If you have been reading about degree of hydrolysis and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2025-11-06. Where a claim depends on a specific study, the study is described rather than over-claimed.
Hydrolysates usually contain 70% to 90% protein on a dry basis, with variable ash, fat, and carbohydrate. Solubility in water is generally high over a broad pH range, though bitter notes can appear from exposed hydrophobic peptides. The powder tends to absorb moisture and may brown during prolonged warm storage. Applications span sports nutrition, clinical nutrition, infant formulas, and flavor systems. Regulatory status and labeling rules differ by country. A key open question is whether a given peptide profile reliably predicts functional or sensory behavior across different food matrices.
Whey protein hydrolysate is a dairy ingredient made by breaking peptide bonds in whey proteins. Enzymes such as proteases, or in some processes acid or heat, cleave the protein chains into shorter peptides and free amino acids. The starting material may be sweet whey, acid whey, whey protein concentrate, or whey protein isolate. Because raw materials and reaction conditions differ, the final mixture is not a single uniform substance. Its peptide profile, mineral content, and residual lactose depend on the source and the processing steps used.
Production typically begins with pasteurization and concentration of whey. A protease is added under controlled temperature and pH, and the reaction is stopped by heat or pH change when the target extent of cleavage is reached. Ultrafiltration or diafiltration may remove enzymes, salts, and small molecules. The liquid is then spray dried into a powder. Process parameters shape bitterness, solubility, and peptide size. Established control points include enzyme type, reaction time, and inactivation conditions. How these variables interact across large-scale batches remains an area of active process development.
Whey protein hydrolysate appears in infant formula, sports nutrition, and clinical nutrition. In infant formula, extensively hydrolyzed products are used when a reduced allergenicity is desired, though not all hydrolysates are hypoallergenic. In sports products, the ingredient is marketed for rapid amino acid delivery, but the practical advantage over intact whey protein remains debated. Research often compares hydrolysate with isolate or concentrate for absorption kinetics, muscle protein synthesis, and gastrointestinal tolerance. Regulatory categories differ by country, and label terms such as partially hydrolyzed or extensively hydrolyzed are defined in some jurisdictions but not others.
Whey protein hydrolysate is a dairy ingredient made by treating whey protein with proteolytic enzymes. The starting material is whey, the liquid remaining after cheese or casein production, and its main proteins include beta-lactoglobulin, alpha-lactalbumin, and bovine serum albumin. Enzyme action breaks peptide bonds, producing shorter peptides and some free amino acids. The result is not a single uniform substance; composition depends on whey source, enzyme type, hydrolysis conditions, and downstream filtration. Hydrolysates are often described by average peptide length or degree of hydrolysis rather than by one fixed molecular weight.
| Property | Value | Notes |
|---|---|---|
| Appearance | Off-white to pale yellow powder | Color varies with whey source and drying. |
| Protein content | 75–90% of dry matter | Depends on raw material and filtration. |
| Hydrolysis extent | 5–35% cleaved bonds | Ranges overlap product types; assay-dependent. |
| Water solubility | High across pH 3–7 | Hydrolysis raises solubility versus intact protein. |
| Typical storage | 15–25 °C, dry | Keep sealed; limit moisture and heat. |
Commercial production usually begins with whey protein concentrate or isolate, not raw whey, to reduce fat and lactose. Food-grade proteases from bacterial or plant sources are added under controlled temperature and pH, then inactivated by heat or pH adjustment. The resulting liquid may be clarified, filtered, concentrated, and spray-dried into powder. Enzyme choice, reaction time, and pretreatment conditions create products with different peptide size distributions. Because these variables are proprietary and not standardized, two hydrolysates with the same degree of hydrolysis can differ in peptide sequences and mineral content.
Composition reflects both the original whey and the hydrolysis process. Products contain protein-derived peptides, variable ash, moisture, and residual lactose or fat depending on filtration. Some free amino acids increase during hydrolysis, and bitterness often rises with higher degrees of hydrolysis due to exposed hydrophobic residues. Mineral profiles vary with the whey source and any neutralization step. Allergenicity may be reduced in extensively hydrolyzed products, but the extent depends on residual intact protein and peptide size, and this remains a subject of ongoing study.
Whey protein hydrolysate is a dairy-derived ingredient made by treating whey protein with enzymes or acid to break peptide bonds. The starting material is typically sweet whey or acid whey from cheese manufacture, which contains beta-lactoglobulin, alpha-lactalbumin, bovine serum albumin, and immunoglobulins. Hydrolysis shortens protein chains into peptides and free amino acids, changing solubility, viscosity, and taste. The extent of breakdown is described by degree of hydrolysis, a percentage of cleaved peptide bonds. This value influences functional and sensory properties but does not by itself define a specific molecular profile.
Composition tables often report protein content on a dry basis, ash, moisture, fat, and lactose. Because hydrolysis adds water to peptide bonds, the total mass yield can appear slightly higher than the original protein if residual salts and water are counted. Some products are further processed by ultrafiltration, spray drying, or decolorization, which alters mineral content and flavor. Product labels may distinguish partially hydrolyzed from extensively hydrolyzed whey, but these terms are not always defined by a single numerical threshold across regions.
Whey protein hydrolysate is a dairy ingredient made by treating whey protein with proteases that cleave peptide bonds. The starting material is typically whey protein concentrate or isolate, which contains beta-lactoglobulin, alpha-lactalbumin, and smaller amounts of bovine serum albumin and immunoglobulins. Hydrolysis shortens protein chains into peptides and free amino acids, changing solubility, viscosity, and flavor compared with intact whey protein. The extent of cleavage is commonly described by degree of hydrolysis, a percentage of broken peptide bonds relative to total bonds.
== Signs and symptoms == Rheumatoid arthritis (RA) is a chronic autoimmune disorder that can affect multiple organ systems. It mainly affects fluid filled connections between joints (synovial joints), causing inflammation, pain, and stiffness in the joints. RA also affects other organs in 20–40% of people. RA typically develops slowly and affects both sides of the body. Systemic symptoms such as fatigue, low-grade fevers and weight loss are also seen in RA.
An association between osteoporosis, another disease characterized by the degradation of bony tissue, and sarcopenia, the age-related degeneration of muscle mass and quality have also been found. Whether this link is a result of direct regulation or a secondary effect through muscle mass is not known. A link in mice between the concentration of myostatin in the prenatal environment and the strength of offspring's bones, partially counteracting the effects of osteogenesis imperfecta (brittle bone disease) has been found. Osteogenesis imperfecta is due to a mutation that causes the production of abnormal Type I collagen. Mice with defective myostatin were created by replacing sequences coding for the C-terminal region of myostatin with a neomycin cassette, rendering the protein nonfunctional. By crossbreeding mice with the abnormal Type I collagen and those with the knockout myostatin, the offspring had "a 15% increase in torsional ultimate strength, a 29% increase in tensile strength, and a 24% increase in energy to failure" of their femurs as compared to the other mice with osteogenesis imperfecta, showing the positive effects of decreased myostatin on bone strength and formation.
=== Prevention and patient education === Early recognition and knowledge of the onset of UCTD can help patients manage and control their disease. Patients should be informed of common agents and triggers to help manage symptoms, to shorten the duration of the disease, and prevent complications.
=== Cannabinoids in other plants === Phytocannabinoids occur in plants like Echinacea purpurea, Echinacea angustifolia, Acmella oleracea, Helichrysum umbraculigerum, and Radula marginata. Echinacea species contain Anandamide-like alkylamides, with at least 25 identified, some showing affinity for CB2 receptors. These are concentrated in roots and flowers. Yangonin in kava has significant CB1 receptor affinity. Tea (Camellia sinensis) catechins show affinity for human cannabinoid receptors. Beta-caryophyllene, a terpene in cannabis and other plants, is a selective CB2 receptor agonist. Black truffles contain anandamide. Perrottetinene, a moderately psychoactive cannabinoid, is found in Radula varieties. Machaeriol A and related compounds occur in Machaerium plants. Most phytocannabinoids are nearly insoluble in water but soluble in lipids, alcohols, and other non-polar organic solvents.
Her goals in this article and its successors were to propose a well-defined testable model, to work out the consequences of its assumptions and to make predictions that could be tested experimentally. In these goals, she succeeded; however, within a few years, experiments and further modeling showed that the cyclol hypothesis was untenable as a model for globular proteins.
Sources: en.wikipedia.org
PL-480 revenues in the first twenty years were sometimes huge and although PL-480 has become smaller it continues to provide resources to USAID for nutrition and disaster relief programs. Several factors arose that favored large-scale economic assistance to developing countries, especially in Asia. South Korea needed massive economic assistance after an armistice was finally signed in July 1953, and U.S. economic assistance to South Vietnam increased after the retreat of France in 1954. On a global scale, the Cold War after the death of Joseph Stalin in March 1953 evolved in the direction of rivalry over influence in low-income countries who were seeking financing for their development initiatives. India was a particular case of a country where the U.S. felt it needed to provide economic assistance to balance the USSR's influence, even though India was not a U.S. military ally. These considerations led to advocacy of expanded economic assistance by several voices within the Eisenhower administration: the FOA Director, former Minnesota governor Harold Stassen; national security advisor Charles Douglas Jackson (who drew on advice from MIT economists Max Millikan and Walt Rostow); and leading officials in the State Department and the National Security Council. In June 1954, Congress raised the ExIm Bank's lending authority from $4.5 billion to $5 billion. Eisenhower also created in December 1954 a Cabinet-level Council on Foreign Economic Policy, which in March 1955 recommended expanded soft loans for development.
The dye molecules bind to proteins, including those in wool (keratin), to form a protein–dye complex. The formation of the complex stabilises the negatively charged anionic form of the dye, producing the blue colour, even under acid conditions when most of the molecules in solution are in the cationic form. This is the basis of the Bradford assay, which quantifies protein by Coomassie brilliant blue dye binding. The binding of the dye to a protein causes a shift in the absorbance maximum of the dye from 465 to 595 nm. The increase of absorption at 595 nm is monitored to determine protein concentration. The dye also forms a complex with the anionic detergent sodium dodecylsulfate (SDS). The formation of this complex stabilizes the neutral, green form of the dye. This effect can interfere with the estimation of protein concentration using the Bradford assay. It is also likely that the anionic detergent competes with the dye for binding to the protein.
Polymer–polymer systems. In a Polymer–polymer system, both phases are generated by a dissolved polymer. The heavy phase will generally be a polysaccharide, and the light phase is generally Polyethylene glycol (PEG). Traditionally, the polysaccharide used is dextran. However, dextran is relatively expensive, and research has been exploring using less expensive polysaccharides to generate the heavy phase. If the target compound being separated is a protein or enzyme, it is possible to incorporate a ligand to the target into one of the polymer phases. This improves the target's affinity to that phase, and improves its ability to partition from one phase into the other. This, as well as the absence of solvents or other denaturing agents, makes polymer–polymer extractions an attractive option for purifying proteins. The two phases of a polymer–polymer system often have very similar densities, and very low surface tension between them. Because of this, demixing a polymer–polymer system is often much more difficult than demixing a solvent extraction. Methods to improve the demixing include centrifugation, and application of an electric field. Polymer–salt systems. Aqueous two-phase systems can also be generated by generating the heavy phase with a concentrated salt solution. The polymer phase used is generally still PEG. Generally, a kosmotropic salt, such as Na3PO4 is used, however PEG–NaCl systems have been documented when the salt concentration is high enough. Since polymer–salt systems demix readily they are easier to use.
Narrated by Tim Pigott-Smith, produced by Patrick Uden, directed by Sheila Hayman, made by Uden Associates 28 August A Short History of the Future: Spaceship, how space ships were viewed at cinema, and that the US space programme was largely started by Wernher von Braun, when making documentary programmes at Walt Disney; the American public needed to be convinced of the possibilities of space travel - as it would be publicly funded; Jesco Von Puttkamer of NASA; technology historical writer Frederick I. Ordway III; von Braun had first attempted a rocket launch in 1937, but it exploded; on 3 October 1942, his first successful rocket was the first man-made supersonic craft; there were 3,165 V-2 successful launches during the war; much 1950s popular space diagrams were drawn by Chesley Bonestell, which drew the attention of Walt Disney and producer Ward Kimball, who subsequently made the 1955 television episodes Man in Space and Man and the Moon, featuring Wernher von Braun, where von Braun demonstrated his XR-1 craft; health effects of space were demonstrated by former Luftwaffe fighter pilot and physicist Heinz Haber, later a well-known German television presenter; Star Trek: The Original Series was not popular when first shown, but was hugely popular after 1972 when it was repeated; consequently, the first space shuttle was named Enterprise, and when the shuttle was displayed in California on 17 September 1976, it was attended by the full cast of Star Trek, with the theme music also being played; Beverly Thurmond, NASA food scientist; Laura Louviere of NASA.
Sources: en.wikipedia.org
Conduction disorder (e.g. widening of QRS complex, prolonged QT interval, PR/PQ interval changes, bundle-branch block, torsade de pointes, particularly in patients with hypokalaemia) Individual side-effects may or may not be amendable to treatment. As noted below, bethanechol may alleviate anti-muscarinic/anti-cholinergic side-effects. It may also treat sexual side-effects common to the likes of clomipramine, SSRIs and phenelzine. Topiramate has been used to off-set the weight-gain induced from various antidepressants and antipsychotics, and more broadly for general weight-loss (likewise with bupropion). This option may be especially attractive in patients either overweight prior to clomipramine treatment or who have gained an undesirable amount of weight on it. Another potential advantage of topiramate in the adjunctive treatment of people taking clomipramine is engendered in its status as an anti-convulsant medication, thereby theoretically increasing the seizure-threshold in patients (which clomipramine decreases to an extent which precludes its dosage ranging above 250 mg/d. in normal circumstances, likewise with maprotiline and its 225 mg/d. upper-ceiling).
Pholcodine is an opioid cough suppressant (antitussive). It helps suppress unproductive coughs and also has a mild sedative effect, but has little or no analgesic effects. It is also known as morpholinylethylmorphine and homocodeine. Pholcodine is found in certain cough lozenges, and more commonly as an oral solution, typically 5 mg / 5 ml. Adult dosage is 5-10 ml up to 3-4 times daily. Pholcodine now largely replaces the previously more common codeine linctus, as it has a much lower potential for dependence. Pholcodine has been widely used as an antitussive agent but by 2023 concerns over its association with anaphylaxis in some circumstances meant that it has been withdrawn from sale in many territories. Pholcodine is not prescribed in the United States where it is classed as a Schedule I drug, the most highly controlled drug category. Following the conclusion of a review of post-marketing safety data by the Medicines and Healthcare products Regulatory Agency, all pholcodine-containing medicines were recalled and withdrawn from the UK as a precaution. The available data has demonstrated that pholcodine use, particularly in the twelve months before general anesthesia with NMBAs (neuromuscular blocking agents), is a risk factor for developing an anaphylactic reaction to NMBAs. In December 2022, the European Medicines Agency recommended their withdrawal in the EU. As of February 2023, the Australian Therapeutic Goods Administration canceled the registration of pholcodine.
Synovial cavity: all diarthroses have the characteristic space between the bones that is filled with synovial fluid. Joint capsule: the fibrous capsule, continuous with the periosteum of articulating bones, surrounds the diarthrosis and unites the articulating bones; the joint capsule consists of two layers - (1) the outer fibrous membrane that may contain ligaments and (2) the inner synovial membrane that secretes the lubricating, shock absorbing, and joint-nourishing synovial fluid; the joint capsule is highly innervated, but without blood and lymph vessels, and receives nutrition from the surrounding blood supply via either diffusion (slow), or via convection (fast, more efficient), induced through exercise. Articular cartilage: the bones of a synovial joint are covered by a layer of hyaline cartilage that lines the epiphyses of the joint end of the bone with a smooth, slippery surface that prevents adhesion; articular cartilage functions to absorb shock and reduce friction during movement. Many, but not all, synovial joints also contain additional structures:
== Benefits of laser gum disease surgery == According to the Academy of General Dentistry (AGD), there are benefits to dental lasers including: reduce symptoms and healing times associated with traditional therapies; reduce the amount of bacteria in both diseased gum tissue and in tooth cavities; and control bleeding during surgery. The 1064 Nd:YAG laser kills at least three different periodontal pathogens without harming normal tissues: (Porphyromonas gingivalis (Pg) and Prevotella intermedia (Pi), and Candida albicans (Ca); a pathogenic fungus. This unique aspect of laser irradiation to affect some tissue and not others is termed Selective Photoantisepsis, and is due to differential absorption between host tissue and pathogens. Nd:YAG laser light treatment has shown a long-lasting effect on the shift of bacterial subgingival flora, decreasing pathogenic bacteria and creating an environment where normal flora survives.
== History and taxonomy == Penicillium digitatum is a species within the Ascomycota division of Fungi. The genus name Penicillium comes from the latin word "penicillus", which means brush, referring to the branching appearance of the asexual reproductive structures found within this genus. As a species, P. digitatum was first noted as Aspergillus digitatus by Christiaan Hendrik Persoon in 1794, who later adopted the name Monilia digitata in Synopsis methodica fungorum (1801). The synonym M. digitata can also be found in the writings of Elias Magnus Fries in Systema Mycologicum. However, the current binomial name comes from the writings of Pier Andrea Saccardo, particularly Fungi italici autographie delineati et colorati (1881).
Sources: en.wikipedia.org
Hydrolysis extent indicates the share of peptide bonds that have been cleaved. It is often estimated from free amino groups and is reported as a percentage. A higher value means smaller peptides and more free amino acids, but it does not by itself define product quality.
No. Whey protein isolate is a filtered protein ingredient with most lactose and fat removed. Hydrolysate refers to protein that has been treated to break peptide bonds, and it can be made from isolate, concentrate, or whey itself.
Not directly. Lactose content depends mainly on the starting material and filtration steps. A hydrolysate made from isolate is typically lower in lactose than one made from sweet whey.
It is made from whey, the liquid byproduct of cheese or casein manufacture. The whey protein is treated with enzymes that cleave peptide bonds. The resulting mixture contains peptides of varying lengths plus some free amino acids.