Structure and Characteristics of Pineapple Leaf Fibers Obtained from Pineapple Leaves

2014 ◽  
Vol 998-999 ◽  
pp. 316-319 ◽  
Author(s):  
Chao Hong Dong ◽  
Zhou Lv ◽  
Liang Zhang ◽  
Hong Jie Shen ◽  
Na Na Li ◽  
...  
Keyword(s):  
Structural Characteristics ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Essential Information ◽  
X Ray ◽  
High Fiber ◽  
Pineapple Leaf Fiber ◽  
Yarn Quality ◽  
Pineapple Leaves ◽  
Leaf Fiber

Pineapple leaf fiber is a nature hemp leaf fiber extracted from pineapple leaves. Its structural characteristics was investigated by means of scanning electron microscope (SEM), X-ray diffraction (XRD), Differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). The results showed that the percent crystallinity and preferred orientation of crystallites in pineapple fibers were 60.82% and 98.5%, respectively. The average fracture strength of the pineapple leaf fiber is high and the linear density is low, so there is a high fiber spinnability and yarn quality. The present study is expected to provide essential information for the preparation and processing of pineapple leaf fibers.

The Controllable Preparation, Properties and Structural Characteristics of Xylitol/Menthol Co-crystals

2017 ◽  
Vol 13 (8) ◽  
Author(s):  
Zhanzhong Wang ◽  
Xiao Zhang ◽  
Boru Chen ◽  
Mengna Hou ◽  
Tiankuo Liu
Keyword(s):  
Food Production ◽  
Food Industry ◽  
Structural Characteristics ◽  
High Ratio ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Important Idea ◽  
Diffraction Patterns ◽  
Controllable Preparation

AbstractXylitol is fast gaining ground over other sugar substitute owing to its high sweeting and low calorie properties. Menthol, a flavor agent, is widely used in food production. However, menthol can easily sublimate, while xylitol has a strong hygroscopicity. In this study, the co-crystals of xylitol with menthol are performed aiming to improve their negative properties. The results indicated that the water activity of co-crystals varies from 0.126 to 0.370. Meanwhile, the hygroscopicity of co-crystals is reduced to some extent compared with xylitol. Differential scanning calorimetry results demonstrated that co-crystals have similar thermal properties. What’s more, co-crystals have nearly identical X-ray diffraction patterns with xylitol. Thus, it is suggested that the microstructure of co-crystals is influenced mostly by the compound with a high ratio. Overall, this study can convey important idea for the development of food new materials, also the control and application based on co-crystallization techniques in food industry.

Structural Characteristics and Electrochemical Properties of Mg-Ni-Cu-Y Alloy Synthesized by Mechanical Alloying

2005 ◽  
Vol 488-489 ◽  
pp. 689-692
Author(s):  
Li Min Wang ◽  
Xin Bo Zhang ◽  
Yao Ming Wu
Keyword(s):  
Electron Microscopy ◽  
Mechanical Alloying ◽  
Electrochemical Properties ◽  
Structural Characteristics ◽  
Powder Materials ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Nanocrystalline Phases ◽  
Scanning Electron

A powder material of Mg-Ni-Cu-Y was synthesized by mechanical alloying method. Considerable amounts of amorphous and nanocrystalline phases formed after a mixture of elemental powder with the overall composition of Mg78Ni9Cu11Y2 was mechanical alloyed for 200 h. The phase formed in the synthesized powder materials was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The electrochemical properties were examined with a solution of 6M KOH.

CHARACTERIZATION AND MICROHARDNESS OF ELECTRODEPOSITED Ni–W COATINGS OBTAINED FROM GLUCONATE BATH

2015 ◽  
Vol 22 (01) ◽  
pp. 1550011 ◽  
Author(s):  
PARTHASARATHI BERA ◽  
M. DINESH KUMAR ◽  
CHINNASAMY ANANDAN ◽  
C. SHIVAKUMARA
Keyword(s):  
Photoelectron Spectroscopy ◽  
Pulse Current ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Force Microscopy ◽  
Dsc Studies ◽  
Atomic Force ◽  
Different Temperatures

Ni – W alloy coatings are electrodeposited with direct and pulse current using gluconate bath at pH5. Effects of direct current (DC) and pulse current (PC) on structural characteristics of the coatings have been investigated by energy dispersive X-ray spectroscopy (EDXS), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS). EDXS shows that W contents are 13.3 and 12.6 at.% in DC and PC (10:40) Ni – W coatings, respectively. FESEM analysis exhibits the homogeneous coarse nodular morphology in DC plated deposits. DSC studies reveal that Ni – W coatings are thermally stable up to 400°C. XPS studies demonstrate that DC plated coating has significant amount of Ni and W in elemental form along with their respective oxidized species. In contrast, mainly oxidized metals are present in the as-deposited coatings prepared with PC plating. The microhardness of pulse current (100:400) deposited Ni – W coating is about 750 HK that is much higher than DC plated coating (635 HK). Heat treatment of the deposits carried out at different temperatures show a significant increase in microhardness which can be comparable with hard chromium coatings.

IR and X-ray diffraction studies of raw and chemically treated pineapple leaf fiber (PALF)

1991 ◽  
Vol 42 (10) ◽  
pp. 2767-2772 ◽  
Author(s):  
S. C. Saha ◽  
P. K. Ray ◽  
S. N. Pandey ◽  
K. Goswami
Keyword(s):  
X Ray Diffraction ◽  
X Ray ◽  
Pineapple Leaf Fiber ◽  
Chemically Treated ◽  
Leaf Fiber

A High Resolution Study of G.P. Zones in Aluminum - 4.2 at % Silver

1982 ◽  
Vol 40 ◽  
pp. 722-723 ◽  
Author(s):  
R. Gronsky
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Computer Simulations ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Study

The phenomenon of clustering in Al-Ag alloys has been extensively studied since the early work of Guinierl, wherein the pre-precipitation state was characterized as an assembly of spherical, ordered, silver-rich G.P. zones. Subsequent x-ray and TEM investigations yielded results in general agreement with this model. However, serious discrepancies were later revealed by the detailed x-ray diffraction - based computer simulations of Gragg and Cohen, i.e., the silver-rich clusters were instead octahedral in shape and fully disordered, atleast below 170°C. The object of the present investigation is to examine directly the structural characteristics of G.P. zones in Al-Ag by high resolution transmission electron microscopy.

Studies on the Preparation, Characterization and Solubility of -Cyclodextrin-Roxythromycin Inclusion Complexes

2009 ◽  
Vol 2 (2) ◽  
pp. 523-530
Author(s):  
D. Nagasamy Venkatesh ◽  
S. Karthick ◽  
M. Umesh ◽  
G. Vivek ◽  
R.M. Valliappan ◽  
...  
Keyword(s):  
Dissolution Rate ◽  
Inclusion Complexes ◽  
Phase Solubility ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Ir Studies ◽  
Poorly Soluble ◽  
Poorly Soluble Drug

Roxythromycin/ β-cyclodextrin (Roxy/ β-CD) dispersions were prepared with a view to study the influence of β-CD on the solubility and dissolution rate of this poorly soluble drug. Phase-solubility profile indicated that the solubility of roxythromycin was significantly increased in the presence of β-cyclodextrin and was classified as AL-type, indicating the 1:1 stoichiometric inclusion complexes. Physical characterization of the prepared systems was carried out by differential scanning calorimetry (DSC), X-ray diffraction studies (XRD) and IR studies. Solid state characterization of the drug β-CD binary system using XRD, FTIR and DSC revealed distinct loss of drug crystallinity in the formulation, ostensibly accounting for enhancement of dissolution rate.

scholarly journals A review of nanotechnology with an emphasis on Nanoplex

2015 ◽  
Vol 51 (2) ◽  
pp. 255-263
Author(s):  
Rupali Nanasaheb Kadam ◽  
Raosaheb Sopanrao Shendge ◽  
Vishal Vijay Pande
Keyword(s):  
Drug Delivery ◽  
Drug Delivery Systems ◽  
Drug Loading ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Conventional Drug ◽  
Anionic Drugs ◽  
Oppositely Charged ◽  
The Brain

<p>The use of nanotechnology based on the development and fabrication of nanostructures is one approach that has been employed to overcome the challenges involved with conventional drug delivery systems. Formulating Nanoplex is the new trend in nanotechnology. A nanoplex is a complex formed by a drug nanoparticle with an oppositely charged polyelectrolyte. Both cationic and anionic drugs form complexes with oppositely charged polyelectrolytes. Compared with other nanostructures, the yield of Nanoplex is greater and the complexation efficiency is better. Nanoplex are also easier to prepare. Nanoplex formulation is characterized through the production yield, complexation efficiency, drug loading, particle size and zeta potential using scanning electron microscopy, differential scanning calorimetry, X-ray diffraction and dialysis studies. Nanoplex have wide-ranging applications in different fields such as cancer therapy, gene drug delivery, drug delivery to the brain and protein and peptide drug delivery.</p>

scholarly journals Diethylstilbestrol Modifies the Structure of Model Membranes and Is Localized Close to the First Carbons of the Fatty Acyl Chains

Biomolecules ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 220
Author(s):  
Alessio Ausili ◽  
Inés Rodríguez-González ◽  
Alejandro Torrecillas ◽  
José A. Teruel ◽  
Juan C. Gómez-Fernández
Keyword(s):  
Membrane Surface ◽  
Water Layer ◽  
Fatty Acyl ◽  
31P Nmr Spectroscopy ◽  
Relaxation Rates ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Acyl Chains ◽  
Dynamics Simulations

The synthetic estrogen diethylstilbestrol (DES) is used to treat metastatic carcinomas and prostate cancer. We studied its interaction with membranes and its localization to understand its mechanism of action and side-effects. We used differential scanning calorimetry (DSC) showing that DES fluidized the membrane and has poor solubility in DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine) in the fluid state. Using small-angle X-ray diffraction (SAXD), it was observed that DES increased the thickness of the water layer between phospholipid membranes, indicating effects on the membrane surface. DSC, X-ray diffraction, and 31P-NMR spectroscopy were used to study the effect of DES on the Lα-to-HII phase transition, and it was observed that negative curvature of the membrane is promoted by DES, and this effect may be significant to understand its action on membrane enzymes. Using the 1H-NOESY-NMR-MAS technique, cross-relaxation rates for different protons of DES with POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) protons were calculated, suggesting that the most likely location of DES in the membrane is with the main axis parallel to the surface and close to the first carbons of the fatty acyl chains of POPC. Molecular dynamics simulations were in close agreements with the experimental results regarding the location of DES in phospholipids bilayers.

scholarly journals Effects of Sintering Temperature on Densification, Microstructure and Mechanical Properties of Al-Based Alloy by High-Velocity Compaction

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 218
Author(s):  
Xianjie Yuan ◽  
Xuanhui Qu ◽  
Haiqing Yin ◽  
Zaiqiang Feng ◽  
Mingqi Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Velocity ◽  
Sintered Density ◽  
Sintering Temperature ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Transmission Electron ◽  
High Velocity Compaction ◽  
Sintered Temperature

This present work investigates the effects of sintering temperature on densification, mechanical properties and microstructure of Al-based alloy pressed by high-velocity compaction. The green samples were heated under the flow of high pure (99.99 wt%) N2. The heating rate was 4 °C/min before 315 °C. For reducing the residual stress, the samples were isothermally held for one h. Then, the specimens were respectively heated at the rate of 10 °C/min to the temperature between 540 °C and 700 °C, held for one h, and then furnace-cooled to the room temperature. Results indicate that when the sintered temperature was 640 °C, both the sintered density and mechanical properties was optimum. Differential Scanning Calorimetry, X-ray diffraction of sintered samples, Scanning Electron Microscopy, Energy Dispersive Spectroscopy, and Transmission Electron Microscope were used to analyse the microstructure and phases.

Sign in / Sign up

Export Citation Format

Share Document