The Journal of American Science
(J Am Sci)
ISSN 1545-1003 (print); ISSN 2375-7264 (online),
doi prefix:10.7537, Monthly
Volume 12, Issue 11, Cumulated
No. 105, November 25, 2016
Cover (pdf),
Cover (jpg),
Introduction,
Contents,
Call
for Papers,
am1211
You can use the message in end of the article abstract to
cite it.
To get Microsoft Documents: After you open the
"Full Text" for each article, change the last 3 characters of
the web address from .pdf to .doc
Welcome to send
your manuscript(s) to:
americansciencej@gmail.com.
CONTENTS
No.
|
Titles / Authors
|
Full
Text
|
No.
|
1
|
Groundwater Quality and Vulnerability Assessment in the New
Reclamation Areas, Assuit Governorate, West Nile River, Egypt
Abdel-Hameed M. El-Aassar1*, Rasha A.
Hussien2, Saad Y. Ghoubachi3
1
Hydrogeochemistry Department, Desert Research Center, Cairo,
Egypt
2 Siting and
Environment Department, Nuclear& Radiological Regulatory
Authority, Cairo, Egypt.
3 Geological
Department, Desert Research Center, Cairo, Egypt
* Corresponding author,
Rashahussien76@yahoo.com
Abstract:
Groundwater vulnerability assessment to delineate areas that are
more susceptible to contamination from anthropogenic sources has
become an important element for sensible resource management and
land use planning. Reclamation processes at western part of
Assuit Governorate have created many hydrogeological and
environmental problems such as an increase of groundwater
salinity, soil deterioration and water logging on the new
cultivated land. This paper attempts to evaluate the groundwater
quality for drinking and agricultural purposes and produce
groundwater vulnerability maps using geographic information
system (GIS). For irrigation purposes about 75% of water samples
are unsuitable for MR (Magnesium Ratio) indicating unfavorable
effects on crop yield and an increase in soil alkalinity.
Calculating Kelly’s Index (KI) indicating 42% of water samples
have (KI˃1) shows an excess of sodium.Vulnerability maps were
produced by applying the Generic and Agricultural models
according to DRASTIC charter. The resulting maps revealed that
the potential for polluting groundwater with agricultural
chemicals is greater than with Generic DRASTIC index pollutants
due to extensive agricultural activities. Also, there are some
groundwater samples were polluted with nitrate, iron and
manganese. There is a trend of decreasing in both nitrate and
manganese concentrations from East to West, i.e., the degree of
pollution, decrease as we get far from the old cultivated lands
(from Pleistocene aquifer to Eocene aquifer) and vice versa of
iron.
[Abdel-Hameed M. El-Aassar, Rasha A. Hussien,
Saad Y. Ghoubachi.
Groundwater Quality and
Vulnerability Assessment in the New Reclamation Areas, Assuit
Governorate, West Nile River, Egypt. J Am Sci
2016;12(11):1-23].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org. 1.
doi:10.7537/marsjas121116.01.
Key words:
Groundwater Quality Index / Vulnerability/ DRASTIC Method/
Assuit Governorate. |
Full Text |
1
|
2
|
Classification of impacted
mandibular third molars in a sample of the Saudi population as
assessed by cone beam CT
Fatima Jadu1; Daniah
Alhazmi2; Fatma Badr3 and Ahmed Jan4
1Faculty
of Dentistry, King Abdulaziz University, KSA.
2King
Abdulaziz University and University of Iowa
3King
Abdulaziz University and University of Florida
4Faculty
of Dentistry, King Abdulaziz University, KSA.
fjadu@kau.edu.sa
Abstract: Objective:
Treatment planning the removal of impacted third molars requires
ample knowledge of their position and relation to adjacent vital
structures. Traditionally two-dimensional radiographs have been
used for this purpose. With the advent of volumetric imaging,
the aim of this study was to examine the classification of
impacted mandibular third molars using CBCT images. Materials
and methods: A cross sectional retrospective chart review
was conducted using the database of a university based oral and
maxillofacial radiology service. An oral and maxillofacial
radiologist reviewed the images of patient’s referred for CBCT
imaging prior to extraction of an impacted mandibular third
molar. Results: The images of 100 consecutive patients
were included. The most common mandibular third molar angulation
was mesioangular and the most common depth was Level B while the
most common ramus relation was class II. Discussion: New
classifications for impacted third molars should be developed
based on the added information provided by three-dimensional
imaging.
[Fatima
Jadu; Daniah Alhazmi; Fatma Badrand Ahmed Jan. Classification
of impacted mandibular third molars in a sample of the Saudi
population as assessed by cone beam CT.
J Am Sci
2016;12(11):24-27].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
2. doi:10.7537/marsjas121116.02.
Keyword:
Classification;
impacted; mandibular
third molars; Saudi population; assessed by cone beam CT |
Full Text |
2
|
3
|
Synthesis and Characteristics of Cellulosic Polymers from
Agricultural Environmental Pollutant Wastes
N.A. Alian, M.M. El-Sawy, S.F. Hamza, A.A. Borai and N.O.Shaker
Chemistry Department, Faculty of Science(Girls), Al-Azhar
University, Cairo Egypt.
Correspondence to N.O. Shaker, e-mail: nihal_shaker@hotmail.com.
Abstract:Cellulose
esters with saturated fatty acyl substituents (C12lauroyl
to C18stearoyl) were synthesized in homogenous medium
N,N,dimethylacetamide solution combined with lithium
chloride (DMAc/LiCl) using triethylamine (TEA) as acid scavenger
and characterized by means of FTIR and 1H NMR
spectroscopy. The thermal degradation of the esters was studied
by thermo gravimetric analysis (TGA) and differential
thermogravimetry (DTG). The products possess values of the
degree of substitution (DS) between 0.16 and 1.95. Rosin
cellulose esters were also prepared and studied for film
properties. It was found that these films can be made compatible
with conventional film formers such as alkyds, phenolics and
epoxy esters and the combinations could be used in various
surface coating formulations.
[N.A. Alian, M.M. El-Sawy, S.F. Hamza, A.A. Borai and N.O.Shaker.
Synthesis and Characteristics of Cellulosic Polymers from
Agricultural Environmental Pollutant Wastes.
J Am Sci
2016;12(11):28-39].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
3.
doi:10.7537/marsjas121116.03.
Key words:
Cellulose, cellulose esters, Rosin cellulose esters, DMAc/LiCl,
thermal analysis. |
Full Text |
3
|
4
|
Potential protective role of
barley's grains on methotrexate induced jejunal mucosal damage
in male albino rats
Mohamed Ahmed Dosuky1,
Esam Salah Kamel 2, Salwa Mohammed Ouies3,
Noha Abd El-Magid Ragab Fouda4
1Department
of Human Anatomy & Embryology,
Faculty of Medicine,
Alminia University, Egypt
2Department
f Human Anatomy & Embryology, Faculty of Medicine, Sohag
University, Egypt
3Department
of Human anatomy & Embryology, Faculty of Medicine, Sohag
University, Egypt
4Department
of Human anatomy & Embryology, Faculty of Medicine, Sohag
University, Egypt
salwaouies@yahoo.com
Abstract: Introduction:
Methotrexate (MTX) is
widely used as chemotherapy drug in the treatment of rheumatoid
disease. MTX is known for its common effect in causing
intestinal mucosal injury.
Barley (Hordeum vulgare
L.), an ancient grain, has been domesticated since 8000 B.C.
possesses significant antioxidant, antiradical potentials
and antiulcerative
activity. Aim of the
Work: To investigate
the Potential protective effects of barley's grains on
methotrexate induced jejunal mucosal damage in male albino rats
by light and scanning electron microscope and morphometric study.
Material and Methods:
thirty adult male rats weighting
150-200 gm were used and randomly divided into three equal
groups:
Control group; MTX group was
given 6 mg/kg body weight
of Methotrexate for 5
days intraperitoneal injection; the third group was given barley
grains at a dose of 200g /kg/day beside the usual food for 30
days plus intraperitoneal injections of methotrexate on the day
25, at the dose 6mg/kg /day for 5 days then sacrificed by
cervical dislocation. Jejunal samples were excised for light and
scanning electron microscopic study and
morphometric study. Results:
intraperitoneal administration of methotrexate induced
marked changes in jejunal mucosa detected by both light and
scanning electron
microscope with severe erosions, exfoliation and ulcer
formation. The addition of
barley significantly decrease jejunal damage and could protect
intestinal mucosa against the injurious effects of methotrexate.
Conclusions:
These results concluded that
methotrexate combined with
barley (Hordeum vulgare
L.) in comparison with
methotrexate induced less intestinal mucosal damage and this
protective effect might be due to the anti-inflammatory and
antiulcer activity of
barley.
[Mohamed Ahmed Dosuky, Esam Salah Kamel, Salwa Mohammed Ouies, Noha Abd
El-Magid Ragab Fouda.
Potential protective role of barley's grains on methotrexate
induced jejunal mucosal damage in male albino rats.
J Am Sci
2016;12(11):40-51].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
4.
doi:10.7537/marsjas121116.04.
Keywords:
Methotrexate, barley, jejunal mucosal, rats. |
Full Text |
4
|
5
|
Study on polyamide thin film
nano-composite membranes using different types of multi-walled
carbon nanotubes at different pH feed solutions
Abdel-Hameed Mostafa El-Aassar
Egyptian Desalination Research
Center of Excellence (EDRC), Desert Research Center (DRC),
Cairo, Egypt. Tel.:+202-01002501524;+202-26389069,
amelaassar@edrc.gov.eg,
hameed_m50@yahoo.com.
Abstract:
To enhance the performance of
polyamide thin film composite (PA-TFC) membranes,
non-functionalized, NH2 and COOH functionalized multi-walled
carbon nanotubes (MW-CNTs) were used as additives. The PA active
layer was prepared via interfacial polymerization between m-Phenylene
diamine (MPD) in aqueous phase and trimesoyl chloride (TMC) in
dodecane as organic phase. The obtained results indicated a
general improvement in the RO performance, the values of
permeate flux increased from 33.61 for non-modified PA-TFC
membrane to 37.78, 36.15, 38.12 L/m2.h for non-functionalized,
NH2, COOH functionalized MW-CNTs, respectively. The obtained
TFNC membranes possess high values of salt rejection (%) that is
not lower 99.63. The surface hydrophilicity of PA-TFNC membranes
improved as compared with the neat PA-TFC membrane. Also, the
rejection (R) of both Na+ and Cl-ions showed that at pH< 6.5, at
acidic media; the R (Na+) > R (Cl-). On the other hand, at pH >
6.5, at alkaline media the R (Na+) < R (Cl-). While, at pH=6.5,
at slightly neutral media; the R (Na+) = R (Cl-).
[Abdel-Hameed Mostafa El-Aassar.
Study on polyamide
thin film nano-composite membranes using different types of
multi-walled carbon nanotubes at different pH feed solutions.
J Am Sci
2016;12(11):52-63].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
5. doi:10.7537/marsjas121116.05.
Key words:
Thin film nano-composite
membranes; carbon nanotubes; water desalination; reverse
osmosis; pH feed solution. |
Full Text |
5
|
6
|
Effect of a Training Program
on Nurses' Knowledge and Performance Regarding Infection Control
Standard Precautions at M.C.H. Center in Rural Area
Hala Hassan Saied Khalil1and
Hoda Ahmed Hussein2
1Lecturer
of Community Health Nursing Department -Faculty of Nursing- El-Fayoum
University,
El-Fayoum, Egypt
2Lecturer
of Medical Surgical Nursing Department, Faculty of Nursing,
Modern University for Technology and Information, Egypt
hoda_hussein@ymail.com
Abstract:
Standard precautions formerly
known as universal precautions underpin routine safe practice
protecting both staff and clients from infection by applying
standard precautions at all times and to all patients. This
study aimed to evaluate the effect of a training program on
nurses' knowledge and performance regarding standard precautions
in M.C.H center. A quasi-experimental research was used to
conduct this study. The study was conducted at the mother and
child health center(M.C.H) affiliated to the ministry of health
and population at El- Fayoum village (Sanoras). A purposeful
sample was included 35 nurses who were working in
M.C. Hcenter after
receiving their consents for participation in the research. Two
tools were used to achieve the objective of the study:
Tool I: An interview questionnaire was developed and
used by the researchers as a tool for data collection. The
questionnaire consisted of two parts: The first part:
Is concerned with: The demographic characteristics of
nurses. The second part: A pre and post test
questionnaire was used to collect the nurses' knowledge
regarding standard precautions. Tool II: An
observational checklist sheet was used to record performance of
the nurses regarding application of standard precautions.
Majority of the studied nurses experienced deficit in their
knowledge and performance regarding infection control standard
precautions which is mainly related to not being used to do it
and this deficit was corrected after implementation of the
training program. It was concluded that training program
regarding infection control standard precautions was effective
in improving nurses’ knowledge and performance in M.C.H center
with highly statically significant differences in all tested
items between pre/post program implementation( P< 0.001). It was
recommended that
establishment of a training program for nurses and health team
members working in M.C.H centers
with continuous
supervision, assessment and evaluation of nurses performance
related to infection control measures to improve the quality of
care given in relation to prevention and control of infection in
M.C.H centers.
[Hala Hassan Saied Khalil
and
Hoda Ahmed Hussein. Effect of
a Training Program on Nurses' Knowledge and Performance
Regarding Infection Control Standard Precautions at M.C.H.
Center in Rural Area.
J Am Sci
2016;12(11):64-75].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
6. doi:10.7537/marsjas121116.06.
Keywords:
Infection control, standard
precautions, nurses’ knowledge – performance, nurses training
program. |
Full Text |
6
|
7
|
Impact of Plant Spacing on
Growth and Yield of Two Sweet Pepper Cultivars
Sabreen Kh. A. Ibraheim and A.
A. M. Mohsen
Horticulture Department, Faculty
of Agriculture, Zagazig University, Zagazig, Egypt
sabreenkh75@yahoo.com
Abstract:
A field experiment was carried out during two summer seasons of
2014 and 2015 at El-Khattara Experimental Farm, Fac. Agric.,
Zagazig University, Sharkia Governorate, Egypt, to study the
effect of plant spacing (20, 30, 40 and 50 cm) on growth, yield
and fruit quality for two sweet pepper cultivars (Primo and
Mohannad 4010). The results showed that,
Primo cultivar gave the
highest values of plant height, total dry weight per plant, leaf
area/ plant (LA),
leaf area index (LAI),
leaf area ratio (LAR),
specific leaf area (SLA), absolute growth rate (AGR), average
fruit weight, fruit yield/plant, total yield (ton/feddan) and K
(%) in fruits. While, Mohannad 4010 cultivar showed higher
values of number of fruits per plant and vitamin C content in
fruits. In addition, total dry weight per plant,
LA,
LAR,
AGR, average fruit weight, number of fruits per plant, fruit
yield per plant and vitamin C content in fruits increased with
increasing plant spacing up to 50 cm spacing. Furthermore, plant
spacing at 40 or 50 cm between plants recorded the highest
values of plant height, number of
both leaves and branches per plant with no significant
differences between them. While, plant spacing at 20 cm between
plants recorded higher values of
LAI,
SLA and total yield. The interaction treatments between Primo
cultivar and plant spacing at 50 cm had significant effect on
LA,
AGR and fruit yield/plant. While, Primo cultivar with plant
spacing at 40 or 50 cm gave the highest values of plant height,
total dry weight per plant and average fruit weight. On the
other hand, Primo cultivar with plant spacing at 20 cm was the
best interaction treatment in respect to
LAI,
SLA and total yield in the two studied seasons.
[Sabreen Kh. A. Ibraheim and A.
A. M. Mohsen.
Impact of Plant Spacing on Growth and Yield of Two Sweet
Pepper Cultivars. J Am Sci
2016;12(11):76-83].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
7. doi:10.7537/marsjas121116.07.
Key words:
Sweet pepper,
plant spacing, cultivars,
growth and yield. |
Full Text |
7
|
8
|
Nursing Intervention for
Enhancing Hemodialysis Patient Adherence to Therapeutic Regimen
Ghalia Elmoghazy Elkasaby
Elmoghazy1,
Salwa Abbas Ali Hassan1,
Amany Sobhy Sorour1 and Ahmad Farouk Donia2
1Community
Health Nursing, Faculty of Nursing, Zagazig University, Egypt
2Internal
Medicine Department, Nephrology Urology & Nephrology Center,
Mansoura University, Egypt
domtymo@yahoo.com
Abstract:
Adherence with the
prescribed medical regimen is a crucial factor for achieving
good therapeutic results in dialysis patients. Aim
The aim of this study is to evaluate the effectiveness of
hemodialysis patients' education in improving their adherence to
therapeutic regimens. Design: A quasi-experimental
research design. Setting: Two hemodialysis units
in Urology and Nephrology Center, Mansoura City. Sample:
A purposive sample (120 patients) was used. Tools:
An interview questionnaire and Adherence measures form.
Results: The study results revealed that a highly
statistically significant improvement in the study subjects’
knowledge about therapeutic regimen post program implementation
also, daily life activities were improved. Statistically
significant positive correlationswere found between scores of
knowledge, awareness, self-reported practices, willingness and
level of education. Conclusion:
Patients who were exposed to the
educational program showed improvement in their adherence to
therapeutic regimen and daily living activities.
Recommendations: Ongoing health education is highly
needed for the hemodialysis patients, and their care givers,
using a multitude of audiovisual materials that suit the needs
for each patient. A booklet contained information about
therapeutic regimen should be available in all units providing
hemodialysis.
[Ghalia Elmoghazy Elkasaby
Elmoghazy, Salwa Abbas Ali Hassan, Amany Sobhy Sorour and Ahmad
Farouk Donia. Nursing
Intervention for Enhancing Hemodialysis Patient Adherence to
Therapeutic Regimen.
J Am Sci
2016;12(11):84-93].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
8. doi:10.7537/marsjas121116.08.
Key words:
Adherence, non-adherence, therapeutic regimen, hemodialysis
patients. |
Full Text |
8
|
9
|
Impact of mix food colors
with Barly Water (Talbina) on some neurotransmitters in
different brain regions, biochemical and histological structure
of liver male albino rats
Bawazir A. E
Department of Zoology, King
Abdul-Aziz University Faculty of Science, Jeddah, K.S.A
ebawazir@kau.edu.sa
Abstract:
Many azo dye derivatives are used as food colorants has been
neurotoxic effects. The objective of current study is to
investigate the effect of chronic administration of mix Food
color with Barly Water on neurotransmitters contents in
different sides of brain. Particularly (cerebellum, striatum,
cerebral cortex, hypothalamus, brain steam and hippocampus).
Moreover, liver functions of male albino rats will be examined.
Results show that the daily oral intake of mix food colors lead
to decrease in the content of some neurotransmitters in brain
areas at the different time, this might have caused oxidative
stress leading to disturbances in neural function and decreased
synthesis of neurotransmitters in the presynaptic cell. The
daily oral intake of mix food colors with barly water caused a
significant increase in total content of neurotransmitters in
brain areas after treatment. In addition, the level of aspartate
aminotransferase (AST), alanine aminotransferase (ALT) and
alkaline phosphatase in rats oral administration with mix food
colors were significant increase in treated rate. Chronic oral
administration of mix food colors with barly water caused high
in the level of aspartate aminotransferase, alanine
aminotransferase and alkaline phosphatase in treated rate. The
present result in could be concluded that chronic oral
administration of barly water with mix food color showed that an
improvement in the tissue of liver. Finally, It was concluded
that barly water improve the damage resulting from chronic
intake of a mixture of food color due to its contains
antioxidant substances that have the ability to capture free
radicals.
[Bawazir
A. E. Impact of mix food colors with Barly Water (Talbina) on
some neurotransmitters in different brain regions, biochemical
and histological structure of liver male albino rats.
J Am Sci
2016;12(11):94-103].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
9. doi:10.7537/marsjas121116.09.
Key words:
food colors, barly water, some neurotransmitters, Brain regions.
liver function, male albino rats. |
Full Text |
9
|
10
|
Case Report H Syndrome
Abdullah Alshaya1, Sultan Alkhonaizan2,
Majed Alfadhl3, Fatemah Altamimi1, Ali
Almajhad4, Maher Alshami1, Badi Alenazi1,
and Mosleh Jabari5
1Department
of Pediatrics, Alyamamah Maternity and Children Hospital,
Riyadh, Saudi Arabia
2Department
of Dermatology, King Abdulaziz Medical City, Riyadh, Saudi
Arabia
3Department
of Pediatrics, King Abdulaziz Medical City, Riyadh, Saudi Arabia
4Department
of Dermatology, King Salman Hospital, Riyadh, Saudi Arabia
5Department
of Pediatrics, College of Medicine, Al-Imam Muhammad Ibn Saud
Islamic University, Riyadh, Saudi Arabia
dr.mus888@hotmail.com
Abstract: Background:
H syndrome is a monogenic systemic inherited form of
histiocytosis, with characteristic cutaneous findings
accompanying systemic manifestations. The major common endocrine
manifestations like hypogonadism, short stature and diabetes
mellitus with characteristic genodermatosis lead to the
diagnosis. Objective: To report a rare case of H
syndrome, an autosomal non autoimmune disorder in a three years
old Syrian boy who was presented with diabetes mellitus type
one, hyperpigmented hypertrichosis, hepatosplenomegaly, aortic
stenosis. Method: We described the clinical spectrum of H
syndrome with multisystem spectrum involvement, the solute
carrier family 29(nucleoside transporters), member 3(SLC29A3)
gene was screened for molecular diagnosis utilizing the NGS
based mutational analysis. Results: H-syndrome is caused
by a mutation in SLC29A3 gene which encodes for the human
equilibrative nucleoside transporter-3(hENT3). a 3 years old boy
who was diagnosed to have diabetes mellitus, his clinical
phenotype included hyperpigmented hypertrichosis,
hepatosplenomegaly, short stature, cardiac involvement, a
clinical diagnosis of H SYNDROME were suspected, and we
identified a reported homozygous pathogenic variant c.1279G^A(p.
Gly427ser)in the SLC29A3 gene by sequencing. Conclusion:
The characteristic pigmentary hypertrichosis and cardiac
involvement in diabetes mellitus patient raised the suspicion of
H syndrome. NGS with its multiplexing option offers a rapid and
robust platform for molecular diagnosis at an affordable cost.
[Abdullah Alshaya, Sultan
Alkhonaizan, Majed Alfadhl, Fatemah Altamimi, Ali Almajhad,
Maher Alshami and Mosleh Jabari.
Case Report H Syndrome.
J Am Sci
2016;12(11):104-105].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
10.
doi:10.7537/marsjas121116.10.
Keyword:
Syndrome. |
Full Text |
10
|
11
|
Effect of Friction Stir Welding Process Parameters and Post-Weld
Heat Treatment on the Microstructure and Mechanical Properties
of AA6061-O Aluminum Alloys
Mostafa. S. S. El-Deeb1, S. A. Khodir2,
Sayed A. Abdallah3, A. M.
Gaafer3 T. S. Mahmoud3
1Teaching Assistant, Department of Manufacturing Engineering and
Production Technology, Modern Academy for Engineering and
Technology, Cairo Egypt.
2Welding
Technology and Inspection Department,
Central Metallurgical Research and Development Institute,
Cairo, Egypt.
3
Mechanical Engineering Department, Shoubra Faculty of
Engineering, Benha University, Cairo, Egypt.
engmostafaeldeeb@yahoo.com
Abstract:
The aim of the present work is to study the effect of the
welding conditions and T4 and T6 post-weld heat treatments (PWHT)
on the microstructure and hardness values of AA6061-O aluminum
plates joined using friction stir welding (FSW). The welding was
conducting using three rotational speeds of 400, 500 and 630 rpm
and two welding speeds of 25 and 40 mm/min. After FSW, the
AA6061 joints were subjected to T4 and T6 heat treatments.
Microstructural characterization was examined using optical and
scanning electron microscope (SEM) equipped with energy
dispersive x-ray spectroscopy (EDS).
The results showed that the grain size of the stir zone
increased by increasing the rotational speed or by decreasing
welding speed. Hardness significantly
decreased as rotation speed increased and the values of
hardness for the welded joints after artificial aging (T6) are
greater than solution heat treatment (T4).
[Mostafa. S. S. El-Deeb, S. A.
Khodir, Sayed A. Abdallah, A. M.
Gaafer, T. S. Mahmoud.
Effect of Friction Stir Welding Process Parameters and Post-Weld
Heat Treatment on the Microstructure and Mechanical Properties
of AA6061-O Aluminum Alloys.
J Am Sci
2016;12(11):106-115].
ISSN 1545-1003 (print); ISSN 2375-7264
(online).
http://www.jofamericanscience.org.
11.
doi:10.7537/marsjas121116.11.
Keywords:
Friction stir welding, AA6061 aluminum alloy, microstructures
observations, Hardness measurement. |
Full Text |
11
|
The
manuscripts in this issue are presented as online first for
peer-review, starting from November 1, 2016.
All
comments are welcome:
editor@americanscience.org;
americansciencej@gmail.com,
or contact with author(s) directly.
For back issues of the Journal of American Science, click here.
Emails:
editor@americanscience.org;
americansciencej@gmail.com
|