Fractional study of the microfibrillated cellulose

TAPPI Journal ◽  
2014 ◽  
Vol 13 (7) ◽  
pp. 49-55 ◽  
Author(s):  
OSSI LAITINEN ◽  
JOUKO NIINIMÄKI
Keyword(s):  
Reference Method ◽  
Practical Method ◽  
Particle Size Analysis ◽  
Morphological Properties ◽  
Size Analysis ◽  
Particle Analysis ◽  
The Novel ◽  
Analysis Method ◽  
Aspect Ratios ◽  
Fractional Analysis

The extremely high aspect ratios of minuscule lignocellulosic particles make analysis and characterization problematic. New methods to quantify the size, shape, and structure of cellulose microparticles are needed. The main objective of this research has been to study the potential of a novel fractional analysis method for microparticles. Laser diffraction–based particle size analysis was used as a reference method. Samples were also visualized using an electron microscope. Results of the novel fractional analysis method are presented as a percentage of particles in the different size fractions, according to the particle dimensions. The process is potentially a practical method for analyzing the morphological properties of microcellulose. Tube flow fractionation works especially well for particles with high aspect ratios, which typically pose a major problem for conventional particle analysis methods.

An Algorithm for Particle Size Analysis of Gravel Image by Using Gray-Value Vibration Frequency

2013 ◽  
Vol 318 ◽  
pp. 253-256
Author(s):  
Si Yu Yu ◽  
Shao Hua Li ◽  
Jun Li ◽  
Dao Wan Song ◽  
Jing Hua Shi
Keyword(s):  
Particle Size ◽  
Particle Image ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Watershed Algorithm ◽  
Analysis Method ◽  
Image Size ◽  
Segmentation Method ◽  
Gravel Size ◽  
Production Practice

Due to it is very extensive usage in the application of production practice and scientific research in the present,Identifying particle size from digital image is an important technology.Up to now there have been some particle image size identification methods,Such as the improved watershed algorithm for adhesive rice image segmentation,Particle size analysis method based on spatial autocorrelation for deposit digital Image.But because the gravel image is a kind of special particle image,those methods are not very suitable for use in particle size analysis of gravel image.This paper puts forward a new particle image size identification method.Combing with the image threshold segmentation method,this new method is better able to extract gravel object from gravel image and rebuild the grid model of gravel size.

scholarly journals Log-Cubic Method for Generation of Soil Particle Size Distribution Curve

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Songhao Shang
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Cross Validation ◽  
Interpolation Method ◽  
Physical Property ◽  
Particle Size Analysis ◽  
Soil Particle ◽  
Size Analysis ◽  
Particle Analysis

Particle size distribution (PSD) is a fundamental physical property of soils. Traditionally, the PSD curve was generated by hand from limited data of particle size analysis, which is subjective and may lead to significant uncertainty in the freehand PSD curve and graphically estimated cumulative particle percentages. To overcome these problems, a log-cubic method was proposed for the generation of PSD curve based on a monotone piecewise cubic interpolation method. The log-cubic method and commonly used log-linear and log-spline methods were evaluated by the leave-one-out cross-validation method for 394 soil samples extracted from UNSODA database. Mean error and root mean square error of the cross-validation show that the log-cubic method outperforms two other methods. What is more important, PSD curve generated by the log-cubic method meets essential requirements of a PSD curve, that is, passing through all measured data and being both smooth and monotone. The proposed log-cubic method provides an objective and reliable way to generate a PSD curve from limited soil particle analysis data. This method and the generated PSD curve can be used in the conversion of different soil texture schemes, assessment of grading pattern, and estimation of soil hydraulic parameters and erodibility factor.

The Effect of Ge on the Electrochemical Performance of Sn/C Nanocomposite Anode Materials for Lithium Ion Batteries

2015 ◽  
Vol 1094 ◽  
pp. 229-233
Author(s):  
Jian Qiu Deng ◽  
Jin Pan ◽  
Tian Chen ◽  
Hai Qing Qin ◽  
Wen Ping Liu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Anode Materials ◽  
Lithium Ion ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Capacity Fade ◽  
Analysis Method ◽  
Composite Powders ◽  
X Ray ◽  
Milling Method

nanosized Sn-Ge/C composite powders were successfully prepared by rocking vibratory ball milling method, and characterized with X-ray powder diffraction and laser particle size analysis method. The electrochemical performance of the nanocomposite anodes was investigated by charge-discharge tests. The results show that Ge exhibits as the elemental form in the nanocomposites. The capacity of nanocomposite anodes can be enhanced by the introduction of micro-sized Ge powders. The Sn90Ge10/C nanocomposite anodes deliver the optimum electrochemical performance, including discharge capacity and cycling stability. However, the relatively fast capacity fade of the nanocompsoite anodes need to be further improved.

Chemically Modified Castor Oil for Softening of Leather– A Novel Approach

2021 ◽  
Vol 116 (4) ◽  
Author(s):  
Bindia Sahu ◽  
M. Sathish ◽  
G. C. Jayakumar
Keyword(s):  
Castor Oil ◽  
Particle Size Analysis ◽  
Sem Analysis ◽  
Size Analysis ◽  
The Novel ◽  
Physical Strength ◽  
Novel Approach ◽  
Uniform Dispersion ◽  
The Matrix ◽  
Tanning Process

Fatliquoring is an important step of post tanning process of leathermanufacturing where incorporation of self-emulsified oil (lubricant)makes the leather soft. There are several methods which introducepolarity into oil and provide the path where reactive species ofmodified oil can interact with water which leads to form a fatliquor.The aim of this work is to introduce an extra polarity into the fattyacid moiety through chemical modification of castor oil by carbeneintermediate. The spectroscopic characterisation such as FTIR,1H-NMR and 13C-NMR of fatliquor have been carried out. Particle size analysis of fatliquor has also been done. The experimental leathers have been tested for physical strength characterisation such as tensile and tear strength verses control and found to have better properties than control. SEM analysis for morphological study of experimental leather were also carried out which clearly indicates the uniform dispersion of fiber bundles due to the fine distribution of the novel and self-emulsifying fatliquor throughout the matrix.

scholarly journals Pharmaceutical and Physico Chemical Analysis of Tuttha Bhasma

2021 ◽  
pp. 1-8
Author(s):  
Anjana V Mani ◽  
R Rajam
Keyword(s):  
Chemical Analysis ◽  
Copper Sulphate ◽  
Hexagonal Lattice ◽  
Particle Size Analysis ◽  
Sodium Sulphate ◽  
Nano Particles ◽  
Size Analysis ◽  
Particle Analysis ◽  
X Ray ◽  
Physico Chemical

Rasa sastra is an ancient science dealing with various drugs of mineral and metallic origin Tuttha (copper sulphate) is a mineral useful in various clinical conditions externally as well as internally. According to Rasasastra, through the process of Shodhana (purification) and Marana (incineration) the harmful effects of Tuttha bhasma (incinerated copper sulphate) is nullified resulting in the formation of a newer compound that is therapeutically more potent. To prepare Tuttha Bhasma by adopting standard manufacturing procedure explained in Ayurvedic texts as well as to study it’s physical and chemical characters using traditional and modern analytical tools. The pharmaceutical processing of Tuttha bhasma was carried out in three Kukkuta puta (incineration) with a peak temperature of 6100C according to Rasa Tarangini reference. Physico chemical analysis, Energy-Dispersive X-ray Fluorescence (EDXRF), X-ray Diffraction (XRD), Particle Size Analysis (PSA) were conducted. The final product shows presence of nano particles which was confirmed by particle analysis. XRD results of Tuttha bhasma revealed the presence of copper sulphide (covellite) with hexagonal lattice and sodium sulphate with orthorhombic structure. All of the preparation stages and changes in the properties were documented and validated, and they may now be used as a valuable tool for standardization and quality assurance of Tuttha bhasma.

scholarly journals Role of Microscopy as the Reference Method for Particle Size Analysis in Drug Development

2011 ◽  
Vol 17 (S2) ◽  
pp. 1146-1147 ◽  
Author(s):  
L DiMemmo ◽  
M Hubert ◽  
B Sarsfield ◽  
B Shekunov
Keyword(s):  
Particle Size ◽  
Drug Development ◽  
Reference Method ◽  
Particle Size Analysis ◽  
Size Analysis

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

scholarly journals Reduction of food histamine in white wine by Bromelain, Quercetin and Ascorbic acid

2021 ◽  
Vol 4 (2) ◽  
pp. 130
Author(s):  
Ravinder Kaur Kalhaa ◽  
Gauri Damgude ◽  
Ashish Dabade
Keyword(s):  
Ascorbic Acid ◽  
White Wine ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Scavenging Activity ◽  
Analysis Method ◽  
Dpph Scavenging Activity ◽  
Sensory Parameters ◽  
Dpph Scavenging ◽  
Reducing Capacity

The scope of this work was to reduce the level of the biogenic amine ‘histamine’ in White wine. Different concentrations of 100 ml wine samples were prepared by incorporating various concentrations Bromelain; Quercetin and Ascorbic acid. A spectrophotometric based histamine analysis method was carried out to determine histamine concentrations. The histamine concertation reduced in 200mg/L Bromelain, 50mg/L Quercetin and 400mg/L Ascorbic acid treated samples by 62.34%, 61.64% and 46.41% respectively. The percentage DPPH scavenging activity was found to be 83.93%, 93.54%, 133.08% respectively against normal wine 86.93%. No significant changes observed in physicochemical properties of wine like functional groups; particle size analysis; effect on amino acids; turbidity; colour analysis; pH and sensory analysis in bromelain treated wine samples as compared to other samples. Reduction of histamine can be carried out by Bromelain (200mg/L) effectively than Quercetin and Ascorbic acid; based on the reducing capacity and the sensory parameters.

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