scholarly journals Local Pharmacological Effects of Tungstate on the Color-Pattern Determination of Butterfly Wings: A Possible Relationship Between the Eyespot and Parafocal Element

2009 ◽  
Vol 26 (11) ◽  
pp. 758-764 ◽  
Author(s):  
Bidur Dhungel ◽  
Joji M. Otaki
Keyword(s):  
Color Pattern ◽  
Pharmacological Effects ◽  
Butterfly Wings ◽  
Pattern Determination

scholarly journals Long-Range Effects of Wing Physical Damage and Distortion on Eyespot Color Patterns in the Hindwing of the Blue Pansy Butterfly Junonia orithya

Insects ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 195 ◽  
Author(s):  
Joji Otaki
Keyword(s):  
Long Range ◽  
Color Pattern ◽  
Color Patterns ◽  
Physical Damage ◽  
Damage Site ◽  
Disk Size ◽  
Close Proximity ◽  
Butterfly Wings ◽  
Pattern Determination ◽  
Background Area

Butterfly eyespot color patterns have been studied using several different approaches, including applications of physical damage to the forewing. Here, damage and distortion experiments were performed, focusing on the hindwing eyespots of the blue pansy butterfly Junonia orithya. Physical puncture damage with a needle at the center of the eyespot reduced the eyespot size. Damage at the eyespot outer rings not only deformed the entire eyespot, but also diminished the eyespot core disk size, despite the distance from the damage site to the core disk. When damage was inflicted near the eyespot, the eyespot was drawn toward the damage site. The induction of an ectopic eyespot-like structure and its fusion with the innate eyespots were observed when damage was inflicted in the background area. When a small stainless ball was placed in close proximity to the eyespot using the forewing-lift method, the eyespot deformed toward the ball. Taken together, physical damage and distortion elicited long-range inhibitory, drawing (attracting), and inducing effects, suggesting that the innate and induced morphogenic signals travel long distances and interact with each other. These results are consistent with the distortion hypothesis, positing that physical distortions of wing tissue contribute to color pattern determination in butterfly wings.

scholarly journals Liquid Phase and Microwave-Assisted Extractions for Multicomponent Phenolic Pattern Determination of Five Romanian Galium Species Coupled with Bioassays

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1226 ◽  
Author(s):  
Andrei Mocan ◽  
Alina Diuzheva ◽  
Sabin Bădărău ◽  
Cadmiel Moldovan ◽  
Vasil Andruch ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Iridoid Glycosides ◽  
Deep Eutectic Solvent ◽  
Inhibitory Effect ◽  
Total Phenolic ◽  
Extraction Solvent ◽  
Microwave Assisted ◽  
Pattern Determination ◽  
Natural Deep Eutectic Solvent

Background: Galium is a plant rich in iridoid glycosides, flavonoids, anthraquinones, and small amounts of essential oils and vitamin C. Recent works showed the antibacterial, antifungal, antiparasitic, and antioxidant activity of this plant genus. Methods: For the determination of the multicomponent phenolic pattern, liquid phase microextraction procedures were applied, combined with HPLC-PDA instrument configuration in five Galium species aerial parts (G. verum, G. album, G. rivale, G. pseudoaristatum, and G. purpureum). Dispersive Liquid–Liquid MicroExtraction (DLLME) with NaCl and NAtural Deep Eutectic Solvent (NADES) medium and Ultrasound-Assisted (UA)-DLLME with β-cyclodextrin medium were optimized. Results: The optimal DLLME conditions were found to be: 10 mg of the sample, 10% NaCl, 15% NADES or 1% β-cyclodextrin as extraction solvent—400 μL of ethyl acetate as dispersive solvent—300 μL of ethanol, vortex time—30 s, extraction time—1 min, centrifugation at 12000× g for 5 min. Conclusions: These results were compared with microwave-assisted extraction procedures. G. purpureum and G. verum extracts showed the highest total phenolic and flavonoid content, respectively. The most potent extract in terms of antioxidant capacity was obtained from G. purpureum, whereas the extract obtained from G. album exhibited the strongest inhibitory effect against tyrosinase.

Detection and substitution-pattern determination of guanidines

1976 ◽  
Vol 32 (3) ◽  
pp. 284-285
Author(s):  
Renée A. Corral ◽  
O. O. Orazi ◽  
María E. González
Keyword(s):  
Substitution Pattern ◽  
Pattern Determination

scholarly journals Development of UV-spectrophotometry Method of the Quantitative Determination of a New Substance Quinazoline-4(3h)-on Derivate

2020 ◽  
Vol 9 (1) ◽  
pp. 30-34
Author(s):  
E. S. Mishchenko ◽  
A. D. Lazaryan ◽  
T. T. Lihota
Keyword(s):  
Quantitative Determination ◽  
Active Substance ◽  
Research Work ◽  
Biologically Active ◽  
Uv Spectrophotometry ◽  
Pharmacological Effects ◽  
Specific Absorption ◽  
Biologically Active Substance ◽  
Effective Remedy

Introduction. The aim idea of this research article is a development of the quantitative determination of a biologically active substance quinazolin4(3H)-on derivate with laboratory cypher «VMA-10-182, by UV-spectrophotometry with followed validation. The substance is an effective remedy that combines several pharmacological effects, like an antidepressant, anxiolytic and nootropic. As a result of preclinical trials, the research compound has proven to be an effective remedy in the fight and prevention of acute cerebrovascular accident (stroke). The substance realized pharmacological effects by stimulating the production of nitric oxide by the endothelial cells of the brain. As aresult of stimulating is a vasodilation of the vessels and improvement of blood flow in the ischemic part of the vessels occur. Therefore, for introducing the biologically active substance into medical practice we need to develop ways to control the quality of substance.Aim. The objective of this research work is to develop a method of the quantitative determination of a biologically active substance, derivative quinazolin-4(3H)-on (laboratory sypher – VMA-10-18), by method of UV spectrophotometry. The results of the research work were validated.Materials and methods. In this research we used a substance VMA-10-18 wich was previously purified from the initial and intermediate products of the synthesis. This substance is a white crystalline powder, odorless, hygroscopic.Results and discussion. The quantitative content of the active substance derived quinazolin-4(3H)-on has been determined. The specific absorption rate was calculated, followed by statistical processing of the results. The validation was carried out according to the «Specificity», «Linearity», «Accuracy», «Repeatability». The results indicate the effectiveness of the developed methodology and experimental reproducibility.Conclusion. Researches of physicochemical properties show al us use 95 % ethanol as a solvent. As a result we developed a method for the quantitative determination of the substance which can be proposed for inclusion in the normative documents. The quantitative determination of the active substance in the test substance was established, and the specific absorption index was calculated. All information are statistically processed and meet the requirements of regulatory documentation.

scholarly journals Binding Pattern Determination Of Class of Antifungal Drugs

2010 ◽  
Author(s):  
Arpit Tandon ◽  
Arpit Tandon ◽  
A Naqvi ◽  
Nitin Chitranshi ◽  
Siddharth Sinha
Keyword(s):  
Antifungal Drugs ◽  
Binding Pattern ◽  
Pattern Determination
Sign in / Sign up

Export Citation Format

Share Document