Solution properties of sodium n-dodecyl sulfate in the presence of meso-tetrakis (N-methylpyridinium-4-yl) porphyrin

Hassanpour, Azin,Azani, Mohammad-Reza,Bordbar, Abdol-Khalegh Korean Chemical Society 2011 대한화학회지 Vol.55 No.3

양이온성 수용성 5, 10, 15, 20-tetrakis(N-methylpyridinium-4-yl) porphyrin (TMPyP)의 존재 하에서 음이온 계면 활성제인 sodium n-dodecyl sulfate 의 용액 특성을 전도도법, UV-vis 및 공명 빛 산란 (RLS) 분광학적 방법을 이용하여 포괄적으로 연구하였다. 그 결과에 따르면 TMPyP 농도의 증가로 SDS 용액의 임계 미셀 농도는 감소하였는데, SDS 미셀의 안정화는 미셀 표면에 존재하는 음전하의 중화 때문이다. SDS용액 내에는 자유 포르피린 단량체, 미셀에 속박된 포르피린 단량체 또는 응집체, 그리고 nonmicellar porphyrin/계면 활성제 응집체와 같은 세 종류의 TMPy종이 분명히 존재하였다. 우리의 연구 결과는 SDS가 TMPyP의 응집을 유도한다는 것을 나타내었다. 실제로 두 종류의 J-aggregations이 관찰되었는데, 하나는 미셀에 속박된 포르피린 단량체 또는 응집체였으며, 다른 하나는 nonmicellar porphyrin/계면 활성제 응집체이다. 그러나, cmc이하에서는 TMPyP가 SDS 음이온과 정전기 상호작용을 나타내었다. The solution properties of sodium n-dodecyl sulfate, as an anionic surfactant in the presence of a cationic watersoluble 5, 10, 15, 20-tetrakis (N-methylpyridinium-4-yl) porphyrin (TMPyP) has been comprehensively studied by means of conductometry, UV-vis and resonance light scattering (RLS) spectroscopies. The results represent the decreasing of critical micelle concentration of SDS solution due to increasing of TMPyP concentration. The stabilization of SDS micelle is due to neutralization of negative charge at the micelle surface. The presence of three different species of TMPyP in SDS solution has been unequivocally demonstrated: free porphyrin monomers, porphyrin monomers or aggregates bound to the micelles, and nonmicellar porphyrin/surfactant aggregates. Our results show SDS induced an aggregation in TMPyP. In fact two kinds of J-aggregations were observed: one of them for porphyrin monomers or aggregates bound to the micelles and the other for nonmicellar porphyrin/surfactant aggregates. However, the results represent the electrostatic interaction of TMPyP with SDS anion below the cmc.

One-Pot and Green Procedure for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-(thio)ones Using ZnO Nanoparticles as a Solid Acid Catalyst

Hassanpour, Akbar,Abolhasani, Jafar,Khanmiri, Rahim Hosseinzadeh Korean Chemical Society 2014 대한화학회지 Vol.58 No.5

A convenient and efficient method has been developed for the one-pot synthesis of dihydropyrimidinones (DHPMs) compounds. Dihydropyrimidinone derivatives were synthesized in good yields using ethyl acetoacetate, aldehyde (aromatic and aliphatic) and urea or thiourea in the presence of ZnO nanoparticles as a catalyst in $H_2O$ as solvent at $80^{\circ}C$. This green chemistry procedure applied to the Biginelli reaction using ZnO nanoparticles as catalyst and illustrated as a rapid preparation of DHPMs in water as solvent. The products were identified by physical data (mp) by comparison with those reported in the literatures.

Development of the FCM-SVR Hybrid Model for Estimating the Suspended Sediment Load

Farzad Hassanpour,Salman Sharifazari,Khaled Ahmadaali,Sara Mohammadi,Zeinab Sheikhalipour 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.6

The accurate estimation of suspended sediment load (SSL) carried by a river is one of the primary issues in river engineering, water resources, and environment projects. Boundary condition and simplification of some important parameters lead to some limitation on the empirical sediment equations which are based on flow and sediment properties. In this study, the potential of a developed Fuzzy C-mean clustering-support vector regression model, as a FCM-SVR hybrid model, was investigated in comparison with sediment rating curve (SRC), artificial neural network (ANN), adaptive neuro-fuzzy inference system (ANFIS), and support vector regression (SVR) models for estimating the daily SSL in Sistan River in Iran. Root mean square error (RMSE), mean absolute error (MAE), determination coefficient (R2), and Nash-Sutcliffe efficiency coefficient (NSE) statistics were utilized to evaluate the accuracy of the models. The result showed that FCM-SVR model estimates SSL (with RMSE, MAE, R2, and NSE equal to 34,415.52 ton/day, 12,256.28 ton/day, 0.922, and 0.918 respectively in testing period) more accurate than other models. The RMSE value, which was 50% lower compared to other models, reveals that this model possesses the lowest error than the other models. Also, the obtained results indicated that the estimated SSLs, using the best FCM-SVR, were in good agreement and linear dependence with observed values. Unlike other models, FCM-SVR model appropriately estimates extreme values of SSL.

Predation activity of Chrysoperla carnea (Neuroptera: Chrysopidae) upon Aphis fabae (Hemiptera: Aphididae): Effect of different hunger levels

Mahdi Hassanpour,Rezvan Maghami,Hooshang Rafiee-Dastjerdi,Ali Golizadeh,Mohsen Yazdanian,Annie Enkegaard 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.2

This research investigated the effect of different hunger levels on the functional response of three larval instars of Chrysoperla carnea Stephens (Neuroptera: Chrysopidae) to amixture of third and fourth nymphal instars of Aphis fabae Scopoli (Homoptera: Aphididae).Hunger levels for the first and second larval instars of the predatorwere 4, 12 and 24 h. For the third instar, the hunger levelswere 2, 4 and 8 h. At 4, 12 and 24 h, the functional responses for the first instar larvae of the predatorwere fromtypes II, II and III,whereas those for second instarwere fromtypes III, III and II, respectively. The last instar of the predator showed the functional response types II, II and III at 2, 4 and 8 h hunger levels, respectively. The handling times estimated for the first instar larvae of the predator were not significantly different between hunger levels. However, there was a significant difference between the handling times estimated for the second and third larval instar of the predator at different hunger levels.

Antihypertensive Effect of Celery Seed on Rat Blood Pressure in Chronic Administration

Maryam Hassanpour Moghadam,Mohsen Imenshahidi,Seyed Ahmad Mohajeri 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.6

This study investigated the effects of different celery (Apium graveolens) seed extracts on blood pressure (BP) in normotensive and deoxycorticosterone acetate–induced hypertensive rats. The hexanic, methanolic, and aqueous-ethanolic extracts were administered intraperitoneally and their effects on BP and heart rate (HR) were evaluated in comparison with spirnolactone as a diuretic and positive control. Also, the amount of n-butylphthalide (NBP), as an antihypertensive constituent, in each extract was determined by HPLC. The results indicated that all extracts decreased BP and increased the HR in hypertensive rats, but had no effect on normotensive rats. The data showed that administration of 300 mg/kg of hexanic, methanolic, and aqueous-ethanolic (20/80, v/v) extracts of the celery seed caused 38, 24, and 23mmHg reduction in BP and 60, 25, and 27 beats per minute increase in the HR, respectively. Also, the HPLC analysis data revealed that the content of NBP in the hexanic extract was 3.7 and 4 times greater than methanolic and aqueous-ethanolic extracts. It can be concluded that celery seed extracts have antihypertensive properties, which appears to be attributable to the actions of its active hydrophobic constitutes such as NBP and can be considered as an antihypertensive agent in chronic treatment of elevated BP.

Agent-Based Simulation for Pedestrian Evacuation Behaviour Using the Affordance Concept

Sajjad Hassanpour,Amir Abbas Rassafi 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.4

Simulation modelling is a necessary tool to analyse pedestrian movement behaviour in order to predict the social and collective behaviour in different situations. Psychological aspects of human behaviour in interacting with the environment is the critical point in the pedestrian simulation context. The affordance theory originated from psychology and humanities is a key concept to address this issue and model the relationship between an agent and his/her environment. This study aims to introduce a prototype of an agent-based model using the affordance concept to simulate the decision-making process during an evacuation. The proposed approach was tested to model the behaviour of evacuees in a platform of a subway station through both normal and emergencies. The results of the test including the evacuation time and flows toward different scenarios, showed that the model can work properly. The proposed approach can yield a useful tool for designers to mention pedestrian movement behaviour in their building designs.

Response of Tuberose (Polianthes tuberose L.) to Gibberellic Acid and Benzyladenine

Moazzam Hassanpour Asil,Zeynab Roein,Jafar Abbasi 한국원예학회 2011 Horticulture, Environment, and Biotechnology Vol.52 No.1

Effect of different chemical treatments on quantitative characteristics of Polianthes tuberose L. (cv. Goldorosht Mahallat) was investigated. This research was conducted in a factorial experiment based on block design with 3 replications. 40 and 54 days after planting, the flowers were sprayed with various concentrations of Gibberellic acid (GA3) and Benzyladenine (BA) (0, 50, and 100 ppm). The results showed that, flowering stem length and leaves length were greatest with GA3 at 100 ppm while BA no increase these traits compared to the control. GA3 resulted in earlier flowering compared to the control. BA and GA3 decreased number of floret. Greatest diameter of floret and vase life of cut flower was BA at 50 and 100 ppm, respectively.

1-MCP Improves the Postharvest Quality of Cut Spray Carnation (Dianthus caryophyllus L.) ‘Optima’ Flowers

Moazzam Hassanpour Asil,Mahnaz Karimi,Hedayat Zakizadeh 한국원예학회 2013 Horticulture, Environment, and Biotechnology Vol.54 No.1

The aim of the present work was to study the role of 1-methylcyclopropene (1-MCP) on vase life and other postharvest qualities of cut spray carnation flowers. The experiment was arranged in a completely randomized factorial design composed of two factors: 1-MCP concentration at four levels (0, 0.4, 0.6, and 0.8 g・m-3) and a period of treatment at 2 levels (3 and 6 hours) with four replications. According to the analysis of variance, time duration, 1-MCP concentration and their interaction had significant effects on the vase life, ethylene production,anthocyanin concentration, and weight loss of cut flowers (P ≥ 0.01). The treatment for 6 hours was better than 3hours in all concentrations of 1-MCP. The longest vase life (16.25 days) was obtained when 0.6 g・m-3 1-MCP was used for 6 hours. Ethylene production by freshly cut flowers in the treatment of 0.6 g・m-3 1-MCP for 6 hours was negligible as compared with the control. Applying 1-MCP at any dose significantly minimized the % weight loss as compared to the control on days 5 and 8. Interaction between 1-MCP concentrations and a period of treatment on chlorophyll content was not significant.

THE KARUSH-KUHN-TUCKER OPTIMALITY CONDITIONS IN INTERVAL-VALUED MULTIOBJECTIVE PROGRAMMING PROBLEMS

Hosseinzade, Elham,Hassanpour, Hassan The Korean Society for Computational and Applied M 2011 Journal of applied mathematics & informatics Vol.29 No.5

The Karush-Kuhn-Tucker (KKT) necessary optimality conditions for nonlinear differentiable programming problems are also sufficient under suitable convexity assumptions. The KKT conditions in multiobjective programming problems with interval-valued objective and constraint functions are derived in this paper. The main contribution of this paper is to obtain the Pareto optimal solutions by resorting to the sufficient optimality condition.

Optimal Design of a Direct-Drive Permanent Magnet Synchronous Generator for Small-Scale Wind Energy Conversion Systems

Mohammadali Abbasian,Arash Hassanpour Isfahani 한국자기학회 2011 Journal of Magnetics Vol.16 No.4

This paper presents an optimal design of a direct-drive permanent magnet synchronous generator for a smallscale wind energy conversion system. An analytical model of a small-scale grid-connected wind energy conversion system is presented, and the effects of generator design parameters on the payback period of the system are investigated. An optimization procedure based on genetic algorithm method is then employed to optimize four design parameters of the generator for use in a region with relatively low wind-speed. The aim of optimization is minimizing the payback period of the initial investment on wind energy conversion systems for residential applications. This makes the use of these systems more economical and appealing. Finite element method is employed to evaluate the performance of the optimized generator. The results obtained from finite element analysis are close to those achieved by analytical model.