UTILIZAÇÃO da PRÓPOLIS E ÁLCOOL ETÍLICO NO CONTROLE DE Salmonella em RAÇÕES AVÍCOLAS

Em quatro experimentos foram avaliados como agentes antibacterianos os produtos própolis em solução alcoólica e álcool etílico, adicionados às rações artificialmente contaminadas com os respectivos sorotipos: Salmonella typhimurium Nalr - Specr, (resistentes ao ácido Nalidíxico e a Spectinomicina) nos três primeiros experimentos e Salmonella agona Nalr - Specr, Salmonella infantis Nalr - Specr e Salmonella enteritidis Nalr - Specr no quarto experimento. As rações foram fornecidas a grupos de 10-16 pintos de corte de um dia. em todos os experimentos os produtos testados foram adicionados na base de 2% da ração. Quando se utilizou solução hidroalcóolica de própolis (exp. 1), seguidas 120 horas após o desafio, detectou-se a presença da bactéria nos cecos. No segundo experimento, testou-se a solução de própolis e seu diluente, o álcool etílico; seguidas 96 horas após o desafio, não foi observada a presença da bactéria nos cecos (< 2,0 log10). Avaliou-se, no terceiro experimento, a ação da solução de própolis e do álcool etílico no tempo, adicionados na ração 14 dias e 28 dias antes do fornecimento às aves. Após 72 horas do desafio, a leitura nas placas acusou a presença da bactéria nos cecos. Dentro deste último período, também se avaliou a ação da própolis em pó (extrato seco) e esse mesmo extrato em uma solução aquosa, adicionados à ração 48 horas antes do fornecimento às aves sendo que os resultados confirmaram a presença da bactéria nos cecos. No quarto experimento avaliou-se somente o álcool etílico nas rações artificialmente contaminadas com os sorotipos S. agona, S. enteritidis e S. infantis, registrando-se contagem zero (<2,0 log10) apenas com o último sorotipo. Os resultados obtidos permitem concluir que o tratamento com a solução de própolis apresentou ação sobre a S. typhimurium somente quando em solução alcóolica, dentro de um período de 48 horas, indicando que o efeito bactericida se deveu ao álcool etílico presente na solução. A ação do tratamento com o álcool etílico sobre os demais sorotipos demonstrou resultado parcial sendo observado efeito bactericida nos sorotipos S. typhimurium e S. enteritidis artificialmente inoculados na ração.

Emergência e desenvolvimento de guanxuma (Sida rhombifolia), capim-braquiária (Brachiaria decumbens) e cana-de-açúcar (Saccharum spp.) influenciados por subprodutos da destilação do álcool

Este trabalho objetivou avaliar os efeitos da aplicação de óleo de fúsel, comparativamente a vinhaça e flegmaça, sobre o desenvolvimento e a composição química de plantas de guanxuma (Sida rhombifolia), capim-braquiária (Brachiaria decumbens) e cana-de-açúcar (variedade RB72454), cultivadas simultaneamente em casa de vegetação. As concentrações de 12,5; 25,0; 50,0; e 100,0% (v/v) de cada subproduto e a testemunha (água) foram aplicadas (numa taxa equivalente a 150 m³ ha-1) no solo dos vasos (22 L), contendo uma planta de cana-de-açúcar (13 cm de altura) e 100 sementes de cada planta daninha. O delineamento foi o inteiramente casualizado, com 13 tratamentos e 4 repetições, em esquema fatorial 3 x 4 (três tipos de resíduos e quatro concentrações), e uma testemunha adicional com água. O óleo de fúsel inibiu a emergência de Sida rhombifolia e Brachiaria decumbens e matou a cana-de-açúcar. A vinhaça e a flegmaça prejudicaram a emergência e o desenvolvimento de B. decumbens, bem como o de S. rhombifolia, mas não o da cana-de-açúcar.

Análise estatística das emissões de CO e HC produzidas por gases da exaustão veicular oriundos de gasolina, GNV e mistura álcool/gasolina

The vehicles are the main mobile sources of carbon monoxide (CO) and unburned hydrocarbons (HC) released into the atmosphere. In the last years the increment of the fleet of vehicles in the municipal district of Natal-RN it is contributing to the increase of the emissions of those pollutants. The study consisted of a statistical analysis of the emissions of CO and HC of a composed sample for 384 vehicles with mechanization Gasoline/CNG or Alcohol/Gasoline/CNG of the municipal district of Natal-RN. The tests were accomplished in vehicles submitted to Vehicular Safety's Inspection, in the facilities of INSPETRANS, Organism of Vehicular Inspection. An partial gases analyzer allowed to measure, for each vehicle, the levels of CO and HC in two conditions of rotation of the motor (900 and 2500 rpm). The statistical analysis accomplished through the STATISTICA software revealed a sensitive reduction in the efficiency of the converters catalytic after 6 years of use with emission average it is of 0,78% of CO and 156 (ppm) of HC, Which represents approximately 4 (four) times the amount of CO and the double of HC in comparison with the newest vehicles. The result of a Student s t-test, suggests strongly that the average of the emissions of HC (152 ppm), at 900 rpm, is 40% larger than at 2500 rpm, for the motor without load. This result reveals that the efficiency of the catalytic conversion is limited kinetically in low engine speeds. The Study also ends that when comparing the emissions of CO and HC considering the influence of the fuels, it was verified that although the emissions of CO starting from CNG are 62% smaller than arising from the gasoline, there are not significant differences among the emissions of HC originating from of CNG and of the gasoline. In synthesis, the results place the current criteria of vehicular inspection, for exhaust gases, in doubt, leading the creation of emission limits of pollutant more rigorous, because the efficiency of the converters catalytic is sensibly reduced starting from 6 years of use. It is also raised the possibility of modifications in the test conditions adopted by the current norms, specifically in the speed engine, have seen that in the condition without load the largest emission indexes were registered in slow march. That fact that allows to suggest the dismissal of the tests in high speed engine, reducing the time of inspection in half and generating economy of fuel

Desenvolvimento de nanocompósito (hidroxiapatita/ poliuretano) pela gelação (gelling) de poli ( álcool vinílico) (PVA) para remoção de metais pesados

Removing microcontaminants from effluents is a challenge today, because of its high cost and low efficiency, especially in the treatment of effluents containing heavy metals. An alternative that has emerged is the use of biodegradable nanocomposites, which exhibit good removal and recovery performances, in addition to its low cost. With this in mind, the present study aimed to develop and characterize a nanocomposite based on hydroxyapatite (HAP), polyurethane (PU) and polyvinyl alcohol (PVA) for removing heavy metals. Thus, the research was conducted in several steps: i)- Physico-chemical and microbiological hospital effluent characterization; ii)- Production of hydroxyapatite by aqueous precipitation technique, and their characterization; iii)- Production of the nanocomposite in which the hydroxyapatite was added to the polyurethane prepolymers and then the polyvinyl alcohol/hydroxyapatite film was produced; iv)- Polyvinyl composite without film PU/HAp was also produced in the proportions of 20 and 40% HAp; v)- The composites was characterized by the techniques of XRD, FTIR, SEM / EDS, BET, Zeta Potential and TGA; vi)- The sisal and coconut fibres were washed and dried for comparative tests of adsorption; vii)- Adsorption tests for evaluating the removal of heavy metals (nickel and cadmium). Initial screening adsorption capacity (HAp; PU/HAp - 20 and 40%; PU / HAp / PVA), kinetic studies of adsorption of Cd (II) by HAp; multifactorial design analysis (factorial design) for identifying the most important variables in the adsorption of Cd (II) by composite PU/HAp. Also comparative analysis of adsorption of Cd and Ni by composite PU/HAp were conducted, as well as comparative tests of adsorption of Cd (coconut fibre) and Ni (sisal fibre). It was possible to verify that the composite PU/HAp 40% showed better effectiveness for the removal of Cd (II) and Ni (II), above 80%, equivalent to the lignocellulosic fibre used and HAp produced. As main conclusion, it can be referred that the composite PU/HAp 40% is an effective adsorvent to wastewater treatment for heavy metal removal, with low cost and high efficiency

Estudo do equilíbrio líquido-vapor do sistema água+etanol+líquido iônico visando a separação do álcool anidro

Anhydrous ethanol is used in chemical, pharmaceutical and fuel industries. However, current processes for obtaining it involve high cost, high energy demand and use of toxic and pollutant solvents. This problem occurs due to the formation of an azeotropic mixture of ethanol + water, which does not allow the complete separation by conventional methods such as simple distillation. As an alternative to currently used processes, this study proposes the use of ionic liquids as solvents in extractive distillation. These are organic salts which are liquids at low temperatures (under 373,15 K). They exhibit characteristics such as low volatility (almost zero/ low vapor ), thermal stability and low corrosiveness, which make them interesting for applications such as catalysts and as entrainers. In this work, experimental data for the vapor pressure of pure ethanol and water in the pressure range of 20 to 101 kPa were obtained as well as for vapor-liquid equilibrium (VLE) of the system ethanol + water at atmospheric pressure; and equilibrium data of ethanol + water + 2-HDEAA (2- hydroxydiethanolamine acetate) at strategic points in the diagram. The device used for these experiments was the Fischer ebulliometer, together with density measurements to determine phase compositions. The experimental data were consistent with literature data and presented thermodynamic consistency, thus the methodology was properly validated. The results were favorable, with the increase of ethanol concentration in the vapor phase, but the increase was not shown to be pronounced. The predictive model COSMO-SAC (COnductor-like Screening MOdels Segment Activity Coefficient) proposed by Lin & Sandler (2002) was studied for calculations to predict vapor-liquid equilibrium of systems ethanol + water + ionic liquids at atmospheric pressure. This is an alternative for predicting phase equilibrium, especially for substances of recent interest, such as ionic liquids. This is so because no experimental data nor any parameters of functional groups (as in the UNIFAC method) are needed

Administração experimental de esteróide anabólico androgênico e álcool causa alterações histológicas e morfométricas nos ovários e útero de ratas adultas

Abusive and indiscriminate use of androgenic anabolic steroid is an usual practice among youth and adults of both sex. Usually these substances were utilized simultaneously with others drugs, licit or not, that causes damage to health. The purpose of study was to evaluate the influence of experimental administration of nandrolone decanoate steroid (ND), associated or not to alcohol, in the ovaries and uterus of adult rats. Females with regular estrous cycle (n = 20), were distributed in the groups: a) control (physiological solution); b) ND (7.5 mg/kg BW; intraperitoneal); c) alcohol (0.2 mL/100g BW; oral); d) ND + AL. The teatments were realized by single dose per week, during twelve consecutive weeks. The ovaries of rats in the groups ND, AL and ND + AL presented intense follicular atresia and decrease in the number of antral follicles and corpora lutea. None treatment did affect ovarian weight, but uterine weight was increase (p<0.05) in the ND + AL group. There were alterations in the uterine histology and morphometry at function of each treatment. Isolated or simultaneous use of anabolic steroid and alcohol promotes ovarian and uterine toxicity in adult female rats.

Tipos e consequências da violência sexual sofrida por estudantes do interior paulista na infância e/ou adolescência

Discutem-se os tipos de Violência Sexual (VS) sofridos na infância e/ou adolescência e suas vicissitudes, nas trajetórias sexuais de 236 adolescentes, de ambos os sexos, cursando o Ensino Médio no interior do Oeste Paulista que declararam ter sofrido um ou mais tipos de violência sexual. Dentre esses tipos, destacamos a Violência Doméstica Sexual (VDS), aqui definida como intrafamiliar. Nesse caso, observamos que, dentre os 236 adolescentes com histórico de VDS, 94 (39.8%) declararam ter pensado em suicídio e 39 (16.5%) disseram ter tentado, sendo que 35 (89.7%) deles se declararam heterossexuais (27 [77.1%] do sexo feminino) e 4 não-heterossexuais (3 bissexuais e 1 outro, sendo todos do sexo feminino). A maioria das vítimas finda por relatar o ocorrido aos amigos e responsáveis, mas pouco ou nada é feito, em termos de medidas protetivas a elas.

Aspectos dinâmicos da água versus álcool e acetona por técnicas de congelamento

Water still represents, on its critical properties and phase transitions, a problem of current scientific interest, as a consequence of the countless open questions and of the inadequacy of the existent theoretical models, mainly related to the different solid and liquid phases that this substance possesses. For example, there are 13 known crystalline forms of water, and also amorphous phases. One of them, the amorphous ice of very high density (VHDA), was just recently observed. Other example is the anomalous behavior in the macroscopic density, which presents a maximum at the temperature of 277 K. In order to experimentally investigate the behavior of one of the liquid-solid phase transitions, the anomaly in its density and also the metastability, we used three different cooling techniques and, as comparison systems, we made use of the solvents: acetone and ethyl alcohol. The first studied cooling system employ a Peltier plate, a device recently developed, which makes use of small cubes made up of semiconductors to change heat among two surfaces; the second system is a commercial refrigerator, similar to the residential ones. Finally, the liquid nitrogen technique, which is used to refrigerate the samples in a container, in two ways: a very fast and other one, almost static. In those three systems, three Beckers of aluminum were used (with a volume of 80 ml, each), containing water, alcohol and acetone. They were closed and maintained at atmospheric pressure. Inside of each Becker were installed three thermocouples, disposed along the vertical axis of the Beckers, one close to the inferior surface, other to the medium level and the last one close the superior surface. A system of data acquisition was built via virtual instrumentation using as a central equipment a Data-Acquisition board. The temperature data were collected by the three thermocouples in the three Beckers, simultaneously, in function of freezing time. We will present the behavior of temperature versus freezing time for the three substances. The results show the characterization of the transitions of the liquid

Raciocínio moral e uso abusivo de bebidas alcoólicas por adolescentes

O uso abusivo de álcool por adolescentes é uma questão que preocupa os envolvidos com a educação, uma vez que as consequências desse fato podem gerar sérios prejuízos ao processo ensino-aprendizagem e ao adolescente que abusa. Com o objetivo de contribuir para o debate na busca de uma intervenção efetiva que possa ser utilizada, sobretudo nas escolas, procuramos detectar a possível relação entre uso abusivo de álcool e raciocínio moral. Para tanto, participaram alunos do ensino médio de uma escola pública, selecionados por meio da aplicação do AUDIT (The Alcohol Use Disorder Identification Test), que posteriormente foram entrevistados, conforme a Moral Judgement Interview (MJI) proposta por Kohlberg. Os resultados obtidos revelam níveis e estágios morais aquém dos esperados. Concluímos que a prevenção pode ser pensada por meio da Educação Moral como uma proposta de intervenção efetiva contra o uso abusivo de álcool e outras drogas.

Escolha de parceiros na adolescência

Mate choice is a component of sexual selection. Trying to understand the patterns of this process, several studies have emphasized the adaptive value of sexual differences and their influence on the assessment of the market value. The pattern for adults presented on the scientific literature, which is based on the preference for certain characteristics, shows that men search a partner who shows high value of fecundity and fertility, thus looking for partners with the ability of being pregnant and nursing their offspring. On the other hand, women look for partners with high socioeconomic status, which is strongly associated with the ability to protect and provide resources for them and their offspring. Surprisingly, there is few works that investigated the mate choice patterns during the beginning of the period of sexual differentiation on the morphological, physiological and behavioral traits. The aim of this study was to investigate mate choice patterns in adolescence in order to describe their preferences and contribute to the understanding of human reproductive behavior. Took part of this research 1,232 students from educational institutions of Natal, Brazil, and visitors to the Scientific, Technological and Cultural Fair UFRN. In the Experimental Study 1, we applied a questionnaire to evaluate the importance of certain characteristics, assessed the degree of romantic involvement and real and ideal partners age preference. In the Experimental Study 2, we did a survey of characteristics considered relevant and evaluate the importance of these characteristics in mate choice. The Experimental Study 3 brought an investigation of mate choice patterns based on self-assessment of adolescents, evaluating ideal partner for a short-term and long-term relationships and actual partner. We found that adolescents are motivated to live romantic experiences. We also observed a preference for partners of similar age to that described for adults. Finally, we found similarities and differences in the preferences for characteristics in real and ideal partners in relation to the adult pattern. In addition, we observed high similarity on the self-assessment and assessment of real and ideal partners. We suggest that in the mate choice, adolescents are similar to young adults in some aspects but not all. Our results show the relevance of the reproductive behavior investigation in this human developmental period and reinforce that further studies should contribute to the understanding of human behavior in terms of ontogenetic development and their evolutionary history.

Álcool e comportamento: efeitos na aprendizagem e memória

Excessive alcohol consumption is responsible for many harmful effects on individuals and society. Despite years of research, the mechanisms by which alcohol affects neurological functions and the exact causes of cognitive impairment related to long-term use are unknown. In this sense, this master study proposed to observe how different doses of alcohol affect the addiction response and the learning ability of two fish species: Betta splendens and Danio rerio, the latter a commonly model due to organizational and functional characteristics shared with mammals. For this, different concentrations of ethanol (0%, 0.1%, 0.25%, 1% and 1.5%) were used in acute, chronic and withdrawal treatments. We tested the fish in three experimental protocols: 1) alcohol addiction potential using conditioned place preference, 2) associative conditioning using light as unconditioned stimulus and food as conditioned stimulus and 3) spatial learning using a maze without cues. For the alcohol addiction potential, preference between two different places in a shuttle box was tested before and after alcohol exposure (chronic and acute). In this test, the animals intoxicated by 0.1% did not change behavior, while animals receiving 1% and 1.5% alcohol changed the initial preference to the side where they received alcohol For the associative conditioning, the results show that the groups undergoing low dose (0.1%), both in chronic and withdrawal treatment, learned the task faster than control; groups under 0.25 and 1% alcohol withdrawal learned the task after control; groups chronically intoxicated with these doses did not learn the task. For the spatial learning test, fish submitted to acute and chronic treatments decreased the time to exit the maze; there were significant differences in the animal s performance in a dose-dependent pattern. This difference was not observed for the withdrawal treatment. Given these results, we conclude that the effects of alcohol on learning are dependent on the dosage. Furthermore, low doses of alcohol seem to maximize animal performance on learning tasks and do not alter their seeking behavior, while higher doses induced addition and hinder learning

Maternidade na adolescência: significados e repercussões

From evidence of an existing divergence of opinion among professionals and adolescents using the prenatal and delivery services at a Public Health Unit, aimed to study meanings and consequences of adolescent motherhood among 26 adolescent mothers living in Felipe Camarão, low income district of Natal, capital do Estado do Rio Grande do Norte. Living in a peripheral neighbourhood with a high rate of adolescent mothers in relation to the total new-born, those girls, with offspring among 8 and 12 months age, during interview and focus groups, expressed a different appreciation of their experience than the hegemonic idea among professionals that considers pregnancy and motherhood as unwanted or undesired. With age among 15 and 20 years old, having 53,8% initiated sexual activity before being 15 years old, revealed that the pregnancy was desired in 73,1% of cases, but showing at the same time a social context marked by strong gender oppression and lack of opportunities as consequence of social class deprivation. Life projects, almost always limited to the constitution of a traditional nuclear family, with a purveyor father and care giver mother, appears with very limited possibilities: 46,2% already lived with her partner before becoming pregnant and for 50% of the participants, the birth of the child did not provoke changes in plans and projects. Lack of economical recourses and precarious public services available, together with an idealized maternity role seems to produce extra apprehension among those girls, resulting in frustration and disillusion. As a fact, 92,3% of those adolescents would recommend other adolescent to postpone the maternity project

Álcool e sociabilidade: a farra das adolescentes

The experience as a school psychologist allowed me to notice that expressions like I was like trash in the gang s barbecue , and we chatted away, only the girls, and we all got drunk , are very common in conversations between Elementary and High School students, pointing out to a concerning incidence of alcohol consumption among female adolescents. However, studies about this theme haven t gone deep in the nowadays reality these girls are living in. This study aimed at comprehending the aspects of the relation between girls and alcohol, starting from the point that exaggerated consumption indicates introductory rituals for some groups, making social relations easier and becoming a sociability factor. To give this study some support, a questionnaire was applied to 1028 female teenagers, between 12 and 18 years old, students in private schools in Natal, capital of Rio Grande do Norte. The context chosen for the development of the study - private schools -, arose from the notion that the majority of the data collection carried out about alcohol and other psychotropic drugs aim at public school students. The instrument used was divided in two parts, one that treated about the first contact with alcohol (experimentation), and other that points to the current relation with alcoholic beverages, with 27 closed questions but nevertheless with available space for manifestation like if other; which?, applied collectively in classrooms. The data received a statistic treatment from SPSS and showed that the first contact with alcoholic beverage happens in domestic environment, having parents and friends as companions, very precociously, around 10 years of age, as curiosity. At this moment, Ice drink is the most consumed beverage. The main reason that leads them to drink is to pass the time in parties, and they don t drink alone (93% of students researched), what gives alcohol this recreational and socializing characteristic. They do consider alcohol a kind of drug, but are not afraid of getting addicted. People that drink usually show to be extroverted, they get happier (40,3%) and are not shy at all (29,4%), have attitudes of moral character, like to get involved with unknown boys (18,5%), get numb (9,9%), or get sad (1,9%). They label as vulgar the girls that drink, depending on the amount, and to be stimulated by the boys to drink. The study shows that systematic interventions of the school are necessary, once it is an institution that should care about education and personality traits of children and adolescents, as well as the important role of the psychologist in this context. Besides, it claims the society to get effectively involved with the public policies that already exist

Relação amorosa e tentativa de suicídio na adolescência : uma questão de (des)amor

Suicide rates have been rising all over the world. In Rio Grande do Norte state, a study carried out by Dutra (1999) investigated suicide rates among youngsters and found that in 1997 alone 244 cases of suicide attempt were registered. The author took an interest in studying this phenomenon among adolescents after reviewing Dutra s study and the technical literature on suicide. In addition to that, another topic caught her attention and raised new research questions: suicide attempts motivated by love, i.e., the end of a relationship, the fantasy of being abandoned by a partner. These have made the author to question how love manifested itself among adolescents and how it could become a reason for adolescents to give up their lives. Based on the data she analyzed and the research questions she developed, her research objective was to understand how adolescents who have attempted suicide because of love-related reasons have gone through this experience. The theoretical reference for the research was the Client-centered Therapy and more specifically, the construct self , according to Carl Rogers. The methodological strategy was inspired by the existential-phenomenological strategy. It used the narrative as a research instrument, inspired by the work of Walter Benjamim (1994) which was developed into a research strategy by Schmidt (1990). Four youngsters (three male and one female) have participated in this study. They have attempted suicide for love-related reasons during dolescence, when they were 12 to 18 years old. The interviews were recorded on cassette tapes, transcribed and literalized into narratives. The understanding of the narratives was based on the meanings that emerged from the youngsters speeches, as well as from the moments that touched the author. These moments highlighted the meaning of the experience of giving up life and the experience of love-based relationship as experienced by the youngsters. The study detected, among the adolescents who were interviewed, the existence of impulsiveness related to the suicide attempt. Also, the majority of the interviewees came from unstructured family backgrounds and had lost of one of their parents or had to face their parents divorce. The suicide was attempted by these youngsters through the ingestion of medicines. The research also revealed that the youngsters had regretted attempting suicide and felt guilty about it. With regards to their self-evaluation, the author observed that the youngsters had low self-esteem, negative perceptions about themselves and distorted views of themselves. These findings helped the author to reflect on the close relationship between the construct self and the suicide attempt. She also observed that a few factors, i.e., family context, education, social and cultural values, have influenced the way the youngsters perceived themselves . The results of this research confirm the idea that we have to understand the suicide attempt as a multi-determined phenomenon. This study contributed to the analysis and reflection on the factors that contribute to suicide attempts thus providing a foundation for the development of public health programs and policies to deal with this topic

Adolescência e ato infracional: a família em conflito

Numerous studies discuss the issue of adolescent in conflict with the law from the adolescent that committed infraction or from his perceptions. Taking into account the importance of the family in the life of all subject in development, this study sought the look of the families about the infraction of their adolescents under socio-educative measures. For this purpose, semi-open interviews were conducted with 20 families, ten of the boys and equal number of the girls. The institutions where the measures are applied in Natal / RN gave space for most family members to be interviewed. The data collected were arranged in tables and analyzed qualitatively following the socio-historical perspective. The survey revealed that the meanings attributed to the time of conflict with the law of the adolescents differ between the boys families and the girls . Most of the boys families see the infraction as a consequence of the influence of bad company, as a minor provocative of changes in the family s relations, left justified in a context marked by violence. Now for most part of the girls families, the infraction is seen as their responsibility, as generator of transformations within the family both emotional and economic , and inaugurates a search movement for conflicts resolutions. Through the testimonies of these families, it became evident that there was a family reality structured also by a conflicting social, economic and community context. Thus, before there is an infraction that demarcates the conflict in adolescence, there is a family in conflict.