Is enamel the only reliable hard tissue for sex metric estimation of burned skeletal remains in biological anthropology?

Sex diagnosis is a crucial element in the analysis of skeletal remains from forensic and archaeological contexts. Thus, researchers have developed several methods using different anatomical regions to estimate sex. Despite such variety of methods, sexing of collective cremated human skeletal remains is still challenging due to heat-induced size changes and fragmentation, along with the typical commingling of collective contexts. This study aims to examine the potential of burned tooth crowns for odontometric sex estimation. To that end, heat-induced size changes were quantified in experimentally heated teeth. Then, odontometric sex estimation was performed in a set of theoretical samples of pre and post-heated tooth crowns. Results show heated tooth crowns undergo variable but consistent and statistically significant expansion, which is due to micro-fracturing. Such heat induced size changes are of sufficient magnitude to impact odontometric sex diagnosis and sex ratios of the theoretical samples. Yet, sexing using heated/burned tooth crowns may still be useful to estimate the minimum number of females in a given sample. Further, the effect of heat-induced size changes may be calculated and removed using mu CT scanning.Portuguese Foundation for Science and TechnologyPortuguese Foundation for Science and Technology [SFRH/BPD/84268/2012, SFRH/BD/139158/2018, UID/MULTI/00070/2013, PTDC/EPH-ARQ/0798/2014, PTDC/IVC-ANT/1201/2014, POCI-01-0145-FEDER016766, PEst-OE/SADG/UI0283/2013][UID/ECI/04028/2013]info:eu-repo/semantics/publishedVersio

Desenvolvimento físico, sexual e fisiologia reprodutiva da prole feminina de ratas diabéticas

OBJECTIVES: The objective of this study was to evaluate physical and sexual development and reproductive physiology in female rat offspring that developed in hyperglycemia conditions in utero and during lactation. MATERIALS AND METHODS: Maternal diabetes was induced in female rats by a single IV injection of streptozotocin before mating. Female offspring development was evaluated by means of the following parameters: physical development; age of vaginal opening and first estrus; weight and histological evaluation of uterus and ovaries; duration of the estrous cycle, sexual behavior, and fertility after natural mating. RESULTS: In the female offspring, maternal diabetes caused delays in initial physical development; diminution in ovary weight and number of follicles; and inferior reproductive performance compared with the control group. CONCLUSIONS: The exposure to hyperglycemia in uterus and during lactation caused delays in physical and sexual development, and affected the reproductive physiology of female rats negatively560296103FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP04/12948-0; 04/15664-2OBJETIVOS: O objetivo deste estudo foi avaliar o desenvolvimento físico e sexual e a fisiologia reprodutiva de ratas que se desenvolveram em condições hiperglicêmicas in utero e lactação. MATERIAIS E METODOS: Para induzir o diabetes nas ratas, foi utilizada estreptozotocina em dose única via intravenosa antes do acasalamento. A prole feminina foi avaliada por meio dos seguintes parâmetros: o desenvolvimento físico; a idade de abertura vaginal e do primeiro estro, peso e avaliação histológica do útero e ovários; a duração do ciclo estral, o comportamento sexual e a fertilidade após acasalamentos naturais. RESULTADOS: O diabetes materno provocou, na prole feminina, retardo no desenvolvimento físico; diminuição do peso dos ovários e do número de folículos; a performance reprodutiva foi inferior à do grupo controle. CONCLUSÕES: Concluiu-se que a exposição aos meios intrauterino e lactacional hiperglicêmicos provocou retardo no desenvolvimento físico e sexual e prejudicou a fisiologia reprodutiva de ratasFundunesp, Proc. 01089/0

Interaction between humic substances and metallic ions: a selectivity study of humic substances and their possible therapeutic application

The complexation capacity of humic substances extracted from peat samples taken from the Mogi River in Ribeirao Preto, SP, Brazil, was determined using metal ions (Al(III), Pb(II), Cr(VI) and Cd(II)), yielding the following order of affinity: Cr(VI)< Cd(II)<Pb(II)<Al(III). An oral LD50 test showed that these humic substances are nontoxic up to a maximum concentration of 512 mg kg-1. These findings reinforce the possibility of using humic substances as a metal detoxicant. ©2007 Sociedade Brasileira de Química

Tobacco extract in the control of the mealworm beetle in aviaries

O objetivo deste trabalho foi avaliar o efeito do extrato de tabaco no controle do besouro cascudinho [Alphitobius diaperinus (Coleoptera: Tenebrionidae)] de aviário. O experimento foi conduzido em delineamento inteiramente casualizado, com quatro tempos de contato (2½, 5, 7½ e 10 min) e quatro concentrações do extrato de tabaco (0, 25, 50 e 75% de diluição). O tempo de contato e as diluições do extrato foram independentes; entretanto, o tempo de contato exerceu maior influência na mortalidade do inseto. O extrato de tabaco tem potencial inseticida no manejo de aviários, mas testes de toxicidade devem ser realizados com as aves.The objective of this work was to evaluate the effect of tobacco extract on the control of the mealworm beetle [Alphitobius diaperinus (Coleoptera: Tenebrionidae)] in aviaries. The experiment was carried out in a completely randomized design, using four contact times (2½, 5, 7½, and 10 min) and four tobacco extract concentrations (0, 25, 50, and 75% dilution). The contact time and the dilution of the extract were independent; however, contact time had greater effect on insect mortality. The tobacco extract has insecticide potential in the management of aviaries, but toxicity tests should be performed on the birds

RESPOSTA DE HÍBRIDOS DE MILHO A DIFERENTES ESPAÇAMENTOS ENTRE LINHAS

O objetivo deste estudo foi avaliar o efeito da redução do espaçamento entre linhas sobre o rendimento e componentes do rendimento de grãos e sobre outras características agronômicas de híbridos de milho no cerrado de Mato Grosso do Sul. O experimento foi realizado na Universidade Estadual de Mato Grosso do Sul – Unidade Universitária de Aquidauana, sendo o solo classificado como Argissolo Vermelho Amarelo distrófico. O delineamento experimental utilizado foi o de blocos completos casualizados em esquema fatorial (7x2), com quatro repetições. Os tratamentos foram compostos pelas combinações de dois espaçamentos (0,45 e 0,90 m) e por sete híbridos de milho (AG 8088, AG 9040, CD 308, 2B587, Fórmula, DG 501 e BG 7049). Os resultados indicam não haver interação entre os espaçamentos e os híbridos e que no espaçamento de 0,45 m houve incremento no número de grãos por espiga, diâmetro da espiga, comprimento da espiga e produtividade

Effect of surgical experience and spine subspecialty on the reliability of the {AO} Spine Upper Cervical Injury Classification System

OBJECTIVE The objective of this paper was to determine the interobserver reliability and intraobserver reproducibility of the AO Spine Upper Cervical Injury Classification System based on surgeon experience (&lt; 5 years, 5–10 years, 10–20 years, and &gt; 20 years) and surgical subspecialty (orthopedic spine surgery, neurosurgery, and "other" surgery). METHODS A total of 11,601 assessments of upper cervical spine injuries were evaluated based on the AO Spine Upper Cervical Injury Classification System. Reliability and reproducibility scores were obtained twice, with a 3-week time interval. Descriptive statistics were utilized to examine the percentage of accurately classified injuries, and Pearson’s chi-square or Fisher’s exact test was used to screen for potentially relevant differences between study participants. Kappa coefficients (κ) determined the interobserver reliability and intraobserver reproducibility. RESULTS The intraobserver reproducibility was substantial for surgeon experience level (&lt; 5 years: 0.74 vs 5–10 years: 0.69 vs 10–20 years: 0.69 vs &gt; 20 years: 0.70) and surgical subspecialty (orthopedic spine: 0.71 vs neurosurgery: 0.69 vs other: 0.68). Furthermore, the interobserver reliability was substantial for all surgical experience groups on assessment 1 (&lt; 5 years: 0.67 vs 5–10 years: 0.62 vs 10–20 years: 0.61 vs &gt; 20 years: 0.62), and only surgeons with &gt; 20 years of experience did not have substantial reliability on assessment 2 (&lt; 5 years: 0.62 vs 5–10 years: 0.61 vs 10–20 years: 0.61 vs &gt; 20 years: 0.59). Orthopedic spine surgeons and neurosurgeons had substantial intraobserver reproducibility on both assessment 1 (0.64 vs 0.63) and assessment 2 (0.62 vs 0.63), while other surgeons had moderate reliability on assessment 1 (0.43) and fair reliability on assessment 2 (0.36). CONCLUSIONS The international reliability and reproducibility scores for the AO Spine Upper Cervical Injury Classification System demonstrated substantial intraobserver reproducibility and interobserver reliability regardless of surgical experience and spine subspecialty. These results support the global application of this classification system

Adolescent transport and unintentional injuries: a systematic analysis using the Global Burden of Disease Study 2019

Background: Globally, transport and unintentional injuries persist as leading preventable causes of mortality and morbidity for adolescents. We sought to report comprehensive trends in injury-related mortality and morbidity for adolescents aged 10–24 years during the past three decades. Methods: Using the Global Burden of Disease, Injuries, and Risk Factors 2019 Study, we analysed mortality and disability-adjusted life-years (DALYs) attributed to transport and unintentional injuries for adolescents in 204 countries. Burden is reported in absolute numbers and age-standardised rates per 100 000 population by sex, age group (10–14, 15–19, and 20–24 years), and sociodemographic index (SDI) with 95% uncertainty intervals (UIs). We report percentage changes in deaths and DALYs between 1990 and 2019. Findings: In 2019, 369 061 deaths (of which 214 337 [58%] were transport related) and 31·1 million DALYs (of which 16·2 million [52%] were transport related) among adolescents aged 10–24 years were caused by transport and unintentional injuries combined. If compared with other causes, transport and unintentional injuries combined accounted for 25% of deaths and 14% of DALYs in 2019, and showed little improvement from 1990 when such injuries accounted for 26% of adolescent deaths and 17% of adolescent DALYs. Throughout adolescence, transport and unintentional injury fatality rates increased by age group. The unintentional injury burden was higher among males than females for all injury types, except for injuries related to fire, heat, and hot substances, or to adverse effects of medical treatment. From 1990 to 2019, global mortality rates declined by 34·4% (from 17·5 to 11·5 per 100 000) for transport injuries, and by 47·7% (from 15·9 to 8·3 per 100 000) for unintentional injuries. However, in low-SDI nations the absolute number of deaths increased (by 80·5% to 42 774 for transport injuries and by 39·4% to 31 961 for unintentional injuries). In the high-SDI quintile in 2010–19, the rate per 100 000 of transport injury DALYs was reduced by 16·7%, from 838 in 2010 to 699 in 2019. This was a substantially slower pace of reduction compared with the 48·5% reduction between 1990 and 2010, from 1626 per 100 000 in 1990 to 838 per 100 000 in 2010. Between 2010 and 2019, the rate of unintentional injury DALYs per 100 000 also remained largely unchanged in high-SDI countries (555 in 2010 vs 554 in 2019; 0·2% reduction). The number and rate of adolescent deaths and DALYs owing to environmental heat and cold exposure increased for the high-SDI quintile during 2010–19. Interpretation: As other causes of mortality are addressed, inadequate progress in reducing transport and unintentional injury mortality as a proportion of adolescent deaths becomes apparent. The relative shift in the burden of injury from high-SDI countries to low and low–middle-SDI countries necessitates focused action, including global donor, government, and industry investment in injury prevention. The persisting burden of DALYs related to transport and unintentional injuries indicates a need to prioritise innovative measures for the primary prevention of adolescent injury. Funding: Bill &amp; Melinda Gates Foundation