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This 3 sentence summary provides the high level information from the document: The document discusses the topic of discovery, physicochemical and biological characteristics of viruses. It was presented by Hitesh Choudhary with a roll number of AE-014. The presenter shares details about the discovery and properties of viruses.
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Water exists in soils in three main states: solid, liquid, and gas. Liquid water fills the pores between soil particles and is available for plant uptake. Water vapor exists in the air spaces, while ice can form in colder conditions. These different forms impact key soil processes. Liquid water transports nutrients and is taken up by plant roots. It also maintains turgor pressure. Solid water aids soil structure and stability. Water vapor allows for gas exchange and transpiration. Understanding soil water dynamics is important for sustainable water management and adapting to climate change.
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The document provides an overview of Ayurvedic nutrition principles compared to conventional nutrition. Some key differences include Ayurveda's focus on how the body processes food based on an individual's constitution rather than caloric counts. The document discusses the six tastes (sweet, sour, salty, pungent, bitter, astringent) and their effects on doshas and tissues. It provides guidelines for eating including choosing seasonal whole foods, eating at regular times in a calm environment, and the importance of drinking water in moderation with meals. Overall, the document presents Ayurveda's personalized approach to diet and digestion based on an individual's unique prakriti.
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The debris of the ‘last major merger’ is dynamically young
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
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