ICT - Artigos
Recent Submissions
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Pushing the boundaries of VCD spectroscopy in natural product chemistry
(RSC, 2023-05-11)Vibrational circular dichroism (VCD) is one of the most powerful techniques to assess the stereochemistry of chiral molecules in solution state. The need for quantum chemical calculations to interpret experimental data, ...
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Bionanomining of copper-based nanoparticles using pre-processed mine tailings as the precursor
(Elsevier, 2023-03-28)The bacterial synthesis of copper nanoparticles emerges as an eco-friendly alternative to conventional techniques since it comprises a single-step and bottom-up approach, which leads to stable metal nanoparticles. In this ...
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Plakilactone J: Structure and absolute configuration
(Elsevier, 2022-11-12)The chemical investigation of the Brazilian marine sponge Plakortis angulospiculatus led to the isolation of the new peroxide-derived polyketide plakilactone J (1). The structure of (-)-1 was established by means of HRMS ...
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Forecast of the occupancy of standard and intensive care unit beds by COVID-19 inpatients
(IEEE, 2022-07-22)This paper proposes a methodology to forecast the number of hospital beds required by COVID-19 inpatients in mild and in critical conditions. To that end, a compartmental model is extended to include the number of critical ...
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Using low Lift-to-Drag spacecraft to perform upper atmospheric Aero-Gravity Assisted maneuvers
(Elsevier, 2022-05-21)The Gravity Assisted Maneuver has been applied in lots of space missions, to change the spacecraft heliocentric velocity vector and the geometry of the orbit, after the close approach to a celestial body, saving propellant ...
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Applying the perturbative integral in aeromaneuvers around Mars to calculate the cost
(Springer Nature, 2022-03-23)The perturbative integral method was applied to quantify the contribution of external forces during a specific interval of time in trajectories of spacecraft around asteroids and under the Luni-solar influence. However, ...
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Conformational preferences induced by cyclization in orbitides: a vibrational CD study
(Royal Society of Chemistry (RSC), 2022-01-18)Orbitides are bioactive head-to-tail natural cyclic peptides from plant species. Their bioactivity is intrinsically related to the main conformations adopted in solution, whose correct characterization represents an important ...
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How Biomining has been Used to Recover Metals from Ores and Waste? A Review
(Damir Bucković, 2021-11-18)The recovery of metals present in low-grade ores and waste of electrical and electronic equipment (WEEE) is essential for the development of new technologies and the supply of existing production chains. Conventional ...
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Biosynthesis of iron oxide nanoparticles from mineral coal tailings in a stirred tank reactor
(Gamini Senanayake, 2019-01-23)Chemical oxidation of mineral coal tailings is one of the most important environmental issues during the lifetime of a mine. The presence of sulfur compounds favors the occurrence of metal acid leaching, which contaminates ...
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A low‑cost brewery waste as a carbon source in bio‑surfactant production
(Dirk Weuster-Botz, 2021-06-22)This work aims to produce bio-surfactant using a brewery waste (trub) as a strategy to reduce production costs related to the substrate, as well as to provide an eco-friendly destination for this residue. Trub is obtained ...
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Bioconversion of low-cost brewery waste to biosurfactant: an improvement of surfactin production by culture medium optimization
(Colin Webb, 2021-05-11)Trub is the second-largest residue from brewing industry (250 thousand tons/year) and, due to the presence of high amounts of carbon and nitrogen, it is a potential source of reducing sugars and nitrogen for biological ...
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COVID-19 trend analysis in mexican states and cities
(Institute of Electrical and Electronics Engineers (IEEE), 2021-12-09)This paper presents a trend analysis of the COVID-19 pandemics in Mexico. The studies were run in a subnational basis because they are more useful that way, providing important information about the pandemic to local ...
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Vibrational circular dichroism for the assignment of absolute configuration of natural products in Brazil
(Springer, 2021-12-02)The determination of the absolute configuration of chiral bioactive natural products is a crucial step in their structural characterization. Several well-established techniques, such as X-ray crystallography, stereo-controlled ...
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Study of the COVID-19 pandemic trending behavior in Israeli cities
(International Federation of Automatic Control (IFAC), 2021-11-02)This paper studies the trending behavior of the COVID-19 dynamics in Israeli cities. The model employed is used to describe, for each city, the accumulated number of cases, the number of cases per day, and the predicted ...
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Tackling Stereochemistry in Drug Molecules with Vibrational Optical Activity
(MDPI, 2021)Chirality plays a crucial role in drug discovery and development. As a result, a significant number of commercially available drugs are structurally dissymmetric and enantiomerically pure. The determination of the exact ...
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Absolute Configuration Reassignment of Natural Products: An Overview of the Last Decade
(SBQ, 2021)The assignment of absolute configuration (AC) is a crucial step in the structural characterization of natural products, especially for those subjected to biological assays. Methods such as X-ray crystallography, stereocontrolled ...
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Information System for Epidemic Control: a computational solution addressing successful experiences and main challenges
(Emerald Publishing Limited, 22-03-21)Purpose: The SARS-CoV-2 pandemic has caused a major impact on worldwide public health and economics. The lessons learned from the successful attempts to contain the pandemic escalation revealed that the wise usage of contact ...
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A computational tool for trend analysis and forecast of the COVID-19 pandemic
(Elsevier, 2021-03-10)Purpose: This paper proposes a methodology and a computational tool to study the COVID-19 pandemic throughout the world and to perform a trend analysis to assess its local dynamics. Methods: Mathematical functions are ...
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New multicomponent forms of the antiretroviral Nevirapine with improved dissolution performance
(ACS, 2019-12-09)In the pharmaceutical area, some drugs exhibit physicochemical properties that adversely affect the formulation processes for bioavailability and effectiveness. Nevirapine (NVP) is an antiretroviral drug that presents low ...
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Biomining of iron-containing nanoparticles from coal tailings
(Springer Nature, 2019-07-10)Sulfur minerals originating from coal mining represent an important environmental problem. Turning these wastes into value added by-products can be an interesting alternative. Biotransformation of coal tailings into ...
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