Objective: To study the changes of partial pressure of oxygen in brain tissue ( P btO 2) and brain temperature (BT) in patients in acute phase of severe head injury, and to study the effect of mild hypothermia on P bt...Objective: To study the changes of partial pressure of oxygen in brain tissue ( P btO 2) and brain temperature (BT) in patients in acute phase of severe head injury, and to study the effect of mild hypothermia on P btO 2 and BT. Methods: The P btO 2 and the BT of 18 patients with severe head injury were monitored, and the patients were treated with mild hypothermia within 20 hours after injury. The rectal temperature (RT) of the patients was kept on 31.5- 34.9℃ for 1-7 days ( 57.7 hours± 28.4 hours averagely), simultaneously, the indexes of P btO 2 and BT were monitored for 1-5 days (with an average of 54.8 hours± 27.0 hours). According to Glasgow Outcome Scale (GOS), the prognosis of the patients was evaluated at 6 months after injury. Results: Within 24 hours after severe head injury, the P btO 2 was significantly lower ( 9.6 mm Hg± 6.8 mm Hg, 1 mm Hg= 0.133 kPa) than the normal value (16-40 mm Hg). After treatment of mild hypothermia, the mean P btO 2 increased to 28.7 mm Hg± 8.8 mm Hg during the first 24 hours, and the P btO 2 was still maintained within the range of normal value at 3 days after injury. The BT was higher than the RT in the patients in acute phase of severe head injury, and the difference between the BT and the RT significantly increased after treatment of mild hypothermia. Hyperventilation (the partial pressure of carbon dioxide in artery (P aCO 2)≈25 mm Hg) decreased the high intracranial pressure (ICP) and significantly decreased the P btO 2. Conclusions: This study demonstrates that P ptO 2 and BT monitoring is a safe, reliable and sensitive diagnostic method to follow cerebral oxygenation. It might become an important tool in our treatment regime for patients in the acute phase of severe head injury requiring hypothermia and hyperventilation.展开更多
[Objective] This study was to investigate the effects of different biochar dosages and trpes on growth, yield and output value of flue-cured tobacco in Hanzhong. [Methods] In May-September of 2013, Xiaonanhai Town, Na...[Objective] This study was to investigate the effects of different biochar dosages and trpes on growth, yield and output value of flue-cured tobacco in Hanzhong. [Methods] In May-September of 2013, Xiaonanhai Town, Nanzheng County, Hanzhong City, a field experiment was carded out to study the effects of- biochardosage and type on tobacco agronomic traits, yield and output value in each growth period. [Results] Biochar application significantly increased plant height, stem diameter and leaf size in the early growth pedod, and raised tobacco yield, output value and the proportion of high grade leaf： With the increase of biochar dosage, tobacco agronom~ traits were significantly improved, and yield, output value and proportion of high-grade tobacco leaves also increased significantly, and the highest tobacco yield and output value occurred at the dosage of 900 kg/hm2. Agronomic traits of tobacco leaves with the application of rice husk char and wheat straw char were significantly better than those with the application of peanut shell char, appli- cation of rice husk char was more conducive to the development of leaves in the vigorous pedod and stems in the squaring period, but straw char was beneficial to improvement of plant height and leaf number in the vigorous period and leaf growth in the squaring period, and application of rice husk char had the best effect on the increases of yield and output value of tobacco leaves. [Conclusion] Application of biochar is an effective measure forimproving tobacco-planting soil and promoting the growth and development of tobacco in Hanzhong, biochar application amount should be controlled at about 600-900 kg/hm2, and rice husk char is the preferred choice as soil improvement material.展开更多
文摘Objective: To study the changes of partial pressure of oxygen in brain tissue ( P btO 2) and brain temperature (BT) in patients in acute phase of severe head injury, and to study the effect of mild hypothermia on P btO 2 and BT. Methods: The P btO 2 and the BT of 18 patients with severe head injury were monitored, and the patients were treated with mild hypothermia within 20 hours after injury. The rectal temperature (RT) of the patients was kept on 31.5- 34.9℃ for 1-7 days ( 57.7 hours± 28.4 hours averagely), simultaneously, the indexes of P btO 2 and BT were monitored for 1-5 days (with an average of 54.8 hours± 27.0 hours). According to Glasgow Outcome Scale (GOS), the prognosis of the patients was evaluated at 6 months after injury. Results: Within 24 hours after severe head injury, the P btO 2 was significantly lower ( 9.6 mm Hg± 6.8 mm Hg, 1 mm Hg= 0.133 kPa) than the normal value (16-40 mm Hg). After treatment of mild hypothermia, the mean P btO 2 increased to 28.7 mm Hg± 8.8 mm Hg during the first 24 hours, and the P btO 2 was still maintained within the range of normal value at 3 days after injury. The BT was higher than the RT in the patients in acute phase of severe head injury, and the difference between the BT and the RT significantly increased after treatment of mild hypothermia. Hyperventilation (the partial pressure of carbon dioxide in artery (P aCO 2)≈25 mm Hg) decreased the high intracranial pressure (ICP) and significantly decreased the P btO 2. Conclusions: This study demonstrates that P ptO 2 and BT monitoring is a safe, reliable and sensitive diagnostic method to follow cerebral oxygenation. It might become an important tool in our treatment regime for patients in the acute phase of severe head injury requiring hypothermia and hyperventilation.
基金Supported by Major Project of Shaanxi Tobacco Corporation in 2013:"Research on Key Technique for Soil Improvement and Application in Tobacco-Growing Area of Hanzhong"Major Project of Henan Tobacco Corporation(HYKJ201215,HYKJ201315)~~
文摘[Objective] This study was to investigate the effects of different biochar dosages and trpes on growth, yield and output value of flue-cured tobacco in Hanzhong. [Methods] In May-September of 2013, Xiaonanhai Town, Nanzheng County, Hanzhong City, a field experiment was carded out to study the effects of- biochardosage and type on tobacco agronomic traits, yield and output value in each growth period. [Results] Biochar application significantly increased plant height, stem diameter and leaf size in the early growth pedod, and raised tobacco yield, output value and the proportion of high grade leaf： With the increase of biochar dosage, tobacco agronom~ traits were significantly improved, and yield, output value and proportion of high-grade tobacco leaves also increased significantly, and the highest tobacco yield and output value occurred at the dosage of 900 kg/hm2. Agronomic traits of tobacco leaves with the application of rice husk char and wheat straw char were significantly better than those with the application of peanut shell char, appli- cation of rice husk char was more conducive to the development of leaves in the vigorous pedod and stems in the squaring period, but straw char was beneficial to improvement of plant height and leaf number in the vigorous period and leaf growth in the squaring period, and application of rice husk char had the best effect on the increases of yield and output value of tobacco leaves. [Conclusion] Application of biochar is an effective measure forimproving tobacco-planting soil and promoting the growth and development of tobacco in Hanzhong, biochar application amount should be controlled at about 600-900 kg/hm2, and rice husk char is the preferred choice as soil improvement material.
