Everything below concerns storage. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-10-24. Where a claim depends on a specific study, the study is described rather than over-claimed.
Reconstitution involves adding a suitable diluent, often sterile water or a buffer, to the dried cake. Gentle swirling or inversion helps dissolve the material without creating excessive foam. The time required for complete dissolution can range from seconds to several minutes and depends on the cake structure and the diluent. Improper reconstitution, such as vigorous shaking or using the wrong diluent, can cause protein aggregation or loss of activity. After reconstitution, the product may have a limited shelf life and should be used according to its labeling.
Lyophilized products are typically hygroscopic and require protection from moisture during storage. Manufacturers seal them in glass vials, often under vacuum or an inert gas such as nitrogen. The container closure system, including the stopper and crimp seal, must prevent water vapor ingress. Storage temperature varies from controlled room temperature to refrigerated or frozen conditions, depending on the formulation. Humidity-controlled environments are essential because even brief exposure to ambient air can degrade the product.
Stability of a lyophilized product depends on its glass transition temperature, the temperature at which the amorphous cake transitions from a glassy to a rubbery state. Storage below this temperature minimizes molecular mobility and slows chemical degradation. If the storage temperature exceeds the glass transition temperature, the cake may collapse, shrink, or become sticky. Accelerated stability studies at elevated temperatures and humidity help predict shelf life, but they do not always reflect real-time behavior. Residual moisture content also plays a critical role in long-term stability.
A freeze-dryer consists of a vacuum chamber, temperature-controlled shelves, a condenser, and a vacuum pump. Vials, ampoules, or bulk trays hold the product during the cycle. The condenser traps water vapor as ice at a temperature lower than the product. Cycle development balances shelf temperature, chamber pressure, and time. Scale-up can be difficult because heat and mass transfer change with equipment size, so process analytical tools and conservative validation are often used.
Lyophilization is a dehydration technique in which a product is frozen and the solvent is removed under reduced pressure. The low pressure allows ice to sublimate directly into vapor without passing through a bulk liquid phase. This differs from conventional drying, where heat drives evaporation and can damage heat-sensitive structures. The process is used for biological materials, pharmaceutical formulations, and some foods. Its main advantage is preservation of porous structure and rapid reconstitution.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white porous cake | Color depends on formulation. |
| Typical storage temperature | 2–8 °C | Refrigerated for many biologics. |
| Residual moisture | <1% to 3% | Low moisture improves stability. |
| Container | Sealed glass vial | Often with rubber stopper and aluminum crimp. |
| Reconstitution time | Seconds to minutes | Varies with cake density and diluent. |
Handling and storage practices aim to keep the cake intact and dry. Vials are typically stored upright at controlled temperatures, often between 2 °C and 8 °C or at -20 °C for longer-term use. Reconstitution involves adding a suitable diluent and gently mixing until the solid dissolves. Shaking or rapid injection of diluent can create foam or damage sensitive molecules. Once reconstituted, the product may require refrigeration and use within a defined period.
Residual moisture is a key quality attribute for lyophilized products. Water that remains after secondary drying can affect chemical stability, cake structure, and shelf life. Karl Fischer titration is a common method for measuring water content in the dried solid. The target range varies by product, but many biologics are dried to between 0.5% and 3% water by weight. Acceptable limits are set during development and confirmed by stability studies.
Stability studies examine how temperature, humidity, and time influence a lyophilized product. Accelerated conditions provide early information about degradation pathways, while long-term studies support shelf-life claims. The glass transition temperature of the dried formulation can indicate its physical stability, and storage above this temperature may increase molecular mobility and lead to collapse or aggregation. Container closure integrity also matters because moisture or oxygen ingress can degrade the product, so vial stoppers and seals are part of the quality system.
Freezing determines ice crystal structure and pore size, which affect drying speed and product uniformity. Rapid freezing creates small crystals, while slow freezing creates larger crystals and often faster sublimation. During primary drying, chamber pressure is held below the vapor pressure of ice, and shelf temperature supplies heat for sublimation. The ice front recedes, leaving a porous matrix. Thermal limits such as collapse and eutectic temperatures set safe boundaries for formulation. These limits vary with solute composition and concentration.
Secondary drying removes bound water that remains after ice sublimation. Shelf temperature is raised gradually while pressure remains low, reducing water content to a target range. Over-drying can cause brittleness or electrostatic issues, while under-drying affects stability. The endpoint is often judged by pressure rise tests, temperature measurements, or water content analysis. Scale-up depends on matching heat and mass transfer across equipment sizes. Small changes in shelf temperature or pressure can alter cycle length substantially.
Lyophilization, or freeze-drying, removes water from a material by freezing it and then lowering pressure so ice changes directly to vapor. The process relies on sublimation, the phase transition from solid to gas without an intervening liquid state. It is used for heat-sensitive materials that would degrade in conventional drying. The three stages are freezing, primary drying, and secondary drying, each with distinct temperature and pressure requirements. In practice, cycle design balances these variables.
Melanoma inhibitory activity protein 3 (MIA3), also known as transport and Golgi organization protein 1 (TANGO1), is a protein that in humans is encoded by the MIA3 gene on chromosome 1. It is ubiquitously expressed in many tissues and cell types. MIA3 localizes to the endoplasmic reticulum (ER) exit site, where it binds bulky cargo molecules such as collagens and creates mega transport carriers for the export of cargoes from the ER. This function suggests that it plays a role in assembly of extracellular matrix (ECM) and bone formation. MIA3 has been demonstrated to contribute to both tumor suppression and progression. The MIA3 gene also contains one of 27 loci associated with increased risk of coronary artery disease.. A TANGO1 like protein called TALI is expressed in liver and intestine and shown to be required for the export of bulky very Low density lipoproteins (VLDL) and chylomicrons. TANGO1 and TALI assemble into rings around COPII coats and this function is necessary for export of bulky cargoes. The discovery of TANGO1 and understanding its function has revealed that cargo export from the ER is not be vesicles but involves transient tunnels between the ER exit site and the next compartment of the secretory pathway. Biallelic Mutations in TANGO1 cause syndrome disease and complete loss of TANGO1 leads of defects in bone mineralization.
Pyongyang (Korean: 평양관; MR: P'yŏngyanggwan) is a restaurant chain named after the capital of North Korea, with around 130 locations worldwide. The restaurants are owned and operated by the Haedanghwa Group.
Additionally, some monastic orders follow a pescatarian diet, and members of the Eastern Orthodox Church follow a vegan diet during fasts. There is also a strong association between the Quakers and vegetarianism dating back at least to the 18th century. The association grew in prominence during the 19th century, coupled with growing Quaker concerns in connection with alcohol consumption, anti-vivisection and social purity. The association between the Quaker tradition and vegetarianism, however, becomes most significant with the founding of the Friends' Vegetarian Society in 1902 "to spread a kindlier way of living amongst the Society of Friends."
Methylmalonyl coenzyme A mutase (MUT) is an isomerase enzyme that uses the AdoB12 form and reaction type 1 to convert L-methylmalonyl-CoA to succinyl-CoA, an important step in the catabolic breakdown of some amino acids into succinyl-CoA, which then enters energy production via the citric acid cycle. This functionality is lost in vitamin B12 deficiency, and can be measured clinically as an increased serum methylmalonic acid (MMA) concentration. The MUT function is necessary for proper myelin synthesis. Based on animal research, it is thought that the increased methylmalonyl-CoA hydrolyzes to form methylmalonate (methylmalonic acid), a neurotoxic dicarboxylic acid, causing neurological deterioration.
== Political parties == Parti Communiste Réunionnais or Communist Party of Réunion Partido Comunista Revolucionário or Revolutionary Communist Party Partido Cívico Renovador or Civic Renovation Party, Dominican Republic Partidul Comunist Român or Romanian Communist Party
Sources: en.wikipedia.org
In June 1950, American alarm over the Hukbalahap rebellion during the Cold War prompted President Harry Truman to approve special military assistance that included military advice, sale at cost of military equipment to the Philippines and financial aid under the Joint United States Military Advisory Group (JUSMAG). On August 26, 1950, in an "anniversary celebration" of the Cry of Pugad Lawin, the Huks temporarily seized Santa Cruz, Laguna, and Camp Makabulos, Tarlac, confiscating money, food, weapons, ammunition, clothing, medicine, and office supplies. In September 1950, former USAFFE guerrilla, Ramon Magsaysay was appointed as Minister of National Defense on American advice. With the Hukbalahap rebellion growing in strength and the security situation in the Philippines becoming seriously threatened, Magsaysay urged President Elpidio Quirino to suspend the writ of habeas corpus for the duration of the Huk campaign. On October 18, 1950, Magsaysay captured the Secretariat, including General Secretary José Lava, following the earlier capture of the Politburo in Manila. American assistance allowed Magsaysay to create more BCTs, bringing the total to twenty-six. By 1951, army strength had increased by 60 percent over the previous year with 1,047-man BCTs. Major military offensive campaigns against the Huks were carried out by the 7th, 16th, 17th, and 22nd BCTs.
=== Ligand selanoproteins === Besides the selenocysteine-containing selenoproteins, there are also some selenoproteins known from bacterial species, which have selenium bound noncovalently. Most of these proteins are thought to contain a selenide-ligand to a molybdopterin cofactor at their active sites (e.g. nicotinate dehydrogenase of Eubacterium barkeri, or xanthine dehydrogenases).
UbiPred is a SVM-based prediction server using 31 physicochemical properties for predicting ubiquitylation sites. UbPred is a random forest-based predictor of potential ubiquitination sites in proteins. It was trained on a combined set of 266 non-redundant experimentally verified ubiquitination sites available from our experiments and from two large-scale proteomics studies. CKSAAP_UbSite is SVM-based prediction that employs the composition of k-spaced amino acid pairs surrounding a query site (i.e. any lysine in a query sequence) as input, uses the same dataset as UbPred.
However, other historians prefer to see all of those conflicts as "Hegemonic Wars" or "General Wars", being inter-regional wars on a grand scale, but not worldly. Others consider that the Ottoman–Portuguese confrontations and Ottoman–Habsburg wars can be considered as world conflicts, prototypes of the "Great Game" in Eurasia and the Scramble for Africa, but between two main power-projecting and religious blocs, the Ottomans, as holders of the Muslim Caliphate, and the Habsburgs, as Holy Roman Emperor. Also has been argued that a Catholic-Muslim Global War hadn't started in the clash between Charles V and Suleiman the Magnificent aspirations of Universal powers, but before within the Spanish–Ottoman wars in late Reconquista, due to Catholic Monarchs of Spain's attempt to attack Turks and Mamluks (supporters of Emirate of Granada) in Asia from an circumnavigate expedition to the East Indies (which was the original intentions of Columbus' voyages and of Magellan-Elcano), while also attacking them in Mediterranean Europe and North Africa, aspiring to lead a Global Crusade and Two-front war against the Ottomans. However, the Americas and Oceania were not involved in those conflicts, in which case, other historians consider the Thirty Years' War and Eighty Years' War (specially Iberian–Dutch War) as the first global conflict, pitting the Spanish and Portuguese Empires against the French, Dutch and British Empires and their allies (mostly Protestants, like Danish and Swedish oversea expeditions) across the five continents.
=== Onion salt === Early commercial preparations of onion salt were simply a mixture of onion powder and salt. An example ratio for earlier commercial preparations is one part salt to every five parts of dehydrated onion. Contemporary versions typically utilize dried granulated onion and salt and usually include an anticaking agent. The salt may help prevent the loss of onion flavor in the mixture by reducing the evaporation of onion oil. The development of commercial onion salt preparations included formulating products that reduced the strong odor of onion in the product and on the breath of consumers who eat it. Commercial preparation of onion salt involves the testing and sorting of onions by the degree of onion flavor they have, as flavor constituents can vary considerably among various onion varieties. This is done before mixing to produce a consistent final product. Some commercial onion salt preparations are never touched by human hands, as the stages of processing are all performed using automated processes.
Sources: en.wikipedia.org
== Measurement == Molar masses are almost never measured directly. They may be calculated from standard atomic masses, and are often listed in chemical catalogues and on safety data sheets (SDS). Molar masses typically vary between:
=== Tourism === Tourism is a major part of Hong Kong's economy, accounting for 5% of its GDP. In 2016, 26.6 million visitors contributed HK$258 billion (US$32.9 billion) to the territory, making Hong Kong the 14th-most popular destination for international tourists. It is the most popular Chinese city for tourists, receiving over 70% more visitors than its closest competitor Macau. The city is ranked as one of the most expensive cities for expatriates. However, since 2020, there has been a sharp decline in incoming visitors due to tight COVID-19 travel restrictions. In an attempt to attract tourists back to Hong Kong, the Hong Kong government announced plans to give away 500,000 free airline tickets in 2023. Hong Kong was the second most visited city in the world with 23.2 million visitors in 2025.
On 15 September 2022, during a speech commemorating El Salvador's 201st anniversary of independence, Bukele announced that he would run for re-election in 2024. According to Bukele, "developed countries have re-election, and thanks to the new configuration of the democratic institution of our country, now El Salvador will too". Constitutional lawyers criticized his announcement, saying that presidential re-election violates "at least" four articles of the El Salvador constitution.
== Opinion polls == Polling on voting intention was published from May 2023 onwards, most regularly by the National Institute of Development Administration (NIDA), and increased in frequency after the dissolution of the House in December 2025. The final NIDA survey, conducted between 23 and 27 January 2026 among 2,500 respondents, placed the People's Party on 34.2 per cent and Bhumjaithai on 22.6 per cent. The People's Party did lead the party-list vote at the election, taking 30.56 per cent to Bhumjaithai's 17.90 per cent, though Bhumjaithai won far more seats through the constituencies.
Sources: en.wikipedia.org
Lyophilized products should be stored in airtight containers, protected from moisture and light, at the temperature specified by the manufacturer. Many require refrigeration at 2–8 °C, while some need frozen storage. Always check the product label for specific conditions.
Moisture can cause the porous cake to collapse, increase molecular mobility, and accelerate chemical degradation. It may also promote microbial growth if the product lacks preservatives. Proper sealing and handling are essential to maintain stability.
Some formulations contain labile biological molecules that degrade even in the dry state at higher temperatures. Others have a low glass transition temperature, meaning the cake can soften or collapse at room temperature. Cold storage reduces molecular motion and slows degradation.
Yes, the terms are generally interchangeable. Lyophilization is more common in pharmaceutical and laboratory contexts, while freeze-drying appears widely in food science and general writing. Both describe removal of solvent by sublimation under vacuum after freezing.