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"Silva, Dan"
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Spider-geddon
Spider-geddon is here!! The end of all Spiders doesn't exclude the star of the most anticipated video game.How does he enter the Marvel Universe and what role will he play in the final chapter of Spider-verse?
BOOK
The Verlinde traces for SUX(2,ξ) and blow-ups
Given a compact Riemann surface
X
of genus at least 2 with automorphism group
G
, we provide formulae that enable us to compute traces of automorphisms of
X
on the space of global sections of
G
-linearized line bundles defined on certain blow-ups of projective spaces along the curve
X
. The method is an adaptation of one used by Thaddeus to compute the dimensions of those spaces. In particular, we can compute the traces of automorphisms of
X
on the Verlinde spaces corresponding to the moduli space
S
U
X
(
2
,
ξ
)
when
ξ
is a line bundle
G
-linearized of suitable degree.
Journal Article
Teen Titans. Volume 5, The trial of Kid Flash
\"When Titans Fall. He trained under the Dark Knight himself. But then Red Robin stepped out from under the Batman's shadow to start a new team of teenaged heroes like himself. As the Teen Titans, they battled against threats no other, older team could face. He never could have imagined that their greatest threats would come from within. Spinning out of the events of \"Forever Evil,\" the team is lost in the timestream, repeatedly slammed together only to be torn apart again. Superboy has been targeted by the murderous Son of Superman he was cloned from. Raven's deal with her devilish father Trigon--her freedom for the Titans' soul--has almost been sealed. And the carefree crimefighter called Kid Flash is about to be called to account for crimes that defy comprehension. As the trial of the friend and hero they thought they knew nears its dreaded verdict, the Teen Titans will be forced to make a fateful decision. Will they stand together-- or fall apart?\" -- page 4 of cover.
Book
The Verlinde traces for$$SU_{X}(2,\\xi )$$and blow-ups
Given a compact Riemann surface X of genus at least 2 with automorphism group G , we provide formulae that enable us to compute traces of automorphisms of X on the space of global sections of G -linearized line bundles defined on certain blow-ups of projective spaces along the curve X . The method is an adaptation of one used by Thaddeus to compute the dimensions of those spaces. In particular, we can compute the traces of automorphisms of X on the Verlinde spaces corresponding to the moduli space$$SU_{X}(2,\\xi )$$S U X ( 2 , ξ ) when$$\\xi $$ξ is a line bundle G -linearized of suitable degree.
Journal Article
Activity concentration of natural radionuclides (238U, 226Ra, 232Th, 228Ra and 40K) in lettuce cultivated in soil amended with niobium tailings
This study evaluates the possible agricultural application of calcium carbonate derived from niobium extraction. This carbonate is stored in dams, and it is enriched with radionuclides from
232
Th series, which imposes restrictions on its use. Activity concentration evaluation in soil was performed before the tillage of lettuce (
Lactuca sativa L.
) and the soil–plant transfer factor was determined. Results showed the dilution factor applied to the carbonate in the soil causes insignificant increments in soil activity concentration. In cultivated lettuce, high activity concentrations of
228
Ra and
226
Ra were found independently when using either the control or carbonate amended soil.
Journal Article
Chemical Composition and Antifungal In Vitro and In Silico, Antioxidant, and Anticholinesterase Activities of Extracts and Constituents of Ouratea fieldingiana (DC.) Baill
Ouratea fieldingiana (Gardner) Engl is popularly used for wound healing. This study describes the main chemical compounds present in extracts of O. fieldingiana and evaluates their biological potential by investigating antifungal, antioxidant, and anticholinesterase activities. The action mechanism of main antifungal compound was investigated by molecular docking using the enzyme sterol 14-α demethylase, CYP51, required for ergosterol biosynthesis. The seeds and leaves were extracted with ethanol in a Soxhlet apparatus and by maceration, respectively. Both extracts were subjected to silica gel column chromatography for isolation of main constituents, followed by purification in sephadex. The structures of compounds were established by 1H and 13C-NMR spectroscopy and identified by comparison with literature data as amentoflavone and kaempferol 3-O-rutinoside, respectively. The antioxidant activities of the extracts were determined by the DPPH and ABTS free radical inhibition methods. In general, the extracts with the highest antioxidant activity corresponded to those with higher content of phenolic compounds and flavonoids. The ethanol extracts and two isolated compounds presented relevant antifungal activity against several Candida strains. The in silico findings revealed that the compound amentoflavone coupled with the CYP450 protein due to the low energy stabilization (-9.39 kcal/mol), indicating a possible mechanism of action by inhibition of the ergosterol biosynthesis of Candida fungi.
Journal Article
A large‐scale assessment of ant diversity across the Brazilian Amazon Basin: integrating geographic, ecological and morphological drivers of sampling bias
Tropical ecosystems are often biodiversity hotspots, and invertebrates represent the main underrepresented component of diversity in large‐scale analyses. This problem is partly related to the scarcity of data widely available to conduct these studies and the lack of systematic organization of knowledge about invertebrates' distributions in biodiversity hotspots. Here, we introduce and analyze a comprehensive data compilation of Amazonian ant diversity. Using records from 1817 to 2020 from both published and unpublished sources, we describe the diversity and distribution of ant species in the Brazilian Amazon Basin. Further, using high‐definition images and data from taxonomic publications, we build a comprehensive database of morphological traits for the ant species that occur in the region. In total, we recorded 1067 nominal species in the Brazilian Amazon Basin, with sampling locations strongly biased by access routes, urban centers, research institutions and major infrastructure projects. Large areas where ant sampling is non‐existent represent about 52% of the basin and are concentrated mainly in the northern, southeastern and western Brazilian Amazon. We found that distance to roads is the main driver of ant sampling in the Amazon. Contrary to our expectations, morphological traits had lower predictive power in predicting sampling bias than purely geographic variables. However, when geographic predictors were controlled, habitat stratum and traits contribute to explain the remaining variance. More species were recorded in better‐sampled areas, but species richness estimation models suggest that areas in southern Amazonian edge forests are associated with especially high species richness. Our results represent the first trait‐based, large‐scale study for insects in Amazonian forests and a starting point for macroecological studies focusing on insect diversity in the Amazon Basin.
Journal Article
Common ant species dominate morphospace: unraveling the morphological diversity in the Brazilian Amazon Basin
Rare plant and vertebrate species have been documented to contribute disproportionately to the total morphological structure of species assemblages. These species often possess morphologically extreme traits and occupy the boundaries of morphological space. As rare species are at greater risk of extinction than more widely distributed species, human‐induced disturbances can strongly affect ecosystem functions related to assemblage morphology. Here, we assess to what extent the distributions of ant morphological traits are supported by morphologically extreme species and how they are distributed among habitats in a global biodiversity hotspot, the Brazilian Amazon. We used a morphological database comprising 15 continuous morphological traits and 977 expert‐validated ant species distributed across the Brazilian Amazon. We produced species range estimates using species distribution models or alpha hulls (when few records were available). Next, we conducted a principal components analysis to combine traits into a space with reduced dimensionality (morphospace). Then, we identified morphologically extreme species in this space and quantified their contributions to morphological diversity across different habitat types in the Brazilian Amazon Basin. We identified 114 morphologically extreme ant species across the Amazon ant morphospace. These species also accounted for a large percentage of morphospace filling, exceeding 99% representation in the most disturbed habitats in the Amazon. Our results suggest that a few morphologically extreme species capture most of the variation in ant morphology and, therefore, the spectrum of ecosystem functions performed by ants in the Brazilian Amazon Basin. Further, unlike in many other groups, these extreme morphologies were represented by the set of most common species. These results suggest greater functional redundancy and resilience in Brazilian Amazon ants, but more broadly, they contribute to our understanding of ecological processes that sustain ecosystem functions.
Journal Article
The Lancet Commission on global mental health and sustainable development
[...]mental health services should be scaled up as an essential component of universal health coverage and should be fully integrated into the global response to other health priorities, including non-communicable diseases, maternal and child health, and HIV/AIDS. [...]barriers and threats to mental health need to be addressed; these include the lack of awareness of the value of mental health in social and economic development, the lack of attention to mental health promotion and protection across sectors, the severe demand-side constraints for mental health care caused by stigma and discrimination, and the increasing threats to mental health due to global challenges such as climate change and growing inequality. [...]mental health needs to be protected by public policies and developmental efforts; these intersectoral actions should be undertaken by each country's leaders to engage a wide range of stakeholders within and beyond health, including sectors in education, workplaces, social welfare, gender empowerment, child and youth services, criminal justice and development, and humanitarian assistance. [...]investments in research and innovation should grow and harness novel approaches from diverse disciplines such as genomics, neuroscience, health services research, clinical sciences, and social sciences, both for implementation research on scaling up mental health interventions and for discovery research to advance understanding of causes and mechanisms of mental disorders and develop effective interventions to prevent and treat them.
Journal Article
Geoengineering and Climate Change Polarization: Testing a Two-Channel Model of Science Communication
The cultural cognition thesis posits that individuals rely extensively on cultural meanings in forming perceptions of risk. The logic of the cultural cognition thesis suggests that a two-channel science communication strategy, combining information content (\"Channel 1\") with cultural meanings (\"Channel 2\"), could promote open-minded assessment of information across diverse communities. We test this kind of communication strategy in a two-nation (United States, n = 1,500; England, n = 1,500) study, in which scientific information content on climate change was held constant while the cultural meaning of that information was experimentally manipulated. We found that cultural polarization over the validity of climate change science is offset by making citizens aware of the potential contribution of geoengineering as a supplement to restriction of CO2 emissions. We also tested the hypothesis, derived from a competing model of science communication, that exposure to information on geoengineering would lead citizens to discount climate change risks generally. Contrary to this hypothesis, we found that subjects exposed to information about geoengineering were slightly more concerned about climate change risks than those assigned to a control condition.
Journal Article