Impedance spectroscopy study of zinc oxide incorporated iron borate glass-ceramic

Ramteke Rajat,Kumari Kalpana,Bhattacharya Soumalya,Sharma Sanjeev Kumar,Rahman M.R. 한국물리학회 2021 Current Applied Physics Vol.22 No.-

Here, the effects of zinc oxide (ZnO) on impedance and dielectric properties of the ZnO incorporated iron borate (Fe3BO6) glass-ceramics were studied using impedance spectroscopy in a wide range of frequency (1 Hz – 1 MHz) and temperature (25 ◦C–250 ◦C). With ZnO addition, the ε′ and tanδ values were reduced significantly, the strength of the relaxation process also decreased, along with a decrease in conductivity. Activation energies associated with modulus and conductivity plots suggest that similar type of charge carriers was responsible for the relaxation and conduction processes. The analysis of both complex impedance and conductivity show the negative temperature coefficient of resistance (NTCR) behavior of the samples. The thermistor constant B-values of 5ZnO and 10ZnO were found to be 7223 and 7088 respectively. The study of the NTCR properties suggests a potential candidate for thermistor applications.

Poster Session : PS 0128 ; Cardiology : Case Report - An Unusual Association of Mitral Stenosis with Diffuse Systemic Sclerosis

( Girish Ramteke ),( Sanjay Dubey ),( Neeraj Dayani ),( Mridulata Prajapati ),( Paridhi Shivde ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1

Introduction: Disorders of collagen tissue are caused by humoral and cellular mediated immune responses mediated by cytokines like TGF ß, TNF a etc. The various disease manifestations include mixed connective tissue diseases, rheumatoid arthritis, sjogren`s syndrome, systemic sclerosis etc. One of the associations is that of cardiac valvesstenotic lesion-though extremely rare. We report one such rare case. Case presentation: 60 year old female presented with a history of tightness of skin, contractures of fingers, inability to open mouth and pitting scars over the tip of digits. There was no history of breathlessness. There is a history of rheumatic heart disease-mitral stenosis-open mitral valvulotomy 7 years ago. On evaluation she had features suggestive of Mauskopf`s facies, microstomia and other features of systemic sclerosis and the ACR criteria suggested systemic sclerosis. Modified Rodnan skin thickness score was 43 out of 51. Her Antiscl-70 antibody was positive and skin biopsy showed dermal sclerosis. HRCT chest showed- septal thickening with ground glass appearance. Though the patient was asymptomatic her echo revealed chordal shortening, cuspal retraction which was an additional feature compared to earlier echo 7 years ago. This association of valvular involvement in systemic sclerosis is an extremely rare association with only 5 cases reported in literature. Conclusion: Association of valve- stenotic has been very rarely associated with collagen disease like systemic sclerosis; though other collagenous tissues of the body are involved cardiac valves are generally spared. With only 5 cases reported in the literature we report one such case of this rare association where in an initially affected and treated mitral valve due to rheumatic heart disease has been now involved due to systemic sclerosis.

Sirolimus-induced leukocytoclastic vasculitis

Vishal Ramteke,Sainath Pattewar,Nitin Barde,Nishant Deshpande 대한이식학회 2023 Korean Journal of Transplantation Vol.37 No.4

Treatment of toluene, benzene, naphthalene and xylene (BTNXs) containing wastewater using improved biological oxidation with pretreatment using Fenton/ultrasound based processes

Lokeshkumar P. Ramteke,Parag R. Gogate 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.28 No.-

Improved biological oxidation based on pretreatment using combined Fenton and ultrasound inpresence of stirring as the best approach and use of modified activated sludge was demonstrated for thetreatment of wastewater containing benzene, toluene, naphthalene and o-xylene. The optimumpretreatment conditions were observed as initial pH of 3–3.5, Fe2+ dosage of 2.0 g L–1 and H2O2 dosage of1.0 g L–1 giving about 80–95% reduction in the chemical oxygen demand (COD) and favorable BOD5/CODvalue for the biological oxidation. Use of modified prepared activated sludge gave about 20–30% higherextent of degradation as compared to the conventional sludge types.

Effect of grading pattern and porosity on the eigen characteristics of porous functionally graded structure

Prashik Malhari Ramteke,Subrata K. Panda,Nitin Sharma 국제구조공학회 2019 Steel and Composite Structures, An International J Vol.33 No.6

The current article proposed to develop a geometrical model for the analysis and modelling of the uniaxial functionally graded structure using the higher-order displacement kinematics with and without the presence of porosity including the distribution. Additionally, the formulation is capable of modelling three different kinds of grading patterns i.e., Power-law, sigmoid and exponential distribution of the individual constituents through the thickness direction. Also, the model includes the distribution of porosity (even and uneven kind) through the panel thickness. The structural governing equation of the porous graded structure is obtained (Hamilton's principle) and solved mathematically by means of the isoparametric finite element technique. Initially, the linear frequency parameters are obtained for different geometrical configuration via own computer code. The comparison and the corresponding convergence studies are performed for the unidirectional FG structure for the validation purpose. Finally, the impact of different influencing parameters like aspect ratio (O), thickness ratio (S), curvature ratio (R/h), porosity index (λ), type of porosity (even or uneven), power-law exponent (n), boundary condition on the free vibration characteristics are obtained for the FG panel and discussed in details.

Automated gear fault detection of micron level wear in bevel gears using variational mode decomposition

Dada Saheb Ramteke,Anand Parey,Ram Bilas Pachori 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.12

Gearboxes have an important role in power transmission systems. For such systems, vibration-based fault diagnosis techniques are frequently used to prevent premature failure and to ensure smooth transmission. We automated the fault diagnosis of gears having level of wear fault at micron using variational mode decomposition (VMD). VMD has been applied iteratively with specific input parameters. VMD decomposes the gear vibration signal into different narrowband components (NBCs) or obtained components (OCs). Various statistical features, namely kurtosis, skewness, standard deviation, root mean square, and crest factor, were extracted from the different OCs. Kruskal-Wallis test based on probability values was used to identify the significant features. For the automation of fault detection system, a comparative study was done using the random forest, multilayer perceptron, and J48 classifiers. The proposed method exhibits 96.5 % accuracy using random forest classifier with combined kurtosis, skewness, and standard deviation features.

Renal cell carcinoma concomitant with multiple myeloma

Anubhav Narwal,Prashant Ramteke,Lalit Kumar,Saumyaranjan Mallick 대한병리학회 2022 Journal of Pathology and Translational Medicine Vol.56 No.2

Poster Session : PS 0151 ; Neurology : Arnold Chiari with Hemiparesis, Hemisensory Loss with Lower Cranial Nerve Palsy

( Vikas Asatl ),( Girish Bhageshwar Ramteke ),( Vinatak Jatale ),( Vep Prakash Pandey ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1

The Chiari I malformation (CMI) is caudal displacement of cerebellar tonsils into cervical spinal-canal. CMI is defi ned by tonsillar herniation more than 5 mm below foramen-magnum, may be congenital or acquired. We are presenting case of Arnold chiari with hemiparesis, hemisensory loss with lower cranial nerve palsy. 50 year male, complaints of tingling, numbness left LL, UL since 7 months, Weakness left LL, UL 6 months, drycough, diffi culty in swallowing, regurgitation of food, headache 3 months. Decubitus -supine position left leg extended laterally rotated, higher functions normal. Trigeminal- there is loss of all sensation modalities on left side of face, Gag refl ex is normal with normal palatal movement, Left side shoulder cannot be raised, power of tongue is slightly decreased on left, resting nystagmus with fast component toward right side. On attempting to see right side nystagmus increases while on seeing to left decreases. Heel-knee, fi nger-nose-test on right side is normal, on left side unable to do due to motor weakness. MRI Brain parenchyma normal. Inferior cerebellar tonsillar herniation in dorsal subarachnoid space extending about 6-7 mm below the posterior arch of atlas-Chiari Malformation type I, Mild indentation is seen on the dorsal surface of upper cervical cord. Minimal inferior displacement of 4th ventricle, no hydrocephalus, no syrinx. Discussion: Chiari malformations consist of varying degree of ectopia of cerebellum. Incidence in MRI is between 0.56% and 0.77%.Type I: Elongation of tonsils and medial parts of the inferior lobes of cerebellum into cone-shaped projections, which accompany medulla oblongata into spinal canal. Type II Displacement of parts of inferior vermis, pons, medulla-oblongata together with elongation of fourth ventricle (most cases with spina bifi da). Type III The entire cerebellum herniates into the cervical canal. Type IV is with Cerebellar hypoplasia.

Slide Session : OS-END-15 ; Endocrinology : A Study of Endothelial Dysfunction by Flow Mediated Dilatation of Brachial Artery in Euglycemic & Hyperglycemic Individuals

( Sarath Menon ),( Girish Ramteke ),( Dharmendra Jhavar ),( Manoj Gupta ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1

Background: Endothelial dysfunction is regarded as an early marker for atherosclerosis & a precursor for future cardiovascular events. Objectives: Study was done to find out endothelial dysfunction (ED) in euglycemic & hyperglycemics. finding any endothelial dysfunction in high risk euglycemic & pre-diabetic individuals and compared degree of ED with different types of hyperglycemia, glycemic parameters & common cardio-vascular (CV) risk factors. MATERIAL & Methods: A cross-sectional, prospective study was done in subjects divided into two groups. First group included hyperglycemic individuals (80) Pre-diabetes( 20), Type1DM(20), Type2 DM (34), clinically labeled MODY(06) and second group included 40 euglycemic individuals. Body mass index, fasting lipid profile, FBS, PPBS, RBS, HbA1c were obtained. Endothelial dependent flow mediated dilatation was assessed with 7.5MHz high resolution ultrasound of brachial artery. A p-value of <0.05 was considered to be statistically significant. Results: Flow mediated dilatation was impaired with increase in age, BMI, lipid profile (p=0.04,0.02,0.02 respectively). FMD was seen inversely related to all glycemic parameters like FBS(r=.680,p=<0.001),PPBS(r=-.660,p=<0.001),RBS(r=.680,p=<0.001), HbA1c(r=-.820,p=<0.001).Flow mediated dilatation was impaired in Pre-diabetes, Type 1 DM,Type2 DM, Clinical MODY, but did not show significant difference between each other (9.03+0.73% vs 8.21+1.18% vs 6.95+2.14% vs 9.4+0.45%,p=0.20) but had significant difference when compared to euglycemics (14.01+3.06%,p=<0.001).FMD was impaired even in high-risk euglycemics(p=0.02) Conclusion: Results showed impaired endothelial function in hyperglycemics and endothelial dysfunction was seen even in Pre-diabetes and in high risk euglycemic individuals, thus showing endothelial damage in these early stages. Endothelial function declined with increase in the severity of glycemic parameters and common CV risk factors. Our study suggested FMD should be considered as a surrogate marker for future cardiovascular events.

Poster Session : PS 0314 ; Hematology : Acute Psychosis: A Presentation of Cyanocobalamin Defi ciency Megaloblastic Anemia

( Anurag Bahekar ),( Girish Bhageshwar Ramteke ),( Sanjay Dubey ),( Amith R ),( Ankit Meshram ),( Amit Agarwal ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1

Mental disturbances due to vitamin B12 deficiency have been reported previously as chief or sole symptoms, occasionally even preceding decrease of cobalamin in serum. Frank psychosis related to vitamin B12 defi ciency is considered very rare and has received little attention. We report a 28 yrs young female presenting with acute psychosis due to cyanocobalamine deficiency which reversed with treatment. Presentation was irrelevant talking, picking of clothes, inability to recognize people for 3 days. No fever, headache, vomiting, weakness, head trauma, drug intake, stressor or addiction. No past major illness, psychiatric illness or memory loss. Pt. had weaknes easy fatigability since 2 years was on vegetarian diet. Bladder bowel habits were regular. Hb 2. 9 gm/dl, thrombocytopenia 1 lakh/cumm, normal leucocytes, MCV-142. 7 fi , smear showed dimorphic picture, pencil cells, tear drop cells, anisopoikilocytosis, hypersegmented neutrophils. Diagnosis of megaloblastic anemia was made. CSF, CT head, electrolytes were normal. B12 level 77. 12 pmol/l (N200-800 pmol/l). Endoscopy- atrophic gastritis. Histology-atrophic gastriris. Antiparietal cell antibody-negative. Patient recovered fully within 3 days therapy with Inj. cyanacobalamin 1000 microgm i. m. with no need of antipsychotics at discharge. Biermer`s disease, also called acquired pernicious anemia, disorder of vitamin B12 absorption characterized by megaloblastic anemia, gastrointestinal symptoms, can lead to neurological abnormalities. Frequent in elderly, less in adults(15%), extremely rare inchildren, adolescents. It is asymptomatic for years, non-specifi c symptoms of anemia, atrophic gastritis. Possible mechanism for psychotic behaviour suggested by Hutto, reported cobalamin and folate participate in synthesis of monoamine neurotransmitters in brain by increasing BH4(tetrahydrobiopterin) synthesis. Treatment:Oral administration of high-dose vitamin B(12) (1-2 mg daily) as effective as intramuscular administration in correcting defi ciency. We recommend consideration be given to B-12 defi ciency as an etiological possibility in some cases of depression, organic psychosis, certain childhood-disorders and dementia.