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Topic Review
List of Soviet Manned Space Missions
This is a list of the manned space missions conducted by the Soviet space programme. These missions belong to the Vostok, Voskhod, and Soyuz space programs. Note: Soviet manned space missions had not any official patches before Apollo–Soyuz program. After that and until Soyuz TM-12 "Juno" flight mission patches had been designed only for international missions.
  • 2.3K
  • 06 Dec 2022
Topic Review
Synthesis of m-Aryloxy Phenols
Innovative synthetic methods have been developed for the preparation of m-aryloxy phenols, which has allowed for the preparation of complex m-aryloxy phenols with functional groups, such as esters, nitriles, and halogens, that impart specific properties of these compounds.
  • 2.3K
  • 30 Mar 2023
Topic Review
Electric Field-Assisted Membrane Processes
Electrofiltration is emerging as an attractive alternative that uses electric field to assist in fouling mitigation during the membrane-based separation processes. By tuning the electrophoretic forces on the feed side of the membrane, all water constituents (except ions) including viruses, bacteria, small and large molecules, and organic and inorganic solids can be prevented from fouling the membrane surface. Theoretically, the electric field-assisted membrane separation process will result in greatly desired clean water flux for the entire duration of operation.
  • 2.3K
  • 29 Nov 2021
Topic Review
Clinical Applications of MR Spectroscopy in Pediatrics
In vivo MR spectroscopy is a non-invasive methodology that provides information about the biochemistry of tissues. It is available as a “push-button” application on state-of-the-art clinical MR scanners. MR spectroscopy has been used to study various brain diseases including tumors, stroke, trauma, degenerative disorders, epilepsy/seizures, inborn errors, neuropsychiatric disorders, and others.
  • 2.3K
  • 01 Jul 2022
Topic Review
Transactional Analysis
Transactional analysis (TA) is a psychoanalytic theory and method of therapy wherein social interactions (or “transactions”) are analyzed to determine the ego state of the communicator (whether parent-like, childlike, or adult-like) as a basis for understanding behavior. In transactional analysis, the communicator is taught to alter the ego state as a way to solve emotional problems. The method deviates from Freudian psychoanalysis which focuses on increasing awareness of the contents of subconsciously held ideas. Eric Berne developed the concept and paradigm of transactional analysis in the late 1950s.
  • 2.3K
  • 20 Oct 2022
Topic Review
Sound Transmission Class
Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the Sound Reduction Index (SRI) ISO index is used. The STC rating very roughly reflects the decibel reduction of noise that a partition can provide. The STC is useful for evaluating annoyance due to speech sounds, but not music or machinery noise as these sources contain more low frequency energy than speech. There are many ways to improve the sound transmission class of a partition, though the two most basic principles are adding mass and increasing the overall thickness. In general, the sound transmission class of a double leaf wall (e.g. two 4"-thick brick walls separated by a 2" airspace) is greater than a single wall of equivalent mass (e.g. homogeneous 8" brick wall).
  • 2.3K
  • 24 Oct 2022
Topic Review
Convection
Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convection is unspecified, convection due to the effects of thermal expansion and buoyancy can be assumed. Convection may also take place in soft solids or mixtures where particles can flow. Convective flow may be transient (such as when a multiphase mixture of oil and water separates) or steady state (see Convection cell). The convection may be due to gravitational, electromagnetic or fictitious body forces. Heat transfer by natural convection plays a role in the structure of Earth's atmosphere, its oceans, and its mantle. Discrete convective cells in the atmosphere can be identified by clouds, with stronger convection resulting in thunderstorms. Natural convection also plays a role in stellar physics. Convection is often categorised or described by the main effect causing the convective flow, e.g. Thermal convection. Convection cannot take place in most solids because neither bulk current flows nor significant diffusion of matter can take place.
  • 2.3K
  • 02 Dec 2022
Topic Review
Acyl Oxime Ester
The synthetic strategies of oxime derivatives participating in radical-type reactions have been rapidly developed in the last few decades. Among them, the N–O bond cleavage of oxime esters leading to formation of nitrogen-centered radicals triggers adjacent C–C bond cleavage to produce carbon-centered free radicals, which has been virtually used in organic synthesis in recent years.
  • 2.3K
  • 29 Mar 2023
Topic Review
Consumer Reselling
Since e-commerce has revitalized recently in the form of live commerce and Instagram shopping, both purchase and sales have become promoted among consumers while reselling has been facilitated in second-hand item markets and among consumers. Particularly, the new trend of consuming products, rather than merely owning products, has become a mainstream factor in the market. Accordingly, consumers show extraordinary consumption, focusing on the act of purchasing limited edition products of high scarcity and placing more importance on one-off experience rather than ordinary new products or premium products. It was verified that the need for joining was the most critical factor facilitating consumers' reselling of limited edition products. 
  • 2.3K
  • 26 Oct 2020
Topic Review
Quantitative Disease Resistance
Quantitative disease resistance (QDR) is the ability of the plant to reduce pathogen multiplication and is expressed on a continuous scale caused by the simultaneous segregation of many genes affected by environment.
  • 2.3K
  • 19 Jan 2021
Topic Review
Lignin Nanoparticles and Their Nanocomposites
Lignin nanomaterials have emerged as a promising alternative to fossil-based chemicals and products for some potential added-value applications, which benefits from their structural diversity and biodegradability. This review elucidates a perspective in recent research on nanolignins and their nanocomposites. It summarizes the different nanolignin preparation methods, emphasizing anti-solvent precipitation, self-assembly and interfacial crosslinking. Also described are the preparation of various nanocomposites by the chemical modification of nanolignin and compounds with inorganic materials or polymers. Additionally, advances in numerous potential high-value applications, such as use in food packaging, biomedical, chemical engineering and biorefineries, are described.
  • 2.3K
  • 25 Jun 2021
Topic Review
Hard Carbons as Anodes in Sodium-Ion Batteries
Sodium-ion batteries (SIBs) are regarded as promising alternatives to lithium-ion batteries (LIBs) in the field of energy, especially in large-scale energy storage systems. Tremendous effort has been put into the electrode research of SIBs, and hard carbon (HC) stands out among the anode materials due to its advantages in cost, resource, industrial processes, and safety. However, different from the application of graphite in LIBs, HC, as a disordered carbon material, leaves more to be completely comprehended about its sodium storage mechanism, and there is still plenty of room for improvement in its capacity, rate performance and cycling performance.
  • 2.3K
  • 21 Oct 2022
Topic Review
Cubic Mile of Oil
The cubic mile of oil (CMO) is a unit of energy, aiming to give the general public an understanding of large quantities of energy. It is approximately equal to 1.6×1020 joule. It was created by Hew Crane of SRI International to aid in public understanding of global-scale energy consumption and resources. Large scale sources of energy include wind, solar photovoltaic, solar thermal, nuclear, hydroelectric, oil, coal, natural gas, geothermal, and biomass (primarily the burning of wood). Traditionally, many different units are commonly used to measure these sources (e.g., joules, BTUs, kilowatt hours, therms) but only some of them are familiar to a global general public, and some argue that fewer are needed and a standard should be chosen. Still, these common energy units are mainly sized for everyday activities, for example a joule is the energy required to lift a small apple one metre vertically. For regional, national, and global scales, larger energy units, such as exajoule, terawatt-hour, billion barrels of oil equivalent (BBOE) and quad are used. Derived by multiplying the small common units by large powers of ten these larger units pose additional conceptual difficulties for many citizens. Crane intended the cubic mile of oil to provide a visualizable scale for comparing the contributions of these diverse energy components as a percentage of total worldwide, energy use. In 2005, the global economy was consuming approximately 30 billion barrels (4.8 billion cubic metres; 1.3 trillion US gallons) of oil each year. Numbers of this magnitude are difficult to conceive by most people. The volume occupied by 1 trillion US gallons (3.8 billion cubic metres) is about 1 cubic mile (4.2 billion cubic metres). Crane felt that a cubic mile would be an easier concept for the general public than a trillion gallons.
  • 2.3K
  • 28 Oct 2022
Topic Review
Estonian Folklore Archives
The Estonian Folklore Archives (EFA) is the central folklore archives in Estonia. The Archives functions currently as the subdivision of the Estonian Literary Museum but it was established in 1927 as the division of the Estonian National Museum. The current Head of the Archives is Dr. Risto Järv (et).
  • 2.3K
  • 08 Nov 2022
Topic Review
Soybean Molasses in Animal Nutrition
Soybean molasses is a by-product of the soybean processing industry that is accumulated in large quantities and usually disposed of like liquid manure or in landfills, thus causing severe ecological problems. At the same time, soybean molasses has a promising potential to be included regularly in animal diets because of its high nutritive value and functional properties. It is rich in sugars and is a cheap energy source for animals compared to other energy-rich feed ingredients. 
  • 2.3K
  • 25 Mar 2021
Topic Review
Determinants of Chitosan Antifungal Activity
Chitosan (CS), a biopolymer derived from chitin, is known for strong antifungal activity while being biodegradable, biocompatible, and non-toxic. Because of its characteristic it has been widely used in control of fungal pathogens. Antifungal activity of chitosan can be further enhanced by obtaining chitosan nanoparticles (CSNPs).
  • 2.3K
  • 13 Apr 2023
Topic Review
Anti-diabetic Bioactive Peptides
Bioactive peptides released from the enzymatic hydrolysis of food proteins are currently a trending topic in the scientific community. Their potential as antidiabetic agents, by regulating the glycemic index, and thus to be employed in food formulation, is one of the most important functions of these peptides.  The future applicability that these molecules have due to their biological potential as functional ingredients makes them an important field of research, which could help the world population avoid suffering from several diseases, such as diabetes.
  • 2.3K
  • 31 Jul 2020
Topic Review
Plant Defense Strategies against Drought
Drought stress imposes substantial constraints on the growth and production of wheat (Triticum aestivum L.), a globally important cereal crop essential for food security. Plants have evolved various defense mechanisms to withstand environmental variations, such as stress escape, stress avoidance, and stress tolerance.
  • 2.3K
  • 19 Sep 2023
Topic Review
Temperature Sensors for Thermoregulation in Personal Protective Equipment
The exposure to extreme temperatures in workplaces involves physical hazards for workers. A poorly acclimated worker may have lower performance and vigilance and therefore may be more exposed to accidents and injuries. Due to the incompatibility of the existing standards implemented in some workplaces and the lack of thermoregulation in many types of protective equipment, thermal stress remains one of the most frequent physical hazards in many work sectors. In order to provide a better protection of individuals against thermal aggressors, the scientific community has been interested in the development of the textile-based or flexible temperature sensors that can be integrated into personal protective equipment. These sensors can measure the skin temperature and monitor the microclimate temperature between the body and the clothing or the outside temperature during exposure to thermal aggressors. 
  • 2.3K
  • 29 Jan 2022
Topic Review
β-glucosidases
β-glucosidases (EC. 3.2.1.21) are enzymes that hydrolyze glucosidic bonds of oligosaccharides, in special disaccharides, such as cellobiose, realizing glucose at the end of the process. They are highly used in second-generation biofuel production. 
  • 2.3K
  • 29 Jan 2024
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