Objective：To evaluate Tpeak-Tend （Tp-e） interval in surface standard ECG as a new risk factor for arrhythmic event in patient with Brugada syndrome. Methods： 23 male patients with Brugada syndrome and 20 male pati...Objective：To evaluate Tpeak-Tend （Tp-e） interval in surface standard ECG as a new risk factor for arrhythmic event in patient with Brugada syndrome. Methods： 23 male patients with Brugada syndrome and 20 male patients with paroxysmal supraventricular tachycardia （PSVT） as the control group were investigated in this study. Tp-e interval in surface standard ECG was compared between BrS and PSVT patients. Results： Tp-e interval in BrS patients was significantly longer than that in PSVT patients （109.57±22.86 ms vs. 88.50±13.08ms, P〈0.05）. There was significant difference in Tp-e interval between 16 BrS patients with arrhythmic events （including syncope, clinical ventricular fibrillation [VF] and programmed electrica/ stimulation [PES]-induced VF） and 7 BrS patients without arrhythmic events and PSVT patients （118.12±20.40ms vs. 90.00±15.27ms, P〈0.05; 118.12±20.40ms vs. 88.50±13.08ms, P〈0.05）. However, Tp-e interval was similar in BrS patients without arrhythmic events and PSVT patients （90.00±15.27ms vs 88.50±13.08ms, P〉0.05）. Conclusion： The prolongation of Tp-e interval could serve as a new noninvasive event predictor for arrhythmic events in patients with Brugada syndrome.展开更多
This paper introduced the preparation work before transplanting big olive trees(Olea europaea L.),including key technical measures such as plant excavation,transportation,planting,and post-planting tending.The aim was...This paper introduced the preparation work before transplanting big olive trees(Olea europaea L.),including key technical measures such as plant excavation,transportation,planting,and post-planting tending.The aim was to provide scientific basis and feasible solutions for adjusting the density of olive trees in Shiyan City,and to assist in the high-quality development of the olive industry.展开更多
Tending management and pest control directly affect forest construction.Not only sustainable growth of timber but also continuous and permanent use of green mountains and water can be achieved by providing tending man...Tending management and pest control directly affect forest construction.Not only sustainable growth of timber but also continuous and permanent use of green mountains and water can be achieved by providing tending management measures for sustainable operations and implementing effective pest control measures.According to the demand of production practice,this paper studies the tending management and pest control measures of Pinus koraiensis forest during its growth period,so as to provide important scientific support for improving the quality of P.koraiensis forest in the future.展开更多
Under the current social development environment, in order to further promote the harmonious and coordinated development of man and nature, it is necessary to implement the management and optimization of forest resour...Under the current social development environment, in order to further promote the harmonious and coordinated development of man and nature, it is necessary to implement the management and optimization of forest resources, among which forest tending must be perfected. Forest tending work is based on scientific and reasonable means, combined with the actual growth law of forest resources and the growth characteristics of communities in different regions, to implement the cultivation and expansion of the resource system by means of artificial intervention. At the same time, the plan should be reasonably adjusted in combination with the overall demand and development status of forest resources in the society. It has strong systematic characteristics. Forest tending can promote the forest resources to be managed and protected in an all-round way, and improve their social and economic benefits and ecological benefits.展开更多
At this stage, in order to accelerate the development of regional forestry, the first step is to make rational use of forestry forestation and tending technology, strengthen the attention to the management of seedling...At this stage, in order to accelerate the development of regional forestry, the first step is to make rational use of forestry forestation and tending technology, strengthen the attention to the management of seedlings, young forests and mature forests during the growth of trees, and do a good job in the relevant control of fire prevention, damage prevention, pest prevention, etc. The mature trees should be cut and protected in a standardized way so as to create economic benefits in forestry production and realize the long-term sustainable development of forestry and provide a good environmental foundation for the construction of social and ecological civilization.展开更多
With the rapid development of social economy, China has gradually begun to attach great importance to ecological environment protection and ecological civilization construction. At the same time, innovative forest ten...With the rapid development of social economy, China has gradually begun to attach great importance to ecological environment protection and ecological civilization construction. At the same time, innovative forest tending management techniques and new forest tending management techniques are selected to effectively expand the total green area. However, in reality, there are still some shortcomings in the forest tending management technology. It is necessary to work out all-round management plans from the fields of management and the comprehensive ability of staff, so as to make contributions to improving the environment in China.展开更多
The management of larch is very important, which is the key period to ensure the output of seedlings and improve the quality of seedlings. In order to further improve the overall afforestation level and quality of Lar...The management of larch is very important, which is the key period to ensure the output of seedlings and improve the quality of seedlings. In order to further improve the overall afforestation level and quality of Larix gmelinii, combining with practice, this paper analyzes the afforestation techniques and corresponding tending management of Larix gmelinii from the aspects of nursery site selection, land preparation and bed making, seed treatment and sowing, etc., and makes targeted analysis from three aspects: seedling management, afforestation management and tending management in fallen leaves, aiming to provide some technical reference for Larix gmelinii afforestation.展开更多
In order to improve the level of forest management, it is necessary to strengthen the innovation and optimization of forest management technology in order to protect forest resources and meet the needs of forest ecosy...In order to improve the level of forest management, it is necessary to strengthen the innovation and optimization of forest management technology in order to protect forest resources and meet the needs of forest ecosystems. The key of logging technology is to solve the problems in the process of tree growth through various logging measures and healthy growth of trees. Through in-depth analysis of relevant forestry technology content, we are studying the important role of forestry technology in forest diameter, forest height, effective protection of wood and improvement of forest quality and environmental sanitation and the growth of trees.展开更多
8. Ji Daiyu, General Manager of Baotou Xinyuan RareEarth Hi-Tech Materials Co. LtdControl gross to stabilize prices. Chinese rare earth is precious strategic resource. The more it is exploit, the less it will be. The ...8. Ji Daiyu, General Manager of Baotou Xinyuan RareEarth Hi-Tech Materials Co. LtdControl gross to stabilize prices. Chinese rare earth is precious strategic resource. The more it is exploit, the less it will be. The State has put forward rare earth policy of "strengthen management, protect resource, develop scientifically and face international". Chinese rare展开更多
Background： Prolongation of the Tpeak-Tend （TpTe） interval as a measurement of transmural dispersion of repolarization （TDR） is an independent risk factor for chronic heart failure mortality, However, the cardiac...Background： Prolongation of the Tpeak-Tend （TpTe） interval as a measurement of transmural dispersion of repolarization （TDR） is an independent risk factor for chronic heart failure mortality, However, the cardiac resynchronization therapy＇s （CRT） effect on TDR is controversial. Therefore, this study aimed to evaluate CRTs acute and chronic effects on repolarization dispersion. Furthermore, we aimed to investigate the relationship between TpTe changes and ventricular arrbythmia. Methods： The study group consisted of 101 patients treated with CRT-defibrillator （CRT-D）. According to whether TpTe was shortened, patients were grouped at immediate and l-year follow-up after CRT, respectively. The echocardiogram index and ventricular arrhythmia were observed and compared in these subgroups. Results： For all patients, TpTe slightly increased immediately after CRT-D implantation, and then decreased at the l -year follow-up （from 107 ± 23 to 110 ± 21 rns within 24 h, to 94 ± 24 ms at 1-year follow-up, F 19.366, P 〈 0.001）. No significant difference in the left ventricular reverse remodeling and ventricular tachycardia/ventricular fibrillation （VT/VF） episodes between the TpTe immediately shortened and TpTe immediately nonshortened groups. However, patients in the TpTe at l-year shorten had a higher rate of the lelt ventricular （LV） reverse remodeling （65% vs. 44%, Z2 = 4.495, P - 0.038） and less VT/VF episodes （log-rank test, X2 - 10.207, P = 0.001 ） compared with TpTe I-year nonshortened group. TpTe immediately alter CRT-D independently predicted VT/VF episodes at l-year follow-up （hazard ratio [HR], 1.030; P = 0.001 ）. Conclusions： Patients with TpTe shortened at l -year after CRT had a higher rate of LV reverse remodeling and less VT/VF episodes. The acute changes of TpTe after CRT have minimal value on mechanical reverse remodeling and ventricular arrhythmia.展开更多
基金This study was supported by National Natural Science Foundation ofChina (No: 30570746)
文摘Objective：To evaluate Tpeak-Tend （Tp-e） interval in surface standard ECG as a new risk factor for arrhythmic event in patient with Brugada syndrome. Methods： 23 male patients with Brugada syndrome and 20 male patients with paroxysmal supraventricular tachycardia （PSVT） as the control group were investigated in this study. Tp-e interval in surface standard ECG was compared between BrS and PSVT patients. Results： Tp-e interval in BrS patients was significantly longer than that in PSVT patients （109.57±22.86 ms vs. 88.50±13.08ms, P〈0.05）. There was significant difference in Tp-e interval between 16 BrS patients with arrhythmic events （including syncope, clinical ventricular fibrillation [VF] and programmed electrica/ stimulation [PES]-induced VF） and 7 BrS patients without arrhythmic events and PSVT patients （118.12±20.40ms vs. 90.00±15.27ms, P〈0.05; 118.12±20.40ms vs. 88.50±13.08ms, P〈0.05）. However, Tp-e interval was similar in BrS patients without arrhythmic events and PSVT patients （90.00±15.27ms vs 88.50±13.08ms, P〉0.05）. Conclusion： The prolongation of Tp-e interval could serve as a new noninvasive event predictor for arrhythmic events in patients with Brugada syndrome.
基金Supported by Central Finance Forestry Science and Technology Demonstration and Extension Project (E[2023]TG14).
文摘This paper introduced the preparation work before transplanting big olive trees(Olea europaea L.),including key technical measures such as plant excavation,transportation,planting,and post-planting tending.The aim was to provide scientific basis and feasible solutions for adjusting the density of olive trees in Shiyan City,and to assist in the high-quality development of the olive industry.
文摘Tending management and pest control directly affect forest construction.Not only sustainable growth of timber but also continuous and permanent use of green mountains and water can be achieved by providing tending management measures for sustainable operations and implementing effective pest control measures.According to the demand of production practice,this paper studies the tending management and pest control measures of Pinus koraiensis forest during its growth period,so as to provide important scientific support for improving the quality of P.koraiensis forest in the future.
文摘Under the current social development environment, in order to further promote the harmonious and coordinated development of man and nature, it is necessary to implement the management and optimization of forest resources, among which forest tending must be perfected. Forest tending work is based on scientific and reasonable means, combined with the actual growth law of forest resources and the growth characteristics of communities in different regions, to implement the cultivation and expansion of the resource system by means of artificial intervention. At the same time, the plan should be reasonably adjusted in combination with the overall demand and development status of forest resources in the society. It has strong systematic characteristics. Forest tending can promote the forest resources to be managed and protected in an all-round way, and improve their social and economic benefits and ecological benefits.
文摘At this stage, in order to accelerate the development of regional forestry, the first step is to make rational use of forestry forestation and tending technology, strengthen the attention to the management of seedlings, young forests and mature forests during the growth of trees, and do a good job in the relevant control of fire prevention, damage prevention, pest prevention, etc. The mature trees should be cut and protected in a standardized way so as to create economic benefits in forestry production and realize the long-term sustainable development of forestry and provide a good environmental foundation for the construction of social and ecological civilization.
文摘With the rapid development of social economy, China has gradually begun to attach great importance to ecological environment protection and ecological civilization construction. At the same time, innovative forest tending management techniques and new forest tending management techniques are selected to effectively expand the total green area. However, in reality, there are still some shortcomings in the forest tending management technology. It is necessary to work out all-round management plans from the fields of management and the comprehensive ability of staff, so as to make contributions to improving the environment in China.
文摘The management of larch is very important, which is the key period to ensure the output of seedlings and improve the quality of seedlings. In order to further improve the overall afforestation level and quality of Larix gmelinii, combining with practice, this paper analyzes the afforestation techniques and corresponding tending management of Larix gmelinii from the aspects of nursery site selection, land preparation and bed making, seed treatment and sowing, etc., and makes targeted analysis from three aspects: seedling management, afforestation management and tending management in fallen leaves, aiming to provide some technical reference for Larix gmelinii afforestation.
文摘In order to improve the level of forest management, it is necessary to strengthen the innovation and optimization of forest management technology in order to protect forest resources and meet the needs of forest ecosystems. The key of logging technology is to solve the problems in the process of tree growth through various logging measures and healthy growth of trees. Through in-depth analysis of relevant forestry technology content, we are studying the important role of forestry technology in forest diameter, forest height, effective protection of wood and improvement of forest quality and environmental sanitation and the growth of trees.
文摘8. Ji Daiyu, General Manager of Baotou Xinyuan RareEarth Hi-Tech Materials Co. LtdControl gross to stabilize prices. Chinese rare earth is precious strategic resource. The more it is exploit, the less it will be. The State has put forward rare earth policy of "strengthen management, protect resource, develop scientifically and face international". Chinese rare
文摘Background： Prolongation of the Tpeak-Tend （TpTe） interval as a measurement of transmural dispersion of repolarization （TDR） is an independent risk factor for chronic heart failure mortality, However, the cardiac resynchronization therapy＇s （CRT） effect on TDR is controversial. Therefore, this study aimed to evaluate CRTs acute and chronic effects on repolarization dispersion. Furthermore, we aimed to investigate the relationship between TpTe changes and ventricular arrbythmia. Methods： The study group consisted of 101 patients treated with CRT-defibrillator （CRT-D）. According to whether TpTe was shortened, patients were grouped at immediate and l-year follow-up after CRT, respectively. The echocardiogram index and ventricular arrhythmia were observed and compared in these subgroups. Results： For all patients, TpTe slightly increased immediately after CRT-D implantation, and then decreased at the l -year follow-up （from 107 ± 23 to 110 ± 21 rns within 24 h, to 94 ± 24 ms at 1-year follow-up, F 19.366, P 〈 0.001）. No significant difference in the left ventricular reverse remodeling and ventricular tachycardia/ventricular fibrillation （VT/VF） episodes between the TpTe immediately shortened and TpTe immediately nonshortened groups. However, patients in the TpTe at l-year shorten had a higher rate of the lelt ventricular （LV） reverse remodeling （65% vs. 44%, Z2 = 4.495, P - 0.038） and less VT/VF episodes （log-rank test, X2 - 10.207, P = 0.001 ） compared with TpTe I-year nonshortened group. TpTe immediately alter CRT-D independently predicted VT/VF episodes at l-year follow-up （hazard ratio [HR], 1.030; P = 0.001 ）. Conclusions： Patients with TpTe shortened at l -year after CRT had a higher rate of LV reverse remodeling and less VT/VF episodes. The acute changes of TpTe after CRT have minimal value on mechanical reverse remodeling and ventricular arrhythmia.
