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Topic Review
Surfactants versus Biosurfactants
Based on their origin and composition, surfactants can be divided into three different categories: (i) synthetic surfactants; (ii) bio-based surfactants; and (iii) microbial biosurfactants. The first group is the most widespread and cost-effective. It is composed of surfactants, which are synthetically produced, using non-renewable sources, with a final structure that is different from the natural components of living cells. The second category comprises surfactants of intermediate biocompatibility, usually produced by chemical synthesis but integrating fats, sugars or amino acids obtained from renewable sources into their structure. Finally, the third group of surfactants, designated as microbial biosurfactants, are considered the most biocompatible and eco-friendly, as they are produced by living cells, mostly bacteria and yeasts, without the intermediation of organic synthesis.
  • 4.5K
  • 14 Mar 2021
Topic Review
Education of Midwives in Portugal and Spain
In Europe, midwives education, in accordance with the principles of the Bologna Declaration, are based on the pillars defined by Directive 2005/36/CE and by the Munich Declaration. In Portugal, the candidate applies on their own initiative to one of the Higher Education Institutions (HEIs) that provide such training. At the end of the education, students will achieve the master title. In Spain, the candidate sits for a state exam, which is announced annually by each autonomous community, for admission to the specialization.
  • 4.5K
  • 24 Jun 2022
Topic Review
Pseudoephedrine
Pseudoephedrine (PSE) is a drug with a long history of medical use; it is helpful in treating symptoms of the common cold and flu, sinusitis, asthma, and bronchitis.
  • 4.5K
  • 29 Jun 2021
Topic Review
Triple-Alpha Process
The triple-alpha process is a set of nuclear fusion reactions by which three helium-4 nuclei (alpha particles) are transformed into carbon.
  • 4.5K
  • 22 Nov 2022
Topic Review
DPPH· Stable Free Radical
DPPH· is 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl stable free radical. It was discovered in 1922.
  • 4.5K
  • 24 Feb 2021
Topic Review
Implementation of Food Safety Management
The food industry’s failure in planning and designing of and in implementing a Food Safety Management System and its foundation elements leads, in most instances, to compromised food safety and subsequent foodborne illness outbreaks. This phenomenon was noticed, worldwide, for all food processors, but with a much higher incidence in the medium- and small-sized food processing plants. Our study focuses on the importance of Food Safety Management System (FSMS), Critical Control Points Hazard Analysis (HACCP) and the Prerequisite Programs (PRPs) as the foundation of HACCP, in preventing foodborne outbreaks.
  • 4.5K
  • 27 Sep 2021
Topic Review
Epithelioid Cell
According to a common point of view Epithelioid cells (also called Epithelioid histiocytes) are derivatives of activated macrophages resembling epithelial cells.
  • 4.5K
  • 04 Nov 2022
Topic Review
Transparent Solar Windows
Many modern glass and window products are based on metal-dielectric coatings, which can control properties such as thermal emissivity, heat gain, colour, and transparency. These can also enable solar energy harvesting through PV integration, if the glazing structure is purpose-designed, to include luminescent materials and special microstructures. Recently, significant progress has been demonstrated in building integrated transparent solar windows, which are expected to add momentum towards the development of smart cities. These window systems are, at present in 2019, the only type of transparent and clear construction materials capable of providing significant energy savings in buildings, simultaneously with renewable energy generation.
  • 4.5K
  • 09 Oct 2024
Topic Review
Textile Recycling
Textile reuse consists of the various methods of prolonging the useful service life of textile products from one owner to another. Renting, trading, swapping, borrowing, and inheriting are commonly practiced, which are facilitated by second-hand stores, garage sales, online stores and flea markets, and charities. On the other hand, textile recycling refers to reprocessing pre-consumer and post-consumer textile waste for use in new textile or non-textile products. Various textile recycling technologies such as fiber regeneration, conversion of textile waste into insulation/building materials, fermentation, anaerobic digestion, composting, and thermal recovery are available and progressively improved. Textile reuse and recycling offer environmental sustainability and can reduce environmental impact by reducing the use of virgin textile fiber and avoiding processes further downstream in the textile product life cycle. 
  • 4.5K
  • 28 Mar 2022
Topic Review
Bamboo Node’s Vascular Bundle
The vascular bundle is an important structural unit that determines the growth and properties of bamboo. A high-resolution X-ray microtomography (μCT) was used to observe and reconstruct a three-dimensional (3D) morphometry model of the vascular bundle of the Qiongzhuea tumidinoda node due to its advantages of quick, nondestructive, and accurate testing of plant internal structure.
  • 4.5K
  • 23 Dec 2021
Topic Review
Impact of Wildfires on Ecosystems and Wildlife
Wildfires are common occurrences worldwide that can destroy vast forest areas and kill numerous animals in a few hours. The researchers describe how the different species are expected to behave during a wildfire and the impacts on the ecosystem. 
  • 4.5K
  • 10 Feb 2023
Topic Review
CO2 and H2S Separation Technologies
The emerging economic activities, modernization of technology and progressive transition from coal utilization to low-carbon fuel drive the rising energy demand. Natural gas is well-known as clean energy resources for electricity generation and fuel for transportation. Currently, CO2 and H2S content in gas fields accounts for up to 90% and 15%, respectively. Apart from fulfilling the market demand, the removal of these contaminants from natural gas is critical due to their corrosive natures, low heating value of natural gas and  greenhouse gas effect. To date, numerous gas fields remain unexplored due to high presence of contaminants. Several technologies such as absorption, adsorption, membrane separation and cryogenic distillation have been developed for natural gas sweetening. This entry comprehensively discussed the mechanisms and state-of-the-art of these conventional technologies.
  • 4.5K
  • 03 Mar 2022
Topic Review Peer Reviewed
Microchip Electrophoresis
Microchip electrophoresis (MCE) is a miniaturized form of capillary electrophoresis. Electrophoresis is a common technique to separate macromolecules such as nucleic acids (DNA, RNA) and proteins. This technique has become a routine method for DNA size fragmenting and separating protein mixtures in most laboratories around the world. The application of higher voltages in MCE achieves faster and efficient electrophoretic separations. 
  • 4.5K
  • 13 Apr 2022
Topic Review
Household Food Waste in Bangkok
Food waste (FW) is one of the world’s major crises in both developed and developing countries. Up to 1.3 billion tons of food across the globe is thrown away each year, accounting for one third of all food produced for human consumption and presenting tremendous social, economic, and environmental challenges. In Thailand, FW causes a significant problem when it comes to waste management, particularly in metropolitan areas. Studies conducted between 2005 and 2009 indicated that FW made up the greatest proportion of all waste collected in Bangkok at between 42% and 45%. This waste was generated in households and was usually thrown away into garbage bins, to be collected and buried in landfills by governmental and private sector companies.
  • 4.5K
  • 04 Aug 2021
Topic Review
Distributed Machine Learning in Edge Computing
Distributed edge intelligence is a disruptive research area that enables the execution of machine learning and deep learning (ML/DL) algorithms close to where data are generated. Since edge devices are more limited and heterogeneous than typical cloud devices, many hindrances have to be overcome to fully extract the potential benefits of such an approach (such as data-in-motion analytics).
  • 4.5K
  • 20 Apr 2022
Topic Review
GTK+
GTK+ (formerly GIMP Toolkit) is a cross-platform widget toolkit for creating graphical user interfaces. It is licensed under the terms of the GNU Lesser General Public License, allowing both free and proprietary software to use it. It is, along with Qt, one of the most popular tool-kits for the Wayland and X11 windowing systems.
  • 4.5K
  • 10 Nov 2022
Topic Review
Symmetric Difference
In mathematics, the symmetric difference, also known as the disjunctive union, of two sets is the set of elements which are in either of the sets and not in their intersection. The symmetric difference of the sets A and B is commonly denoted by or or For example, the symmetric difference of the sets [math]\displaystyle{ \{1,2,3\} }[/math] and [math]\displaystyle{ \{3,4\} }[/math] is [math]\displaystyle{ \{1,2,4\} }[/math]. The power set of any set becomes an abelian group under the operation of symmetric difference, with the empty set as the neutral element of the group and every element in this group being its own inverse. The power set of any set becomes a Boolean ring with symmetric difference as the addition of the ring and intersection as the multiplication of the ring.
  • 4.5K
  • 17 Oct 2022
Topic Review
Reclaimed Water
Reclaimed or recycled water (also called wastewater reuse or water reclamation) is the process of converting wastewater into water that can be reused for other purposes. Reuse may include irrigation of gardens and agricultural fields or replenishing surface water and groundwater (i.e., groundwater recharge). Reused water may also be directed toward fulfilling certain needs in residences (e.g. toilet flushing), businesses, and industry, and could even be treated to reach drinking water standards. This last option is called either "direct potable reuse" or "indirect potable" reuse, depending on the approach used. Reclaiming water for reuse applications instead of using freshwater supplies can be a water-saving measure. When used water is eventually discharged back into natural water sources, it can still have benefits to ecosystems, improving streamflow, nourishing plant life and recharging aquifers, as part of the natural water cycle. Wastewater reuse is a long-established practice used for irrigation, especially in arid countries. Reusing wastewater as part of sustainable water management allows water to remain as an alternative water source for human activities. This can reduce scarcity and alleviate pressures on groundwater and other natural water bodies.
  • 4.5K
  • 24 Oct 2022
Topic Review
Language Attrition
Language attrition is the loss of a first or second language or a portion of that language by either a community or an individual. Language attrition is related to multilingualism and language acquisition. Many factors are at play in learning (acquisition) and unlearning (loss) the first and second languages. This can be a simple reversal of learning. In other cases, the type and speed of attrition depends on the individual, also on his or her age and skill level. For the same second language, attrition has been affected differently depending on what is the dominant first language environment. In many cases, attrition could well be case-by-case. Those language learners motivated to keep their first and second languages may very well maintain it, although to do so will likely involve continuous study, or regular use of both.
  • 4.5K
  • 01 Dec 2022
Topic Review Peer Reviewed
Frederick III of Aragon (1296–1337)
Frederick III of Aragon, King of Sicily (1296–1337). Frederick III of Aragon was the third king of the Aragonese dynasty on the throne of Sicily. He ruled from 1296 to 1337 and he was the only Aragonese king of Sicily who made a significant use of his image. In particular, we have four official (namely, commissioned directly by him or his entourage) representations of him: the royal seal, the billon silver denaro coin, the lost mosaic from the Church of Santa Maria della Valle (known as Badiazza) near Messina, and the mosaic in the Cathedral of Messina.
  • 4.5K
  • 13 Apr 2022
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