• Sonuç bulunamadı

 It is the oxidation reaction of the anomeric

N/A
N/A
Protected

Academic year: 2021

Share " It is the oxidation reaction of the anomeric "

Copied!
12
0
0

Yükleniyor.... (view fulltext now)

Tam metin

(1)

XII.WEEK

(2)

12th WEEK

 Reduction of carbohydrates; picric acid test, qualitative benedict test

 Test observations and results report

(3)

 It is the oxidation reaction of the anomeric

carbon of the monosaccharides containing

free semi acetal hydroxyls to the carboxylic

acid.

(4)

 During this reaction, the sugar acts as a

reducing agent; Ag2 + removes ions such as

Hg2 +, Bi3 +, Cu2 +; such sugars are defined

as reducing sugars.

(5)

 Reductive sugar is a type of sugar that forms

aldehyde or ketone in basic solution. Such

sugars, for example, act as reductants in the

Maillard reaction or the Benedict reaction.

(6)

 Reducing sugars include fructose, glucose,

lactose, arabinose, and maltose.The ketose

monosaccharides, which are ketone groups,

and the aldehydic group are called

aldoses. Sucrose is not a reducing sugar.

(7)

Picric acid experiment

This test is based on the conversion of reducing sugars to colored picric acid.

https://koubiyokimyalab.wordpress.com/tag/pikrik asit/

(8)

Qualitative Benedict ezperiment

 It is understood by the Benedict assay whether the solution known to be a carbohydrate is reductive. With this experiment, the presence of sugar in the urine can be determined and its concentration can be determined semiquantitatively.

 Carbohydrates bearing the free aldehyde or ketone group (carboxyl group) reduce the copper ions from + 2 to + 1 due to the effect of heat in the alkaline environment and discoloration is observed. Because all of the monosaccharides have a free carbonyl group, they give a positive result in this experiment.

https://ameliabiochemistry.wordpress.com/tag/fun/

(9)

 The students will be able to apply the knowledge acquired during the previous week.

 In this context, students will be organized into groups of three before the study.

 Each group will be asked to perform picric acid and

qualitative benedict experiments.

(10)

 All consumables, chemicals, laboratory equipment, especially glassware, and machinery and equipment will be provided as required.

 It will be reminded that each student will

be responsible for the issues given to all

other groups within the application.

(11)

 Students will be asked to report their

observations and results within the scope

of the application to the test report

immediately given to them at the end of

their applications.

(12)

 Students will be asked to remove any material they use, and if necessary, they will be expected to help with cleaning.

 Students will be allowed to leave after

laboratory safety and cleanliness is

ensured.

Referanslar

Benzer Belgeler

 Students will be asked to report their observations and results within the scope of the application to the test report immediately given to them....  Students

The turning range of the indicator to be selected must include the vertical region of the titration curve, not the horizontal region.. Thus, the color change

The other tourism villages and tourism destinations in Northern Cyprus might resist to development plans for a new tourist destination due to possible competition,. Market

Given 6 pictures of different people, and 3 descriptions of 3 of these pictures, the student will be able to identify which description belongs to which picture and be able

b) Make sure that the bottom level of the inlet is at the same level as the bottom of the water feeder canal and at least 10 cm above the maximum level of the water in the pond..

85 The compressive strength test results of all blended cement paste (calcination of clay up to temperature associated to the 30% of total mass loss) .... 86 The compressive

In this sense, characterization, plot, structure, theme, setting, point-of- view, tone and style of the narrative, irony and symbolism are some of the quintessential lexica of

Washington Irving is considered to be the first canonized modern short story writer of USA.. He is particularly famous for “The Legend of the Sleepy Hollow” and “Rip