Agricultural productivism, cosmopolitan plant-breeding, and the severed roots of agroecological thought.

Política de acceso abierto tomada de: https://beta.sherpa.ac.uk/id/publication/24927This article provides a historical account of the emergence of crop ecology, a precursor of modern agroecology, in the twentieth century. It focuses on the transnational career of agronomist Ioannis Papadakis, a founding figure in this scientific discipline, while contextualizing his work as part of broader state-led projects of agricultural modernization in Europe and Latin America. This study has two implications concerning the history of agroecology. First, that agricultural productivism and a cosmopolitan outlook on plant breeding, often considered to be at odds with agroecology's principles, were in fact necessary elements for the emergence of crop ecology, and therefore of agroecological thought more generally. Second, we argue that the excesses of the Green Revolution, against which agroecology reacted in the last decades of the twentieth century, did not just stem from a disregard for the agricultural knowledge of indigenous peasants. They also resulted from the marginalization of intellectual dispositions that had taken shape in peripheral areas within the global geography of scientific production. A third implication, specific to the history of Greek agriculture, is that the claim that interwar Greece’s rural economy failed to substantially develop needs to be nuanced when the priorities of Greek agronomists are taken into consideration

The First Peasant and His Fellow Travelers: State Control over Greek Agricultural Institutions under Metaxas.

Política de acceso abierto tomada de: https://www.cambridge.org/core/services/open-access-policies/open-access-journals/green-open-access-policy-for-journalsState control over Greece’s agricultural institutions increased during Metaxas’ authoritarian regime (1936-1941). Analyzing such state control allows us to address, in the Greek context, two questions with regard to fascist agrarian regimes. First, considering the trajectory of agricultural policy before the emergence of these regimes, how much of what they did was new, and how much was not? Second, how did the cadres of agricultural specialists participate in, or at least accommodate, the new regimes? Our research shows that Metaxas received support from the agronomists that had been active in Greece under previous liberal administrations. Such support did not take the form of laudatory statements or ideologydriven activism. It was rather a discreet acceptance of the new circumstances, combined with defection from one’s previous political camp. Metaxas’ dictatorship inherited most traits that made it a fascist agricultural regime from previous liberal administrations

Case Study - Greece, Sustainable Agriculture and Soil Conservation (SoCo Project)

This Technical Note 'Case Study ¿ Greece' is part of a series of case studies within the ¿Sustainable Agriculture and Soil Conservation¿ (SoCo) project. Ten case studies were carried out in Belgium, Bul-garia, the Czech Republic, Denmark, France, Germany, Greece, Italy, Spain and the United Kingdom between spring and summer 2008. The selection of case study areas was designed to capture differ-ences in soil degradation processes, soil types, climatic conditions, farm structures and farming prac-tices, institutional settings and policy priorities. A harmonised methodological approach was pursued in order to gather insights from a range of contrasting conditions over a geographically diverse area. The case studies were carried out by local experts to reflect the specificities of the selected case stud-ies.JRC.DDG.J.5-Agriculture and Life Sciences in the Econom

Flow modeling in Pelton turbines by an accurate Eulerian and a fast Lagrangian evaluation method

The recent development of Computational Fluids Dynamics (CFD) has allowed the flow modeling in impulse hydro turbines that includes complex phenomena like free surface flow, multi fluid interaction, and unsteady, time dependent flow. Some commercial and open-source CFD codes, which implement Eulerian solving methods, have been validated against experimental results showing satisfactory accuracy. Nevertheless, further improvement of the flow analysis accuracy is still a challenge, while the computational cost is very high and unaffordable for multi-parametric design optimization of the turbine’s runner. In the present work, a CFD Eulerian approach is applied at first, in order to simulate the flow in the runner of a Pelton turbine model installed at the laboratory. Then, a particulate method, the Fast Lagrangian Simulation (FLS), is used for the same case, which is much faster than the Eulerian approach, and hence potentially suitable for numerical design optimization, providing that it can achieve adequate accuracy. The results of both methods for various operation conditions of the turbine, as also for modified runner and bucket designs, are presented and discussed in the paper. In all examined cases the FLS method shows very good accuracy in predicting the hydraulic efficiency of the runner, although the computed flow evolution and torque curve during the jet-runner interaction exhibit some systematic differences from the Eulerian results

Nanostructured Melt-Spun Sm(Co,Fe,Zr,B)7:5 Alloys for High-Temperature Magnets

High coercivity, the highest for Cu-free 2 : 17 Sm-Co ribbons, has been obtained in as-spun (= 211 kOe) and short time annealed (= 232 kOe) samples of Sm(CobalFe Zr B)7 5 alloys, with varying B, Zr, and Fe content (= 0-0 06, = 0-0 16, = 0 08-0 3) and wheel speed. In as-spun samples, the TbCu7 type structure and in annealed samples the Th2Zn17 and CaCu5 type structures is observed, plus fcc Co as minority phase is observed. Reduced remanence () is higher than 0.7. High-temperature magnetic measurements show very good stability above 300 C with coercive field as high as 5.2 kOe at 330 C. For annealed Sm(CobalFe0 3Zr0 02B0 04)7 5, very good loop squareness and high maximum energy product of 10.7 MGOe have been obtained. Increasing Zr content results in less uniform microstructure of annealed ribbons.Comment: IEEE Transactions on Magnetics, Vol. 39, No. 5, pages 2869 - 2871, September 200

Investigating the influence of the jet from three nozzle and spear design configurations on Pelton runner performance by numerical simulation

This paper reports the initial results of three dimensional CFD simulations of the jet – runner interactions in a twin jet horizontal axis Pelton turbine. More specifically, the analysis examines the impact of the nozzle and spear valve configuration on the performance of the runner. Previous research has identified that injectors with notably steeper nozzle and spear angles attain a higher efficiency than the industry standard. However, experimental testing of the entire Pelton system suggests that there appears to be an upper limit beyond which steeper angled designs are no longer optimal. In order to investigate the apparent difference between the numerical prediction of efficiency for the injector system and the obtained experimental results, four different jet configurations are analysed and compared. In the first configuration, the interaction between the runner and an ideal axisymmetric jet profile is investigated. In the final three configurations the runner has been coupled with the jet profile from the aforementioned injectors, namely the Standard design with nozzle and spear angles of 80° & 55° and two Novel designs with angles 110° & 70° and 150° & 90° respectively. The results are compared by examining the impact the jet shape has on the runner torque profile during the bucket cycle and the influence this has on turbine efficiency. All results provided incorporate the Reynolds averaged Navier Stokes (RANS) Shear Stress Transport (SST) turbulence model and a two-phase Volume of Fluid (VOF) model, using the ANSYS® FLUENT® code. Therefore, this paper offers new insights into the optimal jet – runner interaction

High-Throughput Mass Measurement Of Single Bacterial Cells By Silicon Nitride Membrane Resonators

Trabajo presentado en la 36th International Conference on Micro Electro Mechanical Systems (MEMS), celebrada en Munich (Alemania), del 15 al 19 de enero de 2023.© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.We present a technological approach to precisely measure the dry mass of many individual cells of a bacteria colony. In this technique, bacteria are transported from aqueous solution into gas phase and subsequently guided to the surface of a silicon nitride membrane resonator. Abrupt downshifts in the membrane eigenfrequencies are measured upon every bacterium adhesion and are related to the dry mass of the cell by theoretical methods. We measure the dry mass of Escherichia coli K-12 and Staphylococcus epidermidis with an unprecedented throughput of 20 cells/min and with a mass resolution of ⁓1%. Finally, we apply the Koch & Schaechter model to assess the intrinsic sources of growth stochasticity.This work was supported by the European Union’s Horizon 2020 Research and Innovation Program under Grant Agreement No. 731868-VIRUSCAN and by the ERC CoG Grant 681275 “LIQUIDMASS”. We acknowledge the service from the Micro and Nanofabrication Laboratory an X-SEM laboratory at IMNCNM funded by the Comunidad de Madrid (Project S2018/NMT-4291 TEC2SPACE) and by MINECO (Project CSIC12-4E-1794 with support from FEDER, FSE). E. G. S. acknowledges financial support by the Spanish Science and Innovation Ministry through Ramón y Cajal grant RYC-2019-026626-I

High-throughput nanomechanical mass spectrometry of bacterial cells

Trabajo presentado en el 19th International Workshop on Nanomechanical Sensing (NMC 2024), celebrado en Viene (Austria), del 24 al 27 de junio de 202

Optomechanical disk resonators for real-time environmental monitoring and single-nanoparticle detection

Trabajo presentado en el 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META), celebrado en París (Francia), del 18 al 21 de julio de 202

Corrigendum to "Recognition motifs for importin 4 [(L)PPRS(G/P)P] and importin 5 [KP(K/Y)LV] binding, identified by bio-informatic simulation and experimental in vitro validation" [Comput Struct Biotechnol J 20 (2022) 5952-5961]

Nuclear translocation of large proteins is mediated through karyopherins, carrier proteins recognizing specific motifs of cargo proteins, known as nuclear localization signals (NLS). However, only few NLS signals have been reported until now. In the present work, NLS signals for Importins 4 and 5 were identified through an unsupervised in silico approach, followed by experimental in vitro validation. The sequences LPPRS(G/P)P and KP(K/Y)LV were identified and are proposed as recognition motifs for Importins 4 and 5 binding, respectively. They are involved in the trafficking of important proteins into the nucleus. These sequences were validated in the breast cancer cell line T47D, which expresses both Importins 4 and 5. Elucidating the complex relationships of the nuclear transporters and their cargo proteins is very important in better understanding the mechanism of nuclear transport of proteins and laying the foundation for the development of novel therapeutics, targeting specific importins