Caracterização preliminar do cacho e da qualidade da uva de onze clones putativos da cultivar "Moscato Branco".

O cacho da cultivar ?Moscato Branco? apresenta compacidade elevada, o que favorece a ocorrência de podridões. Onze clones putativos da cultivar ?Moscato Branco? foram coletados na Serra Gaúcha e estão sendo avaliados para confirmar diferenças em relação à cultivar original

Transient Effects of Snow Cover Duration on Primary Growth and Leaf Traits in a Tundra Shrub

With the recent climate warming, tundra ecotones are facing a progressive acceleration of spring snowpack melting and extension of the growing season, with evident consequences to vegetation. Along with summer temperature, winter precipitation has been recently recognised as a crucial factor for tundra shrub growth and physiology. However, gaps of knowledge still exist on long-living plant responses to different snowpack duration, especially on how intra-specific and year-to-year variability together with multiple functional trait adjustments could influence the long-term responses. To fill this gap, we conducted a 3 years snow manipulation experiment above the Alpine treeline on the typical tundra species Juniperus communis, the conifer with the widest distributional range in the north emisphere. We tested shoot elongation, leaf area, stomatal density, leaf dry weight and leaf non-structural carbohydrate content of plants subjected to anticipated, natural and postponed snowpack duration. Anticipated snowpack melting enhanced new shoot elongation and increased stomatal density. However, plants under prolonged snow cover seemed to compensate for the shorter growing period, likely increasing carbon allocation to growth. In fact, these latter showed larger needles and low starch content at the beginning of the growing season. Variability between treatments slightly decreased over time, suggesting a progressive acclimation of juniper to new conditions. In the context of future warming scenarios, our results support the hypothesis of shrub biomass increase within the tundra biome. Yet, the picture is still far from being complete and further research should focus on transient and fading effects of changing conditions in the long term

A Comment on Conical Flow Induced by Heavy-Quark Jets

The suppression of high transverse momentum particles, recently discovered at RHIC, is commonly interpreted as due to parton energy loss. In high energy nuclear collisions, QCD jets would deposit a large fraction of their energy and into the produced matter. The question of how this energy is degraded and whether we can use this phenomenon to probe the properties of the produced matter is now under active discussion. It has been proposed that if this matter, which is now being referred to as a {\em strongly coupled Quark-Gluon Plasma} (sQGP), may behave as a liquid with a very small viscosity. In this case, a very specific collective excitation should be produced, called the ``conical flow'', similar e.g. to the sonic booms generated by the shock waves produced by supersonic planes. The RHIC experiments seem indeed to be obtaining some indication that the production of particles emitted opposite to a high-$p_t$ jet may actually be peaked away from the quenched jet direction, at an angle roughly consistent with the direction expected in case a shock wave is produced (i.e. orthogonal to the Mach cone). In this note we speculate that for tagged heavy-quark jets one may observe a shrinkage of the Mach cone at moderate $p_t$. The experimental observation of such an effect would be a very good test for the validity of the whole picture currently emerging from the study of partonic matter in nuclear collisions

Ação de estimulantes vegetais no comportamento do feijoeiro (Phaseolus vulgaris L. cv. goiano precoce)

This research deals with the effects of Pix, Atonik, Ergostim and Cytozyme application on behavior of beans (Phaseolus vulgaris L. cv. Goiano Precoce), under greenhouse conditions. Beans were sowing in pots and Pix and Atonik (1.0 l/ha), Ergostim (0.5 l/ha) and Cytozyme (2.0 l/ha) were applied 30 days after sowing. Ergostim promoted growth and presented a tendency to increase number of pods and seeds, and reduced K/r ratio. Pix presented a tendency to increase number of pods, K/r ratio and protein level in the seeds. Atonik and Cytozyme did not promote changes in the parameters studied.Este ensaio foi realizado com o objetivo de estudar os efeitos de estimulantes vegetais no desenvolvimento do feijoeiro 'Goiano Precoce', em condições de casa de vegetaçio. Pix (cloreto de mepiquat), Atonik (mononitroguaiacolsódico + compostos nitroaromáticos), Ergostim (AATC + ácido fólico) e Cytozyme (citocinina + derivados de etoxilato-siloxano + outros compostos) foram aplicados, 30 dias após a semeadura, nas dosagens de 1,0; 1,0; 0,5 e 2,0 l/ha, respectivamente. Verificou-se que Ergostim causou maior crescimento e apresentou uma tendência de aumentar o número de vagens e sementes, tendo reduzido a relação K/r. Pix mostrou uma tendência de aumentar o número de vagens, a relação K/r e o teor de proteína nas sementes. Atonik e Cytozyme não provocaram modificações nos parâmetros estudados

Perfil sensorial de vinhos elaborados com uvas americanas e híbridas.

A avaliação da qualidade de vinhos envolve a utilização de atributos visuais, olfativos e gustativo

Caracterização físico-química e sensorial de sucos elaborados com diferentes acessos de videira.

Resumo: A cor violácea o sabor e o aromasão características importantes para a aceitação do suco de uva pelo consumidor. O suco de uva também está associado com alto conteúdo de compostos relacionados à saúde. O objetivo deste trabalho foi caracterizar a cor, os atributos físico - químicos e avaliar sensorialmente sucos elaborados com oito acessos mantidos pelo Banco Ativo de Germoplasma de uva (BAG - Uva): novas cultivares (BRS Rúbea, BRS Cora, BRS Violeta, BRS Carmeme BRS Magna) e tradicionais (Bordô, Concorde Isabel)

Personal control of the indoor environment in offices: Relations with building characteristics, influence on occupant perception and reported symptoms related to the building-the officair project

Personal control over various indoor environment parameters, especially in the last decades, appear to have a significant role on occupants' comfort, health and productivity. To reveal this complex relationship, 7441 occupants of 167 recently built or retrofitted office buildings in eight European countries participated in an online survey about personal/health/work data as well as physical/psycho-social information. The relationship between the types of control available over indoor environments and the perceived personal control of the occupants was examined, as well as the combined effect of the control parameters on the perceived comfort using multilevel statistical models. The results indicated that most of the occupants have no or low control on noise. Half of the occupants declared no or low control on ventilation and temperature conditions. Almost one-third of them remarked that they do not have satisfactory levels of control for lighting and shading from sun conditions. The presence of operable windows was shown to influence occupants' control perception over temperature, ventilation, light and noise. General building characteristics, such as floor number and floor area, office type, etc., helped occupants associate freedom positively with control perception. Combined controlling parameters seem to have a strong relation with overall comfort, as well as with perception regarding amount of privacy, office layout and decoration satisfaction. The results also indicated that occupants with more personal control may have less building-related symptoms. Noise control parameter had the highest impact on the occupants' overall comfort

Avaliação do potencial de novas cultivares de videiras do tipo americana para elaboração de vinhos*.

Os vinhos agem como potentes aliados à saúde, pois em sua composição encontram-se diversos compostos, dentre eles os polifenóis, com elevada ação antioxidante. Recentemente, foram lançadas novas cultivares de videira para elaboração de suco que apresentam potencial para a elaboração de vinho de mesa. O objetivo deste trabalho foi determinar o conteúdo de antocianinas totais, de polifenóis totais e caracterizar a cor dos vinhos elaborados com seis novas cultivares de videiras (Concord Clone 30, BRS Carmem, BRS Cora, BRS Magna, BRS Rúbea e BRS Violeta) e com duas tradicionais (?Concord? e ?Isabel?).(Embrapa Uva e Vinho. Documentos, 99

Avaliação do potencial de acessos de videiras do tipo americana para elaboração de vinhos de mesa.

Vinhos tintos de cor violácea intensa estão associados com alto conteúdo de compostos relacionados à saúde. O objetivo deste trabalho foi caracterizar a cor, e o conteúdo de compostos relacionados à saúde de vinhos elaborados com oito acessos mantidos pelo Banco Ativo de Germoplasma de uva (BAG-Uva): novas cultivares (BRS Rúbea, BRS Cora, BRS Violeta, BRS Carmem, BRS Magna e Concord Clone 30) e tradicionais (Isabel e Concord)

Recursos e capacidades para inovação agrícola digital em arranjos emergentes: revisão sistemática e agenda de pesquisa.

Este estudo objetivou identificar lacunas de pesquisa sobre os recursos e as capacidades essenciais para a inovação digital na agricultura no contexto de arranjos organizacionais emergentes. Por meio de revisão bibliográfica sistemática (RBS) na Web of Science foram identificados oportunidades de pesquisa nos seguintes temas: ambiente regulatório; desenvolvimento de método de análise para sistemas de inovação não lineares, considerando perspectiva organizacional e capacidades; capacidades de adaptação e de absorção e barreiras à adoção de tecnologias digitais; impacto da adoção; novas funções e capacidades de consultores agrícolas; efeito de tecnologias inteligentes em substituição ou complementação das funções de consultores agrícolas; relações e colaborações entre atores provedores de tecnologias