36 documents found, page 1 of 4
Purification, biochemical characterization and antifungal activity of a new lip...
Zottich, Umberto; Cunha, Maura da; Carvalho, André O.; Dias, Germana Bueno; Silva, Nádia C.M.; Santos, Izabela S.; Nacimento, Viviane V. doBackground: A growing number of cysteine-rich antimicrobial peptides (AMPs) have been isolated from plants and particularly from seeds. It has become increasingly clear that these peptides, which include lipid transfer proteins (LTPs), play an important role in the protection of plants against microbial infection. Methods: Peptides from Coffea canephora seeds were extracted in Tris–HCl buffer (pH 8.0), and chro...
Micromorfologia da superfície aérea de Psychotria nuda (Cham. & Schlecht.) Wawr...
Klein, Denise Espellet; Moraes, T. M. S.; Miguel, Emilio de Castro; Silva, A. de S. da; Alexandrino, Cristiane Duarte; Moraes, Daniel Gomes deHá cerca de 400 milhões de anos, a parede periclinal externa das primeiras plantas terrestre já era coberta por cutícula [1]. Em primeira análise, a superfície aérea das plantas, por ser uma região de fronteira com o ambiente, funciona como uma proteção contra adversidades bióticas e abióticas. A superfície dos órgãos aéreos de P. nuda, apresentase glabra, ou seja, sem tricomas, com exceção da base da corola e ...
Ultrastructure of secretory and senescence phase in colleters of Bathysa gymnoc...
Miguel, Emilio de Castro; Klein, Denise Espellet; Oliveira, Marco Antonio de; Cunha, Maura daColleters are secretory structures formed by a parenchymatic axis with vascular bundles, bound by a layer of secretory palisade-like epidermis. Some studies regarding the structure of colleters have focused on secretory cells structure, but not distinguished the secretory and senescent phases. Generally, in mucilage-secreting cells such as colleters, the endoplasmic reticulum and Golgi apparatus are involved in...
Stipular colleters in Psychotria nuda (Cham. & Schltdl.) Wawra (Rubiaceae): mic...
Miguel, Emilio de Castro; Moraes, Daniel Gomes de; Cunha, Maura daColleters are secretory structures, with a protective function, that occur in different organs and in many Angiospermae families. The aim of this work was to describe the anatomy and micromorphology of colleters present in Psychotria nuda (Cham. & Schltdl.) Wawra as well as analyze the structure and composition of crystals from the central axis of the structure under study. The material was collected at the Tin...
Ultrastructural, physiological and biochemical analyses of chlorate toxicity on...
Borges, Regis; Miguel, Emilio de Castro; Dias, Janice Maria Ribeiro; Cunha, Maura da; Bressan-Smith, Ricardo Enrique; Oliveira, Jurandi Gonçalves deChlorates are oxidizing substances considered phytotoxic to all green plant parts. In this study the physiological, biochemical and ultrastructural effects of chlorate treatments were studied in rice seedlings grown at two different temperatures (28 and 6 ◦C). Visual analyses demonstrated that the chlorate treatment provoked severe damage to plant leaves only at 28 ◦C. The electron microscopy of the chloroplast...
Protective effect of natural and processed coconut water by non-thermal technol...
Miguel, Thaiz Batista Azevedo Rangel; Porto, Elaine Cristina Maciel; Pinheiro, Sergimar Kennedy de Paiva; Miguel, Emilio de CastroCoconut water is widely consumed and appreciated due its sensory, nutritional, and functional characteristics. Despite being widely consumed, this beverage has a short shelf life that can be improved through processing technologies including nonthermal technologies. Although this processing is promising, it also can generate toxic bioactive compounds of natural and synthetic origin. Their safety has been long d...
Morphological and ultrastructural changes in seminal coagulum of the squirrel m...
Sousa, Patrícia da Cunha; Leão, Danuza Leite; Sampaio, Wlaisa Vasconcelos; Vasconcelos, Fábio Roger; Pinheiro, Sergimar Kennedy de PaivaStudies with squirrel monkey semen are of special interest due to the large amount of coagulation that is a component of the semen, which is a problem that has to be overcome when the objective is harvesting of gametes. In the present study, there was characterization of the seminal coagulum of captive S. collinsi. Four samples of ejaculates were collected using electroejaculation procedures from four animals. ...
Hydrochar from sugarcane industry by-products: assessment of its potential use ...
Fregolente, Laís Gomes; Santos, João Vitor dos; Mazzati, Felipe S.; Miguel, Thaiz Batista Azevedo Rangel; Miguel, Emilio de CastroBackground: Hydrothermal carbonization (HTC) is a thermochemical process to convert biomass in carbon-rich materials (hydrochar). The use of sugarcane industry by-products in HTC has been evaluated, generating a hydrochar rich in nutrients, which could be used as a soil conditioner. We raised the hypothesis that the application of hydrochar in soil can improve its nutrient characteristics, bringing a better env...
Osseointegration improvement of Co-Cr-Mo alloy produced by additive manufacturing
Iatecola, Amilton; Longhitano, Guilherme Arthur; Antunes, Luiz Henrique Martinez; Jardini, André Luiz; Miguel, Emilio de Castro; Béreš, MiloslavCobalt-base alloys (Co-Cr-Mo) are widely employed in dentistry and orthopedic implants due to their biocompatibility, high mechanical strength and wear resistance. The osseointegration of implants can be improved by surface modification techniques. However, complex geometries obtained by additive manufacturing (AM) limits the efficiency of mechanical-based surface modification techniques. Therefore, plasma imme...
Corn starch based films treated by dielectric barrier discharge plasma
Goiana, Mayara Lima; Brito, Edy Sousa de; Alves Filho, Elenilson Godoy; Miguel, Emilio de Castro; Fernandes, Fabiano André NarcisoCold plasma is an innovative strategy to strengthen the polysaccharide-based films characteristics. This study evaluated the effects of dielectric barrier discharge (DBD) plasma on the hydrophilic character, water vapor permeability (WVP), and tensile properties of corn starch-based films. Starch films were exposed to plasma processing operating at an excitation frequency of 200 Hz for 10, 15, and 20 min. DBD p...