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| Registros recuperados: 15 | |
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| Santos,Adriana A.; Agustini,José A.; Maltoni,Katia L.; Cassiolato,Ana M. R.. |
| ABSTRACT The aim of this study was to evaluate, through mycorrhization (root colonization and number of spores of arbuscular mycorrhizal fungi - AMF), leaf acid phosphatase and soil chemical characteristics, the effects of the addition of residues (macrophytes and ash), hydrogel and the reintroduction of microorganisms in a degraded area cultivated with jatropha. Degradation occurred when the surface soil was removed during the construction of a hydroelectric power plant. The experiment was set in a randomized block design, using a 2 x 2 x 4 factorial scheme, i.e., two inoculation treatments (with and without soil-inoculum), two hydrogel treatments (with and without) and four with the addition of residues (macrophytes - MAC, ash, MAC + ash and control,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas L.; Arbuscular mycorrhiza; Hydrogel; Macrophytes; Cerrado.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400372 |
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| Rederstorff, Emilie; Weiss, Pierre; Sourice, S.; Pilet, P.; Xie, F.; Sinquin, Corinne; Colliec-jouault, Sylvia; Guicheux, Jerome; Laib, S.. |
| Natural polysaccharides are attractive compounds with which to build scaffolds for bone and cartilage tissue engineering. Here we tested two non-standard ones, HE800 and GY785, for the two-dimensional (2-D) and three-dimensional (3-D) culture of osteoblasts (MC3T3-E1) and chondrocytes (C28/I2). These two glycosaminoglycan-like marine exopolysaccharides were incorporated into an injectable silylated hydroxypropylmethylcellulose-based hydrogel (Si-HPMC) that has already shown its suitability for bone and cartilage tissue engineering. Results showed that, similarly to hyaluronic acid (HA) (the control), HE800 and GY785 significantly improved the mechanical properties of the Si-HPMC hydrogel and induced the attachment of MC3T3-E1 and C28/I2 cells when these... |
| Tipo: Text |
Palavras-chave: Glycosaminoglycan; Hydrogel; Polysaccharide; Bone and cartilage tissue engineering; In vitro test. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00030/14090/15747.pdf |
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| SIMONI,RAYSSA C.; LEMES,GISLAINE F.; FIALHO,SANDRA; GONÇALVES,ODINEI H.; GOZZO,ANGELA M.; CHIARADIA,VIVIANE; SAYER,CLAUDIA; SHIRAI,MARIANNE A.; LEIMANN,FERNANDA V.. |
| ABSTRACT Enzymatically crossliked gelatin hydrogel was submitted to two different drying methods: air drying and freeze drying. The resulting polymeric tridimensional arrangement (compact or porous, respectively) led to different thermal and swelling properties. Significant differences (p < 0.05) on thermal and mechanical characteristics as well as swelling in non-enzymatic gastric and intestinal simulated fluids (37 ºC) were detected. Water absorption data in such media was modelled according to Higuchi, Korsmeyer-Peppas, and Peppas-Sahlin equations. Freeze dried hydrogel showed Fickian diffusion behavior while air dried hydrogels presented poor adjustment to Higuchi model suggesting the importance of the relaxation mechanism at the beginning of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air drying; Freeze drying; Hydrogel; Transglutaminase. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200745 |
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| Regiane Cristina Marcato,Sita; Reissmann,Carlos Bruno; Marques,Renato; Oliveira,Edilson de; Taffarel,Angela Daniela. |
| This study was conducted to evaluate the effect of polymer used with different nitrogen and potassium sources on the growth and nutrition of chrysanthemum (Dendranthema grandiforum, var. "Virginal") and on chemical characteristics of substrate. Two substrates were evaluated: 1) composite with 50 % organic soil, 45 % sand, and 5 % composted tobacco; 2) plow layer soil (0-20 cm depth; red oxisol typical dystrophic). The experimental design was a factorial (4x2x2) and included four polymer rates (0, 1, 2, and 4 g kg-1of substrate), two nitrogen ((NH4)2SO4 and (H2N)2CO), and two potassium (KCl and K2SO4) sources. Dry biomass, flower number, and concentration of K, Ca, and Mg were evaluated. Inverse relationships between polymer rates and plant biomass,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrogel; Polyacrylamide; Chrysanthemum; Fertilizer; Macronutrients. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300002 |
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| Melo,M.A.B.; Caetano,W.; Oliveira,E.L.; Barbosa,P.M.; Rando,A.L.B.; Pedrosa,M.M.D.; Godoi,V.A.F.. |
| Photodynamic therapy, by reducing pain and inflammation and promoting the proliferation of healthy cells, can be used to treat recurrent lesions, such as diabetic foot ulcers. Studies using the photosensitizer phthalocyanine, together with the nanostructured copolymeric matrix of Pluronic® and Carbopol® for the treatment of diabetic foot ulcers and leishmaniosis lesions, are showing promising outcomes. Despite their topical or subcutaneous administration, these molecules are absorbed and their systemic effects are unknown. Therefore, we investigated the effect of the subcutaneous administration of the hydroxy-aluminum phthalocyanine hydrogel without illumination on systemic parameters, markers of liver injury, and liver energy metabolism in type 1 diabetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydroxy-aluminum phthalocyanine; Hydrogel; Liver; Type 1 diabetes; Mice. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000100609 |
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| Rederstorff, E.; Rethore, G.; Weiss, P.; Sourice, S.; Beck-cormier, S.; Mathieu, E.; Maillasson, M.; Jacques, Y.; Colliec-jouault, Sylvia; Fellah, B. H.; Guicheux, J.; Vinatier, C.. |
| The development of biologically and mechanically competent hydrogels is a prerequisite in cartilage engineering. We recently demonstrated that a marine exopolysaccharide, GY785, stimulates the in vitro chondrogenesis of adipose stromal cells. In the present study, we thus hypothesized that enriching our silated hydroxypropyl methylcellulose hydrogel (Si-HPMC) with GY785 might offer new prospects in the development of scaffolds for cartilage regeneration. The interaction properties of GY785 with growth factors was tested by surface plasmon resonance (SPR). The biocompatibility of Si-HPMC/GY785 towards rabbit articular chondrocytes (RACs) and its ability to maintain and recover a chondrocytic phenotype were then evaluated in vitro by MTS assay, cell counting... |
| Tipo: Text |
Palavras-chave: Cartilage; Hydrogel; Glycosaminoglycan; Marine polysaccharides; Chondrocytes; Tissue engineering. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00303/41449/40650.pdf |
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| Silva,Welcio R. da; Salomão,Leandro C.; Pereira,Débora R. M.; Oliveira,Henrique F. E. de; Pereira,Alexandre I. de A.; Cantuario,Fernando S.. |
| ABSTRACT One of the potential alternatives to improve the use of water resources is the use of hydro retainer polymer applied to the soil. The objective of this study was to evaluate how irrigation levels and doses of hydro retainer polymer interfere in the production of ’Vanda’ lettuce. The experiment was carried out from December 2017 to January 2018 under protected environment in the Instituto Federal Goiano, Urutaí Campus, Goiás State, GO, Brazil (17º 29’ 10” S of latitude, 48º 12’ 38” W of longitude and 697 m of altitude). The work tested four irrigation levels of 50, 75, 100 and 125% of the evaporation obtained daily by the hook micrometer and five doses of hydrogel polymer (0, 50, 100, 150 and 200 g plant-1). The experimental design was a randomized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrogel; Lactuca sativa L.; Water resources. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600406 |
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| Kiburi, Florence Gatwiri; Kanali, |Christopher; Mbuge, Duncan Onyango. |
| The objective of this study was to establish the feasibility of applying the Page, Two term exponential, Newton, Logarithmic and Henderson and Pabis mathematical drying models for predicting the drying kinetics of seed maize using super absorbent hydrogel under hermetic conditions. To achieve this, the study was conducted using hydrogel to seed maize ratios by weight of 0:1, 1:5, 1:10 and 1:15 at four different drying temperature levels of 25oC, 30oC, 35oC and 40oC at different initial seed maize moisture contents of 16%, 28% and 53% (dry basis). The moisture data obtained were fitted into the five drying models using non-linear regression analysis (MS Excel 2003TM) based on the minimization of sum of squares by adjusting the model constants. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drying model; Seed maize; Hydrogel; Logarithmic model. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3317 |
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| Souza,Antonio Jackson de Jesus; Guimarães,Rubens José; Colombo,Alberto; Sant’Ana,José Antonio do Vale; Castanheira,Dalyse Toledo. |
| ABSTRACT This study aimed to evaluate the use of hydro polymer retainer in the quantitative growth of coffee plants at different levels of irrigation and soil types. The experiment was conducted in pots with seedlings bag in the greenhouse of the Setor de Cafeicultura, Universidade Federal de Lavras. The experimental design was in randomized blocks in factorial (2x4x2): absence or presence of hydro polymer retainer, four levels of irrigation (25%, 50%, 75% and 100%), two soil types (sandy soil and medium texture). At 150 days evaluated the stem diameter, plant height, leaf area, number of leaves, dry weight of shoots, plant dry mass, root dry weight, root dry weight ratio of shoot, leaf area ratio, absolute growth rate, relative growth rate, net... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil types; Greenhouse; Coffea arabica L.; Hydrogel. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100162 |
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| Souza,Antonio Jackson Jesus; Guimarães,Rubens José; Dominghetti,Anderson William; Scalco,Myriane Stella; Rezende,Tiago Teruel. |
| ABSTRACT The aim of this work was to evaluate the use of a water-retaining polymer on the initial growth of coffee plants for different levels of irrigation and types of seedling. The experiment was set up in pots with a clayey soil, in a greenhouse of the Sector for Coffee Production of the Federal University of Lavras, Brazil. The experiment was arranged in a randomised block design into sub-lots with three replications, giving a total of 48 experimental units. Four levels of irrigation (25%, 50%, 75% and 100% of the available water) were randomly assigned to the lots; the type of seedling (grown in bags or tubes) were randomly assigned to the sub-lots, and the use or not of the water-retaining polymer randomly assigned to the sub-sub-lots. In the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seedling containers; Implementation; Coffea arabica L.; Hydrogel. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200334 |
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| Registros recuperados: 15 | |
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