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Articles by M. Gholami
Total Records ( 13 ) for M. Gholami
  H.R. Rahimi , M. Gholami , H.R. Khorram-Khorshid , F. Gharibdoost and M. Abdollahi
  Hepatoprotective effect and mechanisms of a novel selenium/electromagnetically treated multiherbal mixture named Setarud (IMODTM) in combination with silymarin (SM) a known hepatoprotective compound was investigated in acetaminophen-induced acute hepatic failure rat model. Animals were divided into five groups and pre-induced with phenobarbital (0.1 mg kg-1, i.p.) before administration of a single dose of acetaminophen (1 g kg-1, i.p.) except group 1 which was considered as normal. Group 2 was remained without treatment and considered as control while groups 3 to 5 were treated with SM (50 mg kg-1, p.o.), IMOD (30 mg kg-1, i.p.) and IMOD+SM, respectively 24 h post administration of acetaminophen. Blood was collected at 0, 24 and 72 h post acetaminophen treatment. Elevated serum aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase (ALP) confirmed hepatic failure induced by acetaminophen. After 48 h of treatment, the rats were anesthetized and the liver was removed and the right lobule was homogenized and then measured for catalase (CAT), malondialdehyde (MDA) and glutathione (GSH) value. Part of liver was left in paraffin for histopathology examination. CAT and GSH were significantly decreased in the acetaminophen-treated group while ALT, AST, ALP and MDA increased when compared to normals. Histopathological examination of acetaminophen-treated animals showed necrosis, inflammation, hyperplasia of kupffer and infiltration of mononuclear cells, dilation of sinusoids and disruption of hepatocytes, while treatment with IMOD+SM normalized protected hepatic architecture in accordance to biochemical results. Treatment of animals with IMOD and SM alone or in combinations considerably protected the hepatic failure by diminishing ALT, AST, ALP and MDA. Both IMOD and SM and their combination improved acetaminophen-induced histopathological hepatic damage. Conclusion is that combination of IMOD and SM considerably protect from acute hepatic failure via enzymatic and non-enzymatic mechanisms.
  M. Kazemi , M. Gholami , M. Asadi , S. Aghdasi and M. Almasi
  Short postharvest vase life is one of the most important problems on the cut flowers. The study was conducted to investigate the effect of salicylic acid at different concentrations on carnation flower longevity, Aminocyclopropanecarboxylate oxidase (ACC-oxidase, ACO) activity and SOD activity vase solution of cut flowers carnation in laboratory condition. The treatments were distilled water, salicylic acid (0,1.5, 2.5, 3.5 mM) and glutamine (0, 2 and 4 mM). Results show that salicylic acid 2.5 mM followed by glutamine 4 mM is more effective than salicylic acid 1.5, 3.5 and 4.5 mM alone in improving the vase life of cut carnation flowers. The percent of wilting was minimized as a result of using this combined treatment. However, the percent of wilting increased with the increase in concentrations of salicylic acid. 2.5 mM salicylic acid+4 mM glutamine retarded the chlorophyll as well as carbohydrate degradation during the postharvest life. The results showed that salicylic acid and glutamine in preservative mixture increased the SOD activity of cut flowers and reduced ACC-xidase activity, free proline accumulation, number of bacterial on vase solution, as compared to control.
  M. Kazemi , M. Gholami and F. Hassanvand
  To understand the factors that induce floral senescence in gerbera, this study has investigated the effects of various chemical agents on flower senescence. The experiment was carried out to investigate the effect of different concentrations of silicon, acetylsalicylic acid and glutamine on keeping quality and vase life of gerbera cut flowers. The vase were placed in chambers at 19°C, relative humidity about 70% and 14th photoperiod that was maintained using fluorescent lamps (light intensity of 15 μmol m-2 sec-1) at the top of the corolla. The recorded traits included Vase life, total chlorophyll content (SPAD reading), anthocyanin leakage, malondialdehyde content, ACC-Oxidase activity and water absorption. The experiments show that: 3 mM silicon had no significant influence but 1 and 2 mM silicon caused an increase on vase life. The results showed that silicon, acetylsalicylic acid and glutamine treatments increased cut-flower water absorption, fresh weight and vase life, while decreasing MDA content, ACC-oxidase activity and membrane premeability together with total delay of senescence and peroxidation of lipids.
  M. Kazemi , M. GHolami and F. Bahmanipour
  To understand the factors that induce floral senescence in carnation, we have investigated the effects of various chemical agents on flower senescence. The study was conducted to investigate the effect of silicon and acetylsalicylic acid at different concentrations on carnation flower longevity, ACC-oxidase activity and bacterial population vase solution of cut flowers carnation in laboratory condition. The treatments were distilled water, silicon (0, 1.5, 2.5, 3.5 mM) and acetylsalicylic acid (0, 1.5, 3 mM). Results show that 2.5 mM silicon followed by 3 mM acetylsalicylic acid is more effective than 1.5 and 3 mM silicon alone in improving the vase life of cut carnation flowers. The percent of wilting was minimized as a result of using this combined treatment. However, the percent of wilting increased with the increase in concentrations of silicon and acetylsalicylic acid. Silicon at level 2.5 mM retarded the chlorophyll as well as carbohydrate degradation during the postharvest life. The results showed that silicon and acetylsalicylic acid in preservative mixture reduced ACC-oxidase activity number of bacterial on vase solution significantly of cut flower in compared to control.
  L. S Rad and M. Gholami
 

This study examined the independent and combined effects of exercise training, weight loss and changes in dietary quality on the serum lipid profile in sedentary, healthy and overweight young women. 83 women 18-25 years with body mass index>25 were randomly assigned to four groups, control (C), diet (D), exercise (E) and exercise and diet (ED). Height, weight, per cent body fat (BF%), TC, HDL-C, TG and LDL-C were measured before and after an 8-week intervention period. Subjects in the two exercise groups walked five times a week, 45 min per session, at 60%-80% of maximum heart rate (MHR). Duration and intensity of exercise were gradually increased over a 3-week period from 25 to 30 min/sessions at 60%-65% of MHR during week 1 to 45 min at 70% to 80% MHR from weeks 4 through 8. Subjects in the two nonwalking groups (C and D) reported to the exercise facility 5 days per week for 45 min of stretching and mild range of motion calisthenics. The intent was to keep heart rate below 100 beats per minute. One-way ANOVA was the statistical test (=0.05). Relative to control group, the ED and D groups displayed a 4.2% and 4.1% reduction in body mass, 9% and 7% reduction in BF%, 29% and 26% reduction in TG. LDL-C fell by 12% in ED group. For each kg of weight loss there was a decrease of 0.05, 0.02 and 0.015 mg/dl in TC, LDL-C and TG respectively. No change of body mass occurred in E group. Exercise alone was insufficient to stimulate change in any lipid or lipoprotein measures. These results demonstrated that weight loss mostly was due to diet, because the exercise was the same in groups E and ED. The lipid profile improved and body mass decreased.

  M. A. Zazouli , S. Nasseri , A. H. Mahvi , M. Gholami , A. R. Mesdaghinia and M. Younesian
  The objectives of this research were to investigate the rejection efficiency of salt and hydrophobic fraction of natural organic matter, to study the flux decline behavior with a spiral wound nanofiltration membrane, and also to survey the influence of water chemistry on membrane performance. Experiments were conducted using a cross flow pilot-scale membrane unit with a full circulation mode. Humic acid was used as hydrophobic organic matter and NaCl as background electrolyte. Results showed that flux reduction increased with increasing ionic strength and humic acid concentration, and with lower pH. The rejection efficiency of organic and salt decreased with the decrease in pH and increase in ionic strength, because of osmotic pressure increase, leading to permeate flux decline and decrease in salt rejection. In addition, the improved salt rejection was likely due to Donnan exclusion by humic material close to membrane surfaces. The average rejection efficiency of humic acid and salt ranged between 91.2%-95.25% and 63.6%-80%, respectively. Dissolved organic carbon concentration was less than 0.57mg/L in permeate for all experiments. With increasing organic concentration, the charge of the membrane surface has become more negative due to the adsorption of organic foulants on the membrane surface, and thus increased the electrostatic repulsion. However, the increasing surface charge had the potential to result in a larger molecular weight cut-off of a fouled membrane due to membrane swelling which can lead to lower rejection solutes. Therefore, results of this study indicated that membrane fouling may significantly affect the rejection of organic and ion solute.
  M. Yazdani , M. Gholami , M. Zandieh and M. Mousakhani
  This study addresses the flexible job-shop scheduling problem to minimize makespan. In fact, the FJSP mainly presents two difficulties. The first one is to assign each operation to a machine out of a set of capable machines and the second one is to sequence the assigned operations on all machines. Hence, to solve this NP-hard problem, a simulated annealing algorithm is proposed. The meta-heuristic algorithm explores the solution space using a stochastic local search while trying to avoid local optima through accepting probabilistic moves to the worse solutions. The neighborhood search structures of assignment and sequencing are used for generating neighboring solutions to search the solution space. To evaluate the performance of the algorithm, twenty benchmark problems adopted from the literature are used. Consequently, the computational results validate the quality of present approach.
  M. Gholami
  In this study Daphnia magna enriched for three different time period (3, 6 and 9 h) and non-enriched Daphnia magna were fed to the whitefish fry (average weight 54.7±0.5 mg) during 14 days. A significant growth difference between fry fed with enriched and non-enriched Daphnia was observed (p<0.05), while survival rate did not significantly differ among the treatments (p<0.05). Furthermore, the highest pH stress resistance was found in those larvae fed with Daphnia enriched for 9 and 6 h (p<0.05). We observed that feeding of the whitefish larvae with HUFA-enriched Daphnia resulted in growth improvement compared to non-enriched Daphnia. Therefore, to achieve higher production, nutrition optimization of the whitefish larvae especially by using HUFA in daily foods and transferring it to fish body through live food is recommended for whitefish hatcheries. The result of this study proved that feeding the whitefish with live food containing high n-3 HUFA content increased larval resistance to pH stress.
  M.A. Zazouli , S. Nasseri , A.H. Mahvi , A.R. Mesdaghinia and M. Gholami
  Natural Organic Matters (NOMs) are abundant in natural water resources and in many ways may affect the unit operations in water treatment. Although, NOMs are considered harmless but they have been recognized disinfection by-products precursors (DBPs) during the chlorination process. Formation of DBPs highly depends on the composition and concentration of NOM, which can be broadly divided into two fractions of hydrophobic (humic) and hydrophilic (non-humic) substances. The objective of this study was to determine Natural organic matter and its fractions concentration in the surface water sources of Tehran. Water sampling was conducted monthly between May to July 2006 in three rivers Lar, Jajrood and Karaj as the main drinking water supplying sources in Tehran. Quantitative parameters of pH, EC, UV254 and DOC were studied based on to standard methods. The XAD-7 resin method was used for fractionation of NOM. Results showed that NOM concentrations in Lar, Jajrood and Karaj rivers were 8.53, 12.9 and 11.3 mg L-1, respectively. The HPO (hydrophobic) fraction was predominant compared to the HPI (hydrophilic) fraction in the all of water samples. The mean of total percent of HPO and HPI fractions were about 57 and 43%, respectively. Since the hydrophobic NOM fraction exhibits higher trihalomethane formation potential (THMFP) than hydrophilic NOM, Tehran water chlorination exhibits higher THMFP than haloacetic acid formation potential (HAAFP). The information obtained from this study may be further employed in the design of the control technique and management strategies for the water treatment plant, especially for DBPs reduction.
  Mohsen Kazemi , Hanifeh Seyed Hajizadeh , M. Gholami , M. Asadi and S. Aghdasi
  Short postharvest vase life is one of the most important problems on the cut flowers. In this study we investigated the effect of some essential oils, citric acid, malic aid and nickel in extending the vase-life of lisianthus (Eustoma grandiflorum Mariachii. cv. Blue) flowers. The treatments were distilled water, nickel (0, 1 and 2 mM), essential oils of thyme (Thymus vulgaris) (50, 100 and 150 mg L-1), citric acid (0, 100 and 150 mg L-1) and malic aid (0, 1.5 and 2.5 mM). Results showed that solution containing 2 mM nickel+2.5 mM malic acid and 150 mg L-1 essential oils of Thyme could increase flower longevity as compared to control. The results also revealed that malic acid and nickel treatments increased cut-flower water absorption while decreasing ACC-oxidase (Aminocyclopropanecarboxylate oxidase) activity and premeability together with total delay of senescence and peroxidation of lipids. Chlorophyll content and ACC-oxidase activity in the cut flower in solution containing citric acid and essential oils were not significantly different than control. It is suggested the application of nickel, essential oils of Thyme and malic aid in preservative solutions for Lisianthus flowers maintained the vase life of flowers for a longer period.
  M. Gholami and M. Rahemi
  We evaluated drought response of miniature rose Meshkinjan under open door environment during a period of water deficit (21 days) and subsequent rewatering. After 21 days of drought, stem water potential, relative water content, turgid weight to dry weight ratio and starch concentration decreased significantly compared with control. While, the amount of proline and potassium increased significantly that could indicate ability of osmotic adjustment in this species. Also the increase in water potential and relative water content values after rewatering period indicate the good recovery of this plant.
  M. Gholami , S.M.R. Fatemi , M. Falahi , A. Esmaili and A. Mashinchiyan
  In this survey, the individual and mixed effects of heavy metals such as copper and cadmium and detergent (LAS) on 1 g white fish Fry (Rutilus frisii Kutum) were studied with 6 treatments and one blank in 3 replications using OECD method in the laboratory and concentration limits were determined with logarithmic method for Cadmium (0.1-0.5), copper (1-5) and LAS (10-19) mg L-1. Finally, the achieved results were calculated with Probit analysis and Correlation coefficient was regarded for Cadmium 0.93, copper 0.92 and LAS 0.98 and in mixture of Cadmium and LAS 0.93 and mixture of copper and LAS 0.98. The amounts of LC10, LC50 and LC90 and permissible limits of above mentioned pollutants were calculated too. Copper effect on white fish fry caused LC10 = 1.83, LC50 = 4.02, LC90 = 8.79 Cadmium effect caused LC10 = 0.11, LC50 = 0.21, LC90 = 0.34; LAS caused LC10 = 5.91, LC50 = 11.62, LC90 = 22.71; mixture of LAS and Cadmium caused LC10 = 0.017, LC50 = 0.047, LC90 = 0.12; mixture of LAS and copper caused LC10 = 0.02, LC50 = 0.09, LC90 = 0.37. Hierarchically, the amounts of pollutants permissible limits for Cadmium effect on white fish fry were 0.021, for copper 0.4, for LAS 1.16 and mixture of Cadmium and LAS 0.004 and mixture of LAS and copper 0.009.
  M. Kazemi , M. Gholami , M. Asadi and S. Aghdasi
  Short postharvest vase life is one of the most important problems on the cut flowers. The aim of this study was to evaluate the efficacy of silicon, nickel and acetylsalicylic acid and their interaction on extending the vase life, total chlorophyll content, ACC-oxidase (Aminocyclopropanecarboxylate oxidase, ACO) activity, anthocyanin leakage, membrane stability and malondialdehyde (MDA) content of Cut rose flowers. The treatments were distilled water, silicon (0, 1.5, 2.5 mM), acetylsalicylic acid (0, 1,1.5 mM) and nickel (0, 1, 2 mM). Vase life in solution containing 1.5 mM silicon and 1 mM acetylsalicylic acid didn’t have significant difference than control. The results showed that silicon, acetylsalicylic acid and nickel treatments increased cut flower water absorption, fresh weight and vase life, while decreasing malondialdehyde content, ACC-oxidase activity and membrane premeability together with total delay of senescence and peroxidation of lipids. Our results suggest the application of silicon, acetylsalicylic acid and nickel in preservative solutions for rose flowers maintained the vase life of flowers for a longer period.
 
 
 
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