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Characterization of End of Life Personal Computers for Optimum Resource Recovery
Full text linkThe End of Life Personal Computers (EOL-PCs) generated by Information and Communication Technology (ICT), end up in waste streams and form a part of E-waste. This waste forms a secondary resource for many metals and non metals recovered through recycling processes. The computers have undergone revolutionary change in size, shape, configuration and its material content, particularly from the last two decades. However, the Handy-Harmann data of 1966 related to quality and quantity of the material used in manufacturing of computer has been very old and not updated since 1966. This may result in inefficient resource recovery and partially treated waste containing hazardous substances may end up in unauthorized landfill or water bodies causing permanent damage to the environment. Therefore, an attempt has been made to characterize the EOL-PCs model P-III which form a major part of E-waste even today. The results obtained help assessment of economic viability of recoverable and recyclable quantities of metals viz., Fe, Cu, Al, Au, Ag, Pd, etc., non metals like plastics and glass from P-III model computers. The paper also discusses comparative study of latest characterization of EOL-PCs with Handy-Harmann data of 1996
Comparison of Piezosurgery and Conventional Hand-pieces in Open Sinus Lifting Surgery
Full text linkBased on the ultrasonic principle, the piezoelectric transducer produced moderated frequencies in the medical and industrial sciences. Selectable cuttings can be selected by adjusting the frequency only on mineralized tissues, including the highlights of this device. In many of the precise and sensitive surgeries that the site is close to the important anatomical structure, this property is used to facilitate and secure the surgery. Sinus surgeon surgery is performed in cases where there is no sufficient bone for implant support in the posterior maxilla. It is essential to success the implant and the reconstruction of the dental system.Purpose: The aim of this study was to compare the intra-operative and post-operative effects of piezosurgery and conventional rotative instruments in the open-sided sinus lifting procedure.Materials and methods: In this cross-sectional study 23 patients requiring direct sinus lifting were enrolled. The osteotomy and sinus membrane elevation were performed either with piezosurgery tips or rotative diamond and carbide burs and hand-piece membrane elevators. Time elapsed between bony window opening and completion of membrane elevation (duration), incidence of membrane perforation, visibility of the operation site, postoperative pain and swelling were evaluated.Results: There was no significant difference between piezosurgery and conventional groups regarding incidence of membrane perforation and post-operative pain (P0.05). However, there were significantly more duration, postoperative inflation and poor operation site visibility and access in the piezosurgery group compared with the hand-piece group (P0.05)
Pro-inflammatory Cytokines and Oral Lichen Planus
Full text linkPro-inflammatory Cytokines are powerful mediators which play a central role in both innate and adapted immune responses. Aberrant productions of cytokines may lead to the onset of immune deficiency, allergy or autoimmunity, which are involved in the mechanisms of various immune-mediated inflammatory diseases. Oral lichen planus (OLP) is a chronic inflammation disease affecting the oral mucosa with unknown aetiology. Previous studies have described the abnormal expression patterns of various inflammation-related cytokines, such as IL-1, 2, 4, , 6, 8, 10, 12, 17, 18, TGF- , IFN- and TNF- , in lesions, saliva, serum and peripheral blood mononuclear cells from patients with OLP, which may reflect the immune dysregulation status and emerge as central players in the immunopathogenesis of OLP. Besides, the gene polymorphisms of several cytokines such as IFN- , TNF- , IL-4, IL-10 have been found to be involved in the susceptibility of OLP. The aim of this paper is to briefly present the characteristics and a current description about the involvement of these pro-inflammatory cytokines in the pathogenesis of OLP leading to understand the eventual malignant transofrmation of OLP to Oral Cancer
Chondrosarcoma of the Sternum Treated with En Bloc Resection: A Case Report
Full text linkIntroduction: Chondrosarcomas are malignant neoplasms of cartilaginous mesenchymal. The diagnosis is based on a complete radiological examination. The treatment of choice is surgical, being the only curative option due to the resistance of the lesions to chemotherapy and radiotherapy. Case presentation: 66-year-old male patient presenting chest pain, dry cough and occasional dyspnea, diagnosed with sternal chondrosarcoma and treated with en bloc resection of the tumor mass.Conclusion: A primary chondrosarcoma of the sternum was treated with resection of the anterior costal railing, pericardium, tumor mass and partial sternectomy, en bloc. Reconstruction was performed using Marlex microporous mesh
Investigations on Properties of Glass Fibre Reinforced Polymer Composite
Full text linkThe aim of present study is to investigate the water absorption, mechanical and thermal properties of glass fibre reinforced polymer composites (GFRPCs). Multi layers of woven glass fibres are reinforced into epoxy matrix to prepare the composites by hand lay-up technique. Water absorption properties are investigated in terms of percentage of water uptake, and sorption, diffusion and permeability coefficients. On the other hand, mechanical properties are investigated in terms of tensile, flexural and impact test as per ASTM standards. Moreover, thermal properties are investigated using thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The results have been shown that water absorption, mechanical and thermal properties are increased with increase in numbers of layers of woven glass fibres in epoxy matrix
Evaluation of Hard and Soft Tissue Changes Due to Implant Surgery First Phase with or without Using Topical Antibiotic (Tetracycline) Applying under Screw Cover
Full text linkDespite the fact that today the process of implant treatment is introduced as a common oral and dental treatment, it is therefore necessary for a surgeon and dentist to provide a specified umbilical cord to prescribe antibiotics for patients with this treatment plan. Bacterial agents have a direct relationship with early failure of dental implants. One of the main causes for possible infections until the second surgery and the threat to the success of the dead space implant among the screw cover, the interior of the implant fixture, the presence of infectious and infectious agents, including saliva and blood there. Also, these cases have led some surgeons to use a 1% prophylactic ointment in the area of the internal surface of the fixture and under the cover of the screw to prevent possible complications.Purpose: The aim of this study was to determine the relationship between the use of 1% ocular tetracycline ointment in the treatment of dental implants and the reduction of fistula and inflammation, as well as the reduction of bone erosion in subsequent follow-up.Materials and methods: In the case of fistula and inflammation of the data, a clinical observation was carried out by examination by the surgeon to examine the indices of cervical sinus and redness of the tissue. In the context of bone erosion, pre-apical radiographs of patients were calculated approximately 3 months after processing photos in the Photoshop program with a digital caliper with a precision of 0.01 mm.Results: The result of this study was not statistically significant in relation to bone erosion (p0.05). Regarding the study of inflammation and fistula, also it was not statistically significant (p0.05). Another one was the ease of opening the screw cover in the test group, which is considered an advantage. But since the overflow or lack of flow of the screw cover bacteria has not been proven and not to be significant of data in this study, protocols cannot be used for the use or non-use of topical tetracycline
A COMPLETE RESPONSE OF METASTATIC RENAL CELL CARCINOMA TO BEVACIZUMAB AND INTERFERON AFTER A NEPHRECTOMY : CASE REPORT
Full text linkIn general, metastatic renal cell carcinoma (mRCC) is managed with systemic treatments and cytoreductive nephrectomy is recommended only when it is feasible. Historically, systemic treatment of mRCC was limited to cytokine treatment with interferon (IFN) and interleukin (IL)-2, as chemotherapy was considered to be ineffective in these patients. Bevacizumab in combination with interferon alfa is approved for treatment-nave advanced renal cell carcinoma (RCC) in both the US and Europe. Its objective response rates is 30%. We report a case of a patient who presents a complete response after a nephrectomy and bevacizumab associated to interferon alpha
Management of Secondary Hemophagocytosis Lymphohistiocytosis with Severe Liver Dysfunction
Full text linkIntroduction:Hemophagocytosis Lymphohistiocytosis (HLH) is a syndrome of inappropriate hyperimmune response. Presentation of Case:We present a case of secondary HLH associated with systemic lupus erythematous (SLE) and liver dysfunction.Conclusion:This case report focuses on the diagnostic dilemmas with HLH and an individualized treatment approach to the patient
Synthesis and Characterization of Novel Nanobifiller filled Epoxy Anti-Corrosive Nano-Organic coating for High Performance Automotive Applications
Full text linkNanobifiller filled epoxy, nylon 66 (PA 66) and their blend-based nanocomposites were prepared by solution casting method to produce anti-corrosive and abrasion resistant epoxy nanocoating for aerospace and automotive applications. Nanobifiller was composed of Bentonite clay modified organically with quaternary salt of threonine amino acid and nanodiamonds (ND). Various techniques were implied to investigate anticorrosive properties of polymeric nanocomposites. These techniques include salt spray analysis and electrochemical impedance spectroscopy (EIS). It was observed that epoxy nanocomposites prepared are much resistant to corrosion as compared to pristine epoxy samples with improved barrier properties
Diffuse Large B-cell Lymphoma during Pregnancy
Full text linkIntroduction:Non-Hodgkin Lymphoma (NHL) during pregnancy are very uncommon, and primary symptoms of NHL are similar to pregnancy physiologic changes.Case presentation:We report a case of NHL during pregnancy that didn’t have any peripheral lymphadenopathy, with mediastinal involvement. Chemotherapy began during pregnancy and after delivery treatment continued with chemotherapy and radiotherapy, and mother and baby were both healthy.Conclusion: Early diagnosis of NHL cause to better prognosis of disease andmaking a chance for mother to make a decision about continue pregnancy or not and about her treatments