IUG Journal of Natural Studies最新文献

{"title":"CHARACTERIZATION OF DISKCYCLIC OPERATORS","authors":"","doi":"10.33976/iugns.29.1/2021/4","DOIUrl":"https://doi.org/10.33976/iugns.29.1/2021/4","url":null,"abstract":"In this article we discuss an interesting idea related to characte rization of diskcyclicity phenomena. We use the Diskcyclic Crit erion to characterize the subsets Γ of ℂ for which the notion of Γ-supe rcyclicity coincides with the notion of diskcyclicity. In particular , we give a complete description of the subset Γ. The necessi ty and sufficiency conditions on the subset Γ were prese nted. Some examples were exhibited to illustrate the proofs and the relationship among different classes of the operators.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115681160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bayesian Inference on the Generalized Gamma Distribution using Conjugate Priors","authors":"Mohamed I Riffi, Hanin S. El-Masri","doi":"10.33976/iugns.28.2/2020/1","DOIUrl":"https://doi.org/10.33976/iugns.28.2/2020/1","url":null,"abstract":"This paper focuses on the three-parameter generalized gamma distribution and uses Bayesian techniques to estimate its parameters. Many authors con-sidered estimating the parameters of the generalized gamma distribution in a Bayesian framework using Jeffrey’s priors. Others used different loss functions and the least squares approach. This study uses Bayesian techniques to estimate the three-parameter generalized gamma distribution by using conjugate priors. The random Metropolis algorithm is used to simulate the Bayesian estimates of the three parameters. Then these estimates are compared to the maximum like-lihood estimates using the mean error through simulation. It has been shown in this paper that the obtained estimates using this approach is more accurate than the traditional methods of estimation such as the Maximum likelihood method. The same approach is then used to estimate the parameters of mixtures of the generalized gamma parameters using conjugate priors.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123781678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In vitro Anticancer Activity Effect of Extracellular Metabolites of Some Bacterial Species on HeLa Cell Line.","authors":"Islam Abdelraouf Elmanama, A. Elmanama, M. Zaharna, Mariam R. Al-Reefi","doi":"10.33976//iugns.28.2/2020/2","DOIUrl":"https://doi.org/10.33976//iugns.28.2/2020/2","url":null,"abstract":"Background: Cancer is still one of the most serious problems that affect human health. Despite the intense efforts to develop treatments, effective agents are still not available. In some cases, conventional therapy could be harmful or fail because of emerging drug resistance. Therefore, the development of novel therapies against cancer is of utmost importance. Assessment of anticancer effects of bacterial metabolites on cancer cells may help in the process of finding new cheap, reliable, contentious and safe cancer therapy.\u0000\u0000Objective: To determine the anticancer effect of the extracellular metabolites of eight bacterial species on HeLa cell line.\u0000\u0000Methodology: Extracellular metabolites were prepared by isolating and culturing eight bacterial species (Escherichia coli, Staphylococcus aureus, Micrococcus, Pseudomonas aeruginosa, Lactic acid bacteria, Klebsiella, Proteus and E. coli with its phage) in liquid media. Tubes were incubated overnight and centrifuged. Supernatant was filtered and concentrated using Infra-Red concentrator. Different concentrations were prepared and their anticancer effect were evaluated using MTT cell proliferation assay.\u0000\u0000Results: Results showed variation among the eight bacteria concerning proliferation inhibition against HeLa cells in a time and concentration dependent manner. Pseudomonas and E. coli with its phage revealed considerable anticancer activity with 63% and 86% inhibitory effects (both at 1000 µgml) and IC50 of 301 and 1395 µg/dl at 24h respectively. While Proteus and Micrococcus showed low inhibitory effects and S. aureus enhanced the proliferation of HeLa cells at low concentrations.\u0000\u0000Conclusion: Among the tested bacteria, Pseudomonas and E. coli and its phage gave the best anticancer inhibitory effects against HeLa cells. Further studies using purified components of effective bacteria are recommended.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131074387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antifungal susceptibility pattern of Candida spp. isolated from vaginal discharge of pregnant women","authors":"A. Elmanama, Mariam R. Al-Reefi, Basma R Al Hag Ahmad, L. A. Najjar, Sojoud S Abu Eita","doi":"10.33976/iugns.28.1/2020/07","DOIUrl":"https://doi.org/10.33976/iugns.28.1/2020/07","url":null,"abstract":"Vaginal candidiasis is common fungal infections among pregnant women. The aim of this study is to determine antifungal susceptibility pattern of Candida spp. isolated from vaginal discharge and to investigate possible risk factors associated with Candida infection. One hundred high vaginal swabs were collected from pregnant women complaining from abnormal discharge from various clinics in Gaza city, during 2019. Samples were plated on Sabouraud Dextrose Agar supplemented with chloramphenicol. Candida isolates were identified to the Genus level based on cultural and morphological characteristic. The susceptibility to seven antifungals was determined using disc diffusion method. Demographic, environmental, behavioral and other possible risks factors associated with vaginal candidiasis were recorded through an interview with patients before collecting the vaginal swabs and after obtaining a verbal consent. Data analysis was done using the SPSS software. Candida spp. was isolated from 43% of vaginal swabs of pregnant women with discharge. Variations existed in the susceptibilities of the different Candida isolates to antifungals. Amphotericin B the most effective with 0% resistance followed by itraconzaol and nystatin with 9.4% resistance. Resistance to miconazole, ketoconazole, voriconazole and fluconazole was 11.6%.  Statistically significant symptoms associated with positive Candida spp. cultures among pregnant women included; redness of vaginal area, secretions, yeast-like smell, urinary urgency, low sexual desire, itching and irritation (p ≤ 0.05). No statistical significance difference with regard to burning urinary sensation and painful intercourse. Candida spp. was isolated from 43% of vaginal swabs from pregnant women. Risks factors should be minimized by patient education and routine testing of pregnant women.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131533595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Iron status parameters in preeclamptic women in Gaza, Palestine","authors":"A. Altaher, A. E. Y. El-Ottol, A. Hatab, Abdullah M. Alagh, Khader J. Abu Taha, Mohammed T Khafaja","doi":"10.33976/iugns.28.1/2020/05","DOIUrl":"https://doi.org/10.33976/iugns.28.1/2020/05","url":null,"abstract":"Preeclampsia (PE) is a turmoil in the pregnancy appeared with the onset of hypertension and considerable amount of proteinuria. Extra serum iron is a causative component of oxidative stress concerned in the pathogenesis of preeclampsia. This study is a case control, conducted in 2018, and aimed to determine the iron status in preeclamptics as compared to normotensive pregnancies in Gaza strip. About 100 pregnant women with gestational age between 26 to 36 weeks. Fifty of them were preeclamptics and an equal number were without preeclampsia, aged between 18 to 35 years. Interview questionnaires were used to take sociodemographic and clinical data. Anthropometric evaluation and biochemical analysis were conducted. The SPSS version22 was used for data analysis. There was no statistically difference in the gestational age, gestational number and hemoglobin levels in the cases and controls (p≥ 0.05). In contrast, the body mass index (BMI), systolic, diastolic blood pressure (BP), and uric acid (UA) levels were significantly higher in preeclamptics (P<0.001). As well, the majority of cases were have +2 proteinuria on dipstick testing. Further, serum iron and ferritin levels were significantly higher in preeclamptics. On the other hand, ferritin levels had significant direct correlations with gestational number, previous preeclampsia, BMI, systolic BP, diastolic BP, UA, and proteinuria (P<0.05). Likewise, Iron had significant direct correlation with proteinuria (P<0.05). Preeclamptics have higher hematological parameters levels (iron & ferritin) as compared to normotensive women. However, Iron status of preeclamptic women should be assessed before giving iron supplements as these may cause more harm than benefit.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131047265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Some Pesticides on Tilapia nilotica and Daphnia magna Life","authors":"Y. El-Nahhal, S. Hams","doi":"10.33976/iugns.28.1/2020/04","DOIUrl":"https://doi.org/10.33976/iugns.28.1/2020/04","url":null,"abstract":"Application of pesticides creates hazards to the aquatic organisms. This study aimed to determined influence of bromacil, thiabendazole, malathion and mixtures of it on Tilapia nilotica (fish) and D magna . Effects included determination of mortality rate, losing sensation and behavior change (jump attempts) of fish and mortality rate for D. magna using concentration range from 0-6 mg/l. Normal growth of fish and D. Magana was observed under suitable laboratory conditions. The most toxic compound to D. magna was malathion, has an EC 50 (Effective concentration that affect 50% of experimental animal) value of 0.43 (mg/l) compared to that of bromacil 0.59 (mg/l). Mixture of bromacil and malathion was less toxic than separately and have larger EC 50 value 0.64 in toxic unit (TU) indicating potential antagonistic effect. Moreover, thiabendazole was more effective to fish than malathion. Relative toxicity (RT) indicates that thiabendazole has a lower value (0.276) than malathion indicating higher toxicity of thiabendazole. Furthermore, fish and D. magna were sensitive to low concentrations. These data indicate potent threats to aquatic organisms.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114388031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Know-Do Gap in Medical Management of Acute Diarrhea in Gaza City","authors":"A. El-Jedi, I. Lubbad","doi":"10.33976/iugns.28.1/2020/02","DOIUrl":"https://doi.org/10.33976/iugns.28.1/2020/02","url":null,"abstract":"Programs aiming to reduce the burden of diarrhea among children in lower source settings typically raise awareness regarding evidence-based guidelines, however, studies have suggested that provider's knowledge are not necessarily translated into adequate practice. To compare between the medical management knowledge and practices of acute diarrhea regarding the WHO guidelines, a cross-sectional study was conducted in Gaza city (May to August 2016), in order to improve medical adherence to these guidelines. The interview-based questionnaires targeted all physicians working at AL-Nassr and Al-Durra pediatric hospitals (102 physicians) to identify their knowledge regarding the guidelines. The response rate was 93%. Also, a retrieval sheet was used to identify their actual practices, where 301 acute diarrhea cases' records were retrieved. Most of Acute Diarrhea danger signs (3 and 4 compatible signs) was 10.6% in the knowledge v/s 18.9% in the practice. Most of dehydration signs (2 and 3 correct signs) were 71.1% in the knowledge v/s 47.5% in the practice. The percentage of correct classification of dehydration was only 4.2% in the knowledge v/s 27% in the practice. Though the percentage of requesting serum electrolytes was 88.4% in the knowledge, 54.2% of the records contained them. The sharp differences between knowledge and practices were found in the correct indication of IV fluids and the use of zinc during management of acute diarrhea, where the percentages 85.3%, and 86.3% respectively were in knowledge, compared with 16.3%, and 24.3% in the practice. The opposite was found in the use of antiemetics (24.2% VS 65.1%), antimicrobials (18.9% VS 59.1%), and the correct indications of ORS (23.2% VS 65.4%). Regarding the use of antidiarrheal, the difference between knowledge (4.2%) and practice (5.6%) was very small. The pediatricians reported that the largest problem impeding application of the guidelines was workload (48.5%). The relations were highly statistically significant in all of the comparison aspects, except in the number of identified danger signs and in the use of antidiarrheal (P-value were 0.367 and 0.586, respectively). The researcher called for the importance of adoption and application of the WHO diarrheal disease management guidelines as well as the need for audit and regular feedback.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126737791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulate the Demographic Changes in Gaza Strip After the Last Three Wars by Using Statistical Physics","authors":"M. A. Sumour, M. Shabat","doi":"10.33976/iugns.28.1/2020/06","DOIUrl":"https://doi.org/10.33976/iugns.28.1/2020/06","url":null,"abstract":"During the last period the Gaza Strip suffered a brutal war  that has affected all aspects of life in Gaza Strip, especially the demographic and social harmonization, low level of birth rate and increased level of young people emigration. Mortality and birth rates, emigration and retirement age, those factors play a major role in demographic changes in many countries.  The level of birth rate decreased in the past century, first without a noticeable decrease of the fertility, moreover the level of human life expectancy increased, leading to a significant increase in population growth. In many countries the number of births has fallen and the human life expectancy increased. This study concentrates on measuring, analyzing and extrapolating of age structure in the Gaza Strip for next few decades, using the updated data available.  A Fortran program was designed to simulate and analysis of statistical data,  to examine the demographic change in the Gaza Strip and the expectation of Palestinian problems in the future. The study showed that the Palestinians life expectancy will increase, the fertility the Palestinians women will decrease, the fraction of young manpower will decrease. Therefore the study recommends to increase the retirement age to 65 years, and to develop a strategic plan to decrease the emigration of young people","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131462168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quality of Life among Patients with Glaucoma in Gaza Governorates","authors":"M. Mushtaha, A. El-Jedi","doi":"10.33976/iugns.28.1/2020/03","DOIUrl":"https://doi.org/10.33976/iugns.28.1/2020/03","url":null,"abstract":"Background : Glaucoma is the second leading cause of blindness worldwide. Quality of Life (QOL) has emerged as an important parameter for assessing the quality of health care of patients with Glaucoma disease. This study assessed QOL among Glaucoma patients in Gaza Governorates and the factors influencing their life conditions. Methods: This is a descriptive, analytical, cross-sectional study included 265 eligible glaucoma patients from Al Nasser Ophthalmic Hospital and European Gaza Hospital. Socio-demographic and disease-related characteristics in addition to QOL data were collected using the Glaucoma Quality of Life-15 (GQL-15) and Short-Form 36 Health Survey (SF-36) questionnaires. Results : Study participants had a medium level of QOL scores. The mean score for GQL-15 was 59.2 ± 17.6. The greatest difficulty was in activities involving glare and dark adaptation (48.5±18.0), while least difficulty for outdoor mobility (66.6±25.4). The overall mean percentage of SF-36 domain scores was 61.7±13.5. The bodily pain domain got the highest score (79.4); the social function domain was (72.22); and the lowest domain was General Health (48.58). Findings also showed that participants without ocular diseases and comorbidities had better QOL. Moreover, patients with higher educational level, higher income and disease duration less than 5 years had better QOL scores. Conclusion: Glaucoma has moderately negative effects on people’s ability to function independently in every field of their lives. Glaucoma patients should be educated to understand the prognosis of the disease and importance of the adherence to the daily treatment to improve their QOL.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131774571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exact distribution of time between failures under gamma lifetime model","authors":"Mohamed I Riffi","doi":"10.33976/iugns.28.1/2020/01","DOIUrl":"https://doi.org/10.33976/iugns.28.1/2020/01","url":null,"abstract":"This paper is concerned with the distribution of the time between failures (TBF) under the gamma lifetime model. The exact distribution of TBF is computed in closed form. This allows interested researchers to compute the reliability of certain system models. To better visualize the distributions of TBF, its probability distribution function (pdf) is represented using matrices. Moreover, the moments of TBF is computed and given in closed form. Wolfram Mathematica cods are given in the appendix for fast and easy implementation. Finally, simulation studies for the TBF are performed together with relative tests results.","PeriodicalId":440576,"journal":{"name":"IUG Journal of Natural Studies","volume":"873 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133818734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}