Produção de variedades de banana tipo Prata resistentes à Sigatoka Negra no Acre.

A banana está entre as frutas mais consumidas e plantadas no Brasil. No Acre não é diferente, sendo a espécie mais plantada em todo o estado. No entanto, Sigatoka Negra causadora por Mycospharella fijiensis ainda causa grandes prejuízos para os produtores, reduzindo a produtividade, qualidade e vida útil dos plantios. Trabalho desenvolvido pela Embrapa Acre recomendou cinco variedades de banana resistentes à doença nas condições locais. O objetivo desse trabalho foi avaliar o comportamento e aspectos de produção destas variedades após 9 anos de sua recomendação para o Acre. Foram avaliadas as cinco variedades (Pacovan Ken, Japira, Maravilha, Thap Maeo e Preciosa)

Impactos ambientais do manejo agroecológico da caatinga no Rio Grande do Norte.

O objetivo deste trabalho foi avaliar os impactos ambientais do manejo agroecológico da caatinga, em unidades de produção familiar no Rio Grande do Norte, pelo método Ambitec de produção animal - dimensão ambiental, desenvolvido pela Embrapa Meio Ambiente. Foram avaliadas sete unidades de produção familiar, em quatro projetos de assentamentos de reforma agrária do Município de Apodi, RN. Os dados para o levantamento foram obtidos por meio de questionários aplicados aos representantes das unidades produtivas familiares, que atribuíram, a cada variável estudada, um valor que representou a alteração proporcionada pela implementação da tecnologia. Após a inserção dos coeficientes de alteração de cada variável dos indicadores por unidade de produção, o coeficiente de impacto foi automaticamente calculado por meio da planilha Ambitec. O manejo agroecológico da caatinga resultou num impacto ambiental positivo, e suas maiores contribuições foram relacionadas aos efeitos positivos dos seguintes indicadores: capacidade produtiva do solo, uso de insumos materiais, qualidade do produto e diminuição da emissão de poluentes à atmosfera. Dois indicadores geraram efeitos negativos: o uso de energia e o uso de recursos naturais. Pela superioridade dos benefícios gerados, o manejo agroecológico da caatinga é uma inovação tecnológica geradora de impactos ambientais positivos

Seven-coordinate Tb3+ complexes with 90% quantum yields: High-performance examples of combined singlet- and triplet-to-Tb3+ energy-transfer pathways

Seven-coordinate, pentagonal-bipyramidal (PBP) complexes [Ln(bbpen)Cl] and [Ln(bbppn)Cl], in which Ln = Tb3+ (products I and II), Eu3+ (III and IV), and Gd3+ (V and VI), with bbpen2- = N,N′-bis(2-oxidobenzyl)-N,N′-bis(pyridin-2-ylmethyl)ethylenediamine and bbppn2- = N,N′-bis(2-oxidobenzyl)-N,N′-bis(pyridin-2-ylmethyl)-1,2-propanediamine, were synthesized and characterized by single-crystal X-ray diffraction analysis, alternating-current magnetic susceptibility measurements, and photoluminescence (steady-state and time-resolved) spectroscopy. Under a static magnetic field of 0.1 T, the Tb3+ complexes I and II revealed single-ion-magnet behavior. Also, upon excitation at 320 nm at 300 K, I and II presented very high absolute emission quantum yields (0.90 ± 0.09 and 0.92 ± 0.09, respectively), while the corresponding Eu3+ complexes III and IV showed no photoluminescence. Detailed theoretical calculations on the intramolecular energy-transfer rates for the Tb3+ products indicated that both singlet and triplet ligand excited states contribute efficiently to the overall emission performance. The expressive quantum yields, QLnL, measured for I and II in the solid state and a dichloromethane solution depend on the excitation wavelength, being higher at 320 nm. Such a dependence was rationalized by computing the intersystem crossing rates (WISC) and singlet fluorescence lifetimes (τS) related to the population dynamics of the S1 and T1 levels. Thin films of product II showed high air stability and photostability upon continuous UV illumination, which allowed their use as downshifting layers in a green light-emitting device (LED). The prototypes presented a luminous efficacy comparable with those found in commercial LED coatings, without requiring encapsulation or dispersion of II in host matrixes. The results indicate that the PBP environment determined by the ethylenediamine (en)-based ligands investigated in this work favors the outstanding optical properties in Tb3+ complexes. This work presents a comprehensive structural, chemical, and spectroscopic characterization of two Tb3+ complexes of mixed-donor, en-based ligands, focusing on their outstanding optical properties. They constitute good molecular examples in which both triplet and singlet excited states provide energy to the Tb3+ ion and lead to high values of QLnL

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Mindfulness-based stress reduction or aerobics exercise for reducing burnout in medical residents- a study protocol for a phase III, open-label, multi-center, randomized controlled trial: The MINDER Collaborative group study

Background and objectives: Burnout results from chronic workplace stress leading to emotional exhaustion, negativity, and decreased professional efficiency. In the healthcare system, this can have consequences like increased medical errors, absenteeism, substance abuse, depression, and suicide among health professionals, adversely affecting patient care. Various individual-directed measures like the mindfulness-based stress reduction program (MBSR), one of the most studied and widely adopted techniques, and physical activity, like aerobics or sports, have shown to be effective against burnout. With this study, we intend to increase awareness regarding this public health issue among the residents and the faculty. Our aim is to define a successful intervention that can be incorporated as a yearly requirement for the completion of residency programs. Methodology: This study will be a phase III, multicentric, open-label, placebo (waiting list) controlled trial. Our sample size will be 720 residents sampled from 6 university hospitals from across the world, randomized into 3 parallel arms (1:1:1 ratio stratified according to site and specialty). Residents, diagnosed with burnout based on baseline Maslach Burnout Inventory score (MBI) and having no prior physical or mental health issues, will be included. The first group will undergo the MBSR program for 8 weeks, the second group will undergo a supervised aerobics program for 8 weeks, and the third group will be put into a waiting list for any of the interventions. The primary outcome will be the change in MBI scores after the intervention. The secondary outcomes will be the change in MBI score 3 months after the intervention, and changes in measures like heart rate, blood pressure, glycated hemoglobin, cortisol levels, quality of sleep and quality of life after the intervention and 3 months later. We also plan to do a subgroup analysis to see the difference based on specialty and gender. Study impact: The residency training period is considered one of the most stressful phases in medical education. Higher rates of burnout are noted in the residents, and this can negatively impact patient care and the progression of their careers. This trial will look at multiple interventions to combat burnout recruiting residents of different specialties in different work environments across the world. We hope to remove the stigma surrounding burnout in the healthcare system. This study will show the short and long term benefits of these interventions and would help us recommend their inclusion in various residency programs