Results 61 to 70 of about 2,586 (200)

Modeling Ice and Dust in Comet C/2017 K2 (Pan-STARRS)’s Coma

The Planetary Science Journal
C/2017 K2 (Pan-STARRS) is a long-period comet that has been active since 24 au inbound and likely as far out as 35 au, far beyond where the sublimation of water ice can power cometary activity.
Megan Firgard, Theodore Kareta
doaj   +1 more source

Von Willebrand Factor and ADAMTS13 in Relation to Atherosclerosis in the General Population: The Rotterdam Study

European Journal of Haematology, EarlyView.
ABSTRACT Background Higher von Willebrand factor (VWF) levels and lower ADAMTS13 activity are linked to increased risk of atherosclerotic cardiovascular disease, but their association with atherosclerosis burden, a potential underlying mechanism, remains unclear.
Mitra Nekouei Shahraki, Frank W. G. Leebeek, Moniek P. M. de Maat, Maryam Kavousi, Daniel Bos   +4 more
wiley   +1 more source

A Potential Signature of HD 7977’s Passage among Observed Long-period Comet Orbits

The Planetary Science Journal
It is generally presumed that the tidal field of the Milky Way’s disk is the main perturbation that has driven observed long-period comets (LPCs) from the Oort cloud into the inner solar system.
Nathan A. Kaib, Sean N. Raymond
doaj   +1 more source

Compromised DNA replication in gut cells underlies sensitivity to genotoxic stress in the tardigrade Hypsibius exemplaris

The FEBS Journal, EarlyView.
DNA damage in the tardigrade Hypsibius exemplaris elicits distinct cellular outcomes depending on replication status. While non‐replicating cells tolerate genotoxic stress, constitutively replicating cells undergo irreversible replication failure upon DNA damage, leading to loss of tissue homeostasis, fat depletion, sterility, and organismal death ...
Gonzalo Quiroga‐Artigas, Pauline Fontanié, Benjamin Lacroix, Maria Dolores Molina, María Moriel‐Carretero   +4 more
wiley   +1 more source

The correspondence of Giovanni Santini and Giuseppe Lorenzoni, directors of the Astronomical Observatory of Padua in the 19th century

Annals of Geophysics, 2009
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Times;">Giovanni Santini was appointed director of the Astronomical Observatory of Padova from 1817 to 1877. His scientific correspondence covers a period from 1807 to 1874. Most of the letters
Luisa Pigatto
doaj   +1 more source

Digital analysis of spatial expression of stromal fibroblast activation protein alpha (FAP) in DCIS

Histopathology, EarlyView.
Digital analysis of FAP expression in DCIS revealed a higher FAP level around DCIS with nearby invasion, comparable to invasive carcinoma. High FAP correlated with nuclear grade, papillary DCIS and HER2 subtype, showing prognostic potential. Introduction The presence of non‐progressing ductal carcinoma in situ (DCIS) cases has raised concerns of ...
Ka Long Leung, Ronald C Chan, Conrad H Lee, Ngou‐Men Wong, Monalyn Marabi, Shirley K Jamidi, Yun‐Bi Ni, Julia Y Tsang, Man‐Chi Eric Fu, Dajiang Guo, Gary M Tse   +10 more
wiley   +1 more source

Cometary Dynamics—Formation and Evolution of the Oort Cloud

Astronomy
In this review, the formation of the Oort Cloud is illuminated from several aspects. One is the history of the subject with an outline of the fundamental discoveries by Öpik, Oort and Hills. It is argued that the basic reason for judging Oort as the real
Hans Rickman
doaj   +1 more source

The Origins of Ploem's Filter Cube: A Pandora's Box

Journal of Microscopy, EarlyView.
Abstract Ploem's filter cube, central to modern epifluorescence microscopy, integrates three matched optical components: an excitation filter, an emission filter, and a dichroic mirror. Together, these elements enable the separation of excitation and emission light paths, producing high‐contrast fluorescence images.
Jack Gordon, Kaleah Balcomb, Vinod Maseedupally, Maitreyee Roy   +3 more
wiley   +1 more source

The Effect of Dwarf’s Planets Pluto and Eris upon Long Period Comets

Journal of Kufa-Physics, 2017
The orbit of long period comets overlapped with that of dwarf’s planet Pluto and Eris. The gravitational effects arise from dwarf’s planets as well as the eight planets   have been involved in orbits calculations.
Hayder Hasan Jawad
doaj  

A description of dental microanatomy and implantation geometry in Chamaeleonidae

Journal of Anatomy, EarlyView.
A reassessment of the dental histology in adult chamaeleons reveals the presence of periodontal ligament. Alongside alveolar bone and cementum, these tissues together constitute a compacted and remodelled tripartite periodontium. Our findings include the novel observation of plicidentine‐like protuberances of dentine within underlying bone.
Giles D. Sukkert, Ilaria Paparella, Michael R. Doschak, Aaron R. H. LeBlanc, Michael W. Caldwell   +4 more
wiley   +1 more source