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Gholami M, Shirzadi H, Taherpour K, Rahmatnejad E, Shokri A, Khatibjoo A. Effect of emulsifier on growth performance, nutrient digestibility, intestinal morphology, faecal microbiology and blood biochemistry of broiler chickens fed low-energy diets. Vet Med Sci 2024; 10:e1437. [PMID: 38555574 PMCID: PMC10981915 DOI: 10.1002/vms3.1437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/24/2024] [Accepted: 03/10/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND This study hypothesizes that a natural multicomponent emulsifier (Lipidol) could improve production performance in broiler chickens by aiding lipid digestion and addressing digestive system limitations. OBJECTIVES The study aimed to investigate the effects of dietary emulsifier inclusion on the growth performance, nutrient digestibility, intestinal morphology, faecal microbiology, blood biochemistry and liver enzyme activities of broiler chickens fed low-energy diets. METHODS The experiment involved 144 one-day-old male broiler chickens split into 4 treatments. Four diets were used: standard metabolizable energy (ME) as a control diet and three low-ME diets, reducing by 100 kcal/kg by adding 0.5, 1 and 1.5 g/kg of exogenous emulsifier (Em). RESULTS No significant differences were observed in body weight gain and feed intake. However, during the finisher period (25-42 days), supplementation emulsifier to low-ME diets notably improved feed efficiency. Although crude protein, organic matter and ash digestibility remained unaffected, dry matter (DM) digestibility significantly increased in broilers fed low-ME diets with emulsifier. Broilers receiving 0.5 g/kg of emulsifier showed the highest villus width and surface area values. Moreover, including 1.5 g/kg of emulsifier led to the highest villus height to crypt depth ratio. Faecal microbiota, blood biochemistry and liver enzyme activities showed no significant differences. CONCLUSIONS Emulsifier supplementation compensated for the energy reduction and enhanced performance, DM digestibility and some intestinal morphology parameters in broiler chickens fed low-ME diet. Using 0.5 g/kg of emulsifier per 100 kcal of ME reduction in broiler diets is suggested.
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Affiliation(s)
| | - Hassan Shirzadi
- Department of Animal ScienceFaculty of AgricultureIlam UniversityIlamIran
| | - Kamran Taherpour
- Department of Animal ScienceFaculty of AgricultureIlam UniversityIlamIran
| | - Enayat Rahmatnejad
- Department of Animal ScienceFaculty of Agriculture and Natural ResourcesPersian Gulf UniversityBushehrIran
| | - Alinaghi Shokri
- Department of Animal ScienceFaculty of AgricultureIlam UniversityIlamIran
| | - Ali Khatibjoo
- Department of Animal ScienceFaculty of AgricultureIlam UniversityIlamIran
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Wahood W, Gholami M, Akhras A, Baghestani A, Brinjikji W. Abstract No. 233 Nationwide trends in utilization of carotid artery stenting and angioplasty in tandem occlusion stroke. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Karami V, Albosof M, Najarian M, Gholami M. Assessment of Commercially Available In-plane Bismuth Breast Shields for Clinical Use in Patients Undergoing Thoracic Computed Tomography. Hong Kong Journal of Radiology 2021. [DOI: 10.12809/hkjr2117090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- V Karami
- Student Research Committee, Dezful University of Medical Sciences, Dezful, Iran
| | - M Albosof
- Department of Medical Engineering, Islamic Azad University, Dezful Branch, Iran
| | - M Najarian
- Student Research Committee, Dezful University of Medical Sciences, Dezful, Iran
| | - M Gholami
- Department of Medical Physics, Lorestan University of Medical Sciences, Khorramabad, Iran
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Bazrafkan L, Kaviani M, Gholami M, Shokrpour N. Comparison of Lecturing and Multimedia-Based Learning on the Knowledge and Remembrance of Breast Cancer Topics in Midwifery Students of Shiraz University of Medical Sciences in 2016. Bangladesh J Med Sci 2020. [DOI: 10.3329/bjms.v19i4.46630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background and Purpose: One of the most important principles of training is the appropriate teaching method. The method used plays a key role in the process of teaching and learning and affects the students’ learning while knowledge of these methods and choosing the best of them lead to improvement in education. The aim of this study was to compare the effect of two lecturebased and multimedia-based training methods on learning, knowledge and remembrance of breast cancer topics in students of Shiraz University of Medical Sciences in 2016.
Methods: In a quasi-experimental study, 42 midwifery students were assigned to two groups for training (25 students in multimedia-based method and 18 in lecture-based method). The students’ knowledge was measured using 20 multiple-choice questions designed by the researcher in three stages: pre-test, post-test and test-retest (2 months after the intervention). Then, the data were analyzed using SPSS, 19, at a significance level of 95%.
Findings: There was no significant difference between the students’ mean age and their mean score in the course of women’s diseases in the two groups. No difference was observed in the mean scores in the two groups (p>0.05) before the intervention, but after the intervention the level of students’ knowledge in both groups increased (p=0.000). In the post-test stage, there was a significant difference between the scores in the multimedia-based and lecture-based groups (p=0.000).
Results: The results indicated the effectiveness of multimedia knowledge and breast training method so that this method showed a more lasting knowledge after two months of training.
Bangladesh Journal of Medical Science Vol.19(4) 2020 p.710-716
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Gholami M, Chirani AS, Razavi S, Falak R, Irajian G. Immunogenicity of a fusion protein containing PilQ and disulphide turn region of PilA from Pseudomonas aeruginosa in mice. Lett Appl Microbiol 2017; 65:439-445. [PMID: 28857243 DOI: 10.1111/lam.12796] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 08/10/2017] [Accepted: 08/23/2017] [Indexed: 11/30/2022]
Abstract
Interference with bacterial adhesion is a new means to prevent or treat bacterial infections. In this experimental study we evaluated the immunogenic properties of a chimeric protein composed of PilQ and disulphide turn region of PilA from Pseudomonas aeruginosa in mice as an anti-adhesion based vaccine. First of all, a chimeric bivalent protein composed of PilQ and PilA was constructed and following subcutaneous immunization with merely the purified protein or in its admixed form with alum, the immunogenicity of the chimeric antigen was assessed in BALB/c mice. Then, the characteristics of the developed antibodies were studied by ELISA. Furthermore, the immunoreactivity of the purified recombinant protein was confirmed by immunoblotting. Alum as a common adjuvant boosted immunogenicity of the construct, resulting significantly greater anti-pili IgG titre. Mice antibody response consisted of IgG1, IgG2a, IgG2b and IgG3 subtypes with predominance of IgG1 subclass. The developed antibodies were capable to inhibit motility of PAO1 strain. In conclusion, our primary results revealed that the designed recombinant protein is a protective construct and may be used as a potential candidate for prophylactic purposes against P. aeruginosa infection. SIGNIFICANCE AND IMPACT OF THE STUDY In this study we examined the potential of integrated PilQ/PilA (QA) antigen as a vaccine candidate against Pseudomonas aeruginosa. Nowadays, anti-adhesion based vaccines are considered as new means to prevent or treat bacterial infections. Our study revealed that chimeric protein PilQ and disulphide turn region of PilA triggers production of specific antibodies. This humoral immune responses augmented when QA was administered in combination with an adjuvant. The results demonstrated efficacy of the designed recombinant chimeric antigen as an effective candidate in prevention of P. aeruginosa infection.
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Affiliation(s)
- M Gholami
- Department of Microbiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - A S Chirani
- Department of Medical Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - S Razavi
- Department of Microbiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - R Falak
- Immunology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - G Irajian
- Department of Microbiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran
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Gholami M. Interrogator independence and challenges of his lack of independence in the judicial system of Iran and France. J Fundam and Appl Sci 2017. [DOI: 10.4314/jfas.v9i1s.690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Gholami M, Abbaszadeh A, Khanipour Khayat Z, Anbari K, Baharvand P, Gharravi AM. Honey improves spermatogenesis and hormone secretion in testicular ischaemia-reperfusion-induced injury in rats. Andrologia 2017; 50. [PMID: 28370451 DOI: 10.1111/and.12804] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2017] [Indexed: 11/27/2022] Open
Abstract
This study was conducted to survey the protective effect of pre-treatment with Persian honey during post-ischaemia reperfusion on ischaemia-reperfusion (IR)-induced testis injury. Animals were divided into four groups of IR, honey + ischaemia- reperfusion (HIR), vitamin C + ischaemia- reperfusion (VIR) and carbohydrates + ischaemia- reperfusion (CIR). The testes were examined for spermatogenesis index. Detection of single- and double-stranded DNA breaks at the early stages of apoptosis was performed. Total serum concentration of FSH, LH and testosterone was measured using ELISA. All data were expressed as mean ± SD in each group, and significance was set at p ≤ .05. Spermatogenesis index was significant in the HIR group (p < .001). Serum levels of FSH and LH were significantly higher in the CIR and HIR groups. Serum levels of testosterone were significantly higher in VIR and HIR groups. Apoptotic cells in IR and CIR groups increased significantly statistically (p < .001), while in HIR and VIR groups, the number of apoptotic cells decreased and the positive cells of TUNEL staining were detected in spermatocytes and spermatid. The present study indicates that honey decreases the cellular damage and apoptosis during testicular I/R injury, with significant protective effects on reproductive hormone production.
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Affiliation(s)
- M Gholami
- Razi Herbal Medicines Research Center and Department of Anatomy, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - A Abbaszadeh
- Department of Surgery, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Z Khanipour Khayat
- Razi Herbal Medicines Research Center and Department of Anatomy, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - K Anbari
- Department of Social Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - P Baharvand
- Department of Social Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - A M Gharravi
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
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Gholami M, Hafezian SH, Rahimi G, Farhadi A, Rahimi Z, Kahrizi D, Kiani S, Karim H, Vaziri S, Muhammadi S, Veisi F, Ghadiri K, Shetabi H, Zargooshi J. Allele specific-PCR and melting curve analysis showed relatively high frequency of β-casein gene A1 allele in Iranian Holstein, Simmental and native cows. Cell Mol Biol (Noisy-le-grand) 2016; 62:138-143. [PMID: 27894411 DOI: 10.14715/cmb/2016.62.12.23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Accepted: 11/26/2016] [Indexed: 11/18/2022]
Abstract
There are two allelic forms of A1 and A2 of β-casein gene in dairy cattle. Proteolytic digestion of bovine β-casein A1 type produces bioactive peptide of β-casomorphin-7 known as milk devil. β-casomorphin-7 causes many diseases, including type 1 diabetes, cardiovascular disease syndrome, sudden death and madness. The aim of the present study was to determine the different allelic forms of β-casein gene in Iranian Holstein, Simmental and native cattle in order to identify A1 and A2 variants. The blood samples were collected randomly and DNA was extracted using modified salting out method. An 854 bp fragment including part of exon 7 and part of intron 6 of β-casein gene was amplified by allele specific polymerase chain reaction (AS-PCR). Also, the accuracy of AS-PCR genotyping has been confirmed by melting temperature curve analysis using Real-time PCR machinery. The comparison of observed allele and genotype frequency among the studied breeds was performed using the Fisher exact and Chi-squared test, respectively by SAS program. Obtained results showed the A1 allele frequencies of 50, 51.57, 54.5, 49.4 and 46.6% in Holstein, Simmental, Sistani, Taleshi and Mazandarani cattle populations, respectively. The chi-square test was shown that no any populations were in Hardy-Weinberg equilibrium for studied marker locus. Comparison and analysis of the test results for allelic frequency showed no any significant differences between breeds (P>0.05). The frequency of observed genotypes only differs significantly between Holstein and Taleshi breeds but no any statistically significant differences were found for other breeds (P>0.05). A relatively high frequency of β-casein A1 allele was observed in Iranian native cattle. Therefore, determine the genotypes and preference alleles A2 in these native and commercial cattle is recommended.
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Affiliation(s)
- M Gholami
- Laboratory for Molecular Genetics and Cytogenetics, Department of Animal Sciences, Faculty of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
| | - S H Hafezian
- Laboratory for Molecular Genetics and Cytogenetics, Department of Animal Sciences, Faculty of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
| | - G Rahimi
- Laboratory for Molecular Genetics and Cytogenetics, Department of Animal Sciences, Faculty of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
| | - A Farhadi
- Laboratory for Molecular Genetics and Cytogenetics, Department of Animal Sciences, Faculty of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
| | - Z Rahimi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - D Kahrizi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - S Kiani
- Research Institute of Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran
| | - H Karim
- Department of Cardiology, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - S Vaziri
- Department of Infectious Diseases. Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - S Muhammadi
- Department of Cardiology, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - F Veisi
- Department of Obstetrics and gynecology. Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - K Ghadiri
- Nosocomial Infections Research Center. Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - H Shetabi
- Department of Anesthesiology. Isfahan University of Medical Sciences, Isfahan, Iran
| | - J Zargooshi
- Department of Sexual Medicine, The Rhazes Center for Research in Family Health and Sexual Medicine; Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Baeeri M, Nigjeh MN, Niaz K, Rahimifard M, Niri SG, Rezvanfar M, Gholami M, Abdollahi M. Cellular and molecular mechanisms of aging and oxidative stress-induced senescence in rat embryonic fibroblast cells by phosalone and hydrogen peroxide. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pirnia A, Parivar K, Hemadi M, Yaghmaei P, Gholami M. Stemness of spermatogonial stem cells encapsulated in alginate hydrogel during cryopreservation. Andrologia 2016; 49. [DOI: 10.1111/and.12650] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2016] [Indexed: 01/15/2023] Open
Affiliation(s)
- A. Pirnia
- Department of Biology; Science and Research Branch; Islamic Azad University; Tehran Iran
| | - K. Parivar
- Department of Biology; Science and Research Branch; Islamic Azad University; Tehran Iran
| | - M. Hemadi
- Fertility and Infertility Research Center; Ahvaz Jundishapur University of Medical Sciences; Ahvaz Iran
| | - P. Yaghmaei
- Department of Biology; Science and Research Branch; Islamic Azad University; Tehran Iran
| | - M. Gholami
- Razi Herbal Medicine Research center and department of Anatomical sciences; Lorestan University of Medical Sciences; Khorramabad Iran
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Gholami M, Ravanshad M, Alavian SM, Baesi K, Moallemi S. [Evaluation of miR-122 level in the plasma of chronically HCV infected patients]. Mol Biol (Mosk) 2016; 50:279-83. [PMID: 27239848 DOI: 10.7868/s0026898416020075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 03/01/2015] [Indexed: 11/23/2022]
Abstract
MicroRNAs (miRNAs) are small non-coding RNA molecules, which have an important function in regulating RNA stability and gene expression. They also can circulate in a cell-free form in the blood thatmakes them potential disease markers. The liver contains various classes of miRNAs in which miR-122 accounts for about 70% of all miRNAs and it has been proved that its level increases in case of liver damage. Here, we investigated plasma levels of miR-122 as a useful disease parameter in patients with chronic hepatitis C (CHC) infection. Thirty five hemophilia and thalassemia patients with CHC were studied. The total RNA was extracted from plasma samples, and miR-122 levels were measured by qPCR and then compared with the specific liver markers. The plasma levels of alanine transaminase (ALT) and aspartate transaminase(AST) were correlated with plasma miR-122 level in CHC patients, and the level of circulating miR-122 in healthy individual groups were rarely lower than those of patients with CHC. In our study, miR-122 levels correlated well with markers of liver inflammatory activity. Plasma miR-122 can be assumed to be another marker in liver similar to the currently used specific markers such as ALT and AST for evaluation of liver damage in hepatitis C virus (HCV) infected patients. Moreover, the correlation between miR-122 and ALT was shown to be higher than between miR-122 and AST.
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Affiliation(s)
- M Gholami
- Department of Medical Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, 14115-111, Iran
| | - M Ravanshad
- Department of Medical Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, 14115-111, Iran.,
| | - S-M Alavian
- Founder of Iran Hepatitis Network and Tehran Hepatitis Center, Baqiyatallah Research Center for Gastroenterology and Liver Diseases, Baqiyatallah University of Medical Sciences, Tehran, 19945-581, Iran
| | - K Baesi
- Department of Medical Virology, Iranian Research Center for HIV AIDS (IRCHA) Iranian Institute for Reduction of High-Risk Behaviors, Tehran University of Medical Sciences (TUMS), Tehran, 14197-313, Iran
| | - S Moallemi
- Department of Medical Virology, Iranian Research Center for HIV AIDS (IRCHA) Iranian Institute for Reduction of High-Risk Behaviors, Tehran University of Medical Sciences (TUMS), Tehran, 14197-313, Iran
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Gholami M, Ravanshad M, Alavian SM, Baesi K, Moallemi S. Evaluation of miR-122 level in the plasma of chronically HCV infected patients. Mol Biol 2016. [DOI: 10.1134/s0026893316020072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mohammadi M, Guan J, Khodagholi F, Yans A, Khalaj S, Gholami M, Taghizadeh GH, Aliaghaei A, Abdollahi M, Ghahremani MH, Sharifzadeh M. Reduction of autophagy markers mediated protective effects of JNK inhibitor and bucladesine on memory deficit induced by Aβ in rats. Naunyn Schmiedebergs Arch Pharmacol 2016; 389:501-10. [PMID: 26899864 DOI: 10.1007/s00210-016-1222-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 02/10/2016] [Indexed: 12/15/2022]
Abstract
Autophagy, the process of self-degradation of cellular components, has an important role in neurodegenerative diseases, such as Alzheimer's disease. In this study, we investigated the effects of SP600125 as c-Jun N-terminal kinase (JNK) inhibitor and bucladesine as a cyclic adenosine 3',5'-monophosphate (cAMP) analog on spatial memory and expression of autophagic factors in Aβ-injected rats. Male Wistar rats were used. Rats were randomly allocated into five groups as following: amyloid beta (Aβ)-only group, Aβ + SP600125 (30 μg/1 μ/side, n = 7) and/or bucladesine (100 μM/1 μl/side, n = 7), and the normal control (vehicle only) group. The treatments were administered bilaterally to the CA1 sub-region of the hippocampus stereotaxically. Spatial reference memory was performed using Morris Water Maze 21 days later. The expression of authophagy markers (beclin1, Atg7, Atg12, and LC3 II/LC3 I) in the hippocampus was evaluated using western blotting. Compared to the vehicle group, Aβ administration reduced spatial reference learning (P < 0.001) and memory (P < 0.01) and upregulated the expression of beclin1, Atg7, Atg12, and LC3 II/I (P < 0.0001). Compare to Aβ-only group, the administration of SP600125 and/or bucladesine improved spatial reference learning (P < 0.001) and memory (P < 0.01). Compared to the Aβ-only group, the treatment with SP600125 and/or bucladesine also reduced beclin1, Atg7, Atg12, and LC3 II/I (P < 0.0001) which was similar to amount of normal rats. In summary, it seems that the improvement of spatial memory by SP600125 and/or bucladesine in Aβ-injected rats is in relation with normalizing of autophagy to the physiologic level, possibly through neuroprotection and/or neuroplasticity.
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Affiliation(s)
- M Mohammadi
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - J Guan
- Liggins Institute, University of Auckland, 85 Park Road, Grafton, Auckland, New Zealand.,Centre for Brain Research, Faculty of Medicine and Health Sciences, University of Auckland, 85 Park Road, Grafton, Auckland, New Zealand.,Gravida National Centre for Growth and Development, University of Auckland, Auckland, New Zealand
| | - F Khodagholi
- Neuroscience Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran.,Neurobiology Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran
| | - A Yans
- Neuroscience Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran.,Neurobiology Research Centre, ShahidBeheshti University of Medical Sciences, Tehran, Iran
| | - S Khalaj
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - M Gholami
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - G H Taghizadeh
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran.,Department of Neuroscience, Faculty of Advanced Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - A Aliaghaei
- Department of Anatomy and Cell Biology, School of Medicine, ShahidBeheshti University of Medical Sciences, Tehran, Iran
| | - M Abdollahi
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - M H Ghahremani
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran
| | - M Sharifzadeh
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, Iran. .,Department of Neuroscience, Faculty of Advanced Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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15
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Affiliation(s)
- M. Gholami
- Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - G.B. Gharehpetian
- Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - M. Mohammadi
- Department of Power and Control Engineering, School of Electrical and Computer Engineering, Shiraz University, Shiraz, Fars, Iran
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Assadollahi V, Gholami M, Zendedel A. C. zeylanicum aqueous extract induced apoptosis in the human myelocytic leukemia cell line (THP-1). ACTA ACUST UNITED AC 2015; 116:132-5. [PMID: 25665482 DOI: 10.4149/bll_2015_026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the effect of C. zeylanicum aqueous extract on cell growth in the human myelocytic leukemia cell line (THP-1). BACKGROUND Today, application of Cinnamon for treatment of cancer investigates extensively. Cinnamon has antioxidant, anti-apoptotic and anti-inflammatory properties. METHODS In this experimental study, THP-1 was incubated in 2, 1, 0.1 and 0.01 mg/ml C. zeylanicum solutions for 24, 48 and 72 hours. Cell cycle was assessed with flow cytometry. Apoptotic cells were identified by Hoechst 33342 staining. Cell proliferation was assessed by the MTT assay. The data were analyzed using descriptive statistics and analytical tests. RESULTS Samples that supplemented with 0.1 mg/ml C. zeylanicum aqueous extract enhanced induction of apoptosis in THP-1 cell line compared to samples that supplemented with 2, 1 and 0.01 mg/ml. According to flow cytometry analysis, after 24 and 72 hours of incubation in 0.1 and 2 mg/ml C. zeylanicum aqueous extract, respectively, the amount of cells in apoptosis phase was higher than that in the control sample. CONCLUSION Supplemented C. zeylanicum aqueous extract induced apoptosis in the human myelocytic leukemia cell line (Fig. 4, Ref. 20).
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Gholami M, Etemadifar Z, Bouzari M. Isolation a new strain of Kocuria rosea capable of tolerating extreme conditions. J Environ Radioact 2015; 144:113-119. [PMID: 25839781 DOI: 10.1016/j.jenvrad.2015.03.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 01/01/2015] [Accepted: 03/10/2015] [Indexed: 06/04/2023]
Abstract
A new actinobacterial strain was isolated from Ab-e-Siah spring (dark water) taken from the Ramsar city in Iran, and subjected to several stress conditions investigation. The isolate, named MG2 strain, was Gram-positive, aerobic, diplococci or tetrad shaped, non-spore forming and non-motile. Phylogenetic analysis of the isolate using 16S rDNA sequence indicated that the organism matched best with the genus Kocuria and the highest sequence similarities (98.55%) being found with Kocuria rosea. The 16S rDNA sequence determined in this study has been deposited in the NCBI database with the accession no. JX534199, K. rosea strain MG2. The isolated strain was an alkaliphilic-mesophilic bacterium because the optimal growth was observed at pH 9.2 and temperature of 28 °C under aerobic condition. MG2 was a halotolerant strain and tolerated maximally to 15% NaCl concentraion. Viability analysis by flow cytometry indicated that this strain had highly resistance to UV-C radiation and moderately resistance to desiccation after 28 days. The viability of K. rosea strains MG2 and Deinococcus radiodurans R1 were determined D87 and D98 according to D index, respectively, by a dose radiation 25 J/cm (Appukuttan et al., 2006). Thus the UV resistance of strain MG2 was comparable with representative radiation resistant Deinococcus. Also MG2 was grown at 1-4% of H2O2 as an oxidant agent. This research is the first study on multiple extreme resistance of Kocuria rosea new strain (MG2) isolated in Iran.
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Affiliation(s)
- M Gholami
- Department of Biology, Faculty of Sciences, University of Isfahan, Hezarjarib St., Azadi Sq., 81746-73441, Isfahan, Iran
| | - Z Etemadifar
- Department of Biology, Faculty of Sciences, University of Isfahan, Hezarjarib St., Azadi Sq., 81746-73441, Isfahan, Iran.
| | - M Bouzari
- Department of Biology, Faculty of Sciences, University of Isfahan, Hezarjarib St., Azadi Sq., 81746-73441, Isfahan, Iran
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Gholami M, Etemadifar Z. Isolation and characterization of a novel strain of genus Dietzia capable of multiple-extreme resistance. Microbiology (Reading) 2015; 84:389-397. [DOI: 10.1134/s0026261715030054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023] Open
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Rahmani H, Gholami M, Mahvi AH, Ali-Mohammadi M, Rahmani K. Tinidazol antibiotic degradation in aqueous solution by zero valent iron nanoparticles and hydrogen peroxide in the presence of ultrasound radiation. J WATER CHEM TECHNO+ 2015. [DOI: 10.3103/s1063455x14060101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Gholami M, Pakdaman A, Jafari A, Virtanen JI. Knowledge of and attitudes towards periodontal health among adults in Tehran. East Mediterr Health J 2014; 20:196-202. [PMID: 24950078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 08/13/2013] [Indexed: 06/03/2023]
Abstract
Determining what people know and believe about periodontal health and disease is important in order to establish prevention practices. This study aimed to assess knowledge of and attitudes towards periodontal health among adults in Tehran, Islamic Republic of Iran. We conducted a cross-sectional face-to-face interview survey in 2011 of 791 adults aged 18-50 years using a stratified, multistage sampling method. We recorded demographic characteristics including age, sex, education, marital status, employment and economic status (housing density). The lowest percentage of correct answers was related to the definition of dental plaque (11.6%) and the highest was for the role of the dental visit in prevention (92.8%). Female sex, university education and higher economic status were significantly associated with a higher mean score on periodontal health knowledge. The regression analysis showed that positive attitudes were associated with higher periodontal health knowledge and having university education. In this study positive attitudes towards prevention were related to better knowledge.
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Affiliation(s)
- M Gholami
- Department of Community Oral Health, School of Dentistry, Tehran University of Medical Sciences, Islamic Republic of Iran; Department of Oral Public Health, Institute of Dentistry, University of Helsinki, Helsinki, Finland
| | - A Pakdaman
- Department of Community Oral Health, School of Dentistry, Tehran University of Medical Sciences, Islamic Republic of Iran
| | - A Jafari
- Department of Community Oral Health, School of Dentistry, Tehran University of Medical Sciences, Islamic Republic of Iran
| | - J I Virtanen
- Institute of Dentistry, University of Oulu; Oulu University Hospital, Oulu, Finland
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Ghasemi O, Ghadimi MR, Ghasemi V, Gholami M, Ghanbari Adivi H. Inhibition Effect of Benzaldehyde Schiff Bases on Mild Steel Corrosion in Hydrochloric Acid: Electrochemical and Surface Analyses. J DISPER SCI TECHNOL 2014. [DOI: 10.1080/01932691.2014.896218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gholami M, Pakdaman A, Jafari A, Virtanen J. Knowledge of and attitudes towards periodontal health among adults in Tehran. East Mediterr Health J 2014. [DOI: 10.26719/2014.20.3.196] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ghasemi O, Gholami M, Ghadimi MR, Ghasemi V. Investigation of the Inhibition Effect of 2-mercaptobenzothiazole on Mild Steel Corrosion in Hydrochloric Acid: Thermodynamic, Electrochemical, and Surface Analyses. J DISPER SCI TECHNOL 2014. [DOI: 10.1080/01932691.2014.880351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Rahmani H, Gholami M, Mahvi AH, Alimohammadi M, Azarian G, Esrafili A, Rahmani K, Farzadkia M. Tinidazole Removal from Aqueous Solution by Sonolysis in the Presence of Hydrogen Peroxide. Bull Environ Contam Toxicol 2014; 92:341-6. [PMID: 24420343 DOI: 10.1007/s00128-013-1193-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 12/31/2013] [Indexed: 12/07/2022]
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Gholami M, Yosefi MH, Behkami S, Talei Bavil Olyai MR, Arslan Y, Bakirdere S, Ataman OY. Gas-Screen Slotted Quartz Tube Atomic Absorption Spectrometry: A Remedy for Reducing Interference Effects of Calcium and Chromium. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.747093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ningxu Cai, Gholami M, Litao Yang, Brennan RW. Application-Oriented Intelligent Middleware for Distributed Sensing and Control. ACTA ACUST UNITED AC 2012. [DOI: 10.1109/tsmcc.2011.2174982] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Gholami M, Pakdaman A, Virtanen JI. Common Perceptions of Periodontal Health and Illness among Adults: A Qualitative Study. ISRN Dent 2012; 2012:671879. [PMID: 23029620 PMCID: PMC3458291 DOI: 10.5402/2012/671879] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Accepted: 08/22/2012] [Indexed: 01/22/2023]
Abstract
Objective. Our aim was to explore perceptions of periodontal health and illness and to examine attitudes and beliefs regarding prevention of gum diseases among Iranian adults. Methods. Our qualitative approach included focus-group discussions among adults aged 18 and above based on convenient and purposive sampling in Tehran. Transcripts of the four focus-group discussions were analyzed by two independent reviewers using a content analysis method. Results. Two major themes in the analyses emerged: the common perception of periodontal health and illness and the attitude towards prevention. The study demonstrated the subjects' good understanding of prevention of periodontal disease, but their lack of knowledge of the aetiology of the diseases, and an inability to differentiate aetiology, symptoms, and prevention of dental caries and periodontal disease. Conclusion. This study revealed a need for oral health education among Iranian adults to improve their knowledge and change their attitudes to achieve deeper understanding of the aetiology and prevention of periodontal disease. Health promotion programs should address misconceptions about prevention of gum disease.
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Affiliation(s)
- M Gholami
- Department of Community Oral Health, School of Dentistry, Tehran University of Medical Sciences, P.O. Box 1439955991, Tehran, Iran ; Department of Oral Public Health, Institute of Dentistry, University of Helsinki, P.O. Box 41, 00014 Helsinki, Finland
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Faraji Z, Zamiri M, Rowghani E, Akhlaghi A, Jafarzadeh M, Bayat A, Gholami M. Effect of feeding olive-pulp silage on the seminal characteristics and fatty acid profile of the sperm plasma membrane in Iranian fat-tailed sheep. Small Rumin Res 2012. [DOI: 10.1016/j.smallrumres.2011.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Saeidi R, Banihashem A, Hammoud M, Gholami M. Comparison of oral recombinant erythropoietin and subcutaneous recombinant erythropoietin in prevention of anemia of prematurity. Iran Red Crescent Med J 2012; 14:178-81. [PMID: 22737576 PMCID: PMC3372031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 11/04/2011] [Indexed: 11/24/2022]
Abstract
BACKGROUND Premature neonates are at risk for severe anemia and erythropoietin is the most important hormone in erythropoiesis. The aim of this study was to evaluate the influence of oral recombinant human erythropoietin (rhEPO) in proving erythropoiesis in neonates. METHODS This was a randomized clinical trial study. Thirty neonates were enrolled from September 2007 to September 2008. The first group received oral rhEPO and Fe and the second, subcutaneous rhEPO and Fe. The patients' Hb, HCT and the need to blood transfusion were recorded. We included all infants with gestational age <34 weeks, birth weight <1500 gr, without respiratory distress (O2 Saturation> 85%, FiO2 of 30%), full feeding tolerance so that oral Fe can be administrated. RESULTS In first group (oral=PO), 65% of neonates were female and 35% were male, mean weight was 1140 g and mean GA was 32.6 weeks. In the second group (subcutaneous=SC), 42% were female and 58% were male. The mean weight was 1245 g and mean GA was 31.2 weeks and this was not statistically significant. In the first group, the mean Hb and HCT were 9.7±1.9 and 29.6±5.9 g/dl. In the second group, the figures were 12.5±1.7 and 38.8±5.1 which were statistically significant. There was no difference in the weight gain between two groups. In the first group, 3 neonates (20%) and in the second one, 1 neonate (15%) needed blood transfusion. CONCLUSIONS rhEPO administration either PO or SC could prevent anemia of prematurity but SC rout was more effective.
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Affiliation(s)
- R Saeidi
- Department of Pediatrics, Mashhad University of Medical Sciences, Mashhad, Iran
| | - A Banihashem
- Department of Pediatrics, Mashhad University of Medical Sciences, Mashhad, Iran
| | - M Hammoud
- Department of Pediatrics, Mashhad University of Medical Sciences, Mashhad, Iran
| | - M Gholami
- Department of Midwifery, Islamic Azad University, Neyshabur Branch, Neyshabur, Iran,Correspondence: Mahboobeh Gholami, MS, Department of Midwifery, Islamic Azad University, Neyshabur Branch, Neyshabur, Iran. Tel.: +98-915-5245880, Fax: +98-551-6621901, E-mail:
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Gholami M, Cocquempot V, Schiøler H, Bak T. Passive Fault Tolerant Control of Piecewise Affine Systems Based on H Infinity Synthesis. ACTA ACUST UNITED AC 2011. [DOI: 10.3182/20110828-6-it-1002.02935] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Gholami M, Rad LS. Anthropometric, body composition and somatotype differences of Iranian elite female basketball and handball players. Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078725.114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Gholami M, Rad LS. Anthropometric, body composition and somatotype differences of Iranian elite female basketball and handball players. Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078972.58] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gholami M, Sabbaghian Rad L. Does lifestyle correlates with body composition and lipoprotein-lipid profiles in obese females? Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078725.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Javidnia K, Gholami M, Firuzi O, Özer H, Kandemir A. Antimicrobial and Antioxidant Activity and Chemical Composition of the Essential Oil ofTanacetum macrophyllum(Waldst. et Kit.) Schultz. Bip. Journal of Essential Oil Research 2010. [DOI: 10.1080/10412905.2010.9700299] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Gholami M, Rahemi M. Effect of Water Stress and Recovery on the Water Status and Osmotic Adjustment of Miniature Rose Meshkinjan. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/rjes.2010.288.293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Gholami M. Effects of n-3 HUFA Enriched Daphnia magna on Growth, Survival, Stress Resistance and Fatty Acid Composition of White Fish Fry (Rutilus frisii kutum). ACTA ACUST UNITED AC 2009. [DOI: 10.3923/jfas.2010.49.55] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Gholami M, Talaie MR. Investigation of Simplifying Assumptions in Mathematical Modeling of Natural Gas Dehydration Using Adsorption Process and Introduction of a New Accurate LDF Model. Ind Eng Chem Res 2009. [DOI: 10.1021/ie901183q] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Gholami
- Department of Chemical Engineering, College of Engineering, University of Isfahan, P.O. Box 81746-73441, Isfahan, Iran
| | - M. R. Talaie
- Department of Chemical Engineering, College of Engineering, University of Isfahan, P.O. Box 81746-73441, Isfahan, Iran
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Sanati KA, Yadegarfar G, Naghavi SHR, Sadr AH, Gholami M, Hadipour M, Sanati JGH. Occupational injuries in a synthetic fibre factory in Iran. Occup Med (Lond) 2009; 59:62-5. [DOI: 10.1093/occmed/kqn161] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Javidnia K, Miri R, Soltani M, Gholami M, Khosravi AR. Antimicrobial activity and chemical composition of the essential oils of six Iranian Salvia species. Chem Nat Compd 2008. [DOI: 10.1007/s10600-008-9161-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gholami M, Haratizadeh H, Esmaeili M, Amiri R, Holtz PO, Hammar M. Alternation of band gap and localization of excitons in InGaNAs nanostructures with low nitrogen content. Nanotechnology 2008; 19:315705. [PMID: 21828797 DOI: 10.1088/0957-4484/19/31/315705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Continuous wave photoluminescence (cw PL) spectroscopy has been used to study the optical properties of a set of InGaNAs epilayers and single quantum wells with nitrogen concentration less than a few per cent at different temperatures and different excitation powers. We found that nitrogen has a critical role on the emission light of InGaNAs nanostructures and the recombination mechanism. The incorporation of a few per cent of nitrogen leads to shrinkage of the InGaNAs band gap. The physical origin of such band gap reduction has been investigated both experimentally and theoretically by using a band anticrossing model. We have found that localization of excitons that have been caused by incorporation of a few per cent of nitrogen in these structures is the main explanation of such anomalous behavior observed in the low-temperature photoluminescence spectra of these nanostructures. The localization energies of carriers have been evaluated by studying the variation of the quantum well (QW) emission versus temperature, and it was found that the localization energy increases with increasing nitrogen composition. Our data also show that, with increasing excitation intensity, the PL peak position moves to higher energies (blue shift) due to the filling of localized states and capture centers for excitons by photo-generated carriers.
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Affiliation(s)
- M Gholami
- Physics Department, Shahrood University of Technology, 3619995161, PO Box 316, Shahrood, Iran. Department of Science, Islamic Azad University, Damghan Branch, Damghan, Iran
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Abstract
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 (DBP(s)) during the chlorination process. Formation of DBP(s) 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 DBP(s) reduction.
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Affiliation(s)
- M A Zazouli
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Gholami M, Coombe B, Robinson S. GRAPEVINE PHLOEM SAP ANALYSIS: 1-SUCROSE ACIDS, POTASSIUM CONCENTRATIONS, SEASONAL AND DIURNAL PATTERNS. ACTA ACUST UNITED AC 2004. [DOI: 10.17660/actahortic.2004.640.16] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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