Pyrolysis-gass chromatography-mass spectrometry of soil humic fractions: II. The high boiling point compounds

4 pages, 1 figure, 1 table, 16 references.-- Publicado en el apartado: Division S-3-Soil Microbiology and Biochemistry.Pyrolysis-gas chromatography-mass spectrometry studies of soil fulvic and humic acids were made. The high boiling point compounds produced by pyrolysis were separated in a column packed with Chromosorb AW DMCS 80-100 mesh coated with 10% FFAP. Humic acids with a high nitrogen content yielded a complex variety of protein derivatives, such as alkylpyridines, alkylpyrroles, alkylbenzonitriles, indoles, piperidines, pyrazines, and pyrrolidones. Humic acids with low N content yielded a smaller number of heterocyclic nitrogen compounds. Lignin derivatives were also identified, but the amount varied in different samples. Furanes were not as prominent as protein and lignin fragments. Acid hydrolysis released proteins, polysaccharides, and lignins, which could be considered as companion materials of a humic "core". The majority of the pyrolysis compounds from the residue after hydrolysis were identified as alkylbenzenes, alkylnaphthalenes, phenols, benzofuranes, indenes, and fluorenes. Alkanes and alkenes were noted in trace amounts. Pyrolysis behavior of fulvic acids differed from that of humic acids. They produced poorly resolved pyrograms with smaller number and a lower intensity of peaks, from which only furfurals, phenols, benzofuranes, and naphthalenes could be identified.Peer reviewe

Internet Safety and Security Surveys - A Review

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Adding Salt to Pepper: A Structured Security Assessment over a Humanoid Robot

The rise of connectivity, digitalization, robotics, and artificial intelligence (AI) is rapidly changing our society and shaping its future development. During this technological and societal revolution, security has been persistently neglected, yet a hacked robot can act as an insider threat in organizations, industries, public spaces, and private homes. In this paper, we perform a structured security assessment of Pepper, a commercial humanoid robot. Our analysis, composed by an automated and a manual part, points out a relevant number of security flaws that can be used to take over and command the robot. Furthermore, we suggest how these issues could be fixed, thus, avoided in the future. The very final aim of this work is to push the rise of the security level of IoT products before they are sold on the public market.Comment: 8 pages, 3 figures, 4 table

Safety and efficacy of Bolus administration of magnesium sulphate for preeclampsia

Context: Magnesium sulphate is currently the drug of choice in the prevention and treatment of eclampsia. On-going research is addressing its administration in terms of dosage, duration and safety.Objective: We evaluated a modified method of magnesium sulphate administration with respect to safety, efficacy and maternofetal outcome.Design, Setting And Subjects: This was a prospective cohort study conducted at the UBTH, Benin City with patients managed for severe preeclampsia between June and December, 2011. The Zuspan regimen was compared with a modified intravenous regimen in which magnesium maintenance therapy was given as 1g hourly bolus injection administered over 10 minutes. Both methods were evaluated for safety, efficacy and materno-fetal outcome.Result: The mean age, parity, gestational age and body mass index were 28.09±5.5 years, 2.72±1.98, 36.67±3.54 weeks and 26.51±5.60 respectively. Both methods achieved therapeutic levels, but blood pressure control was better in the continuous group than the bolus group (27% vs 100%, P=0.000). Birth asphyxia occurred in 14.8% of the babies and was 3 times more in the continuous group (22% vs 7.5%; p=0.062). More babies in the bolus group were admitted to SCBU (54.1% vs 7.9%; p=0.000). There was no early neonatal death, and no maternal death in the first week of puerperium.Conclusion: This study showed that hourly bolus intravenous administration of magnesium sulphate is comparable to continuous intravenous therapy in terms of safety and efficacy in the treatment of severe preeclampsia. A larger scale study is recommended to further confirm our findings.Keywords: safety, efficacy, bolus magnesium sulphate, preeclampsia, University of Benin Teaching HospitalTrop J Obstet Gynaecol, 30 (1), April 201

KEYNOTE ADDRESS - From Student to Educator: The Evolution of Diversity and Inclusion

During this interactive presentation, Dr. Lucero will share her experiences as a woman of color with hearing loss and a deaf educator; through her storytelling, the audience will reflect on how evolving perspectives on diversity and inclusion have informed current practices in deaf education

From Student to Educator: Reflecting on the Evolution of Diversity and Inclusion in Deaf Education

What is now considered best practices for working with culturally and linguistically diverse families and in inclusive education in deaf education has changed drastically from what was in place in 1979 when Renee Lucero was diagnosed with a hearing loss. During this interactive presentation, we will reflect on how evolving perspectives on diversity and inclusion have informed current practices in deaf education. Dr. Lucero will share her personal and professional experiences as a woman of color with hearing loss and a deaf educator to demonstrate how much the landscape of deaf education has changed in recent decades. As a result of this activity, participants will be able to: Summarize evidence-informed practices when serving culturally and linguistically diverse families Identify at least three new evidence-informed practices to directly implement into their own teaching Describe the evolution of best practices in diversity and inclusive education in deaf educatio

Impact assessment of mechanical harvest on fruit physiology and consequences on oil physicochemical and sensorial quality from ‘Manzanilla de Sevilla’ and ‘Manzanilla Cacereña’ super-high density hedgerows. A preliminary study

BACKGROUND Super-intensive cultivation facilitates olive mechanized harvesting, allowing substantial savings in the production cost of virgin olive oil (VOO). However, the number of varieties adapted to this type of cultivation is small. This study explores the impact that harvesting with a grape straddle harvester of ‘Manzanilla de Sevilla’ and ‘Manzanilla Cacereña’ olives grown in super-intensive cultivation has on the physiology of the fruit and the quality of the oil subsequently extracted. RESULTS For both cultivars, fruits harvested mechanically showed higher respiration and ethylene production and lower firmness than fruits harvested by hand. Their oils exhibited lower phenol contents, lower oxidative stability and lower presence of positive sensory attributes. However, in these oils the values of parameters used to assess the level of quality of VOO remained within the limits required for the best commercial category. CONCLUSION Mechanical harvesting of ‘Manzanilla de Sevilla’ and ‘Manzanilla Cacereña’ super-high-density hedgerows induced physiological alterations in the fruits and a reduction in the contents of natural antioxidants and flavour components in the oils, though it did not result in a loss of the ‘Extra’ level of quality. © 2014 Society of Chemical IndustryFEDER AGL2011-30371-C02-0

Moving to another world: understanding the impact of clinical trial closure on research participants living with HIV in Uganda

Despite an increasing need for clinical trials involving people living with HIV (PLWH), little is known about how PLWH experience trial closure, particularly in low-income countries, where the majority of trials take place. We sought to explore the impact of trial closure on PLWH in Uganda. This was an interpretive, grounded theory study using in-depth interviews, conducted between October 2014 and August 2015. Adult participants (N = 23) from 3 trials were included. The findings indicated that trial closure was represented as “moving to another world” and was an emotional transition, linked to a loss of quality care in the research environment, the need to find alternative health facilities, fear of experiencing unwanted side effects, a desire to receive trial feedback, and difficulties linking to posttrial care. We concluded that PLWH leaving trials in a resource-limited setting required holistic care to facilitate their transition back to “usual care.