Selection of native trees for intercropping with coffee in the Atlantic Rainforest biome

A challenge in establishing agroforestry systems is ensuring that farmers are interested in the tree species, and are aware of how to adequately manage these species. This challenge was tackled in the Atlantic Rainforest biome (Brazil), where a participatory trial with agroforestry coffee systems was carried out, followed by a participatory systematisation of the farmers experiences. Our objective was to identify the main tree species used by farmers as well as their criteria for selecting or rejecting tree species. Furthermore, we aimed to present a specific inventory of trees of the Leguminosae family. In order to collect the data, we reviewed the bibliography of the participatory trial, visited and interviewed the farmers and organised workshops with them. The main farmers' criteria for selecting tree species were compatibility with coffee, amount of biomass, production and the labour needed for tree management. The farmers listed 85 tree species; we recorded 28 tree species of the Leguminosae family. Most trees were either native to the biome or exotic fruit trees. In order to design and manage complex agroforestry systems, family farmers need sufficient knowledge and autonomy, which can be reinforced when a participatory methodology is used for developing on-farm agroforestry systems. In the case presented, the farmers learned how to manage, reclaim and conserve their land. The diversification of production, especially with fruit, contributes to food security and to a low cost/benefit ratio of agroforestry systems. The investigated agroforestry systems showed potential to restore the degraded landscape of the Atlantic Rainforest biome

ROC-ROK International Fate: Decolonization, Democratization, and Pragmatism

Dramatic geopolitical developments such as the Chinese Civil War, World War ii (wwii), and the Korean War, along with the status inside of the United Nations (UN) created the grounds for the diplomatic position of Taiwan (Republic of China, ROC) and South Korea (Republic of Korea, ROK) in 20th century global politics that still persists unto the present. Years later, economic development and democratization would also be important factors in the elaboration of these countries’ foreign policies, as well as the maintenance or expansion of their international space, and their responses to the challenges posed by their powerful neighbors who claim those territories as part of their own, namely the Democratic People’s Republic of Korea (DPRK) and the People’s Republic of China (PRC). This chapter briefly discusses some elements that played essential roles,first from 1949 until 1971 when both Koreans and Taiwanese were fighting for their place inside the UN, and later from 1972 to the present, when the Sino-American rapprochement changed the balance of power in the region. The first part is organized around the idea that the way that Taipei, Seoul, and Beijing reacted to the decolonization process after wwii was one of the drivers behind the fate of Koreans and the Nationalist Chinese inside the UN

Enhancement of antimicrobial activity of antibiotics and antifungals by the use of natural products from Pityrogramma calomelanos (L.) link

The ethanol extract and methanol fraction of Pityrogramma calomelanos (L.) link were evaluated for antibacterial, antifungal and modulatory activities against strains of Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Candida albicans, C. krusei and C. tropicalis. The antimicrobial activity of the natural products was evaluated by the microdilution method associated or not with aminoglycosides and antifungals. The ethanol extract and methanol fraction of P. calomelanos showed good activity against S. aureus when associated with aminoglycosides and with benzoilmetronidazol against species of the genus Candida. These results indicate that P. calomelanos should be studied as a possible source of natural products to combat bacteria and fungi either directly or by modulating the mechanisms of resistance of these microorganisms, enhancing the antimicrobial activity of these drugs and combating microbial resistance

Acute low- compared to high-load resistance training to failure results in greater energy expenditure during exercise in healthy young men

The objective of the present study was to verify the energy expenditure (EE), energy system contributions and autonomic control during and after an acute low-load or high-load resistance training (RT) protocol to momentary failure (MF) in young adults. Eleven young men (22 ± 3 yrs, 71.8 ± 7.7 kg; 1.75 ± 0.06 m) underwent a randomized crossover design of three knee extension acute protocols: a low-load RT [30% of their maximal strength (1RM); RT30] or a high-load RT (80% of 1RM; RT80) protocol, with all sets being performed to MF; or a control session (Control) without exercise. Participants were measured for EE, energy system contributions, and cardiac autonomic control before, during, and after each exercise session. Exercise EE was significantly higher for RT30 as compared to RT80. Furthermore, post measurements of blood lactate levels and the anaerobic lactic system contribution were significantly greater for RT30 as compared to RT80. In addition, parasympathetic restoration was lower for RT30 as compared to RT80. In conclusion, a low-load (30% 1RM) RT session produced higher EE during exercise than a high-load (80% 1RM) RT session to MF, and may be a good option for fitness professionals, exercise physiologists, and practitioners when choosing the optimal RT protocol that provides more EE, especially for those who want or need to lose weight1411CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ123216/2015-

Synthesis And Characterization Of Zno And Zno:ga Films And Their Application In Dye-sensitized Solar Cells

Highly crystalline ZnO and Ga-modified zinc oxide (ZnO:Ga) nanoparticles containing 1, 3 and 5 atom% of Ga 3+ were prepared by precipitation method at low temperature. The films were characterized by XRD, BET, XPS and SEM. No evidence of zinc gallate formation (ZnGa 2O 4), even in the samples containing 5 atom% of gallium, was detected by XRD. XPS data revealed that Ga is present into the ZnO matrix as Ga 3+, according to the characteristic binding energies. The particle size decreased as the gallium level was increased as observed by SEM, which might be related to a faster hydrolysis reaction rate. The smaller particle size provided films with higher porosity and surface area, enabling a higher dye loading. When these films were applied to dye-sensitized solar cells (DSSCs) as photoelectrodes, the device based on ZnO:Ga 5 atom% presented an overall conversion efficiency of 6% (at 10 mW cm -2), a three-fold increase compared to the ZnO-based DSSCs under the same conditions. To our knowledge, this is one of the highest efficiencies reported so far for ZnO-based DSSCs. Transient absorption (TAS) study of the photoinduced dynamics of dye-sensitized ZnO:Ga films showed that the higher the gallium content, the higher the amount of dye cation formed, while no significant change on the recombination dynamics was observed. The study indicates that Ga-modification of nanocrystalline ZnO leads to an improvement of photocurrent and overall efficiency in the corresponding device. © 2008 The Royal Society of Chemistry.1114871491O'Regan, B., Gratzel, M., (1991) Nature, 353, p. 737. , -740Kroon, J.M., Bakker, N.J., Smit, H.J.P., Liska, P., Thampi, K.R., Wang, P., Zakeeruddin, S.M., Tulloch, G.E., (2007) Prog. Photovoltaics, 15, p. 1. , -18Ma, T., Akiyama, M., Abe, E., Imai, I., (2005) Nano Lett., 5, p. 2543. , -2547Ko, K.H., Lee, Y.C., Jung, Y.J., (2005) J. Colloid Interface Sci., 283, p. 482. , -487Kakiuchi, K., Hosono, E., Fujihara, S., (2006) J. Photochem. Photobiol., A, 179, p. 81. , -86Keis, K., Magnusson, E., Lindstrom, H., Lindquist, S.-E., Hagfeldt, A., (2002) Sol. Energy Mater. Sol. Cells, 73, p. 51. , -58Horiuchi, H., Katoh, R., Hara, K., Yanagida, M., Murata, S., Arakawa, H., Tachiya, M., (2003) J. Phys. Chem. B, 107, p. 2570. , -2574Katoh, R., Furube, A., Tamaki, Y., Yoshihara, T., Murai, M., Hara, K., Murata, S., Tachiya, M., (2004) J. Photochem. Photobiol., A, 166, p. 69. , -74Keis, K., Vayssieres, L., Rensmo, H., Lindquist, S.-E., Hagfeldt, A., (2001) J. Electrochem. Soc., 148, p. 149. , -A155Rensmo, H., Keis, K., Lindstrom, H., Sodergren, S., Solbrand, A., Hagfeldt, A., Lindquist, S.E., Muhammed, M., (1997) J. Phys. Chem. B, 101, p. 2598. , -2601Minami, T., Sato, H., Nanto, H., Takata, S., (1985) Jpn. J. Appl. Phys., 24, p. 781. , -L784Park, S.-M., Ikegami, T., Ebihara, K., (2006) Thin Solid Films, 513, p. 90. , -94Nonaka, M., Matsushima, S., Mizuno, M., Kobayashi, K., (2002) Chem. Lett., p. 580. , -581Ohkita, H., Cook, S., Ford, T.A., Greenham, N.C., Durrant, J.R., (2006) J. Photochem. Photobiol., A, 182, p. 225. , -230Haque, S.A., Tachibana, Y., Willis, R.L., Moser, J.E., Gratzel, M., Klug, D.R., Durrant, J.R., (2000) J. Phys. Chem. B, 104, p. 538. , -547Haque, S.A., Tachibana, Y., Klug, D.R., Durrant, J.R., (1998) J. Phys. Chem. B, 102, p. 1745. , -1749Gonçalves, A.S., Lima, S.A.M., Davolos, M.R., Antônio, S.G., Paiva-Santos, C.O., (2006) J. Solid State Chem., 179, p. 1330. , -1334Roberts, N., Wang, R.P., Sleight, A.W., Warren, W.W., (1998) Phys. Rev. B, 57, p. 5734Wang, R., Sleight, A.W., Cleary, D., (1996) Chem. Mater., 8, p. 433. , -439Passlack, M., Schubert, E.F., Hobson, W.S., Hong, M., Moriya, N., Chu, S.N.G., Konstadinidis, K., Zydzik, G.J., (1995) J. Appl. Phys., 77, p. 686. , -693Bhosle, V., Tiwari, A., Narayan, J., (2006) J. Appl. Phys., 100, p. 033713. , -033716Nazeeruddin, M.K., Kay, A., Rodicio, I., Humphrybaker, R., Muller, E., Liska, P., Vlachopoulos, N., Gratzel, M., (1993) J. Am. Chem. Soc., 115, p. 6382. , -6390Imai, Y., Watanabe, A., (2005) J. Mater. Sci., 15, p. 743. , -749Willis, R.L., Olson, C., O'Regan, B., Lutz, T., Nelson, J., Durrant, J.R., (2002) J. Phys. Chem. B, 106, p. 7605. , -7613Green, A.N.M., Palomares, E., Haque, S.A., Kroon, J.M., Durrant, J.R., (2005) J. Phys. Chem. B, 109, p. 12525. , -1253

Structural aspects of the fermion-boson mapping in two-dimensional gauge and anomalous gauge theories with massive fermions

Using a synthesis of the functional integral and operator approaches we discuss the fermion-boson mapping and the role played by the Bose field algebra in the Hilbert space of two-dimensional gauge and anomalous gauge field theories with massive fermions. In the $QED_2$ with quartic self-interaction among massive fermions, the use of an auxiliary vector field introduces a redundant Bose field algebra that should not be considered as an element of the intrinsic algebraic structure defining the model. In the anomalous chiral $QED_2$ with massive fermions the effect of the chiral anomaly leads to the appearance in the mass operator of a spurious Bose field combination. This phase factor carries no fermion selection rule and the expected absence of $\theta$-vacuum in the anomalous model is displayed from the operator solution. Even in the anomalous model with massive Fermi fields, the introduction of the Wess-Zumino field replicates the theory, changing neither its algebraic content nor its physical content.Comment: 26 pages, Revte

Incorporation Of Nanocrystals With Different Dimensionalities In Hybrid Tio2/p3ht Solar Cells

We investigate the effect of TiO2 nanoparticles-nanospheres and nanorods-inserted in the poly(3-hexylthiophene) (P3HT) matrix of TiO2?P3HT inverted hybrid solar cells. X-ray diffraction, high-resolution transmission electron microscopy, small-angle x-ray scattering, photoluminescence, and photoelectrochemical experiments were employed to investigate the structure, morphology, and photoactivity of TiO2 nanoparticles modified with 2-thiopheneacetic acid, mixed or not with P3HT. Both TiO2 nanospheres and TiO2 nanorods presented a good dispersion in the polymer matrix. The incorporation of TiO2 nanospheres and nanorods has improved the photocurrent generation, and devices with efficiency values up to 1.35% were obtained. Our results reveal that the nanoscale morphology enables an enhanced interfacial area for exciton dissociation. In particular, the nanospheres contribute with their high specific area, and the nanorods contribute with their high aspect ratio.51Lee, C.-K., Pao, C.-W., Chen, C.-W., Correlation of nanoscale organizations of polymer and nanocrystals in polymer/inorganic nanocrystal bulk heterojunction hybrid solar cells: Insights from multiscale molecular simulations (2013) Energy Environ. Sci., 6, pp. 307-315Huynh, W.U., Dittmer, J.J., Alivisatos, A.P., Hybrid nanorod: Polymer solar cells (2002) Science, 295, pp. 2425-2427Sian, S., Chen, C.-W., Polymer-metal-oxide hybrid solar cells (2013) J. Mater. Chem. A, 1, pp. 10574-10591Das, J., A facile nonaqueous route for fabricating titania nanorods and their viability in quasi-solid-state dye-sensitized solar cells (2010) J. Mater. Chem., 20, pp. 4425-4431Cozzoli, P.D., Kornowski, A., Weller, H., Low-temperature synthesis of soluble and processable organic-capped anatase TiO2 nanorods (2003) J. Am. Chem. Soc., 125, pp. 14539-14548Zeng, T.W., A large interconnecting network within hybrid MEH-PPV/TiO2 nanorod photovoltaic devices (2006) Nanotechnology, 17, p. 5387Yang, P., TiO2 nanowire electron transport pathways inside organic photovoltaics (2013) Phys. Chem. Chem. Phys., 15, pp. 4566-4572Lin, Y., Morphology control in TiO2 nanorod/polythiophene composites for bulk heterojunction solar cells using hydrogen bonding (2012) Macromolecules, 45, pp. 8665-8673Ranjitha, A., Inverted organic solar cells based on Cd-doped TiO2 as an electron extraction layer (2014) Superlattices Microstruct., 74, pp. 114-122Bolognesi, M., The effect of selective contact electrodes on the interfacial charge recombination kinetics and device efficiency of organic polymer solar cells (2011) Phys. Chem. Chem. Phys., 13, pp. 6105-6109Mor, G.K., High efficiency double heterojunction polymer photovoltaic cells using highly ordered TiO2 nanotube arrays (2007) Appl. Phys. Lett., 91, p. 152111Planells, M., Oligothiophene interlayer effect on photocurrent generation for hybrid TiO2/P3HT solar cells (2014) Appl. Mater. Interfaces, 6, pp. 17226-17235Freitas, F.S., Tailoring the interface using thiophene small molecules in TiO2/P3HT hybrid solar cells (2012) Phys. Chem. Chem. Phys., 14, pp. 11990-11993Liu, K., Efficient hybrid plasmonic polymer solar cells with Ag nanoparticle decorated TiO2 nanorods embedded in the active layer (2014) Nanoscale, 6, pp. 6180-6186Lin, Y.-Y., Interfacial nanostructuring on the performance of polymer/TiO2 nanorod bulk heterojunction solar cells (2009) J. Am. Chem. Soc., 131, pp. 3644-3649Eom, S.H., Roles of interfacial modifiers in hybrid solar cells: Inorganic/polymer bilayer versus inorganic/polymer: Fullerene bulk heterojunction (2014) Appl. Mater. Interfaces, 6, pp. 803-810Ravirajan, P., Hybrid polymer/zinc oxide photovoltaic devices with vertically oriented ZnO nanorods and an amphiphilic molecular interface layer (2006) J. Phys. Chem. B, 110, pp. 7635-7639Abate, A., Protic ionic liquids as p-dopant for organic hole transporting materials and their application in high efficiency hybrid solar cells (2013) J. Am. Chem. Soc., 135, pp. 13538-13548Beaucage, G., Approximations leading to a unified exponential/power-law approach to small-angle scattering (1995) J. Appl. Cryst., 28, pp. 717-728Beaucage, G., Small-angle scattering from polymeric mass fractals of arbitrary mass-fractal dimension (1996) J. Appl. Cryst., 29, pp. 134-146Beaucage, G., Kammler, H.K., Pratsinis, S.E., Particle size distributions from smallangle scattering using global scattering functions (2004) J. Appl. Cryst., 37, pp. 523-535Khatri, I., Similar device architectures for inverted organic solar cell and laminated solid-state dye-sensitized solar cells (2012) ISRN Electron., 10Choi, H.C., Jung, Y.M., Kim, S.B., Size effects in the Raman spectra of TiO2 nanoparticles (2005) Vib. Spectrosc., 37, pp. 33-38Li, G., Polymer self-organization enhances photovoltaic efficiency (2005) J. Appl. Phys., 98, p. 43704Salim, T., Solvent additives and their effects on blend morphologies of bulk heterojunctions (2011) J. Mater. Chem., 21, pp. 242-250Hwang, I.W., Carrier generation and transport in bulk heterojunction films processed with 1,8-octanedithiol as a processing additive (2008) J. Appl. Phys., 104, p. 033706Nguyen, H.Q., Synthesis and characterization of a polyisoprene-b-polystyrene-b-poly (3-hexylthiophene) triblock copolymer (2013) Polym. Chem., 4, pp. 462-465Prosa, T.J., X-ray structural studies of poly(3-alkylthiophenes): An example of an inverse comb (1992) Macromolecules, 25, p. 4364De Freitas, J.N., Connecting the (quantum) dots: Towards hybrid photovoltaic devices based on chalcogenide gels (2012) Phys. Chem. Chem. Phys., 14, pp. 15180-15184Yang, P., Identifying effects of TiO2 nanowires inside bulk heterojunction organic photovoltaics on charge diffusion and recombination (2014) J. Mater. Chem. C, 2, pp. 4922-4927Grancini, G., Boosting infrared light harvesting by molecular functionalization of metal oxide/polymer interfaces in efficient hybrid solar cells (2012) Adv. Funct. Mater., 22, pp. 2160-2166Liao, H.-C., Diketopyrrolopyrrole-based oligomer modified TiO2 nanorods for airstable and all solution processed poly(3-hexylthiophene): TiO2 bulk heterojunction inverted solar cell (2012) J. Mater. Chem., 22, pp. 10589-1059

Resolvin rvd2 reduces hypothalamic inflammation and rescues mice from diet-induced obesity

Diet-induced hypothalamic inflammation is an important mechanism leading to dysfunction of neurons involved in controlling body mass. Studies have shown that polyunsaturated fats can reduce hypothalamic inflammation. Here, we evaluated the presence and function of RvD2, a resolvin produced from docosahexaenoic acid, in the hypothalamus of mice. Methods: Male Swiss mice were fed either chow or a high-fat diet. RvD2 receptor and synthetic enzymes were evaluated by real-time PCR and immunofluorescence. RvD2 was determined by mass spectrometry. Dietary and pharmacological approaches were used to modulate the RvD2 system in the hypothalamus, and metabolic phenotype consequences were determined. Results: All enzymes involved in the synthesis of RvD2 were detected in the hypothalamus and were modulated in response to the consumption of dietary saturated fats, leading to a reduction of hypothalamic RvD2. GPR18, the receptor for RvD2, which was detected in POMC and NPY neurons, was also modulated by dietary fats. The substitution of saturated by polyunsaturated fats in the diet resulted in increased hypothalamic RvD2, which was accompanied by reduced body mass and improved glucose tolerance. The intracerebroventricular treatment with docosahexaenoic acid resulted in increased expression of the RvD2 synthetic enzymes, increased expression of anti-inflammatory cytokines and improved metabolic phenotype. Finally, intracerebroventricular treatment with RvD2 resulted in reduced adiposity, improved glucose tolerance and increased hypothalamic expression of anti-inflammatory cytokines. Conclusions: Thus, RvD2 is produced in the hypothalamus, and its receptor and synthetic enzymes are modulated by dietary fats. The improved metabolic outcomes of RvD2 make this substance an attractive approach to treat obesity14511

Neonatal screening for cystic fibrosis in São Paulo State, Brazil : a pilot study

Cystic fibrosis is one of the most common autosomal recessive hereditary diseases in the Caucasian population, with an incidence of 1:2000 to 1:3500 liveborns. More than 1000 mutations have been described with the most common being F508del. It has a prevalence of 23-55% within the Brazilian population. The lack of population-based studies evaluating the incidence of cystic fibrosis in São Paulo State, Brazil, and an analysis concerning the costs of implantation of a screening program motivated the present study. A total of 60,000 dried blood samples from Guthrie cards obtained from April 2005 to January 2006 for neonatal screening at 4 reference centers in São Paulo State were analyzed. The immunoreactive trypsinogen (IRT)/IRT protocol was used with the cut-off value being 70 ng/mL. A total of 532 children (0.9%) showed IRT >70 ng/mL and a 2nd sample was collected from 418 (80.3%) of these patients. Four affected children were detected at two centers, corresponding to an incidence of 1:8403. The average age at diagnosis was 69 days, and 3 of the children already showed severe symptoms of the disease. The rate of false-positive results was 95.2% and the positive predictive value for the test was 8%. The cost of detecting an affected subject was approximately US$8,000.00 when this cystic fibrosis program was added to an existing neonatal screening program. The present study clearly shows the difficulties involved in cystic fibrosis screening using the IRT/IRT protocol, particularly in a population with no long-term tradition of neonatal screening421