Products related to Acetylsalicylic:
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Raman Scattering on Emerging Semiconductors and Oxides
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Magneto-Optics and Spectroscopy of Antiferromagnets
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What are salicylic acid and acetylsalicylic acid?
Salicylic acid is a naturally occurring compound found in plants, particularly in the bark of willow trees. It is commonly used in skincare products for its exfoliating and anti-inflammatory properties. Acetylsalicylic acid, also known as aspirin, is a synthetic derivative of salicylic acid. It is widely used as a pain reliever, fever reducer, and anti-inflammatory medication. Both salicylic acid and acetylsalicylic acid belong to the class of compounds known as salicylates.
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How is salicylic acid produced from acetylsalicylic acid?
Salicylic acid is produced from acetylsalicylic acid through a process called hydrolysis. In this process, acetylsalicylic acid is mixed with water and a strong acid, such as sulfuric acid, to break the ester bond in acetylsalicylic acid. This reaction results in the formation of salicylic acid and acetic acid. Salicylic acid can then be isolated and purified from the reaction mixture. This process allows for the conversion of acetylsalicylic acid, commonly known as aspirin, into salicylic acid, which is used in various skincare products and as a precursor for the production of other pharmaceuticals.
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Which acid is stronger, salicylic acid or acetylsalicylic acid?
Salicylic acid is stronger than acetylsalicylic acid. This is because acetylsalicylic acid is a derivative of salicylic acid, and the addition of an acetyl group to the molecule reduces its acidity. Salicylic acid is a beta-hydroxy acid that is commonly used in skincare products for its exfoliating properties, while acetylsalicylic acid is the active ingredient in aspirin and is used primarily as a pain reliever and anti-inflammatory medication.
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How is the synthesis of acetylsalicylic acid carried out?
The synthesis of acetylsalicylic acid, commonly known as aspirin, is carried out through a reaction between salicylic acid and acetic anhydride. The reaction is catalyzed by a strong acid, such as sulfuric acid, which helps in the formation of the acetylsalicylic acid. The acetic anhydride reacts with the hydroxyl group of the salicylic acid, resulting in the formation of acetylsalicylic acid and acetic acid as byproduct. The reaction is typically carried out under controlled conditions, and the resulting product is then purified and isolated to obtain pure aspirin.
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A Milliliter-Scale Setup for the Efficient Characterization of Multicomponent Vapor-Liquid Equilibria Using Raman Spectroscopy
Vapor-liquid equilibrium (VLE) data are of major importance for the chemical industry.Despite significant progress in predictive methods, experimental VLE data are still indispensable.In this work, we address the need for experimental VLE data.Commonly, the characterization of VLE requires significant experimental effort.To limit the experimental effort, VLE measurements are frequently conducted by synthetic methods which employ samples of known composition and avoid complex analytics and sampling issues.In contrast, analytical methods provide independent information on phase compositions, commonly based on sampling and large amounts of substance. In the first part of this work, we employ a synthetic method, the well-established Cailletet setup, to characterize the high pressure VLE of two promising binary biofuel blends.The Cailletet method serves as a state of the art reference method that enables collecting data of remarkable accuracy.However, extensive infrastructure is needed. In the second part, to avoid extensive infrastructure and overcome limitations of previous methods, we develop a novel analytical milliliter-scale setup for the noninvasive and efficient characterization of VLE: RAMSPEQU (Raman Spectroscopic Phase Equilibrium Characterization).The novel setup saves substance and rapidly characterizes VLE.Sampling and its associated errors are avoided by analyzing phase compositions using Raman spectroscopy.Thereby, volumes of less than 3 ml are sufficient for reliable phase equilibrium measurements.To enable rapid data generation and save substance, we design an integrated workow combining Raman signal calibration and VLE measurement.As a result, RAMSPEQU gives access to up to 15 pT xy-data sets per workday.RAMSPEQU is successfully validated against pure component and binary VLE data from literature. However, mixtures with only two components rarely depict real industrial applications.As the number of experiments increases strongly with a rising number of components, the efficient RAMSPEQU setup seems particularly suited for multicomponent systems.In the third part of this work, we employ the RAMSPEQU setup for the characterization of a quaternary system and its binary subsystems. 22 ml and 105 ml of the binary and quaternary mixtures are sufficient for an extensive VLE characterization. The RAMSPEQU setup and its integrated workow enable the characterization of multicomponent VLE while saving significant amounts of substance and laboratory time.
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Nanotechnology for Hydrogen Production and Storage : Nanostructured Materials and Interfaces
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Nanotechnology-Enhanced Solid Materials : Design, Synthesis, Properties, Applications, and Perspectives
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Nonlinear Optics on Ferroic Materials
Nonlinear Optics on Ferroic Materials Covering the fruitful combination of nonlinear optics and ferroic materials!The use of nonlinear optics for the study of ferroics, that is, magnetically, electrically or otherwise spontaneously ordered and switchable materials has witnessed a remarkable development since its inception with the invention of the laser in the 1960s.This book on Nonlinear Optics on Ferroic Materials reviews and advances an overarching concept of ferroic order and its exploration by nonlinear-optical methods.In doing so, it brings together three fields of physics: symmetry, ferroic order, and nonlinear laser spectroscopy.It begins by introducing the fundamentals for each of these fields.The book then discusses how nonlinear optical studies help to reveal properties of ferroic materials that are often inaccessible with other methods.In this, consequent use is made of the unique degrees of freedom inherent to optical experiments.An excursion into the theoretical foundations of nonlinear optical processes in ferroics rounds off the discussion.The final part of the book explores classes of ferroic materials of primary interest.In particular, this covers multiferroics with magnetoelectric correlations and oxide-electronic heterostructures.An outlook towards materials exhibiting novel forms of ferroic states or correlated arrangements beyond ferroic order and the study these systems by nonlinear optics concludes the work.The book is aimed equally at experienced scientists and young researchers at the interface between condensed-matter physics and optics and with a taste for bold, innovative ideas.
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Why does acetylsalicylic acid (Aspirin) dissolve better in warm water?
Acetylsalicylic acid (Aspirin) dissolves better in warm water because the increase in temperature causes the water molecules to move faster and spread apart. This increased movement and spacing between water molecules allows for more interactions with the Aspirin molecules, facilitating the dissolution process. Additionally, the higher temperature can provide more energy to break the bonds holding the Aspirin molecules together, further aiding in their dissolution in water.
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What is the test for the purity of acetylsalicylic acid?
The test for the purity of acetylsalicylic acid involves using a method called high-performance liquid chromatography (HPLC). This method separates and analyzes the components of a mixture to determine the concentration of the target compound, in this case, acetylsalicylic acid. By comparing the peak area of the sample to a standard reference, the purity of the acetylsalicylic acid can be determined. This test is commonly used in pharmaceutical and chemical industries to ensure the quality and purity of acetylsaljsonic acid products.
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What is the reaction equation for the titration of acetylsalicylic acid with NaOH?
The reaction equation for the titration of acetylsalicylic acid (aspirin) with NaOH is as follows: C9H8O4 (acetylsalicylic acid) + NaOH → NaC9H7O4 (sodium acetylsalicylate) + H2O In this reaction, acetylsalicylic acid reacts with sodium hydroxide to form sodium acetylsalicylate and water. The balanced equation shows the stoichiometry of the reaction between the acid and the base.
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Where has photonics gone?
Photonics has advanced and expanded into various industries and applications, including telecommunications, healthcare, manufacturing, and defense. It has enabled the development of faster and more efficient communication systems, medical imaging technologies, high-precision manufacturing tools, and advanced military equipment. Photonics has also made significant contributions to renewable energy technologies, such as solar cells and LED lighting. Overall, photonics has become an integral part of modern technology and continues to drive innovation in a wide range of fields.
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