What does chromophore mean?
What does chromophore mean?
Chromophore is an unsaturated group that absorbs light and reflects it at specific angle to give the hue, e.g., azo, keto, nitro, nitroso, thio, ethylene etc; From: Fundamentals and Practices in Colouration of Textiles, 2014.
How do you identify chromophores?
(a) CHROMOPHORE: The term chromophore was previously used to denote a functional group of some other structural feature of which gives a color to compound. For example- Nitro group is a chromophore because its presence in a compound gives yellow color to the compound.
What is the difference between chromophore and Auxochrome?
Chromophore is that part of the molecule which when exposed to visible light will absorb and reflect a certain color. Auxochrome is a group of atoms which is functional and has the capability to alter the capacity of the chromophore to reflect colors. Auxochrome increases the color of any organic substance.
What is chromophore and Auxochrome with example?
Exemplify and explain how auxochrome shifts. Ans. 1. (a) CHROMOPHORE: The term chromophore was previously used to denote a functional group of some other structural feature of which gives a color to compound. For example- Nitro group is a chromophore because its presence in a compound gives yellow color to the compound …
What is Auxochrome example?
An auxochrome is a functional group of atoms with one or more line pairs of electrons when attached to a chromophore, alters both the wavelengths and intensity of absorption. Examples:- Hydroxyl group (-OH), Amino group (-NH2), Aldehyde group (-CH2) and the methyl marcaptan group (-SCH3).
What is chromophore example?
Common examples include retinal (used in the eye to detect light), various food colorings, fabric dyes (azo compounds), pH indicators, lycopene, β-carotene, and anthocyanins. The tetrapyrrole moiety in organic compounds which is not macrocyclic but still has a conjugated pi-bond system still acts as a chromophore.
Which is not a chromophore?
A compound containing only a chromophore may be coloured material but not a dye. For example azo benzene is red coloured but not a dye. Where as para amino azobenzene (aniline yellow) is a dye. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.
Which one is not the example of Auxochrome?
>C=N is not an auxochrome.
Which group will increase intensity of Colour?
The intensity of colour can be increased in a dye molecule by addition of substituents containing lone pairs of electrons to the aryl ring such as: These groups are known as auxochromes. Sometimes the entire structure of the colorant is called the chromogen.
What is meant by Bathochromic shift?
Bathochromic shift (from Greek βαθύς bathys, “deep”; and χρῶμα chrōma, “color”; hence less common alternate spelling “bathychromic”) is a change of spectral band position in the absorption, reflectance, transmittance, or emission spectrum of a molecule to a longer wavelength (lower frequency).
What happens during Bathochromic shift?
BATHOCHROMIC SHIFT. The shift of absorption to a longer wavelength due to substitution or solvent effect (a red shift). The shift of absorption to a shorter wavelength due to substitution or solvent effect (a blue shift).
What causes Hypsochromic shift?
This can occur because of a change in environmental conditions: for example, a change in solvent polarity will result in solvatochromism. A series of structurally related molecules in a substitution series can also show a hypsochromic shift.
What is Hypochromic shift in UV spectroscopy?
Hypochromic shift :– In this Type of shift decrease intensity of radiation because of decreased absorption. It is due to presence of certain group which may cause deformation of structure of compound
What is Hypochromic effect?
The Hypochromic Effect describes the decrease in the absorbance of ultraviolet light in a double stranded DNA compared to its single stranded counterpart. It also absorbs more ultraviolet light since the bases no longer forms hydrogens bonds and therefore are free to absorb light.
What is spectral shifting?
(Astronomy) a shift in the lines of the spectrum of an astronomical object towards a longer wavelength (the red end of an optical spectrum), relative to the wavelength of these lines in the terrestrial spectrum, usually as a result of the Doppler effect caused by the recession of the object.
What is Hyperchromic?
Medical Definition of hyperchromic 1 : of, relating to, or characterized by hyperchromia. 2 : of, relating to, or characterized by increased absorption especially of ultraviolet light hyperchromic effect in DNA molecules subjected to heat.
What is DNA Hyperchromic shift?
The phenomenon of UV absorbance increasing as DNA is denatured is known as the hyperchromic shift. The purine and pyrimidine bases in DNA strongly absorb ultraviolet light. Double-stranded DNA absorbs less strongly than denatured DNA due to the stacking interactions between the bases.
Why does heat denature or melt DNA in solution?
Heat denaturation of DNA, also called melting, causes the double helix structure to unwind to form single stranded DNA. When DNA in solution is heated above its melting temperature (usually more than 80 °C), the double-stranded DNA unwinds to form single-stranded DNA.
Is pernicious anemia Normochromic and Hypochromic?
It is normochromic type of anaemia as the Hb synthesis is not effected. If Megaloblastic anaemia was due to nutritional deficiency, hypochromia due to co-existing iron deficiency is commonly seen. Whereas, in pernicious anaemia due to isolated B12 deficiency, the PB smear shows normochromic macrocytes
Does high MCV mean anemia?
MCV is the most useful indicator to diagnose anemia. MCV values seem to be higher than average in people taking zidovudine or in people with vitamin B12 and folic acid deficiencies
How do you increase your hemoglobin count?
How to increase hemoglobin
- meat and fish.
- soy products, including tofu and edamame.
- eggs.
- dried fruits, such as dates and figs.
- broccoli.
- green leafy vegetables, such as kale and spinach.
- green beans.
- nuts and seeds.
What is normal percentage Hypochromic cells?
Nine patients had serum ferritin values < 100 micrograms/1; nonetheless in these patients the median percentage of hypochromic RBC was 5.9% (range 0.9-14.3%), indicating that an absolute iron deficiency can occur in the presence of normal amounts of hypochromic RBC.
What are the symptoms of Hypochromic anemia?
Hypochromic anemia was historically known as chlorosis or green sickness for the distinct skin tinge sometimes present in patients, in addition to more general symptoms such as a lack of energy, shortness of breath, dyspepsia, headaches, a capricious or scanty appetite and amenorrhea.
How is Hypochromia treated?
Microcytic anemia treatment Treatment for microcytic anemia focuses on treating the underlying cause of the condition. Your doctor may recommend that you take iron and vitamin C supplements. The iron will help treat the anemia while the vitamin C will help increase your body’s ability to absorb the iron.
What is Microcytic Hypochromic?
Microcytic anemia is defined as the presence of small, often hypochromic, red blood cells in a peripheral blood smear and is usually characterized by a low MCV (less than 83 micron 3). Iron deficiency is the most common cause of microcytic anemia.
What is the cause of Microcytic Hypochromic anemia?
Iron deficiency hypochromic microcytic anemia is caused due to disruption of iron supply in diet due to decreased iron content in the diet, pathology the small intestines like sprue and chronic diarrhea, gastrectomy, and deficiency of vitamin C in the diet.