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Introduction: Distinguishing and categorizing the origin of garlic are highly significant, considering its widespread use as a flavoring agent. With billions of dollars annually in global trade, garlic is frequently susceptible to fraudulent practices. Methodology: Paper spray ionization mass spectrometry (PS‐MS) was employed to quickly analyze garlic samples from distinct geographic origins: China and Brazil. The so‐generated PS‐MS data were treated with metabolomic multivariate approaches, and the garlic samples from these different geographic regions were easily discriminated. Results: Brazilian garlic was characterized to contain higher levels of amino acids, such as arginine, proline, and valine, and organosulfur compounds, such as allicin, alliin, and l‐γ‐glutamil‐S‐allyl‐l‐cysteine, compared to Chinese garlic. The PS‐MS data were treated employing multivariate approaches, typically used in the metabolomics field, and this protocol was promptly able to discern among both types of samples. Conclusion: Hence, this combined strategy holds promise not only as an effective tool for the authentication of the geographical origin of garlic but also as a powerful means for biomarker discovery. [ABSTRACT FROM AUTHOR]

There is an urgent need for energy sources with lower environmental impacts to dispose of waste generated by human activities. In this context, a holistic analysis of energy use of waste from agricultural and forestry activities, animal excreta, urban solid waste and sewage, waste from the pulp and paper industry and charcoal in Brazil is presented. Based on a bibliographic review, the current Brazilian panorama is presented in figures giving, a vision of national potential for harnessing bioenergy from this theoretical and technical potential. The QGIS3.24.2 Tisler geoprocessing tool was used to generate potentiality maps from census data of microregions and municipalities available in the IBGE database (2022) and in the Geocentric Reference System for the Americas (SIRGAS 2000). The results of map analysis by micro‐regions of the primary energy from agricultural residues highlight sugar cane, corn and soybeans crops, followed by wastewater and animal excreta. They stood out amont the studied sources of biomass with technical potentials of 53.17, 15.23 and 6.81 GW, respectively. With these results, it is concluded that Brazil could enable around 75 GW installed power, reusing all biomass, potentially 12.5 PJ, without considering the 16 GW already installed from sugarcane and paper black liquor plants. [ABSTRACT FROM AUTHOR]

Classifying papers according to the fields of knowledge is critical to clearly understand the dynamics of scientific (sub)fields, their leading questions, and trends. Most studies rely on journal categories defined by popular databases such as WoS or Scopus, but some experts find that those categories may not correctly map the existing subfields nor identify the subfield of a specific article. This study addresses the classification problem using data from each paper (Abstract, Title, Keywords, and the KeyWords Plus) and the help of experts to identify the existing subfields and journals exclusive of each subfield. These "exclusive journals" are critical to obtain, through a pattern detection procedure that uses machine learning techniques (from software NVivo), a list of the frequent terms that are specific to each subfield. With that list of terms and with the help of optimization procedures, we can identify to which subfield each paper most likely belongs. This study can contribute to support scientific policy‐makers, funding, and research institutions—via more accurate academic performance evaluations—, to support editors in their tasks to redefine the scopes of journals, and to support popular databases in their processes of refining categories. [ABSTRACT FROM AUTHOR]

Hypericum perforatum L. (St. John's wort) is one of the world's most consumed medicinal plants for treating depression and psychiatric disorders. Counterfeiting can occur in the medicinal plant trade, either due to the lack of active ingredients or the addition of substances not mentioned on the labels, often without therapeutic value or even harmful to health. Hence, 43 samples of St. John's wort commercially acquired in different Brazilian regions and other countries were analyzed by paper spray ionization mass spectrometry (PS‐MS) and modeled by principal component analysis. Hence, samples (plants, capsules, and tablets) were extracted with ethanol in a solid–liquid extraction. For the first time, PS‐MS analysis allowed the detection of counterfeit H. perforatum samples containing active principles typical of other plants, such as Ageratum conyzoides and Senna spectabilis. About 52.3% of the samples were considered adulterated for having at least one of these two species in their composition. Furthermore, out of 35 samples produced in Brazil, only 13 were deemed authentic, having only H. perforatum. Therefore, there is a clear need to improve these drugs' quality control in Brazil. [ABSTRACT FROM AUTHOR]

This paper reports the use of paper spray mass spectrometry (PS‐MS) combined with chemometric models to analyze seized samples of anabolic steroids. Because many forensic laboratories typically demand high‐throughput analysis for this type of sample, we developed a quicker and simpler alternative analytical method for routine analysis with minimal sample preparation. Oily samples (n = 39) resulting from seizures carried out by Brazilian Federal and State Police units were selected for this study. These samples were analyzed by PS‐MS in the positive ion mode and full scan (50–1000 m/z), providing spectra containing patterns of the respective active ingredients present in each product. A principal component analysis (PCA) model was built, which discriminated samples mainly according to their active ingredients and allowed to detect and characterize some cases of product counterfeiting. The variable selection method ordered predictors selection was employed jointly with PCA to improve sample cluster separation and to provide model simplification. The final PCA model was built with three principal components and using only 28 spectral variables. This model accounted for 69.82% of the variance and discriminated samples according to their specific active ingredients. [ABSTRACT FROM AUTHOR]

Rationale: The effort to make fake documents look real leads to the use of crickets and beverages to produce artificially aged papers, as land titles, based on yellowing caused by the use of these methods. An old practice in Brazil, called "cricketing", has led to the misappropriation of Brazilian land using these documents. We propose a rapid, simple, instantaneous and non‐destructive method to identify artificially aged papers by easy ambient sonic‐spray ionization mass spectrometry (EASI‐MS) analysis. Methods: Three typical aging procedures were used to obtain artificially aged papers using coffee, cola drink, and crickets, with the papers being analyzed by EASI‐MS. Multivariate statistical analyses were performed on the data to find the sample groups and to study the most relevant ions of each ageing procedure. High‐resolution MS (HRMS) was used to obtain the exact masses and attribute formulae to relevant ions present in the samples. Results: The combination of EASI‐MS and multivariate statistical analyses allowed us to identify the most relevant ions to classify the adulteration of documents and HRMS identified most of these relevant ions. TMS fingerprinting in combination with multivariate analysis also demonstrated that this approach can qualitatively differentiate all the examined paper samples. Conclusions: We developed a cheap, fast and easy method that can help to elucidate counterfeit documents that have been artificially aged, helping to identify chemical additives and one that can be used in forensic laboratories. [ABSTRACT FROM AUTHOR]

The social paper wasp Agelaia pallipes is known to eat carrion and scavenge on vertebrates. There are few records of wasps predating vertebrates, including an attack on an adult hummingbird and the predation of bird nestlings. During a project monitoring reproductive behaviour of a neotropical songbird, the Lined Seedeater Sporophila lineola in south‐eastern Brazil, we recorded the predation of a four‐day‐old nestling by a social paper wasp. In the video, the adult female bird attempted to visit the nest prior to the predation. The male could be seen with its crest feathers erect after a wasp left the nest, when the nestling was presumably already dead. When we arrived at the nest to remove the camera, we found the nestling dead, and did not observe the parents in the vicinity. We also registered two other dead nestlings in a different nest with similar wounds. However, the conclusive cause of death of those nestlings is unknown. Nest predation is a major selective pressure in birds, and insects are rarely assumed to play a notable role in this process. Further research is needed to better understand the nature of the relationship between wasps and birds. [ABSTRACT FROM AUTHOR]

Transitioning from gasoline and petroleum‐based products to biofuels and green chemicals is a paradigm shift that will lead to the development of the bioeconomy. In this sense, the role of biorefineries in countries like Brazil is very important as the country generates a huge amount of second generation (2G) biomass every year and also has an attractive consumable market. However, technological innovations are still required to unleash the fullest potential of biomass conversion to biofuels and biochemicals, although successful examples are already a reality. For example, Amyris Inc. has developed renewable products for cosmetics (squalene), healthcare (artemisinin), and flavors / fragrances, and Suzano Papel e Celulose has developed sustainable technologies for the production of pulp and paper, and lignin‐derived adhesives (Ecolig). First‐generation ethanol in Brazil is an established source of transportation fuel but 2G ethanol production with low production costs is still a challenge at commercial scale, and companies like Raízen and GranBio continue making efforts to improve the economic feasibility of the adopted processes. In this context, the RenovaBio Policy launched by the Federal Brazilian Government in December 2017 aims to boost the production and utilization of biofuels and green chemicals in the country. Considering the matters mentioned above, this paper discusses the Brazilian biorefinery developments, technological advances, and current industrial scenario for the production of biofuels and chemicals. © 2021 Society of Industrial Chemistry and John Wiley & Sons Ltd. [ABSTRACT FROM AUTHOR]

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ABSTRACT The recent expansion of tree plantations is the most important agrarian change in many parts of Brazil. This article uses the results of extensive field research to analyse the different ways paper and pulp companies assure their land base for eucalyptus plantations. The mechanisms of land access have changed little over the decades, amounting to a process of primitive accumulation which seems to be controlled by the ways the pulp industry influences land markets and prices, the strength of any resistance, and particularly the government support enjoyed by industry. Many paper and steel companies, either directly or indirectly, are increasingly relying on eucalyptus plantations, with negative impacts in many places. The expansion of tree monocultures with rural exclusion is characteristic of the wider phenomenon of land grab which is driven by the dominating financial logic of current capitalism. [ABSTRACT FROM AUTHOR]

Significant research and development in the areas of microwave photonics in Brazil are presented in this paper. These include direct microwave modulation of semiconductor laser diodes, optical control of MESFETs and HEMTs as well as high speed fiber optic components. Future directions for research in this area are discussed. [ABSTRACT FROM AUTHOR]

Objectives: To identify the 10 most numerically prolific authors publishing in the field of orthodontics for each year over the last decade (2011‐2020), describe the characteristics of these outputs and identify trends in the types of study being published. Materials and Methods: A Scopus literature search was conducted to identify the 10 most numerically prolific publishing authors in orthodontics for each year during this decade. Number and characteristics of all publications for each author were analysed with descriptive and inferential statistics. Results: Forty‐nine different individual authors were identified who were collectively prolific for between 1‐8 years within the assessment decade. These authors published a total of 2025 papers, with a median annual output of 18 papers per year; however, half of these authors published between 15‐24 papers per year (range 5‐200). Amongst authors, 2 or more collaborated on only 7% of the identified papers. The median number of authors per paper was 5 (range 1‐27) with significant variation according to study design (P <.001). The majority of authors originated from Brazil (19.3%), Italy (14.1%) and India (12.7%). Most papers described non‐prospective clinical studies (38.1%), case reports or case series (11.1%) and narrative reviews (10.8%). Finally, prolific authors had a smaller annual output when publishing in orthodontic journals (P <.001) and when publishing experimental primary research (P =.04). Conclusions: A cohort of prolific authors in orthodontics between 2011‐2020 was identified. Extreme variation was found in annual output between these authors but case reports, non‐prospective clinical studies and narrative reviews predominated. [ABSTRACT FROM AUTHOR]

The bibliometric analysis of the Brazilian periodical Journal of Biochemistry Education (JBE) covered the 117 articles published in 15 volumes in the period 2001–2017. Our results showed a positive trend in JBE publications with a significant increase in the number of articles since 2014, which can be related to the increase in research groups working in this area. The Southeast region of Brazil was the most productive one mainly due to the contribution of papers from institutions located in the State of São Paulo. Only four articles aimed the undergraduate courses (87.0%) showing methodological approaches to teach biochemistry (51.3%) and laboratory exercises (18.8%) among others. Most of the 332 authors contributed to a single article (87.7%) and just 3% of them published more than twice in JBE. The majority of the JBE articles had at least one citation in Google Scholar. There is also a great variety in the references used by the authors. Our analysis showed that JBE is an important peer reviewed publication aimed to improve teaching and learning of Biochemistry in Brazil. © 2019 International Union of Biochemistry and Molecular Biology, 47(3):249–256, 2019. [ABSTRACT FROM AUTHOR]

Introduction: Despite a recent drive to increase diversity, the global academic workforce is skewed in favor of authors from high‐income countries, and women are under‐represented in the published medical literature. Objectives: To explore the trends in authorship of three high‐impact otolaryngology journals over a ten‐year period (2011–2020). Methods: Journals selected: JAMA Otolaryngology–Head and Neck Surgery, The Laryngoscope and Rhinology. Articles were reviewed from four issues per journal per year, and data was collected on: time of publication; subspeciality; number of authors; sex of first and last authors; country of practice of first author and country where each study was conducted. Trends were examined though univariate and multivariate logistic regression models. Results: 2998 articles were included. 93.9% of first authors and 94.2% of studies were from high‐income countries. Women were first authors in 31.5% (n = 912) and senior authors in 18.4% (n = 524) of articles. Female first authorship significantly increased between 2011 and 2020 however female senior authorship remained the same. There have been no significant changes in the proportion of published articles from low‐and middle‐income countries (LMIC) over time (p =.65). Amongst the LMIC articles, 72% came from Brazil, Turkey or China and there were no published papers from countries with a low‐income economy (gross national income per capita of $1085 or less). Conclusions: Although female first authorship has increased in the last decade, there has been minimal other demographic change in authorship over this time. High‐impact otolaryngology journals poorly represent academia in low‐and‐middle income countries. There is a need for increased advocacy promoting gender and geographical research equity in academic medicine. Level of Evidence: III. [ABSTRACT FROM AUTHOR]

The article presents information on selected papers from the 18th Brazilian Symposium on Computer Graphics and Image Processing Rio Grande do Norte, Brazil. The paper "A Randomized Approach for Patch-based Texture Synthesis Using Wavelets" by Leandro Tonietto, Marcelo Walter and Claudio R. Jung, discusses a wavelet-based approach for selecting blocks in patch-based texture synthesis. The second paper was "GEncode: Geometry-driven Compression for General Meshes" by Thomas Lewiner and colleagues.

Academic discourse on food justice and sustainable food consumption needs to be informed by empirical contributions and heterogenous conceptualisations from diverse parts of the world. This paper broadens the dialogue with a variety of voices and knowledges, rooting itself not only in the specific political and social context, but also the discursive and epistemic traditions of Brazil, which stand in dialogue with international discourses. Firstly, an analysis is offered of the multi‐stakeholder process that since the mid‐1990s shaped the discourse, theorisation and policy making on food justice and sustainable food consumption in Brazil. Emerging from this process were globally leading Brazilian policy initiatives such as Zero Hunger, the School Feeding Program, the progressive Food Guide, and co‐crafted concepts such as comida de verdade. The institutional architecture for this discourse, the National Food Council and regular conferences, were dismantled in 2019 after a change in government. Secondly, the paper presents data from 30 interviews with key stakeholders from civil society, policy, business, media and celebrity influencers, conducted at the time of the dissolution. Three key subdiscourses on sustainable food consumption emerge: access, with an emphasis on right to food; health; and re‐conhecimento, a term we use to articulate the confluence of multiple knowledges and consciousnesses, including an insistence on the cultural role of food. Throughout the interviews, co‐crafted concepts and phrases emerging from the multistakeholder process reverberated. The paper argues that the multi‐stakeholder process resulted not just in a coherent shared discourse, concepts and policy during a period of conducive policy environment, but also in collective resilience. The invisible edifice of shared ideas and commitments around this public issue is still intact and may be reactivated in future. In times of increased political polarisation, not just in Brazil, this is an important argument for investing in such long‐term multi‐stakeholder dialogue processes. This paper analyses the distinct multi‐stakeholder process which shaped the discourse, theorisation and policy making on food justice and sustainable food consumption in Brazil. It presents data from 30 interviews with key stakeholders, from which three sub‐discourses emerge: access; health; and re‐conhecimento. The paper argues that although the multi‐stakeholder forums crafting this discourse were dismantled in 2019 after a change in government, the process of co‐crafting has resulted in key concepts and a shared vision which demonstrate collective epistemic resilience. [ABSTRACT FROM AUTHOR]

The article reflects on the issue on plant science in Korea. It reveals that the theory on country's scientific focus was not transparent to the people involved in the research. It presents an analysis with the participation of top ten countries including Northern America, Europe, Japan, and Australia. It succumbs that the countries in Asia are smaller than those mentioned above with respect to research publication other than Japan. It explains that Korea and China have increased the number of papers being published annually which out put is equaled with Brazil.

Background Aim Methods & Procedures Outcomes & Results Conclusions & Implications WHAT THIS PAPER ADDS What is already known on the subject What this paper adds to existing knowledge What are the potential or actual clinical implications of this work? Speech and language therapists (SLTs) play an important role in assessing and rehabilitating communication disorders in people with dementia, but there is evidence to suggest that they do not receive appropriate training to provide management and support during their training.To investigate the level of awareness and knowledge that practising SLTs from Brazil have about dementia and their role in the care of dementia through an online survey.An online survey tool was developed to collect information from practising Brazilian SLTs regarding their knowledge about dementia, awareness about their role in the care of people with dementia, and opinions on how SLTs may be better prepared to work in the dementia field. The survey was disseminated via social media, websites, and e‐mail lists of researchers and stakeholders.A total of 227 SLTs completed the survey. Participants showed good knowledge of dementia in general, while their answers were less accurate on primary progressive aphasia. Regarding the awareness by SLTs of their role in the care of people with dementia, most agreed or strongly agreed that SLTs could help people in the diagnosis, treatment and prevention of dementia (> 80%). However, fewer participants agreed or strongly agreed that they felt confident in contributing to the treatment and diagnosis process of dementia (about 50%). To improve the training of SLTs in Brazil, most participants believed that it would be necessary to improve the teaching of dementia at the undergraduate speech and language therapy curriculum level and to develop recommendations or guidelines about speech and language therapy practice in dementia.The results of this survey point to a need for improvement in the knowledge and confidence of Brazilian SLTs about dementia. To reach this goal, targeted training courses and applied practice opportunities should be embedded within university curricula and training programmes. Many studies confirm the importance of speech and language therapy in the non‐pharmacological treatment of people with dementia. However, other evidence suggests to a possible lack of training for Brazilian SLTs, especially in the curriculum of undergraduate courses. This study reveals that Brazilian SLTs have substantial knowledge of dementia and recognize the significance of their role in treating people with dementia. However, a minority expressed confidence in their ability to assess and treat people with dementia. The findings of this research demonstrate that Brazilian SLTs have good knowledge of dementia and endorse their professional role in dementia care; however, they lack confidence in their own skills and expertise in diagnostic assessment and treatment of dementia. Interventions aimed at boosting the SLT's confidence level could lead to improved patients outcomes and overall quality of care within clinical settings. [ABSTRACT FROM AUTHOR]

This paper explores how research advisory groups can be a vehicle for youth activism. It draws on our experiences with young activists, aged 15–26 years, in India and Brazil, who were advisors on a research project focused on youth livelihoods in cities. These young people played a vital role in supporting youth researchers, identifying research themes and developing engagement and advocacy strategies. Through this paper, we explore how the Youth Expert Group advisory model evolved differently in each location and examine how these were shaped by the context, the 'adult' research team and the youth activists themselves. A critically reflexive response in intergenerational partnership is essential to support youth activists in research activities. [ABSTRACT FROM AUTHOR]

This paper studies the history of contractual choice in coffee plantations of São Paulo, Brazil. It focuses on the consolidation of non‐captive labour markets in the early phases of the transition from slavery in the country, particularly in the 1840s–50s. Vis‐à‐vis the alternatives of fixed rents and fixed payments per time worked or piece rates, the paper examines the rationale for the adoption of sharecropping arrangements with European bonded labourers. New archival evidence suggests that sharecropping had no obvious productivity advantage over alternative labour–rental arrangements in this period, and that the adoption of sharecropping arrangements resulted from the positional advantage of its first proposers, who influenced later choices of contractual design. A credit‐labour tie‐up long outlived the original sharecropping arrangements, in turn allowing for the immigration of poor and credit‐constrained Europeans, paving the way to insert Brazil into the circuits of mass migration without promoting institutional reforms to attract non‐bonded immigrants. [ABSTRACT FROM AUTHOR]

Tropical studies traditionally describe insect diversity variation throughout the year. The temporally structured responses of insect assemblages to climate seasonality vary across ecosystems due to gradients of resource availability and limiting ecological factors. These idiosyncratic responses might be particularly true across the vast geographical range of the Brazilian territory, including various environments that harbor one of the most diverse ant faunas worldwide. This study addressed the relationship between ant diversity and climatic seasonality, performing a quantitative review of the published data on ant diversity collected in Brazil. We investigated the seasonality effect on ant abundance and richness described in the literature in 47 papers published between 2000 and 2018. These studies were developed mainly in the Atlantic Forest biome and collected ants with pitfall traps on the soil/litter stratum. We initially carried out a vote-counting procedure by comparing the number of significant results describing seasonal differences in the ant assemblage. We found that most papers described a similar pattern of ant abundance, richness, and species composition between seasons. However, when we performed a meta-analysis, we observed a clear pattern of higher ant abundance and richness in the wet/summer season compared with the dry/winter season. Our meta-analysis reveals that the ant diversity decreases in the dry season, strongly in the Cerrado biome. Additionally, we point out differences in the sampling effort across biomes, indicating the need for further investments in studies focused on temporal diversity patterns, including seasonal effects, on the insect assemblage in biomes less investigated so far. Abstract in Portuguese is available with online material. [ABSTRACT FROM AUTHOR]

Knowledge management structures (KMs) can be defined as structures whose purpose is to encourage people to build relationships, networks and trust. Global companies like Apple, Inc. have promoted these structures to transform its organisation into a knowledge‐based organisation. This paper identifies the role of national culture on four KMs namely open‐mindedness (OM), counter‐knowledge (CK), environmental innovation (EF) and customer capital (CC). In doing so, this study uses data collected from 354 end users of Apple (161 from Italy and 193 from Brazil). This paper provides evidence that while Apple end users from Brazil are more positively associated with higher levels of OM and CC, Italy users are more positively associated with higher levels of CK and EF. This paper discusses the role of the six dimensions of national culture–power distance, individualism, masculinity, uncertainty avoidance, long‐term orientation and indulgence of a nation that plays a significant role in how they impact the KMs. Hence, this study serves as an important contribution to global companies that are trying to develop their KMs to sustain competitive advantages. [ABSTRACT FROM AUTHOR]

This paper investigates the effects of a minor G1 Co‐rotating Interaction Region (CIR)/High‐Speed Stream (HSS)‐driven geomagnetic storm that occurred on (13–14 October 2018), during deep solar minimum. We used simultaneous observations from multiple instruments, namely; ground‐based Global Navigation Satellite Systems (GNSS) receivers, a Digisonde, ground magnetometers, and space‐based observations from the National Aeronautics and Space Administration Global‐scale Observations of Limb and Disk (GOLD) and SWARM missions. This study presents a detailed picture of the low‐latitude ionosphere response over the Brazilian sector during a minor storm. Our results showed that the minor CIR/HSS‐driven storm caused a positive ionospheric storm of over ∼20 TECU in magnitude. For the first time, periodic post‐sunset irregularities and Equatorial Plasma Bubbles, equatorial plasma bubbles, were analyzed using GOLD FUV OI 135.6 nm emission, Total Electron Content (TEC) maps, Rate of TEC index, ROTI, and TEC gradients. Fluctuations in the interplanetary magnetic field Bz and changes in the thermospheric column density ratio (∑O/N2) are discussed as the main sources of ionospheric changes during the storm. This paper highlights the importance of monitoring and understanding the impact of Sun‐Earth interactions and provides insight into the behavior of the low‐latitude ionosphere during minor geomagnetic storms. Plain Language Summary: Solar activity has been steadily declining over the past 4 solar cycles, in particular, the solar minima of Cycles 23 and 24 (2008–2009 and 2018–2019), were unusually weak in terms of solar activity. This period of low solar activity called deep Solar Minimum, provides a unique opportunity to study the behavior of the Earth's atmosphere and its interactions with the sun. Although the solar minimum of SC24 had much fewer sunspots than usual, which are the source of intense geomagnetic storms, fast solar wind streams or High‐Speed Streams (HSSs) were still present. HSSs interact with the slower‐moving wind, causing weak‐to‐moderate geomagnetic storms which have significant impact on the Geospace. These storms affect the Total Electron Content and plasma gradients in the ionosphere, which are important sources of errors and failures in positioning and navigation such as Global Navigation Satellite Systems and GBAS systems. This article discusses the effects of a minor geomagnetic storm during a deep solar minimum in 2018 on the Brazilian low‐latitude ionosphere. Key Points: A minor Co‐rotating Interaction Region/High‐Speed Stream storm triggered a large positive ionospheric storm during deep solar minimumMulti‐scale, periodic plasma irregularities were detectedFirst characterization of equatorial plasma bubbles (EPBs) over Brazil using space‐borne Global‐scale Observations of Limb and Disk (GOLD) FUV 135.6 nm images and ground‐based instruments [ABSTRACT FROM AUTHOR]

This paper presents a successful application of the mise‐à‐la‐masse (MALM) or applied potential method in association with induced polarization (IP). MALM is known, since 1920, to be able to delimit electrically conductive massive mineralization. The method is used at the point where a drill hole intercepts a massive, mineralized body, to estimate its extent and shape. It is thus used as a complementary mineral exploration tool. IP is normally used in conjunction with resistivity. However, the acquisition of IP data together with the MALM method is rarely found in the literature. This survey shows that it is possible to successfully detect and delimit areas of disseminated sulphides using MALM with IP. In this paper, the MALM method is presented and discussed in detail. A short description of the IP method is also provided. Data are from the Camaquã Project (Caçapava do Sul, RS, Brazil) and the Santa Maria (lead, zinc and associated silver) deposit, 5 km south of Caçapava do Sul. In a well that intercepted a massive mineralization (borehole 8011) with electrical continuity, ∆V measurements delineated the extent, shape and orientation (NS) of a conductive sulphide body. Mineralization intercepted by other two wells (8011 and 8103) did not present enough electrical continuity to exhibit potential contours that could be associated to massive sulphides; it was, however, successfully detected by IP. [ABSTRACT FROM AUTHOR]

Authors of 4 papers that were recently published from under‐represented regions of the world offer their advice on how to get started in an effort to facilitate similar success for others. [ABSTRACT FROM AUTHOR]

A key scientific publication demonstrates that the bio‐physical composition of the broiler chicken (Gallus gallus domesticus) represents a signal of the Anthropocene. This finding contributes to a wider body of evidence that locates the beginning of the Anthropocene in the mid‐20th century, and is part of a broader intellectual project that seeks to establish and demarcate the Anthropocene as a new geological era. This paper takes a different tack. Treating Gallus gallus as an objective corollary for the Anthropocene, it positions the broiler chicken and the Anthropocene as an ontologically emergent nexus comprised of social–spatial relations, materialities, and practices. The paper then adopts critical nexus thinking to trace out the key relations and materialities, and their points of convergence, and underpinning extractivist ontologies that assemble into the chicken's body. Relations of particular concern include the processes that embody surplus value into the corporality of the chicken; the rationalisation and transformation of territories and landscapes into productive units of space, and the tightly coupled, interconnected flows of relations, materials, and coordinating technologies that comprise the 'supply chain'. It argues that by using critical nexus thinking to identify and articulate these relations that assemble into Gallus gallus, it renders the Anthropocene legible. Such legibility in turn fosters geographical awareness and responsibility that might lead to the changes necessary to address the large‐scale spatial inequalities from which the era stems and redress the consequences that the era might otherwise engender. Paper positions Gallus Gallus Domesticus ('The Broiler Chicken') as an objective corollary for the Anthropocene. It then employs critical nexus thinking to trace out its constituent relations and to fashion a geography of the Anthropocene. [ABSTRACT FROM AUTHOR]

This paper uses qualitative data conducted in São Paulo, Brazil with those who possessed the capability to emigrate yet had chosen to remain in place. It explores the strategies these 'stayers' employed to create and reproduce a sense of belonging to place in the midst of political disruption and alienation. This is in the context of Brazil's lava jato (car wash) political corruption scandal which culminated in the election of President Bolsonaro and affected many Brazilian citizens' sense of belonging. Particular attention is paid to the way articulations of subnational and supranational scales of belonging relate to the national. Belonging at the national scale remains salient but through a process of interpolation with affective, local, urban and cosmopolitan forms of belonging. Immobility thus becomes an active practice through the (re)imagining and re‐scaling of a sense of belonging. Developing this concept of 'active' immobility recognises immobility as a phenomenon that is driven by individual and structural elements that are as diverse and dynamic as those that affect mobility. The paper contributes to debates about the relationship between forms of local national and cosmopolitan belonging. [ABSTRACT FROM AUTHOR]

This paper examines whether and how the imperatives of measuring Official Development Assistance (ODA; or development aid) are being translated to the policy world of South–South cooperation (SSC). Through a historical and political ethnographic account of a decade of global policy debates on Southern‐led development cooperation between 2009 and 2019, the paper argues that growing conversations on 'SSC effectiveness', and how to measure it, reflect both prevalent 'measurementalities' in the field as well as 'traditional/Northern donor countries' continuous will to socialise and integrate '(re)‐emerging Southern providers' into existing aid norms and practices. The paper also demonstrates Southern powerhouses'—such as Brazil, China, and India—agency in these accountability‐related debates and their will to integrate differently into the 'aid system' by proposing alternative tools to measure SSC flows and initiatives in their own terms. Finally, the paper argues that unfolding negotiations over quantifying, reporting, and evaluating Southern‐led development cooperation reflect the politicised consolidation of SSC in the second decade of the 21st century. Current impasses at the multilateral level, moreover, reveal unsolved North–South disputes over power, status, and responsibility in international development and international affairs, more broadly. [ABSTRACT FROM AUTHOR]

Right‐wing variants of populism are on the rise across the globe, creating new patterns of interaction between society and the environment. These new socio‐ecological relationships – dubbed "populist ecologies" – are not homogenous and, instead, can vary from country to country and populist to populist. In this paper, we adopt two illustrative case studies to outline two particular right‐wing populist ecologies. First, we turn to the government of Jair Bolsonaro in Brazil (2019 onwards) and detail the ways in which Bolsonaro's anti‐science agenda is evident in his response to patterns of deforestation and the "burning of the Amazon" in 2019. Second, we explore the politics of Matteo Salvini in Italy, highlighting how, in this form of right‐wing populism, the environment has become a container for wider political ambitions. In doing so, this work highlights the complexity of the relationship between contemporary right‐wing populism and the environment – and the ways in which populist ecologies may act to conceal the more‐nefarious elements of the populist moment. This paper details how right‐wing variants of populism create new socio‐ecological patterns of interaction. Drawing on case studies of Jair Bolsonaro in Brazil and Matteo Salvini in Italy, we advance a conceptualisation of "populist ecologies" to explore and make sense of how ecology is represented within far‐right populist projects. In doing so, we highlight an important complexity in which populist ecologies may function to conceal broader, more nefarious elements of far‐right populist projects. [ABSTRACT FROM AUTHOR]

This paper investigates associations between migration and inter‐municipal commuting to work in the Metropolitan Region of São Paulo with two main objectives: to determine whether a connection exists between long‐term relocation and daily travel and to determine whether this relationship is dependent on the distance of the migratory process. The empirical strategy is based on the estimation of univariate and bivariate probit models applied to microdata of the Brazilian Demographic Census of 2010. Different socio‐economic and demographic characteristics, such as sex, age, civil status, household arrangements and labour market features, were associated with both inter‐municipal commuting and migration. Moreover, associations between inter‐municipal commuting and migration depended on the distance of migration. It was observed that inter‐municipal commuting and intrametropolitan migration are complementary, whereas commuting and longer distance migration are substitutes. [ABSTRACT FROM AUTHOR]

This paper seeks to validate the hypothesis that in Brazil, between 1941 and 1948, when the first geographical expeditions to the sertão (backcountry) of Brazil took place, there was a transition in the epistemological style practiced by geographers between the historicist and ecological approach and a positivistic planning approach. Added to both is the need to restructure the colonial legacy of the country's territory, a perspective marked by social geography with a Marxist bias. This transition process is, simultaneously, the construction of another hybrid geographical style and an epistemological point of view of its own. This form of epistemology reflects the configuration of space, i.e., the continuity of the economic and political life of the coast without major modifications. However, the projected planning perspectives for the future occupation of the sertão, seen by the actors of the time as an empty territory, with resources and in which its occupation could gradually reverse Brazil's colonial legacy. Brazilian scientific space is observed as a circulation of knowledge, which is subject to tensions. Conceptual developments occurred in discussions in National Council of Geography (CNG) and Brazilian Institute of Geography and Statistics (IBGE) institutional settings and were called 'geographical talks/gatherings', which were published in the Boletim Geográfico and the Revista Brasileira de Geografia. Based on these discussions and controversies, it was possible to differentiate the styles of geography mobilised by actors, as well as to create a general interpretation based on the material analysed. Development geography and a geographical reason are understood as the result of this construction, based on two main factors: the influences of foreign geographies and the nature of the country. The methodology adopted was a geo‐history of knowledge, associated with aspects of Bruno Latour's actor‐network theory. Finally, the paper seeks to contribute to the validation of the epistemological and heuristic virtues typical of the southern hemisphere. [ABSTRACT FROM AUTHOR]

This paper focuses on data science in digital cultural heritage in Brazil, where there is a lack of systematized information and curated databases for the integrated organization of documentary knowledge. Thus, the aim was to systematically map the different forms of information organization and representation applied to objects from collections belonging to institutions affiliated with the federal government's Special Department of Culture. This diagnosis is then used to discuss the requirements of devising strategies that favor a better data science information infrastructure to reuse information on Brazil's cultural heritage. Content analysis was used to identify analytical categories and obtain a broader understanding of the documentary sources of these institutions in order to extract, analyze, and interpret the data involved. A total of 215 hyperlinks that can be considered cultural collections of the institutions studied were identified, representing 2,537,921 cultural heritage items. The results show that the online publication of Brazil's digital cultural heritage is limited in terms of technology, copyright licensing, and established information organization practices. This paper provides a conceptual and analytical view to discuss the requirements for formulating strategies aimed at building a data science information infrastructure of Brazilian digital cultural collections that serves as future projects. [ABSTRACT FROM AUTHOR]

Aim: This study evaluated medication poisoning in paediatric patients through a systematic review and a retrospective documentary analysis in a Brazilian toxicological centre. Methods: The data were systematically collected on PubMed, Scopus and SciELO databases following the Preferred Reporting Items for Systematic Reviews and Meta‐Analysis guidelines. We included epidemiologic and prevalence studies that were published in English or Portuguese from 2013 to 2017 and covered paediatric patients. The retrospective incidence study was carried out in a Brazilian toxicological centre and was a documentary analysis of paediatric medication poisoning cases from 2005 to 2015. Results: The systematic review comprised 13 papers covering 895 206 poisoning cases from six different countries. The main agents of intoxication were analgesics and antihistamines. The eight papers that explored the reasons for the poisonings showed that 93% of those 762 863 cases were accidental. The Brazilian toxicological centre recorded 443 paediatric patients poisoned by medication such as benzodiazepines, analgesics and antibiotics and found that 63.2% were accidental. However, it agreed with the global findings in many other aspects. Conclusion: The systematic review showed a sustained number of paediatric medication toxicity cases worldwide and the key findings were broadly reflected by the retrospective study carried out in the Brazilian toxicological centre. [ABSTRACT FROM AUTHOR]

Copyright of Conservation Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents high‐resolution field measurements of the wind and saltation fields using miniphones and anemometers located 20–40 mm apart (bed‐parallel) and 10–40 mm above the bed. The average wind speeds at the Shoalhaven Heads, Australia and the Jericoacoara, Brazil field sites are both 4.4 m s−1, and the average saltation rates are 5.0 and 22.2 counts/mm2 s−1, respectively. Normalized cross‐covariance analysis between the wind and saltation time series indicates a dominant saltation response time of 0 s. Cross‐wavelet analysis focusing on short‐duration events characterizes statistically significant wind–sand events and intervals. In the high aeolian saltation rate environment (Brazil), the events and intervals averaged 1.9 and 12.2 s. The low transport environment (Australia) resulted in 2.1 s events and 10.8 s intervals. This study demonstrates that wind–sand events occur about 15% of the time but account for about 23% of the sand transport. These results were possible because of the presentation of a wavelet‐derived event time series. The criticality of tightly controlled field experiments to measure coincident wind and saltation fluctuations with co‐located sensors was demonstrated. This paper emphasizes the importance of the contribution of saltation events to time‐averaged transport rates, which influences sediment flux modelling. [ABSTRACT FROM AUTHOR]

Copyright of Antipode is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

One dominant narrative of the recent Brazilian crisis elaborated by scholars explains it as the result of a (lost) battle of secularist and progressive forces against religious and conservative ones. This paper challenges such a Manichaean viewpoint, by approaching grassroots politics in the context of critical events from Dilma Rousseff's impeachment to Jair Bolsonaro's victory in the 2018 presidential elections, from an ethnographic perspective. Drawing on fieldwork among Pentecostal families involved in the Landless Workers Movement, this paper argues that looking at moral reciprocity as well as power relations may help us to move beyond dichotomous stereotypes and analytical frameworks such as 'patronage' or 'populism'. [ABSTRACT FROM AUTHOR]

Coeval Neoproterozoic mafic dykes with a well‐constrained isotopic age of 925 Ma are distributed in the North China Craton (NCC) of China and São Francisco Craton (SFC) of Brazil. Several recent studies favor the hypothesis that these two cratons were connected during 925 Ma and constituted building cratons for the supercontinent Rodinia. However, the paleo‐positions of the two cratons in Rodinia have not yet been paleomagnetically resolved. This paper presents the paleomagnetic results of these dykes in both NCC and SFC. Detailed thermal and alternating‐field demagnetization revealed that these dykes record stable components of magnetization with unblocking temperatures below the Curie temperature of magnetite. Rock magnetic results and scanning electron microscope analysis further confirm that the major magnetic minerals in dyke samples are pseudo‐single domain titanomagnetites. The mean directions of the characteristic remanent magnetization (ChRM) of the dykes are distinct from those of rocks of different ages in the sampling localities, and are supported by positive baked contact tests, indicating primary remanent magnetization. The ChRM of the SFC dykes also exhibits dual polarity. Our results suggest that the NCC and SFC were in the moderate to high paleolatitudes of the Southern Hemisphere during approximately 925 Ma, suggesting a possible paleogeographic connection between the two cratons. A new paleogeographic reconstruction of both cratons during 925 Ma is proposed, which is supported by other geological evidence. Plain Language Summary: The formation and breakup of the supercontinent Rodinia have played crucial roles in the global tectonic evolution and paleoclimate changes during the Neoproterozoic which lasted from 1.0 billion to 541 million years ago. The exact configuration of the Rodinia remains debatable, including whether the North China Craton (NCC) and São Francisco Craton (SFC) were integral components of the Rodinia. In this paper, we present new results of an integrated investigation, including paleomagnetic and rock magnetic studies and scanning electron microscope analysis, on the well dated coeval 925 Ma mafic dykes in both NCC and SFC. The results of scanning electron microscope and magnetic measurements confirm the major magnetic minerals and the stability of characteristic remanence directions. The results imply that both NCC and SFC were located at moderate to high paleolatitudes of the Southern Hemisphere during approximately 925 Ma, suggesting the possibility of a paleogeographic connection between the two cratons in the Rodinia. The findings of this study help gain improved understanding of paleogeography of the early Earth. Key Points: Characteristic remanence for the 925 Ma dykes in North China Craton and São Francisco Craton is interpreted as primaryBoth cratons were located at moderate–high paleolatitudes, southwest of Rodinia's core at 925 Ma, suggesting a paleogeographic connectionThe possible paleogeographic connection between the two cratons is supported by new paleomagnetic and geological evidence [ABSTRACT FROM AUTHOR]

This paper explores the variation in intergenerational educational mobility across the Brazilian states based on univariate econometric techniques. The analysis of the national household survey (PNAD‐2014) confirms a strong variation in mobility among the 27 federative units in Brazil and demonstrates a significant correlation between mobility and income inequality. In this sense, this work presents empirical evidence for the existence of the "Great Gatsby curve" within a single country: states with greater income disparities present higher levels of persistence in educational levels across generations. Finally, the paper investigates one specific mechanism behind this correlation: whether higher income inequality might lead to lower investment in human capital among children from socially vulnerable households. The paper delivers robust and compelling results showing that children born into families where the parents have not completed primary education have a statistically significant reduction in their chance of completing the educational system if they live in states with a higher level of income inequality. [ABSTRACT FROM AUTHOR]

This article applies a transformation into probabilities of preference, to rank papers submitted to the XLI Brazilian Symposium of Operational Research. Some 42 papers were divided into sets according to their main topics of interest and measures for 12 attributes were considered, for each paper separately, and also for sets of papers on the same topic, based on the referees' evaluations. Four alternative forms of composition of the probabilistic preferences are illustrated. [ABSTRACT FROM AUTHOR]

Within emerging fields of research focusing on neuro‐urbanism, neuro‐geographies, and biosociality, which experiment with using emerging mobile biosensor methods, few if any have used them to research socio‐spatial life in communities that suffer high levels of violence and other socio‐spatial injustices. Extending non‐representational accounts of the body, emotions, and affect, this paper discusses an experimental geography–neuroscience collaboration, working in a favela of Rio de Janeiro to explore the embodied urban emotions and affects of violently bordered urban communities. Emphasising non‐representational, corporeal spatial practices in a study of women living in Brazil's favelas, we use electrodermal activity biosensors to propose a novel methodological and analytical approach that focuses on forms of affective debilitation and resilience. Theoretically, we draw on biopolitical theory and border theory to propose a method that avoids oppositions between biopolitical and necropolitical accounts of borders. The aim of the research, conducted in June 2016, is to understand levels of affective debilitation or resilience among women living in the Maré Complex of favelas in Rio de Janeiro. Using a wearable biosensor, we took measures of electrodermal activity of eight women as they undertook one of their routine, everyday journeys within the favela. We also conducted an hour‐long qualitative interview with each participant. We find that for all our participants, navigating the favela's violent border spaces subjects their bodies to very high levels of affective and cognitive demand. While some women responded to this with stress reactions that created acute levels of affective debilitation, others responded very strongly, showing exceptionally high levels of affective resilience. Our research highlights the affective labour required of women to co‐construct urban borders, and emphasizes their agency and forms of everyday resistance in shaping the favela's affective atmospheres. Combined biosensing (electrodermal activity/galvanic skin response) data and interview data reveal that women living in the favela experience high levels of stress and fear. For one resident this results in affective debilitation (a wounding of the capacity to affect and to be affected). However, other women showed exceptionally high levels of affective resilience and resistance. The research points to the important role of women in co‐constructing the embodied borders of the favela. [ABSTRACT FROM AUTHOR]

This paper estimates the impact of Brazilian soybean area expansion on US and Brazilian soybean exports to China by projecting these countries' exports for various Brazilian soybean area growth scenarios. The results indicate that the Brazilian area expansion does not significantly affect US soybean exports to China but positively impacts Brazil's soybean exports to China. Ex‐post analysis of the impacts of Chinese tariff during the US–China trade war indicates that China significantly diverted its imports from the United States to Brazil. We conclude that the US soybean trade policy should focus on mitigating the adverse effects of import demand changes. [ABSTRACT FROM AUTHOR]

Corporate environmental sustainability requires two complementary types of green practices—environmental protection hardware (EPH) and environmental protection software (EPS). Stakeholder greening pressures drive implementation; however, corporate responses vary, often lacking the balance and intensity of EPS and EPH needed. This paper explores the role of green human resource management (GHRM) in explaining variations in the implementation of EPH and EPS in response to stakeholders' pro‐environmental pressures. Drawing on stakeholder theory and the ability, motivation, and opportunity (AMO) framework, a mediating role is hypothesized. Empirical findings from Brazil using structural equation modeling reveal that increased green pressure from stakeholders drives the adoption of both types of green practices through a partial mediating role of GHRM that is stronger for EPH than for EPS. The value of this study lies in the consideration of EPH and EPS practices in the same model and expanding stakeholder theory on how stakeholders can improve environmental protection through GHRM. Implications are that organizations can level the field for the balanced application of EPS and EPH with a system of green human resource management practices—training, assessment, rewards, and teamwork—to channel the translation of stakeholder pressures into workplace green outcomes. Limitations, future research ideas, and policy and practice implications are detailed. [ABSTRACT FROM AUTHOR]

The relationship between the productivity of crops of agricultural interest and their interactions with physicochemical soil properties is widely explored. However, there is still a gap concerning the contribution of biological soil attributes and especially the relationship between crop productivity and the structures of organism communities within the soil, such as the enchytraeids. This paper aimed to evaluate the diversity and structures of enchytraeids communities in subtropical soils and their relationship with soybean productivity and soil properties within a no‐tillage system. This study was conducted in soybean growing grounds working under no‐till farming systems in southern Brazil. Samples were collected according to ISO 23611‐3 and extracted with the hot–wet methodology. The organisms were identified up to their genus level. Enchytraeids density increased with the increase of soybean productivity for both evaluated crops. Enchytraeus, Fridericia, and Hemienchytraeus were more abundant in high productivity and genus Achaeta was only found in the second crop and was not a sensitive indicator toward changes in soybean productivity. Regarding the relationship between the enchytraeid community and soil attributes, the variables clay, phosphorus, moisture contents, pH, Ca/Mg as well as carbon and nitrogen from soil and litter, affected Enchytraeidae distribution. Enchytreids showed significant correlations with soybean productivity in the no‐tillage system for subtropical soils in Brazil, demonstrating potential bioindicators of soil quality and consequently of soybean productivity. [ABSTRACT FROM AUTHOR]

This paper provides evidence about location and colocation patterns of manufacturing entrepreneurship and spatial scope of agglomeration economies in the context of a developing country. Using microgeographic data for all Brazilian manufacturing activities and distance‐based measures, we find clear patterns of colocalization between entrants and existing establishments, and that these patterns occur mainly at short distances. For activities presenting colocalization between entrants and existing establishments, our results also indicate that a greater number of incumbent establishments in a given location positively affects the number of entrant establishments that decide to locate there, an effect that attenuates rapidly with distance (generally disappearing after 5 km). This pattern of attenuation is robust to both the inclusion of a comprehensive set of controls for observable and unobservable local characteristics and the use of instrumental variables to address remaining endogeneity concerns. [ABSTRACT FROM AUTHOR]

This paper aims at estimating the regional and sectoral impacts of the Covid‐19 pandemic in the state of Sergipe, Brazil in 2020. We use an input‐output model with partial hypothetical extraction. The main results suggest a significant reduction in economic activity in the state, particularly in the Transport and Industry sectors. On the other hand, the Real estate and Food and Accommodation sectors have a greater capacity for recovery with the introduction of an emergency aid program. The municipalities with the largest absolute impact on gross domestic product are Aracaju, Canindé de São Francisco and Nossa Senhora do Socorro, two of them located in the metropolitan area of Aracaju. [ABSTRACT FROM AUTHOR]

Numerical models have been developed to investigate and understand responses of biogeochemical cycle to global changes. Steady state, when a system is in dynamic equilibrium, is generally required to initialize these model simulations. However, the spin‐up process that is used to achieve steady state pose a great burden to computational resources, limiting the efficiency of global modeling analysis on biogeochemical cycles. This study introduces a new Semi‐Analytical Spin‐Up (SASU) to tackle this grand challenge. We applied SASU to Community Land Model version 5 and examined its computational efficiency and accuracy. At the Brazil site, SASU is computationally 7 times more efficient than (or saved up to 86% computational cost in comparison with) the traditional native dynamics (ND) spin‐up to reach the same steady state. Globally, SASU is computationally 8 times more efficient than the accelerated decomposition spin‐up and 50 times more efficient than ND. In summary, SASU achieves the highest computational efficiency for spin‐up on site and globally in comparison with other spin‐up methods. It is generalizable to wide biogeochemical models and thus makes computationally costly studies (e.g., parameter perturbation ensemble analysis and data assimilation) possible for a better understanding of biogeochemical cycle under climate change. Plain Language Summary: Land carbon cycle models, a critical component of earth system models, have been developed to investigate and understand ecological responses to global changes. However, the model spin‐up process to achieve steady state are usually time‐consuming and pose great computational burden. The spin‐up problem hinders our ability to study some key issues in land carbon cycle modeling, such as sensitivity analysis. This paper applies a new SASU framework to accelerate spin‐up of Community Land Model matrix version 5. Compared with traditional native dynamic approach, SASU speeds up the spin‐up by approximately 50 times, achieving the fastest spin‐up speed than all the previously recorded methods. Our SASU method is applicable to biogeochemical models and, therefore, liberates the models for computationally costly studies, such as parameter perturbation ensemble analysis and data assimilation. Key Points: A new semi‐analytical spin‐up (SASU) framework combines the default accelerated spin‐up method and matrix analytical algorithmSASU accelerates CLIM5 spin‐up by tens of times, becoming the fastest method to our knowledgeSASU is applicable to most biogeochemical models and enables computationally costly study, for example, sensitivity analysis [ABSTRACT FROM AUTHOR]

Copyright of Conservation Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Quantifying the contributions of distinct mineral populations in bulk magnetic experiments greatly enhances the analysis of environmental and rock magnetism studies. Here, we develop a new method of parametric unmixing of susceptibility components in hysteresis loops. Our approach is based on a modified Gamma‐Cauchy exponential model that accounts for variable skewness and kurtosis. The robustness of the model is tested with synthetic curves that examine the effects of noise, sampling, and proximity (similar coercivities) of susceptibility components. We provide a Python‐based script, the Hist‐unmix, which allows the user to adjust a forward model of up to three ferromagnetic components as well as a dia/paramagnetic contribution. Optimization of all the parameters is achieved through least squares fitting (Levenberg‐Marquardt method), with uncertainties of each inverted parameter calculated through a Monte Carlo error propagation approach. For each ferromagnetic component, it is possible to estimate the saturation magnetization (Ms), saturation remanent magnetization (Mrs) and the mean coercivity (Bc ${B}_{c}$). Finally, Hist‐unmix was applied to a set of weakly magnetic carbonate rocks from Brazil, which typically show distorted hysteresis loops (wasp‐waisted and potbellied). For these samples, we resolved two components with distinct coercivities. These results are corroborated by previous experimental data, showing that the lower branch of magnetic hysteresis can be modeled by the presented approach and might offer important mineralogical information for rock magnetic and paleomagnetic studies. Plain Language Summary: Rocks contain magnetic minerals that record Earth's varying magnetic field morphology and intensity and provide information on our planet's evolution, as well as the ancient environmental conditions where the rocks formed. To study these magnetic minerals, we need to identify and quantify them, but this is challenging because of the complex mixture of such minerals that a rock may contain. Magnetic hysteresis curves are a simple and quick measurement that provide information on the magnetic properties of a rock, reflecting the combined effects of different minerals. In this paper, we propose a mathematical model that can separate the individual contributions of each magnetic population. We also provide an open‐source Python script for users to apply our model to their own data. Key Points: A new method for the parametric unmixing of magnetic hysteresis data based on a modified Gamma‐Cauchy exponential model is presentedThe model accounts for curves with variable skewness/kurtosis, allowing the separation of dia/para and ferromagnetic contributionsAn open‐source Python script (Hist‐unmix) allows users to import, process and model their data via a friendly interface [ABSTRACT FROM AUTHOR]