Refluxed rice husk ash/NaOH suspension for preparing alkali activated binders

Geopolymers simultaneously containing two waste materials have been developed: fluid catalytic cracking catalyst (FCC) as mineral admixture and rice husk ash (RHA) for preparing an alkaline activator. Alkaline activators were prepared by refluxing aqueous mixtures of ground or original RHA with NaOH. All mortars with alkaline activator containing RHA show compressive strength (cured at 65 °C for 1 day) in the range of 31 41 MPa, which is similar to control mortar prepared using an equivalent mixture of NaOH and water glass. Refluxing times between 30 and 240 min yielded good performance mortars. This new way of valorisation would imply economic and environmental benefits in geopolymer production.GEOCEDEM Project BIA 2011-26947 was financed by Spanish Government, Project 3018/2009 was financed by Generalitat Valenciana, Project AP/35235/11 was financed by AECID, COMBURES Project was financed by Centro de Cooperacion al Desarrollo de la Universitat Politecnica de Valencia ADSIDEO COOPERACIO and OMYA Clariana S.A. and Maicerias Espanolas DACSA S.A. supplied FCC and RHA samples respectively.Bouzón, N.; Paya Bernabeu, JJ.; Borrachero Rosado, MV.; Soriano Martínez, L.; Mitsuuchi Tashima, M.; Monzó Balbuena, JM. (2014). Refluxed rice husk ash/NaOH suspension for preparing alkali activated binders. Materials Letters. 115:72-74. https://doi.org/10.1016/j.matlet.2013.10.001S727411

Carbon footprint of geopolymeric mortar: Study of the contribution of the alkaline activating solution and assessment of an alternative route

[EN] CO2 emissions associated with geopolymeric mortar prepared using spent fluid catalytic cracking catalyst (FCC) were compared to those calculated for plain ordinary Portland cement (OPC) mortar. Commercial waterglass used for preparing the alkaline activating solution for geopolymeric mortar was the main contributing component related to CO2 emission. An alternative route for formulating alkaline activating solution in the preparation of the geopolymeric binder was proposed: refluxing of rice husk ash (RHA) in NaOH solution. Geopolymeric mortar using rice hull ash-derived waterglass led to reduced CO2 emission by 63% compared to the OPC mortar. The new alternative route led to a 50% reduction in CO2 emission compared to geopolymer prepared with commercial waterglass. Replacement of commercial waterglass by rice hull ash- derived waterglass in the preparation of the geopolymer did not cause a significant decrease in the mechanical strength of the mortar. CO2 intensity performance indicators (Ci) for geopolymeric mortars were lower than that found for OPC mortar, indicating that the new route for activating solution led to the lowest C-i valueThe authors are grateful to the Spanish Ministry of Economy and Competitiveness (Project GEOCEDEM BIA 2011-26947), and to Generalitat Valenciana (Project 3018/2009) and 'Centro de Cooperacion al Desarrollo' of the Universitat Politecnica de Valencia (ADSIDEO COOPERACIO, Project COMBURES) for supporting this study, and to DACSA S. A. for supplying RHA samples.Mellado Romero, AM.; Catalan, C.; Bouzón, N.; Borrachero Rosado, MV.; Monzó Balbuena, JM.; Paya Bernabeu, JJ. (2014). Carbon footprint of geopolymeric mortar: Study of the contribution of the alkaline activating solution and assessment of an alternative route. RSC Advances. 4(45):23846-23852. doi:10.1039/C4RA03375BS2384623852445Phair, J. W. (2006). Green chemistry for sustainable cement production and use. 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Effectiveness of rotavirus vaccination in Spain

With the aim of determining rotavirus vaccine effectiveness (RVVE) in Spain, from Oct-2008/Jun-2009, 467 consecutive children below 2 years old with acute gastroenteritis (AGE) were recruited using a pediatric research network (ReGALIP-www.regalip.org) that includes primary, emergency and hospital care settings. Of 467 enrolled children, 32.3% were rotavirus positive and 35.0% had received at least one dose of any rotavirus vaccine. RRVE to prevent any episode of rotavirus AGE was 91.5% (95% CI: 83.7%-95.6%). RVVE to prevent hospitalization by rotavirus AGE was 95.6% (85.6-98.6%). No differences in RVVE were found regarding the vaccine used. Rotavirus vaccines have showed an outstanding effectiveness in Spain

Selective and “Veiled” Demarketing from the Perspective of Black Female Consumers

This study sheds light on the perspective of Black female consumers in regards to certain effects of marketing initiatives adopting the literature on demarketing as a framework. The context examined is their experience with the market of hair beauty and care. Media actions are analyzed along narrative interviews in order to understand the phenomenon. The findings reveal a structural dominant pattern which perpetuates the marginalized status of Black women’s natural traits. Emerging market initiatives point to movements concerning the visibility of such female consumers, who despite being eager to consume, have their demand discouraged. This suggests that they perceive a selective and veiled demarketing, as one of the results of marketing actions. The analysis invites for theoretical reflections on demarketing and veiled racism in Brazil

Como ser homem e ser belo? Um estudo exploratório sobre a relação entre masculinidade e o consumo de beleza How to be a man and be beautiful? An exploratory study on male practices of consumption of beauty

Mudanças recentes vêm afetando as fronteiras de gênero: masculinidade e feminilidade mostram, em muitas situações, delimitações tênues. Porém, muitos ideais tradicionais de gênero persistem no subconsciente do indivíduo (Goldenberg, 2000). A identidade masculina é construída a partir da negação - negando atributos relacionados à mulher, à criança ou ao homossexual - e aqueles que se consideram fora do padrão dominante de masculinidade ainda demonstram medo de serem vistos como homossexuais (Badinter, 1993, e outros). O consumo de beleza está associado ao desejo de promover um aumento da atratividade física e a obtenção dos benefícios sociais correspondentes (Bloch e Richins, 1992). Como a atratividade física é considerada um elemento central da feminilidade, o consumo de práticas de beleza costuma ser maior entre as mulheres. A identidade de gênero masculina está associada a menor preocupação com a aparência, assim, os homens estão menos inclinados a adotarem práticas de beleza. Neste contexto, como pesquisar o tema beleza entre os homens? O objetivo deste estudo exploratório foi contribuir para uma melhor compreensão sobre o consumidor masculino de produtos e serviços de beleza, refletindo sobre padrões estéticos e práticas relacionadas à beleza masculina. Os relatos foram obtidos através de entrevistas em profundidade, usando também técnica projetiva, com dez jovens homens de classe econômica alta no Rio de Janeiro. Diversos aspectos das práticas de beleza são manipulados pelos entrevistados na caracterização de papéis sociais e na construção das identidades de gênero. Poucas foram as práticas de beleza identificadas como permitidas para o gênero masculino. Eles vêem a beleza como facilitadora das relações sociais e amorosas, mas sucesso profissional e inteligência ainda parecem mais importantes. Homem não precisa ser bonito. E não deve se esforçar - ou demonstrar que se esforça - para ser belo. O corpo belo deve ser "efeito colateral" da busca por saúde ou do gosto por esportes. Os relatos sugerem uma estreita associação entre os cuidados de beleza e feminilidade. Então, como ser bonito e masculino ao mesmo tempo? Como cuidar da beleza sem ser mulher? Para preservar a masculinidade é preciso que o comportamento masculino de consumo de produtos e serviços de beleza mantenha-se distante do feminino. Assim, o comportamento da mulher parece servir como um ponto de referência para os entrevistados: eles observam tempo, dedicação e investimento financeiro das mulheres em relação à beleza e, a partir daí, iniciam sua construção do que é 'permitido' ou 'proibido' para suas práticas de beleza.<br>Recent changes have affected the boundaries of gender: masculinity and femininity show, in many situations, blurred boundaries. Even so, many traditional gender ideals still exist in the subconscious of the individual (Goldenberg, 2000). The masculine identity is constructed out of denial - denying the attributes related to women, children or homosexual - and those who consider themselves outside the dominant pattern of masculinity still have fear of being perceived as gay (Badinter, 1993; among others). The consumption of beauty products is associated with the desire to promote an increase in physical attractiveness and achievement of the corresponding social benefits (Bloch and Richins, 1992). Because physical attractiveness is considered a central element of femininity, the consumption practices of beauty is often more important in the construction of women's identity. However, the male gender identity is associated with less concern with appearance, as a consequence, men have less inclination to adopt beauty practices. In this context, how to research such topic as beauty among men? This study aimed to a better understanding of the male consumer of beauty products and services, reflecting on aesthetic values and practices related to male beauty. Data were obtained through in-depth interviews using projective techniques as well, with ten young men of high socioeconomic status in Rio de Janeiro. Several aspects of the practices of beauty seemed to be manipulated by respondents in the characterization of social roles and the construction of gender identities. Few were the practices of beauty identified as allowed for males. They do see beauty as a facilitator of social relations, but intelligence and professional success are seem as more important. Man do not need to be beautiful. And he must not strive - or demonstrate that strives - to be beautiful. The beautiful body must be a "side effect" of search for health or taste for sports. Their accounts suggest a close association between beauty care and femininity. So, how to be beautiful and masculine at the same time? How to take care of beauty without being a woman? In order to preserve the maleness is necessary that the male consumption behavior of beauty products and services remain distant from the feminine. Thus, women's behavior seems to serve as a reference point for the interviewees: they observe time, effort and financial investment women devote to beauty and, thereafter, they start their construction of what is 'allowed' or 'forbidden' concerning their beauty practices

In-hospital care, complications, and 4-month mortality following a hip or proximal femur fracture: the Spanish registry of osteoporotic femur fractures prospective cohort study

We have characterised 997 hip fracture patients from a representative 45 Spanish hospitals, and followed them up prospectively for up to 4 months. Despite suboptimal surgical delays (average 59.1 hours), in-hospital mortality was lower than in Northern European cohorts. The secondary fracture prevention gap is unacceptably high at 85%. PURPOSE: To characterise inpatient care, complications, and 4-month mortality following a hip or proximal femur fracture in Spain. METHODS: Design: prospective cohort study. Consecutive sample of patients ≥ 50 years old admitted in a representative 45 hospitals for a hip or proximal femur fragility fracture, from June 2014 to June 2016 and followed up for 4 months post-fracture. Patient characteristics, site of fracture, in-patient care (including secondary fracture prevention) and complications, and 4-month mortality are described. RESULTS: A total of 997 subjects (765 women) of mean (standard deviation) age 83.6 (8.4) years were included. Previous history of fracture/s (36.9%) and falls (43%) were common, and 10-year FRAX-estimated major and hip fracture risks were 15.2% (9.0%) and 8.5% (7.6%) respectively. Inter-trochanteric (44.6%) and displaced intra-capsular (28.0%) were the most common fracture sites, and fixation with short intramedullary nail (38.6%) with spinal anaesthesia (75.5%) the most common procedures. Surgery and rehabilitation were initiated within a mean 59.1 (56.7) and 61.9 (55.1) hours respectively, and average length of stay was 11.5 (9.3) days. Antithrombotic and antibiotic prophylaxis were given to 99.8% and 98.2% respectively, whilst only 12.4% received secondary fracture prevention at discharge. Common complications included delirium (36.1 %) and kidney failure (14.1%), with in-hospital and 4-month mortality of 2.1% and 11% respectively. CONCLUSIONS: Despite suboptimal surgical delay, post-hip fracture mortality is low in Spanish hospitals. The secondary fracture prevention gap is unacceptably high at > 85%, in spite of virtually universal anti-thrombotic and antibiotic prophylaxis

Alkali-activated binder containing wastes: a study with rice husk ash and red ceramic

In addition to several positive aspects in technical properties, geopolymeric binders have considerable advantages in the environmental point of view, with lower energy consumption and lower CO2 emission. In this study, it was conducted an overview about the utilized materials by some Brazilian researchers in geopolymers production, and also an experiment employing two types of wastes (red ceramic waste and rice husk ash). The compressive strength of the resulting material developed very fast, reaching a value of 11 MPa after one day. The microstructure was evaluated by scanning electron microscopy, revealing a compact microstructure and the presence of starting materials from the red ceramic waste that not completely reacted. The results indicated the feasibility of producing geopolymeric material without using commercial sodium silicate and cured at room temperature, showing an option for building materials production with lower environmental impacts.ISSN:0366-691