Egyptian Journal of Chemistry http://ejchem.journals.ekb.eg/ Structural, Electronic, Optical Properties and Molecular Dynamics Study of WO3 W0.97Ag0.03O3 and W0.94Ag0.06O3 Photocatalyst by the First Principle of DFT Study

Today’s world is unimaginable without online social networks. Nowadays, millions of people connect with their friends and families by sharing their personal information with the help of different forms of social media. Sometimes, individuals face different types of issues while maintaining the multimedia contents like, audios, videos, photos because it is difficult to maintain the security and privacy of these multimedia contents uploaded on a daily basis. In fact, sometimes personal or sensitive information could get viral if that leaks out even unintentionally. Any leaked out content can be shared and made a topic of popular talk all over the world within few seconds with the help of the social networking sites. In the setting of Internet of Things (IoT) that would connect millions of devices, such contents could be shared from anywhere anytime. Considering such a setting, in this work, we investigate the key security and privacy concerns faced by individuals who use different social networking sites differently for different reasons. We also discuss the current state-of-the-art defense mechanisms that can bring somewhat long-term solutions to tackling these threats.

Introduction: Incidence of supraglottic carcinoma is more common which may be related to poor nutrition with personal habit like smoking and chewing habit of betel leaves with various ingredient. Objectives: To find out the incidence, age and sex distribution, occupation and clinical presentation of supraglottic carcinoma of larynx. Materials and Methods: In this prospective study, 30 patients of supraglottic carcinoma are collected from department of ENT and Head-Neck surgery, Combined Military Hospital, Dhaka from July 2012 to July 2013. Results: Patients belongs to different age groups, ranging from 40 to 80 years and maximum patients are in 50 to 60 years of age. The male to female ratio is 5:1. In this series, majority of patients are smoker (66.66%). Most of them are from low socio-economic group. The incidence of lymph node involvement is 40% (12 cases). Maximum number of patients presents with exophytic lesion (60%). Ulcerative lesions are 26.66% and infiltrative lesions are 13.33%. Maximum numbers of patients have T2 lesions (80%). T1 lesions are 20%. In this study all cases are histopathologically confirmed to be squamous cell carcinoma (100%). In this study, all cases are M0 state. Conclusion: Supraglottic carcinoma occurs between 40-80 years of age, more common in 5th and 6th decades. Chewing betel nut and tobacco should be avoided to reduce the risk of supraglottic carcinoma and early presentation & diagnosis will improve the prognosis of patients. JAFMC Bangladesh. Vol 15, No 2 (December) 2019: 224-226

Introduction: Ludwig’s angina is potentially life-threatening spreading cellulites of neck with high level of morbidity and mortality. Dental caries and diabetes mellitus are most common aetiological factor for Ludwig’s angina. Bad oral hygiene and poor socioeconomic condition are also responsible for this grave disease. This disease was frequently fatal; mortality rates for Ludwig’s angina exceeded 50% in the pre antibiotic era; however, antibiotics and aggressive surgical intervention have significantly reduced mortality recent series quote mortalities of 0-10%.  Objectives: To find out the aetiology of patient’s of Ludwig’s angina. Materials and Methods: This cross sectional descriptive study was conducted among 89 patients admitted in the Department of ENT and Head-Neck Surgery in Dhaka Medical College Hospital from 01.07.2010 to 30.06.2012. Patients were selected by specified inclusion and exclusion criteria. Data were collected in a structured questionnaire and analysed by SPSS 16.0 for Windows. Results: Among 89 patients about 69% were from rural area and55% from poor socio-economic class. Sixty-four patients (74.2%) suffered from dental caries and 15.7% were diabetic. Conclusion: Study shows some factors like dental caries, bad oral hygiene, oral mucosal infections, diabetes mellitus were associated with Ludwig’s angina, which may be preventable and curable by early diagnosis and intervention. The public awareness regarding aetiology of Ludwig’s angina may contribute great role in reduction of this disease prevalence. Journal of Armed Forces Medical College Bangladesh Vol.15 (1) 2019: 81-83

Lichen planus pemphigoides describe a rare subset of patients who usually have typical lichen planus then develop blistering on their lichen planus lesions and in normal skin. Less commonly the blistering antedates the lichen planus. They clinically appear to be a combination of lichen planus and bullous pemphigoid. Oral disease may occur and resemble either lichen planus or bullous pemphigoid. Lichen planus pemphigoides has been triggered by medication & PUVA. Pruritus may be severe and lesions may evolve to resemble pemphigoid nodularis. Histopathologically lichen planus lesions show lichen planus and bullous lesion shows the features of bullous pemphigoid. DIF is positive in a linear pattern with IgG and C3 along the basement membrane zone, at the roof of saline split skin. The antigen targeted by the autoantibody in Lichen planus pemphigoides is located in the same region as the bullous pemphigoid antigen (at the basal hemidesmosomes). Lichen planus pemphigoides tends to follow a benign and chronic course, even when compared to bullous pemphigoid. We diagnosed a case of Lichen planus pemphigoides on the basis of history, clinical examination, histopathology & DIF. The patient was treated with systemic & topical steroid, Dapsone. After 2 month of treatment steroid was withdrawn, but Dapsone continue with no relapse.To our knowledge this is the first diagnosed and treated case in this hospital.