scholarly journals Preparation of red elemental nanoselenium by Arabic gum template method

2021 ◽  
Vol 267 ◽  
pp. 02014
Author(s):  
Qingbing Guo ◽  
Xuegui Lin ◽  
Ming He ◽  
Guojie Wu
Keyword(s):  
Particle Size ◽  
Mass Fraction ◽  
Orthogonal Experiment ◽  
Nanometer Scale ◽  
Process Conditions ◽  
Elemental Selenium ◽  
Optimal Process ◽  
Size Change ◽  
Arabic Gum ◽  
Particle Size Analyzer

Red elemental nanoselenium was prepared by reducing sodium selenite with ascorbic acid using Arabic resin as template in this study. The factors effecting on the particle size change of nanoselenium such as reaction time, reactant concentration, template mass fraction and reaction temperature were studied. The orthogonal experiment L9(34) was designed to determine the optimal process conditions. The elemental nanoselenium was characterized by IR and particle size analyzer. The results showed that the stable red elemental selenium with nanometer scale was prepared.

scholarly journals Study on Aqueous Enzymatic Extraction Process of Common Pistache Oil

2021 ◽  
Vol 251 ◽  
pp. 02058
Author(s):  
Feng Xuehua ◽  
Tao Ali ◽  
Song Zurong ◽  
Gong Panpan
Keyword(s):  
Ph Value ◽  
Orthogonal Experiment ◽  
Extraction Process ◽  
Optimal Time ◽  
Process Conditions ◽  
Optimal Process ◽  
Enzymatic Extraction ◽  
Hydrolysis Time ◽  
Aqueous Enzymatic Extraction ◽  
The Common

The aqueous enzymatic method was applied to extract the common pistache oil and the optimal extraction process conditions were identified. By observing the effect of enzymatic hydrolysis time, pH value, temperature on aqueous enzymatic extraction process and performing the orthogonal experiment based on the single factor test, the optimal process parameters were obtained, namely, the optimal time, temperature, and pH value were respectively 3 h, 50℃, and 7 with a final extraction rate of 25.38 %.

Process Parameters Optimization of Direct Synthesis Nano Magnesium Fluoride Powders

2012 ◽  
Vol 184-185 ◽  
pp. 1146-1149
Author(s):  
Ping Li ◽  
Hai Yang Wang ◽  
Wan E Wu ◽  
Shuai Ling
Keyword(s):  
Particle Size ◽  
Orthogonal Experiment ◽  
Direct Synthesis ◽  
Average Particle Size ◽  
Parameters Optimization ◽  
Magnesium Fluoride ◽  
Process Conditions ◽  
Average Particle ◽  
X Ray ◽  
Mgcl2 Concentration

To reduce average particle size，magnesium fluoride was directly synthesized from MgF2 and NH4F，the product was characterized by X-ray diffractomer，scanning electron microscopy. Orthogonal experiment was used to explore the influences of factors on the average particle size. Found that the effect order of factors on the average particle size is MgCl2 concentration，NH4F concentration，reaction temperature，reaction time，in the optimization of process conditions，average particle size is 23.1 nm.

Application of Polycarboxylic Acid Anti-Crease Finishing Agent for Silk

2014 ◽  
Vol 936 ◽  
pp. 1605-1608 ◽  
Author(s):  
Lei Xu
Keyword(s):  
Magnesium Chloride ◽  
Orthogonal Experiment ◽  
High Strength ◽  
Process Conditions ◽  
Polycarboxylic Acid ◽  
Optimal Process ◽  
Finishing Process ◽  
Finishing Agent ◽  
Silk Fabrics ◽  
Strength Retention

Polycarboxylic acid anti-crease finishing agent is used to finish silk. The optimal finishing process was selected through orthogonal experiment. The optimal process conditions were as follows. The optimal concentration of both finishing agent Y and magnesium chloride was 100g/L. The optimal baking temperature and baking time were 160 °C and 3min, respectively. The results show that the silk fabrics treated by finishing agent Y had high strength retention and washing fastness. In addition, the effect of ant-crease finishing on the whiteness of fabrics was small.

Ammonia Sensing and Cytotoxicity of the Biosynthesized Silver Nanoparticle by Arabic Gum (AG)

2019 ◽  
Vol 13 (3) ◽  
pp. 228-238 ◽  
Author(s):  
Nahid Jalalian Elahi ◽  
Masoud Salehmoghadam ◽  
Danial Taherzadeh ◽  
Alireza Hashemzadeh ◽  
Majid Darroudi
Keyword(s):  
Particle Size ◽  
Ag Nps ◽  
Arabic Gum ◽  
Ammonia Sensing ◽  
Natural Polysaccharide ◽  
Particle Size Analyzer ◽  
A Cell ◽  
The Mean ◽  
Biosynthesized Agnps

Background: The green synthesizing procedure of Silver nanoparticles (AgNPs) has been performed through the usage of a natural polysaccharide; Arabic gum (AG) as a stabilizing/ capping agent. For characterization of AgNPs, TEM, particle size analyzer and UV-Vis were used. Methods: The aim of our project was to identify biosynthesized AgNPs for sensing ammonia and to explore its toxicity on Neuro-2A cells. We also reviewed the patents for biosynthesized AgNO3 and ammonia sensing. The optimal conditions for the synthesis of AgNPs in AG consist of utilizing (0.1g) AG in dH2O (70 ml), 10 ml of 1 mM silver solution and 0.1 mM (AA) at 70°C stirring for 30 minutes. The AgNPs cytotoxicity was evaluated on Neuro-2A cells; consequently, ammonia was sensed with the lowest possible concentration of 10-6. Results: Particle size analyzer displayed the mean diameter of about 70 nm for the sphericalshaped Ag-NPs. UV–Vis revealed that the prepared AgNPs were ammonia sensitive in solution as the concentration of ammonia was increased. The cytotoxicity of AgNPs indicated lower Cell viability at higher concentrations of the AG-capped AgNPs. Conclusion: By synthesis of AgNPs in GA by using AA, we successfully prepared a sensor to diagnose ammonia in a cell and sensing its level at concentrations of 10-6 M. In this study, no therapeutic application has been shown, but this method could be utilized industrially for therapeutic purposes in the future.

Research on Anti-Felting Finishing Process of Wool Knitted Fabric with Protease

2011 ◽  
Vol 383-390 ◽  
pp. 5492-5495 ◽  
Author(s):  
Hua E Wang
Keyword(s):  
Ph Value ◽  
Orthogonal Experiment ◽  
Acid Protease ◽  
Process Conditions ◽  
Knitted Fabric ◽  
Optimal Process ◽  
Technical Parameters ◽  
Finishing Process ◽  
Protease Treatment ◽  
Energy Saving Technology

In this paper, acid protease treatment was studied on anti-felting finishing of wool knitted fabric and the optimal process conditions were obtained by orthogonal experiment. The technical parameters were hydrogen peroxide concentration 40mL/L, temperature 45°C, time 45min, pH value 8, concentration of protease 5 % (owf), pH value 5, temperature 40°C and time 35min. Through this process, the felt resistance property of wool knitted fabric has been improved greatly. Because of low temperature, energy consumption, environmental pollution, this process belongs to environmental protection and energy saving technology.

Simulation of Vacuum Rotating Dryer to Dry Caffeine Colloid

2012 ◽  
Vol 560-561 ◽  
pp. 1159-1164
Author(s):  
Zhao You Zhu ◽  
Zhong Ze Lv ◽  
Ying Long Wang ◽  
Ying Liu
Keyword(s):  
Heating Temperature ◽  
Orthogonal Experiment ◽  
Process Conditions ◽  
Optimal Process ◽  
Laboratory Equipment ◽  
Drying Time ◽  
Vacuum Degree ◽  
Cooling Crystallization ◽  
Dry Conditions ◽  
Single Factor Experiment

It is time-consuming to dry the caffeine colloid got from caffeine methylation liquid after evaporating crystallization and cooling crystallization. To solve this problem, the laboratory equipment is designed to simulate vacuum rotating dryer to dry the caffeine colloid. Through the single-factor experiment and orthogonal experiment, the suitable dry conditions are determined as follows: the heating temperature is 110 °C; the vacuum degree is 0.09 MPa; the stirring speed is 250 rpm. The drying time under the optimal process conditions is reduced to 1.01hours.

SINTESIS DAN KARAKTERISASI NANOPARTIKEL KITOSAN – EKSTRAK KULIT BUAH MANGGIS (Garcinia Mangostana)

2013 ◽  
Vol 14 (3) ◽  
Author(s):  
Eriawan Rismana ◽  
Susi Kusumaningrum ◽  
Olivia Bunga P ◽  
Idah Rosidah ◽  
Marhamah Marhamah
Keyword(s):  
Particle Size ◽  
Sodium Tripolyphosphate ◽  
Chitosan Solution ◽  
The Other ◽  
Ionic Gelation ◽  
Garcinia Mangostana ◽  
Particle Size Analyzer ◽  
Cadmium Lead ◽  
Solvent Residue ◽  
Mold And Yeast

The chitosan – Garcinia Mangostana extract nanoparticles has been prepared by ionic gelation reaction by mixture 0.2 % chitosan solution in acetic acid with Garcinia Mangostana extract and it’s continued by reaction process with 0.1 % sodium tripolyphosphate. The particle size of material was determined by Particle Size Analyzer (PSA) that it showed in the range of 200 – 500 nm. The color, pH, water, α- mangostin, mercury, arsenic, cadmium, lead, totally microbe aerobic, totally mold and yeast, and solvent residue contents of nanoparticles were also examined by many methods that these resulted are yellow, 4.50 – 5.50, 89 – 90 %, 1.05 %, < 0.005 ppm, < 0.01 ppm, < 0.01 ppm, < 0.05 ppm, < 10 CFU/g, < 10 CFU/g and not detected, respectively. The other characterization was also observed that it’sincluded stability andTLC chromatogram. A mixture of nanoparticles with cosmetics bases was showed that it’s increased stability, homogeneity and easy to formed.

Physical and bacterial processes affecting suspended particulate matter in a tidal river

1998 ◽  
Vol 38 (6) ◽  
pp. 327-335
Author(s):  
Yasunori Kozuki ◽  
Yoshihiko Hosoi ◽  
Hitoshi Murakami ◽  
Katuhiro Kawamoto
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Suspended Particulate Matter ◽  
River Mouth ◽  
Tidal River ◽  
Natural Soil ◽  
Size Change ◽  
Run Off ◽  
Suspended Particulate ◽  
And Behavior

In order to clarify the origin and behavior of suspended particulate matter (SPM) in a tidal river, variation of SPM in a tidal river was investigated with regard to its size and constituents. SPM was separated into three groups according to size. Change of contents of titanium and organic substances of each group of SPM was examined. SPM which was discharged by run-off was transported with decomposition and sedimentation in a tidal river. Concentration of SPM with a particle size greater than 0.45 μm increased due to resuspension in a tidal river. Origin of SPM with a size of less than 0.45 μm at upstream areas was from natural soil and most of such SPM which had been transported settled near a river mouth. It was determined from examination of the CN ratio and the ratio of the number of attached bacteria to free bacteria that SPM with a size greater than 1.0 μm at upstream areas was decomposing intensively. At the downstream areas, SPM with a size of less than 0.45 μm came from the sea. SPM with particle size greater than 1.0 μm consisted of plankton and substances which were decomposed sufficiently while flowing.

Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

2018 ◽  
Vol 3 (1) ◽  
pp. 12 ◽  
Author(s):  
Zaimahwati Zaimahwati ◽  
Yuniati Yuniati ◽  
Ramzi Jalal ◽  
Syahman Zhafiri ◽  
Yuli Yetri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Surface Morphology ◽  
Average Diameter ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Scanning Electron ◽  
Sedimentation Processes

<p>Pada penelitian ini telah dilakukan isolasi dan karakterisasi bentonit alam menjadi nanopartikel montmorillonit. Bentonit alam yang digunakan diambil dari desa Blangdalam, Kecamatan Nisam Kabupaten Aceh Utara.  Proses isolasi meliputi proses pelarutan dengan aquades, ultrasonic dan proses sedimentasi. Untuk mengetahui karakterisasi montmorillonit dilakukan uji FT-IR, X-RD dan uji morfologi permukaan dengan Scanning Electron Microscopy (SEM). Partikel size analyzer untuk menganalisis dan menentukan ukuran nanopartikel dari isolasi bentonit alam. Dari hasil penelitian didapat ukuran nanopartikel montmorillonit hasil isolasi dari bentonit alam diperoleh berdiameter rata-rata 82,15 nm.</p><p><em>In this research we have isolated and characterized natural bentonite into montmorillonite nanoparticles. Natural bentonite used was taken from Blangdalam village, Nisam sub-district, North Aceh district. The isolation process includes dissolving process with aquades, ultrasonic and sedimentation processes.  The characterization of montmorillonite, FT-IR, X-RD and surface morphology test by Scanning Electron Microscopy (SEM). Particle size analyzer to analyze and determine the size of nanoparticles from natural bentonite insulation. From the research results obtained the size of montmorillonite nanoparticles isolated from natural bentonite obtained an average diameter of 82.15 nm.</em></p>

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