Upload File

mandatory experiments on food

46
Mandatory experiments on Food

Upload: trevor-dean

Post on 18-Jan-2018

217 views

Category:

Documents


0 download

Report

DESCRIPTION

Test for reducing sugar

TRANSCRIPT

Page 1: Mandatory experiments on Food

Mandatory experiments on Food

Page 2: Mandatory experiments on Food

Test for reducing sugar

Page 3: Mandatory experiments on Food
Page 4: Mandatory experiments on Food
Page 5: Mandatory experiments on Food

Test for fats

Page 6: Mandatory experiments on Food
Page 7: Mandatory experiments on Food
Page 8: Mandatory experiments on Food
Page 9: Mandatory experiments on Food

Test for protein

Page 10: Mandatory experiments on Food
Page 11: Mandatory experiments on Food
Page 12: Mandatory experiments on Food

Test for starch

Page 13: Mandatory experiments on Food
Page 14: Mandatory experiments on Food
Page 15: Mandatory experiments on Food
Page 16: Mandatory experiments on Food

16

Food Tests – Summary Chart

Test for Materials Method Positive ResultsStarch Iodine Solution Add iodine to the food sample A blue/black colourReducing sugar (Glucose)

Benedict's Solution Add to sample and warm gently A brick red colour

Protein Copper sulphate (CuSO4) and sodium hydroxide (NaOH)Biuret solution

Add some NaOH to the moist food. Then gently pour CuSO4 solution down the side of the tube

A violet colour

Fat Brown Paper Rub the food onto the paper, warm gently to dry and hold the paper up to the light

A translucent spot

Vitamin C DCPIP Add to moist food or fruit juice A change from blue to pink or colourless

Page 17: Mandatory experiments on Food

Experiment Questions

Food Tests

Page 18: Mandatory experiments on Food

Food Tests

For what is the Biuret test (copper sulphate and sodium hydroxide solutions) used in the

biology laboratory?

Test for protein

Page 19: Mandatory experiments on Food

Food Tests

For what is the Benedict’s (or Fehling’s) test used in the biology laboratory?

Test for reducing sugar

Page 20: Mandatory experiments on Food

Food TestsFor what purpose did you use brown paper or

Sudan III in food testing?

To test for Fat / Lipid / Oil

Page 21: Mandatory experiments on Food

Food Tests

What reagent or chemicals did you use to test for protein?

Biuret OR NaOH and CuSO4

Page 22: Mandatory experiments on Food

Food Tests

Is heat necessary in the test that you carried out to test for protein?

No

Page 23: Mandatory experiments on Food

Food Tests

What colour change indicates the presence of protein?

From blue to purple / violet

Page 24: Mandatory experiments on Food

Food Tests

Name the test or name the chemical used to test a solution for the presence of glucose

(reducing sugar).

Clinistix / Benedicts / Fehling’s / Copper

sulphate

Page 25: Mandatory experiments on Food

Food Tests

What colour change indicates a positive result for the presence of glucose?

(Clinistix) Orange to Blue or (others) Blue to Red

Page 26: Mandatory experiments on Food

Food Tests

Is heat necessary to test a solution for the presence of reducing sugar?

Yes

Page 27: Mandatory experiments on Food

Food Tests

For which purpose did you use Biuret solution or alkaline copper sulphate in food testing?

To test for (soluble) protein

Page 28: Mandatory experiments on Food

Food Tests

State a use for the Biuret test in the biology laboratory.

To detect presence of protein

Page 29: Mandatory experiments on Food

Food Tests

What is the initial colour of the reagent or chemicals used to test for protein?

Blue

Page 30: Mandatory experiments on Food

Food Tests

Was there a colour change in the control experiment when testing for protein?

No

Page 31: Mandatory experiments on Food

Food Tests

Name the test or give the chemicals used to test a sports drink for the presence of protein.

Biuret Test / Sodium Hydroxide & Copper sulphate

Page 32: Mandatory experiments on Food

Food Tests

If protein is present in a drink, what colour change would you expect to see? In your

answer give the initial and final colour of the test solution.

Blue to violet /purple / lilac

Page 33: Mandatory experiments on Food

Food Tests

Is heat necessary for the test for protein?

No

Page 34: Mandatory experiments on Food

Food Tests

For what purpose did you use Fehling’s solution or Benedict’s solution in the course of your

practical activities?

To check for Glucose / reducing sugar

Page 35: Mandatory experiments on Food

Food Tests

For which purpose did you use Brown paper or Sudan III in food testing?

To test for fat (or lipid or oil)

Page 36: Mandatory experiments on Food

Food Tests—Reducing sugar

(i) Name the reagent(s) used.(ii) State the initial colour of the reagent.

(i) Benedict’s/ Fehlings I and II, (ii) Blue

Page 37: Mandatory experiments on Food

Food Tests—Reducing sugar

State whether the test requires heat.

Yes

Page 38: Mandatory experiments on Food

Food Tests—Reducing sugar

What colour indicates a positive result?

Brick-red/orange

Page 39: Mandatory experiments on Food

Food Tests—Protein

(i) Name the reagent(s) used.(ii) State the initial colour of the reagent.

(i) Biuret solution / CuSO4 + NaOH (ii) Blue/ light blue

Page 40: Mandatory experiments on Food

Food Tests—Protein

State whether the test requires heat.

No

Page 41: Mandatory experiments on Food

Food Tests—Protein

What colour indicates a positive result?

Purple / violet

Page 42: Mandatory experiments on Food

Food Tests

(i) Name a test to show the presence of a reducing sugar (e.g. glucose).

(ii) Describe how you would carry out this test.

(i) Benedict’s/ Fehling’s (ii) Dissolve sample in water or put in test

tube / add reagent / heat / don’t boil / observe change or state result (brick-red-

orange precipitate)

Page 43: Mandatory experiments on Food

Food Tests

(i) Name a test for protein.(ii) Describe how you would carry out this test.

(i) Biuret test or named chemicals (ii) Add biuret reagent (or sodium hydroxide

and copper sulfate) / to sample / heat or shake / observe or record colour change

(purple-violet)

Page 44: Mandatory experiments on Food

Questions pg 13/14

Page 45: Mandatory experiments on Food
Page 46: Mandatory experiments on Food

Food as a Contextual Cue in Counterconditionin Experiments - Is There a Counterconditioning Process

Experiments in Food Science - Activity 6 - Teacher Guide/media/Knowledge Center/Learn Food... · IF T Experiments in Food Science Series Experiments in Food Science Activity #6 Effect

Assessing Impact of Mandatory CSR on Food Industry · PDF file · 2015-08-03Assessing Impact of Mandatory CSR on Food Industry ... fell when people got to know of the financial crisis

SQF Food Safety Audit Edition 8 - Beston Global Food Company...2.4.3Food Safety Plan (Mandatory) The HACCP plan covers food safety & quality and regulatory requirements are appropriate

MANDATORY MANDATORY MANDATORY

Mandatory Student Experiments Quick-Pick Order …lennoxeducational.ie/files/7114/2564/3790/LC_Physics_2015_270215.pdfExperiment Image Product ... principle of conservation of Momentum

Food Chemistry Experiments - Educypediaeducypedia.karadimov.info/library/IFTFoodExperiments.pdf · Food Chemistry Experiments Institute ... project of the Career Guidance Committee

Nutrition Labels IT’S YOUR HEALTH · A food label contains this information: • a Nutrition Facts table (mandatory) • an ingredient list (mandatory) • nutrition claims (optional)

Soil Experiments for Children (EN) - Food and Agriculture ... Experiments for Children (EN) - Food and Agriculture

Research Paper: Experiments in globalisation, food security and land use decision making

Policies for tackling obesity and creating healthier food … · 2017-03-03 · food, mandatory restrictions on unhealthy foods in other government settings 1 Food retail: expand

Thomas Vogel- Director of Food Safety · Thomas Vogel- Director of Food Safety . Challenges)for) the)Food) ... missing from ISO 22000, ... • Mandatory review results in more stringent

Mandatory kilojoule labelling in fast food · 2015-06-08 · ©2014 National Heart Foundation of Australia Mandatory kilojoule labelling in fast food outlets in Australia What implementation

Popeyes Food Safety Certification Program Mandatory training for ALL food service employees Presen t

Without lids! Mandatory food scrap diversion Without lids! · Glass food & beverage containers. Without lids! Plastic food & beverage containers. Without lids! Clean, plastic lids

The Impact of Mandatory Menu Labeling On One Fast Food Chain in

Food Chemistry: Experiments for Labs and Kitchens

Workshops on Framework Agreements for products · Framework Agreements Mandatory for Central PA Mandatory for Local PA ... DPS on antiseptic and disinfectant products 4. DPS on food

Mandatory vs. Voluntary Approaches To Food Safety … · Mandatory vs. Voluntary Approaches To Food ... The key distinguishing characteristic between the cases is the ... a firm 13

Mr. Cummins The Physics Mr. C - JCS Junior · PDF fileMr. Cummins The Physics 1 Junior Cert Mandatory Experiments Biology: pages 2 - 4 OB3 Qualitative food tests for starch, reducing

“BERRYMEAT” CONSUMER EXPERIMENTS › fileadmin › Business...“berrymeat” consumer experiments-a case of novel food products’ consumer acceptance analysed throughout the

UK NI United Kingdom Northern Ireland FactSheet · 2016. 6. 3. · UK-NORTHERN IRELAND School food policy (mandatory) “Healthy Food for Healthy Outcomes - Food in Schools Policy”

EXPERIMENTS ON THE DIGESTION OF FOOD BY BIRDS · Digestion of Food by Birds 155 EXPERIMENTS ON THE DIGESTION OF FOOD BY BIRDS* BY JAMES STEVENSON Food is a factor of considerable

Food Safety · labelling became mandatory . 2011 - Food Expert Advisory Committee (FEAC) ... Howard E. Baumann – Pillsbury - HACCP 1963 - Codex Alimentarius Commission – FAO Food

Navigating Food Labels. Food Label Regulations NLEA, 1990; mandatory labeling, 1994 Regulated by: ▫Food and Drug Administration ▫Food Safety and Inspection

Food Allergies - Amazon S3Group+Meeting+Power… · •Food additives •Again –food label reading is mandatory •Pesticides •Organic Vs. Non Organic choices •Imported foods

Mandatory Food Handler training - Region of Peel - Working for

Food Chemistry Experiments

P1017-ListeriaMicro-2CFS - Food Standards Australia Web view · 2016-10-15that recommended certain food business sectors should develop and implement mandatory food safety programs

of Mandatory Food Safety Programs - lga.sa.gov.au Guidelines... · National Library of Australia Cataloguing-in-Publication entry Title: Guidelines for auditors of mandatory food

food and Biology experiments benedict's solution - Trionó · PDF fileBiology experiments Mandatory experiment: to examine plant ... food which you want to test into a test tube. 2

Experiments in Food Science - Activity 4 - Teacher …/media/Knowledge Center/Learn Food Science/Experiments...undergo chemical deterioration and form bitter ... this part of the experiment

(Final) Accreditation of Food Safety Certification · PDF fileAccreditation of Food Safety Certification Bodies ... • This is a mandatory critera for food ... (ISO 22000 Certified)

Mandatory vs. Voluntary Approaches To Food Safety by Kathleen

UK E United Kingdom England FactSheet · UK-ENGLAND School food policy (mandatory) “The Requirements for School Food Regulations 2014, No. 1603” “School Food Standards - A practical