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Adams-Oliver综合征5型合并IgA肾病1例并文献复习
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作者 史慧远 宋纯东 张博 《疑难病杂志》 CAS 2024年第8期999-1001,共3页
报道1例Adams-Oliver综合征5型合并IgA肾病患儿的临床资料,并进行文献复习。
关键词 Adams-oliver综合征5型 NOTCH1基因 IGA肾病 诊断 治疗
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Olive Leaf Disease Detection via Wavelet Transform and Feature Fusion of Pre-Trained Deep Learning Models
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作者 Mahmood A.Mahmood Khalaf Alsalem 《Computers, Materials & Continua》 SCIE EI 2024年第3期3431-3448,共18页
Olive trees are susceptible to a variety of diseases that can cause significant crop damage and economic losses.Early detection of these diseases is essential for effective management.We propose a novel transformed wa... Olive trees are susceptible to a variety of diseases that can cause significant crop damage and economic losses.Early detection of these diseases is essential for effective management.We propose a novel transformed wavelet,feature-fused,pre-trained deep learning model for detecting olive leaf diseases.The proposed model combines wavelet transforms with pre-trained deep-learning models to extract discriminative features from olive leaf images.The model has four main phases:preprocessing using data augmentation,three-level wavelet transformation,learning using pre-trained deep learning models,and a fused deep learning model.In the preprocessing phase,the image dataset is augmented using techniques such as resizing,rescaling,flipping,rotation,zooming,and contrasting.In wavelet transformation,the augmented images are decomposed into three frequency levels.Three pre-trained deep learning models,EfficientNet-B7,DenseNet-201,and ResNet-152-V2,are used in the learning phase.The models were trained using the approximate images of the third-level sub-band of the wavelet transform.In the fused phase,the fused model consists of a merge layer,three dense layers,and two dropout layers.The proposed model was evaluated using a dataset of images of healthy and infected olive leaves.It achieved an accuracy of 99.72%in the diagnosis of olive leaf diseases,which exceeds the accuracy of other methods reported in the literature.This finding suggests that our proposed method is a promising tool for the early detection of olive leaf diseases. 展开更多
关键词 olive leaf diseases wavelet transform deep learning feature fusion
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Eco-physiological characteristics of Tetracentron sinense Oliv.saplings in response to different light intensities
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作者 Rong Wang Xueheng Lu +4 位作者 Hongyan Han Xuemei Zhang Yonghong Ma Qinsong Liu Xiaohong Gan 《Journal of Forestry Research》 SCIE EI CAS CSCD 2024年第3期29-44,共16页
The regeneration of Tetracentron sinense Oliv.is poor in the understory and in open areas due to the charac-teristics of natural regeneration of the species on forest edges and in gaps.It is unclear whether different ... The regeneration of Tetracentron sinense Oliv.is poor in the understory and in open areas due to the charac-teristics of natural regeneration of the species on forest edges and in gaps.It is unclear whether different light intensities in various habitats affect eco-physiological characteristics of saplings and their natural regeneration.In this study,the light intensity in T.sinense habitats was simulated by artificial shading(L1:100%NS(natural sunlight)in the open;L2:50%NS in a forest gap or edge;L3:10%NS in understory)to investigate differences in morphology,leaf structure,physiology,and photosynthesis of 2-year-old sap-lings,and to analyze the mechanism of light intensity on sapling establishment.Significant differences were observed in morphology(including leaf area,and specific leaf area)under different light intensities.Compared to L1 and L3,chloroplast structure in L2 was intact.With increasing time,superoxide dismutase(SOD)and catalase(CAT)activities in L2 became gradually higher than under the other light intensities,while malondialdehyde(MDA)content was opposite.Shading decreased osmoregulation substance contents of leaves but increased chlorophyll.The results suggest that light intensities significantly affect the eco-physiological characteristics of T.sinense saplings and they would respond most favorably at intermediate levels of light by optimizing eco-physiological characteristics.Therefore,50%natural sunlight should be created to promote saplings establishment and population recovery of T.sinense during in situ conservation,including sowing mature seeds in forest edges or gaps and providing appropriate shade protection for seedlings and saplings in the open. 展开更多
关键词 Chloroplast ultrastructure Eco-physiological characteristics Light intensities Sapling establishment Tetracentron sinense oliv
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Protective effects of oleic acid and polyphenols in extra virgin olive oil on cardiovascular diseases
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作者 Yan Lu Jun Zhao +6 位作者 Qiqi Xin Rong Yuan Yu Miao Manli Yang Hui Mo Keji Chen Weihong Cong 《Food Science and Human Wellness》 SCIE CSCD 2024年第2期529-540,共12页
The Mediterranean diet has long been recognized as one of the most effective ways to prevent and improve cardiovascular disease.Extra virgin olive oil(EVOO)is the typical sources of fat in the Mediterranean diet which... The Mediterranean diet has long been recognized as one of the most effective ways to prevent and improve cardiovascular disease.Extra virgin olive oil(EVOO)is the typical sources of fat in the Mediterranean diet which have been shown to have noteworthy nutritional value and positive impact on human health.It is worth noting that EVOO owes its superior nutritional value to its bioactive composition.The main component of EVOO is monounsaturated fatty acids(MUFAs)in the form of oleic acid.Oleic acid accounts for up to 70%-80%of EVOO.Secondly,EVOO contains approximately more than 30 phenolic compounds,of which HT is essential for the protection against cardiovascular diseases.In this review,we focused on the potential mechanisms of oleic acid and polyphenols combat cardiovascular diseases risk in terms of oxidative stress,inflammation,blood pressure,endothelial function and cholesterol.This review might provide a reference for the studies on cardiovascular protective effects of EVOO. 展开更多
关键词 Cardiovascular diseases Extra virgin olive oil Oleic acid POLYPHENOLS
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Dietary oleic acid intake,olive oil consumption,and risk of cardiovascular and all-cause mortality
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作者 Huihui Lu Buyun Liu +3 位作者 Wenjun Fu Kaiwen Ji Shuang Rong Wei Bao 《中国科学技术大学学报》 CAS CSCD 北大核心 2024年第9期45-53,69,70,共11页
Objective:Oleic acid,a subtype of monounsaturated fatty acid(MUFA),is present in abundance in certain edible oils,particularly olive oils.Epidemiological evidence concerning dietary oleic acid intake and the long-term... Objective:Oleic acid,a subtype of monounsaturated fatty acid(MUFA),is present in abundance in certain edible oils,particularly olive oils.Epidemiological evidence concerning dietary oleic acid intake and the long-term risk of mortality is lacking.This study aimed to evaluate the associations of the dietary intake of oleic acid and other specific subtypes of MUFAs,olive oil,and other vegetable oils with cardiovascular disease(CVD)and all-cause mortality.Methods:This prospective cohort study included adults aged 40 years or older who participated in the included U.S.adults National Health and Nutrition Examination Survey(NHANES).Dietary MUFA intake was assessed via 24-h dietary recall interviews in NHANES 1999–2018,and the consumption of olive oil and other vegetable oils was assessed via a food frequency questionnaire in NHANES 2003–2006.Deaths and underlying causes of death were ascertained by linkage to the National Death Index through December 31,2019.Weighted Cox proportional hazards regression models were used to estimate the hazard ratio(HR)and 95%CIs.Results:Dietary intake of total MUFAs and oleic acid was associated with a lower risk of CVD mortality,with HRs(95%CI)of 0.62(0.39–0.99)and 0.61(0.39–0.97),respectively.Total MUFA and oleic acid intake were inversely associated with all-cause mortality;the multivariable-adjusted HRs were 0.77(95%CI:0.60–0.99)and 0.78(95%CI:0.62–0.99),respectively.There was no significant association between palmitoleic acid intake and all-cause mortality.The habitual consumption of olive oil,but not the consumption of other vegetable oils,was inversely associated with the risk of cardiovascular mortality.In the joint association analysis,the HRs(95%CI)of cardiovascular mortality were 0.36(0.19–0.69)for people who exclusively consumed olive oil,0.59(0.27–1.32)for people who consumed both olive oil and other vegetable oils,and 0.73(0.46–1.14)for people who exclusively consumed other vegetable oils compared with people who never consumed vegetable oils.Conclusions:In a U.S.nationally representative prospective cohort,higher dietary oleic acid intake and olive oil consumption were associated with a lower risk of cardiovascular mortality. 展开更多
关键词 oleic acid monounsaturated fatty acid olive oil cardiovascular mortality all-cause mortality
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New insights into the combined effects of geographical origin,cultivar and crop season on the physicochemical characteristics of Moroccan olive oils produced in northern Morocco.A comparative study
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作者 Noura Issaoui Inmaculada Olivares +4 位作者 Amar Habsaoui Mohamed Ebn Touhami Adil Khtira El Hassan Sakar Sebastian Sanchez 《Oil Crop Science》 CSCD 2024年第4期255-264,共10页
The Tangier-Tetouan-Al Hoceima(TTA)region is one of the main olive oil producing regions in Morocco.Little is devoted to characterize olive oil physicochemical traits from TTA hence the originality of this study.It ai... The Tangier-Tetouan-Al Hoceima(TTA)region is one of the main olive oil producing regions in Morocco.Little is devoted to characterize olive oil physicochemical traits from TTA hence the originality of this study.It aimed at investigating variation in olive oil quality produced from three Moroccan cultivars‘Moroccan Picholine’,‘Menara’,and‘Haouzia’and their blends.Sampling was performed in five provinces fromTTA(Northern Morocco)during four consecutive crop-seasons(2018-2021)considering three extraction technologies(ET):traditional discontinuous press system(SP)and continuous extraction systems including decanter of three outlets(3O)and decanter of two outlets(2O).Physicochemical measurements consisted of routinely quality parameters namely free acidity(FA),peroxide value(PV),UV absorption parameters(K232,K270,andΔK),chlorophylls(Chl)and carotenoids(Car)contents,total phenolic compounds(TPC)and oxidative stability(OS).Crop season showed its superiority impacts on K232,OS,TPC,Chl,and OS.While cultivar was the main variability source in both PV and K270,and FA was mainly determined by ET.Important variations(p<0.05)were reported among crop seasons and locations due to pedoclimatic differences.‘Menara’and‘Haouzia’had higher pigments content,TPC,and OS,and the blends displayed low pigments concentration,TPC,and OS.Expectedly,continuous ET(2O and 3O)had the greatest values of pigments content,TPC,and OS as revealed by principal component analysis.Strong correlations were highlighted among basic quality parameters,TPC,pigments,and OS.Simple linear regression was used to describe the relationships between OS and TPC(R^(2)=0.856)and OS regressed against Chl(R^(2)=0.690)and Car(R^(2)=0.760),while TPC were regressed on Chl(R^(2)=0.670)and Car(R^(2)=0.680)and finally Chl against Car(R^(2)=0.931).In conclusion,compared to technological,genotypic,and geographic effects,climatic conditions were the main factor driving olive oil stability and associated phenolics and pigments;oil cultivar blend seems to have negative effects on pigments concentration and total phenolic compounds as well as oxidative stability. 展开更多
关键词 Moroccan cultivars olive oil Oxidative stability PIGMENTS Quality parameters Total phenolic compounds
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Thermal Decomposition of Olive-Solid Waste by TGA: Characterization and Devolatilization Kinetics under Nitrogen and Oxygen Atmospheres
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作者 Yahya H. Khraisha 《Journal of Power and Energy Engineering》 2024年第3期31-47,共17页
Despite the fact that a few countries in the Mediterranean and the Middle East have limited crude oil reserves, they have abundant biomass feedstocks. For instance, Jordan relies heavily on the importation of natural ... Despite the fact that a few countries in the Mediterranean and the Middle East have limited crude oil reserves, they have abundant biomass feedstocks. For instance, Jordan relies heavily on the importation of natural gas and crude oil for its energy needs;but, by applying thermochemical conversion techniques, leftover olive oil can be used to replace these energy sources. Understanding the chemical, physical, and thermal characteristics of raw materials is essential to obtaining the most out of these conversion processes. Thermogravimetric analysis was used in this study to examine the thermal behavior of olive-solid residue (kernel) at three different heating rates (5, 20 and 40 C/min) in nitrogen and oxygen atmospheres. The initial degradation temperature, the residual weight at 500 and 700˚C and the thermal degradation rate during the devolatilization stage (below 400˚C) were all determined. It was found that in N<sub>2</sub> and O<sub>2</sub> atmospheres, both the initial degradation temperature and the degradation rate increase with increasing heating rates. As heating rates increase in the N<sub>2</sub> atmosphere, the residual weight at 500 or 700˚C decreases slightly, but at low heating rates compared to high heating rates in the O<sub>2</sub> atmosphere, it decreases significantly. This suggests that a longer lignin oxidation process is better than a shorter one. Coats and Redfern approach was used to identify the mechanism and activation energy for the devolatilization stage of pyrolysis and oxidation reactions. The process mechanism analysis revealed that the model of first-order and second-order reactions may adequately describe the mechanism of heat degradation of the devolatilization step of olive-solid waste for pyrolysis and oxidation processes, respectively. 展开更多
关键词 Biomass olive-Solid Waste THERMOGRAVIMETRY Pyrolysis Oxidation Heating Rates Kinetics
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Analysis of Amylase and Superoxide Dismutase Isozymes During the Germination Process of Emmenopterys henryi Oliv Seeds 被引量:17
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作者 刘国勇 彭丽娟 陈发菊 《Agricultural Science & Technology》 CAS 2009年第2期6-8,19,共4页
[ Objective] The study was to understand the changes of amylase(AMY) and superoxide dismutase(SOD) isozymes during the ger- mination process of Emmenopterys henryi Oliv seeds. [ Metbod] By employing polyacrylamide... [ Objective] The study was to understand the changes of amylase(AMY) and superoxide dismutase(SOD) isozymes during the ger- mination process of Emmenopterys henryi Oliv seeds. [ Metbod] By employing polyacrylamide gel electrophoresis method, the expressions of AMY and SOD isozymes during seed germination process were analyzed. ~ Result] The main AMY bands remained strong during the whole peri- od and a new band A2 appeared in the middle and late period of seed germination. Some new SOD bands occurred at the early stage, then be- came weak or disappeared in the middle period, and band S6 became intense in the late peried. [ Conclusion.] The expression of AMY and SOD isozyme gene has temporal difference during germination of E. henryi Oliv seeds. 展开更多
关键词 Emmenopterys henryi oliv Amylase isozymes Superoxide dismutase isozyme Seed germination
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Detection and Analysis of Squalene in Oil from Olive Fruits of Different Varieties and of Different Degrees of Maturity 被引量:2
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作者 耿树香 宁德鲁 +2 位作者 张艳丽 陈海云 李勇杰 《Agricultural Science & Technology》 CAS 2013年第10期1482-1485,共4页
[Objective] This study aimed to identify the difference in squalene content among different olive varieties and the law of squalene content change in the same olive variety of different degrees of maturity, with the o... [Objective] This study aimed to identify the difference in squalene content among different olive varieties and the law of squalene content change in the same olive variety of different degrees of maturity, with the objective to provide technical support for the harvest and processing of olive fruits. [Method] Taking 13 introduced olive varieties including three varieties of eight different grades of maturity, fat acid w3s first extracted by Soxhlet extraction and then squalene was quantitatively and qualitatively analyzed by gas chromatography-mass spectrometry (GC-MS) method. [Result] The results showed that squalene content was the highest in CG-32, and the lowest in Leccino among the 13 olive varieties. And squalene content increased with the degree of maturity in the three olive varieties including CG-32, Frantoio and Ascolana Tenera. [Conclusion] A more simple and rapid method for the determina- tion of squatene content was established. 展开更多
关键词 olivE olive oil Determination of squalene content GC-MS method
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Protective Effects of Aqueous Extract of Eucommia ulmiodes Oliver Leaves on Liver Mitochondria 被引量:6
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作者 刘静 杨建雄 《Agricultural Science & Technology》 CAS 2013年第4期627-629,共3页
[Objective] This study aimed to investigate the protective effects of aqueous extract of Eucommia ulmiodes Oliver leaves (AEO) on liver mitochondrial injury induced by free radicals. [Method] MDA content was determi... [Objective] This study aimed to investigate the protective effects of aqueous extract of Eucommia ulmiodes Oliver leaves (AEO) on liver mitochondrial injury induced by free radicals. [Method] MDA content was determined by thiobarbituric acid colorimetric method; mitochondrial swelling degree was determined by spectrophotometry; the superoxide anion radical scavenging ability was determined using reduced coenzyme I-tetrazolium-phenazine methosulfate as the superoxide anion generation system. Mice were hypodermically injected in the back and neck with D- galactose, after 50 d, the effects of AEO on the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and anti-hydroxyl radicals in mouse liver were determined using kits. [Result] AEO can efficiently reduce the liver injury and inhibit mitochondrial swelling induced by Fe2+-L-Cys, which can also scavenge superoxide anion and improve the activities of antioxidant enzymes. [Conclusion] This study provided scientific basis for the development and application of AEO resources. 展开更多
关键词 Eucommia ulmiodes oliver leaves Antioxidase MITOCHONDRIA
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Introduction and Breeding of Olive Variety‘Picual' 被引量:1
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作者 李勇杰 宁德鲁 +3 位作者 贺娜 张艳丽 马婷 耿树香 《Agricultural Science & Technology》 CAS 2017年第12期2323-2325,共3页
The olive variety "Picual' is native to Jaen Province, Spain and is the main cultivar of olive. In 1979, scions were introduced into China and were grafted in Wuchang of Hubei, Chenggu of Shaanxi, Santai and Xichang... The olive variety "Picual' is native to Jaen Province, Spain and is the main cultivar of olive. In 1979, scions were introduced into China and were grafted in Wuchang of Hubei, Chenggu of Shaanxi, Santai and Xichang of Sichuan, and Kunming of Yunnan. Its fruit is oval, and the weight of a single fruit is 5.38 g. The top of fruit is rounded, and stigma exists. The base of fruit is flat. There is a mouth on the top of its fruit, and it is asymmetric. Oil content in fresh fruit is 24.69%, and oleic acid content is 77.5%; the oil quality is good. In the areas with cold winter in dry and hot valleys of the Jinsha River in Yunnan, its fruit matures in late September. In 2016, it was approved to be a good variety by Yunnan Forest Tree Variety Examination and Approving Committee. 展开更多
关键词 olivE VARIETY Picual INTRODUCTION
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Prospects Expectation for Development of Oil Olive Industry Development in China from the Domestic and Foreign Olive Oil Market 被引量:2
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作者 张正武 王兆山 张建国 《Agricultural Science & Technology》 CAS 2017年第8期1541-1547,共7页
Over the past two years, China's olive Planting area was a bumper harvest year , extra virgin olive oil production has increased at rate of 30% an annual, the government, enterprises and farmers had should be present... Over the past two years, China's olive Planting area was a bumper harvest year , extra virgin olive oil production has increased at rate of 30% an annual, the government, enterprises and farmers had should be presented to the satisfaction of all the situation. However, a large number of farmer has listed to be bought of their fresh fruit , it was presented of 'queuing for salphenomenon, fruit can not be bought and pressed in time, farmer's enthusiasm was hurt and olive oil quality was reduced. In this regard, we had a comprehensive investigation and analysis of the current problems, combined with foreign research results, to researched the domestic and foreign olive oil market, has found our country disadvantages of in oil olive industry development and the existence question, and has carried on the forecast to our country oil olive industry development. Indicated that there is a lot of demand for olive oil consumer In China, and vigorously support at all levels of government, key factors restricting the healthy development of the industry had being resolved, speeding up the development of policies, technologies, talents,markets. The development prospect of olive industry is very broad. 展开更多
关键词 olive oil Market analysis EXPECTATION
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6 Kinds of Isozymes after Long-term Subculture of Emmenopterys henryi Oliv. 被引量:5
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作者 杜景川 景丹龙 +1 位作者 陈发菊 李凤兰 《Agricultural Science & Technology》 CAS 2010年第5期22-27,共6页
[Objective] The aim was to study the changes of zymography in 6 kinds of isozymes after long-term subculture of Emmenopterys henryi Oliv.. [Method] Non-denaturing polyacrylamide gel electrophoresis was used to analyze... [Objective] The aim was to study the changes of zymography in 6 kinds of isozymes after long-term subculture of Emmenopterys henryi Oliv.. [Method] Non-denaturing polyacrylamide gel electrophoresis was used to analyze isozyme patterns such as esterase (EST),acid phosphatase (ACP),ATP enzyme (ATPase),amylase (AMY),superoxide dismutase (SOD) and peroxidase (POD) in long-term subculture callus of Emmenopterys henryi Oliv. [Result] The research showed that there were differences among the 6 kinds of isozymes in embryogenic callus and non-embryogenic callus of Emmenopterys henryi Oliv.,and both levels could be taken as the basis for identification,the EST,ACP,and POD of non-embryogenic callus were significantly higher than embryogenic callus. The browning of non-embryogenic callus was non-level in the AMY,SOD and POD isozymes when was compared with normal non-embryogenic callus,while the EST,ACP and ATPase isozymes decreased; When the browning of embryogenic callus was contrasted with normal embryogenic callus,EST isozyme increased and the other 5 kinds of enzymes decreased. [Conclusion] The study provided theoretical basis for research morphological difference and browning of long-term tissue culture of Emmenopterys henryi Oliv.. 展开更多
关键词 Emmenopterys henryi oliv. Callus Long-term subculture Isozyme Browning
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Extraction of Total DNA from Populus euphratica Oliv. and Populus pruinosa Schrenk. by Improved CTAB Method 被引量:1
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作者 司杰 黄文娟 焦培培 《Agricultural Science & Technology》 CAS 2016年第4期826-828,832,共4页
This study presented an improved CTAB method for extracting DNA from leaves of Populus euphratica Oliv. and Populus pruinosa Schrenk. based on the conventional CTAB method. The results showed that preventing DNA from ... This study presented an improved CTAB method for extracting DNA from leaves of Populus euphratica Oliv. and Populus pruinosa Schrenk. based on the conventional CTAB method. The results showed that preventing DNA from browning is a key step to obtain the high-quality DNA during DNA extraction, and under the condition of grinding in the presence of liquid nitrogen, adding such three antioxidants as PVP dry powder, Vc and β-mercaptoethanol could prevent DNA from browning effectively. The total DNA extracted by the improved CTAB method was subjected to PCR detection which proved that it totally satisfied the requirements of subsequent study. 展开更多
关键词 Populus euphratica oliv. Populus pruinosa Schrenk. BROWNING Total DNA Polymerase chain reaction(PCR)
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胡杨(Populus euphratica Oliv.)根繁殖特征 被引量:11
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作者 王永斌 努尔巴依.阿布都沙力克 Niels Thevs 《生态学杂志》 CAS CSCD 北大核心 2007年第12期1937-1941,共5页
以新疆塔里木河中游河岸北部河漫滩的胡杨幼林带为对象,从克隆生态学的角度,采用挖掘法、高压冲洗法及断根胁迫实验,研究了胡杨在资源异质环境中的风险分担、资源觅食与保持功能以及根源性克隆生长形态特征。结果表明:胡杨的地下根分枝... 以新疆塔里木河中游河岸北部河漫滩的胡杨幼林带为对象,从克隆生态学的角度,采用挖掘法、高压冲洗法及断根胁迫实验,研究了胡杨在资源异质环境中的风险分担、资源觅食与保持功能以及根源性克隆生长形态特征。结果表明:胡杨的地下根分枝类型为单轴型,同一生长方向2水平根的夹角平均约为180°,水平根与垂直根的夹角为90°~100°,水平根和垂直根的空间构型近似T形;基株的胚根周长>分株的次根周长;水平根呈侧圆台形,胡杨的2水平根之间存在着养分的传递。 展开更多
关键词 胡杨 克隆生长 觅食行为 风险分摊
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Analysis of the Correlation between the Geographical Distribution of Populus euphratica Oliv. and the Climatic Environment
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作者 杨银科 阎正龙 《Agricultural Science & Technology》 CAS 2012年第7期1450-1455,共6页
[Objective] This research was to study the correlation regional climatic characteristics and changing geographic distribution of Populus euphratica Oliv. (Salicaceae), as well as the adaption of Populus euphratica Oli... [Objective] This research was to study the correlation regional climatic characteristics and changing geographic distribution of Populus euphratica Oliv. (Salicaceae), as well as the adaption of Populus euphratica Oliv. to the climatic environment. [Method] The climatic characteristics, water source, groundwater and soil type in the distribution regions of Populus euphratica Oliv. and the effect of long-term human activities were comprehensively analyzed based an overview of Populus euphratica Oliv. and its distribution. [Result] Specific regional climatic characteristics and long term human activities are the principle determinants for the growth of Populus euphratica Oliv. The change of leaf shape is a distinct feature of Populus euphratica Oliv. in adapting to the climatic environment. Populus euphratica Oliv. withstands various environmental stresses by means of in vivo synthesis, transport and conversion of secondary phenolic metabolites. Effective protection and rehabilitation measures, and ecological water transport have obvious effect on the restoration and reconstruction of damaged ecological environment of Populus euphratica oasis. [Conclusion] This study is of great significance for the restoration of ecological environment in the arid inland regions, north-west China. 展开更多
关键词 POPULUS EUPHRATICA oliv. (Salicaceae) Geographic distribution Climatic and environmental characteristics CORRELATION ANALYSIS
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遗传质量对水青树(Tetracentron sinense Oliv.)种子特征及幼苗初期生长的影响 被引量:4
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作者 陈杨 张雪梅 +1 位作者 范曾丽 甘小洪 《西华师范大学学报(自然科学版)》 2017年第4期359-364,共6页
通过对不同授粉处理后的水青树种子特征及幼苗生长等指标进行比较分析,探讨遗传质量对水青树种子和幼苗适合度的影响。研究发现,不同授粉处理后的水青树种子的宽和厚、千粒重、饱满度,以及萌发率和发芽势均存在显著差异:来自异株异花授... 通过对不同授粉处理后的水青树种子特征及幼苗生长等指标进行比较分析,探讨遗传质量对水青树种子和幼苗适合度的影响。研究发现,不同授粉处理后的水青树种子的宽和厚、千粒重、饱满度,以及萌发率和发芽势均存在显著差异:来自异株异花授粉处理的种子的厚度、千粒重、萌发率和发芽势均明显高于自花和同株异花授粉处理,其幼苗茎的生长优于自花授粉及自然授粉的幼苗,根的生长在后期也超过了这2种处理;来自自然授粉的水青树种子的宽度、厚度和萌发率均明显低于自花授粉和同株异花授粉处理,而其长度、千粒重、发芽势等指标均与自花授粉处理的种子没有明显区别。结果表明:种子遗传质量显著影响水青树种子和幼苗的适合度,异株异花授粉后的种子和幼苗的适合度最高。自然生境中水青树的自交生殖策略可能与其恶劣的环境条件(其花期与雨季重合)和种群密度过小有关。 展开更多
关键词 水青树 遗传质量 种子 幼苗 适合度
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改进Oliver-Pharr法在铁电单晶纳米压痕中的应用 被引量:1
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作者 张伟光 李继军 +2 位作者 杨诗婷 侯小虎 邢永明 《辽宁工程技术大学学报(自然科学版)》 CAS 北大核心 2022年第1期79-84,共6页
为解决传统Oliver-Pharr法无法给出接触刚度随压入深度的连续变化关系问题,考虑塑性压痕与周围弹性基体间残余接触应力之间影响,引入虚拟载荷,提出改进Oliver-Pharr法.该方法可连续确定接触刚度,不需要对压头的面积函数进行预先校正.将... 为解决传统Oliver-Pharr法无法给出接触刚度随压入深度的连续变化关系问题,考虑塑性压痕与周围弹性基体间残余接触应力之间影响,引入虚拟载荷,提出改进Oliver-Pharr法.该方法可连续确定接触刚度,不需要对压头的面积函数进行预先校正.将该方法应用到PIN-PMN-PT铁电单晶纳米压痕实验数据分析中,计算了其接触刚度、弹性模量及硬度,并与连续刚度测量法的测量结果进行了比较.研究结果表明:该方法的计算结果与连续刚度测量法的测量结果吻合度高,改进Oliver-Pharr法有效可行. 展开更多
关键词 纳米压痕 改进的oliver-Pharr方法 PIN-PMN-PT铁电单晶 接触刚度 弹性模量 硬度
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Evaluation of Drought Resistance of Olive Varieties from Different Provenances
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作者 李勇杰 张艳丽 +5 位作者 宁德鲁 贺娜 陈芳 耿树香 陈海云 毛云玲 《Agricultural Science & Technology》 CAS 2014年第11期1905-1907,共3页
In order to study olive’s drought resistance in Yunnan province, different varieties of olive trees from Albania, Italy, Spain and Greece were cultured, and leaves from these trees in drought season and rainy season ... In order to study olive’s drought resistance in Yunnan province, different varieties of olive trees from Albania, Italy, Spain and Greece were cultured, and leaves from these trees in drought season and rainy season were col ected and determined by physiological indices, such as proline content, relative electric con-ductivity, binding water/free water, relative water content and malon-dialdehyde in leaves. The evaluation of drought resistance with subordinate function showed that:There were no significant differences among drought resistances of varieties and provenances. The change of physiological indices in different varieties showed differ-ent ranges. The drought resistance of seven varieties decreased in order as fol ows:Koroneiki〉 Picual〉 Berat〉 Kaliniot〉 Frantoio〉 Coratina〉 Arbequina. 展开更多
关键词 Provenance olive Physiological indices Drought resistance
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Olive动态心电图分析系统临床使用报告
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作者 陈国伟 梁耀荣 《现代医学仪器与应用》 1991年第4期23-24,共2页
关键词 olive动态心电图 分析系统 监测
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