Sustratos como material de última generación

Torres, Oscar Gabriel Villegas; Patiño, Martha Lilia Domínguez; Pérez, Magdalena Albavera; Rodríguez, María Andrade; Nava, Héctor Sotelo; Rangel, Martín Gerardo Martínez; Cortes, Miguel Aguilar; Carpintero, Carlos Castillo; Salazar, María del Carmen Magadan

doi:10.3926/oms.364

Cited by 11 publications

(1 citation statement)

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“…Plant substrate is any solid material other than soil, which allows root anchoring, water and nutrient absorption, and gas exchange from and to the root (27). Commercial substrates constitute mixtures of different products such as blond and black peat moss, pine bark of different granulometry, perlite, sand and humectants (16).…”

Section: Introductionmentioning

confidence: 99%

Pear and apple pomace compost as an alternative to commercial substrates in the production of tomato seedlings

et al. 2021

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It is important to look for alternative substrates to replace non-renewable resources such as peat used in growing media in horticulture. The aim of this work was to evaluate if the compost of pear and apple pomace could be used as an alternative to a commercial substrate for the production of tomato seedlings. Two experiments were carried out on trays with alveoli of 100 cm3 (experiment 1) and 30 cm3 (experiment 2). In experiment 1, three substrates were used: commercial substrate (CS), mixture of CS and pomace compost (CS+C) and pure compost (C). In experiment 2 a fourth treatment with a mixture of compost and perlite (C+P) was incorporated. The obtained results indicate that the development of the seedlings using CS+C and CS as a substrate was similar in cells of 100 cm3 and higher in cells of 30 cm3. In addition, the growth of seedlings on C+P in relation to CS showed similar or higher values in some variables. These results indicate that it would be feasible to replace the use of non-renewable resources such as peat in the production of tomato seedlings by a product obtained from a residue. Tomato seedling growth was evaluated on trays with 100 cm3 alveoli and 30 cm3 alveoli on different substrates mixtures: commercial substrate (CS), mixture of CS and pomace compost (CS+C), pure compost (C) and mixture of compost and perlite (C+P). Highlights Seedling development using CS+C and CS as substrates was similar in cells of 100 cm3 and higher in cells of 30 cm3. Seedling growth on C+P in relation to CS, showed similar or higher values for some variables such as root dry weight, shoot dry weight, stem diameter and shoot height. In 30 cm3 cell trays of the compost and perlite treatment (3:1 v/v), obtained seedling quality would enable a high post-transplant survival percentage. Pear and apple pomace compost may be an alternative to a commercial substrate containing peat for tomato seedlings production (Lycopersicon esculentum Mill.).

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Section: Introductionmentioning

confidence: 99%

Pear and apple pomace compost as an alternative to commercial substrates in the production of tomato seedlings

et al. 2021

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Comparison between Peritoneal Macrophage Activation by Bougainvillea xbuttiana Extract and LPS and/or Interleukins

Figueroa

Abarca-Vargas

Alanis

et al. 2017

BioMed Research International

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Activation of macrophages may be one of the possible approaches in modulating inflammation. We previously reported that Bougainvillea xbuttiana extract showed an immunomodulatory activity. Here we compare the activation of macrophages exposed to B. xbuttiana extract and compare it with the other treatments such as LPS, IL-4, and IL-10. The cytotoxic effect of extract on peritoneal macrophages was determined by the technique of violet crystal staining. To verify the activation of macrophages we used the tests of vacuolization, hydrogen peroxide production, and percentages of cellular expansion and phagocytosis. The levels of interleukins secreted by macrophages treated with the extract, LPS, and cytokines were determined by the biological assay for the determination of TNF levels and by ELISA for all other interleukins. NO levels were evaluated by colorimetric reactions using Griess reagent. Our results showed that B. xbuttiana extract induced (a) low cytotoxicity percentages, (b) increased vacuolization, hydrogen peroxide production and cell expansion and phagocytosis percentages, and (c) decreased production of TNF-α, IFN-γ, IL-1β, and IL-6 and potentiated production of IL-4, IL-10 and TGF-β. These results suggest that B. xbuttiana extract was able to activate the murine macrophages in a manner similar to those macrophages exposed to IL-4 and IL-10.

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Universalismo renovado, ciudadanía social y políticas públicas

Duque Daza

2021

Aleta.rev.desarro.hum.educ.soc.contemp.

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Este artículo analiza tres enfoques sobre las relaciones Estado, sociedad y políticas públicas. El objetivo central es analizar las tres formas de asumir la provisión de bienes y servicios por parte del Estado y la respectiva concepción de la ciudadanía social: la selectividad, el universalismo y el universalismo renovado o de nuevo tipo. La metodología utilizada se basó en la revisión sistemática de autores centrales que han trabajado este tema desde las políticas públicas. Se hizo la revisión, se contrastaron y se determinó la forma de proponer una alternativa a los modelos clásicos. Se describen sus principales características, sus limitaciones, las críticas y las tendencias actuales de reivindicación del papel del Estado en el desarrollo social y humano y el desarrollo de la ciudadanía social. El resultado es una reflexión conceptual y teórica sobre uno de los problemas básicos de la discusión actual sobre estado y ciudadanía sin reiterar y avanzando sobre una tercera alternativa: el universalismo renovado.

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Sustratos como material de última generación

Cited by 11 publications

References 0 publications

Pear and apple pomace compost as an alternative to commercial substrates in the production of tomato seedlings

Pear and apple pomace compost as an alternative to commercial substrates in the production of tomato seedlings

Comparison between Peritoneal Macrophage Activation by Bougainvillea xbuttiana Extract and LPS and/or Interleukins

Universalismo renovado, ciudadanía social y políticas públicas

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