35,923 research outputs found

    Agaricus rufotegulis Nauta in Portugal

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    Agaricus rufotegulis Nauta a Portugal. Una troballa d'Agaricus rufotegulis feta a Portugal es presenta, juntament amb dades macro i microscòpiques, i s' il·lustra per primer cop amb una fotografia en color.Agaricus rufotegulis Nauta in Portugal. A find of Agaricus rufotegulis from Portu gal is documented macro- and microscopically. A colour photo is given of this recently described species for the first time.Agaricus rufotegulis Nauta en Portugal. Una recolección de Agaricus rufotegulis de Portugal se presenta con datos macro y microscópicos y se ilustra, por primera vez, con una foto en color

    Agaricus rufotegulis Nauta in Portugal

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    Agaricus rufotegulis Nauta a Portugal. Una troballa d'Agaricus rufotegulis feta a Portugal es presenta, juntament amb dades macro i microscòpiques, i s' il·lustra per primer cop amb una fotografia en color.Agaricus rufotegulis Nauta en Portugal. Una recolección de Agaricus rufotegulis de Portugal se presenta con datos macro y microscópicos y se ilustra, por primera vez, con una foto en color.Agaricus rufotegulis Nauta in Portugal. A find of Agaricus rufotegulis from Portu gal is documented macro- and microscopically. A colour photo is given of this recently described species for the first time

    A Reappraisal of the Ascending Systems in Man, with Emphasis on the Medial Lemniscus

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    This volume of "Advances in Anatomy, Embryology and Cell Biology" is based on material assembled by Dr. Jaap H.R. Schoen who was one of the few neuroanatomists to apply the Nauta method to human material. Gaining insight in the consequences of longitudinal damage to the human spinal cord is necessary before reimplantation of the avulsed rootlets or an autologous transplant can be performed in man

    The Sedimentology, Ichnology and Hydrogeochemistry of the Late Miocene, Marginal Marine, Upper Pebas and Nauta Formations, Amazonian Foreland Basin, Peru

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    This thesis includes detailed sedimentological and ichnological studies on two geological units: the Pebas Formation, with a special focus in its informal upper member, and the Nauta Formation. Both formations were deposited during the Miocene in Northeastern Peruvian Amazonia, in the Amazon retroarc foreland basin. The Pebas and Nauta successions mainly consist of non-consolidated, clastic sedimentary deposits arranged into sand- to mud-dominated heterolithic successions, which can be upward-coarsening to upward-fining. Sediments in both the Pebas and Nauta successions range from mud to fine- to medium-grained sand. The main facies observed were 1) mud-dominated horizontal heterolithic couplets; 2) rooted brownish mud; 3) lenticular, mud-draped, cross-stratified sand; 4) mud- to sand-dominated, inclined heterolithic stratification; 5) sand-dominated horizontal heterolithic couplets; and 6) mud-draped, trough cross-stratified sand. Locally, tidal rhythmites were documented. The facies are interpreted as: 1) muddy, shallow, subaqueous flats/shoals; 2) palaeosols; 3) secondary tidal channels or run-off creeks; 4) tidally influenced point bars; 5) shoreface deposits; and 6) subtidal compound dunes. Thalassinoides-dominated Glossifungites ichnofacies, low-diversity expressions of the Skolithos ichnofacies and depauperate suites consisting of elements common to the Cruziana ichnofacies strongly indicate brackish-water conditions. However, continental trace fossil assemblages, with possible elements common to the Scoyenia ichnofacies, have also been identified. In addition to the palaeoenvironmental study, a local hydrogeochemical characterisation of the Pebas and Nauta formations was also conducted. The geochemistry of the groundwaters reflects the characteristics and the soil geochemistry of the geological formations studied. The Pebas formation has low hardness, acid to neutral waters, whereas the upper Pebas has high hardness, acid to neutral waters. In both units, the arsenic content is locally high. The Nauta formation has low hardness acid groundwaters. A regional review of the Pebas and Nauta formations placed the local observations into a continental perspective and suggests that the whole Pebas-Nauta system was a probably shallow (some tens of metres at maximum), brackish- to freshwater, tidally-influenced epicontinental embayment with a probable semi-diurnal to mixed tidal regime and a microtidal range, surrounded by continental environments such as forest floors, lagoons, rivers and their flood plains, and lakes.Siirretty Doriast

    Analog IC Design at the University of Twente

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    This article describes some recent research results from the IC Design group of the University of Twente, located in Enschede, The Netherlands.\ud \ud Our research focuses on analog CMOS circuit design with emphasis on high frequency and broadband circuits. With the trend of system integration in mind, we try to develop new circuit techniques that enable the next steps in system integration in nanometer CMOS technology. Our research funding comes from industry, as well as from governmental organizations. We aim to find fundamental solutions for practical problems of integrated circuits realized in industrial Silicon technologies.\ud \ud CMOS IC technology is dictated by optimal cost and performance of digital circuits and is certainly not optimized for nice analog behavior. As analog designers, we do not have the illusion to be able to change the CMOS technology, so we have to "live with it" and solve the problems by design. In this article several examples will be shown, where problematic analog behavior, such as noise and distortion, can be tackled with new circuit design techniques. These circuit techniques are developed in such a way that they do benefit from the modern technology and thus enable further integration. This way we can improve various analog building blocks for wireless, wire-line and optical communication. Below some examples are given.\ud \u

    Quantitative microbiological risk assessment as a tool to obtain useful information for risk managers - specific application to Listeria monocytogenes and ready-to-eat meat products

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    The presence of Listeria monocytogenes in a sliced cooked, cured ham-like meat product was quantitatively assessed. Sliced cooked, cured meat products are considered as high risk products. These ready-to-eat, RTE, products (no special preparation, e.g. thermal treatment, before eating is required), support growth of pathogens (high initial pH = 6.2–6.4 and water activity = 0.98–0.99) and has a relatively long period of storage at chilled temperatures with a shelf life equal to 60 days based on manufacturer's instructions. Therefore, in case of post-process contamination, even with low number of cells, the microorganism is able to reach unacceptable levels at the time of consumption. The aim of this study was to conduct a Quantitative Microbiological Risk Assessment (QMRA) on the risk of L. monocytogenes presence in RTE meat products. This may help risk managers to make decisions and apply control measures with ultimate objective the food safety assurance. Examples are given to illustrate the development of practical risk management strategies based on the results obtained from the QMRA model specifically developed for this pathogen/food product combinatio

    Vision of breeding for organic agriculture

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    This report describes the results of research into the vision of breeding systems within organic agriculture in the Netherlands. The purpose of the research was to arrive at a vision for breeding in organic agriculture by means of interviews and discussions with organic livestock farmers and social organisations. The research was prompted by the fact that, as things stand, organic livestock farmers generally have to rely on the conventional breeding supply. Neither the breeding method not the animal type produced meet the requirements of organic agriculture. Interest in breeding has increased because organic agriculture is expanding, and as yet too little attention has been paid to the development of specific organic breeding programmes and associated legislation. In recent decades conventional agriculture and breeding have tended more and more towards industrialisation and uniformity with breeding becoming a multinational concern. The breeding organisations have no incentive at present to provide special services for organic agriculture as the market is too small and the costs are too high. Taking the current breeding situation as the starting point, a number of scenarios are described for each animal sector which could gradually lead to a system of breeding which is more organic both in its aims and in the chain-based approach. The naturalness of the breeding techniques is an important factor in considering the available options. The different scenarios served as a basis for the interviews and discussions with livestock farmers and social organisations. We have established that the farmers and organisations consider it important for organic agriculture to work on developing a breeding system which follows the principles of organic agriculture. The most important reasons for this are that: (1) consumers expect all production factors in the chain to be of organic origin, (2) most livestock farmers currently use conventional breeding techniques which fall short of the organic requirements on a number of points, such as the use of artificial reproduction techniques and mono-functional breeding for production. For the development of organic breeding, livestock farmers feel that in the first instance the use of artificial reproduction techniques, including cloning and transgenic techniques, should be restricted. Next the livestock farmers and social organisations want breeding to be adapted to or based on the organic environment. There is a suspicion that owing to genotype-environment interaction (G x E) conventionally-bred animals cannot adapt well to the organic environment, and this leads to health and welfare problems. The farmers would like to see this development taking place within 5 to 10 years. It must however proceed one step at a time since the farmers cannot yet form a complete picture of the impact of all the different factors. Most of the people involved see the ideal form of breeding, with natural reproduction and regional or farm-specific selection, as a standard to be achieved in the distant future. At the moment most livestock farmers have neither the knowledge nor the socio-economic means to set up such breeding programmes. The development of breeding and the associated legislation require an international approach, for which suitable contacts must be sought in other countries. The final chapter of this report looks in more detail at the steps to be taken in each sector. Ideally developments should probably be initiated and supervised by a central body, such as an organic breeding foundation, which could be set up to govern the breeding of all farm animals

    Possibilities for Breeding in Organic Dairy Farming

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    In the organic sector there is an ongoing debate about the development of organic breeding methods. The debate revolves around two issues: 1) how the principle of naturalness in organic agriculture (that is, using natural processes wherever possible) can be reconciled with the increasing use of modern reproduction techniques in conventional breeding; and 2) whether animals produced by conventional breeding programs are actually suitable for organic agriculture or whether the organic sector itself should start producing animals that fit into organic production systems. Investigations into these issues gave rise to a doctorate research: “Selective breeding in organic dairy production

    Juvenile sex offenders: mental health and reoffending

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    Doreleijers, T.A.H. [Promotor]Vermeiren, R.R.J.M. [Promotor]Nauta-Jansen, L.M.C. [Copromotor
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