996 resultados para Continuous-culture


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”METKU –projektissa” (Merenkulun turvallisuuskulttuurin kehittäminen) tutkitaan kansainvälisen turvallisuusjohtamiskoodin (ISM-koodin) vaikutuksia merenkulun turvallisuuteen ja etsitään kehittämiskohteita merenkulun turvallisuusjohtamisen parantamiseksi. Tämä haastatteluraportti on laadittu METKU –projektin yhteistyössä työpakettien 1 ja 2 kesken. Tähän raporttiin haastateltiin yhteensä 94 merenkulun ammattilaista. Suurimman osan haastateltavista muodostivat aktiiviset merenkulkijat: miehistön jäsenet, päällystö ja alusten päälliköt. Haastattelukohteena oli seitsemän suomalaista varustamoa. Haastatteluissa kerättiin merenkulkijoiden kokemuksia ja mielipiteitä ISM-koodin vaikutuksesta heidän käytännön työhönsä. Suomalaiset merenkulkijat uskovat, että tänä päivänä varustamoiden johtajat ovat hyvin sitoutuneita turvallisuuteen. Myös miehistön asenteet turvallisuuteen ovat ISM-koodin käytön myötä parantuneet. Haasteltavien yhteinen huoli kohdistui jatkuvan parantamisen toimivuuteen. Kaikki haastatellut ryhmät olivat samaa mieltä siitä, että poikkeamien raportointi ei ISMkoodin vaatimuksesta huolimatta toimi kunnolla. ISM-koodin käyttöön otosta on ollut merenkululle selkeää hyötyä. Haastateltavat esittivät hyötyinä parantuneen yhteistyön ja tiedonkulun alusten ja varustamon välillä sekä sen, että merenkulun toiminnan laatu on parantunut. Monet haastateltavat korostivat, että ISM-koodin selkeät turvallisuusvastuut yhtiölle on ollut merkittävä hyöty. Itse ISM-koodiin merenkulkijoilla ei ollut juurikaan huomauttamista. Sen sijaan turvallisuusjohtamisen käytännön toteutuksessa nähtiin parantamisen varaa. ISMkoodin aiheuttamina ongelmina mainittiin mm. lisääntynyt byrokratia ja liian monimutkaiset ja yksityiskohtaiset turvallisuuskäsikirjat. Monet haastateltavat toivovat, että ISM-koodin käytännön soveltamiseen laadittaisiin ohjeita.

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Future clinical applications of human embryonic stem (hES) cells will require high-yield culture protocols. Currently, hES cells are mainly cultured in static tissue plates, which offer a limited surface and require repeated sub-culturing. Here we describe a stirred system with commercial dextran-based microcarriers coated with denatured collagen to scale-up hES cell production. Maintenance of pluripotency in the microcarrier-based stirred system was shown by immunocytochemical and flow cytometry analyses for pluripotency-associated markers. The formation of cavitated embryoid bodies expressing markers of endoderm, ectoderm and mesoderm was further evidence of maintenance of differentiation capability. Cell yield per volume of medium spent was more than 2-fold higher than in static plates, resulting in a significant decrease in cultivation costs. A total of 10(8) karyotypically stable hES cells were obtained from a unitary small vessel that needed virtually no manipulation during cell proliferation, decreasing risks of contamination. Spinner flasks are available up to working volumes in the range of several liters. If desired, samples from the homogenous suspension can be withdrawn to allow process validation needed in the last expansion steps prior to transplantation. Especially when thinking about clinical trials involving from dozens to hundreds of patients, the use of a small number of larger spinners instead of hundreds of plates or flasks will be beneficial. To our knowledge, this is the first description of successful scale-up of feeder- and Matrigel™-free production of undifferentiated hES cells under continuous agitation, which makes this system a promising alternative for both therapy and research needs.

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La formation à distance (FAD) est de plus en plus utilisée dans le cadre de la formation des enseignants aux technologies de l’information et de la communication (TIC). Dans les pays en voie de développement, elle permet non seulement de réduire les coûts par rapport à une formation traditionnelle, mais aussi de modéliser des pratiques pédagogiques exemplaires qui permettent de maximiser le recours aux TIC. En ce sens, la formation continue des enseignants aux TIC par des cours à distance qui intègrent des forums de discussion offre plusieurs avantages pour ces pays. L’évaluation des apprentissages réalisés dans les forums reste cependant un problème complexe. Différents modèles et différentes procédures d’évaluation ont été proposés par la littérature, mais aucun n’a encore abordé spécifiquement la culture e-learning des participants telle qu’elle est définie par le modèle IntersTICES (Viens, 2007 ; Viens et Peraya, 2005). L’objectif de notre recherche est l’élaboration d’une grille opérationnelle pour l’analyse de la culture e-learning à partir des contenus de différents forums de discussion utilisés comme activité de formation dans un cours à distance. Pour développer cette grille, nous utiliserons une combinaison de modèles recensés dans la revue de littérature afin de circonscrire les principaux concepts et indicateurs à prendre en compte pour ensuite suivre les procédures relatives à l’analyse de la valeur, une méthodologie qui appelle la production d’un cahier des charges fonctionnel, la production de l’outil, puis sa mise à l’essai auprès d’experts. Cette procédure nous a permis de mettre sur pied une grille optimale, opérationnelle et appuyée par une base théorique et méthodologique solide.

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Une préoccupation grandissante face aux risques biologiques reliés aux maladies infectieuses est palpable tant au niveau international que national ou provincial. Des maladies émergentes telles que le SRAS ou la grippe A/H1N1 ont amené une prise en charge des risques pandémiques et à l’élaboration de mesures d’urgence pour maîtriser ces risques : développer une culture de sécurité est devenu une priorité de recherche de l’OMS. Malgré tout, peu d’écrits existent face à cette volonté de sécuriser la santé et le bien-être par toute une série de dispositifs au sein desquels les discours occupent une place importante en matière de culture de sécurité face aux risques biologiques. Une réflexion sociopolitique était nécessaire pour les infirmières qui sont aux premières loges en dispensant des soins à la population dans une perspective de prévention et de contrôle des infections (PCI) dans laquelle elles se spécialisent. Dès lors, ce projet avait pour buts d’explorer la perception du risque et de la sécurité face aux maladies infectieuses auprès des infirmières cliniciennes et gestionnaires québécoises; d’explorer plus spécifiquement l'existence ou l'absence de culture de sécurité dans un centre de santé et de services sociaux québécois (CSSS); et d’explorer les discours en présence dans le CSSS en matière de sécurité et de risques biologiques face aux maladies infectieuses et comment ces discours de sécurité face aux risques biologiques se traduisent dans le quotidien des infirmières. Les risques biologiques sont perçus comme identifiables, mesurables et évitables dans la mesure où les infirmières appliquent les mesures de préventions et contrôle des infections, ce qui s’inscrit dans une perspective positiviste du risque (Lupton, 1999). La gestion de ces risques se décline au travers de rituels de purification et de protection afin de se protéger de toute maladie infectieuse. Face à ces risques, une culture de sécurité unique est en émergence dans le CSSS dans une perspective de prévention de la maladie. Toutefois, cette culture de sécurité désirée est confrontée à une mosaïque de cultures qui couvrent différentes façons d’appliquer ou non les mesures de PCI selon les participants. La contribution de cette recherche est pertinente dans ce nouveau domaine de spécialité que constituent la prévention et le contrôle des infections pour les infirmières québécoises. Une analyse critique des relations de pouvoir tel qu’entendu par Foucault a permis de soulever les questions de surveillance infirmière, de politique de l’aveu valorisée, de punition de tout écart à l’application rigoureuse des normes de PCI, de contrôle de la part des cadres infirmiers et d’assujettissement des corps relevant des mécanismes disciplinaires. Elle a permis également de documenter la présence de dispositifs de sécurité en lien avec la tenue de statistiques sur les patients qui sont répertoriés en tant que cas infectieux, mais également en termes de circulation des personnes au sein de l’établissement. La présence d’un pouvoir pastoral est perceptible dans la traduction du rôle d’infirmière gestionnaire qui doit s’assurer que ses équipes agissent de la bonne façon et appliquent les normes de PCI privilégiées au sein du CSSS afin de réguler les taux d’infections nosocomiales présents dans l’établissement. En cas de non-respect des mesures de PCI touchant à l’hygiène des mains ou à la vaccination, l’infirmière s’expose à des mesures disciplinaires passant de l’avertissement, la relocalisation, l’exclusion ou la suspension de l’emploi. Une culture du blâme a été décrite par la recherche d’un coupable au sein de l’institution, particulièrement en temps de pandémie. Au CSSS, l’Autre est perçu comme étant à l’origine de la contamination, tandis que le Soi est perçu comme à l’abri de tout risque à partir du moment où l’infirmière respecte les normes d’hygiène de vie en termes de saines habitudes alimentaires et d’activité physique. Par ailleurs, les infirmières se doivent de respecter des normes de PCI qu’elles connaissent peu, puisque les participantes à la recherche ont souligné le manque de formation académique et continue quant aux maladies infectieuses, aux risques biologiques et à la culture de sécurité qu’elles considèrent pourtant comme des sujets priorisés par leur établissement de santé. Le pouvoir produit des effets sur les corps en les modifiant. Cette étude ethnographique critique a permis de soulever les enjeux sociopolitiques reliés aux discours en présence et de mettre en lumière ce que Foucault a appelé le gouvernement des corps et ses effets qui se capillarisent dans le quotidien des infirmières. Des recherches ultérieures sont nécessaires afin d’approfondir ce champ de spécialité de notre discipline infirmière et de mieux arrimer la formation académique et continue aux réalités infectieuses cliniques.

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Unveiling the molecular and regulatory mechanisms that prevent in vitro transformation in shrimp remains elusive in the development of continuous cell lines, with an arduous history of over 25 years (Jayesh et al., 2012). Despite presenting challenges to researchers in developing a cell line, the billion dollar aquaculture industry is under viral threat. In addition, the regulatory mechanisms that prevent in vitro transformation and carcinoma in shrimps might provide new leads for the development of anti-ageing and anti-cancer interventions in human (Vogt, 2011) and in higher vertebrates. This highlights the importance of developing shrimp cell lines, to bring out effective prophylactics against shrimp viruses and for understanding the mechanism that induce cancer and ageing in human.. Advances in molecular biology and various gene transfer technologies for immortalization of cells have resulted in the development of hundreds of cell lines from insects and mammals, but yet not a single cell line has been developed from shrimp and other marine invertebrates. With this backdrop, the research described in this thesis attempted to develop molecular tools for induced in vitro transformation in lymphoid cells from Penaeus monodon and for the development of continuous cell lines using conventional and novel technologies to address the problems at cellular and molecular level.

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The basic idea behind improving local food security consists of two paths; first, accessibility (price, stock) and second, availability (quantity and biodiversity); both are perquisites to the provision of nutrients and a continuous food supply with locally available resources. The objectives of this thesis are to investigate if indigenous knowledge still plays an important role in traditional farming in the Minangkabau`s culture, thus supporting local food security. If the indigenous knowledge still plays a role in food culture in the Minangkabau`s culture which is linked to the matrilineal role and leads to a sound nutrition. Further, it should be tested if marantau influences traditional farming and food culture in Minangkabau`s, and if the local government plays a role in changing of traditional farming systems and food culture. Furthermore this thesis wants to prove if education and gender are playing a role in changing traditional farming system and food culture, and if the mass media affects traditional farming systems and food culture for the Minangkabau. The study was completed at four locations in West Sumatera; Nagari Ulakan (NU) (coastal area), Nagari Aia Batumbuak (NAB) (hilly area), Nagari Padang Laweh Malalo (NPLM) (lake area), Nagari Pandai Sikek (NPS) (hilly area). The rainfall ranged from 1400- 4800 mm annually with fertile soils. Data was collected by using PRA (Participatory Rural Appraisal) to investigate indigenous knowledge (IK) and its interactions, which is also combining with in depth-interview, life history, a survey using semi-structured-questionnaire, pictures, mapping, and expert interview. The data was collected from June - September 2009 and June 2010. The materials are; map of area, list of names, questionnaires, voices recorder, note book, and digital camera. The sampling method was snowball sampling which resulted in the qualitative and quantitative data taken. For qualitative data, ethnography and life history was used. For quantitative, a statistical survey with a semi-structured questionnaire was used. 50 respondents per each site participated voluntarily. Data was analyzed by performing MAXQDA 10, and F4 audio analysis software (created and developed by Philip-University Marburg). The data is clustered based on causality. The results show that; the role of IK on TFS (traditional farming system) shown on NPLM which has higher food crop biodiversity in comparison to the other three places even though it has relatively similar temperature and rainfall. This high food crop biodiversity is due to the awareness of local people who realized that they lived in unfavourable climate and topography; therefore they are more prepared for any changes that may occur. Carbohydrate intake is 100 % through rice even though they are growing different staple crops. Whereas most of the people said in the interviews that not eating rice is like not really eating for them. In addition to that, mothers still play an important role in kitchen activities. But when the agriculture income is low, mothers have to decide whether to change the meals or to feel insecure about their food supply. Marantau yields positive impact through the remittances it provides to invest on the farm. On the other hand, it results in fewer workers for agriculture, and therefore a negative impact on the transfer of IK. The investigation showed that the local government has a PTS (Padi Tanam Sabatang) programme which still does not guarantee that the farmers are getting sufficient revenue from their land. The low agricultural income leads to situation of potential food insecurity. It is evident that education is equal among men and women, but in some cases women tend to leave school earlier because of arranged marriages or the distances of school from their homes. Men predominantly work in agriculture and fishing, while women work in the kitchen. In NAB, even though women work on farmland they earn less then men. Weaving (NPS) and kitchen activity is recognized as women’s work, which also supports the household income. Mass media is not yielding any changes in TFS and food culture in these days. The traditional farming system has changed because of intensive agricultural extension which has introduced new methods of agriculture for the last three decades (since the 1980’s). There is no evidence that they want to change any of their food habits because of the mass media despite the lapau activity which allows them to get more food choices, instead preparing traditional meal at home. The recommendations of this thesis are: 1) The empowerment of farmers. It is regarding the self sufficient supply of manure, cooperative seed, and sustainable farm management. Farmers should know – where are they in their state of knowledge – so they can use their local wisdom and still collaborate with new sources of knowledge. Farmers should learn the prognosis of supply and demand next prior to harvest. There is a need for farm management guidelines; that can be adopted from both their local wisdom and modern knowledge. 2) Increase of non-agricultural income Increasing the non-agricultural income is strongly recommended. The remittances can be invested on non-agricultural jobs. 3) The empowerment of the mother. The mother plays an important role in farm to fork activities; the mother can be an initiator and promoter of cultivating spices in the backyard. Improvement of nutritional knowledge through information and informal public education can be done through arisan ibu-ibu and lapau activity. The challenges to apply these recommendations are: 1) The gap between institutions and organizations of local governments. There is more than one institution involved in food security policy. 2) Training and facilities for field extension agriculture (FEA) is needed because the rapid change of interaction between local government and farmer’s dependent on this agency.

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This article intends to show the relationships between quality practices and the process of organizational learning. When we look at the literature about programs of continuous improvement we see that theoreticians consider that the process of organizational learning is a superior stage in the quality culture adopted by companies. To investigate this possibility, we put together a series of indicators taken from classic authors who have written about organizational learning. Adopting a multiple methodology, we applied these indicators to two plants belonging to the Nestlé food product company which have introduced continuous improvement programs over the last two years.

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Transient and continuous recombinant protein expression by HEK cells was evaluated in a perfused monolithic bioreactor. Highly porous synthetic cryogel scaffolds (10ml bed volume) were characterised by scanning electron microscopy and tested as cell substrates. Efficient seeding was achieved (94% inoculum retained, with 91-95% viability). Metabolite monitoring indicated continuous cell growth, and endpoint cell density was estimated by genomic DNA quantification to be 5.2x108, 1.1x109 and 3.5x1010 at day 10, 14 and 18. Culture of stably transfected cells allowed continuous production of the Drosophila cytokine Spätzle by the bioreactor at the same rate as in monolayer culture (total 1.2 mg at d18) and this protein was active. In transient transfection experiments more protein was produced per cell compared with monolayer culture. Confocal microscopy confirmed homogenous GFP expression after transient transfection within the bioreactor. Monolithic bioreactors are thus shown to be a flexible and powerful tool for manufacturing recombinant proteins.

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O estudo foi efetuado durante o período de chuva (dezembro-fevereiro) em seis viveiros de produção semi-intensiva de peixes, a fim de avaliar o efeito da chuva na qualidade da água de viveiros que apresentam fluxo contínuo de água, a qual é passada de um viveiro para outro sem tratamento prévio. Foram amostrados oito pontos de coleta nas saídas dos viveiros. O viveiro P1 (próximo à nascente) apresentou as menores concentrações físicas e químicas da água e as maiores no viveiro P4 (considerado um ponto crítico recebendo material alóctone proveniente de outros viveiros e do escoamento do setor de criação de rãs). A disposição seqüencial dos viveiros estudados promoveu aumento nas concentrações dos nutrientes, clorofila-a e condutividade. As chuvas características desta época do ano aumentaram o fluxo de água nos viveiros e conseqüentemente, carreando material particulado e dissolvido de um viveiro para outro e, promovendo um aumento das variáveis limnológicas em direção do P3 ao P6. Os resultados sugerem que a chuva no período de estudo afetou positivamente a qualidade da água dos viveiros estudados, porém, como os sistemas analisados estão dispostos em distribuição seqüencial e escoamento constante da água de viveiros e tanques paralelos sem tratamento prévio, cuidados devem ser averiguados para que o aumento do fluxo de água provocado pelas chuvas não tenha efeito adverso nos viveiros estudados.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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The objective of this work was to evaluate the total and thermotolerant coliform densities in the oyster culture water of Cananeia, SP, Brazil, correlating these densities with environmental variables and tidal variations. Superficial water samples were collected in two tide conditions (spring and neap) from three areas of Cananéia municipality (Mandira, Itapitangui and Cooperostra). The three studied areas showed good conditions for the culture regarding coliform densities. The two tidal conditions differed significantly as to total coliform concentration; however, the same procedure was not performed for thermotolerant coliforms. No correlation was observed between water temperature, pH, and concentrations of total and thermotolerant coliforms. Coliform density was positively correlated with rainfall and negatively correlated with salinity. Spring and neap tides differed significantly as to coliform number. Simple diagnosis of environmental conditions of the crop fields is insufficient to assess water quality of shellfish cultivation. A continuous monitoring program of planted areas is necessary both for the assessment of water quality potential for marine culture and for ensuring safe consumption of seafood, besides constituting an important tool to understand the relationships between contamination and the involved environmental variables.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Rapid in vitro methods for measuring digestibility may be useful in analysing aqua feeds if the extent and limits of their application are clearly defined. The pH-stat protein digestibility routine with shrimp hepatopancreas enzymes was previously related to apparent protein digestibility with juvenile Litopenaeus vannamei fed diets containing different protein ingredients. The potential of the method to predict culture performance of shrimp fed six commercial feeds (T3, T4, T5, T6, T7 and T8) with 350 g kg(-1) declared crude-protein content was assessed. The consistency of results obtained using hepatopancreas enzyme extracts from either pond or clear water-raised shrimp was further verified in terms of reproducibility and possible diet history effects upon in vitro outputs. Shrimps were previously acclimated and then maintained over 56 days (initial mean weight 3.28 g) on each diet in 500-L tanks at 114 ind m(-2), clear water closed system with continuous renewal and mechanical filtering (50 mu m), with four replicates per treatment. Feeds were offered four times daily (six days a week) delivered in trays at feeding rates ranging from 4.0% to 7.0% of stocked shrimp biomass. Feed was accessible to shrimp 4 h daily for 1-h feeding period after which uneaten feed was recovered. Growth and survival were determined every 14 days from a sample of 16 individuals per tank. Water quality was monitored daily (pH, temperature and salinity) and managed by water back flushing filter cleaning every 7-10 days. Feeds were analysed for crude protein, gross energy, amino acids and pepsin digestibility. In vitro pH-stat degree of protein hydrolysis (DH%) was determined for each feed using hepatopancreas enzyme extracts from experimental (clear water) or pond-raised shrimp. Feeds resulted in significant differences in shrimp performance (P < 0.05) as seen by the differences in growth rates (0.56-0.98 g week(-1)), final weight and feed conversion ratio (FCR). Shrimp performance and in vitro DH% with pond-raised shrimp enzymes showed significant correlation (P < 0.05) for yield (R-2 = 0.72), growth rates (R-2 = 0.72-0.80) and FCR (R-2 = -0.67). Other feed attributes (protein : energy ratio, amino acids, true protein, non-protein nitrogen contents and in vitro pepsin digestibility) showed none or limited correlation with shrimp culture performance. Additional correlations were found between growth rates and methionine (R-2 = 0.73), FCR and histidine (R-2 = -0.60), and DH% and methionine or methionine+cystine feed contents (R-2 = 0.67-0.92). pH-stat assays with shrimp enzymes generated reproducible DH% results with either pond (CV <= 6.5%) or clear water (CV <= 8.5%) hepatopancreas enzyme sources. Moreover, correlations between shrimp growth rates and feed DH% were significant regardless of the enzyme origin (pond or clear water-raised shrimp) and showed consistent R-2 values. Results suggest the feasibility of using standardized hepatopancreas enzyme extracts for in vitro protein digestibility.

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The purpose of the first part of the research activity was to develop an aerobic cometabolic process in packed bed reactors (PBR) to treat real groundwater contaminated by trichloroethylene (TCE) and 1,1,2,2-tetrachloroethane (TeCA). In an initial screening conducted in batch bioreactors, different groundwater samples from 5 wells of the contaminated site were fed with 5 growth substrates. The work led to the selection of butane as the best growth substrate, and to the development and characterization from the site’s indigenous biomass of a suspended-cell consortium capable to degrade TCE with a 90 % mineralization of the organic chlorine. A kinetic study conducted in batch and continuous flow PBRs and led to the identification of the best carrier. A kinetic study of butane and TCE biodegradation indicated that the attached-cell consortium is characterized by a lower TCE specific degredation rates and by a lower level of mutual butane-TCE inhibition. A 31 L bioreactor was designed and set up for upscaling the experiment. The second part of the research focused on the biodegradation of 4 polymers, with and with-out chemical pre-treatments: linear low density polyethylene (LLDPE), polyethylene (PP), polystyrene (PS) and polyvinyl chloride (PVC). Initially, the 4 polymers were subjected to different chemical pre-treatments: ozonation and UV/ozonation, in gaseous and aqueous phase. It was found that, for LLDPE and PP, the coupling UV and ozone in gas phase is the most effective way to oxidize the polymers and to generate carbonyl groups on the polymer surface. In further tests, the effect of chemical pretreatment on polyner biodegrability was studied. Gas-phase ozonated and virgin polymers were incubated aerobically with: (a) a pure strain, (b) a mixed culture of bacteria; and (c) a fungal culture, together with saccharose as a co-substrate.

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This dissertation deals with the translations of seven books for children written by the Chicano author Pat Mora. I started to be interested in the Chicano world, a world suspended between Mexico and the United States, after reading a book by Sandra Cisneros. I decided to deepen my curiosity and for this reason, I discovered a hybrid reality full of history, culture and traditions. In this context, the language used is characterized by a continuous code switching between Spanish and English and I thought it was an interesting phenomenon from the literary and translation point of view. During my research in the Chicano culture, I ran across Pat Mora. Her books for children fascinated me because of their actual themes (the cultural diversity and the defense of identity) and their beautiful illustrations. For this reason, I chose to translate seven of her books because I believe they could be an enrichment for children literature in Italy. The work consists of five chapters. The first one deals with the identity of Chicano people, their history, their literature and their language. In the second chapter, I outline Pat Mora’s profile. I talk about her biography and I analyze her most famous works. In the third chapter, I introduce the seven books for children to be translated and I point out their plots and main themes. In the fourth chapter, I present the translation of the books. The fifth chapter is the translation comment. I deal with the linguistic analysis of the source texts and the analysis of the target texts focusing on the choices made during the translation process.