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2.
Ying Yong Sheng Tai Xue Bao ; 29(3): 850-856, 2018 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-29722227

RESUMO

Clarifying the carbon emissions in wheat-summer direct-seeding peanut planting (W-P) system could help realize the synergistic effects of high yield and low carbon emissions. Based on whole life cycle method, we constructed a carbon footprint model to calculate the carbon emissions of W-P system. We found that the net income of W-P system was 71.2%-88.3% higher than that of wheat-maize rotation (W-M) system. The carbon emissions per unit area under W-P system was 6977.9-8018.5 kg·hm-2, being 6.2% higher than that of W-M system. The carbon emission of per net income under W-P system was 0.23-0.28 kg CO2-eq·yuan-1, which was 37.4%-44.1% lower than that of W-M system. Combining the net income and carbon emissions of per net income, W-P system could achieve synergistic effects of high yield and low carbon emissions, which would fulfill the targets of agricultural supply-side structural reform with optimizing supply, enhancing quality and efficiency, and increasing income of peasants.


Assuntos
Arachis , Pegada de Carbono , Triticum , Agricultura , China
3.
Int J Cardiol ; 177(1): 61-5, 2014 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-25499341

RESUMO

BACKGROUND: The Rho-kinase pathway has been shown to be involved in the pathogenesis of PAH. As yet, however, the acute effects of the Rho-kinase inhibitor fasudil have not been compared with established pulmonary selective vasodilators in patients with PAH. We compared the acute effects of intravenous fasudil with inhaled iloprost in patients with pulmonary arterial hypertension (PAH). METHODS: Using a crossover design, 50 patients with PAH (idiopathic PAH, PAH associated with repaired left-to-right cardiac shunts, or connective tissue disease) were randomized to iloprost inhalation (5 µg) and intravenous fasudil (30 mg over 30 min). Hemodynamic data were collected at baseline and during acute drug exposure. RESULTS: Comparable decreases were observed in mean pulmonary artery pressure (-4.6 ± 4.3 mmHg vs. -4.8 ± 4.2 mmHg) and pulmonary vascular resistance (-3.0 ± 3.0 Wood U vs. -2.2 ± 2.7 Wood U) with fasudil infusion and iloprost inhalation, respectively, during acute challenge. However, fasudil infusion resulted in a more pronounced increase in mean cardiac output and mixed venous oxygen saturation compared with iloprost inhalation (13.7 ± 17.1% vs. 6.9 ± 15.0%; p=0.044 and 4.5 ± 5.3% vs. 2.7 ± 8.2%; p=0.044, respectively). Whereas inhaled iloprost resulted in a non-significant increase in mean systemic arterial oxygen saturation (0.8 ± 3.6%), infused fasudil resulted in a non-significant reduction (-0.6 ± 1.1%). CONCLUSION: Infused fasudil improved pulmonary hemodynamics in patients with PAH without significant toxicity.


Assuntos
1-(5-Isoquinolinasulfonil)-2-Metilpiperazina/análogos & derivados , Hipertensão Pulmonar Primária Familiar/tratamento farmacológico , Hemodinâmica/efeitos dos fármacos , 1-(5-Isoquinolinasulfonil)-2-Metilpiperazina/administração & dosagem , Administração por Inalação , Adolescente , Adulto , Estudos Cross-Over , Relação Dose-Resposta a Droga , Quimioterapia Combinada , Hipertensão Pulmonar Primária Familiar/fisiopatologia , Feminino , Humanos , Iloprosta/administração & dosagem , Infusões Intravenosas , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento , Vasodilatadores/administração & dosagem , Adulto Jovem
4.
Ying Yong Sheng Tai Xue Bao ; 25(5): 1387-94, 2014 May.
Artigo em Chinês | MEDLINE | ID: mdl-25129940

RESUMO

The effects of root cutting on root system distribution and senescence character of peanut (Arachis hypogaea) under different seedling conditions were investigated by using the box culture method. The results showed that, with three types of peanut seedlings, including overgrowing, strong and week seedlings, root cutting all first restricted and then promoted the root system growth, especially promoted the root growth to deep soil. This effect was stronger on the overgrowing and strong seedlings, while relatively weaker on the weak seedlings. After root cutting, root activity, superoxide dismutase (SOD) and peroxidase (POD) activity all reduced at first, and then increased, compared with each control. The extents of decrease in root activity, SOD and POD activity were highest in the weak seedlings, lowest in the overgrowing seedlings, and moderate in the strong seedlings. However, in the later stage after root cutting, the extents of increase in root activity, SOD and POD activity were higher in the overgrowing and strong seedlings, than in the weak seedlings. Generally, root cutting could promote the root activity of peanut and delay the senescence.


Assuntos
Arachis/fisiologia , Raízes de Plantas/fisiologia , Plântula/fisiologia , Peroxidases/metabolismo , Superóxido Dismutase/metabolismo
5.
Ying Yong Sheng Tai Xue Bao ; 25(2): 483-7, 2014 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-24830249

RESUMO

This study explored the effects of different light quality on photosynthetic pigment contents and photosynthetic characteristics of peanut (Qinhua 6) seedling leaves. The results showed that, compared with natural light, blue light (445-470 nm) could significantly improve the specific leaf area (SLA), chlorophyll a/b value and carotenoid content of peanut seedlings. Meanwhile, the net photosynthetic rate, stomatal conductance, and transpiration rate were higher, the intercellular CO2 content was lower, and the photosynthetic efficiency was improved significantly under blue light. Red light (610-660 nm) could improve the chlorophyll content significantly, and reduce SLA, chlorophyll a/b value and carotenoid content, with a lower photosynthetic efficiency than natural light. Green light (515-520 nm) and yellow light (590-595 nm) were not conducive to photosynthetic pigment accumulation of leaves, and significantly inhibited leaf photosynthesis of peanut seedlings.


Assuntos
Arachis/fisiologia , Clorofila/análise , Luz , Fotossíntese , Clorofila A , Folhas de Planta/fisiologia , Estômatos de Plantas , Transpiração Vegetal , Plântula/fisiologia
6.
Zhonghua Wai Ke Za Zhi ; 51(6): 527-32, 2013 Jun 01.
Artigo em Chinês | MEDLINE | ID: mdl-24091268

RESUMO

OBJECTIVE: To evaluate the effectiveness and safty of tranexamic acid in patients receiving on-pump coronary artery bypass grafting (CABG) without clopidogrel and aspirin cessation. METHODS: The current study is a prospective, randomized and placebo-control trial. A total of 116 patients receiving selective on-pump CABG with their last ingestion of clopidogrle and aspirin within 7 days preoperatively were recruited. Despite 6 patients withdrawal their consent, the rest 110 were randomized to receive tranexamic acid or placebo. The tranexamic acid regimen was a bolus of 10 mg/kg followed by a maintenance of 10 mg·kg(-1)·h(-1) throughout the surgery. The primary outcome was the volume of allogeneic erythrocyte transfused perioperatively. RESULTS: Baseline characteristics were comparable between the groups. In patients receiving tranexamic acid and placebo respectively, the volume of allogeneic erythrocyte transfused was 4.0 (7.5) units and 6.0(6.0) units (W = 1021, P < 0.01). In these 2 groups respectively, blood loss was 930 (750) ml and 1210 (910) ml (W = 1042, P < 0.01), the incidence of major bleeding was 50.9% and 76.4% (χ(2) = 7.70, P < 0.01), the incidence of reoperation was 0 and 9.1% (χ(2) = 5.24, P = 0.02); the volume of plasma transfused was 400 (600) ml and 600 (650) ml (W = 1072, P = 0.01), the exposure of plasma was 60.0% and 85.5% (χ(2) = 8.98, P < 0.01) and the exposure to any allogeneic blood products was 85.5% and 98.2% (χ(2) = 5.93, P = 0.01). Perioperative mortality, morbidity and the incidence of adverse events were balanced between the groups without statistical significance. CONCLUSION: Tranexamic acid reduced significantly postoperative bleeding and transfusion in patients receiving on-pump CABG without clopidogrel and aspirin cessation.


Assuntos
Ponte de Artéria Coronária , Hemorragia Pós-Operatória/prevenção & controle , Ácido Tranexâmico/uso terapêutico , Idoso , Idoso de 80 Anos ou mais , Aspirina/uso terapêutico , Transfusão de Sangue , Clopidogrel , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Ticlopidina/análogos & derivados , Ticlopidina/uso terapêutico , Ácido Tranexâmico/efeitos adversos
7.
Ying Yong Sheng Tai Xue Bao ; 24(3): 747-52, 2013 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-23755490

RESUMO

Taking the Arachis hypogaea cv. 'Qinghua 7' as test material, a field experiment was conducted to study the effects of different cultivation modes on the leaf photosynthetic characteristics and yield of summer-sowing peanut after wheat harvest. As compared with conventional cultivation mode, high-yield protective cultivation mode promoted the leaf growth, significantly improved the leaf area index (LAI), and maintained a longer time of high LAI and chlorophyll content. Meanwhile, the net photosynthetic rate, stomatal conductance, and transpiration rate of functional leaves under high-yield protective cultivation mode were higher while the intercellular CO2 concentration was lower, which induced the photosynthetic efficiency of functional leaves being significantly improved. Therefore, under high-yield protective cultivation mode, the yield per peanut plant was higher, the pod yield increased significantly, and the economic coefficient improved obviously. Both film mulching and straw returning could also improve the leaf photosynthesis of summer-sowing peanut, and increase the peanut yield. It was suggested that high-yield protective cultivation mode could effectively alleviate the adverse factors of summer-sowing peanut, such as the short growth period and lower productivity per plant, being a practical high-yield cultivation mode of summer-sowing peanut.


Assuntos
Agricultura/métodos , Arachis/crescimento & desenvolvimento , Fotossíntese/fisiologia , Folhas de Planta/fisiologia , Arachis/fisiologia , Biomassa , China , Folhas de Planta/crescimento & desenvolvimento , Estações do Ano
8.
C R Biol ; 332(8): 759-64, 2009 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-19632660

RESUMO

Wheat (Triticum aestivum L.) is one of the most important agricultural crops worldwide. However, water is the most important limiting factor for wheat production. This study was initiated to test water stress environmental effects on grain quality and nutritional value of wheat by using single different water conditions at post-anthesis stage. Further analyses were conducted to examine variations in concentrations and compositions of the bioactive compounds and nutritions in strong-gluten winter wheat subjected to different levels of water deficit during grain filling. For the experiment on the response to different soil water conditions during post-anthesis stage, effects of soil water environment on protein content and composition in the grains were significant. Soil water conditions in this study greatly affected mineral contents in the grains of winter wheat, particularly with regard to the major minerals (P, K, Ca and Mg). Water deficit during grain filling can result in a decrease in lipid contents in wheat grains, which agrees well with experimental findings elsewhere. Concomitantly, a mild water deficit during grain filling would be beneficial to the grain filling and starch compositions, significantly improved bread-making quality. Therefore, it was concluded that good management of wheat field water at post-anthesis stage was helpful to improving grain quality and nutritions relevant to processing and human nutrition.


Assuntos
Sementes/efeitos dos fármacos , Triticum/efeitos dos fármacos , Água/farmacologia , Agricultura/métodos , Minerais/análise , Valor Nutritivo , Óleos Vegetais/análise , Proteínas de Plantas/análise , Sementes/química , Sementes/crescimento & desenvolvimento , Solo/análise , Amido/análise , Triticum/química , Triticum/crescimento & desenvolvimento
9.
Ying Yong Sheng Tai Xue Bao ; 19(11): 2388-93, 2008 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-19238837

RESUMO

A rain-proof pool culture experiment was conducted to study the effects of nitrogen (N) application rate and post-anthesis soil moisture content on the flag leaf senescence and kernel weight of wheat. The results indicated that in all N fertilization treatments, the flag leaf SPAD value, soluble protein content, SOD and CAT activities, and photosynthetic rate decreased in the order of 60% -70% > 80%-90% >40%-50% post-anthesis soil moisture content, while the MDA content decreased in reverse order, suggesting that over high or low post-anthesis soil moisture content could cause the early senescence of flag leaves, impact grain filling, and decrease kernel weight. Under the same post-anthesis soil moisture content, the SPAD value, soluble protein content, SOD and CAT activity, and photosynthetic rate increased, while the MDA content decreased with increasing N application rate, indicating that increased N fertilization could postpone the senescence of wheat flag leaves. However, over N application was not favorable to the increase of kernel weight, especially under the condition of post-anthesis soil moisture deficiency. It was concluded that appropriate N application and post-anthesis soil moisture content control could postpone the plant senescence and increase the kernel weight of wheat.


Assuntos
Fertilizantes , Nitrogênio/análise , Solo/análise , Triticum/crescimento & desenvolvimento , Água/análise , Biomassa , Nitrogênio/metabolismo , Folhas de Planta/fisiologia , Proteínas/análise , Triticum/metabolismo , Triticum/fisiologia , Água/metabolismo
10.
Zhong Yao Cai ; 30(3): 264-6, 2007 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-17634029

RESUMO

The effects of different nitrogenous fertilizer on carbon metabolism in Glehnia littoralis were studied under the field condition. The results showed that the Sucrose Phosphat Synthase (SPS) activities and the content of soluble sugar in leaves showed the pattern of single peak curve during the growth period, and both highest level were similary appeared in the middle stage. The suitable rate of nitrogenous fertilizer can improve the SPS activities, the content of soluble sugar, the root Sucrose Synthase (SS) activities, and also kept low level of leaves soluble sugar in harvest. So it can be supply sufficient for assimilation of polysaccharide in the root as well as to increase the yield.


Assuntos
Apiaceae/efeitos dos fármacos , Apiaceae/metabolismo , Carbono/metabolismo , Nitrogênio/farmacologia , Fertilizantes , Folhas de Planta/efeitos dos fármacos , Folhas de Planta/metabolismo
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