Consulta: subjectFacets:"Scanning electron microscope"
Registros recuperados: 6
Data/hora: 06/06/2024 18:00:43

Ultrastructure study of Vanda Kasem's Delight orchid's protocorm-like body
Provedor de dados: 75
Autores: Gnasekaran,Pavallekoodi; Mahmood,Maziah; Subramaniam,Sreeramanan.
ABSTRACT Growing orchids has been classified as an international business since it covers 8% of the world floriculture trade. Thus, large-scale micropropagation of orchid using tissue culture techniques and improvement of some essential traits, such as resistances to various diseases and pests, and tolerances to environmental stresses, such as low temperatures and low light intensities, via genetic engineering acknowledged the orchids as one of the top ten cut flowers. Protocorm-like bodies (PLBs) are excellent explants for clonal propagation, artificial seeds development and genetic engineering since they are organized and easily regenerable somatic embryos that propagate rapidly. Vanda Kasem's Delight hybrid orchid's PLBs derived from shoot tip culture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vanda Kasem's Delight; Morphology; Scanning electron microscope; Transmission electron microscope.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000300333

Calcein staining of calcified structures in pearl oyster Pinctada margaritifera and the effect of food resource level on shell growth
Provedor de dados: 5
Autores: Linard, Clementine; Gueguen, Yannick; Moriceau, Jacques; Soyez, Claude; Hui, Belinda; Raoux, Aurore; Cuif, Jean Pierre; Cochard, Jean-claude; Le Pennec, Marcel; Le Moullac, Gilles.
Marine mollusc shell growth has been widely measured using fluorochrome marking. In order to test the efficiency and reliability of calcein staining on P. margaritifera shells and pearls, the present study examined two administration methods, different concentrations and several immersion times.Immersion in a 150 mg.L-1 calcein solution for 12 h to 24 h appeared to be the best method for marking P. margaritifera shells. For pearl marking, injection of a 200 mg.L-1 calcein solution into the pearl pouch was the optimal method. Calcein marking was then used to measure the influence of food resource levels on the shell growth. Groups of 23-month-old P. margaritifera were fed at three trophic levels for two months. The two highest food levels tested (6 000...
Tipo: Text
Palavras-chave: Bivalvia; Pearl; Shell; Growth; Scanning electron microscope.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00028/13907/11195.pdf

Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers
Provedor de dados: 77
Autores: Souza,Mónica Rodrigues de; Watanabe,Ii-Sei; Azevedo,Luciane H; Tanji,Edgar Y.
In this work, we studied the effects of C0(2), Nd:YAG and diode lasers on the enamel and dentin of deciduous human teeth. After the irradiations, the samples were duly prepared and set up on metallic bases, covered with gold and examined in the scanning electron microscope. The results showed that the irradiation with the C0(2) mode locked laser with 1.0 W power caused melting and irregularities with small cavities on the surface of the enamel. The irradiated area on the dentin surface appeared circular and well delimited, containing blocks of dentin and cracks. By using the pulsed Nd:YAG laser with 1.0 W mean power and 10 Hz frequency, the enamel surface presented granules of molten enamel, with a typical melting look. The irradiated dentin surface...
Tipo: Journal article
Palavras-chave: Deciduous tooth; Enamel; Dentin; C0(2) laser; Nd:YAG laser; Diode laser; Scanning electron microscope.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200021

Remarks Using the SEM method Species Seeds of Gentiana occurring in Turkey
Provedor de dados: 87
Autores: ALÇITEPE,E.; ERKEN,S.; GÜLBAG,F.; ÖZZAMBAK,M.E.
ABSTRACT Seeds of eleven perennial Gentiana collected from Turkey were analyzed using the SEM method. Other species excluding G. septemfida, G. boissieri, G. gelida were studied for the first time. They were identified and compared in terms of seed characteristics and surface ornamentations. Major characteristics including the outer periclinal walls of testa, sculpting of inner periclinal walls, seed shape, seed and testa cell, wing cell size, thickness of testa wall and seed shape have been proposed for Turkey Gentiana. They are divided into different types, such as no wing, chalazal wing, incomplete discoid wing, complete discoid wing according to the outer periclinal walls of testa. Considering primary sculpting of seeds, irregularly striate and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gentiana; Seed-coat; Scanning electron microscope; Turkey.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100204

The foliar trichomes of Hypoestes aristata (Vahl) Sol. ex Roem. &amp;amp; Schult var aristata (Acanthaceae) a widespread medicinal plant species in tropical sub-Saharan Africa: with comments on its possible phylogenetic significance
Provedor de dados: 48
Autores: Bhatt,A; Naidoo,Y; Nicholas,A.
The micromorphology of foliar trichomes of Hypoestes aristata var. aristata was studied using stereo, light and scanning microscopy (SEM). This genus belongs to the advanced angiosperm family Acanthaceae, for which few micromorphological leaf studies exist. Results revealed both glandular and non-glandular trichomes, the latter being more abundant on leaf veins, particularly on the abaxial surface of very young leaves. With leaf maturity, the density of non-glandular trichomes decreased. Glandular trichomes were rare and of two types: long-stalked capitate and globose-like peltate trichomes. Capitate trichomes were observed only on the abaxial leaf surface, while peltate trichomes were distributed on both adaxial and abaxial leaf surfaces.
Tipo: Journal article
Palavras-chave: Acanthaceae; Glandular trichomes; Hypoestes aristata var. aristata; Medicinal plant; Scanning electron microscope.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000400004

Bioprocessing of some agro-industrial residues for endoglucanase production by the new subsp.; Streptomyces albogriseolus subsp. cellulolyticus strain NEAE-J
Provedor de dados: 58
Autores: El-Naggar,Noura El-Ahmady; Abdelwahed,Nayera A.M.; Saber,Wesam I.A.; Mohamed,Asem A.
The use of low cost agro-industrial residues for the production of industrial enzymes is one of the ways to reduce significantly production costs. Cellulase producing actinomycetes were isolated from soil and decayed agricultural wastes. Among them, a potential culture, strain NEAE-J, was selected and identified on the basis of morphological, cultural, physiological and chemotaxonomic properties, together with 16S rDNA sequence. It is proposed that strain NEAE-J should be included in the species Streptomyces albogriseolus as a representative of a novel sub-species, Streptomyces albogriseolus subsp. cellulolyticus strain NEAE-J and sequencing product was deposited in the GenBank database under accession number JN229412. This organism was tested for its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agro-industrial residues; Endoglucanase production; Streptomyces albogriseolus; 16S rRNA; Scanning electron microscope.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200050