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Koushki A, Sarikhani S. High-order harmonic generation from CH4 and CD4 molecules in the presence of a static electric field. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2020.111020] [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: 11/25/2022]
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Ebrahimzadeh S, Barzi M, Lotfollahi M, Tabatabaei SN, Sarikhani S. Attosecond pulse generation from $H_2^ + $H2+ ions using a multicolor beam superposition method. Opt Lett 2020; 45:923-926. [PMID: 32058507 DOI: 10.1364/ol.378494] [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] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
The behavior of the high-order harmonics and output attosecond pulses from hydrogen molecule ions with various internuclear distances that are exposed to high intensity incoming pulses are investigated. The incoming pulses that are spectrally wide yield from a superposition of monochromatic beams with a constant frequency distance. Our simulations show that the most intense and shortest attosecond pulses can result from hydrogen molecular ions with large internuclear distances which are exposed to irradiation of intense pulses with a frequency width greater than 0.03 a.u.
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Lafouti M, Latifi H, Fathi H, Ebrahimzadeh S, Sarikhani S, Sarabi H. Experimental investigation of a high-power 1018 nm fiber laser using a 20/400 μm ytterbium-doped fiber. Appl Opt 2019; 58:729-733. [PMID: 30874113 DOI: 10.1364/ao.58.000729] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 12/12/2018] [Indexed: 06/09/2023]
Abstract
A 472 W monolithic fiber laser, operating at 1018 nm by employing an active fiber with a low core/cladding diameter ratio of 20/400 μm, is reported in this paper. The slope efficiency and beam quality factor (M2) of the fiber laser are, respectively, 49.4% and 1.17. To realize the setup, the effects of the characteristics of the experimental elements-reflectivity of the output coupling fiber Bragg grating, length of the active fiber, etc.-on the output behavior of the system have been investigated. These are the highest recorded output signal power, efficiency, and beam quality factor in monolithic 1018 nm ytterbium-doped fiber lasers using fibers with a core/cladding diameter ratio of 20/400 μm.
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Hariri A, Sarikhani S. Study of spectral linewidth in Ne-like Se x-ray laser. Appl Opt 2015; 54:9681-9687. [PMID: 26836523 DOI: 10.1364/ao.54.009681] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Based on the modeling of the geometrically dependent gain coefficient (GDGC) and rate equations, this theoretical study explains the spectral linewidth behavior in an Se x-ray laser operating at 206.4 Å. The study used the reported experimental measurements for an Se target of 6.3 cm in length for the analysis. To obtain a finite value for the amplified spontaneous emission (ASE) intrinsic linewidth that initiates at the threshold length, we subtracted the ASE intensity background from the calculated ASE intensity to derive the corresponding FWHM. For homogeneously and Doppler broadened linewidths of 14 mÅ and 36 mÅ, we calculated the ASE Voigt profile linewidth to be 44 mÅ, initiated at the threshold length of 0.13 cm. The interaction is rather insensitive to the collision broadening; for the homogeneously broadened linewidth up to 21 mÅ, we could still explain the linewidth measurements. In this case, we calculated the related Voigt profile linewidth to be 48.5 mÅ. The current GDGC modeling approach greatly simplified the ASE analyses of these lasers.
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Hariri A, Sarikhani S. Theoretical application of z-dependent gain coefficient to describe amplified spontaneous emission. Opt Lett 2012; 37:1127-1129. [PMID: 22446247 DOI: 10.1364/ol.37.001127] [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
Based on the geometrical modeling of the unified gain coefficient and the reported amplified spontaneous emission (ASE) output energy measurement ε(ASE) versus amplifying excitation length, l(AMP) in a KrF laser oscillator, we managed, as an example, to explain the ASE output energy behavior both numerically and analytically. In this approach, introducing the ASE gain-coefficient profile for the KrF laser, g(0,KrF)(ASE), was not avoidable. It was found that while the g(0,KrF)(ASE) profile follows the introduced gain-modeling formulation, it is, however, slightly lower than the KrF laser gain profile, g(0,KrF)(exp), deduced from the measurements reported by different researchers. The present approach, up to the present time, is able to explain all of the existing ambiguities on understanding the ASE behavior.
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Affiliation(s)
- A Hariri
- Laser and Optics Research Department, Nuclear Science and Technology Research Institute, Tehran, Iran.
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Charbgoo F, Mirshahi M, Sarikhani S, Saifi Abolhassan M. Synthesis of a unique high-performance poly-horseradish peroxidase complex to enhance sensitivity of immunodetection systems. Biotechnol Appl Biochem 2012; 59:45-9. [DOI: 10.1002/bab.58] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 09/09/2011] [Indexed: 11/11/2022]
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Nazari M, Mirshahi M, Mowla SJ, Bamdad T, Sarikhani S. Investigation in vitro Expression of CatSper Sub Fragment followed by Production of Polyclonal Antibody: Potential Candidate for The Next Generation of Non Hormonal Contraceptive. Cell J 2012; 14:215-24. [PMID: 23508510 PMCID: PMC3584432] [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] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Accepted: 04/23/2012] [Indexed: 11/25/2022]
Abstract
OBJECTIVE CatSper is a voltage-sensitive calcium channel that is specifically expressed in the testis and it has a significant role in sperm performance. CatSper (1-4) ion channel subunit genes, causes sperm cell hyperactivation and male fertility. In this study, we have explored targeting of the extracellular loop as an approach for the generation of antibodies with the potential ability to block the ion channel and applicable method to the next generation of non-hormonal contraceptive. MATERIALS AND METHODS In this experimental study, a small extracellular fragment of CatSper1 channel was cloned in pET-32a and pEGFP-N1 plasmids. Then, subsequent methods were performed to evaluate production of antibody: 1) pEGFP-N1/CatSper was used as a DNA vaccine to immunize Balb/c mice, 2) The purified protein of pET-32a/CatSper was used as an antigen in an enzyme-linked immunosorbent assay (ELISA) and western- blot, and 3) The serum of Balb/-c mice was used as an antibody in ELISA and western-blot. The statistical analysis was performed using the Mann Whitney test. RESULTS The results showed that vaccination of the experimental group with DNA vaccine caused to produce antibody with (p<0.05) unlike the control group. This antibody extracted from Balb/c serum could recognize the antigen, and it may be used potentially as a male contraception to prevent sperm motility. CONCLUSION CatSpers are the promising targets to develop male contraceptive because they are designed highly specific for sperm; although, no antagonists of these channels have been reported in the literature to date. As results showed, this antibody can be used in male for blocking CatSper channel and it has the potential ability to use as a contraceptive.
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Affiliation(s)
- Mahboobeh Nazari
- 1. Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran,2. Department of Recombinant Technology Research, Nanobiotechnology Research Center, Avicenna Research Institute, Academic center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Manouchehr Mirshahi
- 1. Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran, * Corresponding Address:
P.O.Box: 14115-175Department of BiochemistryFaculty of Biological SciencesTarbiat Modares UniversityTehranIran
| | - Seyed-Javad Mowla
- 3. Department of Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Taravat Bamdad
- 4. Department of Virology, Faculty of Medical Science, Tarbiat Modares University, Tehran, Iran
| | - Sina Sarikhani
- 1. Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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Gholivand K, Dorosti N, Ghaziany F, Mirshahi M, Sarikhani S. N-phosphinyl ureas: Synthesis, characterization, X-ray structure, and in vitro evaluation of antitumor activity. Heteroatom Chem 2011. [DOI: 10.1002/hc.20754] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Avijgan M, Hafizi M, Moghni M, Kheiri S, Esteghamati A, Sarikhani S. Immunogenicity and efficacy of Hoshino strain of mumps vaccine in Iran; two years study. East Afr J Public Health 2011; 8:88-91. [PMID: 22066292] [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] [Indexed: 05/31/2023]
Abstract
This report describes the immunogenicity and efficacy and long term immunity of Hoshino strain of Mumps (included in MMR Vaccine) in shahr-e-kord, Islamic Republic of Iran (I.R.Iran). A total of 338 Children aged 3-18 years were tested for Mumps IgG using enzyme-linked immunosorbent assay (ELISA). The proportion of susceptible, mumps IgG negative, children was 19.8% (67 subjects). Of the 67 susceptible children, 36 received the MMR vaccination and successfully completed the study. Blood was collected by venipuncture 3, 12, and 24 months after vaccination and serum samples were tested by ELISA for detection of Mumps IgM and IgG. The overall seroconversion rate was 86.1%, 77.7% and 75% at 3, 12, and 24 months after vaccination respectively.
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Affiliation(s)
- M Avijgan
- Dept. of Infectious and Tropical Diseases and Iranian Traditional Medicine Research Centre, Isfahan University of Medical Sciences, Isfahan, Islamic Republic of Iran.
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Cohan N, Sarikhani S, Moslemi S, Karimi M. Initial presentation of acute lymphoblastic leukemia with osteoporosis and multiple spontaneous bone fractures. Iran Red Crescent Med J 2011; 13:52-4. [PMID: 22946019 PMCID: PMC3407586] [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] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2010] [Accepted: 08/28/2010] [Indexed: 11/12/2022]
Abstract
Acute lymphoblastic leukemia (ALL) is the most common childhood malignancy. Skeletal abnormalities have been described in association with ALL including osteoprosis and bone fractures. Different factors including the disease itself or soluble products of malignant cells and treatment agents like cytotoxic drugs, methotroxate, corticosteroids and radiotherapy may be responsible for defective bone homeostasis in these patients. Orthopedic conditions and pain may be the first manifestation of acute leukemia and it is important for physicians to recognize the skeletal manifestation of acute childhood leukemia because of a delay in diagnosis has adverse effect on survival. We present a child with ALL that refer with multi bone fractures as a first manifestation of the disease.
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Affiliation(s)
- N Cohan
- Hematology Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S Sarikhani
- College of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S Moslemi
- College of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Karimi
- Hematology Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran,Correspondence: Mehran Karimi, MD, Professor of Pediatric Hematology-Oncology, Hematology Research Center, Nemazee Hospital,Shiraz University of Medical Sciences, Shiraz, Iran. Tel.: +98-711-6470207, Fax: +98-711-6470207, E-mail:
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Gholivand K, Dorosti N, Shariatinia Z, Ghaziany F, Sarikhani S, Mirshahi M. Cyclophosphamide analogues: synthesis, spectroscopic study, and antitumor activity of diazaphosphorinanes. Med Chem Res 2010. [DOI: 10.1007/s00044-010-9466-3] [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: 10/18/2022]
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Sarikhani S, Mirshahi M, Gharaati MR, Mirshahi T. Generation of a novel high-affinity monoclonal antibody with conformational recognition epitope on human IgM. Appl Biochem Biotechnol 2010; 162:1249-57. [PMID: 20162378 DOI: 10.1007/s12010-009-8873-8] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2009] [Accepted: 11/16/2009] [Indexed: 11/27/2022]
Abstract
As IgM is the first isotype of antibody which appears in blood after initial exposure to a foreign antigen in the pattern of primary response, detection, and quantification of this molecule in blood seems invaluable. To approach these goals, generation, and characterization of a highly specific mAb (monoclonal antibody) against human IgM were investigated. Human IgM immunoglobulins were used to immunize Balb/c mice. Spleen cells taken from the immunized animals were fused with SP2/O myeloma cells using PEG (polyethylene glycol, MW 1450) as fusogen. The hybridomas were cultured in HAT containing medium and supernatants from the growing hybrids were screened by enzyme-linked immunosorbent assay (ELISA) using plates coated with pure human IgM and the positive wells were then cloned at limiting dilutions. The best clone designated as MAN-1, was injected intraperitoneally to some Pristane-injected mice. Anti-IgM mAb was purified from the animals' ascitic fluid by protein-G sepharose followed by DEAE-cellulose ion exchange chromatography. MAN-1 interacted with human IgM with a very high specificity and affinity. The purity of the sample was tested by SDS-PAGE and the affinity constant was measured (K(a) = 3.5 x 10(9)M(-1). Immunoblotting and competitive ELISA were done and the results showed that the harvested antibody recognizes a conformational epitope on the mu chain of human IgM and there was no cross-reactivity with other subclasses of immunoglobulins. Furthermore, isotyping test was done and the results showed the subclass of the obtained mAb which was IgG(1)kappa.
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