GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Performance of distinct strategies on overcoming dormancy in Senna obtusifolia seeds
    Revista Engenharia na Agricultura ; 2022
    In:  Revista Engenharia na Agricultura - REVENG Vol. 30 ( 2022-10-24), p. 383-391
    Details
    In: Revista Engenharia na Agricultura - REVENG, Revista Engenharia na Agricultura, Vol. 30 ( 2022-10-24), p. 383-391
    Abstract: Senna obtusifolia presents structures favorable to the effects of the dormancy phenomenon, presenting low germination rates for a certain period. This panorama can be solved by the dormancy-breaking process, which is caused by the exposure of the seed to adverse conditions that stimulate the germination process. Accordingly, this study aimed to evaluate the efficiency of different methods to overcome dormancy in Senna obtusifolia (L.) H. S. Irwin & Barneby seeds. A completely randomized design (CRD) was the experimental design adopted, with four treatments and eight replications of 25 seeds. The treatments consisted of mechanical scarification, water imbibition, and immersion in hot water. In this study, a statistically significant difference was seen between treatments for all parameters, where the treatment under mechanical scarification was the most effective for promoting germination (99 ± 1.51% of germinated seeds). Furthermore, the treatment presented the most promising results for average shoot length (ASL) (43.95 ± 8.66 mm), root length (ARL) (28.09 ± 5.27 mm), total fresh mass (MF) (1.97 ± 0.10 g), and total dry mass (MS) (0.37 ± 0.03 g). The mechanical scarification of seeds favored germination and this treatment was the most efficient for the process of overcoming the dormancy of S. obtusifolia seeds.
    Type of Medium: Online Resource
    ISSN: 2175-6813 , 1414-3984
    URL: Article
    DOI: 10.13083/reveng.v30i1.14267
    Language: Unknown
    Publisher: Revista Engenharia na Agricultura
    Publication Date: 2022
    detail.hit.zdb_id: 2558705-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Potencial de aplicação do resíduo de cinza de casca de arroz
    Universidade Federal de Santa Maria ; 2020
    In:  Ciência e Natura Vol. 42 ( 2020-02-07), p. e48-
    Details
    In: Ciência e Natura, Universidade Federal de Santa Maria, Vol. 42 ( 2020-02-07), p. e48-
    Abstract: The use of agricultural waste has become a necessity due to its high environmental cost. As an example of this, we have rice husk ash (CCA), produced by the indiscriminate burning of rice husk, as well as the need to look for alternatives to reuse the waste sustainably, either by applying it to nanomaterials or by extracting SiO2 present in rice husk ash. This study addresses the use of characterization techniques for rice husk ash residue, showing the quality of SiO2 present in the residue.
    Type of Medium: Online Resource
    ISSN: 2179-460X , 0100-8307
    URL: Article
    DOI: 10.5902/2179460X40716
    Language: Unknown
    Publisher: Universidade Federal de Santa Maria
    Publication Date: 2020
    detail.hit.zdb_id: 2578386-5
    SSG: 11
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Nanomateriais à base de óxidos de ferro suportados com resíduos ricos em sílica
    Universidade Federal de Santa Maria ; 2019
    In:  Ciência e Natura Vol. 40 ( 2019-03-12), p. 225-
    Details
    In: Ciência e Natura, Universidade Federal de Santa Maria, Vol. 40 ( 2019-03-12), p. 225-
    Abstract: Nanoparticles can be obtained through different chemical components, such as iron oxides that have the advantages of easy synthesis, low toxicity, biocompatibility, high adsorption capacity and low cost. Since, the NPs have quite peculiar characteristics differing significantly from other materials mainly by the increase of the surface area and also by the quantum effects. The objective of this work is to obtain Nanomaterials based on iron oxides supported by different residues (rice husk ash, red ceramics and agate), composed mostly of SiO2, using the polyol method, and to evaluate the possibility of using them in different applications, for example, in the field of catalysis and in various engineering processes. The Nanomaterials were characterized with experimental techniques existing in the National Synchrotron Light Laboratory (LNLS), which allow the electronic and structural investigation of Nanomaterials such as X-ray Induced Photoelectron Spectroscopy (XPS). The study allowed to identify that it was possible to use residues with SiO2 in the obtaining of NPs, as well as, confirmed that there is differentiation in their structure. Enabling the expansion of studies in relation to the application of these Nanomaterials.
    Type of Medium: Online Resource
    ISSN: 2179-460X , 0100-8307
    URL: Article
    DOI: 10.5902/2179460X35524
    Language: Unknown
    Publisher: Universidade Federal de Santa Maria
    Publication Date: 2019
    detail.hit.zdb_id: 2578386-5
    SSG: 11
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Encapsulation of Bioactive Compounds for Food and Agricultural Applications
    MDPI AG ; 2022
    In:  Polymers Vol. 14, No. 19 ( 2022-10-06), p. 4194-
    Details
    In: Polymers, MDPI AG, Vol. 14, No. 19 ( 2022-10-06), p. 4194-
    Abstract: This review presents an updated scenario of findings and evolutions of encapsulation of bioactive compounds for food and agricultural applications. Many polymers have been reported as encapsulated agents, such as sodium alginate, gum Arabic, chitosan, cellulose and carboxymethylcellulose, pectin, Shellac, xanthan gum, zein, pullulan, maltodextrin, whey protein, galactomannan, modified starch, polycaprolactone, and sodium caseinate. The main encapsulation methods investigated in the study include both physical and chemical ones, such as freeze-drying, spray-drying, extrusion, coacervation, complexation, and supercritical anti-solvent drying. Consequently, in the food area, bioactive peptides, vitamins, essential oils, caffeine, plant extracts, fatty acids, flavonoids, carotenoids, and terpenes are the main compounds encapsulated. In the agricultural area, essential oils, lipids, phytotoxins, medicines, vaccines, hemoglobin, and microbial metabolites are the main compounds encapsulated. Most scientific investigations have one or more objectives, such as to improve the stability of formulated systems, increase the release time, retain and protect active properties, reduce lipid oxidation, maintain organoleptic properties, and present bioactivities even in extreme thermal, radiation, and pH conditions. Considering the increasing worldwide interest for biomolecules in modern and sustainable agriculture, encapsulation can be efficient for the formulation of biofungicides, biopesticides, bioherbicides, and biofertilizers. With this review, it is inferred that the current scenario indicates evolutions in the production methods by increasing the scales and the techno-economic feasibilities. The Technology Readiness Level (TRL) for most of the encapsulation methods is going beyond TRL 6, in which the knowledge gathered allows for having a functional prototype or a representative model of the encapsulation technologies presented in this review.
    Type of Medium: Online Resource
    ISSN: 2073-4360
    URL: Article
    DOI: 10.3390/polym14194194
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2527146-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Thermal hydrolysis of olive leaves and stems to obtain fermentable sugars
    Revista Engenharia na Agricultura ; 2021
    In:  Revista Engenharia na Agricultura - Reveng Vol. 29 ( 2021-11-10), p. 325-334
    Details
    In: Revista Engenharia na Agricultura - Reveng, Revista Engenharia na Agricultura, Vol. 29 ( 2021-11-10), p. 325-334
    Abstract: Subcritical water hydrolysis was used for the pre-treatment of residues generated in olive groves. Fermentable sugars were produced from the lignocellulosic material found in olive leaves and stems. Firstly, moisture, ash, particle average diameter, and total extracts were measured. Afterward, subcritical water hydrolysis was carried out at 20 MPa in a 50 mL reactor. The influences of two temperatures (180 and 220 °C) and two water flow rates (10 and 20 mL min-1) on the sugars yields were evaluated. The concentration of sugars was 31.3 g L-1 at 180 °C and 10 mL min-1 in a reaction for 3 min, of which glucose was the major sugar (27.64 g L-1). Statistical analysis was performed using Sisvar® 5.6 software and the averages were compared through Tukey’s test, considering a significance level of 95% (p 〈 0.05). For the treatments evaluated in this work, only xylose was statistically different in the treatments with different water flow rates. The highest values of xylose were obtained with 10 mL min-1, which were 1.82 g L-1 (180 °C) and 2.18 g L-1 (220 °C). The total inhibitors were high at 220 °C for all water flow rates, with a significant difference from the averages obtained at 180 °C.
    Type of Medium: Online Resource
    ISSN: 2175-6813 , 1414-3984
    URL: Article
    DOI: 10.13083/reveng.v29i1.12559
    Language: Unknown
    Publisher: Revista Engenharia na Agricultura
    Publication Date: 2021
    detail.hit.zdb_id: 2558705-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Obtenção de catalisador nanoestruturado utilizando óxido de ferro suportado em resíduo de cerâmica vermelha
    Universidade Federal de Santa Maria ; 2019
    In:  Ciência e Natura Vol. 40 ( 2019-03-12), p. 94-
    Details
    In: Ciência e Natura, Universidade Federal de Santa Maria, Vol. 40 ( 2019-03-12), p. 94-
    Abstract: The use of nanoparticles in the field of catalysis has been the object of study by the scientific community, due to the high catalytic activity that the nanoparticles have in front of some reactions of technological interest. The objective of this work is to obtain a nanostructured catalyst using iron oxide supported on red ceramic residue (RCV), through nanostructures synthesized by the hydrothermal method, measured through the absorption of lightning in the XANES region through the National Laboratory of Synchrotron Light LNLS).
    Type of Medium: Online Resource
    ISSN: 2179-460X , 0100-8307
    URL: Article
    DOI: 10.5902/2179460X35504
    Language: Unknown
    Publisher: Universidade Federal de Santa Maria
    Publication Date: 2019
    detail.hit.zdb_id: 2578386-5
    SSG: 11
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...