oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 8 )

2019 ( 742 )

2018 ( 955 )

2017 ( 936 )

Custom range...

Search Results: 1 - 10 of 416368 matches for " Fahad M. Al-Hemaid "
All listed articles are free for downloading (OA Articles)
Page 1 /416368
Display every page Item
Molecular phylogenetic study of Luffa tuberosa Roxb. (Cucurbitaceae) based on internal transcribed spacer (ITS) sequences of nuclear ribosomal DNA and its systematic implication
Ajmal Ali M.,Karuppusamy S.,Fahad M. Al-Hemaid
International Journal of Bioinformatics Research , 2010,
Abstract: The phylogenetic position of long been debatable species Luffa tuberosa was inferred in thepresent study using ITS sequence of nuclear ribosomal DNA data. The study sampled a total number of 16accessions which include five accessions of Luffa (under four species i.e. Luffa acutangula, L. cylindrica, L.aegyptiaca and L. tuberosa), nine accessions of Momordica (under eight species i.e. M. angustisepala, M.balsamina, M. cabraei, M. charantia, M. charantia subsp. macroloba, M. cissoides, M. cochinchinensis, M.dioica and M. foetida) and two accessions of Trichosanthes under two species (i.e. T. lepiniana and T.tricuspidata). The sequence data analysis clearly reveals nesting of Luffa tuberosa within the clade ofMomordica, thus, we herein support the inclusion of Luffa tuberosa into the genus Momordica as M.tuberosa (Roxb.) Cogn.
Assessing Molecular Signature for Some Potential Date (Phoenix dactylifera L.) Cultivars from Saudi Arabia, Based on Chloroplast DNA Sequences rpoB and psbA-trnH
Fahad Al-Qurainy,Salim Khan,Fahad M. Al-Hemaid,M. Ajmal Ali,M. Tarroum,M. Ashraf
International Journal of Molecular Sciences , 2011, DOI: 10.3390/ijms12106871
Abstract: Phoenix dactylifera L. (date palm), being economically very important, is widely cultivated in the Middle East and North Africa, having about 400 different cultivars. Assessment of date cultivars under trading and farming is a widely accepted problem owing to lack of a unique molecular signature for specific date cultivars. In the present study, eight different cultivars of dates viz., Khodry, Khalas, Ruthana, Sukkari, Sefri, Segae, Ajwa and Hilali were sequenced for rpoB and psbA-trnH genes and analyzed using bioinformatics tools to establish a cultivar-specific molecular signature. The combined aligned data matrix was of 1147 characters, of which invariable and variable sites were found to be 958 and 173, respectively. The analysis clearly reveals three major groups of these cultivars: (i) Khodary, Sefri, Ajwa, Ruthana and Hilali (58% BS); (ii) Sukkari and Khalas (64% BS); and (iii) Segae. The economically most important cultivar Ajwa showed similarity with Khodary and Sefri (67% BS).The sequences of the date cultivars generated in the present study showed bootstrap values between 38% and 70% so these sequences could be carefully used as molecular signature for potential date cultivars under trading and selection of genuine cultivars at the seedling stage for farming.
Zinc Oxide Nanorods Prepared in Mixed Solvents  [PDF]
Mohammad Ashraf Shah, Fahad M. Al-Marzouki
Materials Sciences and Applications (MSA) , 2010, DOI: 10.4236/msa.2010.12014
Abstract: In this paper, we demonstrate a novel and direct synthesis of hexagonal-shaped zinc oxide (ZnO) nanorods at very low temperature of ~ 80oC simply by using metallic zinc foil and de-ionized (DI) water with few drops of ethanol. The formation of ZnO structures by the reaction of metals with DI water is suggested to occur due to the oxidation of metallic zinc in presence of water. The synthesized ZnO products were characterized in terms of their structural and optical properties. By the morphological investigations using FESEM, it was observed that the grown products are hexagonal-shaped ZnO nanorods with the diameters in the range of 50-60 nm and length with ~ 1 micrometer. The EDS and XRD pattern confirmed the composition and crystallinity of the grown nanorods and revealed that the grown products are pure ZnO with the wurtzite hexagonal phase.
Obesity in Relation to Ovarian Response in IVF Treatment  [PDF]
Howaida Hashim, Mahmoud Gehad, Badawi Khalid, Fahad Al Salman, Samar Hassan, Afaf Felemban, Haya Al Fozan, M. Al Bugnah
Advances in Reproductive Sciences (ARSci) , 2018, DOI: 10.4236/arsci.2018.62005
Abstract: Introduction: The effect of Body Mass Index (BMI), which reflects the woman’s obesity, in IVF treatment cycle, remains unclear. In 1997, the World Health Organization (WHO) provided authoritative refinements to the over-weight terminology and BMI cutoffs [1]. Objective: To verify the relationship between BMI and ovarian response in IVF treatment cycle. Design: Retrospective study. Materials & Methods: The study includes 2625 IVF treatment cycles performed in our IVF center in the period of 4 years. Patients were divided into five groups using the WHO criteria according to their BMI [2]. Cancellation rate, mean last E2 before hCG administration, mean endometrial thickness, mean duration of stimulation, number of eggs retrieved, fertilization rate, pregnancy and abortion rates were analyzed. The unpaired t-test was used in statistical analysis. Results: There was statistically significant less mean oestradiol level prior to hCG, less endometrial thickness and less number of simulation days as BMI gets higher. In contrast, there was a positive relationship between cancellation rate and higher BMI except with BMI >39 which was not, possibly due to lower number of patients available. But if we look at the cause of cancellation, it was 100% due to insufficient number of follicles obtained for this group (BMI >39). Also, days of stimulation are significantly lower for the same group of patients in comparison with the other groups. Retrieval, fertilization and pregnancy rates were not significant between all groups. Abortion rate gets significantly higher as BMI increased. Conclusion: Overweight affects ovulation, if we consider the cause of cancellation being insufficient number of follicles reflects the poor response. The fertilization and pregnancy rate were not affected once oocytes retrieved. The reduction of weight is an important part of infertility treatment in obese women with regards to the ovarian response and abortion rate in IVF cycle.
Chemical composition of acid lime leaves infected with Candidatus Phytoplasma aurantifolia  [PDF]
Rashid Al-Yahyai, Ali Al-Subhi, Jamal Al-Sabahi, Fahad Al-Said, Khadija Al-Wahaibi, Abdullah M. Al-Sadi
Agricultural Sciences (AS) , 2014, DOI: 10.4236/as.2014.51007
Abstract:

The production of acid lime (Citrus aurantifolia) has declined in many parts of the world due to phytoplasmal infection by “Candidatus Phytoplasma aurantifolia”. The resulting Witches’ Broom Disease of Lime (WBDL) causes stem and leaf proliferation and clustering that starts on a few branches and continues to spread until trees are killed within 5-7 years. Recent studies have shown that Phytoplasma alters the chemical composition of leaves. Leaves from WBDL-symptomatic lime trees were collected to determine their volatile compound composition. Phytoplasmal infection was confirmed by a polymerase chain reaction (PCR) assay using primers P1/P7 and R16F2n/R16R2 in direct and nested PCR, respectively. Restriction fragment length polymorphism (RFLP) profiles of acid lime Phytoplasma were identical with those of WBDL Phytoplasma. The phytochemical composition of symptomatic (infected) and asymptomatic (healthy) leaves of acid lime were determined using GC-MS analysis of steam distilled extract. The WBDL-symptomatic leaves had higher concentration in ?-limonene, β-ocimene and trans-caryophyllene and a reduction in other compounds (i.e. citral, citronellal, cisverbenol, neryl acetate, and linalool). Variations in the leaf phytochemical concentration indicate a possible role in the development of the WBDL disease symptoms.

Environmental Distribution of Clay Minerals in North West Subiyah Area, Kuwait: Compositional Variation and Application  [PDF]
Ahmed M. Dakrory, Ahmad Rashed Al Rashed, Fahad A. H. Alkandari
International Journal of Geosciences (IJG) , 2018, DOI: 10.4236/ijg.2018.93012
Abstract:
The main objective of this paper is to study the mineralogical composition and the environmental conditions of the Subiyah clay to be used for crafting pottery and technological behaviour that allows the evaluation of the applicability of the clay deposits in manufacturing new ceramic products at Kuwait. This research could help artists, crafters of potters, and ceramic manufactures in Kuwait to depend on inland clay and this makes it easier for more production in ceramic and pottery in the future. All this could enhance the cultural of ceramic in teaching or producing it in Kuwaitfor the first time. For that purpose, six stations were selected at North-eastern part (Subiyah area) of Kuwait for clay investigation. X-ray Diffraction method (XRD) was led to identify mineralogical composition of samples; S1, S2, S3, S4A, S4B, and S6 were quartz, Calcite (Caco3), Dolomite, Illite and Clinochlore. Whereas; Quartz, Calcite Dolomite, Palygorskite, Nontronite and Clinochlore were recorded at S5 and S7. Clay mineralogical and environmental studies at our study area proved that, crafter can depend on Subiyah clay better than importing it from abroad.
New Records of Eriophyoid Mites (Acari: Prostigmata: Eriophyoidea) from Saudi Arabia
Fahad J. Al-Atawi,Alaa M. Halawa
Pakistan Journal of Biological Sciences , 2011,
Abstract: A field study was conducted to investigate eriophyoid mites associated with some fruit trees in Riyadh, Saudi Arabia. The survey was carried out in four localities (El-Waseel, Al-Beer, Al-Haiyer and El-Deriya) and included seven species of fruit trees, namely olives (Olea europea), fig (Ficus carica), grapes (Vitis vinifera), apple (Malus domestica), citrus (Citrus spp.), pomegranate (Punica granatum) and pear (Pyrus communis). Seven new records of eriophyoid species (Aceria benghalensis Soliman and Abou-Awad, A. olivi Zaher and Abou-Awad, Caleptrimerus baileyi K., Colomerus oculivitis (Attiah), Oxycenus niloticus (Zaher and Abou-Awad), Rhynchaphytoptus ficifolia (Keifer) and Tegolophus hassani (Keifer)), belonging two families, Eriophyidae and Diptilomiopidae, were collected from four species of fruit crops covering four different production localities in Riyadh. An illustrated identification key for these mites is provided. The present study is the first scientific study on Saudi eriophyoid mites.
Effectiveness of Copepod, Acanthocyclops vernalis on Dengue Fever Victor, Aedes aegypti under Laboratory Conditions in Jeddah, Saudi Arabia  [PDF]
Ahmed M. Alshammari, Abdullah S. Alshammari, Adel A. Abdelmageed, Ashraf A. Mangoud, Naimah A. Al Anazi, Fahad S. Al-Zahrani
Open Journal of Ecology (OJE) , 2015, DOI: 10.4236/oje.2015.57024
Abstract: A. aegypti, the primary carrier for dengue viruses that cause dengue fever and are widespread over large areas of the tropics and subtropics. The copepod, Acanthocyclops vernalis was collected from a pond located in Hail, a city in northwestern Saudi Arabia. A. aegypti colonies established from Laboratory of Public Health Pests, Jeddah Municipality, Jeddah, Saudi Arabia. In the laboratory, the predatory capacity of copepod predator A. vernalis tested on first and second instars of Aedes aegypti. A single adult female of A. vernalis was tested against 50 larvae of A. aegypti in case the presence and absence of an alternative food. Several doses of A. vernalis (10, 15, 20 and 25 adults) against 100 larvae of mosquito were tested also in case the presence and absence of an alternative food under laboratory conditions.
Applicability of Dimedone Assays for the Development of Online Aldehyde Sensor in Seawater Flooding Systems  [PDF]
Mohammed A. Al-Moniee, Cees Koopal, Naim Akmal, Sjaak van Veen, Xiangyang Zhu, Peter F. Sanders, Peter F. Sanders, Fahad N. Al-Abeedi, Ayman M. Amer
Journal of Sensor Technology (JST) , 2016, DOI: 10.4236/jst.2016.64008
Abstract: Biocides are oilfield chemicals that are widely used to control bacterial activity throughout the oil industry. A feasibility study has been explored to develop detection techniques for biocide batch treatments, preferably on-line and in real-time, for their potential use in seawater flooding system. Several methods to measure key components of the biocide formulation were investigated and reported in previous study [1]. The enzymatic activity of an immobilized acetylcholine esterase (AChE) on the column material was successfully inhibited by some model compounds, but not by the actual biocides commonly used in Saudi Aramco seawater flooding system. In this paper, an alternative assay for biocide detection in the Saudi Aramco seawater flooding system was investigated for its applicability for the development of on-line biocide sensor. The assay was based on the detection of aldehyde functionality in the biocide mixture through measurement of a fluorescent derivative formed in the reaction of aldehyde groups and dimedone in the presence of ammonium acetate. The reaction of aldehyde groups with dimedone was demonstrated in seawater matrix, and the formed fluorescent product was successfully measured. The results showed that the dimedone-based assay was very sensitive, and relatively straightforward to perform. The ruggedness test also indicated that the assay is sensitive to minor changes of various specific conditions of the method. It is concluded that the dimedone assay is suitable for further development of a real-time biocide monitoring system to detect the presence of biocide slugs in seawater flooding system. The development of an automated on-line biocide sensor based on dimedone assay is underway.
Quality of Life among Saudi Diabetics  [PDF]
Fahad S. Al-Shehri
Journal of Diabetes Mellitus (JDM) , 2014, DOI: 10.4236/jdm.2014.43032
Abstract:

Aim of study: To assess QOL among Saudi diabetics and to identify the possible risk factors associated with lower QOL. Patients and Methods: This study comprised 400 diabetic patients attending the Diabetes Clinic at theUniversityDiabetesCenterinRiyadh. They were interviewed using the Audit of Diabetes Dependent QOL (ADDQOL). Results: Most diabetic patients (78.7%) had negative (i.e., unfavorable) ADDQOL scores. Diabetic patients' age, education and occupation were not significantly associated with their QOL. Female patients had significantly worse QOL than male patients (p = 0.026). Married patients had significantly worse QOL compared with non-married patients (p = 0.012). Patients with type 2 diabetes had significantly worse QOL than those with type 1 diabetes (p = 0.029). Duration of diabetes was not significant factors as regard their QOL, with the worst QOL among those with more than 20 years of diabetes. The degree of diabetes control was significantly and directly associated with QOL score (p < 0.001). The worst QOL was expressed among poorly controlled diabetes while the best was among patients with excellent control. QOL of diabetics was less among those who had diabetes complications, i.e., neuropathy (p = 0.03), retinopathy (p < 0.001), and diabetic foot (p = 0.031). However, difference was not significant according to those with nephropathy. Conclusions: QOL of Saudi adult diabetic patients is not favorable. Personal characteristics associated with worse QOL among diabetics include female gender, and being married. Disease characteristics associated with worse QOL include being a type 2 diabetic and those with uncontrolled diabetes. Main complications associated with worse QOL among diabetics include retinopathy, diabetic foot and neuropathy.

Page 1 /416368
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.