State Of Roraima Research Articles

POST-HARVEST QUALITY IN THE ‘TOMMY ATKINS’ MANGO FOR DIFFERENT HARVEST TIMES

Determining the correct harvest time is essential for maintaining post-harvest fruit quality. The aim of the present study was to investigate the biochemical and physiological effect of three different harvest times on maintaining post-harvest quality in ‘Tommy Atkins’ mangoes from the state of Roraima, sold in markets in the city of Manaus. The treatments consisted of the different harvest times: control, harvested 90 days after anthesis; early harvest, harvested 70 days after anthesis; and late harvest, harvested 105 days after anthesis. At the end of the experimental period, mangoes harvested at 70 DAA were found to have a low carotenoid content, with the pulp unable to reach commercial maturity; the pulp had a high level of firmness, with the highest concentrations of vitamin C and phenolics, and the greatest antioxidant activity. When the mangoes were harvested at 105 DAA, the pulp had the least firmness and a sugar content very close to that of the early-harvested fruit, with lower concentrations of phenolics and vitamin C, and lower antioxidant activity. On the other hand, the fruit harvested at 90 DAA showed adequate physical resistance and acceptable results for sensory quality, functional compounds and antioxidant activity.

DETER Monitoring on Non-Forest Vegetation in the Brazilian Amazon

In this study, we present the initial results of the pilot project applying the Near Real-Time Deforestation Detection System (DETER), initially designed for monitoring forest ecosystems (DETER Amazon), recently expanded to surveil an area of approximately 280,000 km² of non-forest natural vegetation (NF) in the Brazilian Amazon. The system issues two types of alerts: 1) NF suppression alerts, categorized into three classes (suppression with exposed soil, suppression with cultivated area, and suppression by mining) and 2) burn scars, based on an adapted methodology from DETER Amazon and images with low spatial resolution (64 m) but high temporal resolution (two or three days to assess the entire biome). The pilot project period was from August 2022 to July 2023, with a total area of suppression alerts covering 575.22 km², predominantly composed of the NF suppression class with exposed soil, and 8,036.99 km² of burn scar areas. The majority of NF suppression alerts occurred in the states of Roraima, Mato Grosso, Rondônia, and Pará. Additionally, Amazonas and Amapá stood out among the states with a higher area of burn scar alerts. Savannas were the most affected non-forest physiognomies, with 5,037 km² (6.5%) of their area impacted by suppression and fire. Comparative analysis with other monitoring systems in the Amazon demonstrated the effectiveness of DETER NF in monitoring non-forest areas in the biome.

From transnational to trans-Indigenous: a critical analysis of the role of categorization and everyday coloniality in Indigenous mobilities

ABSTRACT Addressing the special issue’s focus on the contestation of state categories, this article investigates the categorization of Indigenous Peoples on the move and how they resist and re-exist these categorizations. Rooted in decolonial approaches from Latin America, we propose a trans-Indigenous conceptual framework for the analysis of such mobilities. Based on 15 semi-structured interviews with Indigenous people on the move conducted in the State of Roraima in Brazil and supplemented by an examination of relevant policy documents in the region, our arguments are built around the perspectives of Indigenous people on the move and their resistance. In outlining the contours of a trans-Indigenous conceptual framework, this article’s primary contributions lie in contextualizing Indigenous mobilities within a decolonial critique of the modern-colonial nation-state and human rights in Latin America that may lead toward an independent praxis related to territory, sovereignty, and mobilities.

Human outbreaks of a novel reassortant Oropouche virus in the Brazilian Amazon region.

The Brazilian western Amazon is experiencing its largest laboratory-confirmed Oropouche virus (OROV) outbreak, with more than 6,300 reported cases between 2022 and 2024. Here, we sequenced and analyzed 382 OROV genomes from human samples collected in Amazonas, Acre, Rondônia, and Roraima states, between August 2022 and February 2024, to uncover the origin and genetic evolution of OROV in the current outbreak. Genomic analyses revealed that the upsurge of OROV cases in the Brazilian Amazon coincides with spread of a novel reassortant lineage containing the M segment of viruses detected in the eastern Amazon region (2009-2018) and the L and S segments of viruses detected in Peru, Colombia, and Ecuador (2008-2021). The novel reassortant likely emerged in the Amazonas state between 2010 and 2014 and spread through long-range dispersion events during the second half of the 2010s. Phylodynamics reconstructions showed that the current OROV spread was mainly driven by short-range (< 2 km) movements consistent with the flight range of vectors. Nevertheless, a substantial proportion (22%) of long-range (> 10 km) OROV migrations were also detected, consistent with viral dispersion by humans. Our data provides a view of the unprecedented spread and evolution of OROV in Brazilian western Amazon region.

Spatiotemporal relationship between agriculture, livestock, deforestation, and visceral leishmaniasis in Brazilian legal Amazon

Visceral leishmaniasis (VL) is an urgent public health concern in Brazil. We evaluated the spatiotemporal distribution of VL to better understand the effects of economic activities related to agriculture, livestock, and deforestation on its incidence in the Brazilian Legal Amazon (BLA). The data on newly confirmed cases of VL in Brazilian municipalities from 2007 to 2020 were extracted from the Brazilian Notifiable Diseases Information System (SINAN) and analyzed. The data on agricultural production (planted area in hectares) and livestock (total number of cattle) were obtained from the Brazilian Institute of Geography and Statistics (IBGE), whereas deforestation data (in hectares) were obtained from the Amazon Deforestation Estimation Project (PRODES). SatScan and the local indicators of spatial association (LISA) were used to identify the spatial and temporal patterns of VL and its relationships with economic and environmental variables. The cumulative incidence rate was found to be 4.5 cases per 100,000 inhabitants. Based on the LISA results, areas with a high incidence of VL and deforestation were identified in the states of Roraima, Pará, and Maranhão. Strengthening deforestation monitoring programs and environmental enforcement actions can help implement public policies to control illegal deforestation and mitigate the socio-environmental vulnerability in the BLA. Therefore, areas identified in this study should be prioritized for controlling VL.

OCCUPATIONAL SAFETY IN CIVIL CONSTRUCTION OF THE STATE OF RORAIMA

This research highlights the safety of work in civil construction in the state of Roraima, with the objective of analyzing the safety practices adopted in the sector, identifying the main risks faced and assessing the effectiveness of implemented preventive measures. The methodology was based on the analysis of regulatory standards, local case studies and workers’ perception. The results showed that Roraima’s climate and geographical particularities impose additional security challenges, highlighting the importance of adapted practices and effective risk management. The conclusion points to the need to strengthen security culture in companies, with emphasis on workers’ education and training, as a way to reduce accidents and improve working conditions.

Association between hypercholesterolemia and isolated and simultaneous consumption of ultra-processed foods in older adults.

Consumption of ultra-processed foods (UPFs) is a risk factor for several cardiovascular diseases and mortality, with potential physiological mechanisms including elevated serum cholesterol levels. To analyze the association between hypercholesterolemia and the isolated and simultaneous consumption of UPFs in older adults. This is a cross-sectional epidemiological study conducted with 1322 Brazilian older adults (mean age of 70.4 years; 55.0% females) from the state of Roraima. The data was obtained from the Department of Epidemiological Surveillance of the State of Roraima. Hypercholesterolemia was diagnosed based on nosology criteria. Food consumption patterns were assessed using a nationally standardized instrument comprising four categories of UPFs. Binary logistic regression models were employed to explore potential associations. The prevalence of hypercholesterolemia was high (54.4%, 95% CI 51.7-56.6). While the simultaneous consumption of all UPFs types was lower (15.2%), over half of the older adults reported consuming at least one type of UPFs (71.8%). Isolated consumption of UPFs was associated with approximately twice the odds of hypercholesterolemia. Older adults who consumed two (OR 1.75, 95% CI 1.26-2.43), three (OR 2.28, 95% CI 1.58-3.29), or all four types of UPF (OR 6.65, 95% CI 4.35-9.44) had a higher likelihood of having hypercholesterolemia. Isolated consumption of UPFs is a risk factor for hypercholesterolemia, which can increase up to sixfold when older adults consume multiple UPFs simultaneously. Prioritizing nutritional education and raising awareness regarding the reduction of UPFs consumption is crucial.

Analysis of Notifications Received by Central de Transplantes in the State of Roraima from 2017 to 2021

Objectives: To analyze brain death (BD) notifications received by Central de Transplantes (CET) in the state of Roraima (RR) from 2017 to 2021. Methods: This is a cross-sectional, quantitative, and observational study, where all notifications received by CET from 2017 to 2021 were analyzed, resulting in 120 patients from health the following centers: Hospital Geral de Roraima (HGR), Hospital Confederação Nacional das Cooperativas Médicas (UNIMED), Hospital da Criança Santo Antônio (HCSA), Hospital das Clínicas (HC), and Hospital Lotty Íris (HLI). The data were collected from the center’s data management system and passed on to the collection form developed by the researcher. Results: This study analyzed 119 notifications after excluding one due to conflicting data. There was a predominance of males (58%), with traumatic brain injury being the most frequent cause of BD. Six organ harvestings were carried out, all at the HGR. This study found no significant associations between organ procurement and sex, age, place of hospitalization, and year. Conclusion: There are considerable challenges concerning organ donation in RR, with a low uptake rate over five years. Only the HGR successfully carried out organ harvesting, while other reporting hospitals were unsuccessful. Improvements are needed, highlighting the importance of more studies for a more in-depth data analysis.

Geotechnical field investigations to measure soil resistance on the Boa Vista/RR Western Bypass Highway and solution to embankments on soft soils

Among other challenges, embankments on soft soils have inspired geotechnical engineers, designers and executors to seek challenging solutions. Professor Márcio Almeida, one of the greatest experts on the subject, mentions that these challenges have already resulted in successes and memorable failures in works on soft soils. In general, soft soils are considered to be materials with high plasticity, in some cases rich in organic matter, with Nspt ≤ 4. Thus, brief considerations about soft soils are presented, as well as results with analysis and discussion of geotechnical studies carried out on the Boa Vista Western Bypass Highway (BR 174), in the state of Roraima, with the aim of determining the resistance of soils by means of in situ Vane Tests, in accordance with ABNT NBR 10905: 1989 (MB-3122). The studies consisted of carrying out “Geotechnical Field Investigations” on 11 sections of the highway. Considering the results, it was found that the layers of soft soil in the sections studied have “average” thicknesses that vary from section to section, with minimums close to 2.0 meters and maximums that exceed 6.0 meters. In addition, the existing embankments of the old road, located on the sections studied, indicate the presence of soils with low bearing capacity under the body of the embankments. In addition to the studies, solutions are proposed for the embankments on soils with low bearing capacity.

Intimate geographies of precarity: Water infrastructure and the normalisation of militarism in humanitarian intervention

The recent increase in Venezuelan migrants and refugees to Brazil has prompted a humanitarian response coordinated by multiple government agencies and inter/national organisations. This coordination effort sits under the umbrella of the Operation Welcome task force, in which the military is heavily involved. Situated in the northern state of Roraima, bordering Venezuela, this article explores one particular site of humanitarian care: a set of Water, Sanitation and Hygiene (WASH) facilities located in the capital city of Boa Vista. Here, I investigate the militaristic design and processes of the shower block, which is available to Venezuelan refugees and migrants who are living without adequate shelter. In doing so, this paper argues that the normalisation of militarism in humanitarian intervention (re)produces exclusion and precarity for those accessing spaces of care. By understanding the water infrastructure of the site as an infrastructure of containment, this research shines light on the everyday, often invisiblised implications of migration governance that occur at the micro-scale. In particular, it highlights the conditions of slow and symbolic violence that are embedded within the military-humanitarian response.

Population based screening for osteoporosis in men among 40 and 80 years in the brazilian state of Roraima"

The main objective of this study was to conduct population screening for osteoporosis in men between the ages of 40 and 80 in the Boa Vista, the capital of the Brazilian state of Roraima. The population study conducted in this study was basically based on the Fracture Risk Assessment Tool (FRAX®) nomogram model proposed by the World Health Organization (WHO). Specifically, the current work focuses on (i) analyzing the serum concentrations of calcium, vitamin D and total testosterone in relation to the risk of bone event by the FRAX® nomogram and (ii) correlating cardiovascular risk by calculating Framingham score with the FRAX® nomogram. This cohort, and cross-sectional study involves both quantitative and qualitative data obtained in the field from 380 patients. The data obtained were compared to the pre-existing data collected through different bibliography. For the sampling, a cluster method was utilized. Patients with immediate need of health services were referred to the state hospital of Coronel Mota, Boa Vista. This project was approved by the Ethical Committee (number: 50207115.7.0000.5301). While commuting to work or travel around found to be the major reason of the fractures, we observed that older people and people who were involved in physical activities inside a gymnasium had considerably high at risk of fractures. FRAX and TBS femur score (Trabecular Bone Score) was higher for people with fractures. People having lumbar osteopenia and femur osteopenia had higher risk of TBS femur fractures while people having lumbar osteoporosis had higher risk of TBS (femur and hip) as well as FRAX femur factures. All the data obtained in this study were analyzed using SPSS version 21 and a p value of ≤0.05 was considered as statistically significant. Key risk factors for fracture include increased age, physical activities in a gymnasium, lumbar and femur osteopenia and lumbar osteoporosis.

Uncovering the richness of Cerambycidae (Coleoptera) in the Amazon region: new species, notes, and new records

Summary Three new species from Brazil are described: Mionochroma complanatum n. sp. (Cerambycinae, Callichromatini), from Roraima; Plistonax albicans n. sp. (Lamiinae, Acanthoderini) from Acre; and Scythropopsis roraimensis n. sp. (Lamiinae, Acanthoderini) from Roraima. Three species are newly recorded for Brazil: Nealcidion elegans Monné & Monné, 2009 (Lamiinae, Acanthocinini), Paranyssicus quadriguttatus (Buquet, 1860) (Cerambycinae, Elaphidiini) and Penaherreraus pradosiae (Tavakilian & Peñaherrera-Leiva, 2003) (Lamiinae, Acanthoderini). Furthermore, the geographical distribution for 12 additional species is expanded in Brazil to include the Roraima State and one to the Acre State. Mecometopus cauaburi Martins & Galileo, 2011 (Cerambycinae, Clytini) is proposed as a junior-synonym of Mecometopus wallacei (White, 1855) (Cerambycinae, Clytini). Mionochroma vittatum (Fabricius, 1775) (Cerambycinae, Callichromatini) is redescribed and some morphological variations are pointed out.

Moral harassment: a portrait of northern brazil based on lawsuits

Purpose: To investigate moral harassment on northern Brazil through the lens of lawsuits. Design/methodology: Statistical analyses on lawsuits from 2012 to 2018 issued at Labor Court, 11th Region, which includes states of Amazonas and Roraima. It also provided a qualitative discussion, based on semi-structured interviews with main actors (judges, prosecutors, and lawyers). Findings: A representative volume of legal actions was found, signaling the presence of moral harassment in the region. There was a higher proportion of vertical harassment (management over employees), a large concentration in industry and banks, a predominance of men as harassers and great difficulty in proving the harassment. Originality/value: This article addresses the topic of moral harassment from a lens that is still little explored, lawsuits, considering a geographic delimitation without many studies – the northern region of Brazil. Theoretical/methodological contributions: The northern Brazil presents similar characteristics regarding moral harassment to those found in other regions of the country, reinforcing the understanding of a social phenomenon under the influence of the institutional environment. Practical implications: The findings reinforce the need to debate and review how reporting channels about moral harassment are structured in the country, as it is a phenomenon that is difficult to delimit and prove but has a profound impact on the lives of its victims.

Low Diversity and High Genetic Structure for Platonia insignis Mart., an Endangered Fruit Tree Species.

Platonia insignis is a fruit tree native to Brazil of increasing economic importance, with its pulp trading among the highest market values. This study aimed to evaluate the structure and genomic diversity of P. insignis (bacurizeiro) accessions from six locations in the Brazilian States of Roraima, Amazonas, Pará (Amazon biome), and Maranhão (Cerrado biome). A total of 2031 SNP markers were obtained using genotyping-by-sequencing (GBS), from which 625 outlier SNPs were identified. High genetic structure was observed, with most of the genetic variability (59%) concentrated among locations, mainly between biomes (Amazon and Cerrado). A positive and significant correlation (r = 0.85; p < 0.005) was detected between genetic and geographic distances, indicating isolation by distance. The highest genetic diversity was observed for the location in the Cerrado biome (HE = 0.1746; HO = 0.2078). The locations in the Amazon biome showed low genetic diversity indexes with significant levels of inbreeding. The advance of urban areas, events of burning, and expansion of agricultural activities are most probably the main factors for the genetic diversity reduction of P. insignis. Approaches to functional analysis showed that most of the outlier loci found may be related to genes involved in cellular and metabolic processes.

Could Aqueous Extract from Castor Plants be the Solution to Effectively Control the Pink Mealybug Nymphs?

Objective: To evaluate under laboratory conditions the potential of the leaf extract of the species Ricinus communis L. regarding its insecticidal activity on nymphs of the pink mealybug and determine the Lethal Concentration 50 (LC50). Theoretical reference: Maconellicoccus hirsutus is one of the key pests of several crops and has been diagnosed in more than 350 plant species. The species was reported for the first time in Brazil in 2010 in the State of Roraima, and has since spread to other Brazilian states causing considerable economic losses to the affected areas. Method: The castor bean leaf extract was tested on M. hirsutus insects with varying concentrations. Application was done directly using an airbrush connected to a calibrated compressor. Evaluation occurred at 24, 48, and 72-hour intervals post-application. Results and discussion: As the dosage of the extract was increased, a significant increase in the mortality rate of mealybugs was observed. The lethal concentration for 50 % of the M. hirsutus population (LC50) was calculated at 6.14%, with a confidence interval between 5.40 % and 7.02 % (m/v). Implications of the research: The research proposes a sustainable approach to controlling pink mealybug nymphs, using an aqueous extract of R. communis leaves. Originality/value: This article stands out for its innovation in exploring a sustainable approach to pest control, presenting an effective alternative to reduce dependence on chemical pesticides. This proposal is especially relevant to promote the adoption of more sustainable agricultural practices aligned with the principles of sustainable agriculture and providing benefits for both agricultural production and the environment.

Care management: reflections produced in teaching of nursing through image creation

Reflect on the management of nursing care from the creation of images by university nursing students. Exploratory-descriptive study with a qualitative approach carried out with twenty-four university nursing students in the state of Roraima. The strategy adopted for the production of data was the dramatic game and the findings analyzed by the content of the speeches. A table and a word cloud were produced containing the reflections and expressions on the inducing terms “care management” and “nurse”. Among the reflections related to care management are care-management inseparability, territorial planning, situational strategic planning, systematization of nursing care, leadership, human resources, material, physical, financial resources and conflict negotiation and administrative theories themselves. Regarding the nursing subject, the need for Nightingale's theoretical anchoring was highlighted to support nursing care in an evidence-based perspective. Finally, among the problems related to the role of nurses in the Unified Health System, the following were at the center of the discussion: humanistic vision, biomedical model, biopsychosocial model and education.

Taxonomic notes with update of records of Trigona (Dichrotrigona) Engel, 2021 (Hymenoptera: Apidae: Meliponini)

In this paper, we provide taxonomic notes for species of the Trigona (Dichrotrigona) Engel, 2021, with additional photographs. An identification key and a distribution map of the species of this subgenus is also provided here. We also update records of Trigona (Dichrotrigona) sesquipedalis Almeida, 1984 (Hymenoptera: Apidae: Meliponini) with the first records for the state of Roraima, Brazil.

Economic losses due to abscesses and/or vaccine granulomas in carcasses of cattle slaughtered in Roraima state, Brazil

Beef production has been growing in Roraima state, Brazil, in recent years. As a result, poor sanitary management and final product quality have caused economic losses due to inappropriate vaccine use. Thus, the present study aimed at evaluating the economic losses caused by vaccine reactions due to abscesses and/or granulomas in cattle carcasses from slaughterhouses under veterinary inspection in Roraima. The study was carried out from August 2017 to July 2018, in a slaughterhouse, evaluating cattle carcass injuries. A total of 277 carcasses with vaccine reactions were identified, 57.03% with granulomatous lesions and 42.97% abscessive lesions, representing an economic loss of R$ 2,105.20. In regard to lesion location, there was a predominance on the side of the neck (91.34%). There was a statistical difference between the type of injury and carcass weight (P&lt;0.05). The municipalities of Cantá, Caracaraí, Iracema and Rorainópolis showed a statistical difference in granuloma frequency for abscesses, demonstrating probable adequate vaccination management. The information obtained can be used to alert sanitary defense and public health services, through disease control programs for the state’s cattle herd. It is expected that these programs could improve final product quality, thereby reducing the economic losses of producers.

A proposal to evaluate the management of tuberculosis programs: a qualitative, evaluability assessment in the border region of Brazil and Venezuela.

This study aims to analyze the feasibility of building an evaluative model for the management of the Tuberculosis Prevention and Control Program in the State of Roraima, located on the border between Brazil and Venezuela. This is an evaluability assessment, a type of study used as a pre-evaluation of the development and implementation stages of a program, as well as throughout its execution. The study was developed in stages comprising the: (i) definition of the intervention to be analyzed and its objectives and goals; (ii) construction of the intervention logical model; (iii) screening of parties interested in the evaluation; (iv) definition of the evaluative questions; and (v) design of the evaluation matrix. Four priority components were defined for the evaluation: management of the organization and implementation of tuberculosis (TB) prevention and control policy; epidemiological surveillance management; care network management; and management of expected/achieved results. In this model, and based on theoretical references, we defined the necessary resources, activities, outputs, outcomes, and the expected impact for each of the policy management components. The management of the TB control program is feasible for evaluation based on the design of its components, the definition of structure and process indicators, and relevant results for the analysis of the management of TB prevention and control actions, as well as its influence on compliance with the agreed indicators and targets aiming at eradicating the disease by 2035.

Repetibilidade e número de colheitas para seleção de genótipos de castanheira-da-amazônia em sistema agroflorestal de cultivo

Abstract The objective of this work was to estimate the repeatability coefficients of variables related to fruit and nut production, the minimum number of crops required for genotype selection, and the permanent phenotypic correlation coefficients between variables in a cultivated population of Amazon nut. A total of 40 genotypes from seeds, belonging to an agroforestry system implemented in 1995, in the state of Roraima, Brazil, were evaluated during ten years for six variables related to fruit and nut production. The genetic-statistical analyses were performed using the maximum restricted likelihood and best linear unbiased prediction (REML/BLUP) method, based on the basic model of repeatability, without an experimental design, of the Selegen-REML/BLUP software. Genetic variability between genotypes and a moderate regularity in the repetition of the studied variables between different harvests were detected. The number of harvests required to reach a coefficient of determination of 80% ranged from seven, for the variables average nut weight per fruit and number of fruits per plant, to nine, for average nut weight. The correlation results indicate the possibility of indirect selection for nut production through the evaluation of the number and weight of fruits per plant.