Cochonilhas ocorrentes em cafezais de Rondônia.

A cochonilha é uma praga que provoca grandes prejuízos à cafeicultura no Estado de Rondônia. Este trabalho reúne informações sobre as principais espécies encontradas em Rondônia, assim como os prejuízos causados, o controle biológico e o controle químico para combater esta praga.bitstream/item/24748/1/ct110-cochonilhas.pd

Crisomelídeos associados às culturas do feijão comum (Phaseolus vulgaris (L.) e melancia (Citrullus lanatus (Thunb.) Matsum & Nakail) em Rondônia.

O presente trabalho visou avaliar a diversidade de crisomelídeos-praga associados às culturas do feijão comum (Phaseolus vulgaris (L. ) e melancia [Citrullus lanatus (Thunb.) Matsum & Nakai], em Rondônia. A coleta de insetos foi realizada semanalmente. Os espécimes presentes foram observados em microscópio estereoscópico, contados e classificados em morfoespécies de acordo com as suas características morfológicas. Posteriormente, foi realizada a identificação das espécies. Dos 1876 insetos coletados, 957 foram encontrados na cultura do feijão e 919 na melancia. Os exemplares foram agrupados em 19 espécies pertencentes a duas subfamilias de Crysomelidae. Foram encontradas 13 espécies comuns às duas culturas. Na cultura da melancia a espécie dominante foi Acalymma sp1 (61%), enquanto que no feijão foi Cerotoma arcuata com abundância de 78%. A maior riqueza foi registrada na cultura do feijão que apresentou 17 espécies.bitstream/item/24658/1/bpd42-crisomelideos.pd

Induction of erythroferrone in healthy humans by micro-dose recombinant erythropoietin or high-altitude exposure

The erythropoietin (Epo)-erythroferrone (ERFE)-hepcidin axis coordinates erythropoiesis and iron homeostasis. While mouse studies have established that Epo-induced ERFE production represses hepcidin synthesis by inhibiting hepatic BMP/SMAD signaling, evidence for the role of ERFE in humans is limited. To investigate the role of ERFE as a physiological erythroid regulator in humans, we conducted two studies: first, 24 males received six injections of saline (placebo), recombinant Epo (rhEpo) 20 UI kg-1 (micro-dose) or 50 UI kg-1 (low-dose). Second, we quantified ERFE in 22 subjects exposed to high altitude (3800 m) for 15 hours. In the first study, total hemoglobin mass (Hbmass) increased after low- but not after micro-dose injections, when compared to placebo. Serum ERFE levels were enhanced by rhEpo, remaining higher than after placebo for 48 (micro-dose) or 72 hours (low-dose) post-injections. Conversely, hepcidin levels decreased when Epo and ERFE arose, before any changes in serum iron parameters occurred. In the second study, serum Epo and ERFE increased at high altitude. The present results demonstrate that in healthy humans ERFE responds to slightly increased Epo levels not associated with Hbmass expansion and down-regulates hepcidin in an apparently iron-independent way. Notably, ERFE flags micro-dose Epo, thus holding promise as novel anti-doping biomarker

Estratégias de controle para Boophilus Microplus no estado de Rondônia: resultados preliminares.

Esta publicação tem como objetivo mostrar as estratégias de controle para Boophilus microplus no estado de Rondônia

Atividade inseticida do óleo essencial de Schinus terebinthifolius Raddi sobre Acanthoscelides obtectus Say e Zabrotes subfasciatus Boheman.

Este trabalho teve como objetivo avaliar o efeito do óleo essencial de folhas de Schinus terebinthifolius sobre Acanthoscelides obtectus e Zabrotes subfasciatus. O óleo essencial foi obtido por arraste a vapor e dissolvido em acetona, nas diluições 10-2; 10-3; 10-4; 10-5; 10-6; 10-7 e 10-8 (v/v). Adicionou-se 1,0 mL destas soluções a placas de Petri de 9,0 cm de diâmetro, contendo papel de filtro esterilizado. Como controle, utilizou-se 1,0 mL de acetona. Após a evaporação da acetona, cinco insetos adultos foram colocados por placa, em quatro repetições, em delineamento inteiramente casualizado. Avaliou-se a mortalidade dos insetos após 24 e 48 horas. Obteve-se 100% de mortalidade de A. obtectus em 48 horas nas diluições do óleo 10-2; 10-3; 10-4; 10-5; 10-6; 10-7. No controle, a mortalidade atingiu 30% em 48 horas. Com relação a Z. subfasciatus, apenas as diluições 10-2 e 10-3 provocaram 100% de mortalidade, após 24 e 48 horas, enquanto no controle obteve-se 25% de mortalidade, em 48 horas. Este estudo evidencia a atividade inseticida do óleo essencial de S. terebinthifolius, o que sugere o seu potencial no controle dos insetos estudados.bitstream/CPAF-RO-2009-09/12172/1/bpd48_oleoessenciall.pd

Polarity in GaN and ZnO: Theory, measurement, growth, and devices

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Rev. 3, 041303 (2016) and may be found at https://doi.org/10.1063/1.4963919.The polar nature of the wurtzite crystalline structure of GaN and ZnO results in the existence of a spontaneous electric polarization within these materials and their associated alloys (Ga,Al,In)N and (Zn,Mg,Cd)O. The polarity has also important consequences on the stability of the different crystallographic surfaces, and this becomes especially important when considering epitaxial growth. Furthermore, the internal polarization fields may adversely affect the properties of optoelectronic devices but is also used as a potential advantage for advanced electronic devices. In this article, polarity-related issues in GaN and ZnO are reviewed, going from theoretical considerations to electronic and optoelectronic devices, through thin film, and nanostructure growth. The necessary theoretical background is first introduced and the stability of the cation and anion polarity surfaces is discussed. For assessing the polarity, one has to make use of specific characterization methods, which are described in detail. Subsequently, the nucleation and growth mechanisms of thin films and nanostructures, including nanowires, are presented, reviewing the specific growth conditions that allow controlling the polarity of such objects. Eventually, the demonstrated and/or expected effects of polarity on the properties and performances of optoelectronic and electronic devices are reported. The present review is intended to yield an in-depth view of some of the hot topics related to polarity in GaN and ZnO, a fast growing subject over the last decade

Social connections predict brain structure in a multidimensional free-ranging primate society

Reproduction and survival in most primate species reflects management of both competitive and cooperative relationships. Here, we investigated the links between neuroanatomy and sociality in free-ranging rhesus macaques. In adults, the number of social partners predicted the volume of the mid–superior temporal sulcus and ventral-dysgranular insula, implicated in social decision-making and empathy, respectively. We found no link between brain structure and other key social variables such as social status or indirect connectedness in adults, nor between maternal social networks or status and dependent infant brain structure. Our findings demonstrate that the size of specific brain structures varies with the number of direct affiliative social connections and suggest that this relationship may arise during development. These results reinforce proposed links between social network size, biological success, and the expansion of specific brain circuits

Six Months of Balloon Treatment does Not Predict the Success of Gastric Banding

BACKGROUND: We studied whether weight loss by intragastric balloon would predict the outcome of subsequent gastric banding with regard to weight loss and BMI reduction. METHODS: A prospective cohort of patients with a body mass index (BMI)>40 kg/m(2) received an intragastric balloon for 6 months followed by laparoscopic adjustable gastric banding (LAGB). Successful balloon-induced weight loss was defined as > or =10% weight loss after 6 months. Successful surgical weight loss was defined as an additional 15% weight loss in the following 12 months. Patients were divided in group A, losing > or =10% of their initial weight with 6 months' balloon treatment, and group B, losing <10% of their initial weight. RESULTS: In 40 patients (32 female, 8 male; age 36.6 yr, range 26-54), the mean BMI decreased from 46.5 to 40.5 kg/m(2) (P <0.001) after 6 months of balloon treatment and to 35.2 kg/m(2) (P <0.001) 12 months after LAGB. Group A (25 patients) and group B (15 patients) had a significant difference in BMI decrease, 12.4 vs 9.0 kg/m(2) (P <0.05), after the total study duration of 18 months. However, there was no difference in BMI reduction (4.7 kg/m(2) vs 5.8 kg/m(2)) in the 12 months after LAGB. 6 patients in group A lost > or =10% of their starting weight during 6 months balloon treatment as well as > or =15% 12 months following LAGB. 6 patients in group B lost <10% of their starting weight after 6 months of BIB, but also lost > or =15% 12 months following LAGB. CONCLUSION: Intragastric balloon did not predict the success of subsequent LAG

Analysis of a sprint ski race and associated laboratory determinants of world-class performance

This investigation was designed to analyze the time-trial (STT) in an international cross-country skiing sprint skating competition for (1) overall STT performance and relative contributions of time spent in different sections of terrain, (2) work rate and kinematics on uphill terrain, and (3) relationships to physiological and kinematic parameters while treadmill roller ski skating. Total time and times in nine different sections of terrain by 12 world-class male sprint skiers were determined, along with work rate and kinematics for one specific uphill section. In addition, peak oxygen uptake (VO2peak), gross efficiency (GE), peak speed (Vpeak), and kinematics in skating were measured. Times on the last two uphill and two final flat sections were correlated to overall STT performance (r = ~−0.80, P < 0.001). For the selected uphill section, speed was correlated to cycle length (r = −0.75, P < 0.01) and the estimated work rate was approximately 160% of peak aerobic power. VO2peak, GE, Vpeak, and peak cycle length were all correlated to STT performance (r = ~−0.85, P < 0.001). More specifically, VO2peak and GE were correlated to the last two uphill and two final flat section times, whereas Vpeak and peak cycle length were correlated to times in all uphill, flat, and curved sections except for the initial section (r = ~−0.80, P < 0.01). Performances on uphill and flat terrain in the latter part were the most significant determinants of overall STT performance. Peak oxygen uptake, efficiency, peak speed, and peak cycle length were strongly correlated to overall STT performance, as well as to performance in different sections of the race