A bibliometric analysis of service climate as a sustainable competitive advantage in hospitality

The purpose of this study is to carry out a systematic literature review and map the service climate in hospitality to discuss the future of the construct as a sustainable competitive advantage. A bibliometric (Bibliometrix) and network (VOSviewer) analysis were conducted in order to review the literature of 63 hospitality service climate articles published between 2005 and 2021, covering 167 authors, 30 journals, 17 countries, and indexed with 241 authors keywords. The “International Journal of Contemporary Hospitality Management” presents the most considerable accumulated growth of the hospitality service climate articles. The content analysis showed a total sample with 3519 customers and 23,068 employees, and all include women and men. The studies were carried out mainly in Asia. The research trend topics revealed that performance is one of the most crucial link factors, and keywords such as service climate, performance, antecedents, and perceptions are closely related. Finally, it is essential to highlight that the new trends are related to technology, industrial revolution 4.0, big data, and HR analytics.info:eu-repo/semantics/publishedVersio

Interrelationship of the kinin system, nitric oxide and eicosanoids in the antigen-induced arthritis in rabbits.

The aim of the present study was to investigate the interrelationship of the kinin system, nitric oxide and eicosanoids in the acute phase of antigen-induced arthritis (AIA) in rabbits. The arthritis was induced in immunized rabbits and the following parameters were evaluated 24 hours later: leukocyte influx (total and differential white cell count), vascular permeability (Evans's blue method), and synovial PMN cell infiltrate. PGE2 and LTB4 (radioimmunoassay) levels were quantified in the synovial fluid. The animals were pre-treated with 20mg/kg/day during 14 days with L-NAME or D-NAME and/or Enalapril (0.12 mg/kg/day-14 days), and/or the B2 antagonist of Bradykinin HOE 140 (0.9 mg/kg). Our results showed that L-NAME was effective in the prevention of AIA with reduction of all Inflammatory parameters analyzed. Enalapril partially reverted the L-NAME anti-inflammatory effects. The simultaneous treatment with HOE 140 abolished this reversion and returned the inflammatory parameters to the levels observed in L-NAME treated animals. Our results suggest that pressoric alterations induced by L-NAME could not account for all its anti-inflammatory action in this model of experimental arthritis. Additionally the contribution of the kinin system in AIA was characterized as well as its interaction with eicosanoids and nitric oxide

Força gravitacional exercida por uma casca esférica sobre um corpo acelerado dentro dela

Em 1687, Newton demonstrou que é nula a força gravitacional exercida por uma casca esférica com distribuição uniforme de massa sobre um corpúsculo localizado em qualquer ponto do seu interior. Como a lei universal de gravitação proposta por Newton considera que a interação gravitacional só depende da distância entre os corpos que se atraem, então a força exercida pela casca deve permanecer nula mesmo que o corpúsculo esteja em movimento em relação à casca. Esse mesmo resultado nulo também é previsto pela teoria da Relatividade Geral, de Einstein. Nesta nota, mostramos que a Mecânica Relacional fornece um resultado não-nulo quando o corpo, inicialmente parado, é acelerado em relação à casca

Relationship between land use and spatial variability of atmospheric brown carbon and black carbon aerosols in Amazonia

The aerosol radiative effect is an important source of uncertainty in estimating the anthropogenic impact of global climate change. One of the main open questions is the role of radiation absorption by aerosols and its relation to land use worldwide, particularly in the Amazon Rainforest. Using AERONET (Aerosol Robotic Network) long-term measurements of aerosol optical depth (AOD) at a wavelength of 500 nm and absorption AOD (AAOD) at wavelengths of 440, 675, and 870 nm, we estimated the fraction and seasonality of the black carbon (BC) and brown carbon (BrC) contributions to absorption at 440 nm. This was conducted at six Amazonian sites, from central Amazon (Manaus and the Amazon Tall Tower Observatory—ATTO) to the deforestation arc (Rio Branco, Cuiabá, Ji-Paraná, and Alta Floresta). In addition, land use and cover data from the MapBiomas collection 6.0 was used to access the land transformation from forest to agricultural areas on each site. The results showed, for the first time, important geographical and seasonal variability in the aerosol optical properties, particularly the BC and BrC contributions. We observed a clear separation between dry and wet seasons, with BrC consistently accounting for an average of approximately 12% of the aerosol AAOD at 440 nm in the deforestation arc. In central Amazon, the contribution of BrC was approximately 25%. A direct relationship between the reduction in forests and the increase in the area dedicated to agriculture was detected. Moreover, places with lower fractions of forest had a smaller fraction of BrC, and regions with higher fractions of agricultural areas presented higher fractions of BC. Therefore, significant changes in AOD and AAOD are likely related to land-use transformations and biomass burning emissions, mainly during the dry season. The effects of land use change could introduce differences in the radiative balance in the different Amazonian regions. The analyses presented in this study allow a better understanding of the role of aerosol emissions from the Amazon Rainforest that could have global impacts

Brazilian Science and Research Integrity: Where are We? What Next?

Building a world-class scientific community requires first-class ingredients at many different levels: funding, training, management, international collaborations, creativity, ethics, and an understanding of research integrity practices. All over the world, addressing these practices has been high on the science policy agenda of major research systems. Universities have a central role in fostering a culture of research integrity, which has posed additional challenges for faculty, students and administrators - but also opportunities. In Brazil, the leading universities and governmental funding agencies are collaborating on this project, but much remains to be done.</jats:p

Oxidación superficial del ZnS durante la molienda

Was studied by measurements of zeta potential and analysis by FTIR oxidation and Surface modification ore sphalerite containing iron during autogenous grinding in inert mill (manufactured nylamid), this as function on the reaction pH and chemical conditions of the aqueous medium. Experimental results show that particles sphalerite are surface modified during wet grinding, due to the oxidation of zinc and the presence of surface sulfur mineral forming: oxy-hydroxide iron oxy- hydroxide and complex sulfate coordinated with iron in a mono or bidentate manner respectively, determined by infrared spectroscopy, Fourier transform (FTIR) species. Notwithstanding the absence of contact surfaces of iron (steel grinding media) sphalerite strongly tends to oxidize. Particles sphalerite obtained at different milling times and pH, generally have zeta potential values (PTZ) positive, however for some milling times and pH values, reverse their magnitude and polarity, while at acid pH zeta potential of sphalerite presents negative values. &nbsp; &nbsp;Se estudió, mediante mediciones de potencial zeta y análisis por FTIR la oxidación y modificación&nbsp;superficial de mineral de esfalerita conteniendo hierro, durante la molienda autógena en molino inerte (fabricado de nylamid), esto en función del pH de reacción y de las condiciones químicas del medio acuoso. Los resultados experimentales muestran que las partículas de esfalerita son modificadas superficialmente durante la molienda en húmedo, debido a la oxidación del zinc y el azufre superficial del mineral formando: oxi-hidróxido de hierro, oxi-hidróxido sulfato de hierro y complejos sulfato coordinados con hierro de manera mono o bidentado respectivamente, especies determinadas mediante FTIR. No obstante, la ausencia del contacto con superficies de hierro (medios de acero de molienda) la esfalerita tiende fuertemente a oxidarse. Las partículas de esfalerita obtenidas a diferentes tiempos de molienda y pH, generalmente presentan valores de potencial zeta positivo, sin embargo, para algunos tiempos de molienda y valores de pH, invierten su magnitud y polaridad, mientras que, a un valor de&nbsp;pH ácido el potencial zeta de la esfalerita presenta valores negativos

The medicine selection process in four large university hospitals in Brazil: Does the DTC have a role?

Knowledge about evidence-based medicine selection and the role of the Drug and Therapeutics Committee (DTC) is an important topic in the literature but is scarcely discussed in Brazil. Our objective, using a qualitative design, was to analyze the medicine selection process performed in four large university hospitals in the state of Rio de Janeiro. Information was collected from documents, interviews with key informants and direct observations. Two dimensions were analyzed: the structural and organizational aspects of the selection process and the criteria and methods used in medicine selection. The findings showed that the DTC was active in two hospitals. The structure for decision-making was weak. DTC members had little experience in evidence-based selection, and their everyday functions did not influence their participation in DTC activities. The methods used to evaluate evidence were inadequate. The uncritical adoption of new medicines in these complex hospital facilities may be hampering pharmaceutical services, with consequences for the entire health system. Although the qualitative approach considerably limits the extent to which the results can be extrapolated, we believe that our findings may be relevant to other university hospitals in the country