Avaliação e seleção de porta-enxertos de cajueiro anão precoce.

O cultivo de cajueiro anao precoce ... Atualmente, encontram-se disponiveis para cultivo seis clones de cajueiro anao precoce, dos quais somente quatro sao explorados comercialmente para copa ...bitstream/CNPAT-2010/5382/1/Pa-075.pd

Mobile Virtual Reality as an Educational Platform: A Pilot Study on the Impact of Immersion and Positive Emotion Induction in the Learning Process

[EN] The purpose of this study is to evaluate the influence of emotional induction and level of immersion on knowledge acquisition and motivation. Two conditions were used for immersion modulation: a high immersive condition, which consisted of the viewing of educational content through a head-mounted-display; and a low immersive condition, which was achieved through direct viewing on a tablet. The emotional conditions, created through video simulation, consisted of a positive versus neutral mood induction procedure. The participants were 56 high school students enrolled on a social science course. The results indicate a significant effect of the positive emotion/high immersive condition in knowledge acquisition while positive emotion induction had a positive effect on the interest subscale of the motivation assessment tool used for both immersive conditions.Olmos-Raya, E.; Ferreira-Cavalcanti, J.; Contero, M.; Castellanos-Baena, M.; Chicci-Giglioli, I.; Alcañiz, M. (2018). Mobile Virtual Reality as an Educational Platform: A Pilot Study on the Impact of Immersion and Positive Emotion Induction in the Learning Process. Eurasia Journal of Mathematics Science and Technology Education. 14(6):2045-2057. doi:10.29333/ejmste/858742045205714

Seleção de genótipos de algodoeiro para resistência ao estresse salino.

Com o objetivo de selecionar genótipos (cultivares e/ou linhagens) de algodoeiro para tolerância à salinidade, foi conduzido um experimento em casa de vegetação no Centro Nacional de Pesquisa do Algodão, em Campina Grande-PB. Foram testados 57 genótipos de algodoeiro pertencentes ao banco de germoplasma da Embrapa sob dois níveis de salinidade 4,0 e 8,0 dS/m

Crescimento de meloeiro adubado com compostos orgânicos provenientes de diferentes resíduos.

O cultivo orgânico de frutas e hortaliças tem crescido geometricamente em resposta a grande demanda que surge por produtos naturais, limpos e saudáveis. Muitas práticas podem ser utilizadas em cultivo orgânico destacando-se a cobertura morta, coquetel de espécies vegetais, compostagem, etc. O presente trabalho tem o objetivo de avaliar o crescimento do meloeiro adubado com compostos orgânicos provenientes de diferentes resíduos. Aos 35 dias após o plantio, foi avaliado o efeito de 33 compostos no desenvolvimento do melão cv. Gold Mine. As combinações de compostos elaborados com bagaço de coco, enriquecidos com termofosfato e sulfato de potássio promoveram um maior desenvolvimento vegetativo do meloeiro.Suplemento. Edição dos resumos expandidos do 45. Congresso Brasileiro de Olericultura; 15. Congresso Brasileiro de Floricultura e Plantas ornamentais; 2. Congresso Brasileiro de Cultura de Tecidos de Plantas, Fortaleza, ago. 2005

Use of bioremediation for the removal of petroleum hydrocarbons from the soil: an overview

Large amount of organic and inorganic compounds are released constantly in the environment as a consequence of human activity and technological and industrial advancement. Environmental pollution by petroleum and petrochemicals, such as petroleum hydrocarbons (PHCs), is considered one of the most serious hazards today due to its worldwide distribution. Contamination by these pollutants causes degradation of global environment and a substantial reduction in biodiversity. In addition, a deep removal of the pollutants is often required to prevent their migration into the water, air and therefore threaten human health. In this way, the search for ecologically sustainable approaches to repair contaminated environments have been of great concern in society. Bioremediation is a technique, based on the metabolic activity of living organisms, which aims to reduce, degrade and/or remove contaminants from the marine and terrestrial ecosystems. It is a more economical and more efficient process to minimize waste, compared to the usual physical-chemical treatment methods. Historically, bioremediation has been used to restore environments polluted by PHCs, where microbial communities play a key role during this course, either by the direct degradation of pollutants or by interaction with other microorganisms. Finally, this review discusses about the soil contamination by PHCs, the role of living organisms in this mechanism and their recent application in bioremediation process

Caracterização morfológica dos solos do centro de treinamento do Instituto Regional da Pequena Agropecuária Apropriada - IRPAA.

O objetivo deste trabalho foi avaliar o potencial dos solos do centro de treinamento do Instituto Regional da Pequena Agropecuária Apropriada - IRPA, em Juazeiro, na Bahia, tomando-se como base a caracterização morfológica dos mesmos.Resumo 855

Radial Growth of Qilian Juniper on the Northeast Tibetan Plateau and Potential Climate Associations

There is controversy regarding the limiting climatic factor for tree radial growth at the alpine treeline on the northeastern Tibetan Plateau. In this study, we collected 594 increment cores from 331 trees, grouped within four altitude belts spanning the range 3550 to 4020 m.a.s.l. on a single hillside. We have developed four equivalent ring-width chronologies and shown that there are no significant differences in their growth-climate responses during 1956 to 2011 or in their longer-term growth patterns during the period AD 1110–2011. The main climate influence on radial growth is shown to be precipitation variability. Missing ring analysis shows that tree radial growth at the uppermost treeline location is more sensitive to climate variation than that at other elevations, and poor tree radial growth is particularly linked to the occurrence of serious drought events. Hence water limitation, rather than temperature stress, plays the pivotal role in controlling the radial growth of Sabina przewalskii Kom. at the treeline in this region. This finding contradicts any generalisation that tree-ring chronologies from high-elevation treeline environments are mostly indicators of temperature changes