University Center Univates
University Center Univates
Vincenzi A.,Health Science University |
Vincenzi A.,University Center Univates |
Maciel M.J.,Health Science University |
Maciel M.J.,University Center Univates |
And 5 more authors.
American Journal of Food Technology | Year: 2014
Studies describing the ethanol bio-production from ricotta cheese whey still are few and this limits the development of an industrial bioprocess. The aim of this study was to compare the ethanol productivity by several strains of the yeast Kluyveromyces, from non-sterilized and sterilized ricotta cheese whey, named respectively in this study like Non Heat Treated (NHT) and Heat Treated (HT), in order to select the most suitable strain for lactose conversion of this whey into ethanol and check the possible interference of the thermal treatment from ricotta cheese whey in the ethanol productivity. The yeasts K. marxianus ATCC 16045, K. marxianus ATCC 46537, K. marxianus ATCC 12424, K. marxianus CBS 6556 and K. lactis ATCC 24176 were used in this study. The yeast K. marxianus ATCC 16045, K. marxianus ATCC 46537 and K. marxianus ATCC 12424 showed the highest efficiency of ethanol production (η) in HT ricotta cheese whey. The maximal growth rate (μmax) and cell mass productivity (QX) values were found to be highest by K. marxianus ATCC 12424 from HT ricotta cheese whey, whereas the ethanol productivity (QP), yield coefficient for ethanol on cell mass (YP/X) and efficiency of ethanol production were the highest by K. marxianus ATCC 46537 from HT ricotta cheese whey. The yeast strains K. marxianus CBS 6556 and K. lactis ATCC 24176 from both NHT and HT ricotta cheese whey showed the lowest values for the growth kinetics determinants and conversion rate parameters for the ethanol production. In the evaluated culture conditions, the yeast K. marxianus ATCC 46537 from HT ricotta cheese whey showed the best results for ethanol production. © 2014 Academic Journals Inc.
Valmorbida W.,University Center Univates |
Barbosa J.L.V.,University of the Rio dos Sinos Valley |
Barbosa D.N.F.,Feevale University |
Rigo S.J.,University of the Rio dos Sinos Valley
Computer Journal | Year: 2016
Ubiquitous computing aims to make tasks that depend on computing transparent to the users, providing resources and services anytime and anywhere. Currently, libraries have sought to position themselves closer to their users, by adopting ubiquitous technologies. This paper presents an intelligent model to support ubiquitous libraries called U-Library. U-Library specification focuses on relevant aspects to build intelligent systems, such as the use of trails, dynamic profiles, recommendation strategies, ontologies and multi-agent systems (MAS). The model provides appropriate information and tools for librarians to maintain resources and services in a library, as well as tools that enable them to offer better services. We have developed a prototype that was evaluated by volunteers using data from a real library. More than 200 thousand records formed the resources database. The trails database consisted of \sim 7 million records, covering the period from 31 January 2000 to 1 July 2013, and associated with 26 476 users. The group of volunteers that participated of the experiment consisted of 20 clients and 25 librarians. The evaluation sought to measure ease of use and perceived usefulness of U-Library, as well as the quality of the recommendations delivered. The results showed a good acceptance of the model. © 2015 The British Computer Society 2015. All rights reserved.
PubMed | University Center Univates, Federal University of Pelotas, Ceres and Federal University of Rio Grande do Sul
Type: Journal Article | Journal: International journal of sports medicine | Year: 2016
This study aims to analyze the neuromuscular adaptations of sedentary young women between water-based resistance training performed with single and multiple sets. 66 women (24.724.33 years old) were randomly divided into 2 training groups: SS (single set of 30s) and MS (3 sets of 30s). Both groups performed 2 sessions per week for 10 weeks. One repetition maximal test (1RM), muscle endurance test (maximal repetitions at 60% 1RM) and muscle power test (squat and countermovement jump performance) were evaluated at pre- and post-training. To compare neuromuscular variables, a repeated measures ANOVA with a group factor (=0.05) was used. Both groups showed significant increases in 1RM (SS: 14.59%; MS 14.86%), in 60% 1RM (SS: 31.23%; MS: 37.37%), in SJ (SS: 10.9%; MS: 8.3%) and CMJ (SS: 9.1%; MS: 6.8%), without difference between groups. There can be concluded that young and sedentary women presented improvements in different expressions of strength after 10 weeks of training, regardless the volume of training.