für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Recent years have witnessed that there is a revival of concern in drug discovery from medicinal plants for the maintenance of health in all parts of the world. The aim of this work was to investigate 4 plants belonging to 4 families (Calotropis gigantean, Mimosa pudica, Achyranthes aspera and Hibiscus rosa-siensis variety: Kalyani, which were collected from different places in Bangladesh (Faridpur) for their in vitro antibacterial, antioxidant and toxicological evaluation. The 4 plants were extracted with methanol and chloroform to yield 8 extracts by Soxhlet s extraction. Antimicrobial activity was tested by agar diffusion & broth micro-dilution assay. Antioxidant activity was investigated by measuring the scavenging activity of the DPPH (1, 1-diphenyl-2-picrylhydrazyl) radical. Evaluation for in vitro toxicological screening was done against MDCK (Madin-Darby Kanine Kidney) cells by using an established microtiter plate assay based on cellular staining with trypan blue. The results will guide the selection of some plant species for further pharmacological and phytochemical investigations. ····· 1036120281
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This study was on wild food plants (WFPs) indigenous knowledge and their ecological status in Queen Elisabeth National Park (QENP), Uganda. The study objectives were: (1) to inventory wild food plants (WFPs) known to the communities, (2) to establish if the communities in and around QENP consume WFPs, (3) to compare indigenous knowledge related to WFPs among age groups, gender and ethnicity. (4) to determine the ecological status of selected WFPs species. Semi-structured interviews involving free listing technique with households and groups of respondents food diary and transect walks were used to capture data. A total of 66 WFPs species were identified in the families of Solanaceae (7 species, frequency = 249) and Amaranthaceae (6 species, frequency = 501). Partial correlation showed age of the respondents as the predictor of WFPs indigenous knowledge, (p=0.011). Gender or ethnicity of the respondent did not affect WFPs knowledge, (p0.05). Nine WFPs species were recorded during the ecological study using the plot method in three ecosystems of grassland, woodland and forest within QENP. ····· 1036120128
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book gives insights and an analysis of how public participation, as part of the European Water Framework Directive (WFD), is applied in the Júcar River Basin in practice. Furthermore, it tried to examine to what extent the WFD and its participatory process influenced water quality policies and measures in particular. It seemed that the responsible authority, the Confederación Hidrográfica del Júcar (CHJ), as a hydrological and technocratic bureaucracy, has difficulties to bring new, more social civil and environmental movements together with the traditional stakeholders in an environment Ire sharing of information, creating mutual understanding and space for discussion is enabled. Besides the fact that Spain lacks a culture of public participation, the level of participation seems to stick to the level of information and consultation, Ire comments and propositions of, especially, civil and environmental movements are barely taken into account in policy design. Moreover, it is suggested that some economical and traditional Powerful stakeholders are able to make agreements with the CHJ concerning water policy design. ····· 1036119923
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Lactase is an enzyme that breaks down the milk sugar lactose into glucose and galactose. It has attracted the attention of many researchers as it has a wide area of application in many industries. This enzyme can be produced from different sources such as bacteria, yeast and mould. Commercial lactases are produced from both yeasts and moulds. De-spite the fact that many techniques have been developed based on different microorganisms, there is still a need for alternative enzyme sources. For example, in dairy industry lactases that are stable in a wide pH and temperature range should be used. In this book, production of lactase from alternative fungal sources was studied. Aspergillus oryzae isolated from dairy effluents was screened for its ability to produce lactase production under solid state fermentation and the experimental results were discussed. ····· 1036119872
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Tropical forests are important for maintaining life supporting mechanisms of the biosphere reserve. The floristic architecture and structure of these forests are sensitive to annual rainfall, its reliability and its seasonal distribution. While conditions of structural forests types are known, casual factors which are responsible for creation of variation at micro-level are unknown. Tropical forests are stable as well as fragile and the very character creates much of the variation that is needed for evolution of these ecosystems. These forests are more adapted to biological competition than environmental disturbances. Hence, they exhibit a complex pattern of developmental phases which confers to the whole system a certain resilience which helps in maintaining dynamic equilibrium. However, the massive interference by man who is equipped with modern technology in recent time has exceeded the capacity of the self-maintaining regulatory process and as a result dynamic stability has been destroyed over large parts of tropics. An interdisciplinary approach is discussed for formulating a sustainable development strategy. ····· 1036119558
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Water is one of our most important natural resources. Without it, there would be no life on earth. The lifestyle we have become accustomed to depend heavily upon having plenty of cheap, clean water available as well as an inexpensive, safe way to dispose of it after use. Today, we face record consumption, uncertain supplies, and growing demands for protection from flooding and pollution. The health and economic effects of a shortage of clean water are matters of great concern. The supply of water available for our use is limited by nature. Although there is plenty of water on earth, but it is not always in the right place, at the right time and in the right quality. This book contains 11 chapter and 08 tables, covering concept and standard model of chemical techniques, which is valuable for UG and PG students of Hydrology, Life science, Natural sciences. Chemistry and Environmental sciences. It is the hope that this book will help to students and people from every walk of life to understand the basic concept of water pollution , and to ensure the quality and sustainability of water and water resources on this planet earth. ····· 1036119357
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Among the climate change mitigation options, carbon capture and storage had been identified to have good future potentials, particularly on the ground that, fossil fuels will remain the major global sources of energy in the medium term. The technology also offers the advantages of enhanced oil and/or gas recovery from partly depleted or low producing reservoirs, and improved methane production from coal deposits. Therefore its full understanding through research and publications as recommended by United Nations Framework Convention on Climate Change (UNFCCC), Intergovernmental Panel on Climate Change (IPCC), Global CCS Institute and many other international organisations is necessary. The book Carbon Capture and Storage in the Fight for Sustainable Environment is a relevant material that reports important issues such as history, capture, transportation and storage aspects of the technology. The scope was extended to include commercialisation, ongoing projects and other economics and policy issues. Students and researchers will find it excellent, especially that it s content, is a summary of wide range and critical survey of relevant literature. ····· 1036118816
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Ecorestoration is a new subject in the modern days climate change earth system scenario. Therefore, restoration of degraded land using integrated biotechnological means is inevitable and worth mentioning. In this report we are describing detail step by step investigation on restoration of coalmine wastlend by phytoremediation. The whole study was the outcome of more than five years rigorous investigation taking Tirap colliery OB dump site as case study area. The findings inscripted are reproducible in such sort of coalmine watse land. ····· 1036118673
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Nonwovens represent one of the booming sectors in the textile industry today, with significant projected growth both domestically and globally. At present, cotton is supplanted by synthetic fibers in nonwovens, thereby limiting its utilization in an important market sector. This work was an exploratory study to investigate the effect of cotton fiber properties on nonwoven fabric properties. Results observed from this study show that the constituent fiber attributes have significant relationships with the nonwoven fabric characteristics. Taking these fiber properties into account during raw material selection for cotton nonwovens would be beneficial for manufacturers to optimize quality, and also predict final product characteristics. Further research in this area will help gain better understanding, and contribute towards improving cotton s marketability and utilization in the nonwoven industry. ····· 1036118656
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The world is changing at such a rapid pace that we cannot even guess what specific knowledge and skills will be critical for students of 21st century.Environmental Education is an interdisciplinary process with the goal of equipping people with the knowledge,attitudes and skills towards Environmental Education and motivation which they need to help resolve Environmental issues.Environmental Education is valuable and necessary. Starting from a very young age, children should be taught about the Environment that surrounds them.As they grow their Environmental attitude towards the area in which they live should also grow positively.For this their Education should be sequential and integrated with core disciplines. I hope this book will helps to students and teachers who are working in the area of Environmental Education to create awareness on Environmental Concerns among their students. ····· 1036118448
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The African elephant is perhaps the most iconic migratory land mammal on the continent, but catastrophic poaching in the 1970`s and 80`s saw their populations plummet. The effective ivory trade ban in 1989 has seen elephant numbers recover, but their migratory paths are now limited by human population expansion. Elephant crop-raids on farms are increasing and clashes with farmers can be fatal. This study explores elephant behaviour in relation to a unique natural threat in the wild - that of African honey bees. Elephants are shown to run from the sound of disturbed bees and when doing so, emit a unique low frequency alarm call that warns other elephants to retreat. This discovery led to the application of live honey bees, in the form of an innovative beehive fence network, to keep elephants away from farmland. Farmers benefit from fewer crop-raids on their farms as well as profiting from honey sales. This research, and the application of the theory in three communities in Kenya, shows how diversifying livelihood strategies and reducing human-elephant conflict can benefit poor rural farms and help to protect elephants from fatal confrontations. ····· 1036118325
····· lezzter Preis 29.80€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Johann Wolfgang Goethe: Zur FarbenlehreLesefreundlicher Großdruck in 16-pt-SchriftGroßformat, 210 x 297 mmBerliner Ausgabe, 2019Durchgesehener Neusatz bearbeitet und eingerichtet von Theodor BorkenAnzeige und Übersicht des Goethischen Werkes zur Farbenlehre: Selbstanzeige. Erstdruck in: Morgenblatt für gebildete Stände, 6. Juni 1810.Zur Farbenlehre. Didaktischer Teil: Erstdruck in: Zur Farbenlehre, 1. Bd., Stuttgart 1808.Materialien zur Geschichte der Farbenlehre: Erstdruck in: Zur Farbenlehre, 2. Bd., Stuttgart 1810.Inhaltsverzeichnis:Anzeige und Übersicht des Goethischen Werkes zur Farbenlehre.Zur Farbenlehre. Didaktischer Teil.Vorwort.Einleitung.1. Abteilung. Physiologische Farben.2. Abteilung. Physische Farben.3. Abteilung. Chemische Farben.4. Abteilung. Allgemeine Ansichten nach Innen.5. Abteilung. Nachbarliche Verhältnisse.6. Abteilung. Sinnlich-sittliche Wirkung der Farbe.Materialien zur Geschichte der Farbenlehre.Einleitung.Zur Geschichte der Urzeit.1. Abteilung. Griechen.2. Abteilung. Römer.3. Abteilung. Zwischenzeit.4. Abteilung. Sechzehntes Jahrhundert.5. Abteilung. Siebzehntes Jahrhundert.6. Abteilung. Achtzehntes Jahrhundert [I].6. Abteilung. Achtzehntes Jahrhundert [II].Umschlaggestaltung von Thomas Schultz-Overhage unter Verwendung des Bildes: Farbenkreis, aquarellierte Federzeichnung von Goethe, 1809.Gesetzt aus der Minion Pro, 16 pt.Henricus Edition Deutsche Klassik UG (haftungsbeschränkt) ····· 1036114040
für 24.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Alexander von Humboldt (1769-1859) nannte es ein `Lieblingswerk` - seine Ansichten der Natur. Zurückgekehrt von der sensationellen Forschungsreise durch Lateinamerika, schildert der Weitgereiste seine noch frischen Eindrücke. Verfasst hat Alexander von Humboldt keine Faktensammlung, sondern einen grandiosen Überblick über Ströme, Urwälder, Vulkane, Bodenschätze, Klima, Bio- und Geologie, Lebensweise und Wirtschaft der Einwohner des Kontinents. Und wie immer geht es ihm dabei um das lebendige Zusammenwirken aller Kräfte der Natur und der Kultur. Von seiner Fähigkeit zur Synthese, die der modernen Wissenschaft weitgehend abhandengekommen ist, können wir heute nur träumen. In der ANDEREN BIBLIOTHEK sind von Alexander von Humboldt Ansichten der `Kordilleren und Monumente der eingeborenen Völker Amerikas` und sein Hauptwerk `Kosmos` erschienen. 2017 veröffentlichte die ANDERE BIBLIOTHEK das biographische Porträt `Mein vielbewegtes Leben`, präsentiert von Frank Holl. ····· 1036111871
für 39.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Ein Werk der Wunder - jetzt mit 80 bislang unveröffentlichten Aquarellen »Johann Friedrich Naumann lebte in einer Zeit des naturwissenschaftlichen Aufbruchs, und er zählte zur Avantgarde dieser Bewegung. Überall in Europa blickte man plötzlich mit Interesse auf die Natur, forschte, reiste, entdeckte, katalogisierte, klassifizierte. Rückblickend kann man sagen, dass diese Bewegung, die in England wohl am lebhaftesten war und am systematischsten vonstatten ging, ein paar Jahrzehnte später zur Evolutionstheorie Darwins führte, welche die Naturforschung auf eine neue Grundlage stellte. Naumann wurde damals fraglos als der größte Ornithologe Deutschlands angesehen. Seine grundlegende Leistung war die Naturgeschichte der Vögel Deutschlands, deren letzter Band im Sommer 1844 erschien. Alle 380 Illustrationen zeichnete und stach er selbst in Kupfer. Die Vorlagen in Aquarell sind atemberaubend. Nie zuvor hat es ein vergleichbar gründliches, mit so viel Sachkenntnis und persönlicher Erfahrung angereichertes Buch über die deutsche Vogelwelt gegeben, und man musste bis ins 20. Jahrhundert warten, um auch nur annähernd Gleichwertiges zu entdecken.« ····· 1036111746
für 13.99€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Charles Darwin ist vielen als Begründer der Evolutionstheorie bekannt. Aus dieser Theorie leitet sich auch der ``Sozialdarwinismus`` ab. Ist das berechtigt Darwins Engagement für die Gleichheit der Menschen - Männer und Frauen aller Ethnien - ist wenig bekannt. Lassen Sie sich von dieser Seite des berühmten Biologen überraschen! Darwins aus der Evolutionstheorie abgeleitetes Engagement für eine Gleichberechtigung der Frau stellt eine für die Mitte des 19. Jahrhunderts nahezu revolutionäre und überaus fortschrittliche Haltung dar. Die für Charles Darwin selbstverständliche Gleichheit von Mann und Frau - als gleichwertige Menschen - illustriert Rainer Willmann in diesem spannenden Buch. Das Engagement Darwins und seiner Kollegen und Zeitgenossen Thomas Henry Huxley und Alfred Russel Wallace für eine Gleichheit in Bildung und Beruf für Frauen beeindruckt auch 200 Jahre nach Darwins Geburt. Aus dem Inhalt: Die unbekannte Frau Charles Darwin Sklaverei und die Rassenfrage Charles und Emma Darwin Sexuelle Selektion Darwins Kritikerinnen Darwins Bild von der Partnerwahl Harriet Martineau Darwin, Feministinnen und der Kampf gegen die Vivisektion Gleiche Rechte für alle Rassen des Menschen Thomas Henry Huxley Huxleys Einsatz für die Bildung der Frauen Frauen im Studium Frauen in wissenschaftlichen Gesellschaften Evolutionsmechanismen und Ethik Alfred Russel Wallace Die vielen Zugänge zur Evolution des Menschen Sozialdarwinismus Darwin - der erste Sozialdarwinist Selektionsmechanismen in menschlichen Gesellschaften in Huxleys Sicht Eugenik Rückschau ····· 103616254
für 32.31€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray L`expérimentation a été réalisée durant l`année 2015, dans une parcelle expérimentale (sous serre) dans la région de Cherfech (Nord de la Tunisie). Elle vise la quantification et la valorisation des efficiences de l`utilisation de l`eau et de la lumière d`une culture de quinoa (Chenoppodium Quinoa Willd.), sous irrigation avec des eaux salines (1,2 6 et 12 g l-1). Les résultats obtenus ont montré que la production de la matière sèche totale cumulée (MST) a diminué de 6,75 à 13,36 % suite à l`augmentation de la concentration en sel de l`eau d`irrigation de 6 à 12 g l-1. De même, pour l`indice foliaire (LAI) et la consommation en eau (ETR), une réduction de (10,8 à 15,3 %) et de (4 à 7 %) ont été marquée respectivement pour les deux traitements 6 et 12 g l-1. Néanmoins, aucune différence significative (p 0,05) de l`effet qualité d`eau sur la radiation photo synthétiquement active (PAR abs) n`a été observée. Une légère diminution de l`efficience de l`utilisation de l`eau (EUE) de (5,4 5,3 et 5,07 kg m-3) et de l`efficience de l`utilisation de la lumière (EUL) de (3,1 2,9 et 2,6 g MJ-1) a été discerné respectivement avec les trois traitements (1,2 6 et 12 g l-1 de Na Cl). ····· 103614747
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In recent years, the North-Western part of Bangladesh has been experiencing land degradation as well as changing landuse patterns due to huge population and their socio-economic activities. To perform this research, Landsat TM and ETM+ of 1989 and 2001 were used to identify land degradation and to assess landuse change over 12 years in the study area. According to the change detection report from 1989 to 2001, irrigated agriculture increased about 156 Km2 while winter agriculture is decreased about 49 Km2 over the areas. During this period, forest has decreased whereas settlements increased by 13 Km2. The overall accuracy and Kappa coefficient of the change detection were 80 % and 77%, respectively. The brightness image of a Tasseled Cap Transform (TCT) was used to extract dry soil in this study. Degraded soils have increased from 1989 (3% of total lands) to 2001 (6% of total lands) while forest and winter agriculture changed to irrigated agriculture and settlements. The resulting images show water bodies increased due to new excavation of ponds, lakes, and canals over 12 years in the study area. ····· 103613497
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The spectrophotometric properties of porphyrins are altered upon interaction with nucleic acids, proteins, and amino acids. TPPS immobilized as a monolayer onto a cellulose film exhibits an absorbance peak in the Soret region. The interaction of the porphyrin with the follwing amino acids arginine, glycine, histidine and serine induces blue shifts in the Soret that enables us to quantify and identify these amino acids in the nM scale. The interaction of PCP with the following porphyrins and metaloporphyrins TPPS, Zn-TPPS, TPPS1, C1TPP, C4TPP, Cu-C4TPP in solution induces a red shift in the Soret spectrum that enables us to quantify PCP in concentrations less than the MCL recommended by EPA. The interaction of the TPPS1 immobilized as a monolayer on a Kimwipe® tissue with PCP induces a red shift in the Soret spectrum that enables us to detect PCP as low as 0.5ppb. The Photocatalytic degradation of PCP by the above porphyrins in solution and the immobilized TPPSCl as catalysts in pH7 buffer was achieved using fluorescence light. It is believed that singlet oxygen 1O2 is the major oxidant species that was photosensitized, and accomplish the mineralization of PCP to CO2 and HCl. ····· 103613251
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book investigates stakeholder perceptions, conflict, and public support for coastal resource management (CRM) policies in Southern Cebu, Philippines. The author examines and relates stakeholder attitudes and normative beliefs of CRM with public support for coastal policies implemented at the levels of the community, municipality, and the Marine Protected Area (MPA) Network. To understand stakeholder perceptions, the author applies the Potential for Conflict Index (PCI2) that graphically displays the average amount of consensus, normative beliefs, and the potential for conflict to occur in a given CRM scenario. The author also applies conflict mapping for understanding stakeholder stories of institutional conflict and accountability. Using in-depth interviews, conflict mapping methods enable the analysis of institutional relationships among stakeholders accountable for CRM and how these relationships influence CRM at the community, municipality, and the MPA Network. Theoretical and managerial implications include applying normative theories and conflict analysis frameworks for understanding stakeholder perceptions of CRM. ····· 103613183
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Desde siempre los riesgos naturales han demandado inspiración para realizar investigaciones y desarrollos tecnológicos con el fin de mitigar sus efectos dañinos en beneficio del ser humano. En las dos últimas décadas, las investigaciones realizadas sobre el fenómeno avalancha de nieve han aportado una mejor comprensión sobre su origen. La información nivometeorológica y los modelos numéricos desarrollados han permitido obtener las relaciones existentes entre los diferentes factores que inciden en el comportamiento de una avalancha. El transporte de nieve por el viento tiene un especial interés en la predicción de ocurrencia de avalanchas de nieve. En Argentina, por primera vez, se desarrolló un dispositivo que opera desde el año 2007 bajo condiciones climáticas adversas en alta montaña. El enfoque del libro se centra en los resultados de estudios realizados sobre el fenómeno avalancha de nieve en el Valle de Las Leñas del departamento de Malargüe (Provincia de Mendoza, Argentina). El aporte de esta obra consiste en precisar la información necesaria para el desarrollo de un sistema experto que permita realizar una correcta predicción del fenómeno avalanchoso. ····· 103612946
für 26.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En materia de cruzamiento la opción decidida por Cuba fue la de formar una nueva raza, lo cual no es una propuesta a corto plazo (estabilizar la proporción de 5/8 Holstein, 3/8 Cebú). Este proyecto se inició en la década de 1960 con la importación de ganado Holstein a Cuba (procedente de Canadá) con la finalidad de crear una nueva raza adaptada a nuestras condiciones. El Siboney de Cuba es fruto del trabajo de más de 40 años. Los animales se encuentran entre la 4ta y 5ta generación de apareamiento inter.-se y han estado sometidos en una década a condiciones que desde el punto de vista genético han sido muy cercanas a aquellas bajo las cuales opera la selección natural, lo cual representa una connotación particular en este proceso. En esta compilación se han recopilado algunos resultados de trabajos publicados o presentados en eventos científicos que tratan de caracterizar desde un punto de vista general el comportamiento de la raza Siboney de Cuba (5/8 Holstein, 3/8 Cebú), formada en Cuba y que en estos momentos constituye el genotipo lechero básico del país y que igualmente ha tenido resultados satisfactorios en otros países, principalmente en América Latina. ····· 103612828
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La presente investigación consistió en evaluar las condiciones de un acuífero de tipo libre en Mexicali, Baja California, México, desde el punto de vista de la contaminación por hidrocarburos de origen industrial. Se observa que el sitio mantiene concentraciones de hidrocarburos por encima de los niveles máximos permisibles establecidos en la normatividad Mexicana, debido al inadecuado empleo y manejo de sustancias industriales derivadas del petróleo. Se caracterizó el lugar para dar lugar a un modelo conceptual del sitio. Se simuló el comportamiento del hidrocarburo interpretándose el máximo alcance de la afectación de éste a través del suelo, subsuelo y aguas subterráneas. Una vez determinado el comportamiento y predicción de los contaminantes se estimó el efecto potencial de la atenuación natural como posible técnica de restauración. Además, se proponen las tecnologías óptimas apropiadas a las condiciones de operación prevalecientes en el lugar con el fin de lograr su remediación. ····· 103612728
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La Botánica Morfológica es una disciplina básica de numerosas carreras biológicas y como tal deberá ser abordada por los estudiantes, quienes se enfrentan a este cúmulo de información, que crece diariamente. Como docentes de Morfología de Plantas Vasculares hemos implementando como instrumento didáctico estos textos, con los siguientes objetivos: Contribuir a la lectura previa del tema, para que el alumno concurra a las clases prácticas y teóricas con conocimientos que le permitan plantear inquietudes como consecuencia de un proceso reflexivo previo. Facilitar la comprensión de los preparados macro y microscópicos observados en las clases prácticas y los conceptos teóricos relacionados. En esta primera entrega hemos abordado la organización básica de las plantas vasculares, explorando la diversidad en la estructura externa de las plantas. Temas: La organización del cuerpo de las Plantas. Hoja. Adaptaciones del cormo. Flor. Sexualidad e Inflorescencia. Fruto y semilla. Glosario. Bibliografía. Este material se encuentra disponible en el sitio web: biologia.edu.ar/botanica, donde además de estos contenidos podrá encontrar animaciones, videos, enlaces a glosarios, etc. ····· 103612606
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En este libro se describen los fundamentos básicos del Ruido Magnético de Barkhausen. El Ruido Magnético de Barkhausen se produce en todos los materiales ferromagnéticos durante el proceso de magnetización. Este fenómeno es debido al movimiento discontinuo de las paredes de dominios magnéticos por la interacción de estas con los micro-defectos del material. El movimiento discontinuo de estas paredes produce fluctuaciones en el flujo magnético en la superficie del material las cuales pueden ser medidas con ayuda de un sensor magnético. La señal medida es a lo que se conoce como señal de Ruido Magnético de Barkhausen y contiene mucha información acerca de la micro-estructura del material. Analizando esta señal es posible obtener información acerca de la composición química, tamaño de grano, nivel de tensión o deformación a que está siendo sometido el material, entre otras propiedades. Debido a todo esto el Ruido Magnético de Barkhausen es una de las técnicas de inspección no destructiva de aceros más útiles en la actualidad. ····· 103612594· 1 · ::::: · 19 ·· 20 ·· 21 ·· 22 ·· 23 ·· 24 ·· 25 · ::::: · 26 ·
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