416 research outputs found
Power loss of FZG gears lubricated with wind turbine gear oil using ionic liquid additive
This work presents a study of the tribological behaviour of a mineral fully-formulated
wind turbine gear oil additised with [BMP][NTf2] ionic liquid. The target application are
the wind turbine gearboxes, thus the fully formulated oil with and without ionic liquid
additive was tested in a rolling bearings test rig to measure the thrust rolling bearing
torque loss and was also tested in a FZG gear test rig to measure the gears torque
loss at operating conditions similar to the observed in a wind turbine gearbox.
The results show that a wind turbine gear oil additised with ionic liquid can reduce the
torque loss and improve the gearbox efficiency while producing less wear particles as
observed in the oil analysis.The authors thank to the Ministry of Science and Innovation (Spain) and to the
Foundation for the Promotion in Asturias of the Applied Scientific Research and Technology (FICYT) for supporting this research within the framework of the Research
Projects WINDTRIB (DPI2010-18166) and GRUPIN14-023, respectively.
The authors thank to Repsol S.A. that provided the wind turbine gear oil.
The authors gratefully acknowledge the funding supported by: National Funds through
Fundação para a Ciência e a Tecnologia (FCT), under the project EXCL/SEMPRO/
0103/2012; COMPETE and National Funds through Fundação para a Ciência e
a Tecnologia (FCT), under the project Incentivo/EME/LA0022/2014; Quadro de
Referência Estratégico Nacional (QREN), through Fundo Europeu de
Desenvolvimento Regional (FEDER), under the project NORTE-07-0124-FEDER-
000009 - Applied Mechanics and Product Development; without whom this work would
not be possible
Antiplasmodial and leishmanicidal activities of 2-cyano-3-(4-phenylpiperazine-1-carboxamido) quinoxaline 1,4-dioxide derivatives.
Malaria and leishmaniasis are two of the World’s most important tropical
parasitic diseases. Thirteen new 2-cyano-3-(4-phenylpiperazine-1-carboxamido) quinoxaline
1,4-dioxide derivatives (CPCQs) were synthesized and evaluated for their in vitro
antimalarial and antileishmanial activity against erythrocytic forms of Plasmodium
falciparum and axenic forms of Leishmania infantum. Their toxicity against VERO cells
(normal monkey kidney cells) was also assessed. None of the tested compounds was
efficient against Plasmodium, but two of them showed good activity against Leishmania.
Toxicity on VERO was correlated with leishmanicidal properties
Sensitization to Platanus Occidentalis Tree and Ricinus Communis Weed Pollen in Northern Mexico
El polen Platanus occidentalis (Po) y Ricinus communis (Rc) se capturaron con un Hirst volumétrico (Burkard Manufacturing Co.) en Monterrey. Evaluamos su ensibilización
prevalencia para incluir estos alérgenos en nuestras pruebas rutinarias de punción cutánea (SPT
Investigação em Arqueometalurgia em Portugal, resultados recentes e perspectivas futuras de uma equipa multidisciplinar
Nos últimos anos, uma equipa de investigadores tem-se dedicado à Arqueometalurgia do território hoje português,em colaboração com institutos públicos, universidades,
museus ou empresas de arqueologia. Recentemente,foi aprovado pela Fundação para a Ciência e a Tecnologia o projecto EARLYMETAL, que estuda a evolução metalúrgica
nesse território desde os seus primórdios, no Calcolítico,
até ao período Orientalizante.
Os autores sintetizam os objectivos, os equipamentose as infraestruturas utilizadas, e apresentam alguns dos resultados já obtidos
Intraoperative radiotherapy electron boost followed by moderate doses of external beam radiotherapy in resected soft-tissue sarcoma of the extremities
To analyze the patterns of failure and the toxicity profile of
intraoperative electron beam radiotherapy (IOERT) after resection of soft tissue
sarcomas of the extremities (STS). PATIENTS AND METHODS: Forty-five patients with
extremity STS were treated with IOERT and moderate-dose postoperative
radiotherapy (45-50 Gy). Twenty-six patients were treated for primary disease
(PD) and 19 patients for an isolated recurrence (ILR). Tumor size was >5 cm
(maximum diameter) in 36 patients (80%), and high-grade histology in PD patients
was present in 14 patients (54%). In nine patients, IOERT was used alone, due to
previous irradiation or patient refusal. Chemotherapy (neoadjuvant and/or
adjuvant) was mainly given to high-grade tumors. RESULTS: Nine patients relapsed
in the extremity (20%), and 12 patients in distant sites (28%). Actuarial local
control at 5 years was 88% for patients with negative/close margins and 57% for
patients presenting positive margins (P=0.04). Five patients (11%) developed
neuropathy associated with the treatment. Extremity preservation was achieved in
40 patients (88%). With a median follow-up of 93 months (range: 27-143 months)
for the patients at risk, 25 patients remain alive (a 7-year actuarial survival
rate of 75% for PD and 47% for ILR; P=0.01). CONCLUSIONS: IOERT combined with
moderate doses of external beam irradiation yields high local control and
extremity preservation rates in resected extremity STS. Peripheral nerves in the
IOERT field are dose-limiting structures requiring a dose compromise in the IOERT
component to avoid severe neurological damage
New salicylamide and sulfonamide derivatives of quinoxaline 1,4-di-N-oxide with antileishmanial and antimalarial activities
Continuing with the efforts to identify new active compounds against malaria and leishmaniasis, fourteen new 3-amino-1,4-di-N-oxide quinoxaline-2-carbonitrile derivatives were synthesized and evaluated for their in vitro antimalarial and antileishmanial activity against Plasmodium falciparum Colombian FCR-3 strain and Leishmania amazonensis strain MHOM/BR/76/LTB-012A. Further computational studies to analyze graphic SAR and ADME properties were undertaken. Results indicate that compounds with one halogenous group substituted in position 6 and 7 provide an efficient approach for further development of antimalarial and antileishmanial agents. In addition, interesting ADME properties were foun
Human infection by Angiostrongylus costaricensis in Venezuela: first report of a confirmed case
Industrialized Sunspace Prototype with Solar Heat Storage. Assessment of Post-Occupational Behaviour in Adaptive Facades.
The thermal performance of two passive solar components has been investigated. An attached sunspace with horizontal heat storage and another one with vertical thermal storage were designed in order to optimize the use of solar gains and its storage and distribution in an industrialized component.
These sunspaces have been tested under real conditions, comparing their thermal performance with two commonly used components in residential buildings in Spain: a window and a double window making up an attached sunspace. Different series of experimental measurements were conducted in two test-cells exposed to outdoor conditions in Pamplona (Northern Spain).
As a result, nine scenarios during winter 2011 and six during summer 2012 have been carried out, comparing all of the prototypes two by two with different use modes.
Results show that a sunspace with heat storage takes advantage of the solar energy and improves the indoor thermal performance of the adjacent room during winter in a better way than a window or a simple sunspace, and that it also offers better performance in summer. The best results in winter and summer were obtained when an appropriate use of the component was performed, in concordance with outdoor conditions. Several thermal control keys for the use of these components are suggested
Seed storage conditions change the germination pattern of clonal growth plants in Mediterranean salt marshes.
8 páginas, 4 tablas, 8 figuras.The effect of salinity level and extended exposure to different salinity and flooding conditions on germination patterns of three saltmarsh clonal growth plants (Juncus subulatus, Scirpus litoralis, and S. maritimus) was studied. Seed exposure to extended flooding and saline conditions significantly affected the outcome of the germination process in a different, though predictable, way for each species, after favorable conditions for germination were restored. Tolerance of the germination process was related to the average salinity level measured during the growth/germination season at sites where established individuals of each species dominated the species cover. No relationship was found between salinity tolerance of the germination process and seed response to extended exposure to flooding and salinity conditions. The salinity response was significantly related to the conditions prevailing in the habitats of the respective species during the unfavorable (nongrowth/nongermination) season. Our results indicate that changes in salinity and hydrology while seeds are dormant affect the outcome of the seed-bank response, even when conditions at germination are identical.
Because these environmental-history-dependent responses differentially affect seed germination, seedling density, and probably sexual recruitment in the studied and related species, these influences should be considered for wetland restoration and managementFinancial support from the Spanish Ministry of the Environment (MMA, project 05/99) and the Junta de Andalucía (research group 4086)enabled us to carry out the present work.Peer reviewe
Seed storage conditions change the germination pattern of clonal growth plants in Mediterranean salt marshes.
8 páginas, 4 tablas, 8 figuras.The effect of salinity level and extended exposure to different salinity and flooding conditions on germination patterns of three saltmarsh clonal growth plants (Juncus subulatus, Scirpus litoralis, and S. maritimus) was studied. Seed exposure to extended flooding and saline conditions significantly affected the outcome of the germination process in a different, though predictable, way for each species, after favorable conditions for germination were restored. Tolerance of the germination process was related to the average salinity level measured during the growth/germination season at sites where established individuals of each species dominated the species cover. No relationship was found between salinity tolerance of the germination process and seed response to extended exposure to flooding and salinity conditions. The salinity response was significantly related to the conditions prevailing in the habitats of the respective species during the unfavorable (nongrowth/nongermination) season. Our results indicate that changes in salinity and hydrology while seeds are dormant affect the outcome of the seed-bank response, even when conditions at germination are identical.
Because these environmental-history-dependent responses differentially affect seed germination, seedling density, and probably sexual recruitment in the studied and related species, these influences should be considered for wetland restoration and managementFinancial support from the Spanish Ministry of the Environment (MMA, project 05/99) and the Junta de Andalucía (research group 4086)enabled us to carry out the present work.Peer reviewe
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