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| 1 | Stool-based DNA testing,a new noninvasive method for colorectal cancer screening,the first report from Iran显示文摘AIM:To detect tumor-associated DNA changes in stool samples among Iranian patients with colorectal cancer(CRC)compared to healthy individuals using BAT-26,p16 hypermethylation and long DNA markers.METHODS:Stool DNA was isolated from 45 subjects including 25 CRC patients and 20 healthy individuals using a new,fast and easy extraction method.Long DNA associated with tumor was detected using polymerase chain reaction method.Microsatellite studies were performed utilizing denaturating polyacrylamide gel to determine the instability of BAT-26.Methylation status of p16 promoter was analyzed using methylation-specific PCR(MSP).RESULTS:The results showed a significant difference in existence of long DNA(16 in patients vs 1 in controls,P < 0.001)and p16(5 in patients vs none in controls,P = 0.043)in the stool samples of two groups.Long DNA was detected in 64% of CRC patients;whereas just one of the healthy individuals was positive for Long DNA.p16 methylation was found in 20% of patients and in none of healthy individuals.Instability of BAT-26 was not detected in any of stool samples.CONCLUSION:We could detect colorectal cancer related genetic alterations by analyzing stool DNA witha sensitivity of 64% and 20% and a specificity of 95% and 100% for Long DNA and p16 respectively.A non-invasive molecular stool-based DNA testing can provide a screening strategy in high-risk individuals.However,additional testing on more samples is necessary from Iranian subjects to determine the exact specificity and sensitivity of these markers. | Mohammad Reza Abbaszadegan Alireza Tavasoli Arash Velayati Hamid Reza Sima Hassan Vosooghinia Mehdi Farzadnia Hamid Asadzedeh Mehran Gholamin Ezzat Dadkhah Azadeh Aarabi | 2007 | World Journal of Gastroenterology2007，13，10： | 14 |
| 2 | Comparison of performance of Ni-Mo/γ-alumina catalyst in HDS and HDN reactions of main distillate fractions显示文摘A bimetallic nickel-molybdenum catalyst supported on γ-alumina was synthesized by the two-step incipient wetness impregnation technique.The activity of the prepared Ni-Mo/γ-alumina catalyst was evaluated in a down flow fixed-bed microreactor.In this way,hydrodesulfurization(HDS)and hydrodenitrogenation(HDN)reactions of the main distillate fractions of crude oil were assessed.XRD,SEM,TPR,ICP-OES,BET-BJH and nitrogen adsorption/desorption methods were used for characterizing the synthesized Ni-Mo/γ-alumina catalyst.The active metals with Ni/Mo mass ratio of 0.23 and total metal of 13.7 wt% were loaded on the support,similar to the commercial industrial catalyst.The performance tests were conducted at 3.0 MPa(for light naphtha and heavy naphtha)and at 4.5 MPa(for kerosene and gas oil).The results revealed that the total sulfur conversion of the light naphtha,heavy naphtha,kerosene and gas oil fractions was 98.3%,95%,91.7% and 90.1%(after 24 h),respectively. | Babak Behnejad Majid Abdouss Ahmad Tavasoli | 2019 | Petroleum Science2019，16，3： | 5 |
| 3 | Comparing the deactivation behaviour of Co/CNT and Co/γ-Al_2O_3 nano catalysts in Fischer-Tropsch synthesis显示文摘An extensive study of Fischer-Tropsch (FT) synthesis on cobalt nano particles supported on γ-alumina and carbon nanotubes (CNTs) catalysts is reported.20 wt% of cobalt is loaded on the supports by impregnation method.The deactivation of the two catalysts was studied at 220 C,2 MPa and 2.7 L/h feed flow rate using a fixed bed micro-reactor.The calcined fresh and used catalysts were characterized extensively and different sources of catalyst deactivation were identified.Formation of cobalt-support mixed oxides in the form of xCoO yAl2O3 and cobalt aluminates formation were the main sources of the Co/γ-Al2O3 catalyst deactivation.However sintering and cluster growth of cobalt nano particles are the main sources of the Co/CNTs catalyst deactivation.In the case of the Co/γ-Al2O3 catalyst,after 720 h on stream of continuous FT synthesis the average cobalt nano particles diameter increased from 15.9 to 18.4 nm,whereas,under the same reaction conditions the average cobalt nano particles diameter of the Co/CNTs increased from 11.2 to 17.8 nm.Although,the initial FT activity of the Co/CNTs was 26% higher than that of the Co/γ-Al2O3,the FT activity over the Co/CNTs after 720 h on stream decreased by 49% and that over the Co/γ-Al2O3 by 32%.For the Co/γ-Al2O3 catalyst 6.7% of total activity loss and for the Co/CNTs catalyst 11.6% of total activity loss cannot be recovered after regeneration of the catalyst at the same conditions of the first regeneration step.It is concluded that using CNTs as cobalt catalyst support is beneficial in carbon utilization as compared to γ-Al2O3 support,but the Co/CNTs catalyst is more susceptible for deactivation. | Ahmad Tavasoli Saba Karimi Somayeh Taghavi Zahra Zolfaghari Hamideh Amirfirouzkouhi | 2012 | Journal of Natural Gas Chemistry2012，21，5： | 4 |
| 4 | Kinetics and product distribution studies on ruthenium-promoted cobalt/alumina Fischer-Tropsch synthesis catalyst显示文摘Hydrocarbon production rates and distributions on ruthenium promoted alumina supported cobalt Fischer-Tropsch synthesis (FTS) catalyst were studied by the concept of two superimposed Anderson-Schulz-Flory (ASF) distributions.The results indicated that the characterizing growth probabilities α1 and α2 were strongly dependent on reaction conditions.By increasing the H2 /CO partial pressure ratios and reaction temperatures,deviation from normal ASF distribution decreases and the double-α-ASF distribution changes into a straight line.Based on the concept of double-α-ASF distribution,a useful rate equation for the production of hydrocarbons under industrial reaction conditions is obtained. | Ahmad Tavasoli Ali Nakhaei Pour Masoumeh Ghalbi Ahangari | 2010 | Journal of Natural Gas Chemistry2010，19，6： | 3 |
| 5 | Production of hydrogen and syngas via pyrolysis of bagasse in a dual bed reactor显示文摘Pyrolysis of bagasse followed by thermal cracking of tar was carried out at atmospheric pressure using a dual bed reactor. The first bed was used for the pyrolysis and the second bed was used for thermal cracking of tar. Iron fillings were used as the packed bed material in the second bed. The effects of reaction time (20 to 40 min), reactor temperature (600 to 900℃) and packed bed height (40-100 mm) on the product (char, tar and gas) yield and gas (H2 , CO, CO2 , CH4 , CnHm ) composition were studied. Over the ranges of the experimental conditions used, the operating conditions were optimized for pyrolysis temperature around 850℃, a reaction time of 30 min and packed bed height of 100 mm, thus we could obtain a gas richer in hydrogen and carbon monoxide and poorer in carbon dioxide and hydrocarbons. It was observed that compared with single bed process, dual bed process increased the gas yield from 0.397 to 0.750 m3 /kg and decreased the tar yield from 0.445 to 0.268 g/g while the heating value of the product gas remained almost constant (10-11 MJ/m3 ). | Morteza Shoja Mokhtar Akhond Babatabar Ahmad Tavasoli Abtin Ataei | 2013 | Journal of Energy Chemistry2013，22，4： | 3 |
| 6 | CoolClot,a novel hemostatic agent for controlling life-threatening arterial bleeding显示文摘BACKGROUND:Uncontrolled bleeding is the first leading cause of preventable death in the battlefield and the 2nd cause of mortality in civil accidents.Incompressible hemorrhage control is among the interventions that drastically increase the survival rate in wound individuals.We have previously shown that a certain mixture of bentonite and zeolite minerals can significantly decrease the bleeding in rats.METHODS:In this study,nine healthy hybrid dogs were selected and after induction of anesthesia with ether,either arterial puncture by a needle or arteriotomy was performed on both groin regions of the dogs.For control arteries(either the right or left femoral artery),only pressure by sterilized gauze was performed,while for the femoral arteries of the opposite side,our invented hemostatic agent,namely CoolClot,was topically used before applying the pressure.In the second stage of the study,to assess the coagulation time,blood samples were collected from 10 volunteer students.RESULTS:CoolClot significantly decreased the bleeding time in animals whose femoral arteries were cut or punctured.In the human phase of the study,the mean coagulation time in control blood samples was 253.4+44.1 seconds,whereas it was 149.5+50.0,162.3±74.6 and 143.4±114.6seconds,respectively in blood samples treated with bentonite,zeolite and CoolClot(P<0.05).CONCLUSIONS:As controlling bleeding after a life-threatening arterial damage is critical for increasing the chance of survival,the results obtained in this study indicate the significant efficacy of CoolClot in shortening the bleeding time.Our experiments also indicate that CoolClot can significantly reduce the clotting time in human blood samples. | SMJ Mortazavi A Tavasoli M Atefi N Tanide N Radpey P Roshan-shomal H Moradi S Taeb | 2013 | World Journal of Emergency Medicine2013，4，2： | 2 |
| 7 | Enhancement of bimetallic Fe-Mn/CNTs nano catalyst activity and product selectivity using microemulsion technique显示文摘Bimetallic Fe-Mn nano catalysts supported on carbon nanotubes(CNTs) were prepared using microemulsion technique with water-to-surfactant ratios of 0.4-1.6. The nano catalysts were extensively characterized by different methods and their activity and selectivity in Fischer-Tropsch synthesis(FTS) have been assessed in a fixed-bed microreactor. The physicochemical properties and performance of the nanocatalysts were compared with the catalyst prepared by impregnation method. Very narrow particle size distribution has been produced by the microemulsion technique at relatively high loading of active metal. TEM images showed that small metal nano particles in the range of 3–7 nm were not only confined inside the CNTs but also located on the outer surface of the CNTs. Using microemulsion technique with water to surfactant ratio of0.4 decreased the average iron particle sizes to 5.1 nm. The reduction percentage and dispersion percentage were almost doubled. Activity and selectivity were found to be dependent on the catalyst preparation method and average iron particle size. CO conversion and FTS rate increased from 49.1% to 71.0% and 0.144 to 0.289 gHC/(gcat h), respectively. While the WGS rate decreased from 0.097 to 0.056 gCO2/(gcat h). C5+liquid hydrocarbons selectivity decreased slightly and olefins selectivity almost doubled. | Zahra Zolfaghari Ahmad Tavasoli Saber Tabyar Ali Nakhaei Pour | 2014 | Journal of Energy Chemistry2014，23，1： | 2 |
| 8 | Performance enhancement of bimetallic Co-Ru/CNTs nano catalysts using microemulsion technique显示文摘Bimetallic cobalt-ruthenium nano catalysts supported on carbon nanotubes(CNTs)are prepared using microemultion technique with water-to-surfactant ratios of 0.5—1.5.The nano catalysts were extensively characterized by different methods and their activity and selectivity in Fischer-Tropsch synthesis(FTS)have been assessed in a fixed-bed microreactor.The physicochemical properties and performance of the nanocatalysts were compared with the catalyst prepared by impregnation method.Very narrow particle size distribution has been produced by the microemulsion technique at relatively high loadings of active metals(15 wt%Co and 1 wt%Ru).According to TEM images,small Co particles(2—7 nm)were mostly confined inside the CNTs.Comparing with the catalyst prepared by impregnation,the use of microemulsion technique with water to surfactant ratio of 0.5 decreased the average cobalt oxide particle size to 4.8 nm,the dispersion was almost doubled and the reduction increased by 28%.Activity and selectivity were found to be dependent on the catalyst preparation method and water-to-surfactant ratio(as well as cobalt particle sizes).CO conversion increased from 59.1%to 75.1%and the FTS rate increased from 0.291 to0.372 gHC/(gcath).C5+liquid hydrocarbons selectivity decreased from 92.4%to 87.6%. | Ahmad Tavasoli Somayeh Taghavi | 2013 | Journal of Energy Chemistry2013，22，5： | 2 |
| 9 | Effect of elemental molar ratio on the synthesis of higher alcohols over Co-promoted alkali-modified Mo_2C catalysts supported on CNTs显示文摘A series of molybdenum carbide catalysts promoted by potassium and cobalt,supported on carbon nanotubes(CNTs) were prepared by carbothermal hydrogen reduction method using CNTs as a carbon precursor.Firstly,molybdenum and cobalt were loaded by co-precipitation method,and then potassium and additional molybdenum were impregnated to previous resultant.Different Mo/Co and K/Co molar ratio were used in catalyst synthesis.All the catalysts were characterized by ICP,BET,TEM,TPR,XRD and XPS,and the catalysts performances for higher alcohols synthesis(HAS) were investigated in a fixed-bed micro-reactor.The maximum selectivity to higher alcohols(C2+OH) was obtained at Mo/Co and K/Mo molar ratios of 1.66 and 0.6,respectively.XRD results confirmed the formation of K-Mo-C site and Co3Mo3 C phase that might play important role in producing C2+OH. | Rohollah M.Kiai Tahereh Nematian Ahmad Tavasoli Ali Karimi | 2015 | Journal of Energy Chemistry2015，24，3： | 2 |
| 10 | Fiscber-Tropsch synthesis over cobalt catalyst supported on carbon nanotubes in a slurry reactor显示文摘 | Ahmad Tavasoli Reza M Malek Abbaslou Mariane Trepanier | 2008 | Applied Catalysis A-Gener2008，345，2： | 1 |
| 11 | Two-time scale control and observer design for trajectory tracking of two cooperating robot manipulators moving a flexible beam显示文摘 | Ali Tavasoli Mohammad Eghtesad Hamed Jafarian | 2009 | Robotics and Autonomous Systems2009，57，2： | 1 |
| 12 | Synthesis of higher alcohols from syngas over alkali promoted MoS2 catalysts supported on multi-walled carbon nanotubes显示文摘 | Surisetty V R Tavasoli A Dalai A K | 2009 | Applied Catalysis A:General2009，365，： | 1 |
| 13 | Two-time scale control and observer design for trajectory tracking of two cooperating robot manipulators moving a flexible beam显示文摘 | Tavasoli A Eghtesad M Jafarian H | 2009 | Robotics and Autonomous Systems2009，57，2： | 1 |
| 14 | Fischer-Tropsch synthesis over ruthenium-promoted Co/Al_2O_3 catalyst with different reduction procedures显示文摘The effect of reduction procedure on catalyst properties, activity and products selectivity of ruthenium-promoted Co/γ-Al2O3 catalyst in Fischer-Tropsch synthesis (FTS) was investigated. Catalyst samples were reduced with different reduction gas compositions and passivated before being characterized by TPR and XRD techniques. Different activity and product selectivity analyses were also performed. These results showed that the catalyst dispersion, particle size, and the degree of reduction changed with different reduction gas compositions, which were resulted from the water partial pressures in reduction process that give varying degrees of interaction with the support. It has been suggested that the FTS activity of cobalt catalyst was directly dependent on the catalyst reducibility. A reduction gas with a molar ratio of H2/He = 1 was used to prevent the formation of Co-support compound during catalyst reduction. | Ali Karimi Ali Nakhaei Pour Farshad Torabi Behnam Hatami Ahmad Tavasoli Mohammad Reza Alaei Mohammad Irani | 2010 | Journal of Natural Gas Chemistry2010，19，5： | 1 |
| 15 | Ve-hicle Stability Enhancement - An Adaptive OptimalApproach to the Distribution of Tyre Forces显示文摘 | NARAGHI M ROSHANBlN A TAVASOLI A | 2010 | Au-tomobile Engineering2010，224，4： | 1 |
| 16 | Fischer-Tropsch synthesis over cobalt catalyst supported on carbon nanotubes in a slurry reactor显示文摘 | TAVASOLI A ABBASLOU R M M TREPANIER M DALAI A K | 2008 | Appl Catal A:Gen2008，345，2： | 1 |
| 17 | The effect of pomegranate extract on survival and peritoneal bacterial load in cecal ligation and perforation model of sepsis in rats显示文摘 | Tavasoli S Zamani AH Vafa M | 2014 | Int J Prey Med2014，5，1： | 1 |
| 18 | Deactivation behavior of ruthenium promoted Co/-A1203 catalysts in Fischer-Tropsch synthesis显示文摘 | Tavasoli A ABBASLOU R M M DALAI A K | 2008 | Appl Catal A:Gen2008，346，12： | 1 |
| 19 | Two-time scale control and observer design for trajectorying tracking of two cooperating robot manipulators moving a flexible beam 显示文摘 | Tavasoli Ali EghtesadMohammad Jafarian Hamed | 2009 | Ro- botics and Autonomous Systems2009，，57： | 1 |
| 20 | Mg2--induced adenosine-receptor mediated relaxations in mesenteric vascular beds of diabetic rats显示文摘 | Tavasoli RA Soltani N Keshavarz M | 2012 | Gen Physiol Biophys2012，，： | 1 |
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