New numerical model for solubility of light alkanes in triethylene glycol

Alireza Bahadori 한국화학공학회 2007 Korean Journal of Chemical Engineering Vol.24 No.3

range of experimental data results, estimates the amount of CH4, C2H6 and C3H8 absorbed per volume of triethyleneglycol (TEG) circulated vs. the partial pressure of light alkanes and the absorber temperature. This article shows thatthe proposed numerical approach is more accurate than routine equation of states in predicting the solubility of lighthydrocarbons in TEG. This article also provides comparisons between the results of the proposed model with experi-

Development and Optimization of Culture Medium for the Production of Glabridin by Aspergillus eucalypticola: An Endophytic Fungus Isolated from Glycyrrhiza glabra L. (Fabaceae)

Parisa Bahadori Ganjabadi,Mohsen Farzaneh,Mohammad Hossein Mirjalili 한국균학회 2023 Mycobiology Vol.51 No.4

Glabridin is a well-known active isoflavone found in the root of licorice (Glycyrrhiza glabra L.)that possess a wide range of biological activity. Plant cells, hairy roots, and fungal endophytescultures are the most important alternative methods for plant resources conservationand sustainable production of natural compounds, which has received much attention inrecent decades. In the present study, an efficient culture condition was optimized for thebiomass accumulation and glabridin production from fungal endophyte Aspergillus eucalypticolaSBU-11AE isolated from licorice root. Type of culture medium, range of pH, and licoriceroot extract (as an elicitor) were tested. The results showed that the highest and lowestbiomass production was observed on PCB medium (6.43 ± 0.32 g/l) and peptone malt(5.85þ0.11 g/l), respectively. The medium culture PCB was produced the highest level ofglabridin (7.26 ± 0.44mg/l), while the lowest level (4.47 ± 0.02mg/l) was obtained from themedium peptone malt. The highest biomass (8.51 ± 0.43 g/l) and glabridin (8.30 ± 0.51mg/l)production were observed from the PCB medium adjusted with pH=6, while the lowestvalue of both traits was obtained from the same medium with pH=7. The highest productionof total glabridin (10.85 ± 0.84mg/l) was also obtained from the culture medium treatedwith 100 mg/l of the plant root extract. This information can be interestingly used for thecommercialization of glabridin production for further industrial applications.

Anti-proliferative and apoptotic effects of hull-less pumpkin extract on human papillary thyroid carcinoma cell line

Mohammad Hadi Bahadori,Zoleikha Azari,Arash Zaminy,Sara Dabirian,Seyed Mojtaba Mehrdad,Bahman Jalali Kondori 대한해부학회 2021 Anatomy & Cell Biology Vol.54 No.1

Papillary thyroid carcinoma (PTC) is one of the most common cancers of the endocrine system. Previous studies have shown that the extract of hull-less pumpkin seed (HLPS) has a significant anti-cancer effect. The aim of this study was to evaluate the effect of this plant extract on the proliferation of PTC cells. In this study, an extract of this plant was prepared by soxhlet extraction method and analyzed by Gas Chromatography-Mass Spectrometry. The cytotoxicity of PTX and plant extract was investigated using the methylthiazol tetrazolium (MTT) method. For careful investigation of morphological alteration, we used hematoxylin and eosin and Giemsa stinging. Based on MTT assay test, the IC50 value of paclitaxel (PTX) was significantly less than the hydro-alcoholic extract of HLPS at all of the incubation time. Our results of histological staining showed that HLPS and PTX induced significant morphological alteration in the PTC cultured cell that consistent with cell death. Comparing the groups treated by PTX or HLPS with control group showed significant differences. It seems that HLPS extract has an apparent effect on treatment of PTC, at least in laboratory condition, albeit for realistic decision about the effect of HLPS on PTC, more molecular investigations are necessary.

A novel modeling approach to optimize oxygen–steam ratios in coal gasification process

Arabloo, Milad,Bahadori, Alireza,Ghiasi, Mohammad M.,Lee, Moonyong,Abbas, Ali,Zendehboudi, Sohrab Elsevier 2015 Fuel Vol.153 No.-

<P><B>Abstract</B></P> <P>Coal gasification operation appears to be an essential element in the advanced energy systems, where the reaction between oxygen, steam and coal results in production of syngas (e.g., a mixture of carbon monoxide and hydrogen) under elevated pressure and temperature conditions. An efficient design for gasification process is expected if proper oxygen/steam rations are selected such that a thermal balance is established between the exothermic and endothermic reactions, leading to yield maximization of desired products in most cases. In this article, a rigorous modeling approach using support vector machine (SVM) algorithm is developed to estimate optimum oxygen–steam ratios required to balance the released heat and heat requirement in coal gasification process. An acceptable match between modeling outputs and real data is noticed so that the average absolute error is lower than 1.0%.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Support Vector Machine Algorithm is used to estimate oxygen–steam ratios in coal gasification process. </LI> <LI> The coupled simulated annealing optimization tool obtains the optimal model parameters. </LI> <LI> The model has been developed and tested using 100 series of the data. </LI> <LI> Excellent agreement between the results of model and reported data is observed. </LI> </UL> </P>

Retrofit of a UK residential property to achieve nearly zero energy building standard

Salem, Radwa,Bahadori-Jahromi, Ali,Mylona, Anastasia,Godfrey, Paulina,Cook, Darren Techno-Press 2018 Advances in environmental research Vol.7 No.1

It is currently agreed upon that one of the major challenges in the construction industry is the energy efficiency of existing buildings. The World Meteorological Organisation (WMO) and United Nations (UN) have reported that the concentration of global atmospheric carbon dioxide has increased by an average of 50%, a record speed, from 2015 to 2016. The housing sector contributes to 45% of the UK's carbon emissions. To help tackle some of those issues the recast Energy Performance Building Directive (EBPD) has introduced Nearly Zero Energy Buildings (NZEBs) in the coming years (including buildings that will undergo refurbishment/renovations). This paper will explore the retrofitting of a UK residential dwelling using Thermal Analysis Simulation (TAS, EDSL) software by focusing on building fabric improvements and usage of on-site renewables. The CIBSE Test Reference Year (TRY) weather data has been selected to examine the performance of the building under current and future climate projections. The proposed design variables were finally implemented in the building altogether on TAS. The simulation results showed a reduction in the building's annual energy consumption of $122.64kWh/m^2$ (90.24%). The greatest savings after this were achieved for the annual reduction in carbon emissions and avoided emissions, which were 84.59% and $816.47kg/CO_2$, respectively.

The influence of different factors on buildings’ height in the absence of shear walls in low seismic regions

Reza Keihani,Ali Bahadori-Jahromi,Charles Goodchild,Katherine A. Cashell 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.76 No.1

Shear walls are structural members in buildings that are used extensively in reinforced concrete frame buildings, and almost exclusively in the UK, regardless of whether or not they are actually required. In recent years, the UK construction industry, led by the Concrete Centre, has questioned the need for such structural elements in low to mid-rise reinforced concrete frame buildings. In this context, a typical modern, 5-storey residential building is studied, and its existing shear walls are replaced with columns as used elsewhere in the building. The aim is to investigate the impact of several design variables, including concrete grade, column size, column shape and slab thickness, on the building’s structural performance, considering two punching shear limits (VEd/VRd,c), lateral drift and accelerations, to evaluate its maximum possible height under wind actions without the inclusion of shear walls. To facilitate this study, a numerical model has been developed using the ETABS software. The results demonstrate that the building examined does not require shear walls in the design and has no lateral displacement or acceleration issues. In fact, with further analysis, it is shown that a similar building could be constructed up to 13 and 16 storeys high for 2 and 2.5 punching shear ratios (VEd/VRd,c), respectively, with adequate serviceability and strength, without the need for shear walls, albeit with thicker columns.

Paclobutrazol Reduces Vegetative Growth and Enhances Flowering and Fruiting of Mature ‘J.H. Hale’ and ‘Red Skin’ Peach Trees

Kazem Arzani,Farzaneh Bahadori,Saeed Piri 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.2

Vegetative and reproductive responses of mature peach (Prunus persica) trees cultivars ‘J.H. Hale’ and ‘Red Skin’ on ‘Montclar’ peach seedling rootstock to soil applied paclobutrazol (PBZ) were examined under Moghan, Iran environmental conditions. PBZ was soil drenched at 0 (control), 0.5 (L-PBZ), and 1.5 gㆍtree?¹ a.i. (H-PBZ) with six replications. PBZ significantly reduced vegetative growth during the experiment. Total pruning dry weight, shoot growth, and trunk cross sectional area of PBZ-treated trees were reduced compared to those of controls, with H-PBZ being more effective than L-PBZ. PBZ treatments advanced flowering and time of fruit harvest on ‘J.H. Hale’ and ‘Red Skin’ by 2-4 and 2-7 days, respectively, in the following season. PBZ treatments increased flower and fruit densities, fruit set, crop density, yield and yield efficiency in both cultivars in the following season. Similarly, the total number of fruits in the second season was increased in both cultivars by PBZ treatments. However, fruit size was smaller in the PBZ treatments than control. The effects of PBZ treatments and cultivars on total soluble solids, total fruit sugars, and fruit acidity were not significant. Leaf N and P was not influenced by any PBZ treatments, but Ca and K concentrations were increased by H-PBZ. In conclusion, H-PBZ was the most effective in reducing vegetative growth and promoting reproductive growth.

Comparing building performance of supermarkets under future climate change: UK case study

Agha Usama Hasan,Ali Bahadori-Jahromi,Anastasia Mylona,Marco Ferri,Hexin Zhang Techno-Press 2022 Advances in energy research Vol.8 No.1

Focus on climate change and extreme weather conditions has received considerable attention in recent years. Civil engineers are now focusing on designing buildings that are more eco-friendly in the face of climate change. This paper describes the research conducted to assess the impact of future climate change on energy usage and carbon emissions in a typical supermarket at multiple locations across the UK. Locations that were included in the study were London, Manchester, and Southampton. These three cities were compared against their building performance based on their respective climatic conditions. Based on the UK Climatic Projections (UKCP09), a series of energy modelling simulations which were provided by the Chartered Institute of Building Service Engineers (CIBSE) were conducted on future weather years for this investigation. This investigation ascertains and quantifies the annual energy consumption, carbon emissions, cooling, and heating demand of the selected supermarkets at the three locations under various climatic projections and emission scenarios, which further validates annual temperature rise as a result of climatic variation. The data showed a trend of increasing variations across the UK as one moves southwards, with London and Southampton at the higher side of the spectrum followed by Manchester which has the least variability amongst these three cities. This is the first study which investigates impact of the climate change on the UK supermarkets across different regions by using the real case scenarios.

The significance of removing shear walls in existing low-rise RC frame buildings – Sustainable approach

Reza Keihani,Ali Bahadori-Jahromi,Charles Goodchild 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.71 No.5

According to The Concrete Centre, in the UK shear walls have become an inseparable part of almost every reinforced concrete frame building. Recently, the construction industry has questioned the need for shear walls in low to mid-rise RC frame buildings. This study tried to address the issue in two stages: The first stage, the feasibility of removing shear walls in an existing design for a residential building where ETABS and CONCEPT software were used to investigate the structural performance and cost-effectiveness respectively. The second stage, the same structure was examined in various locations in the UK to investigate regional effects. This study demonstrated that the building without shear wall could provide adequate serviceability and strength within the safe range defined by Eurocodes. As a result, construction time, overall cost and required concrete volume are reduced which in turn enhance the sustainability of concrete construction.

Comparative study of factors influencing tension lap splices in reinforced concrete beams

Karkarna, Yakubu M.,Bahadori-Jahromi, Ali,Jahromi, Hamid Zolghadr,Bonner, Emily,Goodchild, Charles Techno-Press 2020 Advances in concrete construction Vol.10 No.4

The practice of splicing reinforcing bars in reinforced concrete structures to manage insufficient bar length is a common approach, which is mainly due to transportation limitations on bar length. The splicing of reinforcing bars side by side offers a simple and economical solution to the problem of continuity. This paper examines the influence of different structural parameters such as concrete cover, lap splice length, shear links confinement and concrete strength on the lap splices based on an extensive experimental database of laps and anchorage. The current study shows that increasing the lap splices beyond 50Ø has no additional benefit for increasing its strength. The results also show that relative to the measured stress, specimens with larger concrete side covers shows higher splice stress compared to the samples with smaller concrete covers.