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Topic Review
Chakma Alphabet
The Chakma alphabet (Ajhā pāṭh), also called Ojhapath, Ojhopath, Aaojhapath, is an abugida used for the Chakma language.
  • 2.1K
  • 30 Oct 2022
Biography
K. A. Shaji
K A Shaji is a South India-based journalist who reports regularly on political developments, environmental issues, health, livelihood, dalit issues, tribal affairs, art, culture and developmental disparities. Travelling extensively in the most backward regions of Kerala, Tamil Nadu and Karnataka, he also writes on poverty, impoverishment and other different forms of rural distress. He is a regu
  • 2.1K
  • 17 Nov 2022
Topic Review
Mortiño (Vaccinium floribundum Kunth)
Mortiño is a member of the Ericaceae family native to the Andes that has been used by local communities for centuries. This species has shown potential in the areas of medicine, agronomy, and green technology. A multidisciplinary approach was used to review aspects related to the ecology, horticulture, composition and potential biotechnological applications of mortiño. 
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  • 05 May 2022
Topic Review
Molecular Mechanism of Alzheimer’s Disease
Alzheimer’s disease (AD) is the most prominent neurodegenerative disorder in the aging population. It is characterized by cognitive decline, gradual neurodegeneration, and the development of amyloid-β (Aβ)-plaques and neurofibrillary tangles, which constitute hyperphosphorylated tau. The early stages of neurodegeneration in AD include the loss of neurons, followed by synaptic impairment. Since the discovery of AD, substantial factual research has surfaced that outlines the disease’s causes, molecular mechanisms, and prospective therapeutics, but a successful cure for the disease has not yet been discovered. This may be attributed to the complicated pathogenesis of AD, the absence of a well-defined molecular mechanism, and the constrained diagnostic resources and treatment options. 
  • 2.1K
  • 25 May 2023
Topic Review
Advanced Hydrogels as Wound Dressings
Skin is the largest organ of the human body, protecting it against the external environment. Despite high self-regeneration potential, severe skin defects will not heal spontaneously and need to be covered by skin substitutes. Tremendous progress has been made in the field of skin tissue engineering, in recent years, to develop new skin substitutes. Among them, hydrogels are one of the candidates with most potential to mimic the native skin microenvironment, due to their porous and hydrated molecular structure. They can be applied as a permanent or temporary dressing for different wounds to support the regeneration and healing of the injured epidermis, dermis, or both. Based on the material used for their fabrication, hydrogels can be subdivided into two main groups—natural and synthetic. Moreover, hydrogels can be reinforced by incorporating nanoparticles to obtain “in situ” hybrid hydrogels, showing superior properties and tailored functionality. In addition, different sensors can be embedded in hydrogel wound dressings to provide real-time information about the wound environment. This review focuses on the most recent developments in the field of hydrogel-based skin substitutes for skin replacement. In particular, we discuss the synthesis, fabrication, and biomedical application of novel “smart” hydrogels.
  • 2.1K
  • 31 Aug 2020
Topic Review
Phenolic Compounds in Mulberry
Mulberry, which belongs to the genus Morus of the Moraceae family, is an aggregated berry that is oval-shaped, rich in nutrition, sweet and soft, with a unique flavor. Mulberry is distributed in east, west and southeast Asia, southern Europe, southern North America, northwestern South America and some areas of Africa. There are 24 species of Morus and one subspecies, with at least 100 known varieties.
  • 2.1K
  • 25 Apr 2022
Topic Review
Hybrid Number
A hybrid number is a generalization of complex numbers [math]\displaystyle{ \left(a+\mathbf{i}b, \mathbf{i}^{2}=-1\right) }[/math], split-complex numbers (or "hyperbolic number") [math]\displaystyle{ \left(a+\mathbf{h}b, \mathbf{h}^2=1\right) }[/math] and dual numbers [math]\displaystyle{ \left(a+\mathbf{\varepsilon} b, \mathbf{\varepsilon}^2 = 0\right) }[/math]. Hybrid numbers form a noncommutative ring. Complex, hyperbolic and dual numbers are well known two-dimensional number systems. It is well known that, the set of complex numbers, hyperbolic numbers and dual numbers are respectively. The algebra of hybrid numbers is a noncommutative algebra which unifies all three number systems calls them hybrid numbers., , . A hybrid number is a number created with any combination of the complex, hyperbolic and dual numbers satisfying the relation Because these numbers are a composition of dual, complex and hyperbolic numbers, Ozdemir calls them hybrid numbers . A commutative two-dimensional unital algebra generated by a 2 by 2 matrix is isomorphic to either complex, dual or hyperbolic numbers . Due to the set of hybrid numbers is a two-dimensional commutative algebra spanned by 1 and [math]\displaystyle{ \mathbf{i}b+c\mathbf{\varepsilon }+d\mathbf{h} }[/math], it is isomorphic to one of the complex, dual or hyperbolic numbers. Especially in the last century, a lot of researchers deal with the geometric and physical applications of these numbers. Just as the geometry of the Euclidean plane can be described with complex numbers, the geometry of the Minkowski plane and Galilean plane can be described with hyperbolic numbers. The group of Euclidean rotations SO(2) is isomorphic to the group U(1) of unit complex numbers. The geometrical meaning of multiplying by [math]\displaystyle{ e^{\mathbf{i}\theta}=\cos \theta +\mathbf{i}\sin \theta }[/math] means a rotation of the plane. , . The group of Lorentzian rotations [math]\displaystyle{ SO(1,1) }[/math] is isomorphic to the group of unit spacelike hyperbolic numbers. This rotation can be viewed as hyperbolic rotation. Thus, multiplying by [math]\displaystyle{ e^{\mathbf{h}\theta }=\cosh \theta +\mathbf{h} \sinh \theta }[/math] means a map of hyperbolic numbers into itself which preserves the Lorentzian metric. , , , The Galilean rotations can be interpreted with dual numbers. The concept of a rotation in the dual number plane is equivalent to a vertical shear mapping since [math]\displaystyle{ \left( 1+x\mathbf{\varepsilon }\right) \left( 1+y\mathbf{\varepsilon }\right) =1+\left( x+y\right) \mathbf{\varepsilon } }[/math]. The Euler formula for dual numbers is [math]\displaystyle{ e^{\mathbf{\varepsilon }\theta }=1+\mathbf{\varepsilon }\theta }[/math]. Multiplying by [math]\displaystyle{ e^{\mathbf{\varepsilon \theta }} }[/math] is a map of dual numbers into itself which preserves the Galilean metric. This rotation can be named as parabolic rotation , , , , , . File:Planar rotations.tif In abstract algebra, the complex, the hyperbolic and the dual numbers can be described as the quotient of the polynomial ring [math]\displaystyle{ \mathbb{R}[x] }[/math] by the ideal generated by the polynomials [math]\displaystyle{ x^2+1, }[/math], [math]\displaystyle{ x^2-1 }[/math] and [math]\displaystyle{ x^{2} }[/math] respectively. That is, Matrix represantations of the units [math]\displaystyle{ \mathbf{i} }[/math], [math]\displaystyle{ \mathbf{\varepsilon } }[/math], [math]\displaystyle{ \mathbf{h} }[/math] are respectively.
  • 2.1K
  • 08 Nov 2022
Biography
Muhammad Qudrat-i-Khuda
Muhammad Qudrat-i-Khuda (c. 1900 – 3 November 1977) was a Bangladeshi[1] organic chemist, educationist and writer.[2] He founded the Bangladesh Council of Scientific and Industrial Research. From 1969 till 1972, he served as the president of the Pakistan Academy of Sciences. After the independence of Bangladesh, as a chairman of the National Education Commission, he published a report named
  • 2.1K
  • 15 Nov 2022
Topic Review
Mobile Phone Tracking
Mobile phone tracking is a process for identifying the location of a mobile phone, whether stationary or moving. Localization may be effected by a number of technologies, such as using multilateration of radio signals between (several) cell towers of the network and the phone, or simply using GPS. To locate a mobile phone using multilateration of radio signals, it must emit at least the idle signal to contact the next nearby antenna tower, but the process does not require an active call. The Global System for Mobile Communications (GSM) is based on the phone's signal strength to nearby antenna masts. Mobile positioning may include location-based services that disclose the actual coordinates of a mobile phone, which is a technology used by telecommunication companies to approximate the location of a mobile phone, and thereby also its user.
  • 2.1K
  • 02 Dec 2022
Topic Review
Influence of Sulfur on the Origin of Life
Sulfur is not only one of the most abundant elements on the Earth, but it is also essential to all living organisms. As life likely began and evolved in a hydrogen sulfide (H2S)-rich environment, sulfur metabolism represents an early form of energy generation via various reactions in prokaryotes and has driven the sulfur biogeochemical cycle since. 
  • 2.1K
  • 28 Dec 2022
Topic Review
Tetrazine-Based Fluorogenic Probes
Various bioorthogonal chemistries have been used for fluorescent imaging owing to the advantageous reactions they employ. Recent advances in bioorthogonal chemistry have revolutionized labeling strategies for fluorescence imaging, with inverse electron demand Diels–Alder (iEDDA) reactions in particular attracting recent attention owing to their fast kinetics and excellent specificity. One of the most interesting features of the iEDDA labeling strategy is that tetrazine-functionalized dyes are known to act as fluorogenic probes.
  • 2.1K
  • 13 Apr 2021
Topic Review
Thymoquinone and Cancer
Thymoquinone (TQ) is a bioactive molecule with anticancer as well as anti-inflammatory activities via the downregulation of several chemokines and cytokines. Administering it as a nanoformulation increases its therapeutic value.
  • 2.1K
  • 22 Sep 2021
Topic Review
Application Programming Interface
Template:Hatnote group An application programming interface (API) is a computing interface which defines interactions between multiple software intermediaries. It defines the kinds of calls or requests that can be made, how to make them, the data formats that should be used, the conventions to follow, etc. It can also provide extension mechanisms so that users can extend existing functionality in various ways and to varying degrees. An API can be entirely custom, specific to a component, or it can be designed based on an industry standard to ensure interoperability. Through information hiding, APIs enable modular programming, which allows users to use the interface independently of the implementation.
  • 2.1K
  • 18 Oct 2022
Topic Review
Google Book Search Settlement Agreement
The Google Book Search Settlement Agreement was a proposal between the Authors Guild, the Association of American Publishers, and Google in the settlement of Authors Guild et al. v. Google, a class action lawsuit alleging copyright infringement on the part of Google. The settlement was initially proposed in 2008, but ultimately rejected by the court in 2011. In November 2013, the presiding U.S. Circuit Judge dismissed Authors Guild et al. v. Google. On April 18, 2016, the Supreme Court turned down an appeal.
  • 2.1K
  • 14 Nov 2022
Topic Review
Optical Sensors
Detection systems using optical principles for ion sensing have become widely used. Optical detection typically relies on the color change resulting from the interaction or reaction between the focal object and the detection reagent. Optical sensors offer the advantages of simplicity and low cost. At the same time, there is no direct contact between the sensor and the sample during analysis, thereby minimizing the effects of contamination of the sensing probe. The portable optical sensors highlighted in this section include fluorescent, colorimetric, Raman scattering, surface plasmon resonance (SPR), and localized surface plasmon resonance (LSPR) sensors.
  • 2.1K
  • 05 May 2023
Topic Review
Photocatalytic Activity of Cobalt-Based Metal–Organic Frameworks
Nowadays, materials with great potential for environmental protection are being sought. Metal–organic frameworks, in particular those with cobalt species as active sites, have drawn considerable interest due to their excellent properties. With the use of Co-based metal–organic frameworks (MOFs) as photocatalysts in reactions (dye degradation, water oxidation and splitting, carbon dioxide reduction, in addition to the oxidation of organic compounds), even over 90% degradation efficiencies of various dyes (e.g., methylene blue) can be achieved. 
  • 2.1K
  • 18 Apr 2022
Topic Review
Porous Silica Nanosphere
Porous silica nanosphere is one of the conventional and common form of silica nanomaterials in the field of nanotechnology. Most common nanopsheres of porous silica are MCM-41, SBA-15 etc. Wide range of applications say catalytic, biological, energy applications have been investigated and reported using this materials.
  • 2.1K
  • 30 Nov 2020
Topic Review
Elderly Consumers
For elderly consumers, the age-related changes drive their specific choices of products and services, which tend to be different from younger adults, and, therefore, have major significance in consumer behavior and marketing.
  • 2.1K
  • 16 Apr 2021
Topic Review
Sperm Sex-Sorting
The utilization of sex-sorted sperm for artificial insemination and in-vitro fertilization is considered a valuable tool for improving production efficiency and optimizing reproductive management in farm animals, subsequently ensuring sufficient food resource for the growing human population. 
  • 2.1K
  • 29 Apr 2021
Topic Review
Elastic Modulus
Elastic modulus (E) is a key parameter in predicting the ability of a material to withstand pressure and plays a critical role in the design of rock engineering projects. E has broad applications in the stability of structures in mining, petroleum, geotechnical engineering, etc. E can be determined directly by conducting laboratory tests, which are time consuming, and require high-quality core samples and costly modern instruments. Thus, devising an indirect estimation method of E has promising prospects.
  • 2.1K
  • 25 Mar 2022
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