1,258 research outputs found
Effect of stocking density of fish on water quality and growth performance of European Carp and leafy vegetables in a low-tech aquaponic system
Aquaponics (AP) is a semi-closed system of food production that combines aquaculture and hydroponics and represents a new agricultural system integrating producers and consumers. The aim of this study was to test the effect of stocking densities (APL, 2.5 kg m-3; APH, 4.6 kg m-3) on water quality, growth performance of the European Carp (Cyprinus carpio L.), and yield of leafy vegetables (catalogna, lettuce, and Swiss Chard) in a low-technology AP pilot system compared to a hydroponic cultivation. The AP daily consumption of
water due to evapotranspiration was not different among treatments with an average value of 8.2 L d-1, equal to 1.37% of the total water content of the system. Dissolved oxygen was
significantly (p < 0.05) different among treatments with the lowest median value recorded with the highest stocking density of fish (5.6 mg L-1) and the highest median value in the
hydroponic control (8.7 mg L-1). Marketable yield of the vegetables was significantly different among treatments with the highest production in the hydroponic control for catalogna
(1.2 kg m-2) and in the APL treatment for Swiss Chard (5.3 kg m-2). The yield of lettuce did not differ significantly between hydroponic control and APL system (4.0 kg m-2 on average).
The lowest production of vegetables was obtained in the APH system. The final weight (515 g vs. 413 g for APL and APH, respectively), specific growth rate (0.79% d-1 vs. 0.68% d-1),
and feed conversion (1.55 vs. 1.86) of European Carp decreased when stocking density increased, whereas total yield of biomass was higher in the APH system (4.45 kg m-3 vs.
6.88 kg m-3). A low mortality (3% on average) was observed in both AP treatments. Overall, the results showed that a low initial stocking density at 2.5 kg m-3 improved the production
of European Carp and of leafy vegetables by maintaining a better water quality in the tested AP system
Universal design as resilient urban space plan strategy. New scenarios for environmental resourcesâ sustainable management
Nowadays, urban framework, stressed by the growing anthropic pressure and its constantly evolving use requests is split by uneven structures, contexts, users and patchy needs, which come out to be inefficient and ineffective in access and management. This fact is directly connected both with morph-functional structure of urban texture and its continuous changing trends. The most important consequences of this situation are some negative effects that produce entropy, mistaken anthropic space uses, ecological networks decrease and most of all a substantial urban life quality reduction connected with mobility problems and non-resilient spacesâ use at the different plan scales. These elements make it necessary to restart thinking about environmental resourcesâ sustainable use and management. Universal design comes out to be a useful tool related to urban space planning strategies in terms of resilient choices and actions. Design for all plan approach also represents a good solution for matching people needs to urban environmental quality improvement. This idea is supported by the experience of a certain case study, that considers universal design application positive effects on open public space plan strategy in Oslo, together with an example of an active use of water to plan a sustainable public space in Rotterdam
Phase-resolved Crab pulsar measurements from 25 to 400 GeV with the MAGIC telescopes
We report on observations of the Crab pulsar with the MAGIC telescopes. Our
data were taken in both monoscopic (> 25GeV) and stereoscopic (> 50GeV)
observation modes. Two peaks were detected with both modes and phase-resolved
energy spectra were calculated. By comparing with Fermi- LAT measurements, we
find that the energy spectrum of the Crab pulsar does not follow a power law
with an exponential cutoff, but has an additional hard component, extending up
to at least 400 GeV. This suggests that the emission above 25 GeV is not
dominated by curvature radiation, as suggested in the standard scenarios of the
OG and SG models.Comment: 4 pages, 2 figures, Proc. TAUP 2011, submitted for publication in
JCP
Strategies to maintain high-quality education and communication among the paediatric and neonatal intensive care community during the COVID-19 pandemic
Short-Term Bisphosphonate Therapy Could Ameliorate Osteonecrosis: A Complication in Childhood Hematologic Malignancies
Osteonecrosis (ON) is a critical complication in the treatment of childhood leukemia and lymphoma. It
particularly affects survivors of acute lymphoblastic leukemia and non-Hodgkin lymphoma reflecting the
cumulative exposure to glucocorticosteroid therapy. ON is often multiarticular and bilateral, specially
affecting weight-bearing joints. A conventional approach suggests a surgical intervention even if
pharmacological options have also recently been investigated. We reported two cases of long time steroid-treated patients who underwent Bone Marrow Transplantation (BMT) for hematological disease. Both
patients developed femoral head osteonecrosis (ON) that was diagnosed by magnetic resonance imaging
(MRI) and the ON was also accompanied with pain and a limp. Despite of the conventional strategies of
therapy, we successfully started a short-term treatment with bisphosphonates in order to decrease the pain
and the risk of fracture
Evaluation of body composition as a potential biomarker in spinal muscular atrophy
INTRODUCTION:
We aimed to investigate the correlation between body composition (BC) and spinal muscular atrophy (SMA)-specific motor function assessments.
METHODS:
Patients with SMA types I or II, aged 1 to 10\u2009years, were recruited in this cross-sectional study. The protocol included anthropometric measurements, and dual-energy X-ray absoprtiometry to assess fat mass (FM), lean mass (LM), fat-free mass (FFM), FM and FFM indexes (FMI, FFMI), and motor function assessments (Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders scale for SMAI, and Hammersmith Functional Motor Scale-Expanded for SMAII).
RESULTS:
Eighty-eight children were included. All had a higher FM percentage than reference values. Motor function was moderately correlated with body mass index (BMI), FFMI, and LMI in SMAI, and weakly correlated with FFMI, LMI, and LM:FM ratio in SMAII.
DISCUSSION:
BC shows promise as a potential biomarker for SMA, but further studies are needed
Avaliação dos aspectos fenológicos na emissão de ramos produtivos do quiabeiro cv. 'Amarelinho' em resposta a variação da densidade de plantio.
A planta do quiabeiro embora apresente algumas diversidades no seu aspecto morfolĂłgico, podem sofrer variaçÔes de comportamento em função do habitat a que estĂŁo submetidas e do sistema de plantio. Neste contexto, o trabalho teve por objetivo avaliar os efeitos do espaçamento na emissĂŁo de ramos produtivos e improdutivos do quiabeiro, cv. Amarelinho.Edição dos Resumos do 45Âș Congresso Brasileiro de Olericultura; 15Âș Congresso Brasileiro de Floricultura e Plantas Ornamentais; 2Âș Congresso Brasileiro de Cultura de Tecidos de Plantas, Fortaleza, 07 a 12 Agosto de 2005
- âŠ