Hair Design with Natural Motifs Using Pantone Colors

In this study, natural motifs were extracted based on the trend colors selected by Pantone in 2018-2021, and the image was shaped to produce hair design works that reflected the trend colors. In Artwork I, the ultra violet color has a wisteria motif, and the hair color is expressed using the ombré technique. Artwork II Living Coral color has a coral reef in the sea as a motif, and the hair color is expressed in a two-tone technique. Artwork III Classic blue color has a blue zebra-patterned seashell as a motif, and hair color is expressed using weaving and balayage techniques. Artwork IV Illuminating and Ultimate Gray color are inspired by autumn birch trees, and hair color is expressed using weaving and two-tone techniques. In this way, it was confirmed that creative and diverse design expressions are possible by completing trendy hairstyles with various techniques by incorporating each Pantone color into nature.

Ceratozamia dominguezii (Zamiaceae): A New Cycad Species from Southeastern Mexico

Ceratozamia dominguezii (Zamiaceae), a new species endemic to the lowland karstic tropical rainforests of southeastern Veracruz, Mexico, is described. The new species is part of the C. robusta species complex, a group of closely related species that share unique characteristics in the genus, such as robust trunks, large strobili, and long leaves. Compared with the other species in the complex (i.e., C. robusta, C. leptoceras, C. aurantiaca and C. subroseophylla), C. dominguezii has the longest rachides, and is characterized by having papyraceous leaflets, a unique caramel color in emerging leaves, and a dark-violet color in the central portion of distal faces of male and female sporophylls. Ceratozamia dominguezii occurs within the Uxpanapa floristic refuge, which is hypothesized to have sheltered a numerous group of tropical elements during the Neogene glaciations. The recognition of C. dominguezii contributes to clarifying the present diversity of cycads in the genus Ceratozamia, and adds discussion on the role of floristic refugia in the divergence of Neotropical plants in Mexico.

Synthesis and Physical Properties of New Violet Color Filter Dye for Image Sensors

New violet colorant, XPDIA was synthesized by using Acid Red 52 to develop a high-performance image sensor. Solubility of XPDIA was more than 5 wt% in PGMEA which is the main solvent in the color filter preparation process. △Eab value of XPDIA showed a very low color difference of 2.17 after thermal treatment. In solvent resistance, transmittance was not changed and △Eab showed a low color difference of 1.55 before and after solvent dipping. As a result of the migration test, there was no change at all after dipping in the PGMEA transmittance spectrum. The newly synthesized violet colorant, XPDIA exhibited excellent thermal-chemical stability, and good solubility and it can be applied to image sensor color filter application.

Dioxazine pigments

This chapter provides an overview of the structural and synthetic chemistry, and the industrial applications, of dioxazine pigments, a small group of high performance organic pigments. The color violet (or purple) has frequently assumed a prominent position in history, on account of its rarity and cost. The natural colorant Tyrian purple and the first synthetic textile dye, Mauveine, are prime examples of this unique historical feature. CI Pigment Violet 23, also referred to as Dioxazine Violet or Carbazole Violet, is one of the most universally used organic pigments, by far the most important industrial pigment in the violet shade area. Dioxazine Violet is also unique as the dominant industrial violet pigment providing a brilliant, intense violet color and an excellent all-round set of fastness properties. The pigment has a polycyclic molecular structure, originally described wrongly as a linear arrangement, and later shown to adopt an S-shaped arrangement on the basis of X-ray structural analysis. Two other dioxazine pigments are of rather lesser importance. The synthesis and manufacturing route to CI Pigment Violet 23 is described in the review. Finally, a survey of the principal current applications of the individual dioxazine pigments is presented.

Unusual metasomatites (phyolithites) in the Kolvitskiy gabbro-anorthosite rock mass: composition and structural position

Complex mineralogical, geochemical, and geological-structural characteristics of a rare collection stone of violet color, phyolithite, in the southwestern part of the Kola Peninsula. This is a metasomatic rock formed under the conditions of brittle deformations on gabbro-anorthosites of the Paleoproterozoic Kolvitskiy rock mass. As a result of potassium metasomatosis, the plagioclase of the initial rocks was replaced by a fine-grained mica aggregate of muscovite-phengite composition with inclusions of Va-aluminoseladonite (up to 20-30 microns). Ba-aluminoseladonite contains 6.6-10.5 % by weight of BaO. Manganese is the only chromophore that accumulates in the rock during metasomatosis. It is manganese that provides the purple-violet color of pseudomorphs of mica according to anorthite. The phyolithites is depleted by REE and has a positive Eu-anomaly. The phyolithites are confined to the areas of fracturing of the north-eastern strike, located in the zone of dynamic influence of the north-western closure of the Onega-Kandalaksha rift of the Riphean age. Other formations (injection conglomerates and lamproites) are also associated with the formation of this structure, which owe their origin to an intense fluid flow.

Green and Quick Extraction of Stable Biophenol-Rich Red Extracts from Grape Processing Waste

The extraction of grape processing waste (wine pomace) via microwave-hydrodiffusion and gravity (MHG) from three different cultivars grown in Sicily (Syrah, Perricone and Nero d’Avola) rapidly affords aqueous extracts highly concentrated in valued biophenols including flavonoids, anthocyanins and phenolic acids. The method does not employ organic solvent, acid or base and does not require grinding or freeze drying of the wine pomace nor separation of the grape skins from seeds and stem. All the extracts have a pronounced stability as shown by their red-violet color fully retained after storage for more than a year (15 months) in freezer under air. Concentrations of phenolics up to 2000 ppm were detected in the aged extracts of Sicily’s local cultivar Perricone, which also has the highest content of flavonoids. These findings provide a simple and economically viable extraction route to biophenol-rich red extracts that can be used as food colorants as well as to formulate nutraceutical, cosmetic and personal care products starting from an agricultural by-product available in >10 million tonne yearly amount.

Sistemas de fotoativação e seus impactos nas restaurações em resina composta: uma revisão de literatura

Photoinitiating substances and photoactivation devices are directly conected to the physical-mechanical and chemical performance of the composite resins. Due to the yellowish coloration from camphorquinone (CQ), alternative photoinitiators have been used in a complementary or substitute way. Thus, the objective of the study was to develop a literature review on photoinitiators in correlation with photoactivation and its impacts on composite resin restorations. The literature review has been conducted based on researches in the Scielo, PubMed and Google Scholar databases through the descriptors: composite resins, polymerization and photoinitiators. In the search carried out between March and June 2020, of the forty-two articles found, thirty-seven articles were used. Among the variations of the photoinitiator systems, it's been observed that in general, they presented positive points such as good physical-mechanical and chemical performance with the evaluation of the degree of conversion, flexural strength and microhardness. They also presented negative points such as high toxicity, gap formation and unsatisfactory indices of microleakage in dentin. In relation to photoactivation systems, light emitting diodes (LEDs), called polywave, brought advantages by emitting a larger wave spectrum that reaches the violet color, necessary to activate the polymerization chemical reaction of the alternative photoinitiators. It can be concluded that the emergence of new photoinitiating substances and polywave devices establish a certain harmony with the light supply capacity, the reaction of the substances and the reach of the physical-mechanical properties provided by them.

Synthesis of Novel Manganese Aluminum Phosphate Violet Pigments

Novel violet pigments were synthesized from manganese oxide, aluminum hydroxide, and phosphoric acid by heating at several temperatures. The obtained materials were investigated by X-ray diffraction (XRD) analysis, infrared (IR) spectroscopy, ultraviolet–visible (UV–Vis) reflectance spectroscopy, and L*a*b* color space. Sample synthesized in this work showed no clear peak pattern on XRD analysis. At Mn/Al/P = 1/1/4, sample heated at 400 ° C showed the most violet color. The effect of heating time was small. In addition, the increasing the manganese ratio darkened the sample. Further, we examined the improvement of blue and red by replacing with copper and iron. The blue tint was improved by adding a small amount of copper. On the other hand, a high proportion of iron lost the violet color.

Synthesis of 1,5-diphenylcarbazide-immobilized alginate/pectin films for colorimetric detection of Cr(VI)

<p>An optical sensor for colorimetric detection of Cr(VI) has been synthesized by immobilizing 1,5-diphenylcarbazide (DPC) into alginate/pectin films. The addition of cationic surfactant (CTAB) was used to increase the effectiveness of DPC immobilization by forming hydrophobic-ion pairs. At optimum condition, the films has good selectivity for Cr(VI) compare to other interference metals. The formation of violet color in the films showed its potential application for visual colorimetric detection of Cr(VI). The developed films in this study was found to be simple, rapid and sensitive sensor for direct determination of Cr(VI) with detection limit as low as 0.233 mg L–1 and time response was 8 minutes.</p>

An Extractive Spectrophotometric Method for the Determination of Pymetrozine in Various Ecological Samples of Bilaspur District (C.G.)

Pesticides are designated mixture of substances for extenuating and destroying any group of pests such as insects and vegetation. Pymetrozine [6-methyl-4-[(E)-pyridin-3-ylmethylideneamino]-2, 5-dihydro-1, 2, 4-triazin-3-one] is a pyridine azomethine compound which represents a class of insecticide. A Spectrophotometric method has been developed on the modified Fujiwara reaction for the determination of pymetrozine. Pymetrozine directly reacts with chloroform the 45-500C turns out the violet color in the formation of Schiff’s Base (Glutaconic Aldehyde). In the present reaction, the violet color obtained is discharged with a few drops of acetic acid followed by the addition of p- nitro aniline reagent which gives yellow color dyes. The absorption maxima of yellow-colored dye measured at 430 nm. Beer’s law is obeyed over the range of 1 to 10 µg per 10 ml of pymetrozine. The molar absorptivity of the colored system is 1.38×105 L mol-1 and Sandall’s sensitivity is 1.0×10-3µg cm-2. This method is free from the interference of other interfering and can be successfully applied for the determination of various ecological samples.