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We use the Weather Research and Forecasting with Chemistry (WRF-Chem) model with new implementations of GOES-16 wildfire emissions and plume rise based on fire radiative power (FRP) to interpret aerosol observations during the 2019 NASA-NOAA FIREX-AQ field campaign and perform model evaluations. We compare simulated aerosol concentrations and optical properties against observations of black carbon aerosol from the NOAA Single Particle Soot Photometer (NOAA-SP2), organic aerosol from the CU High-Resolution Aerosol Mass Spectrometer (HR-AMS), and aerosol backscatter coefficients from the high-spectral-resolution lidar (HSRL) system. This study focuses on the Williams Flats fire in Washington, which was repeatedly sampled during four science flights by the NASA DC-8 (3–8 August 2019). The emissions and plume-rise methodologies are implemented following NOAA's operational High-Resolution Rapid Refresh coupled with Smoke (HRRR-Smoke) forecasting model. In addition, new GOES-16 FRP-based diurnal cycle functions are developed and incorporated into WRF-Chem. The FIREX-AQ observations represented a diverse set of sampled environments ranging from fresh/aged smoke from the Williams Flats fire to remnants of plumes transported over long distances. The Williams Flats fire resulted in significant aerosol enhancements during 3–8 August 2019, which were substantially underestimated by the standard version of WRF-Chem. The simulated black carbon (BC) and organic carbon (OC) concentrations increased between a factor of 92–125 (BC) and a factor of 28–78 (OC) with the new implementation compared to the standard WRF-Chem version. These increases resulted in better agreement with the FIREX-AQ airborne observations for BC and OC concentrations (particularly for fresh smoke sampling phases) and aerosol backscatter coefficients. The model still showed a low bias in simulating the aerosol loadings observed in aged plumes from Williams Flats. WRF-Chem with the FRP-based plume rise simulated similar plume heights to the standard plume-rise model in WRF-Chem. The simulated plume heights (for both versions) compared well with estimated plume heights using the HSRL measurements. Therefore, the better agreement with observations was mainly driven by the higher emissions in the FRP-based version. The model evaluations also highlighted the importance of accurately accounting for the wildfire diurnal cycle and including adequate representation of the underlying chemical mechanisms, both of which could significantly impact model forecasting performance.

Introduction Kleptomania is characterized by recurrent failure to resist the impulse to steal items of little value despite the ego-dystonic impulse and awareness of the wrongfulness of the act. Its prevalence is considered to be 0.6–0.8% in the general population and it is mostly comorbid with other psychiatric disorders. Kleptomania is a disabling disorder since patients suffer from emotional distress and impaired functioning. Objectives Although there is no cure, treatment may help prevent Kleptomania worsening and its negative consequences. We propose a review of the therapeutic approach to this disease. Methods Non-systematic literature review. Results No effective treatment is available for Kleptomania. Better efficacy can be achieved by combining psychotherapy with pharmacotherapy. Different treatment interventions can be selected based on clinical similarities to other disorders, co-occurring conditions or behavioral core features. Patients with significant mood symptoms may benefit from mood stabilizers or antidepressants. For patients with shoplift cravings and/or family history of substance use disorders, Naltrexone may reduce symptoms. Stimulants may be useful for Kleptomania bassociated with Attention Deficit Hyperactivity Disorder impulsivity. Benzodiazepines are effective in tension relief when used as adjuvants, at the beginning of treatment. Electroconvulsive therapy should be reserved for patients with treatment-resistant symptoms and comorbid depression. Cognitive-behavioral therapy has replaced Psychoanalytic and Psychodynamic psychotherapies. Conclusions Treatment helps decrease disruption to the person’s life, preventing the intense shame, legal, social, family, and occupational repercussions of Kleptomania. Although pharmaceutical and psychosocial interventions are available, we still lack specific treatments for Kleptomania. Disclosure No significant relationships.

Introduction Tourette’s syndrome is a neuropsychiatric disorder marked by motor and phonic tics frequently associated with psychiatric comorbidities, beginning in childhood. While most cases improve or resolve with age, some are refractory. Objectives To review new strategies for the management of Tourette’s Syndrome, following an outpatient clinical vignette. Methods We performed a review based on the PubMed® database. Results A 50-years-old female patient with a long-term outpatient psychiatric follow-up presented with motor tics appearing in adolescence, including winking and facial grimacing, as well as episodes of coprolalia. Over the years, she developed an anxiety disorder and social isolation. In addition to psychological therapy, pharmacological therapy had already been approached with the use alpha-adrenergic agonists and several antipsychotics, such as risperidone and aripiprazole, with the patient showing only partial response to pimozide. In Tourette’s syndrome, the therapy must be adequate to the patient’s individual needs. Emerging treatments for refractory cases, such as anticonvulsants, cannabinoids or antiglutamatergic drugs have been the target of several studies. Botulinum toxin injections are particularly effective in patients with focal motor tics and complex phonic tics. Non-pharmacological treatment options, such as electroconvulsive therapy and deep brain stimulation may prove effective in some cases. Conclusions A significant proportion of patients fail to respond to conventional strategies. Thus, new pharmacological and non-pharmacological therapies are on the horizon and may represent an important step in treatment algorithms for refractory cases in the future.

Introduction The development of an extrapyramidal syndrome (EPS) is assumed to be a potential and important consequence of organophosphate poisoning (OP). Even though its causal relationship is firmly established, the information available in the literature regarding the orientation to be given is scarce, and its approach remains shrouded in a significant degree of uncertainty. Catatonia, as a neuropsychiatric condition, may present a marked overlap with the set of extrapyramidal symptoms developed after OP. Does the overlap between the symptoms seen in catatonia and in EPS make differential diagnosis fundamental or does it have no relevance in relation to the approach to be established? Objectives To discuss the therapeutic approach to be implemented in the extrapyramidal symptoms resulting from OP and reflect on the overlap between catatonia and EPS. Methods Presentation of a clinical case and review of the literature. Results A 50-year-old woman with major depressive disorder developed a condition marked by exuberant extrapyramidal symptoms 3 weeks after OP. Significant stiffness, tremor, dysphagia and facial hypomimia were some of the symptoms observed. Therapy was started with amantadine 100mg daily, with complete resolution of the symptoms after 5 days. Follow-up revealed reversal of extrapyramidal symptoms, in the absence of any neuroimaging changes or any other neuropsychiatric manifestations. Conclusions The possible overlap between catatonia and EPS is remarkable. The two conditions, regardless of their differentiation, may benefit from an identical approach using dopaminergic drugs. The use of amantadine, even in low doses, may be an option in the rapid reversal of extrapyramidal symptoms resulting from OP. Disclosure No significant relationships.

Introduction Chronic pain is common, costly, and associated with significant disability and negative effects on well-being and mental health. The treatment is challenging, requiring a multidisciplinary approach. Acceptance and commitment therapy (ACT) aims to help patients in engaging in a flexible and persistent pattern of values-directed behavior while in contact with continuing pain and discomfort. Objectives To provide an updated review on the efficacy of ACT for the management of chronic pain. Methods We conducted a systematic review based on the PubMed® and EBSCO databases up to April 2020. Results Fifteen trials were included. The results were in favour of ACT in pain acceptance, functioning and pain intensity with small to large effect sizes. Few studies evaluated quality of life, but half of those were favourable to ACT. We also focused our analysis on ACT online interventions, considering the current demands due to the COVID-19 pandemic. Conclusions The current systematic review points in favour of ACT for the management of chronic pain conditions, though the studies included suffered from methodological limitations, which may have led to overestimated effects. Methodologically robust trials are required to further understand the clinical efficacy of ACT for chronic pain and which patients most benefit from this intervention.

Introduction Dissociative Amnesia remains an enigmatic and controversial entity. It is classically described as responsible for autobiographic amnesia associated with a traumatic event. Objectives To report a clinical case and review the literature. Methods We collected data from the patient’s clinical file with his informed consent. We conducted a non-systematic review of the literature. Results A 46-years-old patient presents to the emergency department for sudden global retrograde amnesia, with multiple domain amnestic syndrome (impairing verbal and visual memory, processing speed, mental flexibility, calculus, executive functions and language). He was initially admitted for a suspected infectious meningoencephalitis, which was not confirmed. Later an autoimmune encephalitis was pursued. Brain MRI showed a nonspecific left temporal and hipocampal hyperintensity and the EEG a mild left temporal dysfunction. The autoimmune encephalitis panel was negative and the formal diagnostic criteria were not met. The neurologic examination at discharge presented only with autobiographical and semantic amnesia. On the mental state examination, he presented with depressive symptoms reactive to the situation. There was no evident traumatic event apart from a promotion received the day before the amnesia started. He was prescribed escitalopram 10 mg/day. The amnesia was maintained at 9 months follow-up. Conclusions Our case report illustrates a case of amnesia without evident organic or psychogenic cause, assumed as a dissociative amnesia. Further studies are necessary to clarify the pathophysiology of this condition and develop specific treatments. Disclosure No significant relationships.

Introduction Psychosocial rehabilitation is a challenge in a society with demands unsuitable for those with severe mental illness (SMI). The Mental Health Department of Matosinhos Local Health Unity (MHD-MLHU) has developed a solidarity project aiming to evaluate and elaborate individualized rehabilitative responses with people with SMI, including people from the community motivated for solidarity initiatives. Objectives To describe a psychosocial rehabilitation project focused on community integration of people with SMI, considering needs and resources of the population, and to present the individualized rehabilitation plans carried out for people with SMI. Methods In January 2019, we began the home evaluation of people with SMI monitored in the MHD-MLHU. To develop solidary based play-occupational groups, we interviewed people from the community and from the common mental pathology outpatient clinic willing to participate. Results We present the description and evaluation of the psychosocial responses developed by the project. These responses include recreational-occupational groups, tailored to interests of each person with SMI, and using the community support group built for the purpose. These responses promote face-to-face activities, and enhance the destigmatization of SMI. The constraints resulting from the COVID-19 pandemic led to the creation of digital responses aimed at people with SMI and the community in general. Conclusions This experience has revealed the great potential of rehabilitating the community context of people with SMI, rather than just contemplating pre-existing structured responses. The pandemic created specific challenges but made the initiative even more relevant for SMI people and for promoting the mental health of the general population.

Introduction Perinatal death includes losses such as ectopic pregnancies, miscarriages, stillbirths and neonatal deaths. Perinatal loss has well documented negative effects on the health of the bereaved parents. Early pregnancy loss (EPL) is the spontaneous death of a fetus within the first 20 weeks of gestation. Objectives To describe a clinical case of disenfranchised grief following EPL and to review the literature. Methods We reviewed the clinical file of a patient presenting to the psychiatry outpatient clinic with disenfranchised grief. We conducted a non-systematic review on PubMed and Google Scholar. Results A 29-years-old female patient presents to the outpatient clinic with depressive symptoms and thoughts of death. The symptoms had begun 4 months earlier, following the loss of pregnancy at 14 weeks. She felt her grief was not accepted by her family and social network. Progressively, her relationships deteriorated, and she felt more and more isolated. She experienced marked difficulty in caring for her older child. Compared to other types of mourning, the loss of a child is associated with grief experience that is particularly severe and complicated. Despite the high prevalence of EPL, many women suffer in silence due to the common belief these losses are insignificant and may develop complicated grief. Conclusions Perinatal loss of an infant has the potential to have a large impact on the mental health of the bereaved parents. Literature on the efficacy of different interventions is still scarce. Further studies are necessary on prevention strategies and interventions for parents already suffering from complicated grief or depressive disorders. Disclosure No significant relationships.

Introduction Rates of cannabis use among pregnant women have been increasing. Psychiatrists may be required to provide counselling regarding marijuana use in pregnancy for their patients. Objectives To produce an up-to-date review of cannabis effects on pregnancy and the offspring. Methods We performed a non-systematic review of the literature apropos a clinical case. Results A 31-years-old, 22-weeks pregnant woman presented with severe anxiety, panic attacks and insomnia which she managed solely with cannabis. She had been previously treated with antidepressants and benzodiazepines with symptom remission but had suspended before her pregnancy without medical advice. She believed medication was more harmful to the baby than her cannabis use. There is little perception of risk concerning cannabis use in pregnant woman. Information on cannabis use is less likely to be obtained from healthcare providers than from anecdotal experiences, Internet searching and advice from friends and family. Prenatal use of cannabis has been associated with anaemia in the mother, whereas in the offspring it is associated with reduction in birth weight and greater likelihood of placement in intensive care units. There is insufficient evidence to support an association between marijuana use and any specific congenital abnormality, but also to demonstrate its safety. Conclusions It is essential for psychiatrists to have up-to-date knowledge of the effects of cannabis on the pregnancy and the offspring to properly counsel their patients. However, the effects of cannabis on maternal and foetal outcomes remain generally unknown. With rising numbers of female users, there is urgent need for further research. Disclosure No significant relationships.

Introduction Coronavirus disease 2019 (COVID-19) pandemic has had a negative impact for mental health. ULS-Guarda in cooperation with Portugal National Health Service, provided the population of the district of Guarda with a mental health helpline (MHHL). Objectives Provide a descriptive data analysis of the MHHL calls received between April 1st and September 20th of 2020. Methods The data was obtained through the filling out of questionnaires. It included fields for gender, age, the type of service provided, relation to COVID-19, symptoms displayed and the number calls made per patient. For the statistical analysis, Microsoft Excel TM was utilized. Results MHHL received 191 calls. The largest volume was received during April, which saw 116 instances of patients seeking the MHHL. The number of calls then tapered progressively throughout the following months. The services provided were split between psychiatric assistance, psychologic assistance, and the renovation of medical prescriptions, in 44%, 31% and 19% of the cases, respectively. The 101 patients who resorted to the MHHL were unevenly distributed in gender, being 74 female and 27 male individuals. Their ages were mostly between 50 and 69 years old. The most common symptoms were anxiety, depressed humor and insomnia, in 35%, 16% and 11% of the cases, respectively. Conclusions The largest influx of calls coincides with the home confinement period, and decreased alongside the relaxation of the confinement measures held. The MHHL had enough adherence to warrant consideration of it being an alternative means of healthcare access, especially in situations where physical access to healthcare is restricted.

Introduction Electroconvulsive therapy (ECT) presents itself as a highly effective therapeutic approach in various psychiatric conditions, especially affective disorders and catatonia. Although obsessive-compulsive disorder (OCD) is not an established indication for ECT, there are several positive results that have been replicated, giving us an account of its potential applicability. Objectives To emphasize the importance of defining predictors of response to ECT in OCD. Methods The authors’ clinical experience is combined with the review of clinical cases, available in the literature, related to the application of ECT in OCD. Results Personal or family history of affective pathology and obsessions of sexual content were identified as potential predictors of response to ECT in patients with obsessive and compulsive symptoms. Conclusions Although preliminary and based solely on case reports, the replicability of results should promote special attention to situations in which OCD is marked by particular characteristics that favor the response to ECT. In this way, it would be possible to prevent the dragged consumption of health resources and minimize the expected chronicity associated with this clinical condition.

Introduction The mental health impact of the COVID-19 pandemic is well documented. Portugal entered the emergency state on 19th march due to rising numbers of infected patients. The emergency state introduced regulatory measures that restricted people’s movements, applied a curfew, and closed most non-essential spaces and activities, such as shops and religious celebrations. Objectives To evaluate the rates of suicides during the emergency state in Portugal. Methods We obtained the number of probable suicides during 19th march and 2nd may 2020, 2019 and 2018 from SICO/eVM (Real Time Mortality Electronic Surveillance). This system is used for health planning in Portugal and provides provisory data which is updated every 10 minutes. ExcelÒ was used for the statistical analysis. Results During the Emergency State in Portugal there were 57 probable suicides. Comparing to the same period in 2018 and 2019, there were 62 and 70 probable suicides, respectively. Social isolation, anxiety, fear of contagion, chronic stress, and economic difficulties may lead to the development or exacerbation of depressive, anxiety, substance use, and other psychiatric disorders. Literature on suicides due to COVID-19 mention not only fear of infection, but also social isolation and distancing and economic recession as causes for suicide attempts and completions. Conclusions During the emergency state there was not an increase of probable suicides, compared to previous years. The greater vigilance of people’s movements may have deterred many attempts. However, policymakers and health care providers must be alert as the current psychosocial predispose to an increase in suicide rates. Disclosure No significant relationships.

Introduction In early 2020, governments started to implement different forms of public health measures, from physical distancing recommendations, to stay-at-home orders, to limit the propagation of COVID-19. Here we report the case of a 41-year-old woman, with a diagnosis of panic disorder. During the end of the lockdown, the patient presented psychopathological worsening, from her fear of Covid-19 infection, stemming from a heart failure disease and concerns regarding the hygiene and safety measures of those around her. Objectives Presentation of a clinical vignette. Methods Selection and analisis of clinical case and review of the literature using PubMed database. Results The COVID-19 pandemic and the measures adopted to prevent the spread of the disease had a huge impact on a personal, social, and economic level for the world population. The rise of fear and anxiety among people due to uncertainty about the disease are coupled with essential yet disruptive measures such as lockdowns and quarantines. The chronically ill population are especially vulnerable during such circumstances and require addressing their physical health and any psychological difficulties they might experience, being at higher risk of suffering physically from the pandemic’s disease as well as psychologically from the implemented countermeasures. Conclusions This vignette provides a case where a person’s psychiatric conditions are worsened due to the end of a pandemic lockdown, rather than the lockdown itself. Additional work should aim at comparing the experiences of the different countries affected by the pandemic in order to understand the size of the psychological impact, the potential risk and protective factors. Disclosure No significant relationships.

We present a characterization of the chemical composition of the atmosphere of the Brazilian Amazon rainforest based on trace gas measurements carried out during the South AMerican Biomass Burning Analysis (SAMBBA) airborne experiment in September 2012. We analyzed the observations of primary biomass burning emission tracers, i.e., carbon monoxide (CO), nitrogen oxides (NOx), ozone (O3), isoprene, and its main oxidation products, methyl vinyl ketone (MVK), methacrolein (MACR), and isoprene hydroxy hydroperoxide (ISOPOOH). The focus of SAMBBA was primarily on biomass burning emissions, but there were also several flights in areas of the Amazon forest not directly affected by biomass burning, revealing a background with a signature of biomass burning in the chemical composition due to long-range transport of biomass burning tracers from both Africa and the eastern part of Amazonia. We used the [MVK + MACR + ISOPOOH] ∕ [isoprene] ratio and the hydroxyl radical (OH) indirect calculation to assess the oxidative capacity of the Amazon forest atmosphere. We compared the background regions (CO 3] ∕ [CO]), to evaluate the impact of biomass burning emissions on the oxidative capacity of the Amazon forest atmosphere. We observed that biomass burning emissions disturb the isoprene oxidation reactions, especially for fresh plumes ([MVK + MACR + ISOPOOH] ∕ [isoprene]  =   7) downwind. The oxidation of isoprene is higher in fresh smoke plumes at lower altitudes (∼ 500 m) than in aged smoke plumes, anticipating near the surface a complex chain of oxidation reactions which may be related to secondary organic aerosol (SOA) formation. We proposed a refinement of the OH calculation based on the sequential reaction model, which considers vertical and horizontal transport for both biomass burning regimes and background environment. Our approach for the [OH] estimation resulted in values on the same order of magnitude of a recent observation in the Amazon rainforest [OH] ≅ 106 (molecules cm−3). During the fresh plume regime, the vertical profile of [OH] and the [MVK + MACR + ISOPOOH] ∕ [isoprene] ratio showed evidence of an increase in the oxidizing power in the transition from planetary boundary layer to cloud layer (1000–1500 m). These high values of [OH] (1.5 × 106 molecules cm−3) and [MVK + MACR + ISOPOOH] ∕ [isoprene] (7.5) indicate a significant change above and inside the cloud decks due to cloud edge effects on photolysis rates, which have a major impact on OH production rates.

Idiopathic pulmonary fibrosis (IPF) is a progressive and fatal lung disease that up to now has been associated with a poor prognosis. However, the results of the INPULSIS and ASCEND trials and the approval of nintedanib and pirfenidone have marked the beginning of a new era for IPF patients. Questions remain, however. Should these drugs be used earlier? What effect will they have on more severe disease? Will their effects last beyond the trial period? This manuscript is the outcome of a multidisciplinary meeting between pulmonology, radiology, and pathology clinicians on the use of antifibrotic agents in IPF. In our opinion, the existing data show that pirfenidone and nintedanib slow functional decline in early stages of disease. These drugs also appear to result in therapeutic benefits when administered to patients with advanced disease at diagnosis and maintain effective over time. The data also suggest that continuing antifibrotic therapy after disease progression may confer benefits, but more evidence is needed. Early diagnosis and treatment are crucial for reducing functional decline, slowing disease progression, and improving quality of life. Keywords: Idiopathic pulmonary fibrosis, Interstitial lung disease, Nintedanib, Pirfenidone

This study aims to evaluate the effectiveness of a modified architecture of convolutional neural network (CNN) VGG19 for detecting fires and changes in land use and land cover classification (LULC). Remote sensing data from the Landsat 8 Operational Land Imagery (OLI) satellite was used to collect images from two distinct regions, one of which was used to obtain a dataset containing 1000 labeled images, and the other region was used to perform inference and verify the generalization of the model in an area with a high annual occurrence of fires. Analyses were conducted using a time series of normalized difference vegetation index (NDVI) and complementary cumulative distribution function (CCDF), to determine the potential for analysis in that area and define the periods of burning, pre-burning and post-burning. The VGG19 architecture was modified to maintain the input sizes of the images, resulting in a significant increase of 20.90 percentage points in the F1 score compared to the original architecture, as well as a 68.76% reduction in convergence time. In addition, the Gradient-weighted Class Activation Mapping (Grad-CAM) technique was used to improve the interpretability of the model at the moment of inference. The proposed methodology offers an approach for detecting burns by altering the LULC classification, and the modified VGG19 showed superior results.

Abstract Background Neisseria gonorrhoeae (Ng) causes the sexually transmitted disease gonorrhoea. There are no vaccines and infections are treated principally with antibiotics. However, gonococci rapidly develop resistance to every antibiotic class used and there is a need for developing new antimicrobial treatments. In this study we focused on two gonococcal enzymes as potential antimicrobial targets, namely the serine protease L,D-carboxypeptidase LdcA (NgO1274/NEIS1546) and the lytic transglycosylase LtgD (NgO0626/NEIS1212). To identify compounds that could interact with these enzymes as potential antimicrobials, we used the AtomNet virtual high-throughput screening technology. We then did a computational modelling study to examine the interactions of the most bioactive compounds with their target enzymes. The identified compounds were tested against gonococci to determine minimum inhibitory and bactericidal concentrations (MIC/MBC), specificity, and compound toxicity in vitro. Results AtomNet identified 74 compounds that could potentially interact with Ng-LdcA and 84 compounds that could potentially interact with Ng-LtgD. Through MIC and MBC assays, we selected the three best performing compounds for both enzymes. Compound 16 was the most active against Ng-LdcA, with a MIC50 value

Landscape fires produce smoke containing a very wide variety of chemical species, both gases and aerosols. For larger, more intense fires that produce the greatest amounts of emissions per unit time, the smoke tends initially to be transported vertically or semi-vertically close by the source region, driven by the intense heat and convective energy released by the burning vegetation. The column of hot smoke rapidly entrains cooler ambient air, forming a rising plume within which the fire emissions are transported. The characteristics of this plume, and in particular the height to which it rises before releasing the majority of the smoke burden into the wider atmosphere, are important in terms of how the fire emissions are ultimately transported, since for example winds at different altitudes may be quite different. This difference in atmospheric transport then may also affect the longevity, chemical conversion, and fate of the plumes chemical constituents, with for example very high plume injection heights being associated with extreme long-range atmospheric transport. Here we review how such landscape-scale fire smoke plume injection heights are represented in larger-scale atmospheric transport models aiming to represent the impacts of wildfire emissions on component of the Earth system. In particular we detail (i) satellite Earth observation data sets capable of being used to remotely assess wildfire plume height distributions and (ii) the driving characteristics of the causal fires. We also discuss both the physical mechanisms and dynamics taking place in fire plumes and investigate the efficiency and limitations of currently available injection height parameterizations. Finally, we conclude by suggesting some future parameterization developments and ideas on Earth observation data selection that may be relevant to the instigation of enhanced methodologies aimed at injection height representation.

This paper investigates the physical and chemical characteristics of aerosols at ground level at a site heavily impacted by biomass burning. The site is located near Porto Velho, Rondônia, in the southwestern part of the Brazilian Amazon rainforest, and was selected for the deployment of a large suite of instruments, among them an Aerosol Chemical Speciation Monitor. Our measurements were made during the South American Biomass Burning Analysis (SAMBBA) field experiment, which consisted of a combination of aircraft and ground-based measurements over Brazil, aimed to investigate the impacts of biomass burning emissions on climate, air quality, and numerical weather prediction over South America. The campaign took place during the dry season and the transition to the wet season in September/October 2012. During most of the campaign, the site was impacted by regional biomass burning pollution (average CO mixing ratio of 0.6 ppm), occasionally superimposed by intense (up to 2 ppm of CO), freshly emitted biomass burning plumes. Aerosol number concentrations ranged from ~1000 cm−3 to peaks of up to 35 000 cm−3 (during biomass burning (BB) events, corresponding to an average submicron mass mean concentrations of 13.7 μg m−3 and peak concentrations close to 100 μg m−3. Organic aerosol strongly dominated the submicron non-refractory composition, with an average concentration of 11.4 μg m−3. The inorganic species, NH4, SO4, NO3, and Cl, were observed, on average, at concentrations of 0.44, 0.34, 0.19, and 0.01 μg m−3, respectively. Equivalent black carbon (BCe) ranged from 0.2 to 5.5 μg m−3, with an average concentration of 1.3 μg m−3. During BB peaks, organics accounted for over 90% of total mass (submicron non-refractory plus BCe), among the highest values described in the literature. We examined the ageing of biomass burning organic aerosol (BBOA) using the changes in the H : C and O : C ratios, and found that throughout most of the aerosol processing (O : C ≅ 0.25 to O : C ≅ 0.6), no remarkable change is observed in the H : C ratio (~1.35). Such a result contrasts strongly with previous observations of chemical ageing of both urban and Amazonian biogenic aerosols. At higher levels of processing (O : C > 0.6), the H : C ratio changes with a H : C / O : C slope of −0.5, possibly due to the development of a combination of BB (H : C / O : C slope = 0) and biogenic (H : C /O :C slope =−1) organic aerosol (OA). An analysis of the ΔOA /ΔCO mass ratios yields very little enhancement in the OA loading with atmospheric processing, consistent with previous observations. These results indicate that negligible secondary organic aerosol (SOA) formation occurs throughout the observed BB plume processing, or that SOA formation is almost entirely balanced by OA volatilization. Positive matrix factorization (PMF) of the organic aerosol spectra resulted in three factors: fresh BBOA, aged BBOA, and low-volatility oxygenated organic aerosol (LV-OOA). Analysis of the diurnal patterns and correlation with external markers indicates that during the first part of the campaign, OA concentrations are impacted by local fire plumes with some chemical processing occurring in the near-surface layer. During the second part of the campaign, long-range transport of BB plumes above the surface layer, as well as potential SOAs formed aloft, dominates OA concentrations at our ground-based sampling site. This manuscript describes the first ground-based deployment of the aerosol mass spectrometry at a site heavily impacted by biomass burning in the Amazon region, allowing a deeper understanding of aerosol life cycle in this important ecosystem.

Due to the need to replace lubricants derived from polluting processes and inputs, bioprocesses and raw materials such as vegetable oils have been used for the production of biolubricants. In this study, the synthesis of esters with lubricating potential was conducted through enzymatic hydroesterification. For complete hydrolysis of Moringa oleifera Lam. seed oil (MOSO), Candida rugosa lipase was applied under conditions already established in the literature. Subsequently, the synthesis of esters of industrial interest was carried out through esterification using a lipase (Eversa Transform 2.0 (ET2.0)) immobilized by different functional groups on heterofunctional silica-based supports: epoxy-silica (Epx), glyoxyl-silica (Gly), and amino-glutaraldehyde-silica (AmG). Two drying pre-treatment techniques were used to improve the immobilization yield of the ET2.0 lipase on different pre-treated supports: evaporation in a drying oven (with improvements ranging from 15% to 46%) and pressure difference in a desiccator (with improvements ranging from 24% to 43%). The immobilizing supports and biocatalysts were characterized to verify their morphologies, structures, and topographies. Deconvolution was performed to evaluate the secondary structure of the ET2.0 lipase and showed increases in the α-helix and β-sheet regions for all biocatalysts after the immobilization process. In a solvent-free medium, the AmG-70h support performed best in the esterification reaction, at around 90% conversion, with a load of 1.65 mg of protein in the reaction. Moreover, it obtained a productivity around 4.45 times that of free ET2.0 lipase, maintaining its original activity until the fourth cycle. This work offers the opportunity to understand and synthesize new biocatalysts with a low-cost genetically modified lipase using a renewable raw material, opening new possibilities to fill gaps that still exist in the use of lipases for biolubricant production.

Laboratorial diagnosis of tegumentary leishmaniasis (TL) is hampered by variable sensitivity and/or specificity of the tests, which are still hampered by blood́ invasive collection. In this context, in the present study, we develop a serum- and urine-based ELISA to TL diagnoses. A recombinant protein (rLiHyA), which was previously showed to be antigenic for the disease, as well as a B-cell epitope produced as synthetic peptide and a Leishmania antigenic extract (SLA), were used as antigens. A total of paired 205 urine and serum samples were used, which were comprised by samples from cutaneous (n = 30) and mucosal (n = 30) leishmaniasis patients, as well as from healthy individuals living in endemic region of disease (n = 45), of patients with Chagas disease (n = 30), leprosy (n = 35), malaria (n = 15) or HIV-infected (n = 20). Results showed that serum-based ELISA presented sensitivity of 24.0 %, 100 % and 41.0 %, when SLA, rLiHyA and synthetic peptide were used as antigens, and specificity of 98.4 %, 98.4 % and 98.4 %, respectively. The area under the curve (AUC) was calculated and results were 0.74, 1.0, and 0.71, respectively, when SLA, rLiHyA and synthetic peptide were used as antigens. Performing an urine-based ELISA, sensitivity was 28.0 %, 100 % and 75.0 %, respectively, when SLA, rLiHyA, and synthetic peptide were used, while specificity values were of 98.4 %, 98.4 % and 98.4 %, respectively. In addition, the AUC values were 0.82, 1.0, and 0.94, respectively. A significant drop in specific antibodies levels in both patientś serum and urine samples was found six months after treatment, suggesting a prognostic role of rLiHyA for TL. In conclusion, preliminary data suggest the potential of use patient urine to TL diagnoses.

Background. Respiratory Bronchiolitis (RB), described by Niewoehner et al in 1974, is a common finding in heavy smokers and is characterised by the presence of pigmented macrophages within respiratory bronchioles and adjacent alveoli. In the 1980s, Myers et al described RB associated with interstitial lung disease (RBILD), which is a rare entity expressed as an amplified respiratory bronchiolitis in response to cigarette smoke. Methods. The authors studied a group of 8 patients with biopsy-proven RBILD diagnosed within the last five years, and assessed epidemiological data, clinical and imaging features, lung function tests, bronchoalveolar lavage findings, therapeutic approaches and clinical evolution. Results and Conclusions. The most difficult differential diagnosis is between RBILD and Desquamative Interstitial Pneumonia (DIP), which seems to suggest that these disorders are either end of the same spectrum, although the authors claim that there are some clinical, morphological and prognostic distinctions. The diagnosis of RBILD requires an appropriate clinical setting (including smoking habits), characteristic image findings (like ground glass shadowing and centrilobular nodules), and Bronchoalveolar Lavage (BAL) data to exclude other diagnosis. Pathological confirmation may also be important, not only to exclude more adverse interstitial lung disease, such as idiopathic pulmonary fibrosis, but also, as in the eight cases presented, to illustrate some specific features such as the prevalence of lymphocytosis in BAL.

We present the results of airborne measurements of carbon monoxide (CO) and aerosol particle number concentration (CN) made during the Balanço Atmosférico Regional de Carbono na Amazônia (BARCA) program. The primary goal of BARCA is to address the question of basin-scale sources and sinks of CO2 and other atmospheric carbon species, a central issue of the Large-scale Biosphere-Atmosphere (LBA) program. The experiment consisted of two aircraft campaigns during November–December 2008 (BARCA-A) and May–June 2009 (BARCA-B), which covered the altitude range from the surface up to about 4500 m, and spanned most of the Amazon Basin. Based on meteorological analysis and measurements of the tracer, SF6, we found that airmasses over the Amazon Basin during the late dry season (BARCA-A, November 2008) originated predominantly from the Southern Hemisphere, while during the late wet season (BARCA-B, May 2009) low-level airmasses were dominated by northern-hemispheric inflow and mid-tropospheric airmasses were of mixed origin. In BARCA-A we found strong influence of biomass burning emissions on the composition of the atmosphere over much of the Amazon Basin, with CO enhancements up to 300 ppb and CN concentrations approaching 10 000 cm−3; the highest values were in the southern part of the Basin at altitudes of 1–3 km. The ΔCN/ΔCO ratios were diagnostic for biomass burning emissions, and were lower in aged than in fresh smoke. Fresh emissions indicated CO/CO2 and CN/CO emission ratios in good agreement with previous work, but our results also highlight the need to consider the residual smoldering combustion that takes place after the active flaming phase of deforestation fires. During the late wet season, in contrast, there was little evidence for a significant presence of biomass smoke. Low CN concentrations (300–500 cm−3) prevailed basinwide, and CO mixing ratios were enhanced by only ~10 ppb above the mixing line between Northern and Southern Hemisphere air. There was no detectable trend in CO with distance from the coast, but there was a small enhancement of CO in the boundary layer suggesting diffuse biogenic sources from photochemical degradation of biogenic volatile organic compounds or direct biological emission. Simulations of CO distributions during BARCA-A using a range of models yielded general agreement in spatial distribution and confirm the important contribution from biomass burning emissions, but the models evidence some systematic quantitative differences compared to observed CO concentrations. These mismatches appear to be related to problems with the accuracy of the global background fields, the role of vertical transport and biomass smoke injection height, the choice of model resolution, and reliability and temporal resolution of the emissions data base.

The EU HIBISCUS project consisted of a series of field campaigns during the intense convective summers in 2001, 2003 and 2004 in the State of São Paulo in Brazil. Its objective was to investigate the impact of deep convection on the Tropical Tropopause Layer (TTL) and the lower stratosphere by providing a new set of observational data on meteorology, tracers of horizontal and vertical transport, water vapour, clouds, and chemistry in the tropical Upper Troposphere/Lower Stratosphere (UT/LS). This was achieved using short duration research balloons to study local phenomena associated with convection over land, and long-duration balloons circumnavigating the globe to study the contrast between land and oceans. Analyses of observations of short-lived tracers, ozone and ice particles show strong episodic local updraughts of cold air across the lapse rate tropopause up to 18 or 19 km (420–440 K) in the lower stratosphere by overshooting towers. The long duration balloon and satellite measurements reveal a contrast between the composition of the lower stratosphere over land and oceanic areas, suggesting significant global impact of such events. The overshoots are shown to be well captured by non-hydrostatic meso-scale Cloud Resolving Models indicating vertical velocities of 50–60 m s−1 at the top of the Neutral Buoyancy Level (NBL) at around 14 km, but, in contrast, are poorly represented by global Chemistry-Transport Models (CTM) forced by Numerical Weather Forecast Models (NWP) underestimating the overshooting process. Finally, the data collected by the HIBISCUS balloons have allowed a thorough evaluation of temperature NWP analyses and reanalyses, as well as satellite ozone, nitrogen oxide, water vapour and bromine oxide measurements in the tropics.

In this study, we evaluate the ability of the BRAMS (Brazilian Regional Atmospheric Modeling System) mesoscale model compared to ECMWF global analysis to simulate the observed vertical variations of water vapour in the tropical upper troposphere and lower stratosphere (UTLS). The observations are balloon-borne measurements of water vapour mixing ratio and temperature from micro-SDLA (Tunable Diode Laser Spectrometer) instrument. Data from two balloon flights performed during the 2004 HIBISCUS field campaign are used to compare with the mesoscale simulations and to the ECMWF analysis. The observations exhibit fine scale vertical structures of water vapour of a few hundred meters height. The ECMWF vertical resolution (~1 km) is too coarse to capture these vertical structures in the UTLS. With a vertical resolution similar to ECMWF, the mesoscale model performs better than ECMWF analysis for water vapour in the upper troposphere and similarly or slightly worse for temperature. The BRAMS model with 250 m vertical resolution is able to capture more of the observed fine scale vertical variations of water vapour compared to runs with a coarser vertical resolution. This is mainly related to: (i) the enhanced vertical resolution in the UTLS and (ii) to the more detailed microphysical parameterization providing ice supersaturations as in the observations. In near saturated or supersaturated layers, the mesoscale model predicted relative humidity with respect to ice saturation is close to observations provided that the temperature profile is realistic. For temperature, the ECMWF analysis gives good results partly attributed to data assimilation. The analysis of the mesoscale model results showed that the vertical variations of the water vapour profile depends on the dynamics in unsaturated layer while the microphysical processes play a major role in saturated/supersaturated layers. In the lower stratosphere, the ECMWF model and the BRAMS model give very similar water vapour profiles that are significantly drier than micro-SDLA measurements. This similarity comes from the fact that BRAMS is initialised using ECMWF analysis and that no mesoscale process acts in the stratosphere leading to no modification of the BRAMS results with respect to ECMWF analysis.

The current study aimed to compare the influence of hydroethanolic treatment and enzymatic hydrolysis on the antioxidant activity of cashew apple bagasse extracts. A three-level Box-Behnken experimental design was applied to optimize the operational parameters. Hydrolysis parameters, including enzyme concentration (10 %, 15 % and 20 % respect to dry matter), solvent/sample ratio (1:1, 2:1 and 3:1) and sample granulometry were investigated. Hydroalcoholic extraction parameters were pH (3.0; 4.5 and 6.0), solvent/sample ratio (1:1, 2:1 and 3:1) and ethanol concentration (30 %, 50 % and 70 %). Based in preliminary hydrolysis data, the commercial cellulase Celluclast® 1.5 L (Novozymes) was selected. The antioxidant activity of cashew apple bagasse extracts were evaluated by ABTS·+ radicals method. Total phenolic content (TPC) was also determined using a Folin-Ciocalteu assay. Statistical results showed that the solvent/sample ratio was the only factor which influenced the antioxidant activity improvement, for both treatments. However, even when ABTS·+ quantification was higher, the TPC did not increase so expressively. This suggests that the availability of phenolic compounds were low, but the ones which were released from the cashew bagasse cell walls presented a meaningful antioxidant capacity.

The aim of this work is to study the local impact on the upper troposphere/lower stratosphere air composition of an extreme deep convective system. For this purpose, we performed a simulation of a convective cluster composed of many individual deep convective cells that occurred near Bauru (Brazil). The simulation is performed using the 3-D mesoscale model RAMS coupled on-line with a chemistry model. The comparisons with meteorological measurements show that the model produces meteorological fields generally consistent with the observations. The present paper (part I) is devoted to the analysis of the ozone precursors (CO, NOx and non-methane volatile organic compounds) and HOx in the UTLS. The simulation results show that the distribution of CO with altitude is closely related to the upward convective motions and consecutive outflow at the top of the convective cells leading to a bulge of CO between 7 km altitude and the tropopause (around 17 km altitude). The model results for CO are consistent with satellite-borne measurements at 700 hPa. The simulation also indicates enhanced amounts of NOx up to 2 ppbv in the 7–17 km altitude layer mainly produced by the lightning associated with the intense convective activity. For insoluble non-methane volatile organic compounds, the convective activity tends to significantly increase their amount in the 7–17 km layer by dynamical effects. During daytime in the presence of lightning NOx, this bulge is largely reduced in the upper part of the layer for reactive species (e.g. isoprene, ethene) because of their reactions with OH that is increased on average during daytime. Lightning NOx also impacts on the oxydizing capacity of the upper troposphere by reducing on average HOx, HO2, H2O2 and organic hydroperoxides. During the simulation time, the impact of convection on the air composition of the lower stratosphere is negligible for all ozone precursors although several of the simulated convective cells nearly reach the tropopause. There is no significant transport from the upper troposphere to the lower stratosphere, the isentropic barrier not being crossed by convection. The impact of the increase of ozone precursors and HOx in the upper troposphere on the ozone budget in the LS is discussed in part II of this series of papers.

Abstract Fish consumption is the main path of human exposure to Hg and may represent a risk to public health, even with low Hg concentrations in fish, if consumption rates are high. This study quantifies, for the first time, the Hg concentrations in nine most commercialized species in the São Luís (MA) fish market, where fish consumption is high, and estimates human exposure. Average Hg concentrations were highest in carnivorous species, yellow hake (Cynoscion acoupa) (0.296 mg kg-1), the Atlantic croaker (Micropogonias undulatus) (0.263 mg kg-1), whereas lowest concentrations were recorded in iliophagous Mullets (Mugil curema) (0.021 mg kg-1) and the Shorthead drum Larimus breviceps (0.025 mg kg-1). Significant correlations were observed between Hg concentrations and fish length in two species: the Coco-Sea catfish (Bagre bagre) and the Atlantic bumper (Chloroscombrus crysurus), but not in the other species, since they presented relatively uniform size of individuals and/or a small number of samples. Risk coefficients, despite the relatively low Hg concentrations, suggest that consumers should limit their consumption of Yellow hake and Atlantic croaker, as they can present some risk to human health (EDI > RfD and THQ > 1), depending on the frequency of their consumption and the consumer’s body weight.

à ainda controverso o papel da Lavagem Broncoalveolar (LBA) no diagnóstico de Sarcoidose. O recente Statement on Sarcoidosis defende a posição de U. Costabel de que uma relação CD4/CD8na LBA superior a 3,5 se traduz por uma alta especificidade mesmo na ausência de biópsia transbrônquica conclusiva. à objectivo dos autores verificar se este valor de 3,5 se correlaciona com padrões inflamatórios específicos, achados imagiológicos ou funcionais característicos, ou estadios diferentes da doença. Procedeu-se a uma análise retrospectiva de 295 broncofibroscopias realizadas em 268 doentes com Doença Intersticial Pulmonar suspeita, entre Janeiro de 2000 e Junho de 2002, com confirmação histológica de Sarcoidose em 46 casos. Dividiram-se em dois grupos conforme o cut off de 3,5 - Grupo I (GI) 3,5 â e avaliaram-se os seguintes parâmetros: marcadores inflamatórios, dados imagiológicos incluindo estadio radiológico, testes de função ventilatória e envolvimento sistémico.Dos resultados obtidos, verificou-se que 20 doentes se incluíam no GI e 26 no GII, não havendo diferenças significativas quanto à distribuição por sexo e idade. No entanto, quanto ao estadio radiológico, objectivou-se uma predominância de Estadio O no GI e Estadio II no GII. O Cintigrama com Gálio revelou hiperfixação em 85% dos doentes nos dois grupos e a maioria dos Estudos Funcionais Ventilatórios foram normais, havendo, no entanto, uma maior percentagem de doentes com diminuição da DLCO no GI. A Tomografia Computorizada, quando realizada, demonstrou envolvimento intersticial do pulmão em 40% dos doentes nos dois grupos. Envolvimento sistémico foi confirmado em 25% no GI e 30,8% no GII.Não houve diferenças significativas entre os dois grupos. No entanto, os autores colocam a questão se uma relação CD4/CD8 baixa não poderá estar relacionada com um estadio mais precoce da doença (predominância de Estadio O) ou, pelo contrário, com uma fase mais avançada em virtude da diminuição da DLCO e da presença de descrições imagiológicas compatíveis com fibrose no GI. : It is still controversial the role of bronchoalveolar lavage (BAL) profiles in the diagnosis of Sarcoidosis. The recent Statement on Sarcoidosis supports Costabelâs finding that a BAL CD4/CD8 ratio greater than 3,5 has a high specificity even in the absence of conclusive transbronchial biopsy. The aim of this study was to evaluate if this cut off value of 3,5 would correlate to specific inflammatory patterns, imaging or functional features, or different staging of the disease. Through a retrospective analysis of 295 fiberoptic bronchoscopies performed in 268 patients with suspected Interstitial Lung Disease, between January 2000 and June 2002, of which 46 had biopsy-proven Sarcoidosis, we divided these patients into two groups based on that cut off value: Group I (GI) 3,5. Inflammatory markers, imaging data including radiological stage, lung function tests and systemic involvement were studied.Of the 46 patients involved, 20 were included in GI and 26 in GII, showing no significant differences concerning sex and age between the two groups. The radiological staging showed a predominance of stage 0 in GI and stage II in GII. 67Ga scan illustrated hilar and pulmonary hyperfixation in 85% of the patients in both groups. Lung function tests were essentially normal, with GI showing a higher percentage of decrease in DLCO. When CT scan was performed, the main alterations found regarded interstitial involvement of the lung (around 40% for both groups), with fibrotic changes only present in GI. Systemic disease was confirmed in 25,0% for GI and 30,8% for GII.There were no significant differences between the two groups. However, the authors may question wether a low CD4/CD8 ratio could either be associated with an initial satge of Sarcoidosis (predominance of Stage O) or, instead, with a worse prognosis as shown by the diminished DLCO and the presence of fibrotic changes found in GI. Palavras-chave: Sarcoidose, Lavagem broncoalveolar, relação CD4/CD8, Key-words: Sarcoidosis, bronchoalveolar lavage, relation CD4/ CD8

Abstract The use of biomass for energy production constitutes a promising strategy that warrants the search for new sources of biomass. Elephant grass has been gaining notoriety due to its high dry matter yield and rapid growth. The present study was carried out to quantify the genetic divergence of nine elephant grass half-sib families in order to identify genotypes with greater genetic divergence and productive potential for hybridization, using the hierarchical clustering methodology based on principal components. Half-sib families were generated using genotypes from the Active Germplasm Bank of Elephant Grass. The experiment was laid out in a randomized-block design with nine half-sib families, three replicates, and eight plants per plot. A total of 216 genotypes of elephant grass were evaluated. Principal component (PC), biplot, and hierarchical clustering analyses for diversity estimation were conducted using R software. The first two PCs of biplot analysis accounted for 64% of the cumulative variation. Dry matter yield was the most important trait for genotype discrimination (0.89), followed by plant height (0.67) and stem diameter (0.61) in PC1. In this analysis, the distances between accessions were considered and there were no family links, which indicates the existence of wide variability within the evaluated families, since genotypes belonging to the same family were not grouped together, but rather distributed into different groups. Crosses between genotypes of group three and genotypes of groups one and two are recommended for the development of high-yielding genotypes when aiming at energy production.

Background:Pogostemon heyneanus leaves infusions are relevant in ethnopharmacology for treating colds, coughs, headaches, and asthma.Purpose: The essential oil chemical composition of a Pogostemon heyneanus specimen was monthly monitored from October 2021 to July 2022 to evaluate the climatic influences on its yield and chemical composition and antinociceptive, andanti-inflammatory properties.Methods: The leaves, collected monthly over a 10-month period, were submitted to hydrodistillation. The oils obtained were analyzed by gas chromatography coupled to a mass spectrometer and gas chromatography coupled to flame ionization detector. The P. heyneanus essential oil (PhEO) was tested in vivo to evaluate its peripheral analgesic actions through the abdominal writhing test induced by acetic acid, and peripheral analgesia by tail immersion. Neurogenic and inflammatory pain were evaluated by formalin test, and acute oral toxicity of the oil was also verified.Results: PhEO presented 27 chemical constituents with the highest predominance of patchoulol (43.6%–76.9%), α-bulnesene (0.2%–12.7%), α-guaiene (0.4%–8.9%), seychellene (3.8%–5.1%) and pogostol (0.0%–8.2%). The climatic parameters insolation, humidity, rainfall, and temperature did not influence the essential oil yield or the main chemical constituents, except for pogostol, which presented a strong (r = 0.73) and statistically significant (p < 0.05) correlation with temperature. PhEO did not display toxicity at the maximum 300 mg/kg dosage. The oil showed low peripheral and central analgesic action at 100 mg/kg, while in the neurogenic and inflammatory pain inhibition tests, no actions related to PhEO were observed. In the carrageenan-induced peritonitis test, PhEO did not reduce the migration of leukocytes to the peritoneal cavity compared to the control group.Conclusion:Pogostemon heyneanus is a resistant plant to seasonal influences and a source of patchoulol. Despite ethnopharmacological indications, no in-vivo biological activities such as neurogenic or inflammatory pain were identified in the present work. So, the low influence of the climatic parameters on chemical composition can infer that the low pharmacological activity is also not subject to climatic variations, that is, it does not change due to the climate.

This paper shows an extensive study on the Typical Connections used in Double-Layer Space Truss. For this structural system, the ends of the bars are flattened to connect the bars. However, the flattening process results in a highly plastic stamping zone susceptible to warping with the appearance of two eccentricities, one of which causes rotation of the connection, with the presence of a bending moment with local rupture resulting in progressive collapse of the entire coverage system, as already evidenced in several countries. Therefore, eccentricity in this paper is studied and an analytical solution to the problem is presented through the use of a new device called a spacer. Furthermore, a preliminary study with complex numerical simulation was carried out with nonlinear analysis in ABAQUS were evaluated. For this study, nine space trusses were experimentally tested with reinforcement spacer in reduced trusses. After confirming the efficiency of the spacer proposal, another six space trusses were tested in the laboratory, this time, on a full-scale. In this study, two types of spacers were evaluated, one made of USI SAC 350 steel and another cheaper one made from recycled tires from heavy vehicles with multiple filaments of steel and nylon wires in the rubber layers. The two devices presented very close resistance capacity values, with a resistance gain of approximately 30% in relation to connections without reinforcement, with structural failure characterized by buckling of the bars. Finally, a numerical study of space trusses with spacers was developed. In practical design terms, from these FE simulations it was possible to determine the normal stresses for different spacers applied in the different modeled spans.