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1.
J Gastroenterol Hepatol ; 39(3): 489-495, 2024 Mar.
Article in English | MEDLINE | ID: mdl-38095156

ABSTRACT

BACKGROUND AND AIM: While European Society of Pediatric Gastroenterology Hepatology and Nutrition advocates a no-biopsy pathway for the diagnosis of celiac disease (CeD) in children if IgA anti-tissue transglutaminase antibody (anti-tTG ab) titer is ≥10-fold upper limit of normal (ULN) and have a positive IgA anti-endomysial antibody (EMA); the data for anti-tTG Ab titer-based diagnosis of CeD in adults is still emerging. We planned to validate if IgA anti-tTG Ab titer ≥10-fold predicts villous abnormalities of modified Marsh grade ≥2 in Asian adult patients with CeD. METHODS: We recruited 937 adult patients with positive anti-tTG Ab from two databases, including AIIMS Celiac Clinic and Indian National Biorepository. The diagnosis of definite CeD was made on the basis of a positive anti-tTG Ab and the presence of villous abnormalities of modified Marsh grade ≥2. RESULTS: Of 937 adult patients with positive anti-tTG Ab, 889 (91.2%) showed villous abnormalities of modified Marsh grade ≥2. Only 47.6% of 889 adults with CeD had anti- tTG Ab titers of ≥10-fold. The positive predictive value (PPV) and specificity of anti tTG Ab titer ≥10-fold for predicting modified Marsh grade ≥2 were 99.8% and 98%, respectively. At anti-tTG Ab titer ≥11-fold, specificity and PPV were 100% for predicting villous abnormalities of modified Marsh grade ≥2. CONCLUSIONS: Approximately 50% of adults with CeD may benefit from the no biopsy pathway, reducing the health burden and risks of gastroscopy/anesthesia.


Subject(s)
Celiac Disease , Adult , Humans , Autoantibodies , Celiac Disease/pathology , GTP-Binding Proteins , Immunoglobulin A , Protein Glutamine gamma Glutamyltransferase 2 , Retrospective Studies , Sensitivity and Specificity , Transglutaminases
2.
Indian J Public Health ; 68(2): 302-304, 2024 Apr 01.
Article in English | MEDLINE | ID: mdl-38953823

ABSTRACT

Knowledge of the consequences of uncontrolled diabetes mellitus and hypertension on various body organs among health workers is necessary to educate patients. Body mapping is a tool used for exploring perceptions as a part of qualitative research. This study assesses the perceptions of health-care workers on the effects of uncontrolled diabetes mellitus and hypertension on the human body using the body mapping technique. All 19 staff members of an Urban Primary Health Center were asked to draw a human body and map the parts affected by uncontrolled diabetes mellitus and hypertension. The mean age of the participants was 35.42 ± 10.54 years, and median years of work experience were 4 (3, 7) years. Fourteen (74%) participants had mapped kidneys and 11 (58%) participants had mapped head/brain indicating stroke to indicate damage due to uncontrolled diabetes mellitus and hypertension. Only 7 (37%) and 4 (26%) participants perceived that feet and eyes could be affected.


Subject(s)
Diabetes Mellitus , Health Personnel , Hypertension , Humans , Hypertension/psychology , Adult , Male , Female , Diabetes Mellitus/psychology , Health Personnel/psychology , Middle Aged , Perception , Attitude of Health Personnel , India , Health Knowledge, Attitudes, Practice
3.
J Environ Manage ; 338: 117761, 2023 Jul 15.
Article in English | MEDLINE | ID: mdl-37030142

ABSTRACT

Decreasing greenhouse gas (GHG) emissions and enhancing soil carbon (C) sequestration in cropland are necessary to achieve carbon neutrality at national scale. The major objective of this study is to quantify the GHG mitigation potential of adopted climate resilient (CR) practices in CR villages using Ex-ACT tool developed by Food and Agriculture Organization (FAO). Intensively cultivated area of Punjab and Haryana was selected for carrying out this study. In both the states, villages were selected by considering the climate for past 30 years. In the selected villages, a set of CR practices were implemented in annuals, perennials, irrigated rice, fertilizer use, land use change and livestock and quantified the GHG mitigation potential in these villages for next twenty years. The tool predicted that the CR practices adopted were successful in enhancing the overall sink (carbon balance) in all the study villages. The villages of Punjab had recorded higher mitigation potential as compared to the villages of Haryana. The overall sink potential in these villages ranged from -354 to -38309 Mg CO2-eq. The change in sink potential varied from 3.16 to 112% with lowest in Radauri and highest in Badhauchhi kalan village. The sink potential got doubled in Badhauchhi kalan village due to stopping rice straw burning and increase in area under perennials by 25%. The source potential varied from 6.33 to -7.44% across the study villages. Even with the implementation of NICRA, there was increase in source by 5.58 and 6.33% in Killi Nihal Singh Wala and Radauri due to irrigated rice, land use change and livestock. Majorly, rice straw burning was seen in most of the study villages, yet, with proper residue management and adoption of CR practices (mainly intermittent flooding) in rice cultivation resulted in emissions reduction up to 5-26% with enhanced productivity up to 15-18%, which can be considered for scaling up. Fertilizer management reduced the emissions by average of 13% across the study villages. Farm gate emission intensity per ton of milk and rice recorded highest emission intensity compared to annuals and perennials suggesting strict implementation of CR practices in rice cultivation and livestock sector. Implementation and scaling up of CR practices could potentially reduce the emissions and make the village C negative in intensive rice-wheat production system.


Subject(s)
Greenhouse Gases , Oryza , Greenhouse Effect , Carbon/analysis , Fertilizers , Agriculture/methods , Soil/chemistry
4.
Phys Rev Lett ; 122(2): 025001, 2019 Jan 18.
Article in English | MEDLINE | ID: mdl-30720299

ABSTRACT

The propagation of fast electron currents in near solid-density media was investigated via proton probing. Fast currents were generated inside dielectric foams via irradiation with a short (∼0.6 ps) laser pulse focused at relativistic intensities (Iλ^{2}∼4×10^{19} W cm^{-2} µm^{2}). Proton probing provided a spatially and temporally resolved characterization of the evolution of the electromagnetic fields and of the associated net currents directly inside the target. The progressive growth of beam filamentation was temporally resolved and information on the divergence of the fast electron beam was obtained. Hybrid simulations of electron propagation in dense media indicate that resistive effects provide a major contribution to field generation and explain well the topology, magnitude, and temporal growth of the fields observed in the experiment. Estimations of the growth rates for different types of instabilities pinpoints the resistive instability as the most likely dominant mechanism of beam filamentation.

5.
Am J Gastroenterol ; 111(1): 115-23, 2016 Jan.
Article in English | MEDLINE | ID: mdl-26729543

ABSTRACT

OBJECTIVES: Although celiac disease (CeD) affects 1% of people in the northern part of India, it is believed to be uncommon in the southern and northeastern parts because of significant differences in dietary pattern and ethnicity. We estimated the prevalence of CeD in these three populations. In a subset, we also investigated differences in the prevalence of HLA-DQ 2/8 allelotype and dietary grain consumption. METHODS: A total of 23,331 healthy adults were sampled from three regions of India-northern (n=6207), northeastern (n=8149), and southern (n=8973)-and screened for CeD using IgA anti-tissue transglutaminase antibody. Positive tests were reconfirmed using a second ELISA. CeD was diagnosed if the second test was positive and these participants were further investigated. A subsample of participants was tested for HLA-DQ2/-DQ8 and underwent detailed dietary evaluation. RESULTS: Age-adjusted prevalence of celiac autoantibodies was 1.23% in northern, 0.87% in northeastern, and 0.10% in southern India (P<0.0001). Prevalence of CeD and latent CeD, respectively, was 8.53/1,000 and 3.70/1,000 in northern, 4.66/1,000 and 3.92/1,000 in northeastern, and 0.11/1,000 and 1.22/1,000 in the southern part. The population prevalence of genes determining HLA-DQ2 and/or -DQ8 expression was 38.1% in northern, 31.4% in northeastern, and 36.4% in southern India. Mean daily wheat intake was highest in northern (455 g) compared with northeastern (37 g) or southern part (25 g), whereas daily rice intake showed an inverse pattern. CONCLUSIONS: CeD and latent CeD were most prevalent in northern India and were the least in southern India. The prevalence correlated with wheat intake and did not reflect differences in the genetic background.


Subject(s)
Celiac Disease/epidemiology , Adolescent , Adult , Diet , Edible Grain , Female , Humans , India/epidemiology , Male , Middle Aged , Prevalence , Young Adult
6.
J Phys Chem A ; 119(8): 1267-78, 2015 Feb 26.
Article in English | MEDLINE | ID: mdl-25633537

ABSTRACT

The ultrafast photophysical characterization of 5,10,15,20-meso-tetrakis pentafluorophenyl porphyrin (H2F20TPP) in 4:1 dichloromethane (DCM) and tetrahydrofuran (THF) solution has been done in the femtosecond-picosecond time domain, by combining fluorescence up-conversion and femtosecond transient absorption spectroscopy. Fluorescence up-conversion studies on H2F20TPP were done demonstrating fluorescence dynamics over the whole spectral range from 440 to 650 nm when excited at 405 nm, 360.5 cm(-1) excess vibrational energy of Soret band (411 nm). Single-exponential decay with ∼160 ± 50 fs lifetime of Soret fluorescence (also called S2 fluorescence or B band fluorescence) at around 440 nm was observed. On going from 440 nm, S2 fluorescence to S1 fluorescence, (Q-band) around 640 nm (wavelength of 0-0 transition in the stationary spectrum), single-exponential fluorescence time profile turns into a multiexponential time profile and it could be resolved critically into five-exponential components. An ultrafast rise component with ∼160 ± 50 fs followed by two decay components: a very fast decay component with 200 ± 50 fs time constant and another relatively slower 1.8 ± 0.5 ps decay component. Next, a very prominent rise component with 105 ± 30 ps lifetime followed by long-lived 10 ns decay component. The initial rise of S1 (Q-band) fluorescence around 640 nm agreed with the decay time of S2 (Soret or B band) fluorescence indicates that internal conversion (IC) from relaxed S2 to vibrationally excited S1 occurs in the ∼160 fs time scale and subsequent very fast decay with 200 fs time constant, which is assigned to be intramolecular vibrational dephasing or redistribution. The 1.8 ps decay component of S1 fluorescence is attributed to be "hot" fluorescence from vibrationally excited S1 state, and it reveals the vibrational relaxation time induced by elastic or quasi-elastic collision with solvent molecules. The 105 ps rise component is the creation time of the thermally equilibrated S1 state population, and it could be attributed either to an excited state conformational relaxation/intramolecular charge transfer or a molecular cooling process by dissipation of excess energy within the solvent by inelastic collision. Finally, the decay of equilibrated S1(Qx state) occurs on 10 ns to S0 by fluorescence. Femtosecond resolved transient absorption studies on H2F20TPP in the spectral range 390-620 nm following both S2 (Soret band) and S1 (Qx) band excitation have been done and they complement the observations found in fluorescence up-conversion studies. The stimulated emission (SE) kinetics observed at 640 nm, S1 emission peak, in 2-10 ps time domain rebuilds a dynamic similar to that observed by fluorescence up-conversion study. The transient absorption kinetics upon S1 excitation were observed mainly to be biexponential with decay constants 105 ps and 10 ns, respectively. At a long time window (6 ns), a long-lived rise component could be predicted followed by two long-lived decay components for both the excitations in between 450 and 500 nm probe wavelengths. The lifetimes of these components were longer-lived than were possible to exactly measure using our existing femtosecond transient absorption system. However, this apparent rise component is assigned to be a Tn ← T1 transition, and the longest decay component is attributed to the lifetime of the T1 state.

7.
Curr Gastroenterol Rep ; 16(3): 376, 2014 Mar.
Article in English | MEDLINE | ID: mdl-24562469

ABSTRACT

Oral rehydration solution (ORS) was established as the cornerstone of therapy for dehydration secondary to acute infectious diarrhea approximately 40 years ago. The efficacy of ORS is based on the ability of glucose to stimulate Na and fluid absorption in the small intestine via a cyclic AMP-independent process. Despite the establishment that ORS is the primary reason for the substantial reduction in morbidity and mortality from diarrhea in children in developing countries, the use of ORS has lagged for many reasons. This review highlights efforts to establish a major reformulation of ORS following the demonstration that short-chain fatty acids (SCFA) stimulate colonic Na and fluid absorption by a cyclic AMP-independent mechanism. The addition of high-amylose maize starch (HAMS), a microbially-fermentable (or 'resistant') starch, to ORS results in delivery of non-absorbed carbohydrate to the colon where it is fermented to SCFA. To date, three randomized controlled trials with a HAMS-ORS in south India have demonstrated a substantial decrease in diarrhea duration in both adults and children hospitalized for acute diarrhea. Significant efforts are now underway to establish this dual-action, modified HAMS-hypoosmolar ORS solution as the standard ORS for the treatment of dehydration from acute diarrhea.


Subject(s)
Diarrhea/therapy , Fluid Therapy/methods , Rehydration Solutions/therapeutic use , Acute Disease , Chemistry, Pharmaceutical , Fatty Acids, Volatile/physiology , Fluid Therapy/trends , Humans , Rehydration Solutions/chemistry
8.
Phys Chem Chem Phys ; 16(42): 23173-81, 2014 Nov 14.
Article in English | MEDLINE | ID: mdl-25253044

ABSTRACT

Enhanced reductive fluorescence quenching of meso-tetrakis-5,10,15,20-pentafluorophenyl porphyrin (H2F20TPP) by two different phenols, 4-methoxy phenol (4-MeOPhOH) and 2,6-dimethoxy phenol (2,6-DiMeOPhOH) in the presence of various pyridine bases in dichloromethane solution is studied using steady state and time resolved fluorescence spectroscopic methods by employing time correlated single photon counting (TCSPC) and fluorescence up-conversion techniques. An enhanced quenching behaviour of H2F20TPP is observed when phenols are hydrogen bonded to various pyridine bases. Quenching observed in the steady state and time resolved studies in the nanosecond time domain follows second order kinetics and generates quenching rate constants and hydrogen bond equilibrium constants, the latter of which agree quite closely with those obtained from independent spectroscopic measurements. A significant kinetic deuterium isotope effect is observed, indicating the importance of proton movement in the quenching processes. This quenching effect is attributed to be due to a tri-molecular transition state involving H2F20TPP and a hydrogen bonded phenol complex, in which electron transfer from phenol to excited H2F20TPP is concerted with proton movement from the phenol to hydrogen bonded base. Observed quenching behaviours are rationalized by invoking diffusion controlled proton coupled electron transfer. Fluorescence up-conversion studies in the 100 ps time domain confirm ultrafast PCET for 4-MeOPhOH and base pairs which fall in a non-diffusive regime.

9.
Indian J Med Res ; 139(1): 19-26, 2014 Jan.
Article in English | MEDLINE | ID: mdl-24604038

ABSTRACT

Probiotics are defined as live microorganisms which, when ingested in adequate amounts, confer health benefits on the host. Chronic diseases such as diabetes, non-alcoholic fatty liver disease, coronary artery disease, a variety of chronic inflammatory disorders with an immune basis, and some forms of cancer are increasing in incidence around the world and in India, and may be attributable in part to rapid changes in our lifestyle. There is considerable public interest in India in the consumption of probiotic foods. This brief review summarizes the background of the gut microbiota, the immunological reactions induced by these, the evidence linking the microbiota to health outcomes, and the evidence linking the use of probiotics for amelioration of chronic lifestyle diseases.


Subject(s)
Bifidobacterium/metabolism , Chronic Disease/prevention & control , Gastrointestinal Tract/drug effects , Probiotics/therapeutic use , Chronic Disease/epidemiology , Cost of Illness , Food , Gastrointestinal Tract/microbiology , Humans , India , Life Style , Microbiota/drug effects
10.
Trop Gastroenterol ; 35 Suppl 1: S9-11, 2014 Aug.
Article in English | MEDLINE | ID: mdl-25735120

ABSTRACT

The first attack of ulcerative colitis can be acute and severe in 2-50% of patients. Acute severe colitis needs to be distinguished from various other conditions including severe infective colitis and ischaemic colitis. In those treated traditionally with intravenous corticosteroids, 30-40% require colectomy within a period of 6 months. The use of rescue therapies has modified this paradigm. Cyclosporine use averts early colectomy but most of these patients eventually require colectomy. The use of infliximab also averts early colectomy, but its long-term efficacy remains uncertain. Data suggests that the colectomy rate has reduced in recent years. Whether this is due to the increasing use of early aggressive therapy or whether or is part of the natural evolution of the disease, remains to be determined.


Subject(s)
Colitis, Ulcerative/diagnosis , Colitis, Ulcerative/therapy , Acute Disease , Adrenal Cortex Hormones/therapeutic use , Antibodies, Monoclonal/therapeutic use , Colectomy , Cyclosporine/therapeutic use , Diagnosis, Differential , Disease Progression , Gastrointestinal Agents/therapeutic use , Humans , Immunosuppressive Agents/therapeutic use , Infliximab , Risk Factors
11.
Lancet Reg Health Southeast Asia ; 22: 100361, 2024 Mar.
Article in English | MEDLINE | ID: mdl-38482152

ABSTRACT

Background: There are limited global data on head-to-head comparisons of vaccine platforms assessing both humoral and cellular immune responses, stratified by pre-vaccination serostatus. The COVID-19 vaccination drive for the Indian population in the age group 18-45 years began in April 2021 when seropositivity rates in the general population were rising due to the delta wave of COVID-19 pandemic during April-May 2021. Methods: Between June 30, 2021, and Jan 28, 2022, we enrolled 691 participants in the age group 18-45 years across four clinical sites in India. In this non-randomised and laboratory blinded study, participants received either two doses of Covaxin® (4 weeks apart) or two doses of Covishield™ (12 weeks apart) as per the national vaccination policy. The primary outcome was the seroconversion rate and the geometric mean titre (GMT) of antibodies against the SARS-CoV-2 spike and nucleocapsid proteins post two doses. The secondary outcome was the frequency of cellular immune responses pre- and post-vaccination. Findings: When compared to pre-vaccination baseline, both vaccines elicited statistically significant seroconversion and binding antibody levels in both seronegative and seropositive individuals. In the per-protocol cohort, Covishield™ elicited higher antibody responses than Covaxin® as measured by seroconversion rate (98.3% vs 74.4%, p < 0.0001 in seronegative individuals; 91.7% vs 66.9%, p < 0.0001 in seropositive individuals) as well as by anti-spike antibody levels against the ancestral strain (GMT 1272.1 vs 75.4 binding antibody units/ml [BAU/ml], p < 0.0001 in seronegative individuals; 2089.07 vs 585.7 BAU/ml, p < 0.0001 in seropositive individuals). As participants at all clinical sites were not recruited at the same time, site-specific immunogenicity was impacted by the timing of vaccination relative to the delta and omicron waves. Surrogate neutralising antibody responses against variants-of-concern including delta and omicron was higher in Covishield™ recipients than in Covaxin® recipients; and in seropositive than in seronegative individuals after both vaccination and asymptomatic infection (omicron variant). T cell responses are reported from only one of the four site cohorts where the vaccination schedule preceded the omicron wave. In seronegative individuals, Covishield™ elicited both CD4+ and CD8+ spike-specific cytokine-producing T cells whereas Covaxin® elicited mainly CD4+ spike-specific T cells. Neither vaccine showed significant post-vaccination expansion of spike-specific T cells in seropositive individuals. Interpretation: Covishield™ elicited immune responses of higher magnitude and breadth than Covaxin® in both seronegative individuals and seropositive individuals, across cohorts representing the pre-vaccination immune history of most of the vaccinated Indian population. Funding: Corporate social responsibility (CSR) funding from Hindustan Unilever Limited (HUL) and Unilever India Pvt. Ltd. (UIPL).

12.
Rheumatol Int ; 33(8): 2149-52, 2013 Aug.
Article in English | MEDLINE | ID: mdl-22258457

ABSTRACT

The aim of our study was to determine whether the pattern of arthropathy in patients with suspected enteropathic arthritis bore any relation to their gut histology and specifically to chronic nonspecific gut inflammation. Records of 39 patients with suspected enteropathic arthritis from rheumatology clinic between January 2006 and December 2008 who had undergone ileocolonoscopic biopsy were analyzed retrospectively. Patients were grouped into 3 categories, namely those with normal bowel histology, those with mild nonspecific chronic changes, and those with histology suggestive of inflammatory bowel disease. Patients with nonspecific chronic gut inflammation had higher occurrence of axial involvement with or without peripheral articular involvement as compared to those with normal gut histology (8/9 vs. 10/21, P = 0.049), and this pattern was similar to that in patients with IBD. Wrist joint involvement was more common in patients with normal bowel histology (12/21) than the other two groups (P = 0.003). All groups had fared well on follow up while taking treatment with sulphasalazine and methotrexate.


Subject(s)
Inflammatory Bowel Diseases/pathology , Intestines/pathology , Joint Diseases/pathology , Adult , Female , Humans , India , Inflammatory Bowel Diseases/complications , Joint Diseases/complications , Male , Middle Aged
13.
Cureus ; 15(5): e39040, 2023 May.
Article in English | MEDLINE | ID: mdl-37323366

ABSTRACT

Aim and Objective: Oral submucous fibrosis (OSMF) is a potentially premalignant disorder affecting the oral cavity and its adjacent structures. The present study was aimed at a comparative evaluation of eustachian tube (ET) changes in OSMF patients using audiometry and cone-beam computed tomography (CBCT). Materials and Methods: A total of 40 patients who were clinically diagnosed with OSMF were taken for the study and were graded into clinical and functional staging. After grading, the patients were subjected to audiometry to evaluate their hearing deficit. Subsequently, the patients were subjected to CBCT analysis for the evaluation of the length and volume of the ET. The length of ET was measured in the axial sections of the full-face CBCT images taken at the level of the root tip of the upper first molar. The radiolucency from the nasopharyngeal opening to the maximum distance was considered. The volume of ET was measured using third-party software (ITK-SNAP) in the radiolucent area. Result: The age group in which a higher number of OSMF cases were seen was between 41 and 50 years. There was mild to moderate hearing loss observed in the right and/or left ear, with little variation between right and left ear changes in audiometry. The CBCT analysis did not show a significant difference in the mean length of the eustachian tube when comparing OSMF cases with normal. However, as the disease worsened, the length on the right and left sides significantly decreased. Additionally, there was no statistically significant difference in the mean eustachian tube volume between disease cases and controls. According to the clinical subgrades, the overall volume decreased from lower grade to higher grade, but there was no discernible difference between the left and right ear. The volume on function sub-grading between the right and left ear, however, was significantly reduced. Thus, the length and volume of ET decreased as the disease severity increased, but the mild to moderate hearing loss found in different clinical and functional grades of OSMF cases was not statistically significant. Conclusion: Therefore, from the present study, it can be concluded that all OSMF cases should be evaluated for hearing deficit, and imaging of the eustachian tube should be part of the OSMF assessment for morphological changes of the ET that may cause hearing deficit.

14.
Phys Rev Lett ; 108(13): 135001, 2012 Mar 30.
Article in English | MEDLINE | ID: mdl-22540706

ABSTRACT

The development of current instabilities behind the front of a cylindrically expanding plasma has been investigated experimentally via proton probing techniques. A multitude of tubelike filamentary structures is observed to form behind the front of a plasma created by irradiating solid-density wire targets with a high-intensity (I ~ 10(19) W/cm(2)), picosecond-duration laser pulse. These filaments exhibit a remarkable degree of stability, persisting for several tens of picoseconds, and appear to be magnetized over a filament length corresponding to several filament radii. Particle-in-cell simulations indicate that their formation can be attributed to a Weibel instability driven by a thermal anisotropy of the electron population. We suggest that these results may have implications in astrophysical scenarios, particularly concerning the problem of the generation of strong, spatially extended and sustained magnetic fields in astrophysical jets.

15.
Phys Rev Lett ; 109(18): 185006, 2012 Nov 02.
Article in English | MEDLINE | ID: mdl-23215290

ABSTRACT

The acceleration of ions from ultrathin foils has been investigated by using 250 TW, subpicosecond laser pulses, focused to intensities of up to 3 × 10(20) W cm(-2). The ion spectra show the appearance of narrow-band features for protons and carbon ions peaked at higher energies (in the 5-10 MeV/nucleon range) and with significantly higher flux than previously reported. The spectral features and their scaling with laser and target parameters provide evidence of a multispecies scenario of radiation pressure acceleration in the light sail mode, as confirmed by analytical estimates and 2D particle-in-cell simulations. The scaling indicates that monoenergetic peaks with more than 100 MeV/nucleon are obtainable with moderate improvements of the target and laser characteristics, which are within reach of ongoing technical developments.


Subject(s)
Lasers , Models, Theoretical , Carbon/chemistry , Computer Simulation , Protons , Thermodynamics
17.
Phys Rev E ; 105(2-2): 025205, 2022 Feb.
Article in English | MEDLINE | ID: mdl-35291131

ABSTRACT

We study the photon emission by bremsstrahlung and nonlinear Compton scattering from interaction of ultra-intense laser pulses with cone target and flat foil using particle-in-cell simulations. The simulations are performed for laser pulses interacting with Al and Au targets. The strength of the two mechanisms of photon emission from bremsstrahlung and nonlinear Compton scattering are compared. When an ultra-intense (I>10^{22}W/cm^{2}) laser interacts with a cone and a foil target, photon emission by bremsstrahlung is found to be comparable to that from nonlinear Compton scattering. The obtained electron energy as well as the energy and number of photons emitted were found to be higher in case of cone shaped target compared with that of a foil target. The enhanced photon emission from cone shaped target is attributed to the guiding or collimation of hot electrons towards the cone tip from the self-generated magnetic field and electrostatic field along the cone surface which pushes the hot electrons towards the tip.

18.
Indian J Gastroenterol ; 41(5): 483-507, 2022 10.
Article in English | MEDLINE | ID: mdl-36214973

ABSTRACT

In the clinical setting, small intestinal bacterial overgrowth (SIBO) is a frequent, but under-diagnosed entity. SIBO is linked to various gastrointestinal (GI) and non-GI disorders with potentially significant morbidity. The optimal management of SIBO is undefined while there is a lack of published consensus guidelines. Against this background, under the auspices of the Indian Neurogastroenterology and Motility Association (INMA), formerly known as the Indian Motility and Functional Diseases Association (IMFDA), experts from the Asian-Pacific region with extensive research and clinical experience in the field of gut dysbiosis including SIBO developed this evidence-based practice guideline for the management of SIBO utilizing a modified Delphi process based upon 37 consensus statements, involving an electronic voting process as well as face-to-face meetings and review of relevant supporting literature. These statements include 6 statements on definition and epidemiology; 11 on etiopathogenesis and pathophysiology; 5 on clinical manifestations, differential diagnosis, and predictors; and 15 on investigations and treatment. When the proportion of those who voted either to accept completely or with minor reservations was 80% or higher, the statement was regarded as accepted. The members of the consensus team consider that this guideline would be valuable to inform clinical practice, teaching, and research on SIBO in the Asian-Pacific region as well as in other countries.


Subject(s)
Gastrointestinal Diseases , Irritable Bowel Syndrome , Humans , Intestine, Small/microbiology , Breath Tests , Gastrointestinal Diseases/diagnosis , Gastrointestinal Diseases/etiology , Gastrointestinal Diseases/therapy
19.
J Postgrad Med ; 57(2): 120-2, 2011.
Article in English | MEDLINE | ID: mdl-21654133

ABSTRACT

BACKGROUND: Indications for surgery in Hashimoto's thyroiditis (HT) patients are compressive symptoms and suspicion of malignancy. A high incidence of thyroid malignancy has been reported in patients with HT. The effect of surgery on discomfort in swallowing and tightness in the neck has not been properly evaluated. AIMS: The aim of our study is to compare the indications, complications, and associated cancers in patients operated for HT with those surgically treated for other benign goitres. The effect of surgery on minor symptoms like tightness in the neck and discomfort in swallowing is included. SETTING AND DESIGN: This was a retrospective case-control study at a tertiary care centre. PATIENTS AND METHODS: A total of 271 patients who had undergone surgery for benign thyroid diseases were included. Group A consisted of 35 patients who had HT and Group B consisted of patients operated for other benign thyroid diseases (236 patients). STATISTICAL ANALYSIS: Data were analyzed using SPSS 12 software. Independent group's t-test was used to compare the means and Fisher's exact test was used for categorical data. RESULTS: In Group A, the common indications for surgery were discomfort associated with swelling (45.7%), cosmesis (34.3%), and pain with swelling (11.4%) whereas in Group B, the indication was predominantly cosmetic (80%). A total of 22.9% patients of Group A and 6% of Group B were hyperthyroid. The sensitivity of FNAC for diagnosing thyroiditis was 62.8% (n = 22). Postoperative complication rates were similar in both the groups. The mean operating time was higher in Group A even though the gland was smaller. Incidental malignancy was 3.4% in Group B whereas there was none in Group A. Discomfort in swallowing and tightness in the neck were relieved at 3 months after surgery. CONCLUSIONS: Large, euthyroid and apparently asymptomatic HT occasionally need surgical intervention. Discomfort in swallowing and tightness in the neck are relieved after surgery. Thyroidectomy is safe to perform and has a low incidence of permanent complications. There was no associated malignancy in our series of HT.


Subject(s)
Hashimoto Disease/surgery , Thyroidectomy , Adult , Case-Control Studies , Female , Hashimoto Disease/complications , Humans , Male , Middle Aged , Postoperative Complications/epidemiology , Retrospective Studies , Thyroid Neoplasms/complications
20.
Indian J Pathol Microbiol ; 64(Supplement): S8-S31, 2021 Jun.
Article in English | MEDLINE | ID: mdl-34135135

ABSTRACT

The Indian Association of Pathologists and Microbiologists (IAPM) and Indian Society of Gastroenterology (ISG) decided to make a joint consensus recommendation for handling, processing, and interpretation of SI biopsies for the diagnosis and management of celiac disease (CD) recognizing the inhomogeneous practice of biopsy sampling, orientation, processing, and interpretation. A modified Delphi process was used to develop this consensus document containing a total of 42 statements and recommendations, which were generated by sharing the document draft, incorporating expert's opinion, followed by three cycles of electronic voting as well as a full-day face-to-face virtual ZOOM meeting and review of supporting literature. Of the 42 statements, 7 statements are on small intestinal (SI) biopsy in suspected patients of CD, site and the number of biopsies; 7 on handling, fixative, orientation, processing, and sectioning in pathology laboratories; 2 on histological orientation; 13 statements on histological interpretation and histological grading; 3 on the assessment of follow-up biopsies; 2 statements on gluten-free diet (GFD)-nonresponsive CD; 4 on challenges in the diagnosis of CD; 2 statements each on pathology reporting protocol and training and infrastructure in this area. The goal of this guideline document is to formulate a uniform protocol agreed upon both by the experienced pathologists and gastroenterologists to standardize the practice, improve the yield of small bowel biopsy interpretation, patients' compliance, overall management in CD, and generate unified data for patient care and research in the related field.


Subject(s)
Celiac Disease/diagnosis , Consensus , Intestine, Small/pathology , Pathologists/education , Pathologists/organization & administration , Pathology, Clinical/education , Biopsy , Female , Gastroenterology/education , Gastroenterology/methods , Gastroenterology/organization & administration , Humans , India , Male , Pathology, Clinical/methods
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