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Compare and contrast essays are a common type of academic writing in which a student is asked to identify and analyze the similarities and differences between two or more subjects. These types of essays can be used to examine a wide range of topics, from historical events and political ideologies to scientific concepts and artistic movements. Some possible compare and contrast topics might include:
Political systems: This could include comparing and contrasting different forms of government, such as democracy and autocracy, or different political ideologies, such as conservatism and liberalism.
Historical events: Students could compare and contrast major events in history, such as the American Revolution and the French Revolution, or the world wars of the 20th century.
Scientific concepts: Students could compare and contrast different scientific theories or discoveries, such as the theories of evolution and intelligent design, or the laws of thermodynamics and gravity.
Artistic movements: Students could compare and contrast different artistic styles or movements, such as impressionism and expressionism in painting, or classical and romantic music.
Technology: Students could compare and contrast different technological innovations, such as the personal computer and the smartphone, or online and traditional education.
Regardless of the specific topic being addressed, a compare and contrast essay should begin with a clear introduction that identifies the two subjects being compared and the purpose of the comparison. The body of the essay should then present a series of points of comparison and contrast, using specific examples to support each point. Finally, the essay should conclude with a summary of the main points of comparison and contrast and a discussion of the implications or significance of those differences.
Eugenol
In the encapsulation process, unmodified cellulose was dissolved in 7% aqueous NaOH at low temperature, regenerated to form a dispersion of cellulose hydrogels, which was rigorously mixed with the EOs by mechanical mixing followed by high-pressure homogenization HPH. Preparation of Thymus vulgaris Essential Oil Microcapsules by Complex Coacervation and Direct Emulsion: Synthesis, Characterization and Controlled Release Properties. Wait until substance reaches room temperature and add 2 mL of ether. Two cellulose:EO ratios were investigated: 1:8 and 1:1. The main differences are that the O-H stretch is no longer present in the eugenol benzoate IR.
Upgradation of Eugenol to ASTM D 1655 standard Bio
The single arrow in A points to cellulose network in the background, the outer andinner pointing double arrows indicate the capsule inner diameter and inner shell thickness, respectively, and the dashed arrows point the outer shell thickness. Funding We acknowledge support of the Israel Innovation Authority, SMART MAGNET consortium. Encapsulation of Thymol and Eugenol Essential Oils Using Unmodified Cellulose: Preparation and Characterization. Extraction of thymol from different varieties of thyme plants using green solvents. Add 1 mL of water to test tube and add 5% aqueous KOH until oil dissolves. The frozen droplets are transferred to a BAF060 Leica Microsystems, Wetzlar, Germany freeze fracture system, where they were fractured by a rapid stroke of a cooled knife, exposing the inner part of the drop. Polymers 2019, 11, 1570.
These results carry possible applicative potential as eco-friendly crop-protecting agents, in particular as anti-fungal agents in post-harvest hay. A fractional replacement of Ruthenium Ru by another transition metal Nickel Ni , is a potentially effective method. The emulsions proved stable, at both cellulose:EO ratios. In addition, add 25 mL of CH2Cl2 and separate two layers into separate flasks. However, they are vulnerable to heat and light, limiting their range of applications.
Cellulosic nanorods of various aspect ratios for oil in water Pickering emulsions. The eugenol benzoate obtained should effectively characterize the eugenol isolated. Eugenol is the main product produced from the reagents in part one of the experiment. Deionized water was used in this work. Collect the crystals formed and allow for them to dry. The emulsions exhibited anti-mold activity in post-harvest alfalfa plants, with potency affected by the cellulose:EO ratio as well as the EO type; TY showed the highest anti-mold activity. Essential oils EOs are complex mixtures of volatile compounds formed by aromatic plants as secondary metabolites and characterized by strong odors.
Molecules 2020, 25, 5878. Extraction is an experimental technique used in the separation of the oil and eugenol. The Feature Paper can be either an original research article, a substantial novel research study that often involves several techniques or approaches, or a comprehensive review paper with concise and precise updates on the latest progress in the field that systematically reviews the most exciting advances in scientific literature. Based on the results, the experimental eugenol obtained from the ground cloves appears to have not been contaminated by any other substances since the peaks are pretty much the same everywhere else on each of the spectrums. Similarly, bands characteristic of EU were clearly seen in the two emulsions containing this EO 3.
Thus, not all of the oil from the ground cloves was obtained causing for the recovery yield to be 38. Eugenol PowerPoint Vista 5. The single arrows in A, C point to the cellulose network in the background. Recent progress in Pickering emulsions stabilised by bioderived particles. Lipase Catalyzed Transesterification of Model Long-Chain Molecules in Double-Shell Cellulose-Coated Oil-in-Water Emulsion Particles as Microbioreactors. New pickering emulsions stabilized by bacterial cellulose nanocrystals.
Steam distillation allows mixtures of organic substances to distill and form a compound known as a distillate. PLoS ONE 2015, 10, e0119564. Cellulose acetate—essential oil nanocapsules with antimicrobial activity for biomedical applications. Soft Matter 2013, 9, 952—959. Spectroscopic Investigation of Syzygium aromaticum L. Encapsulation of babchi essential oil into microsponges: Physicochemical properties, cytotoxic evaluation and anti-microbial activity. They were then transferred to the pre-cooled HR-SEM and imaged as described above.
Polysaccharides 2021, 2, 608—625. Eugenol was effectively isolated from the oil obtained from the steam distillation. Images were recorded and analyzed with Stream Essentials software Olympus Scientic Solutions, Evident Corp. . The single arrow points to the cellulose hydrogel particles in the background and the asterisks mark the cellulose network at the inner shell side after the EO core was detached during specimen fracture. The main product of the reaction between eugenol and benzoyl chloride is eugenol benzoate. The hierarchical Zeolite composite catalysts were synthesized by a wet-chemistry method.
Evaluation of lemongrass, thyme and peracetic acid against gray mold of strawberry fruits. Preparation of Eugenol Benzoate Vista Handout 2. Put into an Erlenmeyer flask and cover the top with aluminum foil with some wholes for next week. The purpose of the experiment is to obtain a solid derivative known as eugenol benzoate to find the melting point and analyze the solid forms IR spectrum as well. Light microscopy, high-resolution cryogenic scanning electron microscopy cryo-SEM and Fourier transform infrared spectroscopy FTIR revealed successful fabrication of EO-loaded capsules in size range of 1 to ~8 µm.
