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Seo, Kyoung-In,Lee, Jae-Hoon,Nezames, Cynthia D.,Zhong, Shangwei,Song, Eunyoung,Byun, Myung-Ok,Deng, Xing Wang American Society of Plant Biologists 2014 The Plant cell Vol.26 No.2
<P>Members of the DDB1-CUL4-associated factors (DCAFs) family directly bind to DAMAGED DNA BINDING PROTEIN1 (DDB1) and function as the substrate receptors in CULLIN4-based E3 (CUL4) ubiquitin ligases, which regulate the selective ubiquitination of proteins. Here, we describe a DCAF protein, ABD1 (for ABA-hypersensitive DCAF1), that negatively regulates abscisic acid (ABA) signaling in Arabidopsis thaliana. ABD1 interacts with DDB1 in vitro and in vivo, indicating that it likely functions as a CUL4 E3 ligase substrate receptor. ABD1 expression is induced by ABA, and mutations in ABD1 result in ABA- and NaCl-hypersensitive phenotypes. Loss of ABD1 leads to hyperinduction of ABA-responsive genes and higher accumulation of the ABA-responsive transcription factor ABA INSENSITIVE5 (ABI5), hypersensitivity to ABA during seed germination and seedling growth, enhanced stomatal closure, reduced water loss, and, ultimately, increased drought tolerance. ABD1 directly interacts with ABI5 in yeast two-hybrid assays and associates with ABI5 in vivo by coimmunoprecipitation, and the interaction was found in the nucleus by bimolecular fluorescence complementation. Furthermore, loss of ABD1 results in a retardation of ABI5 degradation by the 26S proteasome. Taken together, these data suggest that the DCAF-CUL4 E3 ubiquitin ligase assembled with ABD1 is a negative regulator of ABA responses by directly binding to and affecting the stability of ABI5 in the nucleus.</P>
Shi, Hui,Zhong, Shangwei,Mo, Xiaorong,Liu, Na,Nezames, Cynthia D.,Deng, Xing Wang American Society of Plant Biologists 2013 The Plant cell Vol.25 No.10
<P>This study identifies the LONG HYPOCOTYL IN FAR-RED1 (HFR1)– PHYTOCHROME-INTERACTING FACTOR 1 (PIF1) pair as the central transcriptional regulatory module for rapid light-initiated transcriptome changes in imbibed seeds. HFR1 interacts with PIF1 to prevent PIF1 from binding to DNA, promoting light-initiated germination. The functionally antagonistic HFR1–PIF1 pair constructs a fail-safe mechanism for fine-tuning seed germination under low-level illumination.</P>
The PP6 Phosphatase Regulates ABI5 Phosphorylation and Abscisic Acid Signaling in <i>Arabidopsis</i>
Dai, Mingqiu,Xue, Qin,Mccray, Tyra,Margavage, Kathryn,Chen, Fang,Lee, Jae-Hoon,Nezames, Cynthia D.,Guo, Liquan,Terzaghi, William,Wan, Jianmin,Deng, Xing Wang,Wang, Haiyang American Society of Plant Biologists 2013 The Plant cell Vol.25 No.2
<P>This study shows that two catalytic subunits of <I>Arabidopsis</I> protein phosphatase 6 (i.e., FyPP1 and FyPP3) negatively regulate abscisic acid responses through direct interaction with and dephosphorylation of ABI5, which subsequently regulates ABI5 stability and activity, seed germination, and postgermination seedling growth in <I>Arabidopsis</I>.</P>
Dry Finishing Using Plasma Treatment for Shortening the Initial Wet Finishing of Cotton Fabrics
Nezam Samei,Sheila Shahidi,Rattanaphol Mongkholrattanasit 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12
Simultaneity of different processes in finishing of textile products is very useful. It causes reducing energyconsumption and increasing the speed of production. Moreover, by this way it is possible to reduce water consumption andenvironmental pollution. In this research, synchronizing the processes of desizing, scouring and bleaching at ambienttemperature for raw cotton fabrics have been investigated using plasma technology. In this work plasma textile activator,under air atmospheric pressure was used. Untreated and plasma treated cotton fabric were desized, scoured and bleachedusing a solution containing alkaline peroxide and ammonium persulfate as an oxidation accelerator by padding method atroom temperature (Cold Pad Batch). In order to evaluate the results of this treatment, the amount of impurities, degree ofwhiteness and wettability of untreated and plasma treated fabrics were investigated and compared with each other. The resultsshow that the starch partially remains on untreated fabric, while by plasma treatment the starch is completely removed. Plasma treated fabrics have a higher degree of wetting and a higher whiteness than those of untreated. Results of this studyindicate that the plasma treatment of cotton reduces the time it takes to remove starch from cotton products. SEM images ofuntreated and plasma treated fabrics, as well as FTIR spectra of the fabrics; indicate the degradation of starch by the plasmaprocess and the increase of polar groups in cotton fibers. Also, by performing a dry plasma treatment on raw cotton, whileallowing the desizing, scouring and bleaching steps to be simultaneously, economized in water and energy at a single stageand at ambient temperature.
Evaluation of cellulose acetate membrane with carbon nanotubes additives
L.A. Nezam El-Din,A. El-Gendi,N. Ismail,K.A. Abed,Awd I. Ahmed 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
Cellulose acetate (CA)/carbon nano tubes (CNT) membranes were prepared using phase inversion method by dispersing different ratio of carbon nano-materials in CA casting solution. Different polymer to solvent ratios examined for enhancement of membrane desalination. The influence of differentiation in CA and CNT ratio on the morphology and thermal stability were investigated using scanning electron microscopy and thermogravimetric analysis (TGA). Also, Permeation performance of the prepared membranes was evaluated. Morphology results showed that CA membrane porosity decreased with increasing polymer ratio. The membranes pure water flux was increased by the addition of nano-carbon materials. The optimum polymer to solvent ratio for accepted desalination performance was 25:75. The presence of carbon nanotubes (CNT) in the optimum membrane enhanced the salt rejection markedly to 96% as well as the pure water flux has been improved. The optimum membrane in the presence of CNT has convenient thermal stability with accepted water content percent and swelling percent.
Designing Integrated Models as a Decision Aid in Web-based Marketing
Iraj Mahdavi,Hamed Fazlollahtabar,Nezam Mahdavi-Amiri,Mohsen Kakouei 한국데이타베이스학회 2010 Journal of information technology applications & m Vol.17 No.1
Web information systems have been utilized extensively over the past decade. The Internet allows for the entire sales cycle to be conducted on one medium, nearly instantaneously. From making the consumer aware of the product to providing additional information to transacting the final purchase, the Internet can accomplish them all. The Internet is like one big point-of-sales display, with easy access to products and the ability for impulse shopping. Here, we point out different aspects of information technology (IT) in marketing. Consequently, we propose two frameworks as decision aids in web-based marketing environment.
Behzad Maleki Vishkaei,Iraj Mahdavi,Nezam Mahdavi-Amiri,Masoud Askari 한국정보기술응용학회 2016 Journal of information technology applications & m Vol.23 No.3
In recent years, big data has usefully been deployed by organizations with the aim of getting a better prediction for the future. Moreover, knowledge management systems are being used by organizations to identify and create knowledge. Here, the output from analysis of big data and a knowledge management system are used to develop a new model with the goal of minimizing the cost of implementing new recognized processes including staff training, transferring and employment costs. Strategies are proposed from big data analysis and new processes are defined accordingly. The company requires various skills to execute the proposed processes. Organization’s current experts and their skills are known through a pre-established knowledge management system. After a gap analysis, managers can make decisions about the expert arrangement, training programs and employment to bridge the gap and accomplish their goals. Finally, deduction graph is used to analyze the model.
Route Selection in a Dynamic Multi-Agent Multilayer Electronic Supply Network
Iraj Mahdavi,Hamed Fazlollahtabar,S. Hosna Shafieian,Nezam Mahdavi-Amiri 한국데이타베이스학회 2010 Journal of information technology applications & m Vol.17 No.1
We develop an intelligent information system in a multilayer electronic supply chain network. Using the internet for supply chain management (SCM) is a key interest for contemporary managers and researchers. It has been realized that the internet can facilitate SCM by making real time information available and enabling collaboration between trading partners. Here, we propose a multi-agent system to analyze the performance of the elements of a supply network based on the attributes of the information flow. Each layer consists of elements which are differentiated by their performance throughout the supply network. The proposed agents measure and record the performance flow of elements considering their web interactions for a dynamic route selection. A dynamic programming approach is applied to determine the optimal route for a customer in the end-user layer.