346 research outputs found
SUSTAINABILITY, SUSTAINABLE DEVELOPMENT, SUSTAINABLE CHEMISTRY, AND GREEN CHEMISTRY: PARALLELS AND INTERCONNECTIONS
The interconnectedness between sustainability, sustainable development, sustainable chemistry, and green chemistry is evident in the pursuit of innovative solutions that can balance economic, environmental, and social needs, thereby building a more sustainable future for present and future generations. Although these are topics that have been widely discussed in recent years, there are many controversies regarding the exact definition and scope of these terms. The term âGreen Chemistryâ was defined with the Twelve Principles of Green Chemistry, but in recent years, aspects of environmental and social costs need to be incorporated into the definition. Historically, green chemistry has tended to focus on the process, i.e., how a product is made, rather than the properties of the product. So, we generally talk about a process being green or not. This contribution aims to discuss the parallels, interconnections and differences that exist among the concepts within the realms of âSustainabilityâ, âSustainable Developmentâ, âSustainable Chemistryâ, and âGreen Chemistryâ. Additionally, it discusses how these topics play a crucial role in mitigating environmental impacts, conserving natural resources, generating employment, and promoting safer and more sustainable products and processes
In Vitro Cell Culture Infectivity Assay for Human Noroviruses
A 3-dimensional organoid human small intestinal epithelium model was used
CRESCIMENTO INICIAL DE AROEIRA DO SERTĂO (Myracrodruon urundeuva AllemĂŁo) EM DIFERENTES SUBSTRATOS
RESUMOEste trabalho buscou avaliar o crescimento de Myracrodruon urundeuvaAllemĂŁo produzida em substratos preparados com lodo de esgoto, composto orgĂąnico e esterco bovino. O trabalho foi conduzido em casa de vegetação por 120 dias no Viveiro do Centro de ReferĂȘncia em Conservação da Natureza e Recuperação de Ăreas Degradadas â CRAD, BrasĂlia-DF. Foram testados quatro tipos de adubos: (1) OsmocoteÂź; (2) esterco bovino; (3) composto orgĂąnico; e (4) lodo de esgoto seco. Cada adubo foi submetido a trĂȘs composiçÔes diferentes: (1) 25%, (2) 50% e (3) 75%, com exceção da testemunha e do OsmocoteÂź, totalizando 11 tratamentos com 10 repetiçÔes cada. As variĂĄveis analisadas foram: DiĂąmetro do Coleto (DC), Altura da Muda (H), NĂșmero de Folhas (NF), MatĂ©ria Fresca de Parte AĂ©rea (MFPA), MatĂ©ria Seca de Parte AĂ©rea (MSPA), MatĂ©ria Fresca de Raiz (MFR), MatĂ©ria Seca de Raiz (MSR) e Ăndice de Qualidade de Dickson (IQD). As mĂ©dias foram comparadas pelo teste de Tukey a 5% de probabilidade. Os resultados indicaram interação significativa entre os tratamentos. As maiores mĂ©dias foram obtidas nos tratamentos com esterco bovino, seguidas do tratamento com composto. As plantas produzidas apenas com OsmocoteÂź e com lodo de esgoto morreram. O resultado apontou a importĂąncia de incorporar matĂ©ria orgĂąnica ao substrato para produção de mudas de M. urundeuva e o composto orgĂąnico na proporção de 25% equivale ao esterco bovino na proporção de 25, 50 e 75%
Measurement of the cosmic ray spectrum above eV using inclined events detected with the Pierre Auger Observatory
A measurement of the cosmic-ray spectrum for energies exceeding
eV is presented, which is based on the analysis of showers
with zenith angles greater than detected with the Pierre Auger
Observatory between 1 January 2004 and 31 December 2013. The measured spectrum
confirms a flux suppression at the highest energies. Above
eV, the "ankle", the flux can be described by a power law with
index followed by
a smooth suppression region. For the energy () at which the
spectral flux has fallen to one-half of its extrapolated value in the absence
of suppression, we find
eV.Comment: Replaced with published version. Added journal reference and DO
Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory
The Auger Engineering Radio Array (AERA) is part of the Pierre Auger
Observatory and is used to detect the radio emission of cosmic-ray air showers.
These observations are compared to the data of the surface detector stations of
the Observatory, which provide well-calibrated information on the cosmic-ray
energies and arrival directions. The response of the radio stations in the 30
to 80 MHz regime has been thoroughly calibrated to enable the reconstruction of
the incoming electric field. For the latter, the energy deposit per area is
determined from the radio pulses at each observer position and is interpolated
using a two-dimensional function that takes into account signal asymmetries due
to interference between the geomagnetic and charge-excess emission components.
The spatial integral over the signal distribution gives a direct measurement of
the energy transferred from the primary cosmic ray into radio emission in the
AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air
shower arriving perpendicularly to the geomagnetic field. This radiation energy
-- corrected for geometrical effects -- is used as a cosmic-ray energy
estimator. Performing an absolute energy calibration against the
surface-detector information, we observe that this radio-energy estimator
scales quadratically with the cosmic-ray energy as expected for coherent
emission. We find an energy resolution of the radio reconstruction of 22% for
the data set and 17% for a high-quality subset containing only events with at
least five radio stations with signal.Comment: Replaced with published version. Added journal reference and DO
Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy
We measure the energy emitted by extensive air showers in the form of radio
emission in the frequency range from 30 to 80 MHz. Exploiting the accurate
energy scale of the Pierre Auger Observatory, we obtain a radiation energy of
15.8 \pm 0.7 (stat) \pm 6.7 (sys) MeV for cosmic rays with an energy of 1 EeV
arriving perpendicularly to a geomagnetic field of 0.24 G, scaling
quadratically with the cosmic-ray energy. A comparison with predictions from
state-of-the-art first-principle calculations shows agreement with our
measurement. The radiation energy provides direct access to the calorimetric
energy in the electromagnetic cascade of extensive air showers. Comparison with
our result thus allows the direct calibration of any cosmic-ray radio detector
against the well-established energy scale of the Pierre Auger Observatory.Comment: Replaced with published version. Added journal reference and DOI.
Supplemental material in the ancillary file
Genotype and phenotype landscape of MEN2 in 554 medullary thyroid cancer patients: the BrasMEN study
Multiple endocrine neoplasia type 2 (MEN2) is an autosomal dominant genetic disease caused by RET gene germline mutations that is characterized by medullary thyroid carcinoma (MTC) associated with other endocrine tumors. Several reports have demonstrated that the RET mutation profile may vary according to the geographical area. In this study, we collected clinical and molecular data from 554 patients with surgically confirmed MTC from 176 families with MEN2 in 18 different Brazili an centers to compare the type and prevalence of RET mutations with those from other countries. The most frequent mutations, classified by the number of families affected, occur in codon 634, exon 11 (76 families), followed by codon 918, exon 16 (34 families: 26 with M918T and 8 with M918V) and codon 804, exon 14 (22 families: 15 with V804M and 7 with V804L). When compared with other major published series from Europe, there are several similarities and some differences. While the mutations in codons C618, C620, C630, E768 and S891 present a similar prevalence, some mutations have a lower prevalence in Brazil, and others are found mainly in Brazil (G533C and M918V). These results reflect the singular proportion of European, Amerindian and African ancestries in the Brazilian mosaic genome83289298CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTĂFICO E TECNOLĂGICO - CNPQCOORDENAĂĂO DE APERFEIĂOAMENTO DE PESSOAL DE NĂVEL SUPERIOR - CAPESFUNDAĂĂO DE AMPARO Ă PESQUISA DO ESTADO DE SĂO PAULO - FAPESPFUNDAĂĂO DE AMPARO Ă PESQUISA DO ESTADO DO RIO GRANDE DO SUL - FAPERGSSem informaçãoSem informação2006/60402-1; 2010/51547-1; 2013/01476-9; 2014/06570-6; 2009/50575-4; 2010/51546-5; 2012/21942-116/2551-0000482-
Ebola: an international public health emergency
The outbreak of Ebola in West Africa could become one of the worst infectious-disease-driven humanitarian crises of recent times. With more than 3000 deaths since the first case was confirmed in March 2014, the international community has recognized Ebola as a public health emergency of international concern and a clear threat to global health security. The complexity of dealing with this Ebola outbreak has highlighted the need for traditional actors, such as WHO and the CDC, to embrace the wider health and humanitarian community. The epidemic reinforces the need for nations to investment in health infrastructure and disease surveillance to keep pace with other developments in Africa. If Ebola arrives in high-income and middleincome nations, it should be contained quickly. The crisis shows the importance of sufficient levels of multilateral funding for WHO. The world needs a strong WHO, with the financing and political influence to fulfil its historic mission
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