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Oxalic acid as a simple and efficient organocatalyst for three-component synthesis ofα-amino nitriles

Chinese Chemical Letters 2011年第5期22卷 543-546页

作者： seyed mohammad vahdat Samad Khaksar Maryam Khavarpour Chemistry Department Islamic Azad UniversityAyatollah Amoli BranchP.O.Box 678AmolIran Chemical Engineering Department Islamic Azad UniversityAyatollah Amoli BranchP.O.Box 678AmolIran

A simple,efficient,and general method has been developed for the synthesis ofα-amino *** acid as a BrФnsted acid promotes the addition of TMSCN to various imines（generated in situ）.

关键词： Oxalic acid TMSCN BrФnsted acid α-Amino nitriles

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One-step,synthesis of Hantzsch esters and polyhydroquinoline derivatives using new organocatalyst

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Chinese Chemical Letters 2010年第5期21卷 563-567页

作者： seyed Meysam Baghbanian Samad Khaksar seyed mohammad vahdat Maryam Farhang Mahmood Tajbakhsh Chemistry Department Islamic Azad UniversityRasht BranchPole-taleshanPO Box 41325-3516RashtIran Chemistry Department Islamic Azad UniversityAyatollah Amoli BranchPO Box 678AmolIran Department of Chemistry Mazandaran UniversityBabolsar 47415Iran

Herein we report an efficient organocatalyst for the multicomponent Hantzsch reaction under mild *** product easily isolated by simple filtration and catalyst can be recovered.

关键词： Organocatalyst Four-component coupling reactions Polyhydroquinoline

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二氧化锡纳米粒子催化四组分Hantzsch缩合合成多氢喹啉衍生物(英文)

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催化学报 2013年第4期34卷 758-763页

作者： seyed mohammad vahdat Fereshteh CHEKIN Mehdi HATAMI Maryam KHAVARPOUR Saeed BAGHERY Ziba ROSHAN‐KOUHI Department of Chemistry Science and Research Ayatollah Amoli Branch Islamic Azad University Marine Science Research Institute Khoramshar University of Marine Science and Technology Chemical Engineering Department Islamic Azad University Ayatollah Amoli Branch Department of Chemistry College of Science Bu‐Ali Sina University Young Researchers Club Science and Research Ayatollah Amoli Branch Islamic Azad University

Tin dioxide (SnO2 ) nanoparticles efficiently catalyzed unsymmetrical four-component Hantzsch condensations of various aldehydes, dimedone, ethyl acetoacetate, and ammonium acetate to form polyhydroquinoline derivatives in excellent yields. This novel method offers several advantages over the traditional method of synthesizing these compounds, including safety, mild conditions, short reaction times, high yields, and an easy workup.

关键词： Nano tin dioxide catalyst Hantzsch condensation Polyhydroquinoline 1 4‐Dihydropyridine

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Relative Humidity and Mean Monthly Temperature Forecasts in Ahwaz Station with ARIMA Model in time Series Analysis

Relative Humidity and Mean Monthly Temperature Forecasts in ...

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International Conference on Environment and Industrial Innovation（ICEII 2011）

作者： Amirpouya Sarraf seyed Farnood vahdat Azita Behbahaninia Faculty Staff of Agriculture Islamic Azad University Roudehen Branch Roudehen-Iran Student in Water Resources engineering Water Engineering Department Science and Research Branch Islamic Azad University Faculty Staff of Environmental Department Islamic Azad University Roudehen Branch Roudehen-Iran

In two recent decades, the resultant changes in global climate were one of the main issues propounded among water resources’ experts in the country;and temperature and humidity forecasts can efficiently be applied in decision making and optimum usage of water resources. Temperature and humidity have irrefutable effects on hydrologic cycle, production cycle of agricultural products, water consumptions （specifically agriculture）, human efforts and environment. Utilization of Statistical distribution is one of the main rules that have the capability of forecasting hydrologic events with largeness and distinctive incidence probability. Theory of time series is implemented by two main aims of perception or modeling random mechanisms and prospect of future amounts of series based on its past. Relative humidity and the average monthly temperature of Ahvaz synoptic station is used in present research of 20-year-old statistic. And a proper model is achieved by applying time series analysis software （ITSM） in accordance with ARIMA model and autocorrelation and partial autocorrelation method and by evaluation of all probabilistic models in terms of being static and study of parameters and types of models, in order to forecast average monthly temperature ARIMA （0,0,1）×（0,1,1）12 and forecast monthly relative humidity ARIMA （0,0,1）×（2,1,2）12 based on Box-Jenkins algorithm and after validation and evaluation of model, we determined that selection of given models was very proper and forecast of relative humidity measure and average monthly temperature is implemented in agricultural years of 2009-2010 and 2010-2011 by them.

关键词： Mean monthly temperature relative humidity ARIMA Ahwaz

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Prediction of monthly mean Inflow to Dez Dam reservoir using time series models （Box-jenkins）

Prediction of monthly mean Inflow to Dez Dam reservoir using...

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International Conference on Environment and Industrial Innovation（ICEII 2011）

作者： seyed Farnood vahdat Amirpouya Sarraf Amir Shamsnia Naeem shahidi Student in Water Resources Engineering Water Engineering Department Science and Research Branch Islamic Azad University Faculty Staff of Agriculture Islamic Azad University Roudehen Branch Roudehen-Iran Faculty Staff of Agriculture Islamic Azad University Shiraz Branch Shiraz-Iran MSc graduated Collegian in Water Resources Engineering member of young research club Islamic Azad University Shiraz branch Shiraz-Iran.

The optimal exploitation of water from a dam reservoir requires a comprehensive knowledge of future availability of water resources. In this case the amount of water that will be available in the future is important. Also, we need to examine the flows at the dam from a short-term perspective. This is necessary to avoid overflowing and to minimize damage. In order to facilitate forecasting of the water resources, many different techniques have been developed through the years. In this paper, using yearly data （since 1988-2007） obtained from Hydrometric station at Dez （upstream of Dez Dam）, the Auto Regressive Integrated Moving average （ARIMA） model, for prediction of monthly mean inflow to Dez Dam reservoir was accomplished. On the basic of comparison the results of the model with measured data, the performance of ARIMA（1,1,0）（1,0,0）12 model is acceptable.

关键词： ARIMA reservoir time series model Inflow prediction Dez Dam.

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