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1.
Sci Rep ; 11(1): 17037, 2021 Aug 23.
Artículo en Inglés | MEDLINE | ID: mdl-34426607

RESUMEN

Two-dimensional layered materials offer the possibility to create artificial vertically stacked structures possessing an additional degree of freedom-the interlayer twist. We present a comprehensive optical study of artificially stacked bilayers (BLs) MoS[Formula: see text] encapsulated in hexagonal BN with interlayer twist angle ranging from 0[Formula: see text] to 60[Formula: see text] using Raman scattering and photoluminescence spectroscopies. It is found that the strength of the interlayer coupling in the studied BLs can be estimated using the energy dependence of indirect emission versus the A[Formula: see text]-E[Formula: see text] energy separation. Due to the hybridization of electronic states in the valence band, the emission line related to the interlayer exciton is apparent in both the natural (2H) and artificial (62[Formula: see text]) MoS[Formula: see text] BLs, while it is absent in the structures with other twist angles. The interlayer coupling energy is estimated to be of about 50 meV. The effect of temperature on energies and intensities of the direct and indirect emission lines in MoS[Formula: see text] BLs is also quantified.

2.
Med Hypotheses ; 144: 110133, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-32758904

RESUMEN

COVID-19 is an overwhelming pandemic which has shattered the whole world. Lung injury being the main clinical manifestation, it is likely to cause COPD (chronic obstructive pulmonary disease) and ARDS (acute respiratory distress syndrome). The possible cause behind this might be redox imbalance due to viral infection. Elevation in Glutathione (GSH) levels by administration of its promolecule might be effective. N-acetylcysteine is one such drug with potency to scavenge Reactive Oxygen Species, least side effects, and an effective precursor of glutathione. Consequently we hypothesize that N-acetylcysteine along with the conventional treatment may be treated as a potential therapeutic solution in cases of COVID-19 patients.


Asunto(s)
Acetilcisteína/uso terapéutico , COVID-19/tratamiento farmacológico , Glutatión/metabolismo , Acetilcisteína/química , Antioxidantes/uso terapéutico , Humanos , Oxidación-Reducción , Estrés Oxidativo , Enfermedad Pulmonar Obstructiva Crónica/virología , Especies Reactivas de Oxígeno/metabolismo , Síndrome de Dificultad Respiratoria/tratamiento farmacológico , Síndrome de Dificultad Respiratoria/virología
3.
J Assoc Physicians India ; 67(9): 87-90, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31561698

RESUMEN

Pachydermoperiostosis is a rare genetic disorder which commonly presents with clubbing, bone pains and skin changes. The treatment is mostly unsatisfactory. We tried bisphosphonates in our case with encouraging results. We suggest that parenteral bisphosphonates should be tried early in treatment of Pachydermoperiostosis.


Asunto(s)
Difosfonatos/uso terapéutico , Osteoartropatía Hipertrófica Primaria/tratamiento farmacológico , Humanos , Piel
4.
Tokai J Exp Clin Med ; 43(1): 24-29, 2018 Apr 20.
Artículo en Inglés | MEDLINE | ID: mdl-29637536

RESUMEN

OBJECTIVE: To study the endothelial dysfunction by measuring Nitric Oxide and Endothelin-1, and inter-genotypic variation of inducible Nitric Oxide Synthase gene (C150T) polymorphism among the study subjects. METHODS: 50 diagnosed cases of metabolic syndrome as per International Diabetes Federation (IDF) criteria and 50 healthy volunteers as control were enrolled. Nitric Oxide, Endothelin were measured and PCR-RFLP was done to identify the iNOS gene C150T polymorphism and its effect on serum nitric oxide levels. RESULTS: Subjects with metabolic syndrome had lower NO levels (16.3 ± 10.3 vs 20.9 ± 11 µM, p = 0.032) and higher endothelin (2.68 ± 1.73 vs 1.98 ± 0.82 fmol/ml, p = 0.011). The frequency of mutant T allele (10% vs 9%) was higher in cases. Serum nitric oxide levels were lower in cases expressing the Mutant T allele as compared to wild type C allele. However, the differences were not statistically significant. CONCLUSIONS: The present study demonstrated that iNOS C150T polymorphism did not show significant association with metabolic syndrome. Serum nitric oxide levels could be influenced by factors other than genetic polymorphism of iNOS gene (C150T) which cause endothelial dysfunction in metabolic syndrome and associated co-morbidities.


Asunto(s)
Endotelio/fisiopatología , Síndrome Metabólico/genética , Síndrome Metabólico/fisiopatología , Óxido Nítrico Sintasa de Tipo II/genética , Polimorfismo Genético , Alelos , Endotelina-1/sangre , Femenino , Estudios de Asociación Genética , Humanos , Masculino , Síndrome Metabólico/metabolismo , Óxido Nítrico/sangre
6.
Horm Mol Biol Clin Investig ; 34(1)2017 Dec 20.
Artículo en Inglés | MEDLINE | ID: mdl-29261514

RESUMEN

Background Metabolic syndrome (MetS) involves a cluster of cardiovascular risk factors, including abnormal lipids, insulin resistance and hypertension. The aim of the present study is to investigate associations between thyroid profile and the pro-thrombotic mediator, plasminogen activator inhibitor-1 (PAI-1), in MetS and identify associated biochemical markers. Materials and methods The present study was a case control study and consisted of 50 diagnosed cases of MetS and 50 healthy volunteers as controls. MetS cases were further divided into two groups based on the presence and absence of subclinical hypothyroidism (SCH). Data collected included demographic profile, clinical history and routine lab investigation. Special investigations included the thyroid function test and serum PAI-1 levels. Results The mean serum thyroid-stimulating hormone (TSH) levels were significantly higher in MetS cases as compared to controls (5.7 ± 1.2 mIU/L vs. 2.3 ± 1.6 mIU/L, p < 0.0001), although the mean triiodothyronine (T3) and thyroxine (T4) levels were comparable in two groups. The mean levels of serum PAI-1 were significantly higher in MetS cases as compared to controls(231 ± 87 ng/mL vs. 185 ± 96 ng/mL, p = 0.013). TSH and PAI-1 levels were positively correlated with various markers of MetS and negatively correlated with high-density lipoprotein (HDL). Conclusion The present study points towards the presence of thyroid dysfunction, in the form of subclinical hypothyroidism (SCH), in cases of MetS. In the presence of thyroid dysfunction, abnormal adipocytes may release adipokines, such as PAI-1, which lead to increased risk of thrombotic episodes in these patients. Hence, SCH should be appropriately managed.


Asunto(s)
Síndrome Metabólico/sangre , Inhibidor 1 de Activador Plasminogénico/sangre , Tirotropina/sangre , Adulto , Biomarcadores , Estudios de Casos y Controles , Femenino , Humanos , Hipotiroidismo/sangre , Hipotiroidismo/diagnóstico , Masculino , Síndrome Metabólico/diagnóstico , Persona de Mediana Edad , Modelos Biológicos , Pruebas de Función de la Tiroides
8.
Tokai J Exp Clin Med ; 42(2): 96-103, 2017 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-28681370

RESUMEN

INTRODUCTION: Metabolic Syndrome (Met S) is reported to be associated with sub clinical hypothyroidism (SCH). The aim of our study is to evaluate the role of SCH in association with adiponectin levels causing insulin resistance in metabolic syndrome. MATERIALS AND METHOD: We recruited 100 study subjects; out of which 50 were cases of Met S, which were further divided into two groups based on presence and absence of SCH and 50 were healthy controls. Serum insulin, serum T3, T4, TSH were measured by chemiluminisence based immunoassay and serum adiponectin was measured by ELISA. RESULTS: Mean TSH levels were significantly higher in Met S cases as compare to control. Out of 50 cases of Met S, 22 (44 %) had SCH. Mean serum adiponectin were significantly lower in Met S cases as compare to control. On Pearson's correlation analysis, TSH showed significant positive correlation with HOMA-IR and negative correlation with adiponectin levels. Strong association was found on the likelihood of low levels of adiponectin in Met S cases. CONCLUSIONS: Met S cases showed insulin resistance and underlying SCH. SCH in Met S may cause altered adipocytes physiology which is associated with decreased release of insulin sensitising adiponectin which may lead to insulin resistance and future development of type II DM and associated co morbidities. Therefore, Met S cases should be screened for SCH and adiponectin levels thereafter. Also, our recommendation is SCH should be treated appropriately to attenuate insulin resistance and development of type II DM in Met S.


Asunto(s)
Adiponectina/sangre , Diabetes Mellitus Tipo 2/etiología , Hipotiroidismo/complicaciones , Resistencia a la Insulina , Síndrome Metabólico/complicaciones , Adulto , Estudios de Casos y Controles , Femenino , Humanos , Hipotiroidismo/sangre , Masculino , Síndrome Metabólico/sangre , Persona de Mediana Edad , Tirotropina/sangre
9.
Rev Sci Instrum ; 88(6): 063507, 2017 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28668009

RESUMEN

A large plasma fireball is formed using a reverse biased planar sputter magnetron source. The magnetic field considerably reduces the contact area of the anode with the plasma and results in the formation of the fireball. Ions are extracted from the fireball using a large voltage cathode sheath of the grounded sample holder. The physical mechanism for the extraction of the ions from the fireball along with the effect of the sample holder on the fireball and the discharge current is discussed. The device is shown as a novel tool for developing nanodot patterns on a GaSb substrate without the use of additional ion source or power supplies. Variable nanodot patterns produced simply by the alteration of discharge conditions demonstrate unique surface wettability and reflection properties.

10.
Rom J Intern Med ; 55(4): 212-221, 2017 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-28640754

RESUMEN

INTRODUCTION: Endothelial dysfunction has been considered as one of the important factors in pathogenesis of Metabolic Syndrome (Met S). Subclinical hypothyroidism (SCH) has also been reported to be associated with Met S. The aim of our study is to evaluate the association of raised TSH with mediators of endothelial dysfunction in Met S with Subclinical hypothyroidism as compared to healthy controls. METHODS: Study population consisted of 100 subjects, out of which 50 were cases of Met S and 50 were healthy controls. Met S group were further divided into two, based on the presence & absence of SCH. Serum insulin, T3, T4, TSH were measured by chemiluminescence based immunoassay (CLIA). Serum nitric oxide (NO) levels were measured by Modified Griess's method and serum endothelin-1 (ET-1) levels were measured by ELISA. RESULTS: Out of 50 cases of Met S, SCH was diagnosed in 22. The mean serum TSH levels were significantly higher in Met S cases as compared to healthy controls (5.7 ± 1.2 µIU/mL vs. 2.3 ± 1.6 µIU/mL, P <0.0001). Mean serum NO levels were significantly lower in Met S cases as compared to healthy control (15.4 ± 10 µM vs. 21 ± 10 µM, p = 0.009). Mean serum ET-1 levels were significantly higher in Met S cases as compared to healthy controls (2.68 ± 1.7 fmol/mL vs. 2.1 ± 0.84 fmol/mL, p = 0.011). On Pearson's correlation analysis, TSH showed positive correlation with ET-1 (r = 0.341, p = 0.001) and negative correlation with NO (r = -0.331, p = 0.001). Binary logistic regression analysis showed that TSH, NO and ET-1 has significant odd's ratio for predicting Met S. CONCLUSION: Met S cases were screened for thyroid abnormalities and found to have 44% of SCH along with co-existing endothelial dysfunction. Raised TSH in SCH could cause endothelial dysfunction which may lead to Met S and associated co-morbidities. Present study gives new insight in linking endothelial dysfunction and raised TSH in Met S. Therefore, Met S cases should be screened for SCH and treated appropriately to attenuate endothelial dysfunction and associated comorbidities in Met S.


Asunto(s)
Endotelio Vascular/metabolismo , Hipotiroidismo/sangre , Síndrome Metabólico/sangre , Tirotropina/sangre , Adulto , Estudios de Casos y Controles , Endotelina-1/sangre , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Insulina/sangre , Luminiscencia , Masculino , Óxido Nítrico/sangre , Tiroxina/sangre , Triyodotironina/sangre
12.
Horm Mol Biol Clin Investig ; 24(3): 131-6, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26516933

RESUMEN

BACKGROUND: Metabolic syndrome (MetS) consists of a constellation of metabolic abnormalities that confer increased risk of cardiovascular disease (CVD) and diabetes mellitus (DM). Endothelial dysfunction is one of the key components of MetS which is caused by imbalance between vasodilatory substances like nitric oxide (NO) and vaso-constrictive substances like endothelin and prothrombotic factors like plasminogen activator inhibitor-1 (PAI-1). OBJECTIVE: To study the markers of endothelial dysfunction (NO and endothelin) and prothrombotic markers (PAI-1) among the study subjects. MATERIALS AND METHODS: We enrolled 50 diagnosed cases of MetS as per International Diabetes Federation (IDF) criteria and 50 healthy volunteers as controls. Clinical evaluation included anthropometric, routine biochemical, hematological, serum insulin, NO, endothelin and PAI-1 measurements. RESULTS: Subjects with MetS had higher insulin, endothelin and PAI-1 levels and low NO levels as compared to controls and the difference was found to be significant. The serum insulin levels were positively correlated with PAI-1 and endothelin, and negatively correlated with NO. CONCLUSION: Endothelial functional status as reflected by decreased NO and increased serum endothelin levels along with insulin resistance is seen in MetS. Moreover, higher serum level of PAI-1 also tilts towards a more prothrombotic milieu in the vascular endothelium. Hence endothelial dysfunction and prothrombotic markers may be used to guide for early diagnosis of cardiovascular disease and type 2 diabetes in patients with MetS.


Asunto(s)
Endotelio Vascular/fisiopatología , Síndrome Metabólico/fisiopatología , Biomarcadores , Humanos , Insulina/sangre , Resistencia a la Insulina , Sistema de Señalización de MAP Quinasas/fisiología , Óxido Nítrico/sangre , Óxido Nítrico Sintasa de Tipo III/sangre , Inhibidor 1 de Activador Plasminogénico/sangre
13.
Epilepsy Behav ; 49: 104-10, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25982265

RESUMEN

This paper reports the results of a preliminary search of the literature aimed at identifying the genetic mutations reported to be strongly associated with status epilepticus. Genetic mutations were selected for inclusion if status epilepticus was specifically mentioned as a consequence of the mutation in standard genetic databases or in a case report or review article. Mutations in 122 genes were identified. The genetic mutations identified were found in only rare conditions (sometimes vanishingly rare) and mostly in infants and young children with multiple other handicaps. Most of the genetic mutations can be subdivided into those associated with cortical dysplasias, inborn errors of metabolism, mitochondrial disease, or epileptic encephalopathies and childhood syndromes. There are no identified 'pure status epilepticus genes'. The range of genes underpinning status epilepticus differs in many ways from the range of genes underpinning epilepsy, which suggests that the processes underpinning status epilepticus differ from those underpinning epilepsy. It has been frequently postulated that status epilepticus is the result of a failure of 'seizure termination mechanisms', but the wide variety of genes affecting very diverse biochemical pathways identified in this survey makes any unitary cause unlikely. The genetic influences in status epilepticus are likely to involve a wide range of mechanisms, some related to development, some to cerebral energy production, some to diverse altered biochemical pathways, some to transmitter and membrane function, and some to defects in networks or systems. The fact that many of the identified genes are involved with cerebral development suggests that status epilepticus might often be a system or network phenomenon. To date, there are very few genes identified which are associated with adult-onset status epilepticus (except in those with preexisting neurological damage), and this is disappointing as the cause of many adult-onset status epilepticus cases remains obscure. It has been suggested that idiopathic adult-onset status epilepticus might often have an immunological cause but no gene mutations which relate to immunological mechanisms were identified. Overall, the clinical utility of what is currently known about the genetics of status epilepticus is slight and the findings have had little impact on clinical treatment despite what has been a very large investment in money and time. New genetic technologies may result in the identification of further genes, but if the identified genetic defects confer only minor susceptibility, this is unlikely to influence therapy. It is also important to recognize that genetics has social implications in a way that other areas of science do not. This article is part of a Special Issue entitled "Status Epilepticus".


Asunto(s)
Mutación/genética , Estado Epiléptico/diagnóstico , Estado Epiléptico/genética , Adulto , Niño , Preescolar , Epilepsia/diagnóstico , Epilepsia/genética , Humanos , Lactante , Convulsiones/diagnóstico , Convulsiones/genética
14.
Diabetes Metab Syndr ; 8(3): 152-5, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-25042166

RESUMEN

AIMS: The metabolic syndrome (MS) consists of a constellation of metabolic abnormalities that confer increased risk of cardiovascular disease (CVD) and diabetes mellitus (DM). Visceral adipose tissue actively produces a variety of adipokines that interact in various obesity related disorders such as metabolic syndrome, diabetes mellitus and heart diseases. Adiponectin has protective role in the vascular physiology while Plasminogen Activator Inhibitor-1 (PAI-1) has a prothrombotic and consequent deleterious effect on the endothelium. We attempted to assess the putative imbalance if any between these two mediators in subjects with metabolic syndrome in the Indian context. MATERIALS AND METHODS: We enrolled 50 diagnosed case of metabolic syndrome as per International Diabetes Federation (IDF) criteria and 50 healthy volunteers as control. Clinical evaluation included anthropometric, routine biochemical analysis as well as adiponectin and PAI-1 measurement. RESULT: Subject with MS had significantly lower adiponectin (9.8±1.0 vs 16±1.1 µg/ml) and higher PAI-1 (232±87 vs 185±96 ng/ml). A statistically significant correlation was observed between adiponectin and HDL levels (r=0.388, p=0.005). CONCLUSION: Subjects with MS have lower adiponectin and higher PAI-1 levels as compared to controls. The subsequent tilt toward a more prothrombotic and pro inflammatory milieu in the vascular endothelium may be pathognomonic of metabolic syndrome. This understanding of the still undiscovered subtle vascular alterations may help in the better management of obesity and MS.


Asunto(s)
Adiponectina/metabolismo , Enfermedades Cardiovasculares/sangre , Diabetes Mellitus Tipo 2/sangre , Hemoglobina A Glucada/metabolismo , Grasa Intraabdominal/metabolismo , Síndrome Metabólico/sangre , Inhibidor 1 de Activador Plasminogénico/metabolismo , Adulto , Biomarcadores/metabolismo , Glucemia/metabolismo , Enfermedades Cardiovasculares/metabolismo , Enfermedades Cardiovasculares/fisiopatología , Enfermedades Cardiovasculares/prevención & control , Estudios de Casos y Controles , Diabetes Mellitus Tipo 2/metabolismo , Diabetes Mellitus Tipo 2/fisiopatología , Diabetes Mellitus Tipo 2/prevención & control , Femenino , Homeostasis , Humanos , Mediadores de Inflamación/metabolismo , Resistencia a la Insulina , Péptidos y Proteínas de Señalización Intercelular , Masculino , Síndrome Metabólico/metabolismo , Síndrome Metabólico/fisiopatología , Persona de Mediana Edad
15.
J Nanosci Nanotechnol ; 14(7): 5288-92, 2014 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24758018

RESUMEN

In present work, pure and copper (Cu) doped SnO2 nanowires have been synthesized by thermal evaporation process at ambient pressure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated the growth of wire-like pure and Cu-doped SnO2 nanostructures with their length of about 50 microm and 80 microm whereas transverse dimension of about 50-80 nm and 20-50 nm, respectively. The HRTEM and SAED pattern reveals the growth of single crystalline Cu-doped SnO2 nanowire. The EDX confirms that Cu has been doped in the SnO2 nanowires and atomic fraction of Cu in nanowires is about 2.5 at% when concentration of CuO in starting source powder is 50 wt%. X-ray diffraction showed that Cu gets incorporated into the SnO2 lattice and also confirms their tetragonal rutile structure. For comparative study of gas sensing properties of pure and Cu-doped SnO2 nanowire, isolated single nanowire based sensors have been fabricated for detection of ethanol gas. The doping of Cu was found to enhance the ethanol sensitivity of SnO2 nanowire based sensors and the sensor response improves with increase in ethanol concentration. This sensing behaviour offers a suitable application of the Cu-doped SnO2 nanowire sensor for detection of ethanol gas.

16.
Physiol Res ; 62(2): 197-203, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23234414

RESUMEN

Nitric oxide (NO) may play a role in the pathophysiology of excitotoxicity. It is also possible that increase in Ca²âº overload and NO-mediated events are involved in neuronal loss during excitotoxicity. Using nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d) histochemistry, we have investigated the effects of melatonin on NADPH-d positive hippocampal neurons after kainic acid (KA) induced excitotoxicity in female rats of Wistar strain. Cytosolic Ca²âº (free calcium) in all the respective experimental groups was also studied. Kainic acid was administered, with a single dose of 10 mg/kg/bw (body weight) to the animals. KA treated rats were given melatonin at a dose of 20 mg/kg/bw (for 14 day). On the last day of treatment, animals were transcardially perfused with 4 % paraformaldehyde under deep thiopental anaesthesia. Cryostat sections (20 microm) were cut and stained for NADPH-d positive neurons. KA exposed animals showed a significantly increased number of NADPH-d positive neurons in the dorsal and ventral blade of the dentate gyrus (DG), hilus, CA1 and CA3 area of hippocampus, with a parallel increase in intracellular free Ca²âº ion concentration, as compared to the control group. KA + melatonin-treated animal groups showed reduced number of NADPH-d positive neurons in DG, hilus, CA1 and CA3 areas and a decline in cytosolic Ca²âº concentration, as compared to KA treated group. Our study suggests that the enhanced levels of cytosolic Ca²âº and nitric oxide (NO) play an important role in kainate induced excitotoxicity. Inhibition of NO production may be another means whereby melatonin can reduce oxidative damage and seems to play important role in neuroprotection.


Asunto(s)
Agonistas de Aminoácidos Excitadores/farmacología , Depuradores de Radicales Libres/farmacología , Hipocampo/citología , Hipocampo/efectos de los fármacos , Ácido Kaínico/farmacología , Melatonina/farmacología , Neuronas/efectos de los fármacos , Neuronas/fisiología , Óxido Nítrico/fisiología , Animales , Conducta Animal/efectos de los fármacos , Calcio/metabolismo , Recuento de Células , Femenino , Inmunohistoquímica , NADPH Deshidrogenasa/metabolismo , Óxido Nítrico Sintasa/metabolismo , Ratas , Ratas Wistar
17.
Diabetes Metab Syndr ; 6(2): 106-9, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-23153979

RESUMEN

AIMS: Endothelial dysfunction is thought to be a significant risk factor for cardiovascular disease. This study determined the role of endothelial nitric oxide synthase (eNOS) Glu298Asp polymorphism and intergenotypic variation of plasma nitric oxide (NO) levels in coronary artery disease (CAD) patients with type 2 diabetes mellitus (DM). METHODS: This case-control study included 28 documented CAD patients with type 2 DM and 32 non-diabetic patients with CAD. Fifty healthy volunteers without any major cardiovascular risk factors served as controls. NO was estimated by modified Griess method. The eNOS gene polymorphism was studied by amplifying DNA by PCR and digesting with BanII restriction enzyme. Restriction fragment length polymorphism was studied by using a gel documentation system. RESULTS: The genotype frequencies for Glu298Asp (GT) genotype were 10.71% in diabetic CAD patients, 28.1% in non-diabetic CAD patients and 12% in controls. The T allele frequency was higher in the non-diabetic CAD group (14%) as compared with the diabetic CAD (5.4%) and control group (6%). NO level was significantly lower in non-diabetic CAD patients (10.25 mmol/L) but not in diabetic CAD patients (13.89 mmol/L) as compared to controls (16.78 mmol/L). CONCLUSION: Glu298Asp polymorphism is not the mediator of increased incidence of CAD in diabetic patients.


Asunto(s)
Aterosclerosis/enzimología , Diabetes Mellitus Tipo 2/enzimología , Angiopatías Diabéticas/enzimología , Lípidos/sangre , Óxido Nítrico Sintasa de Tipo III/genética , Óxido Nítrico/sangre , Polimorfismo de Nucleótido Simple , Ácido Aspártico , Aterosclerosis/epidemiología , Aterosclerosis/genética , Biomarcadores/sangre , Estudios de Casos y Controles , Diabetes Mellitus Tipo 2/epidemiología , Diabetes Mellitus Tipo 2/genética , Angiopatías Diabéticas/epidemiología , Angiopatías Diabéticas/genética , Progresión de la Enfermedad , Femenino , Genotipo , Ácido Glutámico , Humanos , India/epidemiología , Masculino , Persona de Mediana Edad , Óxido Nítrico Sintasa de Tipo III/sangre , Polimorfismo de Longitud del Fragmento de Restricción , Factores de Riesgo
18.
J Nanosci Nanotechnol ; 12(10): 7903-8, 2012 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-23421154

RESUMEN

We report on controlling the morphology of tin oxide (SnO2) nanostructures and the study of the effect of surface morphology on structural and optical properties of SnO2 nanostuctures. In present work, Tin oxide (SnO2) nanostructures such as nanowires and nanorods have been grown by thermal evaporation of SnO2 powder. To demonstrate the effect of different substrates on the morphology of grown SnO2 nanostructures, the thermal evaporation of SnO2 powder was carried out on Si and gold catalyzed Si (Au/Si) substrates. The scanning-electron-microscopic analysis shows the growth of SnO2 nanowires on Au/Si substrate and growth of SnO2 nanorods on Si substrate. The scanning-and transmission-electron-microscopic analysis shows that the diameter of SnO2 nanowires and nanorods are about 70 nm and 95 nm respectively and their length is about 80 microm and 30 microm respectively. The vapor-liquid-solid (VLS) growth of SnO2 nanowires and vapor-solid (VS) growth of SnO2 nanorods is also confirmed with the help of TEM and EDX spectra. The synthesized SnO2 nanowires show tetragonal rutile structure of SnO2, whereas SnO2 nanorods show tetragonal rutile as well as cassiterite structure of SnO2. UV-Vis absorption spectra showed the optical band gaps of 4.1 eV and 3.8 eV for the SnO2 nanowires and the nanorods, respectively. The SnO2 nanowires and nanorods show photoluminescence with broad emission peaks centred at around 600 nm and 580 nm respectively. Raman spectra of SnO2 nanowires shows three Raman shifts (478, 632, 773 cm(-1)) corresponding to Eg, A1g and B2g vibration modes, whereas in Raman spectra of SnO2 nanorods, A1g peak is dramatically reduced and the B2g mode is totally quenched.

19.
Ann Neurosci ; 19(1): 52-4, 2012 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25205964

RESUMEN

Arachnoid cysts are a congenital disorder, and most cases begin during infancy; however, onset may be delayed until adolescence. Here we present an unusual case of atypical Paraplegia with Lymphoedema, with onset during adolescence and rapid progression in a young female patient who showed the characteristic appearance of cyst on magnetic resonance imaging (MRI) of spinal cord. This report intends to highlight paraplegia with lymphoedema, as a rare cause of spinal cord compression in pediatric population along with congenital defect manifestations and an interesting radiology finding of the disease.

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