68 research outputs found
Shedding of Marburg virus in naturally infected Egyptian rousette bats, South Africa, 2017
We detected Marburg virus RNA in rectal swab samples
from Egyptian rousette bats in South Africa in 2017. This
finding signifies that fecal contamination of natural bat
habitats is a potential source of infection for humans.
Identified genetic sequences are closely related to Ravn
virus, implying wider distribution of Marburg virus in AfricaThe South African National Research Foundation; the Poliomyelitis Research Foundation; the Division of Global Disease Detection, Center for Global Health, US Centers for Disease Control and Prevention; the US Defense Threat Reduction Agency; and the US Defense Biological Product Assurance Office.http://wwwnc.cdc.gov/eidpm2021Medical Virolog
Influência de fatores ambientais na distribuição de famílias de insetos aquáticos em rios no sul do Brasil
TIC 172900988: A transiting circumbinary planet detected in one sector of TESS data
We report the first discovery of a transiting circumbinary planet detected from a single sector of Transiting Exoplanet Survey Satellite (TESS) data. During Sector 21, the planet TIC 172900988b transited the primary star and then five days later it transited the secondary star. The binary is itself eclipsing, with a period P ≈ 19.7 days and an eccentricity e ≈ 0.45. Archival data from ASAS-SN, Evryscope, KELT, and SuperWASP reveal a prominent apsidal motion of the binary orbit, caused by the dynamical interactions between the binary and the planet. A comprehensive photodynamical analysis of the TESS, archival and follow-up data yields stellar masses and radii of M1 = 1.2384 ± 0.0007 Me and R1 = 1.3827 ± 0.0016 Re for the primary and M2 = 1.2019 ± 0.0007 Me and R2 = 1.3124 ± 0.0012 Re for the secondary. The radius of the planet is R3 = 11.25 ± 0.44 R (1.004 ± 0.039RJup). The planet's mass and orbital properties are not uniquely determined-there are six solutions with nearly equal likelihood. Specifically, we find that the planet's mass is in the range of 824 M3 981 M (2.65 M3 3.09MJup), its orbital period could be 188.8, 190.4, 194.0, 199.0, 200.4, or 204.1 days, and the eccentricity is between 0.02 and 0.09. At V = 10.141 mag, the system is accessible for high-resolution spectroscopic observations, e.g., the Rossiter-McLaughlin effect and transit spectroscopy
Relationships of Objective Measurements to Sensory Components Of Canned Applesauce and Apple Slices
Hereditary stomatocytosis: consistent association with an integral membrane protein deficiency
Effect of Postharvest Storage and Ripening of Apples on the Sensory Quality of Processed Applesauce
Effect of Fruit Firmness and Processing Parameters on the Particle Size Distribution in Applesauce, of Two Cultivars
Size-based variation in intertissue comparisons of stable carbon and nitrogen isotopic signatures of bull sharks (Carcharhinus leucas) and tiger sharks (Galeocerdo cuvier)
Determination of Sensory Components Accounting for Intervarietal Variation in Apple Sauce and Slices Using Factor Analysis
Sex chromosome-linked species recognition and evolution of reproductive isolation in flycatchers
Interbreeding between species (hybridization) typically produces unfit offspring. Reduced hybridization should therefore be favored by natural selection. However, this is difficult to accomplish because hybridization also sets the stage for genetic recombination to dissociate species-specific traits from the preferences for them. Here we show that this association is maintained by physical linkage (on the same chromosome) in two hybridizing Ficedula flycatchers. By analyzing the mating patterns of female hybrids and cross-fostered offspring, we demonstrate that species recognition is inherited on the Z chromosome, which is also the known location of species-specific male plumage traits and genes causing low hybrid fitness. Limited recombination on the Z chromosome maintains associations of Z-linked genes despite hybridization, suggesting that the sex chromosomes may be a hotspot for adaptive speciation.
- …