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  2. Chemical garden - Wikipedia

    en.wikipedia.org/wiki/Chemical_garden

    This experiment in chemistry is usually performed by adding metal salts, such as copper sulfate or cobalt(II) chloride, to an aqueous solution of sodium silicate (otherwise known as waterglass). This results in the growth of plant-like forms in minutes to hours. [1] [2] [3] [4]

  3. Plant nutrition - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrition

    A common symptom of calcium deficiency in leaves is the curling of the leaf towards the veins or center of the leaf. Many times this can also have a blackened appearance. [ 40 ] The tips of the leaves may appear burned and cracking may occur in some calcium deficient crops if they experience a sudden increase in humidity. [ 18 ]

  4. Niobium - Wikipedia

    en.wikipedia.org/wiki/Niobium

    The metal begins to oxidize in air at 200 °C. [61] It resists corrosion by acids, including aqua regia, hydrochloric, sulfuric, nitric and phosphoric acids. [40] Niobium is attacked by hot concentrated sulfuric acid, hydrofluoric acid and hydrofluoric/nitric acid mixtures. It is also attacked by hot, saturated alkali metal hydroxide solutions.

  5. Chlorophyll - Wikipedia

    en.wikipedia.org/wiki/Chlorophyll

    The presence of magnesium in chlorophyll was discovered in 1906, [8] and was the first detection of that element in living tissue. [ 9 ] After initial work done by German chemist Richard Willstätter spanning from 1905 to 1915, the general structure of chlorophyll a was elucidated by Hans Fischer in 1940.

  6. Aqua regia - Wikipedia

    en.wikipedia.org/wiki/Aqua_regia

    As a practical matter, when platinum group metals are purified through dissolution in aqua regia, gold (commonly associated with PGMs) is precipitated by treatment with iron(II) chloride. Platinum in the filtrate, as hexachloroplatinate(IV), is converted to ammonium hexachloroplatinate by the addition of ammonium chloride. This ammonium salt is ...

  7. Ravens suspend WR Diontae Johnson for 1 game after he refused ...

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    The Baltimore Ravens have suspended wide receiver Diontae Johnson for one game due to “conduct detrimental to the team,” the team announced Wednesday afternoon.

  8. Mortgage and refinance rates for Dec. 18, 2024: Average ... - AOL

    www.aol.com/finance/mortgage-and-refinance-rates...

    Average mortgage rates edge higher for 30-year and 15-year terms as of Wednesday, December 18, 2024, as the Federal Reserve is set to conclude its final policy session of the year.

  9. Government shutdown odds are rising. Economic experts aren’t ...

    www.aol.com/finance/government-shutdown-odds...

    Other stoppages have been much shorter, with economic analyses after the fact often showing that the lost money is then returned to the US economy in nearly equal measure after the government reopens.

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