abstract: Nighttime visibility of pavement markings is provided by glass beads embedded into the striping surface. The glass beads take light from the vehicle headlamps and reflect it back to the driver. This phenomenon is known as retroreflection. Literature suggests that the amount of the bead embedded into the striping surface has a profound impact on the intensity of the retroreflected light. In order to gain insight into how the glass beads provide retroreflection, an experiment was carried out to produce paint stripes with glass beads and measure the retroreflection. Samples were created at various application rates and embedment depths, in an attempt to verify the optimal embedment and observe the effect of application rate on retroreflection. The experiment was conducted using large, airport quality beads and small, road quality beads. Image analysis was used to calculate the degree to which beads were embedded and in an attempt to quantify bead distribution on the stripe surface. The results from the large beads showed that retroreflection was maximized when the beads were embedded approximately seventy percent by bead volume. The results also showed that as the application rate increased, the retroreflection increased, up to a point and then decreased. A model was developed to estimate the retroreflectivity given the amount of beads, bead spacing, and distribution of bead embedment. Results from the small beads were less conclusive, but did demonstrate that the larger beads are better at providing retroreflection. Avenues for future work in this area were identified as the experiment was conducted. / Dissertation/Thesis / M.S. Civil Engineering 2014

Rapporten skrevsför ett projekt från robotgräsklipparavdelningen på Husqvarna AB.Deras nya produkt Husqvarna CEORA har tagits fram för större professionella anläggningar, som till exempel golfbanor och fotbollsplaner.Dessa anläggningar användes sig ofta avlawnstriping, en metod för att skapa mönster i gräsmattan genom att vända gräseti olika riktningar. För att kunna konkurrera med befintliga grönskötselprodukter som finns på marknaden var ett automatiseratlawnstriper-tillbehör av intresse för företaget. Projektets syfte blev därför att ta fram en prototyp som bidrar till att arrangera gräset i specifika riktningar, som kan höjas och sänkas automatiskt samt kunna vara fixerad i höjdled vid behov. Funktionen ska inte påverkas av förändringar i höjdled och produkten ska kunna monteras och demonteras påCEORA av slutkund.I det teoretiska ramverket tas olika relevanta teorier upp. Teori om hurlawnstripinggörs och dess effekt, information om Husqvarna CEORA, teori om olika fästanordningar som finns påmarknaden samt teori om kraftomvandling och rörelse diskuteras. Dessa teorier ligger till grund för de beslut som sedan tas i arbetet.I projektet användsleanproduktutveckling, då det passar ett projekt som involverar produktutveckling och konstruktion. De fem huvudområdena i processen ärplanering och strategi, förstudie, produktframtagning, utvärdering och konceptval, och slutligen prototypframtagning. I metodavsnittet beskrivs metoderna som ingår i dessa kategorier.I genomförandekapitlet används produktutvecklingsmetoder för att ta fram prototyperna.Krav och begränsningar togs fram tillsammans med Husqvarna AB.För att få ytterligare information om de intressenter som kan tänkas använda produkten intervjuades en representant från Jönköpings Golfklubb.Intervjun kompletterades med en studie omlawnstripingsom gjorts av Ingarö Golfklubb. Utifrån detta och konkurrentanalysen framkom att majoriteten av befintliga lösningar består av antingen integrerade rullar eller borstar.Olika koncept gjordes, som ledde fram till tre slutkoncept.De tre slutkoncepten består av engummiskrapa som kan höjas och sänkas med en linjärmotor. Linjärmotornär fäst på en stålkonstruktion som ansluts till CEORAS fästplåt.Skrapan och linjärmotorn stabiliseras med hjälp av tvåstavar. Prototyperna har två frihetsgrader för pivotering, för att möjliggöra bästa möjliga följsamhet med marken. De trekoncepten har vissa individuella skillnader, främst det tredje konceptet som har två skrapor. Efter att ha genomgått en beslutsmatrisvaldes två av koncepten ut för vidareutveckling av Husqvarna. SLS-prototyper tillverkadesför att utvärdera rörlighetenhos de två slutkonceptenEnkel och Dubbel. Prototypen uppfyllde alla krav på pivotering och rörlighet i höjdled. / The report was written for a project withthe robotic lawnmower department at Husqvarna AB. Their new product Husqvarna CEORA has been developed for larger professional facilities, such as golf courses and football pitches. These facilitiesoften uselawn striping, a method for creating patterns in the lawn by turning the grassin various directions.In order tocompetewith existinglawncare products available on the market, an automated lawn striper accessory was of interest to the company. The purpose of thisproject was therefore to develop a prototype that helps to arrange the grass in specific directions, which can be raised and lowered automatically and be fixed in height if necessary. The function must not be affected by changes in height and the product must be able to be mounted and dismounted on CEORA by the end customer.In the theoretical framework, variousrelevant theories are addressed. Theory on how lawn striping is done and its effect, information on Husqvarna CEORA, theory on various fastening devices available on the market and theory on power conversion and movement are discussed. These theories formthe basis for the decisions that are then made in the work.The project uses lean product development, as it fits a project that involves product development and design. The five main areas in the process are planning and strategy, feasibility study, product development, evaluation and concept selection, and finally prototype development. The methods section describes the methods that are included in these categories.The implementation chapter uses product development methods to produce the prototypes. Requirements and restrictions were developed together with Husqvarna AB. To get further information about the stakeholders who may use the product, a representative from Jönköping Golf Club was interviewed. The interview was supplemented with a study on lawn striping done byIngaröGolf Club. Based on this and the competition analysis, it emerged thatmostexisting solutions consist of either integrated rollers or brushes. Different concepts were made, which led to three final concepts.The three final concepts consist of a rubber scraper that can be raised and lowered with a linear motor. The linear motor is attached to a steel structure which is connected to CEORAS mounting plate. The scraper and linear motor are stabilized by means of twobrackets. The prototypes have two degrees of freedom for pivoting, to enable the best possible compliance with the ground. The three concepts have some individual differences, mainly the third concept which has two scrapers. After undergoing a decision matrix, two of theconcepts were selected for further development by Husqvarna. SLS prototypes were manufactured to evaluate the mobilityof the two final concepts,Enkel and Dubbel. The prototype met all the requirements for pivoting and height mobility.

Foram conduzidos dois experimentos para avaliar a prevalência e severidade das lesões de white striping (WS) e wooden breast (WB) em peitos de frangos alimentados com níveis crescentes de lisina digestível (Lis dig.) de 12 a 28 dias (Exp. 1) e de 28 a 42 dias (Exp. 2).Os testes foram conduzidos utilizando machos Cobb x Cobb 500 de empenamento lento com 1 dia de idade, ambos com 6 tratamentos e 8 repetições cada. O aumento da Lis dig. foi igualmente espaçado de 0,77 a 1,17% no Exp. 1 e de 0,68 a 1,07% no Exp. 2. A dieta com nível mais baixo de Lis dig. não foi suplementada com L-Lisina no experimentos e todos os outros aminoácidos (AA) essenciais estão de acordo ou excedem em até 5% as recomendações comerciais, a fim de não limitar o crescimento das aves. Foram selecionadas aleatóriamente quatro aves por repetição e processadas aos 35 e 42 dias nos Exp. 1 e 2, respectivamente. Os peitos desossados foram submetidos a avaliação de 3 pessoas para detectar a presença de WS e WB assim como fornecer os escores de WS (0-normal, 1-moderao, 2-severo) e WB (0-normal, 1-moderado leve, 2-moderado, 3-severo). O aumento da Lis dig. apresentou efeito positivo no peso vivo, peso da carcaça e peito bem como no rendimento de peito. A prevalência de WS e WB foi 32,3 e 85,9% no Exp. 1 e 87,1 e 89,1% no Exp. 2. Aves submetidas a dieta sem suplementação de Lis apresentaram os menores escores médios de WS e WB (0,22 e 0,78 no Exp. 1 e 0,61 e 068 no Exp. 2). Respostas lineares foram obtidas através das variáveis de desempenho para WS e WB no Exp. 1, enquanto que a resposta para as variáveis no Exp. 2 foram quadráticas. O aumento dos níveis de Lis melhora o desempenho zootécnico e as caracteristicas das carcaças, além de induzir a ocorrência e severidade das lesões de WS e WB, devido, provavelmente, aos níveis de Lis que maximizam o potencial genético para crescimento e rendimento de peito. / Two experiments were conducted to evaluate the prevalence and severity of white striping (WS) and wooden breast (WB) in breast fillets from broilers fed diets with increasing digestible lysine (dig. Lys) from 12 to 28 d (Exp. 1) and from 28 to 42 d (Exp. 2). Trials were sequentially conducted using 1-d-old slow feathering Cobb × Cobb 500 male broilers, both with 6 treatments and 8 replicates each. Increasing dig. Lys levels were equally spaced from 0.77 to 1.17% in Exp. 1 and from 0.68 to 1.07% in Exp. 2. The lowest dig. Lys diet was not supplemented with L-Lys in either one of the studies and all other essential amino acids (AA) met or exceeded current commercial recommendations such that their dietary concentrations did not limit broiler growth. Four birds per pen were randomly selected from each replication and processed at 35 and 42 d in Exp. 1 and Exp. 2, respectively. Deboned breast fillets were submitted to a 3 subject panel evaluation to detect the presence of WS and WB as well as to provide scores of WS (0-normal, 1-moderate, 2-severe) and WB (0-normal, 1-moderate light, 2-moderate, 3-severe). Increased dig. Lys had a positive effect on body weight, carcass and breast weight as well as breast yield. White striping and WB prevalences were 32.3 and 85.9% in Exp 1 and 87.1 and 89.2% in Exp 2. Birds fed diets not supplemented with Lys had the lowest average WS and WB scores (0.22 and 0.78 in Exp. 1 and 0.61 and 0.68 in Exp. 2). White striping and WB presented linear responses to performance variables in Exp 1, whereas quadratic responses were observed for all variables in Exp 2. In conclusion, increasing Lys levels improved growth performance and carcass traits and induced the occurrence and severity of WS and WB lesions probably due to dig. Lys dietary levels that maximized the genetic potential for growth and breast meat yields.

Foram conduzidos dois experimentos para avaliar a prevalência e severidade das lesões de white striping (WS) e wooden breast (WB) em peitos de frangos alimentados com níveis crescentes de lisina digestível (Lis dig.) de 12 a 28 dias (Exp. 1) e de 28 a 42 dias (Exp. 2).Os testes foram conduzidos utilizando machos Cobb x Cobb 500 de empenamento lento com 1 dia de idade, ambos com 6 tratamentos e 8 repetições cada. O aumento da Lis dig. foi igualmente espaçado de 0,77 a 1,17% no Exp. 1 e de 0,68 a 1,07% no Exp. 2. A dieta com nível mais baixo de Lis dig. não foi suplementada com L-Lisina no experimentos e todos os outros aminoácidos (AA) essenciais estão de acordo ou excedem em até 5% as recomendações comerciais, a fim de não limitar o crescimento das aves. Foram selecionadas aleatóriamente quatro aves por repetição e processadas aos 35 e 42 dias nos Exp. 1 e 2, respectivamente. Os peitos desossados foram submetidos a avaliação de 3 pessoas para detectar a presença de WS e WB assim como fornecer os escores de WS (0-normal, 1-moderao, 2-severo) e WB (0-normal, 1-moderado leve, 2-moderado, 3-severo). O aumento da Lis dig. apresentou efeito positivo no peso vivo, peso da carcaça e peito bem como no rendimento de peito. A prevalência de WS e WB foi 32,3 e 85,9% no Exp. 1 e 87,1 e 89,1% no Exp. 2. Aves submetidas a dieta sem suplementação de Lis apresentaram os menores escores médios de WS e WB (0,22 e 0,78 no Exp. 1 e 0,61 e 068 no Exp. 2). Respostas lineares foram obtidas através das variáveis de desempenho para WS e WB no Exp. 1, enquanto que a resposta para as variáveis no Exp. 2 foram quadráticas. O aumento dos níveis de Lis melhora o desempenho zootécnico e as caracteristicas das carcaças, além de induzir a ocorrência e severidade das lesões de WS e WB, devido, provavelmente, aos níveis de Lis que maximizam o potencial genético para crescimento e rendimento de peito. / Two experiments were conducted to evaluate the prevalence and severity of white striping (WS) and wooden breast (WB) in breast fillets from broilers fed diets with increasing digestible lysine (dig. Lys) from 12 to 28 d (Exp. 1) and from 28 to 42 d (Exp. 2). Trials were sequentially conducted using 1-d-old slow feathering Cobb × Cobb 500 male broilers, both with 6 treatments and 8 replicates each. Increasing dig. Lys levels were equally spaced from 0.77 to 1.17% in Exp. 1 and from 0.68 to 1.07% in Exp. 2. The lowest dig. Lys diet was not supplemented with L-Lys in either one of the studies and all other essential amino acids (AA) met or exceeded current commercial recommendations such that their dietary concentrations did not limit broiler growth. Four birds per pen were randomly selected from each replication and processed at 35 and 42 d in Exp. 1 and Exp. 2, respectively. Deboned breast fillets were submitted to a 3 subject panel evaluation to detect the presence of WS and WB as well as to provide scores of WS (0-normal, 1-moderate, 2-severe) and WB (0-normal, 1-moderate light, 2-moderate, 3-severe). Increased dig. Lys had a positive effect on body weight, carcass and breast weight as well as breast yield. White striping and WB prevalences were 32.3 and 85.9% in Exp 1 and 87.1 and 89.2% in Exp 2. Birds fed diets not supplemented with Lys had the lowest average WS and WB scores (0.22 and 0.78 in Exp. 1 and 0.61 and 0.68 in Exp. 2). White striping and WB presented linear responses to performance variables in Exp 1, whereas quadratic responses were observed for all variables in Exp 2. In conclusion, increasing Lys levels improved growth performance and carcass traits and induced the occurrence and severity of WS and WB lesions probably due to dig. Lys dietary levels that maximized the genetic potential for growth and breast meat yields.

Foram conduzidos dois experimentos para avaliar a prevalência e severidade das lesões de white striping (WS) e wooden breast (WB) em peitos de frangos alimentados com níveis crescentes de lisina digestível (Lis dig.) de 12 a 28 dias (Exp. 1) e de 28 a 42 dias (Exp. 2).Os testes foram conduzidos utilizando machos Cobb x Cobb 500 de empenamento lento com 1 dia de idade, ambos com 6 tratamentos e 8 repetições cada. O aumento da Lis dig. foi igualmente espaçado de 0,77 a 1,17% no Exp. 1 e de 0,68 a 1,07% no Exp. 2. A dieta com nível mais baixo de Lis dig. não foi suplementada com L-Lisina no experimentos e todos os outros aminoácidos (AA) essenciais estão de acordo ou excedem em até 5% as recomendações comerciais, a fim de não limitar o crescimento das aves. Foram selecionadas aleatóriamente quatro aves por repetição e processadas aos 35 e 42 dias nos Exp. 1 e 2, respectivamente. Os peitos desossados foram submetidos a avaliação de 3 pessoas para detectar a presença de WS e WB assim como fornecer os escores de WS (0-normal, 1-moderao, 2-severo) e WB (0-normal, 1-moderado leve, 2-moderado, 3-severo). O aumento da Lis dig. apresentou efeito positivo no peso vivo, peso da carcaça e peito bem como no rendimento de peito. A prevalência de WS e WB foi 32,3 e 85,9% no Exp. 1 e 87,1 e 89,1% no Exp. 2. Aves submetidas a dieta sem suplementação de Lis apresentaram os menores escores médios de WS e WB (0,22 e 0,78 no Exp. 1 e 0,61 e 068 no Exp. 2). Respostas lineares foram obtidas através das variáveis de desempenho para WS e WB no Exp. 1, enquanto que a resposta para as variáveis no Exp. 2 foram quadráticas. O aumento dos níveis de Lis melhora o desempenho zootécnico e as caracteristicas das carcaças, além de induzir a ocorrência e severidade das lesões de WS e WB, devido, provavelmente, aos níveis de Lis que maximizam o potencial genético para crescimento e rendimento de peito. / Two experiments were conducted to evaluate the prevalence and severity of white striping (WS) and wooden breast (WB) in breast fillets from broilers fed diets with increasing digestible lysine (dig. Lys) from 12 to 28 d (Exp. 1) and from 28 to 42 d (Exp. 2). Trials were sequentially conducted using 1-d-old slow feathering Cobb × Cobb 500 male broilers, both with 6 treatments and 8 replicates each. Increasing dig. Lys levels were equally spaced from 0.77 to 1.17% in Exp. 1 and from 0.68 to 1.07% in Exp. 2. The lowest dig. Lys diet was not supplemented with L-Lys in either one of the studies and all other essential amino acids (AA) met or exceeded current commercial recommendations such that their dietary concentrations did not limit broiler growth. Four birds per pen were randomly selected from each replication and processed at 35 and 42 d in Exp. 1 and Exp. 2, respectively. Deboned breast fillets were submitted to a 3 subject panel evaluation to detect the presence of WS and WB as well as to provide scores of WS (0-normal, 1-moderate, 2-severe) and WB (0-normal, 1-moderate light, 2-moderate, 3-severe). Increased dig. Lys had a positive effect on body weight, carcass and breast weight as well as breast yield. White striping and WB prevalences were 32.3 and 85.9% in Exp 1 and 87.1 and 89.2% in Exp 2. Birds fed diets not supplemented with Lys had the lowest average WS and WB scores (0.22 and 0.78 in Exp. 1 and 0.61 and 0.68 in Exp. 2). White striping and WB presented linear responses to performance variables in Exp 1, whereas quadratic responses were observed for all variables in Exp 2. In conclusion, increasing Lys levels improved growth performance and carcass traits and induced the occurrence and severity of WS and WB lesions probably due to dig. Lys dietary levels that maximized the genetic potential for growth and breast meat yields.

<p><strong>Apstrakt je obrađen tehnologijama za optičko prepoznavanje teksta (OCR).</strong></p><p>Razvojem novih tehnika, odnosno metoda potenciometrijske striping analize (PSA), značajno je povećana osetljivost određivanja osnovne modifikacije PSA sa kiseonikom kao oksidansom. Definisane su metode za određivanje olova i kadmijuma u standardnoj elektrohemijskoj ćeliji, tankoslojnoj protočnoj ćeliji i tubulamom protočnom sistemu.<br />Ostvarena je granica osetljivosti od 50 ng/dm³, uz reproduktivnost od oko 15%, izraženom kao koeficijent varijacije. Tačnost novih tehnika je potvrđena dobrim slaganjem rezultata analiza uzoraka pijaće vode sa rezultatima uporednih analiza izvedenih primenom osnovne modifikacije PSA, kao referentne metode.<br />Sve analize su izvedene uz primenu kompjuterizovanog striping analizatora domaće konstrukcije i proizvodnje (Tehnolo&scaron;ki fakultet, Novi Sad &mdash; &rdquo;Elektrouniverzal&rdquo;, Leskovac).</p> / <p><strong>Abstract was processed by technology for Optical character recognition (OCR).</strong></p><p>А new and high sensitive techniques (methods) of the potentiometric stripping analysis аге developed. Methods for lead and cadmium determination in conventional electrochemical cell, are defined. The detection limit of 50 ng/dm3 is obtanied, by the reproducibility about 15% (CV). The ассuracу of the new techniques is confirmed by good agreements of the results of the tap water analyses, with the results obtanied from the same samples analysed by conventional PSA, as reference method. All analyses аге carried by a computerized stripping analyzer constructed and made by the Faculty of Technology, Novi Sad and &rdquo;Elektrouniverzal&rdquo;, Leskovac.</p>

No / This Short Report summarizes some initial results using real time GPS to navigate and collect magnetometer data using Foerster sensors and a magnetic cart. The Foerster system is primarily aimed at the detection of buried ordnance and, by comparison to some other magnetometer sensors, the reported sensitivity is relatively low. However, the sensors require no alignment in the field, nor does the system require a regular contiguous grid to be established across the survey area. The latter means that data grids of different sizes and orientation can be measured and stitched together as part of data restoration prior to processing. The accurate positioning of the data means that `staggering¿, which is often seen in time-based collection strategies, is not apparent in the data; overall less processing is required to produce a final image than is required for other fluxgate instruments. Data from a survey at Cyrene are reproduced to illustrate the strengths of the system

A importância econômica da carne de aves conduziu extensivos esforços de seleção genética para aumentar o rendimento de peito de frangos de corte comerciais proporcionando músculos formados com o dobro de fibras musculares e com maior diâmetro. Esse aumento causou a incidências de alterações musculares peitorais denominadas de White Striping e Wooden Breast, conhecida respectivamente como estrias brancas e peito madeira. Foram utilizados 1.755 pintos de 3 linhagens (Cobb, Ross e Hubbard) distribuídos em delineamento inteiramente casualizado em arranjo fatorial 3X5 (três linhagens, cinco estratégias nutricionais) com nove repetições por tratamento, distribuídas em 135 boxes e densidade de 13 aves/m². Foram abatidas 1 ave por repetição aos 35, 42, 49 e 56 dias para as análises de desempenho, rendimento de carcaça e cortes, miopatias peitorais e composição nutricional do peito. As estratégias nutricionais (EN) foram: EN1 - desempenho regular, 500 FTU de fitase; EN2 - desempenho superior, 500 FTU de fitase; EN3 - desempenho superior, 1500 FTU; EN4 - desempenho superior, 500 FTU, complexo antioxidante; EN5 - desempenho superior, 1500 FTU, complexo antioxidante. Entre as linhagens, Ross predominou com o maior consumo de ração com 21, 49 e 56 dias e maior peso médio em todas as idades. A linhagem Hubbard que prevaleceu com a menor conversão alimentar aos 49 e 56 dias de idade. Para rendimento de carcaça Cobb e Ross foram superiores ao Hubbard com 35 dias e predominaram maior rendimento de peito entre as idades de abate. Hubbard obteve maior rendimento de pernas em todas as idades. Para consumo de ração, peso médio e conversão alimentar por EN, o consumo de ração só apresentou diferença significativa entre as EN nas fases iniciais (8-21 dias) e finais (50-56 dias). Quando observado o peso médio, a EN 5 teve o maior peso em todas as idades. O menor peso foi para as aves da EN 1 em todas as idades. Na análise de conversão percebe-se que a EN 1 teve a maior conversão nas fases: inicial (8-21 dias), crescimento (22-49 dias) e final (50-56 dias). EN 5 obteve a menor conversão alimentar na fase inicial e final. Não houve diferença significativa para incidência de White Striping em todas as idades entre linhagens. Para Wooden Breast (WB), houve diferença significativa entre as linhagens com 42, 49 e 56 dias de idade, onde Cobb prevaleceu com maior incidência nessas idades. Ross obteve junto ao Cobb as maiores incidências com 49 e 56 dias. Não houve diferença significativa entre White Striping e Wooden Breast entre as estratégias nutricionais. Para composição química do peito das aves entre as linhagens, observa-se que só houve diferença significativa para extra etéreo (EE) com 49 dias de idade, onde Cobb e Ross tiveram o maior percentual. Entre as estratégias nutricionais não houve diferença significativa para composição nutricional do peito. Há diferença significativa entre Cobb, Ross e Hubbard para desempenho e rendimento, o que afetam a incidência das miopatias peitorais. No entanto, entre as estratégias nutricionais não observou diferença significativa para incidências de White Striping e Wooden Breast. / The economic importance of poultry meat led extensive genetic selection efforts to increase breastfeeding of commercial broilers by providing muscles formed with twice the muscle fibers and with larger diameter. This increase caused incidences of pectoral muscle changes called White Striping and Wooden Breast, known respectively as white striations and chest wood. A total of 1,755 chicks (Cobb, Ross and Hubbard) were distributed in a completely randomized design in a 3X5 factorial arrangement (three lines, five nutritional strategies) with nine replicates per treatment, distributed in 135 boxes and density of 13 birds / m². One bird per replicate was slaughtered at 35, 42, 49 and 56 days for analyzes of performance, carcass yield and cuts, pectoral myopathies and nutritional composition of the breast. The nutritional strategies (EN) were: EN1 - regular performance, 500 FTU of phytase; EN2 - superior performance, 500 FTU of phytase; EN3 - superior performance, 1500 FTU; EN4 - superior performance, 500 FTU, antioxidant complex; EN5 - superior performance, 1500 FTU, antioxidant complex. Among the lineages, Ross predominated with the highest feed intake at 21, 49 and 56 days and highest mean weight at all ages. The Hubbard strain prevailed with the lowest feed conversion at 49 and 56 days of age. For carcass yield Cobb and Ross were superior to Hubbard with 35 days and had a higher breast yield between the slaughter ages. Hubbard obtained higher leg yield at all ages. For feed intake, mean weight and feed conversion by EN, feed intake only showed a significant difference between the early (8-21 days) and the late (50-56 days). When the average weight was observed, EN 5 had the highest weight in all ages. The lowest weight was for birds of EN 1 at all ages. In the conversion analysis, it was observed that EN 1 had the highest conversion in the phases: initial (8-21 days), growth (22-49 days) and final (50-56 days). EN 5 obtained the lowest feed conversion in the initial and final phases. There was no significant difference in the incidence of White Striping at all ages between strains. For Wooden Breast (WB), there was a significant difference between the 42, 49 and 56 days old strains, where Cobb prevailed with higher incidence at these ages. Ross obtained the highest incidences with Cobb at 49 and 56 days. There was no significant difference between White Striping and Wooden Breast between nutritional strategies. It was observed that there was only a significant difference for fat at 49 days of age, where Cobb and Ross had the highest percentage. Among nutritional strategies there was no significant difference in the nutritional composition of the breast. There is a significant difference between Cobb, Ross and Hubbard for performance and yield, which affect the incidence of pectoral myopathies. However, among the nutritional strategies did not observe significant difference for incidences of White Striping and Wooden Breast.

No description available.

No description available.