152 research outputs found
Bertha M. Ryan (interviewed by Jennifer B. Krishnan)
No full textInterview conducted with an MIT alumna as part of the Margaret MacVicar Memorial AMITA (Association of MIT Alumnae) Oral History Project. The purpose of the project is to document the life histories of women graduates of the Massachusetts Institute of Technology
sj-docx-1-jic-10.1177_08850666231186947 - Supplemental material for Discordance Between Invasive and NonInvasive Oxygen Saturation in Critically Ill COVID-19 Patients
No full textSupplemental material, sj-docx-1-jic-10.1177_08850666231186947 for Discordance Between Invasive and NonInvasive Oxygen Saturation
in Critically Ill COVID-19 Patients by Thomas H. Fox, MD, William R. Mazalewski, DO, Hai S. Tran, MD, Travis Lindsey, MD, Amita Krishnan, MD, Stephen P. Kantrow, MD, Kyle I. Happel, MD, FCCP, David R. Janz, MD, Bennett P. deBoisblanc, MD, FACP, FCCP, FCCM, and Matthew R. Lammi, MD, MSCR in Journal of Intensive Care Medicine</p
Anaerobic benzene degradation in culture and hydrocarbon degradation in the subsurface environment
No full textUnderstanding of microorganisms and pathways involved in anaerobic benzene degradation is limited. Stable isotope probing of DNA was used to identify key members of a previously characterized, sulfate-reducing benzene degrading consortium. DNA extracts of cultures incubated with [13C6]- or [12C6]benzene were separated into 13C- and 12C-labeled fractions by CsCl density gradient centrifugation. Sequencing and Terminal Restriction Fragment Length Polymorphism (T-RFLP) analysis of the 16S rRNA gene identified TRF 270 (bp), a Desulfobacterium like phylotype, which was first to derive the bulk of the 13C label for DNA synthesis, and is thus likely involved in activation of benzene degradation.
To understand the pathway of anaerobic benzene metabolism, degradation and inhibition tests were used. Based on these tests toluene was eliminated, and benzoate was identified as a possible intermediate. Metabolites detected in cultures amended with [13C6]benzene or [13C6]phenol indicate that in this consortium there are 2 different pathways of benzoate formation, one forms universally labeled ([13C-UL]benzoate), and the other forms ring labeled benzoate. Pathway that forms [13C-UL]benzoate is dominant during benzene degradation in which the benzene ring is carboxylated by a carbon derived from another benzene ring. This pathway is different from the proposed pathway of benzene degradation via phenol, as the labeling pattern of 13C-labeled benzoate formed from [13C6]benzene or [13C6]phenol is not identical. In conclusion, a novel pathway that activates one benzene ring through its reaction with products of another benzene ring likely exists in this consortium.
Groundwater impacted by a manufacturing gas plant site was used for detection and quantification of metabolic intermediates of polycyclic aromatic hydrocarbons and gene analogues encoding alpha subunit of benzylsuccinate synthase (bssA), as evidence for natural attenuation. Highest concentrations of metabolic intermediates of anaerobic naphthalene and 2-methylnaphthalene degradation were detected in an impacted monitoring well (MW)-24, near the source. Quantitative analysis of 16S rRNA gene indicated that bacterial population was enriched in the impacted wells, while bssA gene containing bacterial community was enriched in MW-24. Detection of not one, but two different indicators specific to the presence and activity of microorganisms provides strong evidence for in situ anaerobic microbial processes.Ph.D.Includes bibliographical referencesby Amita R. Ok
Political governance and religious traditions
No full textBook review of Hinduism and Law (2010) Edited by Timothy Lubin, Donald R. Davis, Jr and Jayanth Krishnan. Cambridge University Press by Amita Dhanda Published in The Hindu 13/12/2011. Direct link to the article here. The continuance of the English common law in post-Independence India and the overbearing influence of Western legal philosophy on Indian legal education have invited critical comments. Both developments, it is argued, have prevented the evolution of a normative system that acco..
Amita Baviskar. Uncivil City: Ecology, Equity and the Commons in Delhi. 2020, Sage and Yodapress.
No full textAmita Baviskar’s latest book titled Uncivil City: Ecology,
Equity and the Commons in Delhi provides an in-depth analysis of
exclusion of the Commons from the socio-economic and political spaces of
inarguably India’s most powerful city; Delhi. The book is divided into
three sections with eights chapters encompassing book’s themes. It
starts with setting the context by explaining the reasons for titling
the book as ‘Uncivil City’. Conceptualising Delhi as Uncivil expounds
the City’s changing spatial dynamics which the author has detailed by
analysing City’s social history by doing socio-historical analysis. She
also reminisces her early-life experiences with the City; what the City
was for the Commons in the past; how infrastructural development has
excluded the Commons; what the City’s formal politics and politicised
environment is doing to the Commons and what does future entail for
them
Political governance and religious traditions
No full textBook review of Hinduism and Law (2010) Edited by Timothy Lubin, Donald R. Davis, Jr and Jayanth Krishnan. Cambridge University Press by Amita Dhanda Published in The Hindu 13/12/2011. Direct link to the article here. The continuance of the English common law in post-Independence India and the overbearing influence of Western legal philosophy on Indian legal education have invited critical comments. Both developments, it is argued, have prevented the evolution of a normative system that acco..
Chapter 10:Hydrogen production from ammonia cracking
No full texthis chapter discusses the basic concepts of hydrogen production from ammonia. Ammonia, which is a global commodity chemical, has an extraordinarily high storage capacity for hydrogen, that is, 17.65% by weight, and a hydrogen density of 115–120 kg hydrogen/m3 liquid ammonia. While ammonia production through the Haber process can be made green with the replacement of natural gas by water as a hydrogen source, it is at the point of usage of hydrogen, where the decomposition of ammonia, limited by higher temperatures, and subsequent purification of the hydrogen, with its associated capital costs, are the primary roadblocks to commercialization. These two steps lower the “round-trip” efficiency of hydrogen storage and transport and will need significant efforts to make it commercially viable.The authors review the diverse methodologies for hydrogen storage, critical for the scalability of hydrogen-based renewable energy systems, including high-pressure gaseous storage, cryogenic liquid hydrogen storage, cutting-edge solid-state hydride storage, and innovative liquid organic hydrogen carriers and ammonia. The second part of this chapter deals with the complexities of ammonia cracking/decomposition and the extensive R&D in the area of heterogeneous catalysis. The aim is to provide a realistic appraisal of the challenge
Partition asymptotics; zeros of zeta functions; and Apéry-like numbers
No full textPART I
G. H. Hardy and S. Ramanujan established an asymptotic formula for the number of
unrestricted partitions of a positive integer, and claimed a similar asymptotic formula for
the number of partitions into perfect kth powers, which was later proved by E. M. Wright.
Recently, R. C. Vaughan provided a simpler asymptotic formula in the case k = 2. In the
first part of the thesis, we study the number of partitions into parts from a specific set
Ak(a0; b0) :={mk : m 2 N;m _ a0 (mod b0)}, for fixed positive integers k, a0; and b0. Using
the Hardy-Littlewood circle method, we give an asymptotic formula for the number of such partitions, thus generalizing the aforementioned results of Wright and Vaughan. We also consider the parity problem for such partitions and prove that the number of such partitions is even (odd) infinitely often, which generalizes O. Kolberg's theorem for the ordinary partition function. This material builds on the joint work with B. C. Berndt and A. Zaharescu.
PART II
The Riemann Hypothesis implies that the zeros of all the derivatives of the Riemann-_
function lie on the critical line. Results on the proportion of zeros on the critical line of derivatives of _(s) have been investigated before by B. Conrey, and I. Rezvyakova. The percentage of zeros of _(k)(s) on the critical line approaches 100% percent as k increases. The second part of this thesis builds on the joint work with S. Chaubey, N. Robles, and A. Zaharescu. We study the zeros of combinations of derivatives of _(s). Although such combinations do not always have all their zeros on the critical line, we show that the proportion of zeros on the critical line still tends to 1.
PART III
The third part of this thesis focuses on the work on Apéry-like numbers joint with Armin
Straub. In 1982, Gessel showed that the Apéry numbers associated to the irrationality of
_(3) satisfy Lucas congruences. Our main result is to prove corresponding congruences for all known sporadic Apéry-like sequences. In several cases, we are able to employ approaches due to McIntosh, Samol-van Straten and Rowland-Yassawi to establish these congruences. However, for the sequences labeled s18 and (_) we require a finer analysis. As an application, we investigate modulo which numbers these sequences are periodic. In particular, we show that the Almkvist-Zudilin numbers are periodic modulo 8, a special property which they share with the Apéry numbers. We also investigate primes which do not divide any term of a given Apéry -like sequence.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2019-08-01The student, Amita Malik, accepted the attached license on 2017-07-13 at 10:11.The student, Amita Malik, submitted this Dissertation for approval on 2017-07-13 at 10:40.This Dissertation was approved for publication on 2017-07-13 at 13:58.DSpace SAF Submission Ingestion Package generated from Vireo submission #11450 on 2017-09-29 at 11:19:20Made available in DSpace on 2017-09-29T17:52:21Z (GMT). No. of bitstreams: 2
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Irrigation, gender and poverty: overview of issues and options
No full textIrrigated farmingLaborPovertyFarming systemsWomenFarmersIncomeHouseholdsGender
Talc-Induced Acute Renal Failure After Talc Pleurodesis
No full textAmerican Thoracic Society International Conference, ATS 2023, May 19 - 24, 2023, Washington D
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