Everything below concerns Collapse temperature. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
Lyophilization removes water from a frozen material by sublimation under reduced pressure. The process begins with freezing, which converts liquid water into ice and concentrates dissolved solids. Primary drying then lowers chamber pressure so ice changes directly into vapor without passing through a liquid phase. Secondary drying raises the shelf temperature to remove bound water that remains after ice sublimation. The result is a dry, porous structure that can be reconstituted later.
Formulation composition influences whether freeze-drying produces an intact cake or a collapsed mass. Excipients such as sugars and polymers can raise the collapse temperature and provide bulk during drying. The critical temperature for primary drying is often the collapse temperature or the glass transition temperature of the maximally concentrated phase. If the product temperature exceeds this threshold, the frozen matrix may soften and lose structure. Established practice therefore links shelf temperature and chamber pressure to the formulation's thermal properties.
Quality control for lyophilized materials includes visual inspection, residual moisture measurement, and reconstitution testing. Cake appearance can reveal process problems such as collapse, shrinkage, or meltback, although appearance alone does not prove potency. Residual moisture is commonly measured by Karl Fischer titration or by loss on drying. Reconstitution time is checked because a slow or incomplete dissolve can indicate a change in pore structure. Stability studies track these attributes over time under defined temperature and humidity conditions.
Analytical methods for lyophilized solids must account for the low moisture content and the fragile cake. Karl Fischer titration is widely used for water content, while near-infrared spectroscopy can measure moisture non-destructively in sealed containers. X-ray diffraction and modulated differential scanning calorimetry help identify crystalline or amorphous phases. Residual solvent analysis may be needed if organic solvents were used during formulation. The combination of these methods supports batch release and long-term stability assessment.
| Property | Value | Notes |
|---|---|---|
| Common name | Freeze-drying | Process removes water by sublimation under vacuum. |
| Typical primary drying shelf temperature | -40 C to -10 C | Set below the formulation's collapse temperature. |
| Typical chamber pressure | 0.05-0.3 mbar | Low pressure allows ice to sublime below its triple point. |
| Water content after drying | 0.5-3% by weight | Higher values may reduce storage stability for some materials. |
| Key thermal parameter | Collapse temperature | Measured by freeze-drying microscopy or differential scanning calorimetry. |
The GABA transporter 1 (GAT-1) and GABA reuptake inhibitor tiagabine (Gabitril) is approved and clinically used as an anticonvulsant. It has also been used off-label in the treatment of anxiety disorders and other conditions. The drug increases γ-aminobutyric acid (GABA) levels in the brain and has been found to improve sleep, including by increasing slow wave sleep (deep sleep). In addition, tiagabine has been reported to make sleep feel more restorative and to improve some cognitive outcomes. The drug has an elimination half-life of 5 to 8 hours. While tiagabine may have hypnotic effects, off-label use is discouraged as it has been associated with new-onset seizures in people without epilepsy.
Teicoplanin is a glycopeptide antibiotic with a spectrum of activity similar to vancomycin. Its mechanism of action is to inhibit bacterial cell wall peptidoglycan synthesis. It is used in the prophylaxis and treatment of serious infections caused by Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus and Enterococcus faecalis. Teicoplanin is widely available in many European, Asian, and South American countries, however it is not currently approved by the US Food and Drug Administration and is not commercially available in the United States. Teicoplanin is marketed by Sanofi-Aventis under the trade name Targocid. Other trade names include Ticocin marketed by Cipla(India). Its strength is considered to be due to the length of the hydrocarbon chain.
== Molecular properties and chemical space of peptides == The chemical space of peptides is defined as a multidimensional landscape shaped by molecular descriptors or fingerprints. Within these frameworks, the distance between specific molecules serves as a proxy for chemical or functional similarity. This space can be mapped using primary amino acid sequences, three-dimensional structural data, or a combination of both. Key molecular properties used for mapping include molecular weight, lipophilicity (logP and logD), topological polar surface area (TPSA), and hydrogen-bond dynamics. Dimensionality-reduction techniques—such as Principal Component Analysis (PCA), t-SNE, and UMAP—are frequently employed alongside clustering algorithms to visualize peptide libraries and identify clusters with related biological activities. Peptides are distinguished from traditional small molecules by their unique combination of residue sequence, amide backbone flexibility, and susceptibility to chemical modifications, all of which dictate bioavailability and membrane permeability. Computational analysis is supported by notation systems like FASTA, HELM, and BILN for encoding both canonical and modified sequences. Modifications such as cyclization or the integration of non-natural amino acids significantly shift a peptide's position within the chemical space, altering its stability and target affinity. Consequently, chemical-space analysis is a vital tool for virtual screening and the discovery of shared bioactivity regions across different peptide families.
She co-presented the 2017 BRIT Awards in February alongside Dermot O'Leary. She hosted The BRITs Are Coming for a second year in January 2018. Agreed in August 2017, she presented Your Song in October 2017, a one-off special for ITV. On 3 March 2018, Willis made a surprise appearance on Ant & Dec's Saturday Night Takeaway, as she presented Win the Ads while the main hosts playing the game as part of the show's 100th episode.
Sources: en.wikipedia.org
== Gene == The COL3A1 gene is located on the long (q) arm of chromosome 2 at 2q32.2, between positions 188974372 and 189012745. The gene has 51 exons and is approximately 40 kbp long. The COL3A1 gene is in tail-to-tail orientation with a gene for another fibrillar collagen, namely COL5A2. Two transcripts are generated from the gene using different polyadenylation sites. Although alternatively spliced transcripts have been detected for this gene, they are the result of mutations; these mutations alter RNA splicing, often leading to the exclusion of an exon or use of cryptic splice sites. The resulting defective protein is the cause of a severe, rare disease, the vascular type of Ehlers-Danlos syndrome (vEDS). These studies have also provided important information about RNA splicing mechanisms in multi-exon genes.
Since radioactivity was discovered around the beginning of the 20th century, the main application of radioluminescence has been in radioluminescent paint, used on watch and compass dials, gunsights, aircraft flight instrument faces, and other instruments, allowing them to be seen in darkness. Radioluminescent paint consists of a mixture of a chemical containing a radioisotope with a radioluminescent chemical (phosphor). The continuous radioactive decay of the isotope's atoms releases radiation particles which strike the molecules of the phosphor, causing them to emit light. The constant bombardment by radioactive particles causes the chemical breakdown of many types of phosphor, so radioluminescent paints lose some of their luminosity during their working life. Radioluminescent materials may also be used in the construction of an optoelectric nuclear battery, a type of radioisotope generator in which nuclear energy is converted into light. The radioluminescence of nitrogen in air can be used to detect alpha radiation in nuclear contamination sites.
== Side effects and contraindications == The side effects encountered are anorexia, nausea, diarrhea, metallic taste, and weight loss. Its use is contraindicated in diabetic coma, ketoacidosis, severe infection, trauma, other conditions where buformin is unlikely to control the hyperglycemia, renal or hepatic impairment, heart failure, recent myocardial infarct, dehydration, alcoholism, and conditions likely to predispose to lactic acidosis.
The US Institute of Medicine (IOM) updated Estimated Average Requirements (EARs) and Recommended Dietary Allowances (RDAs) for B vitamins in 1998. At that time, there was not sufficient information to establish EARs and RDAs for pantothenic acid. In instances such as this, the Board sets Adequate Intakes (AIs), with the understanding that at some later date, AIs may be replaced by more exact information. The current AI for teens and adults ages 14 and up is 5 mg/day. This was based in part on the observation that for a typical diet, urinary excretion was approximately 2.6 mg/day, and that bioavailability of food-bound pantothenic acid was roughly 50%. AI for pregnancy is 6 mg/day. AI for lactation is 7 mg/day. For infants up to 12 months, the AI is 1.8 mg/day. For children ages 1–13 years, the AI increases with age from 2 to 4 mg/day. Collectively the EARs, RDAs, AIs and ULs are referred to as Dietary Reference Intakes (DRIs).
Digico was a British computer company founded in 1965. Digico was best known for its 16-bit minicomputer series, the Micro 16. Later Digico started manufacturing a networked CP/M based microcomputer system with business software options, named Digico Prince.
Sources: en.wikipedia.org
The Essendon Football Club, nicknamed the Bombers or colloquially the Dons, is a professional Australian rules football club that plays in the Australian Football League (AFL), the game's premier competition. Formed by the McCracken family in their Ascot Vale home in 1872, the club played its first recorded game in 1873. From 1878 until 1896, the club played in the Victorian Football Association (VFA), where it won four consecutive premierships between 1891 and 1894. In 1896, Essendon joined seven other clubs to form the breakaway Victorian Football League (known as the AFL since 1990), winning the inaugural VFL premiership in 1897. Headquartered at Windy Hill from 1922 to 2013, the club moved to The Hangar in late 2013. The club currently shares its home games between Docklands Stadium and the Melbourne Cricket Ground. Andrew McGrath serves as the club captain as of 2026. Essendon is one of Australia's most successful and prominent football clubs, having won 16 VFL/AFL premierships, which is tied (along with Carlton and Collingwood) for the most of any club in the competition. The club experienced notable golden eras under captain-coach Dick Reynolds in the 1940s and 1950s, and under coach Kevin Sheedy from the 1980s to the early 2000s, cultivating the iconic "Baby Bombers" team in 1993 and recording a historically dominant season in 2000. However, the club has struggled to achieve significant on-field success in the 21st century, having not won a finals match since 2004.
Hari, Johann (2015). Chasing the Scream: The First and Last Days of the War on Drugs. London; New York: Bloomsbury. ISBN 978-1-62040-890-2. Blanchard, Michael; Chin, Gabriel J. (1998). "Identifying the Enemy in the War on Drugs: A Critique of the Developing Rule Permitting Visual Identification of Indescript White Powders in Narcotics Prosecutions". American University Law Review (47): 557. SSRN 1128945. Daniel Burton-Rose, The Celling of America: An Inside Look at the U.S. Prison Industry. Common Courage Press, 1998. Stephanie R. Bush-Baskette, "The War on Drugs as a War on Black Women", in Meda Chesney-Lind and Lisa Pasko (eds.), Girls, Women, and Crime: Selected Readings. Sage, 2004. Chin, Gabriel (2002). "Race, the War on Drugs and the Collateral Consequences of Criminal Conviction". Gender, Race & Justice (6): 253. SSRN 390109. Alexander Cockburn and Jeffrey St. Clair, Whiteout: The CIA, Drugs and the Press. New York: Verso, 1998. Mitchell Earlywine, Understanding Marijuana: A New Look at the Scientific Evidence. New York: Oxford University Press, 2005. Kathleen J. Frydl, The Drug Wars in America, 1940–1973. New York: Cambridge University Press, 2013. Nunn, Kenneth B. (2002). "Race, Crime and the Pool of Surplus Criminality: Or Why the War on Drugs Was a War on Blacks". Gender, Race & Justice. 6 (6): 381. Tony Payan, "A War that Can't Be Won." Tucson: The University of Arizona Press, 2013. Preston Peet, Under the Influence: The Disinformation Guide to Drugs. The Disinformation Company, 2004. Thomas C.
Generally, monazite performs better in recording metamorphism (recrystallisation ages) with different zonation patterns in ages and composition. Zircon is not as reactive as monazite during metamorphic reactions and is better for recording igneous events (cooling ages). Moreover, monazite is more suitable in dating relatively low-temperature metamorphism for example amphibolite-facies than zircon.
Like Truman and Eisenhower, John F. Kennedy supported containment. President Eisenhower's New Look policy had emphasized the use of less expensive nuclear weapons to deter Soviet aggression by threatening massive nuclear attacks on all of the Soviet Union. Nuclear weapons were much cheaper than maintaining a large standing army, so Eisenhower cut conventional forces to save money. Kennedy implemented a new strategy known as flexible response. This strategy relied on conventional arms to achieve limited goals. As part of this policy, Kennedy expanded the United States special operations forces, elite military units that could fight unconventionally in various conflicts. Kennedy hoped that the flexible response strategy would allow the US to counter Soviet influence without resorting to nuclear war. To support his new strategy, Kennedy ordered a massive increase in defense spending and a rapid build-up of the nuclear arsenal to restore the lost superiority over the Soviet Union. In his inaugural address, Kennedy promised "to bear any burden" in the defense of liberty, and he repeatedly asked for increases in military spending and authorization of new weapons systems. From 1961 to 1964, the number of nuclear weapons increased by 50 percent, as did the number of B-52 bombers to deliver them. The new ICBM force grew from 63 intercontinental ballistic missiles to 424. He authorized 23 new Polaris submarines, each of which carried 16 nuclear missiles. Kennedy also called on cities to construct fallout shelters.
Sources: en.wikipedia.org
Primary drying removes ice by sublimation at low pressure and low shelf temperature. Secondary drying removes bound water by raising the shelf temperature, often under the same vacuum. The two stages differ in the water state being removed.
Freezing determines ice crystal size, pore structure, and the concentration of solutes in remaining liquid. Faster freezing generally creates smaller ice crystals and a denser dried matrix. These features affect drying rate and reconstitution behavior.
Lyophilization reduces water content but usually leaves a small amount of water in the dried material. Some water remains bound to solids or trapped in the dried matrix. Very low water targets can require extended secondary drying, which may alter product stability.
Most lyophilized products are stored in sealed containers at controlled temperature and humidity. Some require refrigeration, while others are stable at room temperature. Protection from light and moisture is often necessary.