Results 41 to 50 of about 2,128 (236)

Origin and Evolution of Short-period Comets [PDF]

The Astrophysical Journal, 2017
Abstract Comets are icy objects that orbitally evolve from the trans-Neptunian region into the inner solar system, where they are heated by solar radiation and become active due to the sublimation of water ice. Here we perform simulations in which cometary reservoirs are formed in the early solar system and evolved over 4.5 Gyr.
Nesvorny, D., Vokrouhlicky, D., Dones, L., Levison, H. F., Kaib, N., Morbidelli, A.   +5 more
openaire   +2 more sources

EDTA‐Functionalized Nanoscale Metal–Organic Framework for Onco‐Cardiology via Radiochemotherapy Synergy and Spatiotemporally Matched Iron Chelation

Advanced Science, EarlyView.
Doxorubicin (DOX)‐induced cardiotoxicity is a major limitation to its broader clinical application, while cardioprotective interventions often risk reducing the anticancer efficacy of DOX. To address these challenges, this work constructs an EDTA‐functionalized metal–organic framework that enhances tumor therapy and provides efficient cardioprotection ...
Daojing Yuan, Liyang Tian, Luwen Zhuang, Yongyu Liang, Lingfei Chen, Xuetao Wang, Yanli Li, Xiyong Yu, Teng Gong   +8 more
wiley   +1 more source

About origin of comet 55P [PDF]

Astronomical School’s Report, 2014
55P is a periodic comet with an orbital period of 33 years. It fits the classical definition of a Halley-type comet. The comet is the parent body of the Leonid meteor shower. Orbital simulation of the comet’s 55P/Tempel-Tuttle orbit for 5000 years before its discovery by a variety of integrators is provided in this work.
openaire   +2 more sources

Engineered Bacteria‐Vesicle Delivered Lactate Reprogramming Boosts Tumor Radiosensitivity

Advanced Science, EarlyView.
We engineered a bacterial‐vesicular dual‐delivery platform that targets LOx to colorectal tumors, enabling lactate clearance, immune microenvironment remodeling, and microbiota modulation. This microbe–metabolism synergistic strategy effectively sensitizes colorectal cancer to radiotherapy, offering a promising approach to overcome radioresistance ...
Fei Peng, Zhe Lei, Zhehao Zhang, Zhiyue Su, Chonghai Zhang, Huan Yang, Shu Liu, Mengyuan Hu, Yuhong Wang, Lingchuan Guo, Lin Hu, Kai Yang   +11 more
wiley   +1 more source

Noble Gas Planetology and the Xenon Clouds of Uranus

The Planetary Science Journal
Noble gases provide tracers of cosmic provenance that are accessible to a future Uranus atmospheric probe. Argon and krypton are expected to be well mixed on Uranus with respect to H _2 and He, although condensation at the winter pole may be possible ...
Kevin Zahnle
doaj   +1 more source

Alternative Policy Designs to Help Farmers Select Profitable Conservation Practices

Agribusiness, EarlyView.
ABSTRACT Voluntary private carbon initiatives (VPCIs) promote the implementation of agricultural conservation practices that mitigate emissions of greenhouse gases (GHGs) via financial incentives to participating farmers. Simultaneously, an array of public policies supports the adoption of conservation practices through technical and financial ...
Oranuch Wongpiyabovorn, Alejandro Plastina   +1 more
wiley   +1 more source

Classification of Subgroups of Solar and Heliospheric Observatory (SOHO) Sungrazing Kreutz Comet Group by the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) Clustering Algorithm

Journal of Astronomy and Space Sciences
Sungrazing comets, known for their proximity to the Sun, are traditionally classified into broad groups like Kreutz, Marsden, Kracht, Meyer, and non-group comets.
Ulkar Karimova, Yu Yi
doaj   +1 more source

3D investigation and modeling of the geometric effects on porosity in packed beds

AIChE Journal, EarlyView.
Abstract In porous beds, physical boundaries restrict particle arrangement, leading to inhomogeneous porosity. This paper reports on the porosity profiles that are the result of geometric effects on monodisperse packed beds in cylindrical and cubic arrangements. Special focus is given to the influence of edges and corners in cubic geometries.
Bastian Oldach, Konrad E. R. Boettcher, Alexander S. Sommer‐Behr, Norbert Kockmann   +3 more
wiley   +1 more source

Crater Observing Bioinspired Rolling Articulator (COBRA)

Advanced Intelligent Systems, EarlyView.
Crater Observing Bio‐inspired Rolling Articulator (COBRA) is a modular, snake‐inspired robot that addresses the mobility challenges of extraterrestrial exploration sites such as Shackleton Crater. Incorporating snake‐like gaits and tumbling locomotion, COBRA navigates both uneven surfaces and steep crater walls.
Adarsh Salagame, Henry Noyes, Eric Sihite, Arash Kalantari, Alireza Ramezani   +4 more
wiley   +1 more source

Correlations Between Osteocyte Lacuno‐Canalicular Network and Material Characteristics in Healthy and Mechanically Stimulated Murine Tibiae

Advanced NanoBiomed Research, EarlyView.
This article reveals how calcium content, mineral nanostructure, and lacuno‐canalicular network (LCN) organization interact to shape bone heterogeneity in mouse tibiae. Advanced multimodal imaging uncovers that mechanical loading promotes mature mineral structures even in low‐calcium regions, highlighting LCN‐driven mineralization and offering new ...
Victoria Schemenz, Maximilian Rummler, Alexander van Tol, Isabela Vitienes, Tobias Thiele, Markus A. Hartmann, Manfred Burghammer, Peter Fratzl, Richard Weinkamer, Bettina M. Willie, Wolfgang Wagermaier   +10 more
wiley   +1 more source