维普中文期刊产品整合服务
1774篇 您的检索式:作者名="Adel"
    题名 作者 年代 出处 被引量
1Constructions: A new theoretical approach to language显示文摘A new theoretical approach to language has emerged in the past 10-15 years that allows linguistic observations about form-meaning pairings constructions — to be stated directly. Constructionist approaches aim to account for the full range of facts about language, without assuming that a particular subset of the data is part of a privileged 揷ore? Researchers argue that unusual constructions shed light on more general issues, and serve to illuminate what is required for a complete account of language.Adele E. Goldberg (Linguistics Department, University of Illinois, Urbana, IL 61801-0168, USA) 2003外国语2003,26,3:165
2Modeling sustainability:population,inequality,consumption,and bidirectional coupling of the Earth and Human Systems显示文摘Over the last two centuries,the impact of the Human System has grown dramatically,becoming strongly dominant within the Earth System in many diferent ways.Consumption,inequality,and population have increased extremely fast,especially since about 1950,threatening to overwhelm the many critical functions and ecosystems of the Earth System.Changes in the Earth System,in turn,have important feedback efects on the Human System,with costly and potentially serious consequences.However,current models do not incorporate these critical feedbacks.We argue that in order to understand the dynamics of either system,Earth System Models must be coupled with Human System Models through bidirectional couplings representing the positive,negative,and delayed feedbacks that exist in the real systems.In particular,key Human System variables,such as demographics,inequality,economic growth,and migration,are not coupled with the Earth System but are instead driven by exogenous estimates,such as United Nations population projections.his makes current models likely to miss important feedbacks in the real Earth–Human system,especially those that may result in unexpected or counterintuitive outcomes,and thus requiring diferent policy interventions from current models.he importance and imminence of sustainability challenges,the dominant role of the Human System in the Earth System,and the essential roles the Earth System plays for the Human System,all call for collaboration of natural scientists,social scientists,and engineers in multidisciplinary research and modeling to develop coupled Earth–Human system models for devising efective science-based policies and measures to beneit current and future generations.Safa Motesharrei Jorge Rivas Eugenia Kalnay Ghassem R.Asrar Antonio J.Busalacchi Robert F.Cahalan Mark A.Cane Rita R.Colwell Kuishuang Feng Rachel S.Franklin Klaus Hubacek Fernando Miralles-Wilhelm Takemasa Miyoshi Matthias Ruth Roald Sagdeev Adel Shirmohammadi Jagadish Shukla Jelena Srebric Victor M.Yakovenko Ning Zeng 2016National Science Review2016,3,4:34
3Relationship between acrosin activity of human spermatozoa and oxidative stress显示文摘Aim: To study the association between seminal oxidative stress and human sperm acrosin activity.Methods: It is a prospective study consisting of 30 infertile men and 12 fertile normozoospermic volunteers. A full history, clinical examination and scrotal ultrasound were done to exclude other related factors such as smoking and varicocele. Presence of white blood cells (WBCs) in semen samples was evaluated by peroxidase staining. Lipid peroxidation in spermatozoa was induced after incubating with ferrous sulphate (4mmol/L) and sodium ascorbate (20 mmol/L). Induced peroxidation of spermatozoa was assessed by determining the production of thiobarbituric acid reactive substances (TBARS). Acrosin activity was measured using the gelatinolysis technique. The halo diameters around the sperm heads and the percentages of spermatozoa showing halo formation were evaluated. An acrosin activity index was calculated by multiplying the halo diameter by the halo formation rate. Results: A significant difference was observed in acrosin activity parameters and TBARS levels between samples with WBCs (>1×10^6/mL of ejaculate) and those without. This difference was also noted between the normozoospermic and the oligoasthenoteratozoospermic semen samples. The TBARS production by spermatozoa had a significant negativecorrelation with the acrosin activity index (r=-0.89, P<0.001). Conclusion: The presence of oxidative stress in an individual with leukocytospermia and/or abnormal semen parameters is associated with impaired sperm function as measured by its acrosin activity. (Asian J Androl 2004 Dec; 6:313-318)Adel A.Zalata Ashraf H.Ahmed Shyam S.R.Allamaneni Frank H.Comhaire Ashok Agarwal 2004Asian Journal of Andrology2004,6,4:27
4混合动力离合器结合过程的动态转矩控制策略显示文摘混合动力通过电动机和发动机两种动力源驱动车辆运行,两种动力源之间的切换对整车的动力性和驾驶性有着重要的影响。在客车用单轴并联式混合动力系统的基础上,针对混合动力系统两个动力源响应性差异而造成的整车纵向加速度冲击,以纯电动模式切换到纯发动机模式和混合驱动模式的过渡过程为研究重点,提出离合器结合过程的动态转矩控制策略,即在离合器结合之前和结合过程中,采用发动机转速自适应模糊比例积分微分(Proportional-integral-differential,PID)闭环控制跟随电动机转速;在离合器结合后,利用电动机补偿发动机动态转矩,并且在混合动力系统台架上对提出的动态控制策略进行验证。试验结果表明,PID所提出的离合器结合过程的动态转矩控制策略改善了整车纵向冲击度,提高整车的驾驶性能,为进一步的整车试验奠定基础。倪成群 张幽彤 赵强 BOUKEHILI Adel 2013机械工程学报2013,49,4:27
5MicroRNAs as possible biomarkers for diagnosis and prognosis of hepatitis b- and c-related-hepatocellularcarcinoma显示文摘Aim of the present review is to summarize the current knowledge about the potential relationship between mi RNAs and hepatitis B virus(HBV)-hepatitis C virus(HCV) related liver diseases. A systematic computerbased search of published articles, according to the Preferred Reporting Items for Systematic reviews and Meta-Analysis Statement, was performed to identify relevant studies on usefulness of serum/plasma/urine mi RNAs, as noninvasive biomarkers for early detection of HBV and HCV-induced hepatocellular carcinoma(HCC) development, as well as for its prognostic evaluation. The used Medical Subject Headings terms and keywords were: 'HBV', 'HCV', 'hepatocellular carcinoma', 'micro RNAs', 'mi RNAs', 'diagnosis', 'prognosis', 'therapy', 'treatment'. Some serum/plasma mi RNAs, including mi R-21, mi R-122, mi-125a/b, mi R-199a/b, mi R-221, mi R-222, mi R-223, mi R-224 might serve as biomarkers for early diagnosis/prognosis of HCC, but, to date, not definitive results or well-defined panels of mi RNAs have been obtained. More well-designed studies, focusing on populations of different geographical areas and involving larger series of patients, should be carried out to improve our knowledge on the potential role of mi RNAs for HCC early detection and prognosis.Sirio Fiorino Maria Letizia Bacchi-Reggiani Michela Visani Giorgia Acquaviva Adele Fornelli Michele Masetti Andrea Tura Fabio Grizzi Matteo Zanello Laura Mastrangelo Raffaele Lombardi Luca Di Tommaso Arrigo Bondi Sergio Sabbatani Andrea Domanico Carlo Fabbri Paolo Leandri Annalisa Pession Elio Jovine Dario de Biase 2016World Journal of Gastroenterology2016,22,15:25
6A review of the roles of forest canopy gaps显示文摘Treefall gap, canopy opening caused by the death of one or more trees, is the dominant form of disturbance in many forest systems worldwide. Gaps play an important role in forest ecology helping to preserve bio- and pedo-diversity, influencing nutrient cycles, and maintaining the complex structure of the late-successional forests. Over the last 30 years, numerous reviews have been written describing gap dynamics. Here we synthesize current understanding on gap dynamics relating to tree regeneration with particular emphasis on gap characteristics considered critical to develop ecologically sustainable forest management systems and to conserve native biodiversity. Specifically, we addressed the question: how do gaps influence forest structure? From the literature reviewed, the size of gaps induces important changes in factors such as light intensity, soil humidity and soil biological properties that influence tree species regeneration and differ in gaps of different sizes. Shadetolerant species can colonize small gaps; shade-intolerant species need large gaps for successful regeneration. Additionally, gap dynamics differ between temperate, boreal, and tropical forests, showing the importance of climate differences in driving forest regeneration. This review summarizes information of use to forest managers who design cutting regimes that mimic natural disturbances and who must consider forest structure, forest climate, and the role of natural disturbance in their designs.Adele Muscolo Silvio Bagnato Maria Sidari Roberto Mercurio 2014Journal of Forestry Research2014,25,4:22
7Low-dose tacrolimus ameliorates liver inflammation and fibrosis in steroid refractory autoimmune hepatitis显示文摘AIM: To determine the eff icacy of tacrolimus on clinical status, histopathological status and biochemical markers in patients with steroid refractory autoimmune hepatitis (AIH). METHODS: Retrospectively, clinical parameters, biochemistry and histology were obtained from patient records. RESULTS: Nine patients [8 females/1 male, median age 32 (range 16-64) years] were identified to have received tacrolimus for a median duration of 18 (12-37) mo. Before initiation of tacrolimus treatment the patients were maintained on a prednisolone dose of 20 mg daily (range 20-80 mg/d), which was tapered to 7.5 (5-12.5) mg/d (P = 0.004). Alanine aminotransferase and immunoglobulin-G concentrations decreased from 154 (100-475) to 47(22-61) U/L (P = 0.007), and from 16 (10-30.2) to 14.5 (8.4-20) g/L (P = 0.032), respectively. All patients showed improvement of the liver inflammatory activity, as determined by the Ishak score (P = 0.016), while the degree of f ibrosis tended to decrease (P = 0.049). CONCLUSION: The use of low dose tacrolimus can lead to biochemical and histologic improvement of inflammation with no progression of the stage of f ibrosis in patients with steroid refractory AIH. Low dose tacrolimus therapy also allows substantial reduction of prednisone dose.Fin Stolze Larsen Ben Vainer Martin Eefsen Peter Nissen Bjerring Bent Adel Hansen 2007World Journal of Gastroenterology2007,13,23:15
8Modeling and Analysis of Mechanization Projects of Wheat Production by GERT Networks显示文摘In crop production systems,all operations such as seed bed preparation,etc.,must be accomplished on time,if yield reduction and low quality product are to be avoided.Therefore all operations in mechanized cropping projects require precise scheduling,planning and management.The basic approach in all scheduling techniques is to form a network of activities and events relationships that graphically portrays the sequential relations between the tasks in a project.Such a network would as a powerful tool available a farm manager to plan,schedule,monitor and control a project.Since GERT(Graphical Evaluation and Review Technique) networks have most of advantages associated with networks and available system analyst in exact evaluation of certain types of networks,in this research it was used and mechanized wheat production system was simulated,modeled and analyzed.Critical activities,events and path were determined.Results showed that the network model was able to answer any statistic questions concerning with the project.Network models,particularly GERT networks are increasingly powerful tool for modeling,scheduling,planning,controlling,and analyzing of agricultural mechanization projects.Reza Abdi Hamid Reza Ghasemzadeh Shamsollah Abdollahpour Majid Sabzeparvar Adel Dabbag Mohamadi Nasab 2010Agricultural Sciences in China2010,9,7:14
9Hepatitis B and C virus-induced hepatitis: Apoptosis, autophagy, and unfolded protein response显示文摘AIM: To investigate the co-incidence of apoptosis, autophagy, and unfolded protein response(UPR) in hepatitis B(HBV) and C(HCV) infected hepatocytes.METHODS: We performed immunofluorescence confocal microscopy on 10 liver biopsies from HBV and HCV patients and tissue microarrays of HBV positive liver samples. We used specific antibodies for LC3β, cleaved caspase-3, BIP(GRP78), and XBP1 to detect autophagy, apoptosis and UPR, respectively. AntiHCV NS3 and anti-HBs antibodies were also used to confirm infection. We performed triple blind counting of events to determine the co-incidence of autophagy(LC3β punctuate), apoptosis(cleaved caspase-3), and unfolded protein response(GRP78) with HBV and HCV infection in hepatocytes. All statistical analyses were performed using SPSS software for Windows(Version 16 SPSS Inc, Chicago, IL, United States). P-values < 0.05 were considered statistically significant. Statistical analyses were performed with Mann-Whitney test to compare incidence rates for autophagy, apoptosis, and UPR in HBV- and HCV-infected cells and adjacent noninfected cells.RESULTS: Our results showed that infection of hepatocytes with either HBV and HCV induces significant increase(P < 0.001) in apoptosis(cleavage of caspase-3), autophagy(LC3β punctate), and UPR(increase in GRP78 expression) in the HCV- and HBVinfected cells, as compared to non-infected cells of the same biopsy sections. Our tissue microarray immunohistochemical expression analysis of LC3β in HBV^(Neg) and HBV^(Pos) revealed that majority of HBVinfected hepatocytes display strong positive stainingfor LC3β. Interestingly, although XBP splicing in HBVinfected cells was significantly higher(P < 0.05), our analyses show a slight increase of XBP splicing was in HCV-infected cells(P > 0.05). Furthermore, our evaluation of patients with HBV and HCV infection based on stage and grade of the liver diseases revealed no correlation between these pathological findings and induction of apoptosis, autophagy, and UPR.CONCLUSION: The results of this study indicate that HCV and HBV infection activates apoptosis, autophagy and UPR, but slightly differently by each virus. Further studies are warranted to elucidate the interconnections between these pathways in relation to pathology of HCV and HBV in the liver tissue.Behzad Yeganeh Adel Rezaei Moghadam Javad Alizadeh Emilia Wiechec Seyed Moayed Alavian Mohammad Hashemi Bita Geramizadeh Afshin Samali Kamran Bagheri Lankarani Martin Post Payam Peymani Kevin M Coombs Saeid Ghavami 2015World Journal of Gastroenterology2015,21,47:13
10Dynamics of CO_2 Emission and Biochemical Properties of a Sandy Calcareous Soil Amended with Conocarpus Waste and Biochar显示文摘Biochar is a carbon-rich product obtained by biomass pyrolysis and considered a mean of carbon sequestration. In this research, a sandy calcareous soil from the Farm of the College of Food & Agriculture Sciences, King Saud University, Saudi Arabia, was amended with either woody waste of Conocarpus erectus L.(CW) or the biochar(BC) produced from CW at rates of 0(control), 10, 30 and 50 g kg-1. The effects of the amendments on soil p H, dissolved organic carbon(DOC), microbial biomass carbon(MBC), CO2 emission and metabolic quotient(q CO2) of the sandy calcareous soil were studied in a 60-d incubation experiment. The results showed that the addition of CW led to a significant decrease in soil p H compared to the control and the addition of BC. The CO2-C emission rate was higher in the first few days of incubation than when the incubation time progressed. The cumulative CO2-C emission from the soil amended with CW, especially at higher rates, was higher(approximately 3- to 6-fold) than that from the control and the soil amended with BC. The BC-amended soil showed significant increases in CO2-C emission rate during the first days of incubation as compared to the non-amended soil, but the increase in cumulative CO2-C emission was not significant after 60 d of incubation. On the other hand, CW applications resulted in considerably higher cumulative CO2-C emission, MBC and DOC than the control and BC applications. With the exception of 0 day(after 1 h of incubation), both CW and BC applications led to lower values of q CO2 as compared to the control. The power function kinetic model satisfactorily described the cumulative CO2-C emission. Generally, the lowest values of CO2 emission were observed in the soil with BC, suggesting that the contribution of BC to CO2 emission was very small as compared to that of CW.Mohamed EL-MAHROUKY Ahmed Hamdy EL-NAGGAR Adel Rabie USMAN Mohammad Al-WABEL 2015Pedosphere2015,25,1:11
11Kaempferol attenuates cognitive deficit via regulating oxidative stress and neuroinflammation in an ovariectomized rat model of sporadic dementia显示文摘Alzheimer's disease(AD) is associated with oxidative stress, and ultimately results in cognitive deficit. Despite existing literature on the pathophysiology of AD, there is currently no cure for AD. The present study investigated the effects of kaempferol(Kmp) isolated from the extract of Mespilus germanica L.(medlar) leaves on cognitive impairment, hippocampal antioxidants, apoptosis, lipid peroxidation and neuro-inflammation markers in ovariectomized(OVX) rat models of sporadic AD. Kaempferol, as the main flavonoid of medlar extract has been previously known for anti-oxidative, anti-inflammatory and anti-neurotoxic effects. Thirty-two female Wistar rats were ovariectomized, and randomly divided into four groups: sham, OVX + saline, OVX + streptozotocin(STZ) + saline, OVX + STZ + Kmp. Animals received intracerebroventricular injection of STZ(3 mg/kg, twice with one day interval) to establish models of sporadic AD. Intraperitoneal injection of Kmp(10 mg/kg) for 21 days was performed in the OVX + STZ + Kmp group. Spatial learning and memory of rats were evaluated using a Morris water maze. Finally, brain homogenates were used for biochemical analysis by enzyme-linked immunosorbent assay. The results showed a significant improvement in spatial learning and memory as evidenced by shortened escape latency and searching distance in Morris water maze in the OVX + STZ + Kmp group compared with the OVX + STZ group. Kmp also exhibited significant elevations in brain levels of antioxidant enzymes of superoxide dismutase and glutathione, while reduction in tumor necrosis factor-α and malondialdehyde. Our results demonstrate that Kmp is capable of alleviating STZ-induced memory impairment in OVX rats, probably by elevating endogenous hippocampal antioxidants of superoxide dismutase and glutathione, and reducing neuroinflammation. This study suggests that Kmp may be a potential neuroprotective agent against cognitive deficit in AD.Somayeh Kouhestani Adele Jafari Parvin Babaei 2018Neural Regeneration Research2018,13,10:11
12Production of global land cover data-GLCNMO显示文摘Global land cover is one of the fundamental contents of Digital Earth.The Global Mapping project coordinated by the International Steering Committee for Global Mapping has produced a 1-km global land cover datasetGlobal Land Cover by National Mapping Organizations.It has 20 land cover classes defined using the Land Cover Classification System.Of them,14 classes were derived using supervised classification.The remaining six were classified independently:urban,tree open,mangrove,wetland,snow/ice,andwater.Primary source data of this land cover mapping were eight periods of 16-day composite 7-band 1-km MODIS data of 2003.Training data for supervised classification were collected using Landsat images,MODIS NDVI seasonal change patterns,Google Earth,Virtual Earth,existing regional maps,and expert’s comments.The overall accuracy is 76.5%and the overall accuracy with the weight of the mapped area coverage is 81.2%.The data are available from the Global Mapping project website(http://gffzzdeb47a470fc54296hqc60xcu9955p6bqw.ffgz.tsg.suse.edu.cn/).TheMODISdata used,land cover training data,and a list of existing regional maps are also available from the CEReS website.This mapping attempt demonstrates that training/validation data accumulation from different mapping projects must be promoted to support future global land cover mapping.Ryutaro Tateishi Bayaer Uriyangqai Hussam Al-Bilbisi Mohamed Aboel Ghar Javzandulam Tsend-Ayush Toshiyuki Kobayashi Alimujiang Kasimu Nguyen Thanh Hoan Adel Shalaby Bayan Alsaaideh Tsevenge Enkhzaya Gegentana Hiroshi P.Sato 2011International Journal of Digital Earth2011,4,1:11
13Tumor necrosis factor-alpha -308G/A polymorphism and risk of hepatocellular carcinoma in hepatitis C virus-infected patients显示文摘Tumor necrosis factor-alpha (TNF-α) is an important cytokine in generating an immune response against infection with hepatitis C virus (HCV). The functions of TNF-α may be altered by single-nucleotide polymorphisms (SNPs) in its gene structure. We hypothesized that SNPs in TNF-α may be important in determining the outcome of an HCV infection. To test this hypothesis, we investigated the role of the polymorphism -308G/A, which is located in the promoter region of the TNF-α gene, in the progression of HCV infection in Egyptian patients using a quantitative real-time polymerase chain reaction (qRT-PCR). The distribution of this polymorphism and its impact on the serum level of TNF-α was compared between 90 HCV-infected patients [45 with HCV-induced cirrhosis and 45 with HCV-related hepatocellular carcinoma (HCC)] and 45 healthy Egyptian volunteers without any history of liver disease. Our results showed that at the TNF-α -308 position, the G/G allele was most common (78.5% ) in the study population, with the G/A and A/A alleles occurring less frequently (13.3% and 8.1% , respectively). Frequencies of G/G, G/A, and A/A genotypes were 87%, 7%, and 6% in patients with liver cirrhosis and were 94% , 4% , and 2% in patients with HCC, respectively. Serum levels of TNF-α were significantly higher in HCV-infected patients than in healthy controls, indicating that the TNF-α -308 polymorphism does not influence the production of TNF-α. The serum level of TNF-α was positively correlated with HCV infection. Taken together, these findings suggest that the TNF-α -308 polymorphism may not be a host genetic factor associated with the severity of HCV infection, but may be an independent risk factor for HCC.Roba M.Talaat Ahmed A.Esmail Reda Elwakil Adel A.Gurgis Mahmoud I.Nasr 2012Chinese Journal of Cancer2012,31,1:9
14w显示文摘一系列新 2,5-disubstituted-1,3,4-oxadiazole 和 1,2,4-triazole 衍生物被酸一种肺结核特效药的 heterocyclization 综合 1 和 thiosemicarbazide 衍生物 2。而且,非循环的 C-nucleoside 类似物被反应被他们的相应的糖 hydrazones 的环合与醋性的酐准备。准备混合物的抗菌剂活动被评估,一些综合混合物对真菌揭示了好活动。EI-Sayed, Wael A. Ali, Omar M Hendy, Hend A AbdeI-Rahman, Adel A.-H.t 2012Chinese Journal of Chemistry2012,30,1:9
15施用不同配比蚯蚓粪对海南耕地砖红壤肥力特性的影响显示文摘为研究蚯蚓粪对砖红壤的培肥和改良效果,采用海南耕地砖红壤为材料进行室内培养试验,按照蚯蚓粪与干土的质量比分别设置为CK(0)、V1(1∶11)、V2(1∶5)、V3(1∶3)和V4(1∶2),共5个处理,培养52 d后,分别测定各处理土壤的p H值、全氮、全磷、全钾、碱解氮、速效磷、速效钾、有效钠、有效镁和有效钙的含量。结果表明,砖红壤p H值提高0.77~1.64个单位;全磷、全钾、碱解氮和速效磷含量均随蚯蚓粪添加量的增加显著提高(P<0.05),其中全磷和全钾较CK分别增加0.88~3.22倍和1.67~2.65倍,碱解氮和速效磷含量的最大增加量分别为1.66和10.7倍。V1处理土壤全氮和有效钠含量低于CK,随蚯蚓粪添加量的增多,V4处理土壤全氮和有效钠含量较CK分别增加3.43倍和66.19%;V1和V2处理速效钾含量低于CK,V3和V4处理分别高于CK 6.9%和14.9%;但蚯蚓粪添加量对土壤有效镁含量的影响差异不显著。因此,蚯蚓粪作为有机肥料施入砖红壤,可以提高砖红壤p H,砖红壤全态和有效养分含量随添加量的提高而增加,对于砖红壤地区培肥地力和改良土壤具有重要的实用价值。单颖 赵凤亮 邹刚华 李玮 Adel M R A Abdelaziz 2017华北农学报2017,32,A01:8
16The aflatoxin B1 isolating potential of two lactic acid bacteria显示文摘Objective:To determine lactic acid bacteria's capability to enhance the process of binding and isolating aflatoxin B1 and to utilize such lactic acid bacteria as a food supplement or probiotic products for preventing absorption of aflatoxin Bl in human and animal bodies.Methods:In the present research,the bacteria were isolated from five different sources.For surveying the capability of the bacteria in isolating aflatoxin Bl,ELISA method was implemented,and for identifying the resultant strains through 16S rRNA sequencing method,universal primers were applied.Results:Among the strains which were isolated,two strains of Lactobacillus pentosus and Lactobacillus beveris exhibited the capability of absorbing and isolating aflatoxin Bl by respectively absorbing and discharging 17.4%and 34.7%of the aforementioned toxin existing in the experiment solution.Conclusions:Strains of Lactobacillus pentosus and Lactobacillus beveris were isolated from human feces and local milk samples,respectively.And both strains has the ability to isolate or bind with aflatoxin Bl.Adel Hamidi Reza Mirnejad Emad Yahaghi Vahid Behnod Ali Mirhosseini Sajad Amani Sara Sattari Ebrahim Khodaverdi Darian 2013Asian Pacific Journal of Tropical Biomedicine2013,3,9:8
17Aging Effects of Organic and Inorganic Fertilizers on Phosphorus Fractionation in a Calcareous Sandy Loam Soil显示文摘In most arid and semiarid soils, naturally occurring phosphorus(P) is a major yield-limiting plant nutrient. In this study, to investigate the effects of organic(OP) and inorganic P(IP) sources on P fractionation, a calcareous sandy loam alkaline soil was fertilized with OP and IP fertilizers at low(80 mg P kg^(-1) soil) and high(160 mg P kg^(-1) soil) application rates. Three combinations of OP and IP(i.e., 75% OP + 25% IP, 50% OP + 50% IP, and 25% OP + 75% IP) were applied at low and high application rates,respectively, followed by soil aging for 21 d. Soil samples were collected after 1, 2, 3, 7, and 21 d and subjected to sequential extraction to analyze soluble and exchangeable, Fe-and Al-bound, Ca-bound, and residual P fractions. The soluble and exchangeable P fraction significantly increased up to 24.3%, whereas the Ca-bound fraction decreased up to 40.7% in the soils receiving 75% OP + 25% IP and 50% OP + 50% IP, respectively, compared with the control(receiving no P fertilizer). However, the transformation of P fractions was influenced by aging time. Addition of P sources caused instant changes in different P fractions, which then tended to decline with aging time. Change in soil p H was the limiting factor in controlling P availability. At high application rate, the OP source significantly increased soil P availability compared with the IP source with soil aging. Depending on P fractionation, a proper combination of OP and IP fertilizers, as long-term slow and instant P-releasing sources for plant uptake, respectively, may be a sustainable strategy to meet crop P requirements in the arid and semiarid soils.Munir AHMAD Mahtab AHMAD Ahmed H.EL-NAGGAR Adel R.A.USMAN Adel ABDULJABBAR Meththika VITHANAGE Jamal ELFAKI Abdulelah AL-FARAJ Mohammad I.AL-WABEL 2018Pedosphere2018,28,6:8
18Conocarpus Biochar Induces Changes in Soil Nutrient Availability and Tomato Growth Under Saline Irrigation显示文摘Thermally modified organic materials commonly known as biochar have gained popularity of being used as a soil amendment.Little information, however, is available on the role of biochar in alleviating the negative impacts of saline water on soil productivity and plant growth. This study, therefore, was conducted to investigate the effects of Conocarpus biochar(BC) and organic farm residues(FR) at different application rates of 0.0%(control), 4.0% and 8.0%(weight/weight) on yield and quality of tomatoes grown on a sandy soil under drip irrigation with saline or non-saline water. The availability of P, K, Fe, Mn, Zn and Cu to plants was also investigated. The results demonstrated clearly that addition of BC or FR increased the vegetative growth, yield and quality parameters in all irrigation treatments. It was found that salt stress adversely affected soil productivity, as indicated by the lower vegetative growth and yield components of tomato plants. However, this suppressing effect on the vegetative growth and yield tended to decline with application of FR or BC, especially at the high application rate and in the presence of biochar. Under saline irrigation system, for instance, the total tomato yield increased over the control by 14.0%–43.3% with BC and by 3.9%–35.6% with FR. These could be attributed to enhancement effects of FR or BC on soil properties, as indicated by increases in soil organic matter content and nutrient availability. Therefore, biochar may be effectively used as a soil amendment for enhancing the productivity of salt-affected sandy soils under arid conditions.Adel Rabie A.USMAN Mohammad I.AL-WABEL Yong S.OK Abdulaziz AL-HARBI Mahmoud WAHB-ALLAH Ahmed Hamdy EL-NAGGAR Mahtab AHMAD Abdulelah AL-FARAJ Abdulrasoul AL-OMRAN 2016Pedosphere2016,26,1:8
19PHF8 is a histone H3K9me2 demethylase regulating rRNA synthesis显示文摘histone H3 离氨酸 9 的 Dimethylation (H3K9me2 ) 是与抄写压抑联系的一个重要 epigenetic 标记。这里,我们识别了 PHF8, JmjC-domain-containing 蛋白质,为这个镇压标记特定的 histone demethylase。Recombinant 全身的野类型蛋白质能把 methylation 从 H3K9me2 移开,但是到丙氨酸 H247A 的保存 histidine 的变化废除 demethylase 活动。Overexpressed 外长的 PHF8 是 colocalized, B23 染色。内长的 PHF8 也是有 B23 和 fibrillarin 的 colocalized,二生长得很好的核蛋白质,建议那 PHF8 在核是局部性的并且可以调整 rRNA 抄写。确实, PHF8 跳了到 rDNA 基因的倡导者区域。减少的 PHF8 击倒 rRNA 的表示,和基因的 overexpression 导致了 rRNA 的 upregulation 抄本。附随地, H3K9me2 水平在 PHF8 击倒的房间在 rDNA 基因的倡导者区域被提高并且当野类型然而并非催化地不活跃的 H247A 变异的 PHF8 是 overexpressed 时,显著地减少了。因此,我们的学习为调整 rRNA 抄写的 H3K9me2 识别了 histone demethylase。Ziqi Zhu Yanru Wang Xia Li Yiqin Wang Longyong Xu Xiang Wang Tianliang Sun Xiaobin Dong Lulu Chen Hailei Mao Yi Yu Jingsong Li Pin Adele Chen Charlie Degui Chen 2010Cell Research2010,20,7:7
20Corneal collagen crosslinking in keratoconus and other eye disease显示文摘Keratoconus is a condition characterized by biomechanical instability of the cornea, presenting in a progressive, asymmetric and bilateral way. Corneal collagen crosslinking(CXL) with riboflavin and Ultraviolet-A(UVA) is a new technique of corneal tissue strengthening that combines the use of riboflavin as a photo sensitizer and UVA irradiation. Studies showed that CXL was effective in halting the progression of keratoconus over a period of up to four years. The published studies also revealed a reduction of max K readings by more than 2 D, while the postoperative spherical equivalent(SEQ) was reduced by an average of more than 1 D and refractive cylinder decreased by about1 D. The major indication for the use of CXL is to inhibit the progression of corneal ecstasies, such as keratoconus and pellucid marginal degeneration. CXL may also be effective in the treatment and prophylaxis of iatrogenic keratectasia, resulting from excessively aggressive photo ablation. This treatment has been used to treat infectious corneal ulcers with apparent favorable results. Most recent studies demonstrate the beneficial impact of CXL for iatrogenic ecstasies, pellucid marginal degeneration, infectious keratitis, bullous keratopathy and ulcerative keratitis. Several long-term and short-term complications of CXL have been studied and documented. The possibility of a secondary infection after the procedure exists because the patient is subject to epithelial debridement and the application of a soft contact lens. Formation of temporary corneal haze,permanent scars, endothelial damage, treatment failure,sterile infiltrates, bullous keratopathy and herpes reactivation are the other reported complications of this procedure.Adel Alhayek Pei-Rong Lu 2015International Journal of Ophthalmology(English edition)2015,8,2:7
返回顶部 每页显示:
共89页 首页 上一页 第1页 下一页 末页 /89 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费