Description of Carbon Dioxide Adsorption and Desorption onto Malaysian Coals under Subcritical Condition

AbstractCoal bed seams have been considered as promising sequestration reservoirs for CO2 disposal to mitigate the green house gas emissions. The CO2 adsorption and desorption attributes of CO2 on dry Malaysian coals (Sarawak, volatile bituminous) were performed using a sorptomat apparatus (ASAP 2010, Micromeritics, USA) and BELSORP-mini II machine (BEL Japan, Inc.) at 273K, 298K and pressure up to 1bar. The CO2 adsorption was favourable at low temperature and dry coal conditions. However, S3 and S4 coals have the highest adsorption capacity by 0.71 and 0.73 mmol/g respectively. According to IUPAC classification of adsorption isotherms, CO2 adsorption isotherm of all coal samples follow type I which most probably describe the adsorption limited to a few molecular layers (micropores). The results of adsorption and desorption isotherm demonstrate a positive hysteresis in all coal samples. The S1 coal and S2 coal have the highest hysteresis between adsorption and desorption isotherm compared to S3 coal and S4 coal. According to hysteresis classifications, the hysteresis during CO2 adsorption and desorption process for all coal samples follows type H3 which describes micropores and mesopores. The evaluation of the equilibrium adsorption data where fitted using by Langmuir, Freundlich, Redlich-Peterson, Koble-Corrigan, Toth and Sips models. Toth model provided the best fit for all adsorption experimental data that predicting all coals having heterogeneous surface properties

Cannabidiol for neuroprotection in newborn hypoxic-ischemic encephalopathy: pharmacological aspects and mechanisms of action

Tesis doctoral inédita, leída en la Universidad Autónoma de Madrid. Facultad de Medicina. Departamento de Pediatría. fecha de lectura: 9 de julio, 201

Clinical and Histologic Evaluation of Using Block Xenograft Combined With Leukocyte-Platelet Rich Fibrin (L-PRF) Versus Intraoral Autogenous Bone Block Graft With L-PRF in Treating Localized Ridge Defects: A Randomized Clinical Trial

Background: Augmentation of vertical bone defects remains the corner stone in periodontal tissue engineering. The amount and quality of alveolar bone available in all dimensions affects the success of dental implants for restoration of edentulous areas. Adequate and healthy bone supports the degree of osseointegration which in turn affects the long-term success of oral implants. The primary aim of the study was to histologically evaluate autogenous block grafts versus synthetic block grafts for the treatment of atrophic vertical and horizontal bony defects (Siebert Class III) in the anterior esthetic zone of the mouth. The secondary aim was to clinically and radiographically evaluate the outcomes of the procedure. Methods: This was a randomized controlled clinical study with a statistically determined sample size of 10 patients per group and a total of 20 patients in both groups. Patients with vertical and horizontal bone loss were enrolled from the Department of Oral Medicine, Periodontology, and Oral Diagnosis of Ain Shams University and Misr International University. Bone augmentation procedures were performed using two techniques: autogenous bone block graft and xenograft bone block graft both with leukocyte-platelet rich fibrin (L-PRF). Results: Both autogenous and xenograft blocks in conjunction with L-PRF had a significant effect on vertical bone augmentation in cases of atrophic ridges in the esthetic region. Conclusion: Both autogenous and xenograft bone blocks in conjunction with L-PRF have a significant effect on vertical bone augmentation in cases of atrophic ridges in the esthetic region

Tempol improves optic nerve histopathology and ultrastructures in cisplatin-induced optic neuropathy in rats by targeting oxidative stress—Endoplasmic reticulum stress—Autophagy signaling pathways

IntroductionOptic neuropathy is an affection of the optic neurons, which ends with blindness and occurs either primarily due to direct affection of the optic nerve or secondarily as a complication of chronic diseases and/or adverse effects of their therapy. The search for novel therapeutic tools is crucial in addressing the limited therapeutic approaches for optic neuropathy. Therefore, the present study was developed to investigate the possible ameliorative effect of tempol against cisplatin-induced optic neuropathy and its underlying mechanism.MethodsForty-eight adult male albino Wistar rats were divided into four equal groups—control, tempol (TEM), cisplatin (CIS), and tempol and cisplatin combined (TEM+CIS). Optic nerve oxidative stress (MDA, SOD, and GPx), gene expression of endoplasmic reticulum stress (ATF-6, XBP-1, BIP, CHOP, and JNK), autophagy 6 (LC3, Beclin-1, and p62) markers, nerve growth factor-1, immunohistochemical expression of (LC3 and p62), histopathological, and electron microscopic examination were performed.ResultsHistopathological and ultrastructure examination validated that cisplatin caused optic neuropathy by inducing oxidative stress, upregulating ER stress markers, and downregulating autophagy markers, and NGF-1 expression. TEM + CIS showed improvement in optic nerve structure and ultrastructure along with oxidative stress, ER stress mRNA, autophagy (immunohistochemical proteins and mRNA) markers, and nerve growth factor mRNA expression.ConclusionsBased on previous findings, tempol represents a valid aid in cisplatin-induced optic neuropathy by implicating new molecular drug targets (ER stress and autophagy) for optic neuropathy therapy

The effects of fiscal policy on the current account :an econometric analysis

PhD Thesi

Transnational Actions, Domestic Outcomes: How Diasporas Effect Change in Their Countries of Origin

Over the last 30 years, a growing body of research in political science has studied migration and transnationalism as complex political phenomena that have far-reaching consequences on the politics and societies of both sending and receiving countries. How migrants themselves experience migration and how those experiences are transferred to family and friends they leave in their country of origin has political consequences. Some scholars have argued that migration can induce or contribute to the democratization of sending countries through both financial and social processes, which can occur at the state and individual levels. Focusing on the effects of migration on individuals, I ask two questions. First, do migrants transfer norms to people in their country of origin, and do those norms differ based on whether their country of residence is or is not a democracy? To answer this question, I conduct a unique survey of Arab migrants around the world to examine their interactions with their families and their political and social beliefs as they relate to their country of origin. I find that there is a systematic difference in the attitudes and behaviors of migrants living in democracies—they are more likely to discuss politics with people in their country of origin and more supportive of democracy and liberal values than those living in autocratic countries. Building on this finding, I ask whether the attitudes and behaviors of receivers—i.e., the family and friends in the country of origin—also differ based on the migrant’s location. Using survey data from Arab Barometer Wave V and migrant stock from the United Nations Population Division to approximate migrant location, I find no evidence of a conditioning effect of the migrant’s country of residence. Instead, I find that people receiving remittances in the country of origin are less supportive of democracy regardless of whether their migrants live in an autocratic country or democratic country, and it also has no effect on their espousal of liberal values. However, those with migrant family/friends are more participatory both in civic organizations and contentious political action, but this effect differs based on the frequency with which the individual receives remittances. Further analysis reveals important profile differences among remittance receivers based on receipt frequency. Overall, I find evidence of democratic political learning among migrants but no strong evidence of a diffusion effect of that learning from migrants to friends and family at home

Internet Regulation in Egypt: Outcomes and Policy Recommendations

With the rapid developments the Internet is witnessing, the topic of internet regulation sees itself taking center stage in a rising global debate among many stakeholders. This debate centers around hot topics and fundamentals such as the rights of free speech and access to information, intellectual property, as well as user and data privacy, and security issues. Egypt is no exception; especially after the uprising and mass demonstrations in 2011 and the growing concerns around internet regulation and freedom of expression. This thesis aims at examining the development process of the current Internet regulation policy in Egypt to study its outcomes on the freedom of the internet and online journalism. The thesis will start with a narrative discussion on the historical development of internet regulation, followed by a comparative study between the progression and current regulation efforts in some of the developed and developing countries around the world such as China, Singapore, The European Union, The United Kingdom, Germany, Tunisia and Egypt, to examine the progression of policies from mass media to the Internet. Data on Egypt will be collected through conducting a qualitative research with policy makers, the private sector and civil society journalism. The thesis will conclude with policy recommendations to the Egyptian Supreme Council for Media Regulation

Experimental investigation of flexible rotors in water

National audienc