22 research outputs found
Quince (Cydonia oblonga) in vitro plant root formation through an automated temporary inmersion system, and its acclimation
ArtĂculo cientĂficoQuince (Cydonia oblonga) is a non-traditional fruit tree found in Costa Rica that has
therapeutic and nutritional properties; however its slow growth and root formation prevents the production
of a homogeneous population when using conventional farming techniques. Hence, the aim of this research
project was to generate uniform plant material in a reduced time span using a temporary immersion bioreactor
system (RITAS Âź). A semisolid rooting MS culture medium supplemented with 0.1 mg L-1 NAA; 0.3 mg L-1
IBA and 3% sucrose (pH 6.5), developed in the Centro de InvestigaciĂłn en BiotecnologĂa (CIB), Instituto
TecnolĂłgico de Costa Rica (ITCR), in Cartago, was used as a reference medium. Four different variations
in the sucrose concentration (1%, 2%, 3%, and 4%) were performed in liquid medium. Each trial was
evaluated with in vitro plants which had been previously exposed to the culture medium of the corresponding
treatments, in a stationary mode and for a 15 day long period, and with in vitro plants without any previous
treatment (a total of eight treatments). The comparison of the root formation percentages evidenced the clear
effect of sucrose concentration used, with the best results obtained when using the 2% sucrose trial with no
pre-treatment (73.3%). The in vitro plants were acclimated in cylinders made out of peat, have previously
been disinfected with fungicide, and placed in a humidity chamber at a 20.5°C average temperature and a
75,5% relative humidity for the establishment of weekly fertilizing cycles. The acclimation process generated
an 80% survival rate, since several seedlings experienced stem strangulation caused by a fungal attack.
The conidiophores identified through optical and scanning electron microscopy evidenced the presence of
Cladosporium spp., which was controlled with carbendazim and iprodione fungicides
The ontological plurality of digital voice: a schizoanalysis of Rate My Professors and Rate My Teachers
Integrating Human-Centred Design Approach into Sustainable-Oriented 3D Printing Systems
Modern 3D printing systems have become pervasive and widely used both in professional and in informal contexts, including sustainable-oriented ones. However, the risk to create very effective but non-sustainable solutions is very high since 3D printing systems could potentially increase the environmental emergencies and the unsustainable growth. In the transition process toward sustainable ways of production and consumption, the so-called human factor still plays an important role in the achievement of sustainable-oriented actions; it drives the adoption of proper lifestyles that directly and indirectly influence the ways through which such technologies are used. Therefore, future Sustainable 3D Printing Systems should integrate the humans in the systemsâ development. This study presents two important results: (a) it presents a set of interdisciplinary âSustainable 3D Printing Systemsâ, which compose a promising sustainable-oriented scenario useful to support the transition processes toward sustainable designs and productions, and (b) it proposes a new strategy for the integration of human-centred aspects into Sustainable 3D Printing Systems, by combining insights from human-centred design approach
ENRAIZAMIENTO DE VITROPLANTAS DE MEMBRILLO (Cydonia oblonga) POR MEDIO DE INMERSIĂN TEMPORAL AUTOMATIZADA Y SU ACLIMATACIĂN
Sustainable 3D Printing: Design Opportunities and Research Perspectives
As 3D Printing process, technologies and tools are rapidly becoming pervasive and used both in industrial and in non-industrial contexts, the risk to have new unsustainable printing processes and productionâs behaviours is high and, potentially, can led to the increasing of environmental emergency (unsustainable growth). On the other hand, Design for Sustainability works, since late 80âs, on the mitigation of productionâs environmental foot-print and, recently, on the development of socio-technical systems and distributed hybrid solutions empowering both environmental aspects and socio-economic ones. This paper investigates the new concept of Sustainable 3D Printing using recent Design for Sustainabilityâs research theories and design approaches, in order to evaluate, and later describes, promising design opportunities and research perspectives that can be used and taken into account, simultaneously, by designers, researchers, entrepreneurs and policymakers to support the societal transition toward sustainable ways of design, production and consumption