Pharmacognostic Identification of the Green Peel of Juglans mandshurica Maxim. from Different Regions and Harvest Times

Abstract Background: The green peel of Juglans mandshurica Maxim. (QLY) can be used as medicine, also known as Qinglongyi[1]. The aim of this study was to identify QLY from the different regions and harvest times by pharmacognostic identification.Methods: In this study, the morphological character, microscopic character and juglone’s content of QLY from different regions and harvest times were compared by morphological identification, paraffin section and powder section, physico-chemical identification and High Performance Liquid Chromatography (HPLC).Results: Morphological identification results that the colour of outer surfaces of peels which harvested from Tangyuan county of Heilongjiang Province in July, August and September are respectively yellow brown, tan and black brown , and the color of the solution graded gradually from light brown yellow to brownish black by water-based test (WBT). The colour of outer surfaces of peels which harvested from Changbai county of Jilin Province in July, August and September are respectively yellowish white, brownish yellow and pale brown, and the color of the solution gradually changed from light brown to dark brown by WBT. As well as the colour of outer surfaces of peels which harvested from Qingyuan county of Liaoning Province in July, August and respectively September are Light yellowish green, light brownish green and brown green, and the color of the solution gradually changed from light green to dark brown by WBT. With the increase of growth period, the number of microscopic characteristics of different Qinglongyi increased. Through physico-chemical identification, it was found that the yield of juglone in QLY picked on September 21, 2016 was the highest, and the content of juglone, whose order was Heilongjiang > Jilin > Liaoning, was as high as 203.476 μg/g.Conclusions: Through comparison, it is concluded that Heilongjiang Province is one of the high-quality producing areas of QLY, and its best harvest time is in the middle and first ten-day period of September to harvest QLY without softening, yellowing and decay. This experiment provides a theoretical basis for the determination of the best harvest conditions in QLY and the establishment of identification standards for medicinal materials.

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Electrochemical Deposition of Polypyrrole Nanostructures for Energy Applications: A Review

Current Nanoscience ◽

10.2174/1573413715666190717113600 ◽

2020 ◽

Vol 16 (4) ◽

pp. 462-477 ◽

Cited By ~ 2

Author(s):

Patrizia Bocchetta ◽

Domenico Frattini ◽

Miriana Tagliente ◽

Filippo Selleri

Keyword(s):

Lithium Batteries ◽

High Performance ◽

Relevant Literature ◽

Chemical Parameters ◽

Energy Devices ◽

Energy Applications ◽

Physico Chemical ◽

Potential Applications ◽

Template Free ◽

Cathodic Polymerization

By collecting and analyzing relevant literature results, we demonstrate that the nanostructuring of polypyrrole (PPy) electrodes is a crucial strategy to achieve high performance and stability in energy devices such as fuel cells, lithium batteries and supercapacitors. In this critic and comprehensive review, we focus the attention on the electrochemical methods for deposition of PPy, nanostructures and potential applications, by analyzing the effect of different physico-chemical parameters, electro-oxidative conditions including template-based or template-free depositions and cathodic polymerization. Diverse interfaces and morphologies of polymer nanodeposits are also discussed.

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Preparation and Photocatalytic Activity of Mixed Phase Anatase/rutile TiO2 Nanoparticles for Phenol Degradation

Jurnal Teknologi ◽

10.11113/jt.v70.3437 ◽

2014 ◽

Vol 70 (2) ◽

Author(s):

Mohamad Azuwa Mohamed ◽

Wan Norharyati Wan Salleh ◽

Juhana Jaafar ◽

Norhaniza Yusof

Keyword(s):

Photocatalytic Activity ◽

Tio2 Nanoparticles ◽

High Performance ◽

Sol Gel ◽

Phenol Degradation ◽

Chemical Properties ◽

Mixed Phase ◽

Rutile Tio2 ◽

Physico Chemical ◽

Degussa P25

The evolution of desirable physico-chemical properties in high performance photocatalyst materials involves steps that must be carefully designed, controlled, and optimized. This study investigated the role of key parameter in the preparation and photocatalytic activity analysis of the mixed phase of anatase/rutile TiO2 nanoparticles, prepared via sol-gel method containing titanium-n-butoxide Ti(OBu)4 as a precursor material, nitric acid as catalyst, and isopropanol as solvent. The prepared TiO2 nanoparticles were characterized by means of XRD, SEM, and BET analyses, and UV-Vis-NIR spectroscopy. The results indicated that the calcination temperature play an important role in the physico-chemical properties and photocatalytic activity of the resulting TiO2 nanoparticles. Different calcination temperatures would result in different composition of anatase and rutile. The photocatalytic activity of the prepared mixed phase of anatase/rutile TiO2 nanoparticles was measured by photodegradation of 50 ppm phenol in an aqueous solution. The commercial anatase from Sigma-Aldrich and Degussa P25 were used for comparison purpose. The mixed phase of anatase/rutile TiO2 nanoparticles (consists of 38.3% anatase and 61.7% rutile) that was prepared at 400°C exhibited the highest photocatalytic activity of 84.88% degradation of phenol. The result was comparable with photocatalytic activity demonstrated by Degussa P25 by 1.54% difference in phenol degradation. The results also suggested that the mixed phase of anatase/rutile TiO2 nanoparticles is a promising candidate for the phenol degradation process. The high performance of photocatalyst materials may be obtained by adopting a judicious combination of anatase/rutile and optimized calcination conditions.

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Control of Barrier Width in Perovskite Multiple Quantum Wells for High Performance Green Light–Emitting Diodes

Advanced Optical Materials ◽

10.1002/adom.201801575 ◽

2018 ◽

Vol 7 (3) ◽

pp. 1801575 ◽

Cited By ~ 15

Author(s):

Maotao Yu ◽

Chang Yi ◽

Nana Wang ◽

Liangdong Zhang ◽

Renmeng Zou ◽

...

Keyword(s):

Quantum Wells ◽

High Performance ◽

Light Emitting Diodes ◽

Green Light ◽

Multiple Quantum Wells ◽

Multiple Quantum ◽

Barrier Width ◽

Light Emitting

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Operando direct observation of spin-states and charge-trappings of blue light-emitting-diode materials in thin-film devices

Scientific Reports ◽

10.1038/s41598-020-75668-4 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Fumiya Osawa ◽

Kazuhiro Marumoto

Keyword(s):

Blue Light ◽

High Performance ◽

Density Functional ◽

Light Emitting Diode ◽

Green Light ◽

Spin States ◽

Light Emitting ◽

Full Color ◽

Color Displays ◽

Materials Used

Abstract Spin-states and charge-trappings in blue organic light-emitting diodes (OLEDs) are important issues for developing high-device-performance application such as full-color displays and white illumination. However, they have not yet been completely clarified because of the lack of a study from a microscopic viewpoint. Here, we report operando electron spin resonance (ESR) spectroscopy to investigate the spin-states and charge-trappings in organic semiconductor materials used for blue OLEDs such as a blue light-emitting material 1-bis(2-naphthyl)anthracene (ADN) using metal–insulator–semiconductor (MIS) diodes, hole or electron only devices, and blue OLEDs from the microscopic viewpoint. We have clarified spin-states of electrically accumulated holes and electrons and their charge-trappings in the MIS diodes at the molecular level by directly observing their electrically-induced ESR signals; the spin-states are well reproduced by density functional theory. In contrast to a green light-emitting material, the ADN radical anions largely accumulate in the film, which will cause the large degradation of the molecule and devices. The result will give deeper understanding of blue OLEDs and be useful for developing high-performance and durable devices.

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High performance thin layer chromatography fingerprinting, phytochemical and physico-chemical studies of anti-diabetic herbal extracts

AYU (An International Quarterly Journal of Research in Ayurveda) ◽

10.4103/0974-8520.175546 ◽

2015 ◽

Vol 36 (2) ◽

pp. 188 ◽

Cited By ~ 1

Author(s):

PrakashR Itankar ◽

DattatrayB Sawant ◽

Mohd. Tauqeer ◽

SonalS Charde

Keyword(s):

Thin Layer ◽

Thin Layer Chromatography ◽

High Performance ◽

Herbal Extracts ◽

Physico Chemical ◽

Chemical Studies ◽

Layer Chromatography

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Comparative Study of Physico-Chemical Properties of Pure Polyurethane and Polyurethane Based on Castor Oil

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.983.39 ◽

2014 ◽

Vol 983 ◽

pp. 39-43

Author(s):

M. A. Alaa ◽

Kamal Yusoh ◽

S.F. Hasany

Keyword(s):

Castor Oil ◽

High Performance ◽

In Situ Polymerization ◽

Chemical Properties ◽

Strength Properties ◽

Hydroxyl Group ◽

Physico Chemical ◽

Analysis Technique ◽

Hydrophobic Nature ◽

Poly Propylene

Petroleum based polyurethanes are contributing major portions in the world requirement. To overcome the environmental issues and price adaptability, there is always a massive demand of utilization of renewable resources for polyurethane synthesis with comparable physico-chemical properties. Castor oil is the only major natural vegetable oil that contains a hydroxyl group (-OH) and unsaturated double bonds (C=C) in its organic chain and therefore can be employed with or without modification due to the excellent properties derived from the hydrophobic nature of triglycerides. In this study, physico-chemical properties of high performance polyurethane synthesized from Poly propylene glycol (PPG) in comparison with a combination of PPG and Castor oil (a renewable source), by in situ polymerization technique has been studied. The variations in properties of both types of polyurethanes are evaluated by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Thermogravimetric analysis technique (TGA). Tensile strength properties were investigated by Film Tensile testing equipment. Results indicated the presence of large-CH stretching in castor oil mixed polyurethane with a larger oxidative thermal stability, over a pure PPG polyurethanes. Tensile properties were found almost comparable in pure and mixed polymers, which signify the usage of mixed polymer in coming future, to overcome the environmental and economical crisis in polyurethanes synthesis.

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Predicting Physiological Growth Period based on Cumulative Climatic Suitability of Spring Maize

Austin Food Sciences ◽

10.26420/austinfoodsci.2021.1045 ◽

2021 ◽

Vol 6 (1) ◽

Author(s):

Zhou B ◽

◽

Zhang Y ◽

Li J ◽

Wang T ◽

...

Keyword(s):

Growth Stage ◽

Reference Value ◽

Growth Period ◽

Absolute Error ◽

Weight Coefficient ◽

Liaoning Province ◽

Observation Data ◽

Climatic Suitability ◽

Spring Maize ◽

Physiological Stage

The growth period prediction at the various physiological stage of spring maize is an essential component in agricultural management decisions. An Improved Climate Suitability (ICS) model was established by integrating temperature, precipitation, sunshine and soil moisture and setting individual weight coefficient in each subordinate function according to the observation data of spring maize growth and meteorological factors of 14 agrometeorological stations in the Liaoning Province of northeast China from 1981 to 2010. The predicted value (Bjk) and reference value (Bk) of the cumulative climatic suitability index were calculated by the ICS model for arranging farming activities in advance when the Bjk > Bk at the various physiological growth stage of spring maize. The ICS model was further verified by the observation data at the whole and various physiological stages of spring maize. The result showed that the Bjk was linearly correlated with the observed days at each physiological growth stage of spring maize with R² of 0.75-0.88, P<0.001, Thus, the Bjk can be used to determine the growth period of the various physiological stage of spring maize. The prediction days were significantly correlated with the observed days at the whole and each physiological growth stage of spring maize (R² of 0.57-0.98, P<0.001) with the absolute error (ABSE) of 1.1-4.1 d. Thus, the precision of the ICS model is acceptable for forecasting the growth period and arranging farming activities in advance. Thus, the ICS model should be promoted further in the management of spring maize plantation.

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