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2. Pteridine - Wikipedia

   en.wikipedia.org/wiki/Pteridine

   A pteridine is a bicyclic heterocyclic system with two nitrogen atoms at positions 1 and 4 in ring A, and two nitrogen atoms at positions 1 and 3 in ring B. Pteridines constitute a large group of heterocyclic compounds containing a wide variety of substituents on this parent structure.

3. Ethacridine lactate - Wikipedia

   en.wikipedia.org/wiki/Ethacridine_lactate

   Formula: C 18 H 21 N 3 O 4: Molar mass: 343.383 g·mol −1: 3D model ... Up to 150 ml of a 0.1% solution is instilled extra-amniotically using a foley catheter ...

4. Vinpocetine - Wikipedia

   en.wikipedia.org/wiki/Vinpocetine

   Vinpocetine (ethyl apovincaminate) is a synthetic derivative of the vinca alkaloid vincamine, differing by the removal of a hydroxyl group and by being the ethyl rather than the methyl ester of the underlying carboxylic acid.

5. Urinal deodorizer block - Wikipedia

   en.wikipedia.org/wiki/Urinal_deodorizer_block

   Many urinal blocks are now para-dichlorobenzene and naphthalene free; these water-soluble alternative blocks are made from a mixture of fragrances and surfactants (normally quaternary ammonium compounds), [1] which offer some active cleaning and antibacterial efficacy. The new water-soluble blocks improve the cleaning of the pipes which helps ...

6. Calcium lactate - Wikipedia

   en.wikipedia.org/wiki/Calcium_lactate

   Calcium lactate is a white crystalline salt with formula C 6 H 10 CaO 6, consisting of two lactate anions H 3 C (CHOH) CO − 2 for each calcium cation Ca 2+. It forms several hydrates, the most common being the pentahydrate C 6 H 10 CaO 6 ·5 H 2 O. Calcium lactate is used in medicine, mainly to treat calcium deficiencies; and as a food ...

7. Methyl violet - Wikipedia

   en.wikipedia.org/wiki/Methyl_violet

   Methyl violet 2B (IUPAC name: 4,4′-((4-Iminocyclohexa-2,5-dien-1-ylidene)methylene)bis(N,N-dimethylaniline) monohydrochloride) is a green powder which is soluble in water and ethanol but not in xylene. It appears yellow in solution of low pH (approximately 0.15) and changes to violet with pH increasing toward 3.2. [3]

8. Sodium acetate - Wikipedia

   en.wikipedia.org/wiki/Sodium_acetate

   1.6 Heating pad. 2 Preparation. 3 ... 123.3 g/100 mL (20 °C) 125.5 g/100 mL (30 °C) ... a sodium acetate heat pack can be easily reused by immersing the pack in ...

9. Ecological stoichiometry - Wikipedia

   en.wikipedia.org/wiki/Ecological_stoichiometry

   Ecological stoichiometry (more broadly referred to as biological stoichiometry) considers how the balance of energy and elements influences living systems. Similar to chemical stoichiometry , ecological stoichiometry is founded on constraints of mass balance as they apply to organisms and their interactions in ecosystems . [ 1 ]