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Topic Review
Eyelash Curler
An eyelash curler is a hand-operated mechanical device for curling eyelashes for cosmetic purposes. Usually only the upper eyelashes are curled.
  • 11.9K
  • 25 Nov 2022
Topic Review
The Process of Wound Healing
Wound healing is a recovering process of damaged tissues by replacing dysfunctional injured cellular structures. Wounds occur as a result of accidental or surgical trauma and from a variety of medical conditions. This wound often causes pain, inflammation, and loss of function, which affects a patient’s life and financial costs.
  • 11.9K
  • 06 Sep 2022
Topic Review
Clay Bricks
Clay bricks are extensively used as building material worldwide. Natural soil deposits are in constant reduction due to the frequent use of clay to manufacture bricks. About 1600 billion bricks are produced annually by the consumption of millions of tons of natural resources.
  • 11.8K
  • 18 Sep 2021
Topic Review
Recovery of Banana Waste-Loss
Banana is a tropical fruit grown in more than 130 countries. It is the second most produced fruit after citrus, contributing around 16% of world fruit production and the fourth most important food crop after rice, wheat and corn. Banana is very nutritious and digests better than many other fruits. After harvest, almost 60% of banana biomass is left as waste. Worldwide, about 114.08 million metric tons of banana waste-loss are produced, leading to environmental problems such as the excessive emission of greenhouse gases. These wastes contain a high content of paramount industrial importance, such as cellulose, hemicellulose and natural fibers that various processes can modify, such as bacterial fermentation and anaerobic degradation, to obtain bioplastics, organic fertilizers and biofuels such as ethanol, biogas, hydrogen and biodiesel. In addition, they can be used in wastewater treatment methods by producing low-cost biofilters and obtaining activated carbon from rachis and banana peel. Furthermore, nanometric fibers commonly used in nanotechnology applications and silver nanoparticles useful in therapeutic cancer treatments, can be produced from banana pseudostems. 
  • 11.8K
  • 22 Sep 2021
Topic Review
Circassian Beauties
Circassian beauty or Adyghe beauty (Adyghe: Адыгэ пшъашъэ, romanized: Adıgə pş̂aş̂ə) is a stereotype and a belief used to refer to an idealized image of the women of the Circassian people of the Northwestern Caucasus. A fairly extensive literary history suggests that Circassian women were thought to be unusually beautiful, spirited, and elegant, and as such were desirable as concubines. This reputation dates back to the Late Middle Ages, when the Circassian coast was frequented by traders from Genoa, and the founder of the Medici dynasty, Cosimo de' Medici, had an illegitimate son from a Circassian slave. During the Ottoman Empire and Persian Safavid and Qajar dynasties, Circassian women living as slaves in the Sultan's Imperial Harem and Shah's harems started to build their reputation as extremely beautiful and genteel, which then became a common trope in Western Orientalism. As a result of this reputation, in Europe and America Circassians were often characterised as ideals of feminine beauty in poetry and art. Cosmetic products were advertised, from the 18th century on, using the word "Circassian" in the title, or claiming that the product was based on substances used by the women of Circassia. In consequence, most wives of several Ottoman Sultans were ethnic Circassians converted to Islam, e.g. Valide Sultans (Empress mothers), including Perestü Valide Sultan, Şevkefza Valide Sultan, Tirimüjgan Valide Sultan, Nükhetseza Başhanımefendi, other important Hatuns (Ladies) and Sultans like Şemsiruhsar Hatun and Saçbağlı Sultan, Haseki sultans (chief consorts) such as Hümaşah Haseki Sultan, Hatice Muazzez Haseki Sultan, and Ayşe Haseki Sultan besides numerous Başkadınefendis (most senior consorts), including Bedrifelek I, Bidar II, Kamures I, and Servetseza I as well as Kadınefendis (senior consorts) such as Bezmara VI, Düzdidil III, Hayranıdil II, Meyliservet IV, Mihrengiz II, Neşerek III, Nurefsun II, Reftaridil II, Şayan III, amongst many others, or İkbals (honoured lady consorts), most notable of them being Cevherriz II, Ceylanyar II, Dilfirib I, Nalanıdil III, and Nergis IV in addition to Gözdes (favourite lady consorts), including Dürdane I, Hüsnicenan III, Safderun IV, amongst others. The "golden age" of the Circassian beauty may be considered to be between the 1770s, when the Russian Empire seized the Crimean Khanate and cut off their slave trade, which increased the demand for Circassian women in Near Eastern harems; and the 1860s, when the Russians massacred thousands of Circassians and conquered Circassia. In the 1860s the showman P. T. Barnum exhibited women who he claimed were Circassian beauties. They wore a distinctive curly, big hair style, which had no precedent in earlier portrayals of Circassians, but which was soon copied by other female performers in the United States, who became known as "moss-haired girls". This hair style was a sort of exhibit's trademark and was achieved by washing the hair of women in beer, drying it and then teasing it. It is not clear why Barnum chose this hairstyle. It may have been a reference to the Circassian fur hat, rather than the hair. There were also several classical Turkish music pieces and poems that praise the beauty of the Circassian ethnic group like "Lepiska Saçlı Çerkes" (Straight, flaxen-haired Circassian; "lepiska" refers to long blonde hair which is straight, as if flatironed). As a foreign group, they were always praised in Turkey for what they labeled as distinct and pure European features.
  • 11.8K
  • 24 Nov 2022
Topic Review
List of ASTM International Standards (F)
This is a list of ASTM International standards for "Materials for Specific Applications".
  • 11.8K
  • 24 Nov 2022
Topic Review
Ingredients of Moisturizers
Moisturizers are one of the most widely used preparations in cosmetics and have been extensively used to soften the skin for consumers. Moisturizers work effectively in combating dry skin which may cause pain, tightness, itch, stinging, and/or tingling. Knowing the characteristics and interactions of active ingredients with the skin will allow for better utilization of available moisturizers.
  • 11.8K
  • 11 Jul 2022
Topic Review
Humid Continental Climate
A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold in the northern areas) winters. Precipitation is usually distributed throughout the year. The definition of this climate regarding temperature is as follows: the mean temperature of the coldest month must be below −3 °C (26.6 °F) and there must be at least four months whose mean temperatures are at or above 10 °C (50 °F). In addition, the location in question must not be semi-arid or arid. The Dfb, Dwb and Dsb subtypes are also known as hemiboreal. Humid continental climates are generally found roughly between latitudes 40° N and 60° N, within the central and northeastern portions of North America, Europe, and Asia. They are much less commonly found in the Southern Hemisphere due to the larger ocean area at that latitude and the consequent greater maritime moderation. In the Northern Hemisphere some of the humid continental climates, typically in Hokkaido, Northern Honshu, Sakhalin island, Scandinavia, Nova Scotia, and Newfoundland are heavily maritime-influenced, with relatively cool summers and winters being just below the freezing mark. More extreme humid continental climates found in northeast China , southern Siberia, the Canadian Prairies, and the Great Lakes region of the American Midwest and Central Canada combine hotter summer maxima and colder winters than the marine-based variety.
  • 11.8K
  • 29 Sep 2022
Topic Review
Types of Electrochemical Sensors
The world of sensors is diverse and is advancing at a rapid pace due to the fact of its high demand and constant technological improvements. Electrochemical sensors provide a low-cost and convenient solution for the detection of variable analytes and are widely utilized in agriculture, food, and oil industries as well as in environmental and biomedical applications. The popularity of electrochemical sensing stems from two main advantages: the variability of the reporting signals, such as the voltage, current, overall power output, or electrochemical impedance, and the low theoretical detection limits that originate from the differences in the Faradaic and nonFaradaic currents.
  • 11.8K
  • 09 Nov 2022
Topic Review
Partition (Number Theory)
In number theory and combinatorics, a partition of a positive integer n, also called an integer partition, is a way of writing n as a sum of positive integers. Two sums that differ only in the order of their summands are considered the same partition. (If order matters, the sum becomes a composition.) For example, 4 can be partitioned in five distinct ways: 4 3 + 1 2 + 2 2 + 1 + 1 1 + 1 + 1 + 1 The order-dependent composition 1 + 3 is the same partition as 3 + 1, and the two distinct compositions 1 + 2 + 1 and 1 + 1 + 2 represent the same partition 2 + 1 + 1. A summand in a partition is also called a part. The number of partitions of n is given by the partition function p(n). So p(4) = 5. The notation λ ⊢ n means that λ is a partition of n. Partitions can be graphically visualized with Young diagrams or Ferrers diagrams. They occur in a number of branches of mathematics and physics, including the study of symmetric polynomials and of the symmetric group and in group representation theory in general.
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  • 04 Nov 2022
Topic Review
Orgasm
Orgasm (from Greek ὀργασμός, orgasmos; "excitement, swelling") or sexual climax is the sudden discharge of accumulated sexual excitement during the sexual response cycle, resulting in rhythmic, involuntary muscular contractions in the pelvic region characterized by sexual pleasure. Experienced by males and females, orgasms are controlled by the involuntary or autonomic nervous system. They are usually associated with involuntary actions, including muscular spasms in multiple areas of the body, a general euphoric sensation and, frequently, body movements and vocalizations. The period after orgasm (known as the refractory period) is typically a relaxing experience, attributed to the release of the neurohormones oxytocin and prolactin as well as endorphins (or "endogenous morphine"). Human orgasms usually result from physical sexual stimulation of the penis in males (typically accompanying ejaculation) and of the clitoris in females. Sexual stimulation can be by self-practice (masturbation) or with a sex partner (penetrative sex, non-penetrative sex, or other sexual activity). The health effects surrounding the human orgasm are diverse. There are many physiological responses during sexual activity, including a relaxed state created by prolactin, as well as changes in the central nervous system such as a temporary decrease in the metabolic activity of large parts of the cerebral cortex while there is no change or increased metabolic activity in the limbic (i.e., "bordering") areas of the brain. There is also a wide range of sexual dysfunctions, such as anorgasmia. These effects affect cultural views of orgasm, such as the beliefs that orgasm and the frequency or consistency of it are either important or irrelevant for satisfaction in a sexual relationship, and theories about the biological and evolutionary functions of orgasm.
  • 11.7K
  • 30 Nov 2022
Topic Review
Bryophyllum Pinnatum
Bryophyllum pinnatum, also known as the air plant, cathedral bells, life plant, miracle leaf, and Goethe plant is a succulent plant native to Madagascar , which is a popular houseplant and has become naturalized in tropical and subtropical areas. It is distinctive for the profusion of miniature plantlets that form on the margins of its phylloclades, a trait it has in common with some other members of its genus. Many people also currently call this plant Kalanchoe pinnata. It is a succulent, perennial plant, about 1 m (39 in) tall, with a fleshy cylindrical stem and a reddish color for the youngest and it flowers most of the year. The specific epithet "pinnata" is the feminine form of the Latin adjective pinnatus, meaning "winged, pinnate".
  • 11.7K
  • 30 Nov 2022
Topic Review
Artificial Intelligence in Education (AIED)
Artificial Intelligence in Education (AIED) has 3 meanings : The first is “education for understanding AI,” which aims to develop the ability to understand and handle AI. The second is “education using AI,” which applies AI to effective teaching and learning in each subject. The third is “AI expert training,” which cultivates experts who develop AI and teachers who teach AI.
  • 11.7K
  • 27 Jul 2021
Topic Review
Water Literacy
Water literacy may be considered generally as the culmination of water-related knowledge, attitudes and behaviors.  It holds growing importance for sustainable water resource use and management.  While use and definitions of the concept of water literacy vary broadly in the literature, the synthesis of these identifies common elements and themes in a holistic framework.
  • 11.7K
  • 03 Feb 2022
Topic Review
Peculiarities of Tumor Cell Metabolism for Cancer Treatment
In tumor cells, ketolysis “via” succinyl-CoA: 3-oxoacid-CoAtransferase (SCOT) and acetyl-CoA acetyltransferase 1 (ACAT1) is a major source of mitochondrial acetyl-CoA. Active ACAT1 tetramers stabilize by tyrosine phosphorylation, which facilitates the SCOT reaction and ketolysis. Tyrosine phosphorylation of pyruvate kinase PK M2 has the opposite effect, stabilizing inactive dimers, while pyruvate dehydrogenase (PDH), which is already inhibited by phosphorylation, is acetylated by ACAT1 and is doubly locked. This closes the glycolytic supply of acetyl-CoA. In addition, since tumor cells must synthesize fatty acids to create new membranes, they automatically turn off the degradation of fatty acids into acetyl-CoA (“via” the malonyl-CoA brake for the fatty acid carnityl transporter). Thus, inhibiting SCOT the specific ketolytic enzyme and ACAT1 should hold back tumor progression. However, tumor cells are still able to take up external acetate and convert it into acetyl-CoA in their cytosol “via” an acetyl-CoA synthetase, which feeds the lipogenic pathway; additionally, inhibiting this enzyme would make it difficult for tumor cells to form new lipid membrane and survive.
  • 11.7K
  • 21 Feb 2023
Topic Review
The Hook
The Hook, or The Hookman, is an urban legend about a killer with a pirate-like hook for a hand attacking a couple in a parked car. The story is thought to date from at least the mid-1950s, and gained significant attention when it was reprinted in the advice column Dear Abby in 1960. It has since become a morality archetype in popular culture, and has been referenced in various horror films.
  • 11.7K
  • 03 Mar 2023
Topic Review
Bearing (Navigation)
In navigation, bearing is the horizontal angle between the direction of an object and another object, or between it and that of true north.
  • 11.7K
  • 05 Dec 2022
Topic Review
Rainfall Data
As is widely recognized, rainfall data is necessary for the mathematical modelling of extreme hydrological events, such as droughts or floods, as well as for evaluating surface and subsurface water resources and their quality. The phase, quantity, and elevation of generic hydrometeors in the atmosphere can be estimated by ground-based radars. Satellites can provide images with visible and infrared radiation, and they can also serve as platforms for radiometers to derive the quantity and phase of hydrometeors. Radars and satellites provide spatial information on precipitation at wide scales, avoiding many problems connected to local ground measurements, including those for the areal inhomogeneity of a network. However, direct rainfall observations at point scale can be obtained only by rain gauges installed at the soil surface.
  • 11.7K
  • 29 Jan 2022
Topic Review
Application of Standardized Regression Coefficient in Meta-Analysis
The β coefficient is the estimate resulting from an analysis carried out on variables that have been standardized so that their standard deviations (and variances) are equal to one. Therefore, the standardized coefficient refers to how many standard deviations the response or outcome variable will change per a standard deviation increase in the explanatory or predictor variable. Thus, the standardized coefficient β can be regarded as an attempt to make regression coefficients more comparable, and can be used as an effect-size estimate when the exposure levels in original studies are measured in different units of measurement.
  • 11.6K
  • 14 Sep 2022
Topic Review
Electric Arc Furnace Slag
EAF slag is a non-metallic by-product that consists mainly of silicates and oxides formed during the process of refining the molten steel. Raw EAF slag often appears as grey or black colored lumps, depending on its ferrous oxide content. This type of slag generally has a rough surface texture, with a surface pore diameter of 0.01–10 μm.
  • 11.6K
  • 26 Oct 2020
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