122 research outputs found
cutaneous mycobacterium chelonae infection in a presumably immunocompetent host
8. Parslew R, Lewis-Jones MS. Localized unilateral hyper13. Mayou SC, Black MM, Russell Jones R. Sudoriferous hamartoma. Clin Exp Dermatol 1988; 13: 107β108. hidrosis secondary to an eccrine naevus. Clin Exp 14. Pippione M, Depaoli MA, Sartoris S. Naevus eccrine. Dermatol 1997; 22: 246β247. Dermatologica 1976; 152: 40β46. 9. Martius I. Lokalisierte ekkrine schweibdrusennavus mit 15. Hong CE, Lee SH. Multiple eccrine nevus with depressed hyperfunktion. Dermatol Wochenschr 1954; 130: 1016. patches. Yosei Med J 1997; 38: 60β62. 10. Chan P, Kao GF, Pierson DL, Rodman OG. Episodic 16. Kopera D, Soyer HP, Kerl H. Human eccrine hamartoma hyperhidrosis on the dorsum of hands. J Am Acad of forearm-antebrachial organ of the ringtailed Lemur Dermatol 1985; 12: 937β942. ( lemur catta). A posssible phylogenetic relationship? Am 11. Bingel G, Ertle T. Naevus sudoriferus. Z Hautch 1985; J Dermatopathol 1994; 16: 275β279. 60: 372. 17. Nightingale KJ, Newman P, Davies MG. A function12. Van de Kerkhof PJCM, Den Arend JAJC, Bousema MT, ing hamartoma associated with Down's syndrome Strolz E. Localized unilateral hyperhidrosis. Br J Dermatol (46,xx,β21,+ t(21q21q). Clin Exp Dermatol 1998; 23: 264β266. 1987; 177: 779β782
Numerical study of the spherically-symmetric Gross-Pitaevskii equation in two space dimensions
We present a numerical study of the time-dependent and time-independent
Gross-Pitaevskii (GP) equation in two space dimensions, which describes the
Bose-Einstein condensate of trapped bosons at ultralow temperature with both
attractive and repulsive interatomic interactions. Both time-dependent and
time-independent GP equations are used to study the stationary problems. In
addition the time-dependent approach is used to study some evolution problems
of the condensate. Specifically, we study the evolution problem where the trap
energy is suddenly changed in a stable preformed condensate. In this case the
system oscillates with increasing amplitude and does not remain limited between
two stable configurations. Good convergence is obtained in all cases studied.Comment: 9 latex pages, 7 postscript figures, To appear in Phys. Rev.
Superfluid and Dissipative Dynamics of a Bose-Einstein Condensate in a Periodic Optical Potential
We create Bose-Einstein condensates of 87-rubidium in a static magnetic trap
with a superimposed blue-detuned 1D optical lattice. By displacing the magnetic
trap center we are able to control the condensate evolution. We observe a
change in the frequency of the center-of-mass oscillation in the harmonic
trapping potential, in analogy with an increase in effective mass. For fluid
velocities greater than a local speed of sound, we observe the onset of
dissipative processes up to full removal of the superfluid component. A
parallel simulation study visualizes the dynamics of the BEC and accounts for
the main features of the observed behavior.Comment: 4 pages, including figure
Mean-field description of collapsing and exploding Bose-Einstein condensates
We perform numerical simulation based on the time-dependent mean-field
Gross-Pitaevskii equation to understand some aspects of a recent experiment by
Donley et al. on the dynamics of collapsing and exploding Bose-Einstein
condensates of Rb atoms. They manipulated the atomic interaction by an
external magnetic field via a Feshbach resonance, thus changing the repulsive
condensate into an attractive one and vice versa. In the actual experiment they
changed suddenly the scattering length of atomic interaction from positive to a
large negative value on a pre-formed condensate in an axially symmetric trap.
Consequently, the condensate collapses and ejects atoms via explosion. We find
that the present mean-field analysis can explain some aspects of the dynamics
of the collapsing and exploding Bose-Einstein condensates.Comment: 9 Latex pages, 10 ps and eps files, version accepted in Physical
Review A, minor changes mad
Numerical study of the coupled time-dependent Gross-Pitaevskii equation: Application to Bose-Einstein condensation
We present a numerical study of the coupled time-dependent Gross-Pitaevskii
equation, which describes the Bose-Einstein condensate of several types of
trapped bosons at ultralow temperature with both attractive and repulsive
interatomic interactions. The same approach is used to study both stationary
and time-evolution problems. We consider up to four types of atoms in the study
of stationary problems. We consider the time-evolution problems where the
frequencies of the traps or the atomic scattering lengths are suddenly changed
in a stable preformed condensate. We also study the effect of periodically
varying these frequencies or scattering lengths on a preformed condensate.
These changes introduce oscillations in the condensate which are studied in
detail. Good convergence is obtained in all cases studied.Comment: 9 pages, 10 figures, accepted in Physical Review
Differential Effects of Bartonella henselae on Human and Feline Macro- and Micro-Vascular Endothelial Cells
Bartonella henselae, a zoonotic agent, induces tumors of endothelial cells (ECs), namely bacillary angiomatosis and peliosis in immunosuppressed humans but not in cats. In vitro studies on ECs represent to date the only way to explore the interactions between Bartonella henselae and vascular endothelium. However, no comparative study of the interactions between Bartonella henselae and human (incidental host) ECs vs feline (reservoir host) ECs has been carried out because of the absence of any available feline endothelial cell lines
Commentary: mechanistic considerations for associations between formaldehyde exposure and nasopharyngeal carcinoma
Occupational exposure to formaldehyde has been linked to nasopharyngeal carcinoma. To date, mechanistic explanations for this association have primarily focused on formaldehyde-induced cytotoxicity, regenerative hyperplasia and DNA damage. However, recent studies broaden the potential mechanisms as it is now well established that formaldehyde dehydrogenase, identical to S-nitrosoglutathione reductase, is an important mediator of cGMP-independent nitric oxide signaling pathways. We have previously described mechanisms by which formaldehyde can influence nitrosothiol homeostasis thereby leading to changes in pulmonary physiology. Considering evidences that nitrosothiols govern the Epstein-Barr virus infection cycle, and that the virus is strongly implicated in the etiology of nasopharyngeal carcinoma, studies are needed to examine the potential for formaldehyde to reactivate the Epstein-Barr virus as well as additively or synergistically interact with the virus to potentiate epithelial cell transformation
Acute rhabdomyolysis and delayed pericardial effusion in an Italian patient with Ebola virus disease : a case report
Background: During the 2013-2016 West Africa Ebola virus disease (EVD) epidemic, some EVD patients, mostly health care workers, were evacuated to Europe and the USA. Case presentation: In May 2015, a 37-year old male nurse contracted Ebola virus disease in Sierra Leone. After Ebola virus detection in plasma, he was medically-evacuated to Italy. At admission, rhabdomyolysis was clinically and laboratory-diagnosed and was treated with aggressive hydration, oral favipiravir and intravenous investigational monoclonal antibodies against Ebola virus. The recovery clinical phase was complicated by a febrile thrombocytopenic syndrome with pericardial effusion treated with corticosteroids for 10days and indomethacin for 2months. No evidence of recurrence is reported. Conclusions: A febrile thrombocytopenic syndrome with pericardial effusion during the recovery phase of EVD appears to be uncommon. Clinical improvement with corticosteroid treatment suggests that an immune-mediated mechanism contributed to the pericardial effusion
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