1,175 research outputs found
Demo 93. Globos conectados y ley de Laplace
Objetivo: Observar la mayor presiĂłn existente en un globo de menor radio en comparaciĂłn con la
menor presiĂłn que existe en un globo de mayor radio
Demo 92. Balanza hidrostática con dinamómetro. Densidad de sólidos
Objetivo: Estimar la densidad de un objeto a partir de la diferencia entre su peso en aire (peso real) y
su peso en un determinado fluido (peso aparente)
El espejismo de un problema arquitectónico: sobre la exposición «Buildings for Best Products» en el MOMA de Nueva York
El espejismo de un problema arquitectónico: sobre la exposición «Buildings for Best Products» en el MOMA de Nueva Yor
El Concurso de BerlĂn-capital. Canto del cisne del urbanismo moderno
El Concurso de BerlĂn-capital. Canto del cisne del urbanismo modern
La vigencia del funcionalismo. A propĂłsito de las estaciones de bomberos americanas
La vigencia del funcionalismo. A propĂłsito de las estaciones de bomberos americana
Un perfil con historia. El edificio AT&T de Johnson/Burgee
Un perfil con historia. El edificio AT&T de Johnson/Burge
A way of preserving Caenorhabditis elegans
Aquaculture is a "breeding" of recent implantation that needs many improvement processes. One of the problems that arise is the feeding of fish larvae, which need live food. It has been proven that these fish larvae can be fed from the Caenorhabiditis elegans nematode, which is easy to grow. In order to carry out the industrial application it is necessary to develop a method in which the nematodes are kept as long as possible, thus ensuring their survival. All this to be able to transport them efficiently. (Brüggemann, 2012).One of these methods can be dehydration from salts. In C. elegans the larval stage known as dauer survive desiccation after preconditioning, which consist in a reduction of humidity for several hours (Erkut et al. 2011, Erkut et al. 2013, Honnens et al.2013). It has also been shown that C. elegans can uptake trehalose from the medium increasing resistance to stress. In addition to the trehalose another method to improve the adaptation to stress is that C.elegans is in the larval Dauer state. Another method of preservation that is used is the freezing of these nematodes (WormBook.org).The keys to a successful freeze are using animals at the correct stage of development, the addition of glycerol to the freezing media, and a gradual cooling to -80°C. Freshly starved young larvae (L1-L2 stage) survive freezing best. A 15% final volume of glycerol in the freezing solution is used. Finally the C.elegans are defrosted at room temperature.To observe the results of the dehydration method, we must hydrate the nematodes with M9 solution and see what their survival rate is. For now with this method the results are not totally satisfactory since the nematodes hold very little time in dry state. If you want to observe the results of the survival rate of thawed worms, you have to transfer them to a nutritious medium at a temperature of 20ºC and after 24 hours you count the survival rate of these worms. The results of the thawing is around 10% after a 4 month period.Although the performance of both experiments are not totally satisfactory at the moment, we will try to improve the methodology used to obtain higher survival rates in a longer time in a preserved state. The objective of this work is to find the method and the most effective way to develop the preservation method that obtains the best survival rate and for the longest time
Non-Lipschitz differentiable functions on slit domains
It is proved the existence of large algebraic structures –including large vector subspaces or infinitely generated free algebras– inside the family of non-Lipschitz differentiable real functions with bounded gradient defined on special non-convex plane domains. In particular, this yields that there are many differentiable functions on plane domains
that do not satisfy the Mean Value Theorem.Plan Andaluz de InvestigaciĂłn (Junta de AndalucĂa)Ministerio de EconomĂa y Competitividad (MINECO). Españ
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