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1.
PLoS One ; 19(6): e0305140, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38913663

RESUMO

At the beginning of this century, the advent of a second generation of 'quantum technologies' was announced together with its revolutionary potential to change existing information technologies. Despite the rapidly increasing paid to quantum technological development, there has been little attention paid to the specific characteristics or relationships within emerging quantum ecosystems. The aim of this study is to visualize the innovation structures and relationships that are emerging to shape these technological developments. As these structures typically depend on specific regional features, we have specifically focused on the Spanish case, as it is potentially indicative of the differences between European innovation models and other regional patterns. This objective was achieved by researching the funding network of the ecosystem, collected from a systematic review of various official sources and relevant previous literature. The resulting dataset was framed using the Innovation Ecosystem model and broken down through network analysis theory, as well as characterized through descriptive statistics. This framework identified the significant role that projects play in European scientific and technological innovation, which work as hubs to concentrate resources and incentive cooperation between actors. This is relevant because current work on quantum technologies neglects their importance, as their analysis focuses on the quantity of institutions rather than their relations. Moreover, this paper points out the prominence of public funding to drive quantum innovation, largely stemming from the European Commission. This is another key mechanism that is missed by the existing literature. Finally, it also sheds light on the recipients of this funding, who are mostly research centres. These results allow us to conceptualize the Spanish quantum ecosystem and offer the opportunity for comparative studies with other quantum technologies ecosystems.


Assuntos
Teoria Quântica , Espanha , Invenções , Humanos
2.
Biol Res ; 51(1): 4, 2018 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-29338771

RESUMO

Aquaporins (AQP) are channel proteins belonging to the Major Intrinsic Protein (MIP) superfamily that play an important role in plant water relations. The main role of aquaporins in plants is transport of water and other small neutral molecules across cellular biological membranes. AQPs have remarkable features to provide an efficient and often, specific water flow and enable them to transport water into and out of the cells along the water potential gradient. Plant AQPs are classified into five main subfamilies including the plasma membrane intrinsic proteins (PIPs), tonoplast intrinsic proteins (TIPs), nodulin 26 like intrinsic proteins (NIPs), small basic intrinsic proteins (SIPs) and X intrinsic proteins (XIPs). AQPs are localized in the cell membranes and are found in all living cells. However, most of the AQPs that have been described in plants are localized to the tonoplast and plasma membranes. Regulation of AQP activity and gene expression, are also considered as a part of the adaptation mechanisms to stress conditions and rely on complex processes and signaling pathways as well as complex transcriptional, translational and posttranscriptional factors. Gating of AQPs through different mechanisms, such as phosphorylation, tetramerization, pH, cations, reactive oxygen species, phytohormones and other chemical agents, may play a key role in plant responses to environmental stresses by maintaining the uptake and movement of water in the plant body.


Assuntos
Aquaporinas/metabolismo , Transporte Biológico/fisiologia , Plantas/metabolismo , Estresse Fisiológico/fisiologia , Aquaporinas/fisiologia , Expressão Gênica
3.
Biol. Res ; 51: 4, 2018. tab, graf
Artigo em Inglês | LILACS | ID: biblio-888434

RESUMO

Abstract Aquaporins (AQP) are channel proteins belonging to the Major Intrinsic Protein (MIP) superfamily that play an important role in plant water relations. The main role of aquaporins in plants is transport of water and other small neutral molecules across cellular biological membranes. AQPs have remarkable features to provide an efficient and often, specific water flow and enable them to transport water into and out of the cells along the water potential gradient. Plant AQPs are classified into five main subfamilies including the plasma membrane intrinsic proteins (PIPs), tonoplast intrinsic proteins (TIPs), nodulin 26 like intrinsic proteins (NIPs), small basic intrinsic proteins (SIPs) and X intrinsic proteins (XIPs). AQPs are localized in the cell membranes and are found in all living cells. However, most of the AQPs that have been described in plants are localized to the tonoplast and plasma membranes. Regulation of AQP activity and gene expression, are also considered as a part of the adaptation mechanisms to stress conditions and rely on complex processes and signaling pathways as well as complex transcriptional, translational and posttranscriptional factors. Gating of AQPs through different mechanisms, such as phosphorylation, tetramerization, pH, cations, reactive oxygen species, phytohormones and other chemical agents, may play a key role in plant responses to environmental stresses by maintaining the uptake and movement of water in the plant body.


Assuntos
Plantas/metabolismo , Estresse Fisiológico/fisiologia , Transporte Biológico/fisiologia , Aquaporinas/metabolismo , Expressão Gênica , Aquaporinas/fisiologia
4.
Addict Health ; 1(2): 63-8, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-24494085

RESUMO

BACKGROUND: Considering the fear of drug addicts from hangover symptoms and the costs of withdrawal treatment and their importance in deciding to withdraw, it is helpful to identify various ways of withdrawal and their effects. This study investigated the withdrawal symptoms of two methods of detoxification with clonidine and rapid detoxification of clonidine with naltrexone. METHODS: This was a clinical trial study. Patients referred to Shahid Beheshti hospital for narcotic addiction treatment were randomly divided into two groups. Group matching was done based on entry and excluding criteria. Data were collected using a demographic questionnaire including questions on the drug abuse and the consumption method, and a questionnaire on the symptoms of opioid withdrawal. FINDINGS: Restlessness, vomiting, feeling sick and significant decrease of diastolic blood pressure was higher in rapid detoxification method group. However, considering background variables, Spearman correlation coefficient showed significant relationship just for lacrimation. Temptation for drug consumption was lower for heavy abusers in rapid detoxification method and in general, those who had higher amount of consumption and were treated by rapid detoxification, experienced less temptation for consumption. CONCLUSION: Rapid detoxification can be the first level treatment for heavy abusers, because it reduces the temptation for drug consumption and has shorter hospitalization and, as a result, has lower cost.

5.
Arch Med Res ; 39(2): 205-8, 2008 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-18164964

RESUMO

BACKGROUND: Recognition of HLA alleles is useful in transplantation and in anthropological and disease studies. Acute lymphoblastic leukemia (ALL) is the most common blood cancer. It is now generally agreed that both genetic and environmental factors play an interactive role in the development of ALL disease. It is unknown whether there exists a restriction to certain MHC genotypes in leukemia like ALL. METHODS: Genetic construct of HLA DRB1 was studied in Iranian normal populations and in patients with acute lymphoblastic leukemia using PCR-SSP method. RESULTS: It was shown that the most common allele in DRB1 locus in normal population was DRB1*11 (20%), whereas DRB1*09 was the least frequent allele (0.9%). Additionally, this study presented the results of HLA-DRB1 typing in 106 ALL patients and compared them with normal individuals. Comparison of the results between the normal population and the patient group revealed that there was allelic association between the DRB1*13 and the disease. Results showed that the difference between the frequencies of DRB1*13 in patients and normal individuals was significant (p=0.04), but there was a moderate difference among the frequencies of DRB1*04, *07, and *09 in childhood (0-15 years) ALL. The frequencies of DRB1*13, *04, and *07 in patients were 2.5, 16, 4.5% and, in normal individuals, were 11.4, 10, and 8.3%, respectively. CONCLUSIONS: It should be concluded that DRB1*13, which showed a decrease in patients, should be protective against acute lymphoblastic leukemia (ALL), whereas DRB1*04, which was moderately increased in patients, could be considered a susceptible allele for childhood ALL.


Assuntos
Alelos , Frequência do Gene/genética , Antígenos HLA-DR/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Frequência do Gene/imunologia , Antígenos HLA-DR/imunologia , Cadeias HLA-DRB1 , Humanos , Lactente , Recém-Nascido , Irã (Geográfico) , Masculino , Reação em Cadeia da Polimerase , Leucemia-Linfoma Linfoblástico de Células Precursoras/epidemiologia , Leucemia-Linfoma Linfoblástico de Células Precursoras/imunologia
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