on the activated carbons, and then the activation energy for desorption of dibenzofuran on the activated carbons was estimated. The results showed that the Chemviron and the Norit RB1 activated carbon maintained higher specific surface area and larger micropore pore volume in comparison with the Monolith activated carbon, and the activation energy for the desorption of dibenzofuran on these two activated carbons was higher than that on the Monolith activated carbon. The smaller the pore of the activated carbon was, the higher the activated energy of dibenzofuran desorption was.
文摘Porcine colostrum was separated into the acid soluble fraction (SF) and casein fraction (CF) by acidifying followed by centrifuge. SF was further separated by liquid chromatography and anisotropic membrane filtration. Capacities of the SF or CF of porcine colostrum, to inhibit trypsin and chymotrypsin activity and to inhibit the epidermal growth factor (EGF) degradation in pig small intestinal contents, were determined under different heat treatments. The study showed that trypsin inhibitors in porcine colostrum survived heat treatments of 100℃ water bath for up to 10 min, but exposure to boiling water bath for 30 min significantly decreased the inhibitory activity. Compared with the trypsin inhibitors, the chymotrypsin inhibitors were more heat sensitive. SF was more heat sensitive than CF. Separation of the SF of porcine colostrum by liquid chromatography and anisotropic membrane filtration revealed that the porcine colostrum protease inhibitors, those had the capacity to inhibit the trypsin chymotrypsin activity and enhanced the stability of EGF in the gastrointestinal(GI) lumen of weaned pigs, existed mainly in SF, milk derived, were a group of heat labile small proteins with molecular weight of 10 00050 000.
文摘Porcine colostrum and milk were separated into the acid-soluble fraction(SF)and casein fraction(CF)by centrifuge. Trypsin and chymotrypsin inhibitory capacity in porcine colostrum, milk and their components were determined by incubating bovine trypsin or chymotrypsin in a medium. The inhibition of insulin-like growth factor I(IGF-I)and epidermal growth factor(EGF)degradation in pig small intestinal contents by porcine colostrum was measured by incubating iodinated IGF-I or EGF. Degradation of labeled IGF-I or EGF was determined by monitoring the generation of radioactivity soluble in 30% trichloroacetic acid(TCA). The results showed that porcine colostrum had high levels of trypsin and chymotrypsin inhibitory activity and increased the stability of IGF-I and EGF in pig intestinal contents. The SF was higher in inhibitory potency than CF. The present study revealed that the protease inhibitors in porcine colostrum, milk-derived and colostrum-specific, existed mainly in SF.
基金Supported by the Natural Science Foundation of Guangdong Province(011471)Supported by the Education Bureau(0120)
文摘By using a criterion for asymptotic stability in Banach space BC, a group of sufficient condi-tioas for a dynamical model with infinite delay which is derived from hematology were obtained, which refined the result in the reference [ 10] got by the second author herself.
文摘According to the Wide Area Network model and queue dynamics in the router, the authors formulate the Internet flow control as a constrained convex programming problem, where the objective is to maximize the total utility and minimize transmission delay and delay jitter of all sources over their transmission rates. Based on this formulation, flow control can be solved by means of a gradient projection algorithm with properly rate iterations. The main difficulty facing the realization of the iteration algorithm is the distributed computation of the congestion measure. Fortunately, Explicit Congestion Notification (ECN) is likely to be used to improving the performance of TCP in the near future. By using ECN, it is possible to realize the iteration algorithm in IP networks. The algorithm is divided into two parts, algorithms in the router and the source. The main advantage of the scheme is its fast convergence ability and robustness, but small queue length fluctuation is unavoidable when the number of users increases.
文摘Objective: in order to improve the straw returning measures, improve the returning quality and ensure the grain yield. Methods: based on years of practice, four treatments were set up to compare the effects of wheat harvesting machinery and pre-sowing operation on emergence rate, plant height and yield. Results: it was found that the harvesting machinery had a great impact on the growth and yield of maize. Under the condition of consistent operation before sowing, the emergence rate of maize with Yangma harvester increased by 8.8% and 13.5% as compared with that with Rivo harvester, and the maize yield increased by 197,143 kg. Conclusion: improving straw returning measures (including the selection of agricultural machinery) is an important method to improve the quality of straw returning, reduce the input of chemical fertilizers, and improve the quality and efficiency of crops.
文摘Objective: to analyze the value and detection rate of dynamic video electroencephalogram in epilepsy monitoring. Methods: the study was carried out from November 2019 to October 2021. Seventy patients with epilepsy admitted to our hospital were included in the study. All patients were examined by routine electroencephalogram and dynamic video electroencephalogram, and the results were comprehensively evaluated. Results: clinical seizures and abnormal discharges were detected in 31.4% and 98.6% of the patients in the observation group and 5.7% and 55.7% of the patients in the control group. The detection rates of clinical seizures and abnormal discharges in the observation group were higher than those in the control group (P < 0.05). The detection rate of mild seizure in the observation group was lower than that in the control group, and the positive detection rate of moderate seizure, severe seizure and epilepsy in the observation group was higher than that in the control group (P < 0.05). Dynamic video-electroencephalogram confirmed that the epileptic seizure types were facial tonic-clonic seizure, absence seizure, myoclonic seizure, tonic seizure and dystonic seizure, accounting for 28.6%, 21.4%, 15.7%, 21.4% and 12.9% respectively;In the examination of the onset position of epilepsy by dynamic video-electroencephalogram, 40 cases of onset position were detected, and the others were not clear. 8 cases were found in frontal region, 13 cases in temporal region, 10 cases in temporal frontal region, 5 cases in occipital-temporal posterior region and 4 cases in frontal center. Conclusion: compared with routine ECG, the detection rate of dynamic video electroencephalogram is higher in epilepsy detection. It can also clarify the type and initial location of epileptic seizures and the severity of epilepsy, which can provide a basis for clinical diagnosis and treatment of the disease.
文摘The sustainable development of Chinas social economy, the heating pipe network project has also had a great development. At present, the society gives positive encouragement and advocacy to the sustainable development of the project, and takes energy conservation and emission reduction as a very important task at present. Environmental protection has also become the primary factor of project construction. Central heating has been gradually adopted by construction workers in the heat network, mainly because central heating can greatly reduce the cost of the project. But if there is a problem in a node in the heat network, it will lead to a large area of the heat network without heating phenomenon. Therefore, due to the complex pipe network, the quality danger of heating pipe network is easy to occur in the construction process. Strengthening the construction technology is an important basis to ensure the quality.
文摘Objective: to study the degree to which children with severe viral encephalitis can obtain rehabilitation nursing services during admission treatment, and to study the clinical value of rehabilitation nursing. Methods: choose in February 2019 to February 2022 three years into our treatment of severe viral encephalitis children as a research sample, into the scope of the children randomly processing, part of children into the control group to accept routine nursing services, the other part into the observation group of rehabilitation care services, collect children under the influence of two different nursing services, evaluate rehabilitation nursing services, the actual effect of application in children with severe viral encephalitis. Results: children receiving rehabilitation care were significantly different from the usual care services in terms of symptom improvement time and motor function score (P < 0.05), and the collected data were statistically significant. Conclusion: children with severe viral encephalitis limbs, consciousness, nerve aspects is affected by the serious, daily life and activities, clinical application of rehabilitation care, rehabilitation nursing services can be used in improving clinical symptoms and improve children movement function score plays an important role, so it is worth promoting in clinical practice.
文摘In the process of continuously improving the level of urbanization construction, the level of urban economic development is increasing, which also provides more opportunities for the development of the construction industry. Facing the increasingly serious contradiction between people and land, the construction of construction projects needs to develop towards high-rise buildings. In high-rise buildings, elevators can provide many conveniences for peoples lives. The safety and stability of their operation will be closely related to the safety of peoples lives and properties. Therefore, it is necessary to do a good job in the research of elevator braking in order to comprehensively improve the stability of elevator operation. In the following paragraphs, the principle of elevator brake is firstly discussed, then the reasons of elevator brake failure are analyzed, then the main requirements of elevator brake work are studied, and finally the inspection measures of elevator brake failure are comprehensively analyzed for reference.
文摘Objective: to analyze the related factors of death in emergency trauma patients and the treatment measures, and to provide effective reference for clinical diagnosis and treatment. Methods: 100 cases of trauma patients admitted to our emergency surgery department from 2015 to 2018 were selected for this retrospective analysis, focusing on discussing and analyzing the causes of death cases. Results: among the patients with different causes of injury, the death rate from falling from height was the highest, reaching 85.71%, followed by traffic accidents, with the death rate of 42.86%. Heavy blows, knife wounds and other causes were 40.00%, 20.00% and 20.00% respectively. In terms of the causes of death, craniocerebral injury, traumatic hemorrhagic shock and traumatic asphyxia accounted for 51.85%, 25.93% and 22.22% respectively. Conclusion: in the process of emergency surgical trauma patients' treatment, targeted prevention and treatment must be carried out for the high incidence of death causes, and pre-hospital and in-hospital first aid capabilities must be strengthened, so as to ensure the scientific treatment plan and reduce the mortality rate as far as possible.
