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Search Results: 1 - 10 of 600395 matches for " Ohoud N. A. Al-Zaidi "
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Cyclocondensation Reactions of Hydrazonoyl Chlorides with Some Azines: Synthesis of New Fused Heterocycles of Expected Microbiological Activity  [PDF]
Mosselhi A. M. Mohamed, Liala M. B. Abu-Alola, Ohoud N. A. Al-Zaidi, Hosam A. H. Saad
International Journal of Organic Chemistry (IJOC) , 2017, DOI: 10.4236/ijoc.2017.71002
Abstract: New functionalized fused heterocycles, such as, 1,3,6,9,11-pentasubstituted-pyrido[3,2-f:6,5-f']bis([1,2,4]triazolo[4,3-a]-pyrimidin-5(1H)-ones (6) and 1,3-disubstituted-7-[(E)-2-(thiophen-2-yl)ethenyl]-1,4,9,9a-tetrahydro-6H-[1,2,4]triazino[4,3-b][1,2,4,5]-tetrazin-6-ones (16) were synthesized via reaction of the hydrazonoyl chlorides (1) with 1,3,6-triphenyl-9-thioxo-9,10-dihydro-pyrimido [4,5-b]pyrido[4,5-d][1,2,4]triazolo[4,3-a]pyrimidin-5,7(1H,8H)-di-one (5) and 4-amino-6-[(2-thiophen-2-yl)ethenyl]-3-thioxo-3,4-dihydro-[1,2,4]triazin-5(2H)-one (11), respectively. The mechanism and the regioselectivity of the studied reactions have been discussed. The biological activity of the products has been evaluated against some fungi and bacteria species. The tested compounds exhibited moderate activity against the bacteria species.
Fabrication and Characteristics of Fast Photo Response ZnO/Porous Silicon UV Photoconductive Detector  [PDF]
Hanan A. Thjeel, Abdulla. M. Suhail, Asama N. Naji, Qahtan G. Al-zaidi, Ghaida S. Muhammed, Faten A. Naum
Advances in Materials Physics and Chemistry (AMPC) , 2011, DOI: 10.4236/ampc.2011.13012
Abstract: Fast response time UV photoconductive detector was fabricated based on ZnO film prepared by thermal chemical spray pyrolysis technique. The ZnO nanofilms are grown on the porous silicon (PS) nanosurface which has drastically reduced the response time of the ZnO UV detector from few seconds to few hundreds of microseconds. The surface functionalization of the ZnO film deposited on porous silicon (PS) layer by polyamide nylon has highly improved the photoresponsivity of the detector to 0.8 A/W. The normalized de-tectivity (D*) of the fabricated ZnO UV detector at wavelength of 385 nm is found to be about 2.12 × 1011 cm Hz1/2 W–1. The ZnO film grown on the porous silicon layer was oriented in the c-axis and it is found to be a p-type semiconductor, which is referred to the compensation of the excess charge carriers in the ZnO film by the nanospikes silicon layer.
The Association Between Body Mass Index, Lipid Profile and Serum Estradiol Levels in a Sample of Iraqi Diabetic Premenopausal Women
Zinah Abd Ulelah Abd Ali,Mahmood Shakir Al-Zaidi
Oman Medical Journal , 2011,
Abstract: Objectives: To evaluate the association between body mass index (BMI), serum lipid profile and estradiol level in a sample of Iraqi diabetic premenopausal women at their pre ovulatory period.Methods: A total of 155 diabetic female patients aged between 20-45 years, were enrolled in this study, which was conducted in Al Khademiyia Teaching Hospital from July 2008 to January 2010. Venous blood samples were taken, each serum sample was analyzed for total cholesterol, triglycerides, high density lipoprotein - cholesterol (HDL-C), low density lipoprotein - cholesterol (LDL-C), fasting glucose, insulin and estradiol. Body weight and height were measured for all patients included to calculate their Body Mass Index.Results: The age of diabetic patients was 29.7 ± 4.3 years and BMI was 28.3 ±5.84 kg/m2. Fifty patients had normal BMI, while 50 patients were overweight and 55 were obese. The study revealed a positive association between obesity, triglycerides and LDL-C and a negative association between serum estradiol, obesity and LDL-C.Conclusion: Iraqi diabetic pre menopausal women at their pre ovulatory period exhibit a pro-atherogenic risk profile because of their abnormal BMI, higher LDL-C, lower HDL-cholesterol and estradiol level.
Palladium – Doped ZnO Thin Film Hydrogen Gas Sensor
Qahtan Ghatih Al-zaidi,Abdullah Muhsin Suhail,Wasan Rashid Al-azawi
Applied Physics Research , 2011, DOI: 10.5539/apr.v3n1p89
Abstract: Palladium – doped ZnO thin film was deposited by chemical spray pyrolysis on glass substrate to be a fast hydrogen gas sensor. The prepared ZnO films were doped by dipping in palladium chloride PdCl2 dissolved in ethanol C2H5OH. The optical properties and the surface morphology of the prepared films were studied. The sensitivity and response time behaviors of the ZnO – based gas sensor to hydrogen gas were investigated. The film sensitivity dependence on the temperature and test gas concentration were tested and the optimum operation temperature was determined at around 280 oC. The response time of 2-3 s of the doped ZnO film was highly improved compared to the slow response of few minutes of the traditional ZnO hydrogen gas sensors.
Influence of some Genetic and Non-Genetic Factors on Total Milk Yield and Lactation Period in Iraqi Awassi Sheep
Firas Rashad Al-Samarai, Yehya Khalid Abdulrahman, Fatten Ahmad Mohammed, Falah Hamad Al-Zaidi, Nasr Nouri Al-Anbari
Advances in Animal and Veterinary Sciences , 2014, DOI: 10.14737/journal.aavs/2014/2.12.662.667
Abstract: This study was conducted to evaluate productivity of Awassi sheep raised at the Research Station of Sheep and Goats/ Abo Gharib/West of Baghdad/Iraq. A total of 369 milk records of the Awassi ewes collected during year of 2008 were used to investigate the effect of non-genetic factors (parity, group of dam, month of birth, type of birth and sex) on total milk yield (TMY), and lactation period (LP). Data were analyzed by using GLM in SAS program. Restricted Maximum Likelihood Estimation method (REML) was used to estimate heritability (h2) for milk yield an lactation period. Best Linear Unbiased Predication (BLIP) values were estimated for rams. Results revealed that total milk yield (TMY) and lactation period (LP) were 103.57±3.63kg and 107.44±1.47 respectively. LP affected significantly (P < 0.01) by parity, group of dam (local and Turkish), month of birth and type of birth (single and twin), while the sex of birth was not significant. TMY was affected significantly (P < 0.01) by the same factors except the parity and sex of birth, which were not significant. Estimates of heritability for TMY and LP were 0.40 and 0.30 respectively. BLUP values of rams for total milk yield were between -33.61and 31.00 kg. These results point to a high genetic potential of Awassi sheep. Hence, it is imperative to apply selection programs to improve the productive performance of Awassi sheep in Iraq.
Sugar-sweetened carbonated beverage consumption correlates with BMI, waist circumference, and poor dietary choices in school children
Kate S Collison, Marya Z Zaidi, Shazia N Subhani, Khalid Al-Rubeaan, Mohammed Shoukri, Futwan A Al-Mohanna
BMC Public Health , 2010, DOI: 10.1186/1471-2458-10-234
Abstract: 5033 boys and 4400 girls aged 10 to 19 years old participated in a designed Food Frequency Questionnaire. BMI and W_C measurements were obtained and correlated with dietary intake.The overall prevalence of overweight and obesity was 12.2% and 27.0% respectively, with boys having higher obesity rates than girls (P ≤ 0.001). W_C and BMI was positively correlated with sugar-sweetened carbonated beverage (SSCB) intake in boys only. The association between male BMI and SSCB consumption was significant in a multivariate regression model (P < 0.0001). SSCB intake was positively associated with poor dietary choices in both males and females. Fast food meal intake, savory snacks, iced desserts and total sugar consumption correlated with SSCB intake in both boys (r = 0.39, 0.13, 0.10 and 0.52 respectively, P < 0.001) and girls (r = 0.45, 0.23, 0.16 and 0.55 respectively, P < 0.001). Older children reported eating significantly less fruit and vegetables than younger children; and less eggs, fish and cereals. Conversely, consumption of SSCB and sugar-sweetened hot beverages were higher in older versus younger children (P < 0.001). BMI and W_C were negatively correlated with hours of night-time sleep and exercise in boys, but only with night time sleep in girls, who also showed the lowest frequency of exercise.A higher intake of SSCB is associated with poor dietary choices. Male SSCB intake correlates with a higher W_C and BMI. Limiting exposure to SSCB could therefore have a large public health impact.The prevalence of overweight and obesity amongst children in Saudi Arabia has previously been reported to be between 8-14% and 6-17% respectively [1,2]. Several studies suggest that these levels are rising alarmingly [3,4]. Obesity is a risk factor for cardiovascular disease [5], Diabetes [6] and certain types of cancer [7]. It can also be associated with non-fatal but debilitating illnesses such as respiratory difficulties, infertility and musculoskeletal disorders [8]. Additiona
Nucleosides 10: Synthesis of New Derivatives of Pyrimidine and Fused Pyrimidine Nucleosides of Expected Biological Activity  [PDF]
Laila M. Break, Mosselhi A. M. Mohamed, Ohoud A. A. Al-Thubaiti, Fatma E. M. Eibaih
International Journal of Organic Chemistry (IJOC) , 2019, DOI: 10.4236/ijoc.2019.93010
Abstract: Pyrimidines, such as 6-amino-2-thio and 2-methylthiouracils and fused pyrimidines, such as thienopyrimidines reacted with 1-O-acetyl-2,3,5-tri-O- benzoyl-β-D-ribofuranose to get new derivatives of the corresponding nucleosides. The obtained protected nucleosides were deprotected by methanolic sodium methoxide to get the corresponding free uracil and thienopyrimidine nucleosides. The new nucleosides formed were tested for biological activity against some of microorganism (some fungi and bacteria species). Some of the tested products showed moderate activity and the results were reported.
Elemental Compositions of Some Eye Shadow Products Marketed in Saudi Arabia  [PDF]
Faten M. Ali Zainy, Fatima Bannani, Ohoud A. Alotaibi
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2018, DOI: 10.4236/jcdsa.2018.84024
Abstract: This study focuses on the determination, as well as, the composition of some heavy metals contained in 12 eye shadow cosmetic samples. An elemental analysis of heavy metals (Ti, Cr, Fe, Ni, Cu, Co, Mn, Pb, and Zn) was performed by X-ray Fluorescence. The constitution of some samples was studied by Powder X-Ray Diffraction. Heavy metals exist as zinc oxide, Titanium dioxide, Iron oxide, Bismuth oxychloride, and lead sulfide. The quantification of selected toxic heavy metals lead, copper and nickel were achieved by Inductively Coupled Plasma-Optical Emission Spectrometry after digestion with concentrated acids. In all analyzed samples lead had a concentration less than 20 ppm, which indicated good manufacturing practice. Copper and nickel levels were within acceptable concentrations, but overpasses the safe limit appeared in China samples. The prolonged use of cosmetics case an allergic problem for consumers. Therefore, quality controls are highly controlled for imported products with different regulations.
Problems of the Program for Teaching Female Deaf Students at the College of Education for Home Economy and Technical Education at the University of Princess Noura Bint Abdulrahman in Riyadh  [PDF]
Ohoud Alshamsan
Open Journal of Social Sciences (JSS) , 2017, DOI: 10.4236/jss.2017.59007
Abstract: The researcher tried to discuss the problems related to female deaf students. The title of the study is “Problems of the Program for Teaching Female Deaf Students at the College of Education for Home Economy and Technical Education at the University of Princess Noura Bint Abdulrahman in Riyadh”. In order to identify the program problems, the researcher, Ohoud Alshamsan, tried to answer the following research question: what are the problems of programs for teaching female deaf students (FDS) at the college of education for home economy and technical education (CEHETE) at the University of Princess Noura Bint Abdulrahman in Riyadh? Research Population: The population of the study consisted of the teaching staff and FDS at the CEHETE in the University of Princess Noura Bint Abdulrahman in Riyadh. The population of the study consisted of 38 members of the teaching staff and 25 participants of the FDS. The study sampling included the afore-mentioned population, which comprises of 33 teaching staff and 20 FDS. Methodology: The researcher used the descriptive analytical approach and a questionnaire for data collection in answering the main question of the study. The data were analyzed and categorized using the SPSS program which yielded to the following results: Results of the Study: 1) There are no statistically differences at level 0.05 in the attitudes of the interviewees towards the FDS problems. 2) There are no statistically differences at level 0.05 in the attitudes of the interviewees with respect to the FDS academic problems. 3) There are no statistically differences at level 0.05 in the attitudes of the interviewees towards the FDS administrative problems. Main Recommendations: Based on the results of the study, the following recommendations emerged: 1) Recruiting more special education female teachers with specialization in “deaf handicapped education”. 2) Recruiting more special education female teachers with specialization in “sign language”. 3) Cooperating with societies concerned with these programs should be resorted to compensate for lack of specialist in this vital area. This kind of cooperation is likely to strengthen higher education programs for teaching deaf and weak hiring female students. 4) Signing contracts with female teacher specializing in deaf education or with female interpreters specializing in sign language.
Endometrial Sampling Performed by Gynecological Residents in Training  [PDF]
Osama Sadkeak Bajouh, Ohoud Al-Shamrany, Ahmad H. Abduljabbar, Hassan S. O. Abduljabbar
Open Journal of Obstetrics and Gynecology (OJOG) , 2014, DOI: 10.4236/ojog.2014.44030

Objectives: Endometrial sampling became the first choice in screening endometrial pathology. The technique is accurate and simple. The aim is to evaluate the use of endometrial sample in outpatients’ clinic as a routine by LEVEL of gynecological resident in training. Methods: A retrospective study of 463 patients seen by the residents at KAUH. A detailed history was obtained from medical records file. Reasons for endometrial sampling were divided into 6 categories, including screening, PMB, Menorrhagia or AUB, bulky uterus and cervical lesion. Endometrial sample was obtained using Pipelle. Results: Out of 463 patients, 128 had en-dometrial sampling as screening (27.6%), 84 had PMB (18.1%), 91 Menorrhagia (19.7%), 108 AUB (23.3%), 20 bulky uterus (4.3%) and 32 cervical lesion (6.9%). In 30% of cases the sample insufficient, diagnosis in 54.2% benign, endometrial hyperplasia (6.0%) 19 diagnosed (endometrial cancer) (4.1%) in (5.6%) had endometritis. 70% of patients saved had a D&C. Conclusion: Endometrial biopsy is found to be accurate, easy, and safe and can be done by LEVEL of gynecological residents, accuracy of 70% of cases, additional endometrial assessment undertaken if diagnosis is not made.

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