953 research outputs found
Non-commutative p-adic L-functions for supersingular primes
Let E/Q be an elliptic curve with good supersingular reduction at p with
a_p(E)=0. We give a conjecture on the existence of analytic plus and minus
p-adic L-functions of E over the Zp-cyclotomic extension of a finite Galois
extension of Q where p is unramified. Under some technical conditions, we adopt
the method of Bouganis and Venjakob for p-ordinary CM elliptic curves to
construct such functions for a particular non-abelian extension.Comment: 13 pages; some minor corrections; to appear in International Journal
of Number Theor
Congruence schemes
A new category of algebro-geometric objects is defined. This construction is
a vast generalization of existing F1-theories, as it contains the the theory of
monoid schemes on the one hand and classical algebraic theory, e.g.
Grothendieck schemes, on the the other. It also gives a handy description of
Berkovich subdomains and thus contains Berkovich's approach to abstract
skeletons. Further it complements the theory of monoid schemes in view of
number theoretic applications as congruence schemes encode number theoretical
information as opposed to combinatorial data which are seen by monoid schemes
Rapid Determination of Mg, Fe, Al, etc., in Rock Phosphate Samples using Atomic Absorption Spectrophotometer
There are several methods for the determination of Mg, Fe, Al and other elements in phosphorite samples. The method of analysis is developed in chemical laboratory of RODL, IBM, Bangalore for rock phosphate sample which is not only very fast and accurate but also maximum number of required elements can be analysed in the prepared solution. This method was used for the analysis of ore dressing products obtained while carrying out the beneficiation studies on rock phosphate samples from China.
The sample is treated with aquaregia followed by perchl-oric acid. The prepared solution is used for the determina-tion of maximum number of elements like Mg, Fe, Al etc., by Atomic Absorption Spectrophotometer. By taking suitable aliquot from the solution, P205 can be analysed by volu-metric or gravimetric method. Residue is used for the determination of Si02
Mineralogical and Electron Microprobe Studies on the Cobalt Sample from Kalyadi Copper Deposit, Hassan District, Karnataka
The copper-cobalt deposit from Kalyadi, Hassan district is located between Sigegudda and Nuggihalli greenstone belts of Karnataka Craton. The cobalt mineralisation is mostly in
banded, cherty and feldspathoid quartzite. The cobalt sample under investigation has been characterized by a variety of techniques including electron microprobe studies. The microprobe studies on sulphide grains were done to study the chemistry and elemental replacement in their lattice structure. The cobalt is present up to 3.21 wt% in pyrite grains whereas it is not present in chalco-pyrite and arsenopyrite. Cobalt has preferably replaced iron in pyrite, which is of volcanic - exhalative origin
Proton pump inhibitors and 180-day mortality in the elderly after Clostridium difficile treatment
Background: There is a reported association between proton pump inhibitor (PPI) exposure and increased risk of Clostridium difficile infection (CDI), but less is known about how this class of medications taken during treatment might influence mortality after CDI. Here we examine 180-day mortality rates in a cohort of CDI elders and its association with exposure to PPIs. We conducted a retrospective cohort study of elderly patients ( \u3e 65 years of age) diagnosed and treated for CDI in the years 2014-2016 (n = 874) in the Umass Memorial Health Care system, which represents both academic and community healthcare. Patient characteristics and medication use was extracted from the electronic medical record (EMR) and 6 month mortality data was obtained via the Center for Disease Control National Death Index. A Cox proportional hazards model was used to estimate hazard ratios associated with medication exposures and other relevant variables.
Results: Of the 874 elderly adults treated for CDI, 180-day all-cause mortality was 12.4%. Exposure to a PPI was associated with a 55% reduced risk of mortality (adjusted hazard ratio (aHR) 0.45; 95% confidence interval (CI) 0.28-0.72). In our Cox model, increasing age (aHR 1.45; 95% CI 1.14-1.84), those with severe CDI infections (aHR 1.87; 95% CI 1.22-2.88), and those with hospital acquired CDI (aHR 3.01; 95% CI 1.81-4.99) also had increased 180 day mortality risk. There were similar associations noted with both 90 day and 1-year mortality.
Conclusion: Use of PPIs during CDI treatment in elderly patients is associated with decreased 180-day mortality. Although use of PPIs has been associated with an increased risk of CDI, it appears to be protective against mortality when used during the treatment phase
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