UHT treatment involves heating milk to 135-150°C for a short time to achieve commercial sterility. This review summarizes the effects of UHT treatment on milk nutrients. Some nutrients like whey proteins and certain vitamins are reduced by UHT processing. Lactose undergoes isomerization to lactulose. Fat and minerals are largely unaffected. Overall, UHT treatment preserves milk for longer shelf life but can reduce some heat-sensitive nutrients.
Condensed milks are the products obtained by evaporating part of the water of whole milk, or fully or partly skimmed milk, with or with without the addition of sugar.
Condensed milks are the products obtained by evaporating part of the water of whole milk, or fully or partly skimmed milk, with or with without the addition of sugar.
detailed information about indian dairy products their manufacturing,chemical analysis,shelf life,composition,process flowchart,production and consumption of indian products, state wise production,indian products and their english counterparts
Channa
Chhena or sana are curds or cheese curds, originating from the Indian subcontinent. Chhana is an acid coagulated product obtained from milk.
Paneer
Paneer is a heat-acid coagulated milk product obtained by coagulating standardized milk with the permitted acids at specified temperature
Chemical Composition
The chemical composition of chhena depends mainly on the initial composition of milk, the conditions of coagulation, the technique of straining( which determines the moisture content), and loses of milk solids in the whey.
detailed information about indian dairy products their manufacturing,chemical analysis,shelf life,composition,process flowchart,production and consumption of indian products, state wise production,indian products and their english counterparts
Channa
Chhena or sana are curds or cheese curds, originating from the Indian subcontinent. Chhana is an acid coagulated product obtained from milk.
Paneer
Paneer is a heat-acid coagulated milk product obtained by coagulating standardized milk with the permitted acids at specified temperature
Chemical Composition
The chemical composition of chhena depends mainly on the initial composition of milk, the conditions of coagulation, the technique of straining( which determines the moisture content), and loses of milk solids in the whey.
carbohydrate and salt and vitamins milkFarhang Hamid
Lectuer 2 carbohydrate and salt and vitamins milk
Lactose is the major carbohydrate fraction in milk. It is made up of two sugars, glucose and galactose (Figure 1).
The average lactose content of milk varies between 4.7 and 4.9%, though milk from individual cows may vary more. Mastitis reduces lactose secretion
Effect of processing and storage on nutrientsPoojaParab12
This presentation describes the effect of processing and storage conditions on nutrients in food namely carbohydrates, proteins, lipids, vitamins and minerals.
Milk
Composition of milk
physical properties of milk
Nutritive value of milk
Milk processing
Packaging of milk
Cream
Physico-chemical properties of cream
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Memorandum Of Association Constitution of Company.pptseri bangash
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A Memorandum of Association (MOA) is a legal document that outlines the fundamental principles and objectives upon which a company operates. It serves as the company's charter or constitution and defines the scope of its activities. Here's a detailed note on the MOA:
Contents of Memorandum of Association:
Name Clause: This clause states the name of the company, which should end with words like "Limited" or "Ltd." for a public limited company and "Private Limited" or "Pvt. Ltd." for a private limited company.
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Registered Office Clause: It specifies the location where the company's registered office is situated. This office is where all official communications and notices are sent.
Objective Clause: This clause delineates the main objectives for which the company is formed. It's important to define these objectives clearly, as the company cannot undertake activities beyond those mentioned in this clause.
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Liability Clause: It outlines the extent of liability of the company's members. In the case of companies limited by shares, the liability of members is limited to the amount unpaid on their shares. For companies limited by guarantee, members' liability is limited to the amount they undertake to contribute if the company is wound up.
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Capital Clause: This clause specifies the authorized capital of the company, i.e., the maximum amount of share capital the company is authorized to issue. It also mentions the division of this capital into shares and their respective nominal value.
Association Clause: It simply states that the subscribers wish to form a company and agree to become members of it, in accordance with the terms of the MOA.
Importance of Memorandum of Association:
Legal Requirement: The MOA is a legal requirement for the formation of a company. It must be filed with the Registrar of Companies during the incorporation process.
Constitutional Document: It serves as the company's constitutional document, defining its scope, powers, and limitations.
Protection of Members: It protects the interests of the company's members by clearly defining the objectives and limiting their liability.
External Communication: It provides clarity to external parties, such as investors, creditors, and regulatory authorities, regarding the company's objectives and powers.
https://seribangash.com/difference-public-and-private-company-law/
Binding Authority: The company and its members are bound by the provisions of the MOA. Any action taken beyond its scope may be considered ultra vires (beyond the powers) of the company and therefore void.
Amendment of MOA:
While the MOA lays down the company's fundamental principles, it is not entirely immutable. It can be amended, but only under specific circumstances and in compliance with legal procedures. Amendments typically require shareholder
Remote sensing and monitoring are changing the mining industry for the better. These are providing innovative solutions to long-standing challenges. Those related to exploration, extraction, and overall environmental management by mining technology companies Odisha. These technologies make use of satellite imaging, aerial photography and sensors to collect data that might be inaccessible or from hazardous locations. With the use of this technology, mining operations are becoming increasingly efficient. Let us gain more insight into the key aspects associated with remote sensing and monitoring when it comes to mining.
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[Note: This is a partial preview. To download this presentation, visit:
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Sustainability has become an increasingly critical topic as the world recognizes the need to protect our planet and its resources for future generations. Sustainability means meeting our current needs without compromising the ability of future generations to meet theirs. It involves long-term planning and consideration of the consequences of our actions. The goal is to create strategies that ensure the long-term viability of People, Planet, and Profit.
Leading companies such as Nike, Toyota, and Siemens are prioritizing sustainable innovation in their business models, setting an example for others to follow. In this Sustainability training presentation, you will learn key concepts, principles, and practices of sustainability applicable across industries. This training aims to create awareness and educate employees, senior executives, consultants, and other key stakeholders, including investors, policymakers, and supply chain partners, on the importance and implementation of sustainability.
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1. Introduction and Key Concepts of Sustainability
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Effect of UHT treatment
1. LITERATURE REVIEW
THE EFFECTS OF UHT HEAT
TREATMENT ON THE MILK NUTRIENTS
By:
A.C. Aslal Saja
Department of Food Science and Technology
Faculty of Applied Science
Sabaragamuwa University of Sri Lanka
2. • Milk is a complete food comprising all the essential
nutrients which is required to nourish the human.
• It contains lactose, protein, fat, vitamin and minerals.
• Milk is sterile at the secretion but it easily can be
spoiled after the milking within 3 to 4 hours if it is
stored in the room temperature.
• Milk processing is required to convert the milk into
several other conditions to preserve it and increase
the shelf life.
3. UHT treatment
• It involves several heating conditions
• Two types
– direct heating system
– indirect heating system
• It is normally in the range of 135-150oC in
combination with holding times necessary to achieve
commercial sterility.
4. Direct heating systems
• The product is heated by direct contact with steam
of potable or culinary quality which could be
obtained from potable water
• The main advantage is that the product is held at the
elevated temperature for a shorter period of time
• There are two methods for direct heating, they are;
– Injection direct heating system
– Infusion direct heating system
7. Indirect heating system
• The heating medium and product are not in direct
contact, but separated by equipment contact
surfaces. Several types of heat exchangers are
applicable. They are;
– Plate heat exchanger
– Tubular heat exchanger
10. UHT treatment procedure
Raw milk
Preheating and heat regeneration
Homogenization (indirect systems only)
Holding at preheat temperature
Holding to sterilization temperature
Holding at sterilization temperature
11. Cooling
Homogenization (direct and indirect systems)
Cooling
Aseptic packaging
Storage of package UHT milk
Fig 5: Flow diagram of UHT processing of milk
14. Effects of nutrients during UHT
treatment
• Numerous changes in the
– chemical composition
– physical and organoleptic characteristics of milk even the
heating conditions are optimized to obtain higher quality
of milk in the industry
• Some, heat induced changes are reversible and
others are not which means the structure and the
nutritional values of nutrients will be damaged.
15. • The reversible heat induced changes occur during
the heat processing are;
– lactose mutarotation
– ionic equilibrium and protein conformation alterations
– casein association
– fat globules agglutination
– fat crystallization
17. Lactose
• Main milk carbohydrate (4.8 to 5.2%).
• It is made of D-glucose and D-galactose linked by 1-4
beta glycosidic bond
• Other carbohydrates in milk include
– Free monosaccharides (glucose, fructose and galactose in
minute quantities)
– Aminosugars (glucosamine and galactosamine)
– Oligosaccharides.
18. • Lactose is converted to lactulsoe by isomerization
through UHT treatment.
• Lactulose isomerization is catalyzed by free amino
group of casein and this isomerization is strictly
depends on time of heating and heating temperature
and pH.
• The lactulsoe formation is little higher in the indirect
heat systems with comparing the direct heating
systems and UHT direct with injection system having
more effect than the UHT direct with infusion
system.
19. • Other carbohydrates especially
– monosaccharides has less heat defect
– No significance changes in the initial galactose content of
milk during direct and indirect UHT treatment.
– The content of monosaccharides, aminosugars are ranged
from 2 to 14 mg/100ml in the just processed UHT milk.
20. Protein
• Milk protein can be classified in to two categories;
they are
– casein protein (major part, approx. 80%)
• α-casein
• β-casein
• γ-casein
• κ-casein
– whey protein (approx. 20%)
• α-lactalbumin,
• β-lactoglobulin
• immunoglobin.
21. • Several physical and chemical changes in whey protein
can occur
• These changes affect the functional and sensory
properties of milk.
• During the heating process, whey protein containing
sulfyhydryl residues undergo following changes,
– A protein complex between beta-lactoglobulin and kappa-
casein, with consequent modification of rennet coagulation
behavior and heat stability
– Typical off flavors
– Unusual amino acids
• The extent of denaturation of β-lactoglobulin in UHT
milk can vary from as low as 35% in direct plants to
close to 100% in indirect plants
22. • Slight increase in the size of the casein micelle due to
its association with denatured whey proteins and
calcium phosphate
• Depends on the time and temperature of processing
and the pH of the milk.
• This lead to a chalky or astringent defect in UHT
• Milk (especially if heated by steam injection), which
can be eliminated by homogenization after the high-
heat treatment
23. • Protein and Nitrogen contents of milk, protein
digestibility were not significantly modified by UHT
heat treatment.
• Biological value and net protein utilization of UHT
milk were lower for stored milk than directly used
milk. Lysine loss during UHT is high but not
significant to affect milk nutritional values.
24. Fat
• Milk fat globule are mostly
– triglycerides (98%);
– the other lipids amount to less than 2% of the
total
• diacylglycerols and monoacylglycerols - 0.5%
• phospholipids
• sterols
• free fatty acids
• fat-soluble vitamin.
25. • Fat protects milk components against tested heat-
induced changes (lactulose formation, decreased
furosine levels, and whey protein denaturation).
• UHT processing causes virtually no physical or
chemical changes in the structure, properties, or
nutritional value of milk fat (Da-wen sun 2006).
26. Vitamins
• Milk contains both water soluble and fat soluble
vitamins.
• The water soluble vitamins are,
– vitamin B
• thiamin (vitamin B1)
• riboflavin (vitamin B2)
• niacin (vitamin B3)
• panthothenic acid (vitamin B5)
• vitamin B6 (pyridoxine)
• vitamin B12 (cobalamin)
• folate.
• Vitamin C
27. • Fat soluble vitamins are;
– Vitamin A (beta-carotene and retinol)
– Vitamin D
– Vitamin E
– Vitamin K
28. – 20 and 30% losses in vitamin B1 (thiamine) and
vitamin B12 can occur during UHT treatment
– The levels of Vitamin C (ascorbic acid) and folic acid
are markedly reduced in UHT milk containing a
significant level of oxygen during UHT processing and
storage.
– UHT affects the folate binding protein (FBP) at a
considerable level which is significantly lower with
compared to raw milk. The concentration of FBP,
which might have an impact on folate absorbtion.
29. • The fat-soluble vitamins (A, D, and E) are largely
unaffected by UHT treatment
• They are heat resistant especially beta-carotene is
unaffected by UHT processing.
• But in case of retinol, it undergoes some changes
30. • In retinol stability sometimes are contradictory,
• depends on whether the analytic method employed
involved separation of the isomers.
• Here some authors report no significance vitamin A
loss from UHT processing, while others using
chromatographic methods that allow separation of
vitamin isomers reports significance losses in vitamin
A.
31. • Vitamin A in the milk is found in the main form of all-
trans retinol and other cis retinol isomers also
present.
• If the heat is applied to the milk the predominant
all-trans isomers cis-isomers
• The isomerization of all-trans retinol into cis-retinol
is occurring during the UHT treatment which has
some sort of loss of vitamin A in the UHT milk.
32. Minerals
• The most common cations (positively charged
ions) in milk are
– potassium (K)
– sodium (Na)
– calcium (Ca)
– magnesium (Mg)
• The most common anions are
– chloride (Cl)
– inorganic phosphate; citrate, sulfate, carbonate, and
bicarbonate (lesser amounts)
33. • K, Na, and Cl are almost entirely diffusible, while Ca,
Mg, inorganic phosphate, and citrate are non
diffusible and associated with the casein micelles.
• Milk salts thus exist in an equilibrium between the
liquid and colloidal phase: this equilibrium can be
affected by processing.
34. • UHT processing transfers minerals from the aqueous
phase to the casein micelle and reduces ionic calcium
levels by 10 to 20%.
• This, in addition to the interaction of whey proteins
with the casein micelle, reduces the susceptibility of
UHT milk to coagulation by rennet.
• Some calcium phosphate is rendered insoluble at the
high temperatures used in UHT heating and deposits
on the surfaces of the heat exchanger (fouling).
35. Other effects
• Protein- sugar interaction
– mainly casein-bound lysine residues and lactose are
interacts and form several chemical compounds which
influence the nutritional quality of milk
– considerable loss of biologically available lysine
• Flavor compound production
– cooked or heated flavor (processing)
• Volatile sulfur compounds produced mainly from denatured
lactoglobulin
– Stale flavor (storage)
• Aliphatic aldehydes
36. Conclusion
• The protein especially whey protein has the higher
loss, lactose and vitamins have some marginal loss,
the fat and the minerals have no damages are
observed.