4,606 research outputs found
Atypical presentation of visceral leishmaniasis from non-endemic region
A case of atypical and acute presentation of visceral leishmaniasis from non-endemic region, characterised by exudative pleural effusion and hepatitis is reporte
Low temperature hopping magnetotransport in paramagnetic single crystals of cobalt doped ZnO
Long needle-shaped single crystals of Zn1-xCoxO were grown at low
temperatures using a molten salt solvent technique, up to x=0.10. The
conduction process at low temperatures is determined to be by Mott variable
range hopping. Both pristine and cobalt doped crystals clearly exhibit a
crossover from negative to positive magnetoresistance as the temperature is
decreased. The positive magnetoresistance of the Zn1-xCoxO single crystals
increases with increased Co concentration and reaches up to 20% at low
temperatures (2.5 K) and high fields (>1 T). SQUID magnetometry confirms that
the Zn1-xCoxO crystals are predominantly paramagnetic in nature and the
magnetic response is independent of Co concentration. The results indicate that
cobalt doping of single crystalline ZnO introduces localized electronic states
and isolated Co2+ ions into the host matrix, but that the magnetotransport and
magnetic properties are decoupled.Comment: 7 pages, 9 figures, submitted to Physical Review
X-raying the coronae of HD~155555
We present an analysis of the high-resolution Chandra observation of the
multiple system, HD 155555 (an RS CVn type binary system, HD 155555 AB, and its
spatially resolved low-mass companion HD 155555 C). This is an intriguing
system which shows properties of both an active pre-main sequence star and a
synchronised (main sequence) binary. We obtain the emission measure
distribution, temperature structures, plasma densities, and abundances of this
system and compare them with the coronal properties of other young/active
stars. HD 155555 AB and HD 155555 C produce copious X-ray emission with log Lx
of 30.54 and 29.30, respectively, in the 0.3-6.0 keV energy band. The light
curves of individual stars show variability on timescales of few minutes to
hours. We analyse the dispersed spectra and reconstruct the emission measure
distribution using spectral line analysis. The resulting elemental abundances
exhibit inverse first ionisation potential effect in both cases. An analysis of
He-like triplets yields a range of coronal electron densities ~10^10-10^13
cm-3. Since HD 155555 AB is classified both as an RS CVn and a PMS star, we
compare our results with those of other slightly older active main-sequence
stars and T Tauri stars, which indicates that the coronal properties of HD
155555 AB closely resemble that of an older RS CVn binary rather than a younger
PMS star. Our results also suggests that the properties of HD 155555 C is very
similar to those of other active M dwarfs.Comment: 17 pages, 23 figues, Accepted in Ap
Agricultural growth and structural changes in the Punjab economy: an input-output analysis
Agriculture Economic aspects India Punjab., Punjab (India) Economic conditions., Input-output analysis India Punjab.,
Characterisation of Bacillus thuringiensis kurstaki strains by toxicity, plasmid profiles and numerical analysis of their cryIA genes
In the present comparative study, four Bacillus thuringiensis kurstaki strains (HD1, dipel, HD73, HD1dipel) were characterized by investigating their total plasmid profiling; cryIA genes profiling andtoxicity towards local isolates of agricultural insects Helicoverpa armigera and Spodoptera litura. Result showed that LC50 for S. litura were 0.11 g of HD73, 0.027 g of HD1, 0.20 g of dipel and 0.018g of HD1 dipel, while LC50 for H. armigera insect were 0.04 g of HD73, 0.031 g of HD1, 0.011 g of dipel and 0.008 g of HD1dipel. The native plasmid number and type varied from 4 - 8 among these strains and HindIII restriction showed 0.4 to 8.0 kb size fragments. The numerical classification of the cryIA gene profiles showed two distinct clusters at 48% similarity level. Cluster one of 80% similarity comprises of two strains HD73 and dipel, while cluster two of 65% consisted of HD1 and HD1dipel strains. Southern analysis of restricted plasmid combined with cryIA profile can provide an effective approach for investigation of taxonomic relationship within Bacillus thuringiensis kurstaki strains
Transbasin water transfers
Presented at the 2001 USCID water management conference, Transbasin water transfers on June 27-30, 2001 in Denver, Colorado.Includes bibliographical references.To utilise the waters of the rivers Sutlej, Beas and Ravi flowing through Punjab, and which come to the exclusive share of India, as per the Indus Waters Treaty-1960 between the Governments of India and Pakistan, a number of projects have been planned, constructed or are under construction on these rivers. These projects have helped in gainfully diverting the waters of river Beas in Sutlej and of river Ravi to Beas, in addition to providing multi-purpose benefits. The projects have brought an agricultural and industrial revolution to the states of Punjab, Haryana and the desert areas of Rajasthan and transformed them into granaries of India. The paper briefly describes the various projects and their salient features. The impacts of the projects on the economy, environment, health, tourism and recreation etc. have been highlighted. Since these projects have enabled the diversion of surplus waters of one river to another, studies for integrated operation and management of waters of these rivers have been carried out for deriving optimum benefits. The paper also describes the real time integrated operation techniques, factors necessitating their adoption, and computer models used for integrated operation of the Bhakra Beas system of reservoirs. It is recommended that for effective utilization of the available waters, and implementation of the real time integrated operation techniques, an automatic data collection and transmission system be installed
What have we learned about primary liver transplantation under tacrolimus immunosuppression? - Long-term follow-up of the first 1000 patients
Objective: To summarize the long-term efficacy and safety of tacrolimus in orthotopic liver transplant (OLT) recipients, as well as to examine the factors that influence long-term morbidity and mortality rates. Background: Tacrolimus (FK506, Prograf) was introduced as primary immunosuppression for primary liver transplantation in 1989; many subsquent trials have verified the association of tacrolimus with decreased rates of acute rejection and steroid-resistant rejection after OLT. Cumulative experience with tacrolimus has also defined its short- and intermediate-term toxicity. Methods: One thousand consecutive patients undergoing primary OLT at a single center from August 1989 to December 1992, under tacrolimus immunosuppression, were followed until January 1999. Patients were categorized by age. Mean follow-up was 93.4 ± 11 months after OLT. Patient survival, graft survival (with corresponding causes of death and retransplantation), and rejection rates (and corresponding doses of immunosuppression) were examined as efficacy parameters. Hypertension, renal function, incidence of malignancies, incidence of diabetes, and other toxicities were examined as safety parameters. Results: Actual 6-year overall patient survival rate was 68.1% and graft survival rate was 62.5%, with significant differences in the patterns of survival among the different age groups. After the first post-OLT year, infection, recurrence of disease, de novo malignancies, and cardiovascular events were the main causes of graft loss and death during the long-term follow-up. Graft loss related to either acute or chronic rejection was rare. The rate of acute rejection beyond 2 years was approximately 3% per year, and most were steroid-responsive. Approximately 70% of the patients were receiving tacrolimus monotherapy beyond year 1; at the latest follow-up, 74.2% were maintained on tacrolimus alone. In 6.1% of the survivors, end- stage renal disease developed during the follow-up period, requiring either dialysis or kidney transplantation. Hyperkalemia and hypertension was observed in approximately one third of the patients. Insulin-dependent diabetes mellitus (including patients who had diabetes before the transplant) was observed in 14% in year 1, dropping to 11% in year 7. In 82 patients, de novo malignancies developed; in 41 patients, lymphoproliferative disorders developed during the entire follow-up period. Conclusions: Long-term patient and graft survival rates are excellent under tacrolimus immunosuppression. Pediatric patients have a better long-term outcome than adults, in part because of the limited recurrence of the original disease, which was the most common cause of late graft loss (other than patient death, most commonly the result of late de novo malignancies and cardiovascular events). Graft loss from late rejection was rare
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