24 research outputs found
Search for solar axions: CAST
The CERN Axion Solar Telescope (CAST) is searching for axions produced in the Sun's core by the Primakoff process. CAST is using a decommissioned Large Hadron Collider (LHC) test magnet where axions could be converted back into X-rays with energies up to 10 keV. Analysis of the 2003 data showed no signal above background implying an upper limit for the axion-photon coupling constant gagg < 1.16 X 10 ^-10 GeV exp -1 at 95% C.L. for ma . 0.02 eV [1]. The higher quality 2004 data is presently under analysis. CAST Phase II is scheduled to start in late 2005. This will be the first step in extending CAST's sensitivity to axion rest masses up to ~ 1 eV
Retrospective analysis of the role and performance of family medicine versus emergency medical services in the pre-hospital management of patients with AMI in Banja Luka
Detekcija periferne arterijske bolesti kod pacijenata sa tipom 2 dijabetes melitusa u ambulanti porodiÄne medicine
Uvod. Periferna arterijska bolest (PAB) je progresivna, okluzivna, aterosklerotskabolest krvnih sudova, a pacijenati sa dijabetes melitusom (DM) imajuznaÄajno veÄi rizik za razvoj ove bolesti. Cilj ove studije je bio da se utvrdiuÄestalost PAB kod pacijenata sa tipom 2 DM mjerenjem pedo-brahijalnog(PB) indeksa u ambulanti porodiÄne medicine.Metode. Studija presjeka je ukljuÄila pacijente sa tipom 2 DM registrovaneu ambulantama porodiÄne medicine Doma zdravlja LaktaÅ”i. MjerenjePB indeksa je vrÅ”eno na oscilometrijskom aparatu āBoso ABI Mess 100ā, aPAB je dijagnostikovana ako je vrijednost PB indeksa bila manja od 0,9 iliveÄa od 1,3.Rezultati. Ispitivanje je obuhvatilo 178 (90 muÅ”karaca) ispitanika sa tipom2 DM preko 50 godina starosti. PAB je registrovana kod 26 (14,6%) ispitanika,sa potvrÄenom znaÄajnom razlikom u PB indeksu (lijeva/desna noga)izmeÄu pacijenata sa PAB i pacijenata bez PAB (0,82/0,84 vs. 1,04/1,05; p< 0,01). ProsjeÄno trajanje DM bilo je duže kod bolesnika sa u odnosu naone bez PAB (12 vs. 8 godina; p = 0,097), a srednje vrijednosti HbA1c subile podjednake u obje grupe (7,7% vs. 7,9% ; p = 0,634). Nije potvrÄenarazlika u uÄestalosti hipertenzije, dislipidemije i gojaznosti izmeÄu bolesnikasa, odnosno bez PAB, ali je bilo znaÄajno viÅ”e puÅ”aÄa meÄu bolesnicimasa PAB (p<0,01).ZakljuÄak. Prevalencija PAB kod ispitanih pacijenata sa tipom 2 DM jeiznosila 14,6%. Dijabetes je trajao neznaÄajno duže kod pacijenata sa PABi meÄu njima je bilo znaÄajno viÅ”e puÅ”aÄa nego u grupi bez PAB. EdinburÅ”kiupitnik za klaudikacije je bio pozitivan kod samo treÄine pacijenata sa PAB.Mjerenjem PB indeksa se može rano dijagnostikovati PAB kod mnogo veÄegbroja pacijenata sa tipom 2 DM nego primjenom EdinburÅ”kog upitnika
Dietary amino acid and vitamin complex protects honey bee from immunosuppression caused by Nosema ceranae
Microsporidium Nosema ceranae is well known for exerting a negative impact on honey bee health, including down-regulation of immunoregulatory genes. Protein nutrition has been proven to have beneficial effects on bee immunity and other aspects of bee health. Bearing this in mind, the aim of our study was to evaluate the potential of a dietary amino acid and vitamin complex "BEEWELL AminoPlus" to protect honey bees from immunosuppression induced by N. ceranae. In a laboratory experiment bees were infected with N. ceranae and treated with supplement on first, third, sixth and ninth day after emergence. The expression of genes for immune-related peptides (abaecin, apidaecin, hymenoptaecin, defensin and vitellogenin) was compared between groups. The results revealed significantly lower (p lt 0.01 or p lt 0.001) numbers of Nosema spores in supplemented groups than in the control especially on day 12 post infection. With the exception of abacein, the expression levels of immune-related peptides were significantly suppressed (p lt 0.01 or p lt 0.001) in control group on the 12th day post infection, compared to bees that received the supplement. It was supposed that N. ceranae had a negative impact on bee immunity and that the tested amino acid and vitamin complex modified the expression of immune-related genes in honey bees compromised by infection, suggesting immune-stimulation that reflects in the increase in resistance to diseases and reduced bee mortality. The supplement exerted best efficacy when applied simultaneously with Nosema infection, which can help us to assume the most suitable period for its application in the hive
Weighing the Solar Axion
Axion helioscopes search for solar axions and axion-like particles via
inverse Primakoff conversion in strong laboratory magnets pointed at the Sun.
While helioscopes can always measure the axion coupling to photons, the
conversion signal is independent of the mass for axions lighter than around
0.02 eV. Masses above this value on the other hand have suppressed signals due
to axion-photon oscillations which destroy the coherence of the conversion
along the magnet. However, the spectral oscillations present in the axion
conversion signal between these two regimes are highly dependent on the axion
mass. We show that these oscillations are observable given realistic energy
resolutions and can be used to determine the axion mass to within percent level
accuracies. Using projections for the upcoming helioscope IAXO, we demonstrate
that sensitivity to a non-zero axion mass is possible between and eV for both the Primakoff and axion-electron
solar fluxes.Comment: 13 pages, 7 figures, matches published version, code available at
http://cajohare.github.io/IAXOmas