Invasive monitoring of the clinical effects of high intra-abdominal pressure for insertion of the first trocar.

Background: To analyze the effects of transitory, high intra-abdominal pressure on clinical, hemodynamic, blood gas and metabolic parameters.

Methods: Sixty-seven laparoscopic patients were divided into groups P12 (n = 30, maximum intra-abdominal pressure of 12 mmHg) and P20 (n = 37, maximum intra-abdominal pressure of 20 mmHg). Through radial artery cannulation, mean arterial pressure (MAP) was assessed and blood gas analysis – pH, arterial oxygen tension (PaO2), arterial carbon dioxide tension (PaCO2), bicarbonate (HCO3) and base excess (BE) – was performed. These parameters were evaluated in both groups at time point zero, before CO2 insufflation; at time point one (TP1), when intra-abdominal pressure of 12 mmHg was reached in both groups; at time point two (TP2), 5 minutes after reaching intra-abdominal pressure of 12 mmHg in group P12 and of 20 mmHg in group P20; and at time point three (TP3), 10 minutes after reaching intra-abdominal pressure of 12 mmHg in group P12 and 10 minutes after TP1 in group P20, when intra-abdominal pressure decreased from 20 mmHg to 12 mmHg. Values out of the normal range or the occurrence of atypical phenomena suggestive of organic disease indicated clinical changes.

Results: Significant variations in MAP, pH, HCO3 and BE were observed in group P20; these changes, however, were within normal limits. Clinical changes were also within normal limits, and no pathological phenomena were observed.

Conclusions: Brief, intra-abdominal hypertension for the insertion first trocar insertion causes variations in MAP, pH, HCO3 and BE without adverse effects, and it may protect from iatrogenic injury

Levantamento da composição da matovegetação e florística nativa em quintais diversificados.

O solo é componente chave no processo de produção de alimentos e fibras. A produtividade de quintais agroflorestais está diretamente relacionada com a manutenção e/ou construção da fertilidade do solo

Recovery of p-TBC from a butadiene washing stream in a pilot plant

Results obtained in a pilot-scale unit designed for COD removal and p-TBC (p-tert-butylcatechol) recovery from a butadiene washing stream (pH 14, 200,000 mg COD L-1, highly toxic) at a petrochemical industry are presented. By adding H3PO4, phase separation is achieved and p-TBC is successfully recovered (88 g L-1 of washing stream). Information (time for phase separation and organic phase characterization) was gathered for designing a future industrial unit. The estimated heat generation rate was 990 kJ min-1 and 15 min were enough to promote phase separation for a liquid column of approximately 1.15 m.PetroflexCNPqFUJ

Exclusive dilepton production in ultraperipheral PbPbPbPb collisions at the LHC

In this paper we perform a systematic study of the exclusive dilepton production by $\gamma \gamma$ interactions in $PbPb$ collisions at the LHC Run 2 energies considering different levels of precision for the treatment of the absorptive corrections and for the nuclear form factor. The rapidity and invariant mass distributions are estimated taking into account the experimental cutoffs and a comparison with the recent ALICE and ATLAS data for the $e^+ e^-$ and $\mu^+ \mu^-$ production is presented.Comment: 8 pages, 5 figures. Matches the improved version published in EPJ

Análise de viabilidade econômica de sistemas agroflorestais em produtores familiares no município de Marapanim, PA.

Na Amazônia, a busca por uma agricultura sustentável, fundamentada em tecnologias não agressivas ao meio ambiente, tem apontado o desenvolvimento dos Sistemas Agroflorestais (SAFs) como uma alternativa viável pela combinação de árvores, culturas e animais em um conceito de imitação dos ecossistemas naturais. O objetivo do trabalho foi avaliar a viabilidade econômica de SAFs implantados em área de agricultores familiares no município de Marapanim, Pará. As informações socioeconômicas dos produtores e dos sistemas foram levantadas através de questionário de perguntas abertas e fechadas. A análise da viabilidade econômica foi determinada pelos indicadores econômicos: Taxa interna de retorno (TIR), Valor presente líquido (VPL), ?Payback? atualizado e Relação benefício/custo (B/C). A taxa anual de juros utilizada foi de 4%. A viabilidade dos SAFs foi analisada para a situação de 10 anos e na estimativa futura de 20 anos após sua implantação. Todos os SAFs apresentam VPL positivo, relação B/C maiores que 1 (um) e TIR maiores que a taxa utilizada como base (4%), indicando a viabilidade dos SAFs. O ?Payback? ficou na média de 8 anos, expondo que o retorno de fato dos custos poderão vir dentro desse período

Food Insecurity Levels among University Students: A Cross-Sectional Study

Background: University students may be vulnerable to food insecurity (FI) due to limited financial resources, lower purchasing power, and increasing housing and food costs. This study aimed to assess the prevalence and severity of FI and its associated factors among university students attending a public Portuguese university. Methods: A cross-sectional survey was designed, and data were collected using a self-reported online questionnaire validated for the Portuguese population. The study population included students from all levels of study and the assessments were conducted during the winter semester (December 2021 to February 2022). Chi-square tests were used to determine the associations between FI and sociodemographic variables. Bivariate logistic regression was further used to assess factors associated with FI. Results: From the 284 participants, 17.3% of students were classified as food insecure, consisting of 14.1% with mild FI, 2.1% with moderate FI, and 1.1% with severe FI. FI was significantly associated with nationality (p = 0.028) and the number of unemployed household members (p = 0.001). In comparison to Portuguese students, students of other nationalities were 4.1 times more likely to be food insecure (OR = 4.089, 95% CI:1.057–15.821, p = 0.041). Students in households with a higher number of members (OR = 2.537, 95% CI:1.231–5.230, p = 0.012) and a higher number of unemployed members (OR = 3.192, 95% CI:1.681–6.059, p < 0.001) were also 2.5 and 3.1 times more likely, respectively, to be food insecure. Conclusions: This study provides an insight into the FI levels of university students in a Portuguese university. Further future studies are needed to use objective measures of food insecurity (availability, access, and utilization of food) and explore interventions addressing food insecurity in this population. © 2022 by the authors.The CECAV is supported by FCT/UIDB/CVT/00772/2020. The CITAB is supported by FCT/UIDB/04033/2020

Tristeza parasitária bovina: carrapato.

bitstream/item/26133/1/f-06.pd