how are basic dyes positively charged?
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At the molecular level, basic dyes have amino groups, which are responsible for the molecule's positive charge. Because of their positive charge, basic dyes react with negatively charged compounds. Therefore, the primary way in which the coloration process is achieved with basic dyes is by ionic bonding.
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Methylene blue, which, unlike indigo carmine, is taken up by cells, induces cellular DNA damage in vitro via the generation of singlet oxygen when photoexcited by white light. In contrast, indigo carmine appears to be photostable and to possess little potential to damage genetic material in vitro.
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There are two types of electric charges: positive and negative. An object is negatively charged if it gains excess of electrons, and is otherwise positively charged if loses excess of electrons or uncharged. Hence, A body can be negatively charged by Giving excess of electrons to it.
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Close window. Basic amino acids are polar and positively charged at pH values below their pKa's, and are very hydrophilic.
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Pourdeyhimi says dryer sheets contain positively-charged ingredients that are released by the heat and tumbling motion of the dryer. These ingredients bond loosely to any negatively-charged fabric surfaces—neutralizing the charge and acting as a lubricant.
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The cations, positive ions, flow toward the cathode to replace the cations that are being picked up at the electrode. The anions, negative ions, flow toward the anode to balance the positive charge of the cations that are released from the electrode.
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What is a chromphore? Why are chromophores attracted to bacteria? Bacteria are negatively charged and chromophores are positively charged. What is the most important stain in microbiology?
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At high pH values, the net charge of most proteins is negative, where they bind to the positively-charged matrix in anion exchangers. When the environment is at a pH value equal to the protein's pI, the net charge is zero, and the protein is not bound to any exchanger, and therefore, can be eluted out.
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Explanation: In a galvanic cell, electrons will move in to the anode. Since electrons carry a negative charge, then the anode is negatively charged. ... It's because the protons are attracted to the cathode, so it's mainly positive, and therefore is positively charged.
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Positive and Negative Ions: Cations and Anions. Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. ... And all of them form an anion with a single negative charge.
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In a simple staining technique, a positively charged stain colors the negatively charged cells, making them stand out against the light background. ... In a negative staining technique, a negatively charged stain colors the background, leaving the cells light colored and unstained.
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Metals generally form positively charged cations with a +2 charge. Transition metals can form more than one kind of cation. Halogens form an anion with a single negative charge. Group 16 elements generally form anions with 2 negative charges, while group 15 elements often form -3 charge anions.
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A hydrogen atom is made up of a nucleus with charge +1, and a single electron. Therefore, the only positively charged ion possible has charge +1. It is noted H+.
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I think it means complete charge for actual charge as in ions while a formal charge is just a partial charge for different atoms in the molecule. Because the electrons are shared, there is no actual positive charge due to an unbalanced electron to proton ratio (as in 7 protons in N while only having 5 electrons).
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In a polar covalent bond containing hydrogen (e.g., an O-H bond in a water molecule), the hydrogen will have a slight positive charge because the bond electrons are pulled more strongly toward the other element. Because of this slight positive charge, the hydrogen will be attracted to any neighboring negative charges.
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Formal charge of both is zero, but that does not help us to understand chemistry. Above mentioned reaction shows that nitrogen is more negative, and if you do simple QM computation both Mulliken and NBO gives ~-. 44 for N and ~+. 147 for Cl.
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Cations are positively charged ions. b. Anions are common among nonmetals. ... When a cation forms, more electrons are transferred to it.