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Diagnosis of osteopetrosis in bilateral congenital aural atresia: Turning point in treatment strategy

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World Journal of Clinical Pediatrics 2016年第2期5卷 228-233页

作者： Ritu Verma Manisha jana Ashu Seith Bhalla Arvind kumar Rakesh kumar Department of Radiodiagnosis All India Institute of Medical Sciences Department of Otorhino--laryngology All India Institute of Medical Sciences

Aural atresia is a rare congenital malformation of the external and middle ear. There are several syndromic associations of this anomaly with those involving the first and second branchial arches. Occurrence of aural atresia with sclerosing skeletal dysplasia is unknown and has never been reported. The coexistence of a sclerosing dysplasia can make the surgical treatment in aural atresia difficult and risky; and the auditory improvement may not be as expected. Moreover, internal auditory canal narrowing and hence sensorineural hearing loss in sclerosing dysplasia might add to the already existing conductive hearing loss in such patients. In this case report we have described an unknown association of bilateral microtia with sclerosing skeletal dysplasia(autosomal dominant osteopetrosis) and clinical implications of these two conditions occurring together leading to a change in the management plan.

关键词： Aural atresia Osteopetrosis Congenital hearing loss Microtia

Combined Effects of Hall Current and Radiation on MHD Free Convective Flow in a Vertical Channel with an Oscillatory Wall Temperature

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Open Journal of Fluid Dynamics 2013年第1期3卷 9-22页

作者： Sankar kumar Guchhait Sanatan Das Rabindra Nath jana Department of Applied Mathematics Vidyasagar University Midnapore India Department of Mathematics University of Gour Banga English Bazar India

The combined effects of Hall current and radiation on an unsteady MHD free convective flow of a viscous incompressible electrically conducting fluid in a vertical channel with an oscillatory wall temperature have been studied. We have considered two different cases 1) flow due to the impulsive motion of one of the channel walls and 2) flow due to the accelerated motion of one of the channel walls. The governing equations are solved analytically using the Laplace transform technique. It is found that the primary velocity and the magnitude of the secondary velocity increase with an increase in Hall parameter for both the impulsive as well as the accelerated motions of one of the channel walls. An increase in either radiation parameter or frequency parameter leads to decrease in the primary velocity and the magnitude of the secondary velocity for both the impulsive as well as accelerated motions of one of the channel walls. The fluid temperature decreases with an increase in radiation parameter. Further, the shear stresses at the left wall reduce with an increase in either radiation parameter or frequency parameter for both the impulsive as well as the accelerated motions of one of the channel wall.

关键词： Hall Current MHD Free Convection Radiation Prandtl Number Grashof Number Frequency Parameter Impulsive Motion Accelerated Motion

Cobalt Incorporated Pyramidal Shaped α-Fe₂O₃ Nanoparticles from Poly-vinyl Alcohol Based Precursor

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Advances in Nanoparticles 2016年第1期5卷 9-17页

作者： Atanu Naskar Susanta Bera Awadesh kumar Mallik Sunirmal jana Sol-Gel Division CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI) P.O. Jadavpur University Kolkata India Bioceramic and Coating Division CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI) P.O. Jadavpur University Kolkata India

Precursor foam based Co incorporated α-Fe2O3 (AFC) was successfully synthesized at 600℃ calcination temperature by simple solution method using PVA. The formation of α-Fe2O3 nanoparticles was confirmed by X-ray diffraction measurement and reduction in crystallite size was found after cobalt incorporation. Field emission scanning electron microscopy revealed the existence of pyramidal shaped iron oxide in AFC. FTIR and Raman spectra also confirmed the presence of α-Fe2O3. Photocatalytic activity study showed that the cobalt incorporated α-Fe2O3 was better photocatalyst than pure α-Fe2O3. The cobalt incorporated iron oxide nanoparticles could be used for drug delivery application and this simple preparation method could be adopted for the synthesis of other transition metal oxides.

关键词： Sol-Gel Based Foam α-Fe2O3 Nanoparticles Polyvinyl Alcohol Catalytic Activity

Clinical outcome of orbital apex syndrome in COVID associated mucormycosis patients in a tertiary care hospital

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International Journal of Ophthalmology(English edition) 2022年第4期15卷 527-532页

作者： Smiti Rani Srivastava Purban Ganguly Debasis Barman Sudip Das Manimoy Bandyopadhyay asim kumar Ghosh Subhra Sarkar Amitabha Sengupta Sarbari Swaika Pritam Chatterjee Amit kumar Gupta Alok Ranjan Mondal Soumyajit Guha Sinjita Dutta Souvik Adhikari Aditi Kaushik Partha Sundar Biswas Asif Ayub Department of Ophthalmology Institute of Post Graduate Medical Education and Research and Seth Sukhlal Karnani Memorial HospitalKolkata 999008India

AIM: To share clinical pattern of presentation, the modalities of surgical intervention and the one month postsurgical outcome of rhino-orbito-mucormycosis(ROCM) ***: All COVID associated mucormycosis(CAM) patients underwent comprehensive multidisciplinar y examination by ophthalmologist, otorhinolaryngologist and physician. Patients with clinical and radiological evidence of orbital apex involvement were included in the study. Appropriate medical and surgical intervention were done to each patient. Patients were followed up one-month post intervention. RESULTS: Out of 89 CAM patients, 31(34.8%) had orbital apex syndrome. Sixty-six(74.2%) of such patients had pre-existing diabetes mellitus, 18(58%) patients had prior documented use of steroid use, and 55(61.8%) had no light perception(LP) presenting vision. Blepharoptosis, proptosis, complete ophthalmoplegia were common clinical findings. Seventeen(19.1%) of such patients had variable amount of cavernous sinus involvement. Endoscopic debridement of paranasal sinuses and orbit with or without eyelid sparing limited orbital exenteration was done in most cases, 34(38.2%) patients could retain vision in the affected eye. CONCLUSION: Orbital apex involvement in CAM patients occur very fast. It not only leads to loss of vision but also sacrifice of the eyeball, orbital contents and eyelids. Early diagnosis and prompt intervention can preserve life, vision and spare mutilating surgeries.

关键词： rhino-orbito-cerebral mucormycosis COVID associated mucormycosis orbital exenteration endoscopic paranasal sinus debridement orbital apex syndrome

Cell Size versus Taxonomic Composition as Determinants of As (III &V) Sensitivity in the Estuarine Diatom Communities

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Journal of Water Resource and Protection 2011年第6期3卷 363-369页

作者： Chumki Chowdhury Natasha Majumder Sanjay kumar Mandal Manab kumar Dutta Raghab Ray Tapan kumar jana 不详

Despite scarce studies have analyzed the relative growth inhibition of As (III) and As (V) to diatom, clear pattern of interspecies difference have been shown, identifying cell size as a key property determining the sensitivity of diatom to As. Evidence from cultures suggests that cell size is a key factor in determining the extent of arsenic (III) & (V) stress of diatom, with relatively lesser effects of As (V) than As (III) on small cells. Cent percent growth inhibition was observed for large size group (Coscinodiscus radiatus, Surirella, Amphipleura, Thalassiothrix, Cyclotella and Thalassiosira decipiens) relative to smaller size group (Skeletonema cf. costatum, Navicula rhombica, Amphora hyaline, Nitzschia longissima except Thalassisira. Interspecies differences in As tolerance by diatom in the mangrove ecosystem indicates cell size could be only one factor contributing to these differences. The results show that 81.7% of total arsenic was uptaken from culture media originally amended with arsenic. Looking to the extreme tolerance and arsenic removal efficiency, application of the species with smaller cell size relative to the other tested diatom for bioremediation purpose can be envisaged.

关键词： Diatoms Cell Size Arsenic (III&V) Mangrove

Skeletal dysplasias: A radiographic approach and review of common non-lethal skeletal dysplasias

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World Journal of Radiology 2014年第10期6卷 808-825页

作者： Ananya Panda Shivanand Gamanagatti Manisha jana Arun kumar Gupta Department of Radiodiagnosis All India Institute of Medical Sciences Ansari Nagar New Delhi 110029 India

Skeletal dysplasias are not uncommon entities and a radiologist is likely to encounter a suspected case of dysplasia in his practice. The correct and early diagnosis of dysplasia is important for management of complications and for future genetic counselling. While there is an exhaustive classification system on dysplasias, it is important to be familiar with the radiological features of common dysplasias. In this article, we enumerate a radiographic approach to skeletal dysplasias, describe the essential as well as differentiating features of common non-lethal skeletal dysplasias and conclude by presenting working algorithms to either definitively diagnose a particular dysplasia or suggest the most likely differential diagnoses to the referring clinician and thus direct further workup of the patient.

关键词： Skeletal dysplasia Short limb dwarfism Rhizomelia Radiograph Skeletal survey Review Spondylopepiphyseal dysplasia Multiple epiphyseal dysplasia Achondroplasia Algorithm Approach

Geochemistry of Tikak Parbat Sandstones and Tipam Sandstones Occurring in and around Dilli Area, Sivasagar District, Assam, India

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Open Journal of Geology 2017年第8期7卷 1238-1267页

作者： Hrishikesh Baruah asim Dutta Lahkar Balen Bhagabati Ranjeeta Kar Pradip kumar Das Department of Geology Arya Vidyapeeth College Guwahati India Department of Geological Sciences Gauhati University Guwahati India

This study presents a geochemical investigation of Tikak Parbat and Tipam Sandstone Formations occurring in and around Dilli area, Sivasagar, Assam. Petrographically Tikak Parbat and Tipam sandstones are mainly quartzose arenite to sublitharenite types with their constituents being derived from recycled orogen provenance under sub-humid to humid climatic conditions. Geochemically, sandstones of both the formations range from sublitharenite to wacke. They indicate a recycled orogen source and influence of humid to arid condition. Source rocks of Tikak Parbat sandstones were more weathered than the Tipam sandstones. While Tikak Parbat sandstones show affinity towards passive margin, Tipam sandstones hint at active continental margin setup, where clasts were supplied from uplifted areas. Upliftment of provenance covering areas of Naga Patkai Range in the south east and Eastern Himalayas along the syntaxial bend during mid Miocene affected the sandstones. Tikak Parbat sandstones reflect a stable tectonic setup which later underwent a phase of volatility leading to deposition of the Tipam sandstones. Our study supports a sediment supply from the upper continental crust, largely of granitic composition, however, with a significant variation in their depth of source supply. Trace element analyses indicate depositional setup with low ventilation marked by both oxic and anoxic phases.

关键词： Geochemistry Provenance Palaeoweathering Tikak Parbat Sandstones Tipam Sandstones Dilli (Assam India)

Telemedicine,the current COVID-19 pandemic and the future:a narrative review and perspectives moving forward in the USA

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Family Medicine and Community Health 2020年第3期8卷 50-58页

作者： asim Kichloo Michael Albosta Kirk Dettloff Farah Wani Zain El-Amir Jagmeet Singh Michael Aljadah Raja Chandra Chakinala Ashok kumar Kanugula Shantanu Solanki Savneek Chugh Internal Medicine Central Michigan University College of Medicine East CampusSaginawMichiganUSA Family Medicine Samaritan Medical CenterWatertownNew YorkUSA Medicine Geisinger Commonwealth School of MedicineScrantonPennsylvaniaUSA Internal Medicine Hurley Medical CenterFlintMichiganUSA Nephrology Westchester Medical CenterValhallaNew YorkUSA

A narrative review was conducted to examine the current state of the utilisation of telemedicine amid the current COVID-19 pandemic and to evaluate the benefits of continuing telemedicine usage in the future.A literature review was performed for articles related to *** including PubMed,Google Scholar,Cochrane Library and Ovid MEDLINE were *** reviewers independently performed article selection based on relevance to our *** included all articles between 1990 and 2020 related to telemedicine using the following keywords:‘telemedicine’,‘telehealth’,‘policy’,‘COVID-19’,‘regulation’,‘rural’,‘physical examination’,‘future’.A total of 60 articles were identified,and through careful selection we narrowed the final number of articles to 42 based on relevance to our *** has been rapidly evolving over the past several *** with regulation and reimbursement have prevented its full immersion into the healthcare *** the current pandemic,Centers for Medicare and Medicaid services have expanded access to telemedicine *** advantages of telemedicine moving forward include its cost-effectiveness,ability to extend access to specialty services and its potential to help mitigate the looming physician *** include lack of available technological resources in certain parts of the country,issues with security of patient data,and challenges in performing the traditional patient *** is critically important that changes are made to fully immerse telemedicine services into the healthcare landscape in order to be prepared for future pandemics as well as to reap the benefits of this service in the future.

关键词： services moving landscape

Salt tolerant culturable microbes accessible in the soil of the Sundarban Mangrove forest, India

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Open Journal of Ecology 2011年第2期1卷 35-40页

作者： Subhajit Das Minati De Raghab Ray Dipnarayan Ganguly Tapan kumar jana Tarun kumar De Department of Marine Science Calcutta University 35 B.C. Road Calcutta-700 019

Sundarban Mangrove forest is highly productive marine ecosystem where halophilic microbes actively participate in bio-mineralization and biotransformation of minerals. The population of aerobic halophilic microbes was studied to determine their distribution with the availability of different physicochemical parameters with increasing depth of this forest sediment. The present study revealed that microbes present in the top soil region were less tolerant to fluctuation in salinity than the middle and bottom segment. Microbes isolated from bottom segment showed higher growth rate in anaerobic condition. A decreasing trend of total microbial population and organic carbon content of soil were found with increase in depth. In contrary a reverse profile was found for salinity. A significant stratification was found to exist among microbial population and the salty nature of the soil of Sundarban Mangrove forest.

关键词： Sundarban Mangrove Forest Ecosystem Halophilic Microbes Aerobic Condition Anaerobic Condition