|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Hepatic lipid metabolism changes in short-and long-term prehepatic portal hypertensive rats显示文摘AIM: To verify the impairment of the hepatic lipid metabolism in prehepatic portal hypertension. METHODS: The concentrations of free fatty acids, diacylglycerol, triglycerides, and phospholipids were assayed by using D-[U-14C] glucose incorporation in the different lipid fractions and thin-layer chromatography and cholesterol was measured by spectrophotometry, in liver samples of Wistar rats with partial portal vein ligation at short- (1 mo) and long-term (1 year) (i.e. portal hypertensive rats) and the control rats. RESULTS: In the portal hypertensive rats, liver phospholipid synthesis significantly decreased (7.42 ± 0.50 vs 4.70 ± 0.44 nCi/g protein; P < 0.01) and was associated with an increased synthesis of free fatty acids (2.08 ± 0.14 vs 3.36 ± 0.33 nCi/g protein; P < 0.05), diacylglycerol (1.93 ± 0.2 vs 2.26 ± 0.28 nCi/g protein), triglycerides (2.40 ± 0.30 vs 4.49 ± 0.15 nCi/g protein) and cholesterol (24.28 ± 2.12 vs 57.66 ± 3.26 mg/g protein; P < 0.01). CONCLUSION: Prehepatic portal hypertension in rats impairs the liver lipid metabolism. This impairment consists in an increase in lipid deposits (triglycerides,diacylglycerol and cholesterol) in the liver, accompanied by a decrease in phospholipid synthesis. | Maria-Angeles Aller Elena Vara Cruz García Maria-Paz Nava Alejandra Angulo Fernando Sánchez-Patán Ana Calderón Patri Vergara Jaime Arias | 2006 | World Journal of Gastroenterology2006，12，42： | 2 |
| 2 | The Latin American population in Spain and organ donation. Attitude toward deceased organ donation and organ donation rates显示文摘 | Antonio Ríos Ana I. López‐Navas Juan C. Navalón Laura Martínez‐Alarcón Marco A. Ayala‐García María J. Sebastián‐Ruiz Francisco Moya‐Faz Gregorio Garrido Pablo Ramirez Pascual Parrilla | 2015 | Transpl Int2015，，4： | 1 |
| 3 | The phylogenetic position of Ixodes stilesi Neumann, 1911(Acari: Ixodidae): morphological and preliminary molecularevidences from 16S rDNA sequences显示文摘 | Alberto A. Guglielmone José M. Venzal Daniel González-Acu?a Santiago Nava Ana Hinojosa Atilio J. Mangold | 2006 | Systematic Parasitology2006，，1： | 1 |
| 4 | 半干旱区盐湖生态系统对灌溉和气候变化的响应西班牙Ebro盆地中部Salada Chiprana的历史显示文摘为了充分管理半干旱地区脆弱多变的环境,在比人类记录更长的时间尺度上把人类影响与气候或者其他的环境影响区分开来是至关重要的。我们应用孢粉、炭屑、沉积学、地球化学和放射性测年技术方法对西班牙Ebro盆地中部的Salada Chiprana盐湖沉积岩心进行了调查研究。结果表明,全新世晚期季节性的干盐湖在几个世纪以前迅速向永久性盐湖演化。湖沼的发育与农业生产活动变化有关,这就提供了从15世纪以来灌溉对湖泊水量平衡强烈影响的证据。本研究还显示,西班牙唯一的、永久性的、相对较深的、盐化度极高的盐湖是人类与自然景观长期相互作用的产物。 | BlasL.Valero-Garcés Ana Navas Javier Machin Tony Stevenson Basil Davis 鲁春霞 | 2000 | AMBIO-人类环境杂志2000，29，6： | 0 |
| 5 | Effects of cropland abandonment and afforestation on soil redistribution in a small Mediterranean mountain catchment显示文摘In slopes of Mediterranean mid-mountain areas,land use and land cover changes linked to the aban-donment of cropland activity affect soil quality and degradation and soil redistribution;however,limited attention has been paid to this issue at catchment scale.This paper evaluates the effects of cropland abandonment and post-land abandonment management(through natural revegetation and afforesta-tion)on soil redistribution rates using fallout ^(137)Cs measurements in the Araguás catchment(0.45 km^(2),Central Spanish Pyrenees).A total of 52 soil core samples,distributed in a regular grid,from the first 30-40 cm and 9 sectioned reference samples were collected across the catchment and soil properties were analysed.Fallout ^(137)Cs was measured in a 5 cm sectioned references samples and in bulk grid samples.^(137)Cs inventories were used to estimate soil erosion and deposition rates across the catchment.Results show that the highest erosion rates were recorded under sparsely vegetated sites in the badland area,while the lowest rates were found in the afforested area,but no significant differences were observed between the different uses and covers in soil redistribution rates likely due to a long history of human intervention through cultivation in steep slopes and afforestation practices.However,the recovery of the soil organic matter in afforested areas suggest that afforestation can reduce soil degradation at long-term scale.The information gained achieve a better understanding of soil redistribution dynamics and provide knowledge for effective land management after cropland abandonment of agroecosystems in Mediter-ranean mountain areas. | Makki Khorchani Leticia Gaspar Estela Nadal-Romero Jose Arnaez Teodoro Lasanta Ana Navas | 2023 | International Soil and Water Conservation Research2023，11，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员