scholarly journals Retraction: “Laser wavelength and dose effects on Al nanoparticles structural formation in deionized water” [J. Laser Appl. 28, 042007 (2016)]

2020 ◽  
Vol 32 (2) ◽  
pp. 029902
Author(s):  
H. R. Dehghanpour
Keyword(s):  
Laser Wavelength ◽  
Deionized Water ◽  
Structural Formation ◽  
Al Nanoparticles ◽  
Dose Effects

Effect of Laser Wavelength at IR (1064 nm) and UV (193 nm) on the Structural Formation of Palladium Nanoparticles in Deionized Water

2011 ◽  
Vol 115 (12) ◽  
pp. 5049-5057 ◽  
Author(s):  
Seyedeh Zahra Mortazavi ◽  
Parviz Parvin ◽  
Ali Reyhani ◽  
Ahmad Nozad Golikand ◽  
Soghra Mirershadi
Keyword(s):  
Palladium Nanoparticles ◽  
Laser Wavelength ◽  
Deionized Water ◽  
Structural Formation ◽  
193 Nm

EFFECT OF LASER WAVELENGTH AND ABLATION TIME ON PULSED LASER ABLATION SYNTHESIS OF AL NANOPARTICLES IN ETHANOL

2012 ◽  
Vol 05 ◽  
pp. 58-65 ◽  
Author(s):  
A. BALADI ◽  
R. SARRAF MAMOORY
Keyword(s):  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Ablation Rate ◽  
Laser Wavelength ◽  
Aluminum Nanoparticles ◽  
Ablation Efficiency ◽  
Ablation Time ◽  
Al Nanoparticles ◽  
Ablated Mass

Aluminum nanoparticles were synthesized by pulsed laser ablation of Al targets in ethanol for 5-15 minutes using the 1064 and 533 nm wavelengths of a Nd:YAG laser with energies of 280-320 mJ per pulse. It has been found that higher wavelength leads to significantly higher ablation efficiency, and finer spherical nanoparticles are also synthesized. Besides, it was obvious that higher ablation time resulted in higher ablated mass, while lower ablation rate was observed. Finer nanoparticles, moreover, are synthesized in higher ablation times.

scholarly journals Generation of Al Nanoparticles via Laser Ablation in Deionized Water with Structural and Morphological Study

2016 ◽  
Vol 8 (4(1)) ◽  
pp. 04017-1-04017-2 ◽  
Author(s):  
H. R. Dehghanpour ◽  
◽  
H. Hashemi ◽  
H. Asefi ◽  
◽  
...  
Keyword(s):  
Laser Ablation ◽  
Morphological Study ◽  
Deionized Water ◽  
Al Nanoparticles

Oncornavirus assembly at the cell surface revealed in replicas of freeze-dried cells

1978 ◽  
Vol 36 (2) ◽  
pp. 354-355
Author(s):  
Anthony Demsey ◽  
Christopher W. Stackpole
Keyword(s):  
Cell Surface ◽  
Surface Membrane ◽  
Viral Origin ◽  
Intact Cells ◽  
Structural Formation ◽  
Virus Core ◽  
Freeze Dried ◽  
Cacodylate Buffer ◽  
Surface Replica ◽  
Leukemia Viruses

The murine leukemia viruses are type-C oncornaviruses, and their release from the host cell involves a “budding” process in which the newly-forming, RNA-containing virus core becomes enveloped by modified cell surface membrane. Previous studies revealed that the released virions possess a dense array of 10 nm globular projections (“knobs”) on this envelope surface, and that these knobs contain a 70, 000 MW glycoprotein (gp70) of viral origin. Taking advantage of this distinctive structural formation, we have developed a procedure for freeze-drying and replication of intact cells which reveals surface detail superior to other surface replica techniques, and sufficient to detect even early stages of virus budding by localized aggregation of these knobs on the cell surface.Briefly, cells growing in monolayer are seeded onto round glass coverslips 10-12 mm in diameter. After a period of growth, cells are fixed in situ for one hour, usually with 1% OsO4 in 0. 1 M cacodylate buffer, and rinsed in distilled water.

Resolution of Channels in the Exine by Translocation of Colloidal Iron

1971 ◽  
Vol 29 ◽  
pp. 352-353
Author(s):  
John R. Rowley
Keyword(s):  
Phosphate Buffer ◽  
Pollen Development ◽  
Osmium Tetroxide ◽  
Pollen Grains ◽  
Deionized Water ◽  
Colloidal Iron ◽  
Fixed Material ◽  
Epilobium Angustifolium ◽  
Untreated Material ◽  
Microspore Mitosis

The morphology of the exine of many pollen grains, at the time of flowering, is such that one can suppose that transport of substances through the exine occurred during pollen development. Holes or channels, microscopic to submicroscopic, are described for a large number of grains. An inner part of the exine of Epilobium angustifolium L. and E. montanum L., which may be referred to as the endexine, has irregularly shaped channels early in pollen development although by microspore mitosis there is no indication of such channeling in chemically fixed material. The nucleus in microspores used in the experiment reported here was in prophase of microspore mitosis and the endexine, while lamellated in untreated grains, did not contain irregularly shaped channels. Untreated material from the same part of the inflorescence as iron treated stamens was examined following fixation with 0.1M glutaraldehyde in cacodylate-HCl buffer at pH 6.9 (315 milliosmoles) for 24 hrs, 4% formaldehyde in phosphate buffer at pH 7.2 (1,300 milliosmoles) for 12 hrs, 1% glutaraldehyde mixed with 0.1% osmium tetroxide for 20 min, osmium tetroxide in deionized water for 2 hrs and 1% glutaraldehyde mixed with 4% formaldehyde in 0.1M cacodylate-HCl buffer at pH 6.9 for two hrs.

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