scholarly journals INVESTIGATION OF NATURAL ANALCIME-RICH ZEOLITE TUFF FROM TURKEY: A COMBINED XRD, XRF, FT-IR AND SEM STUDY

2021 ◽  
Vol 9 (Iconat Special Issue 2021) ◽  
pp. 36-41
Author(s):  
Meryem AKBELEN
Keyword(s):  
Sem Study ◽  
Ft Ir ◽  
Zeolite Tuff

scholarly journals Synthesis and characterization of organoclay modified with cetylpyridinium chloride

2015 ◽  
Vol 50 (1) ◽  
pp. 65-70 ◽  
Author(s):  
N Banik ◽  
SA Jahan ◽  
S Mostofa ◽  
H Kabir ◽  
N Sharmin ◽  
...  
Keyword(s):  
Cetylpyridinium Chloride ◽  
Basal Spacing ◽  
X Ray Diffraction ◽  
Clay Particles ◽  
Ion Exchange Reaction ◽  
Ir Studies ◽  
Sem Study ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Bentonite has been subjected to modification through ion-exchange reaction by 1-cetylpyridinum chloride. The modified samples were studied by X-ray diffraction (XRD) technique, Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The basal spacing of unmodified bentonite, determined by XRD was 14.99 Å and after modification it increased up to 16.97 Å and 16.22 Å at 1CEC and 2CEC. The FT-IR studies revealed structural differences between the modified and unmodified bentonite samples. The IR spectra of the modified bentonite showed the C-C stretching bands (1465 and 1462 cm-1) and C-H vibrations (near 2926 and 2852; 2854 cm-1). Results of the SEM study revealed a tendency towards lump formation and agglomeration of the organomodified clay particles of bentonite. The possibility of the use of new organoclay to adsorb oils from aqueous solution will be explored.Bangladesh J. Sci. Ind. Res. 50(1), 65-70, 2015

Chemical modification of chitosan by phosphorylation: an XPS, FT-IR and SEM study

2005 ◽  
Vol 16 (12) ◽  
pp. 1575-1593 ◽  
Author(s):  
I. F. Amaral ◽  
P. L. Granja ◽  
M. A. Barbosa
Keyword(s):  
Chemical Modification ◽  
Sem Study ◽  
Ft Ir

Preparation and Characteristics of Electrospun Polypropylene Fibers: Effect of Organic Solvents

2011 ◽  
Vol 175-176 ◽  
pp. 337-340 ◽  
Author(s):  
Kei Watanabe ◽  
Taiki Nakamura ◽  
Byoung Suhk Kim ◽  
Ick Soo Kim
Keyword(s):  
Surface Morphology ◽  
Solvent System ◽  
Molecular Structures ◽  
Sem Images ◽  
Syndiotactic Polypropylene ◽  
Sem Study ◽  
Ft Ir ◽  
Ir Analysis ◽  
Solvent Systems ◽  
Surface Morphologies

Recently, we have reported that syndiotactic polypropylene (sPP) fibrous membrane could be successfully prepared from a multi component solvent system via electrospinning at room temperature. The base solvent of multi component solvent system was cyclohexane. As demonstrated SEM images, the formation of rough surface morphologies and the microholes on electrospun sPP fibers were observed. In this study, we successfully prepared sPP nanofiber webs from a different base solvent was decalin. SEM study demonstrated that the sPP nanofibers prepared from decalin based solvent had smoother surface morphology unlike cyclohexane based solvent, suggesting that the surface morphology of electrospun sPP nanofibers depended on the boiling point of each solvent used. Moreover, to investigate the crystal and molecular structures of electrospun sPP fibers from a different solvent system (i.e., decalin and cyclohexane based solvents), WAXD and FT-IR analysis were carried out. The results showed that the different solvent systems caused the different surface morphologies but the crystal and molecular structure of the electrospun sPP fibers didn’t change.

scholarly journals Exploring Existence of Host-Guest Inclusion Complex of β-Cyclodextrin of a Biologically Active Compound with the Manifestation of Diverse Interactions

2018 ◽  
Vol 2 (5) ◽  
pp. 251 ◽  
Author(s):  
Habibur Rahaman ◽  
Niloy Roy ◽  
Aditi Roy ◽  
Samapika Ray ◽  
Mahendra Nath Roy
Keyword(s):  
Inclusion Complex ◽  
Biologically Active ◽  
Visible Spectroscopy ◽  
Inclusion Process ◽  
Nmr Study ◽  
Sem Study ◽  
Ft Ir ◽  
Uv Visible ◽  
Hoff Equation ◽  
Diverse Interactions

The host–guest interaction of p-nitro benzaldehyde as guest β-Cyclodextrins have been investigated which have significant applications in the field of medicine such as controlled drug delivery. The 1H NMR study confirms the formation of inclusion complex while surface tension and conductivity studies support the formation inclusion complex with 1:1 stoichiometry. The stoichiometry of the inclusion complex was also supported with Job’s plot method by UV-Visible spectroscopy. FT-IR spectra and SEM study also support the inclusion process. Association constants of  the inclusion complexes have  been  calculated using  the  Benesi–Hildebrand  method,  while  the  thermodynamic  parameters  have  been  estimated  with  the help  of  van’t  Hoff  equation.

scholarly journals A STUDY OF CORROSION INHIBITON EFFECT OF THIOSEMICARBAZIDE BASED SCHIFF BASE ON ALUMINIUM METAL IN ACIDIC MEDIUM

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
V.K. Swami ◽  
V.K. Swami ◽  
V.K. Swami
Keyword(s):  
Schiff Base ◽  
Acidic Medium ◽  
Inhibition Efficiency ◽  
Significant Loss ◽  
Stable Form ◽  
Sem Study ◽  
Ft Ir ◽  
And Control ◽  
Aluminium Metal ◽  
Percentage Inhibition Efficiency

Corrosion is the destruction of metal surface by the reaction with its environment (humidity, gases, acid, alkaline etc.). In this process metal convert in to the more stable form such as sulphide oxide etc. Corrosion of materials and structures is a hindrance to the development of society as it causes significant loss to the economy, leads to pollution, and leads to serious disasters, hence its prevention and control is of great benefit for the humanity. Addition of corrosion inhibitors is one of the practical and easy methods to protect metals and alloys against attack of corrosion in many industrial environments. In this chapter thiosemicarbazide based Schiff base 2-[(3,4-dihydroxy-5-nitrophenyl)methylidene]hydrazine1-carbothioamide (DHNPMHC) was synthesized and characterized using elemental analysis, FT-IR and UV–Vis methods. The inhibition efficiency of Schiff base DHNPMHC against aluminium corrosion in 0.5 M HCl was examined using mass loss measurement and scanning electron microscopy (SEM). Results showed that DHNPMHC is an effective inhibitor for aluminium corrosion in 0.5 M HCl solution. The inhibition efficiency also increased with concentration of inhibitor increased. Maximum percentage inhibition efficiency 92.6 % (at 4-hour immersion time) is shown at highest concentration of inhibitor 5% (5X10-5M). Adsorption of the inhibitor on the aluminium surface followed Langmuir adsorption isotherm. SEM study of aluminium surface in presence of inhibitor and in absence of inhibitor also supports the inhibition of corrosion in acidic medium. All results show that the Schiff base of thiosemicarbazide (DHNPMHC) is excellent corrosion inhibitor for aluminium in 0.5 M HCl.

FT-IR/ATR and SEM study of colloidal particle deposition

1999 ◽  
Vol 154 (1-2) ◽  
pp. 115-125 ◽  
Author(s):  
W.M Cross ◽  
S Ma ◽  
R.M Winter ◽  
J.J Kellar
Keyword(s):  
Particle Deposition ◽  
Colloidal Particle ◽  
Sem Study ◽  
Ft Ir

scholarly journals The Characterization of Local Clay from Anambra State Nigeria for Its Potential Applications in the Production of Ceramic Whitewares

2020 ◽  
pp. 22-33
Author(s):  
F. O. Nnaneme ◽  
T. U. Onuegbu ◽  
S. C. Agbo ◽  
E. S. Okwute
Keyword(s):  
Raw Materials ◽  
Xrd Analysis ◽  
Silica Content ◽  
Hydroxyl Groups ◽  
Local Clay ◽  
Anambra State ◽  
Clay Deposits ◽  
Sem Study ◽  
Potential Applications ◽  
Ft Ir

Local clay deposits from Ukpor in Nnewi South Local Government Area of Anambra State were characterized for its potential applications in the production of ceramics whitewares. XRF analysis of the clay revealed that it has high silica and alumina contents with some flux oxides. XRD analysis also revealed that of all the minerals present in the clay, quartz has the highest constituent followed by kaolinite and rutile. FT-IR analysis revealed that the bands corresponds to 3500 cm-1 to 4000   cm-1 indicating the presence hydroxyl groups (OH) and Si-O symmetry vibration stretch at 1206.207 cm-1 which confirmed the kaolinite structure of the clay. The SEM study showed a finely distributed uniform surface with isolated patches of granulated texture which explained the physical behaviour of the clay. The EDS spectrum of the formulated fired Ukpor clay indicated the presence of O, Al, K, Ca, K, Fe, and Si. The study revealed that an increase in the firing temperature and feldspar contents of the clay increases its bulk density, while the apparent density decreases with increase in temperature. Apparent porosity showed that there was a decrease from 25% to 3%, and the water absorption increases with increase in the silica content and decreases with temperature and feldspar increase. The shrinkage increases with the increase in temperature. The results concluded that the clay sample could be utilized as an industrial raw materials for the production of ceramic whitewares.

scholarly journals Indium Tin Oxide Nanocomposites – Green Synthesis, Characterization, Morphology and Optical Properties Using Almond Gum

2021 ◽  
Vol 11 (1) ◽  
pp. 3134-3141
Keyword(s):  
Optical Properties ◽  
Ir Spectra ◽  
Green Synthesis ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Crystal Size ◽  
Xrd Study ◽  
Vis Spectroscopy ◽  
Sem Study ◽  
Ft Ir

In this present study, Tin doped In2O3 metal oxide was synthesized by green synthesis using almond gum as a reducing agent. The prepared Nanocomposite (Ncs) was characterized by TG-DTA, XRD, SEM, EDX, FTIR, and UV-Vis spectroscopy. From TG-DTA able to get some information regarding calcination temperature. This was found out to be over 300 °C. The XRD study revealed that the In2O3-SnO2nanocomposite with crystal size 13 nm to 16 nm. The SEM study revealed that the morphology of prepared nanocomposite is Cubic phased sphere structure, and EDAX data show that elements in the composite of In2O3-SnO2 are O 74.71%, In 23.45%, and Sn 1.84%. FT-IR spectra confirm the formation of the In-O-In and Sn-O-Sn type of bonding. The UV-Vis spectra imply the bandgap of generated In2O3- Sno2Ncs is 3.83ev.

Effect of Contraceptive Steroids on the Endometrium of Guinea Pig: SEM study

1977 ◽  
Vol 35 ◽  
pp. 668-669
Author(s):  
Mai M. Said ◽  
Ramesh K. Nayak ◽  
Randall E. McCoy
Keyword(s):  
Guinea Pig ◽  
Reproductive Tract ◽  
Three Dimensional ◽  
Female Reproductive Tract ◽  
Human Female ◽  
Surface Ultrastructure ◽  
Transmission Electron ◽  
Sem Study ◽  
Uterine Mucosa ◽  
Group 1

Burgos and Wislocki described changes in the mucosa of the guinea pig uterus, cervix and vagina during the estrous cycle investigated by transmission electron microscopy. More recently, Moghissi and Reame reported the effects of progestational agents on the human female reproductive tract. They found drooping and shortening of cilia in norgestrel and norethindrone- treated endometria. To the best of our knowledge, no studies concerning the effects of mestranol and norethindrone given concurrently on the three-dimensional surface features on the uterine mucosa of the guinea pig have been reported. The purpose of this study was to determine the effect of mestranol and norethindrone on surface ultrastructure of guinea pig uterus by SEM.Seventy eight animals were used in this study. They were allocated into two groups. Group 1 (20 animals) was injected intramuscularly 0.1 ml vegetable oil and served as controls.

An Established Epithelial Cell Line (NPC/HK1) from a Nasopharyngeal Carcinoma - II. A Sem Study

1982 ◽  
Vol 40 ◽  
pp. 224-225
Author(s):  
Li C.L. ◽  
Chew E.C. ◽  
Huang D.P. ◽  
Ho H.C. ◽  
Mak L.S. ◽  
...  
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Epithelial Cell ◽  
Surface Morphology ◽  
Cell Line ◽  
Epithelial Cell Line ◽  
Present Communication ◽  
Cells In Culture ◽  
Sem Study ◽  
Well Differentiated

An epithelial cell line, NPC/HK1, has recently been successfully established from a nasopharyngeal carcinoma of the moderately to well differentiated squamous type. The present communication reports on the surface morphology of the NPC/HK1 cells in culture.

Sign in / Sign up

Export Citation Format

Share Document