Showing papers by "University of Zagreb published in 2005"
TL;DR: In this paper, the most important experimental results from the first three years of nucleus-nucleus collision studies at RHIC were reviewed, with emphasis on results of the STAR experiment.
2,750 citations
Duke University1, University of Barcelona2, Drexel University3, Tel Aviv University4, Alfred Hospital5, University of Michigan6, University of Zagreb7, Medical University of South Carolina8, Federal University of Rio de Janeiro9, Autonomous University of Barcelona10, Geelong Hospital11, University of Amsterdam12, Wayne State University13, University of California, Los Angeles14
TL;DR: Characteristics of patients with S aureus IE vary significantly by region, and further studies are required to determine the causes of regional variation.
Abstract: ContextThe global significance of infective endocarditis (IE) caused by Staphylococcus aureus is unknown.ObjectivesTo document the international emergence of health care–associated S aureus IE and methicillin-resistant S aureus (MRSA) IE and to evaluate regional variation in patients with S aureus IE.Design, Setting, and ParticipantsProspective observational cohort study set in 39 medical centers in
16 countries. Participants were a population of 1779 patients with definite
IE as defined by Duke criteria who were enrolled in the International Collaboration
on Endocarditis-Prospective Cohort Study from June 2000 to December 2003.Main Outcome MeasureIn-hospital mortality.ResultsS aureus was the most common pathogen among
the 1779 cases of definite IE in the International Collaboration on Endocarditis
Prospective-Cohort Study (558 patients, 31.4%). Health care−associated
infection was the most common form of S aureus IE
(218 patients, 39.1%), accounting for 25.9% (Australia/New Zealand) to 54.2%
(Brazil) of cases. Most patients with health care−associated S aureus IE (131 patients, 60.1%) acquired the infection outside of
the hospital. MRSA IE was more common in the United States (37.2%) and Brazil
(37.5%) than in Europe/Middle East (23.7%) and Australia/New Zealand (15.5%, P<.001). Persistent bacteremia was independently associated
with MRSA IE (odds ratio, 6.2; 95% confidence interval, 2.9-13.2). Patients
in the United States were most likely to be hemodialysis dependent, to have
diabetes, to have a presumed intravascular device source, to receive vancomycin,
to be infected with MRSA, and to have persistent bacteremia (P<.001 for all comparisons).ConclusionsS aureus is the leading cause of IE in many
regions of the world. Characteristics of patients with S aureus IE vary significantly by region. Further studies are required
to determine the causes of regional variation.
1,101 citations
TL;DR: A review of recent applications of self-consistent relativistic mean field models to exotic nuclear structure can be found in this article, where the authors provide a rich theoretical framework for studies of nuclei along the valley of β-stability, exotic nuclei with extreme groundstate isospin values and close to the particle drip lines.
782 citations
Kevork N. Abazajian1, Jennifer K. Adelman-McCarthy2, Marcel A. Agüeros3, S. Allam2 +164 more•Institutions (47)
TL;DR: The Third Data Release of the Sloan Digital Sky Survey (SDSS) as mentioned in this paper contains data taken up through 2003 June, including imaging data in five bands over 5282 deg2, photometric and astrometric catalogs of the 141 million objects detected in these imaging data, and spectra of 528,640 objects selected over 4188 deg2.
Abstract: This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg2, photometric and astrometric catalogs of the 141 million objects detected in these imaging data, and spectra of 528,640 objects selected over 4188 deg2. The pipelines analyzing both images and spectroscopy are unchanged from those used in our Second Data Release.
734 citations
TL;DR: In this paper, a new improved relativistic mean-field effective interaction with explicit density dependence of the meson-nucleon couplings was proposed. But it was only applied to the analysis of very recent data on superheavy nuclei.
Abstract: We adjust a new improved relativistic mean-field effective interaction with explicit density dependence of the meson-nucleon couplings. The effective interaction DD-ME2 is tested in relativistic Hartree-Bogoliubov and quasiparticle random-phase approximation (QRPA) calculations of nuclear ground states and properties of excited states, in calculation of masses, and it is applied to the analysis of very recent data on superheavy nuclei.
526 citations
TL;DR: The Adriatic Carbonate Platform (AdCP) is one of the largest Mesozoic carbonate platforms of the Perimediterranean region as mentioned in this paper, which is defined as an isolated palaeogeographical entity.
470 citations
TL;DR: The results from the STAR Collaboration on directed flow (v(1), elliptic flow, and the fourth harmonic in the anisotropic azimuthal distribution of particles from Au+Au collisions at root s(NN) = 200 GeV are summarized and compared with results from other experiments and theoretical models.
Abstract: The results from the STAR Collaboration on directed flow (v(1)), elliptic flow (v(2)), and the fourth harmonic (v(4)) in the anisotropic azimuthal distribution of particles from Au+Au collisions at root s(NN) = 200 GeV are summarized and compared with results from other experiments and theoretical models. Results for identified particles are presented and fit with a blast-wave model. Different anisotropic flow analysis methods are compared and nonflow effects are extracted from the data. For v(2), scaling with the number of constituent quarks and parton coalescence are discussed. For v(4), scaling with v(2)(2) and quark coalescence are discussed.
448 citations
TL;DR: In this article, the authors reconstructed hadrons in 0.15 4 4 GeV/c collisions with pp and Au+Au at the radical (s{sub NN}) = 200 GeV and the associated multiplicity and p{sub perpendicular} magnitude sum were found to increase from pp to central Au+AU collisions.
Abstract: Charged hadrons in 0.15 4 GeV/c are reconstructed in pp and Au+Au collisions at {radical}(s{sub NN})=200 GeV. The associated multiplicity and p{sub perpendicular} magnitude sum are found to increase from pp to central Au+Au collisions. The associated p{sub perpendicular} distributions, while similar in shape on the nearside, are significantly softened on the awayside in central Au+Au relative to pp and not much harder than that of inclusive hadrons. The results, consistent with jet quenching, suggest that the awayside fragments approach equilibration with the medium traversed.
403 citations
TL;DR: A new biometric approach to personal identification using eigenfinger and eigenpalm features, with fusion applied at the matching-score level is described, with effectiveness shown in terms of recognition rate, equal error rate, and total error rate.
Abstract: This paper presents a multimodal biometric identification system based on the features of the human hand. We describe a new biometric approach to personal identification using eigenfinger and eigenpalm features, with fusion applied at the matching-score level. The identification process can be divided into the following phases: capturing the image; preprocessing; extracting and normalizing the palm and strip-like finger subimages; extracting the eigenpalm and eigenfinger features based on the K-L transform; matching and fusion; and, finally, a decision based on the (k, l)-NN classifier and thresholding. The system was tested on a database of 237 people (1,820 hand images). The experimental results showed the effectiveness of the system in terms of the recognition rate (100 percent), the equal error rate (EER = 0.58 percent), and the total error rate (TER = 0.72 percent).
362 citations
TL;DR: In this paper, a review of literature on employment and other socioeconomic aspects of bioenergy systems as drivers for implementing bioenergy projects is presented, and the authors aim to trigger a more in-depth discussion of data gaps, potentials, opportunities and challenges.
Abstract: Within the international community there is considerable interest in the socio-economic implications of moving society towards the more widespread use of renewable energy resources. Such change is seen to be very necessary but is often poorly communicated to people and communities who need to accept such changes. There are pockets of activity across the world looking at various approaches to understand this fundamental matter. Typically, socio-economic implications are measured in terms of economic indices, such as employment and monetary gains, but in effect the analysis relates to a number of aspects which include social, cultural, institutional, and environmental issues. The extremely complex nature of bioenergy, many different technologies involved and a number of different, associated aspects (socio-economics, greenhouse gas mitigation potential, environment, …) make this whole topic a complex subject. This paper is primarily a descriptive research and review of literature on employment and other socio-economic aspects of bioenergy systems as drivers for implementing bioenergy projects. Due to the limited information, this paper does not provide absolute quantification on the multiplier effects of local and or national incomes of any particular country or region. The paper intends to trigger a more in-depth discussion of data gaps, potentials, opportunities and challenges. An encouraging trend is that in many countries policy makers are beginning to perceive the potential economic benefits of commercial biomass e.g. employment/earnings, regional economic gain, contribution to security of energy supply and all others.
340 citations
Illumina1, Food and Drug Administration2, University of Washington3, University of Cambridge4, Applied Biosystems5, Imperial College London6, Stanford University7, Merck & Co.8, Invitrogen9, Thermo Fisher Scientific10, Eli Lilly and Company11, ATCC12, Johns Hopkins University13, National Institutes of Health14, GE Healthcare15, Hoffmann-La Roche16, Agilent Technologies17, Lawrence Livermore National Laboratory18, Genentech19, National Institute of Standards and Technology20, University of California, Los Angeles21, University of Zagreb22
TL;DR: The External RNA Controls Consortium (ERCC) is developing commonly agreed-upon and tested controls for use in expression assays, a true industry-wide standard control.
Abstract: Standard controls and best practice guidelines advance acceptance of data from research, preclinical and clinical laboratories by providing a means for evaluating data quality. The External RNA Controls Consortium (ERCC) is developing commonly agreed-upon and tested controls for use in expression assays, a true industry-wide standard control.
TL;DR: The aim of this paper is to present an independent, comparative study of three most popular appearance‐based face recognition projection methods in completely equal working conditions regarding preprocessing and algorithm implementation.
Abstract: Face recognition is one of the most successful applica- tions of image analysis and understanding and has gained much attention in recent years. Various algorithms were proposed and research groups across the world reported different and often contra- dictory results when comparing them. The aim of this paper is to present an independent, comparative study of three most popular appearance-based face recognition projection methods (PCA, ICA, and LDA) in completely equal working conditions regarding prepro- cessing and algorithm implementation. We are motivated by the lack of direct and detailed independent comparisons of all possible algo- rithm implementations (e.g., all projection-metric combinations) in available literature. For consistency with other studies, FERET data set is used with its standard tests (gallery and probe sets). Our results show that no particular projection-metric combination is the best across all standard FERET tests and the choice of appropriate projec- tion-metric combination can only be made for a specific task. Our results are compared to other available studies and some discrepan- cies are pointed out. As an additional contribution, we also introduce our new idea of hypothesis testing across all ranks when comparing
TL;DR: In this article, a rectangular waveguide filled with anisotropic uniaxial metamaterial with transversal negative effective permeability was investigated both theoretically and experimentally, and it was shown that such a waveguide supports propagation of the backward wave below the cutoff frequency, thus it can be considered as a dual of the ordinary waveguide.
Abstract: A rectangular waveguide filled with anisotropic uniaxial metamaterial with transversal negative effective permeability is investigated both theoretically and experimentally. It is shown that such a waveguide supports propagation of the backward wave below the cutoff frequency, thus, it can be considered as a dual of the ordinary waveguide. The transversal dimension of this waveguide can be arbitrarily smaller than half of a wavelength in the filling material, provided that the transversal permeability is negative. This peculiar behavior may be used for fabrication of miniaturized rectangular waveguides. Several experimental miniaturized waveguides loaded with double ring resonators in 7 GHz frequency band have been designed, fabricated and tested. The measured results revealed backward-wave passband located below the cutoff frequency. Furthermore, it was experimentally shown that the increase of the physical length of the waveguide caused the decrease of the electrical length. This is a direct proof of the backward-wave propagation since the phase of the backward wave increases along the waveguide.
TL;DR: The results show that by measuring electric conductivity during the pulses the authors can detect limit permeabilization threshold but not directly permeabilized level, whereas impedance measurements in seconds after the pulse application are not suitable.
TL;DR: In this paper, the authors collected a face-to-face survey with 179 consumers in the capital of Croatia to gain knowledge about consumer attitudes toward organic products in the country and found that Croatian consumers consider organically-grown products as very healthy, of good quality and tasty.
Abstract: Purpose of this paper – The market for organic products in Croatia is at the beginning of its development. There is no sufficient knowledge about organic consumers in Croatia. The objective of this paper is to gain knowledge about consumer attitudes toward organic products in the capital of Croatia.Design/methodology/approach – The consumers’ attitudes were collected by means of a face‐to‐face survey. Attitudes, purchase frequency, supply satisfaction and beliefs about organic foods were studied with a sample of 179 consumers. The data obtained from the survey were analysed with univariate analysis, chi‐square test, ANOVA and correlation analysis.Findings – Croatian consumers consider organically‐grown products as very healthy, of good quality and tasty. However, these products are perceived as rather expensive and of questionable appearance. Consumers are not very familiar with the supply of ecologically‐grown products in the market. Some groups of consumers have more positive attitudes toward organic pr...
TL;DR: In this article, the size of the majority of ZnO particles varied between 20 and 50 nm, thus indicating that particle and crystallite sizes in zinc oxide powders were approximately equal.
TL;DR: In this paper, the authors present a systematic analysis of two-pion interferometry in Au+Au collisions at {radical}(s{sub NN})=200 GeV using the STAR detector at Relativistic Heavy Ion Collider.
Abstract: We present a systematic analysis of two-pion interferometry in Au+Au collisions at {radical}(s{sub NN})=200 GeV using the STAR detector at Relativistic Heavy Ion Collider. We extract the Hanbury-Brown and Twiss radii and study their multiplicity, transverse momentum, and azimuthal angle dependence. The Gaussianness of the correlation function is studied. Estimates of the geometrical and dynamical structure of the freeze-out source are extracted by fits with blast-wave parametrizations. The expansion of the source and its relation with the initial energy density distribution is studied.
University of Erlangen-Nuremberg1, University of Greifswald2, RWTH Aachen University3, University of Münster4, University of Costa Rica5, Radboud University Nijmegen Medical Centre6, The Catholic University of America7, University of Zagreb8, State University of Campinas9, Boston Children's Hospital10, Emek Medical Center11, University of Pittsburgh12, California Institute of Technology13
TL;DR: Findings indicate that deficiency of UBR1 perturbs the pancreas' acinar cells and other organs, presumably owing to metabolic stabilization of specific substrates of the N-end rule pathway.
Abstract: Johanson-Blizzard syndrome (OMIM 243800) is an autosomal recessive disorder that includes congenital exocrine pancreatic insufficiency, multiple malformations such as nasal wing aplasia, and frequent mental retardation. We mapped the disease-associated locus to chromosome 15q14-21.1 and identified mutations, mostly truncating ones, in the gene UBR1 in 12 unrelated families with Johanson-Blizzard syndrome. UBR1 encodes one of at least four functionally overlapping E3 ubiquitin ligases of the N-end rule pathway, a conserved proteolytic system whose substrates include proteins with destabilizing N-terminal residues. Pancreas of individuals with Johanson-Blizzard syndrome did not express UBR1 and had intrauterine-onset destructive pancreatitis. In addition, we found that Ubr1(-/-) mice, whose previously reported phenotypes include reduced weight and behavioral abnormalities, had an exocrine pancreatic insufficiency, with impaired stimulus-secretion coupling and increased susceptibility to pancreatic injury. Our findings indicate that deficiency of UBR1 perturbs the pancreas' acinar cells and other organs, presumably owing to metabolic stabilization of specific substrates of the N-end rule pathway.
TL;DR: Student progress in the blended WBL-PBL-collaborative learning environment was positively affected by the use of technology.
Abstract: World Wide Web (Web)-based learning (WBL), problem-based learning (PBL), and collaborative learning are at present the most powerful educational options in higher education. A blended (hybrid) cour...
TL;DR: In this paper, modified hydrothermal and "wet" precipitation routes at room temperature were employed to synthesize pure monoclinic BiVO 4 powders of varying particle morphologies.
TL;DR: In this article, the removal of arsenic and pesticides from natural ground water from the Slavonia region, Croatia, by two commercial nanofiltration membranes (NF270 and NFc) was investigated.
TL;DR: In this paper, the authors evaluated the safety and efficacy of fontolizumab, a humanised anti-interferon γ antibody, in patients with moderate to severe Crohn's disease.
Abstract: Introduction: Interferon γ is a potent proinflammatory cytokine implicated in the inflammation of Crohn’s disease (CD). We evaluated the safety and efficacy of fontolizumab, a humanised anti-interferon γ antibody, in patients with moderate to severe CD. Methods: A total of 133 patients with Crohn’s disease activity index (CDAI) scores between 250 and 450, inclusive, were randomised to receive placebo or fontolizumab 4 or 10 mg/kg. Forty two patients received one dose and 91 patients received two doses on days 0 and 28. Investigators and patients were unaware of assignment. Study end points were safety, clinical response (decrease in CDAI of 100 points or more), and remission (CDAI ⩽150). Results: There was no statistically significant difference in the primary end point of the study (clinical response) between the fontolizumab and placebo groups after a single dose at day 28. However, patients receiving two doses of fontolizumab demonstrated doubling in response rate at day 56 compared with placebo: 32% (9/28) versus 69% (22/32, p = 0.02) and 67% (21/31, p = 0.03) for the placebo, and 4 and 10 mg/kg fontolizumab groups, respectively. Stratification according to elevated baseline C reactive protein levels resulted in a decreased placebo response and pronounced differences in clinical benefit. Two grade 3 adverse events were reported and were considered to be related to CD. One death (during sleep) and one serious adverse event (an elective hospitalisation) occurred, both considered unrelated. Conclusion: Treating active CD with fontolizumab was well tolerated and resulted in increased rates of clinical response and remission compared with placebo.
TL;DR: In this article, the midrapidity open charm spectra from direct reconstruction of D0(D0) and indirect electron-positron measurements via charm semileptonic decays in p+p and d+Au collisions at square root[sNN]=200 GeV are reported.
Abstract: Midrapidity open charm spectra from direct reconstruction of D0(D0)-->K-/+pi+/- in d+Au collisions and indirect electron-positron measurements via charm semileptonic decays in p+p and d+Au collisions at squareroot[sNN]=200 GeV are reported. The D0(D0) spectrum covers a transverse momentum (pT) range of 0.1
TL;DR: The applicability of the mixed bacterial culture, originated from two-stage anaerobic-aerobic industrial yeasts production wastewater treatment plant for high rate denitrification processes was investigated, obeying a zero- order reaction with respect to nitrate and a first-order reaction withrespect to biomass concentration.
TL;DR: The authors concluded that the assimilation model is the best explanation for the origin of anatomically modern humans in Europe, if Neandertals are assimilated into in-migrating populations of modern people in Europe.
TL;DR: To investigate the functional role of surface layer proteins (S‐layer) in probiotic strain Lactobacillus acidophilus M92, especially its influence on adhesiveness to mouse ileal epithelial cells.
Abstract: J. FRECE, B. KOS, I.K. SVETEC, Z. ZGAGA, V. MRSAA ND J. SUSKOVIC´ . 2004. Aims: To investigate the functional role of surface layer proteins (S-layer) in probiotic strain Lactobacillus acidophilus M92, especially its influence on adhesiveness to mouse ileal epithelial cells. Methods and Results: Sodium dodecyl sulphate polyacrylamide gel electrophoresis of cell surface proteins revealed the presence of potential surface layer (S-layer) proteins, ca at 45 kDa in L. acidophilus M92. Southern blot with pBK1 plasmid, containing slpA gene, gave a positive signal, suggesting that L. acidophilus M92 has a slpA gene coding for the S-layer proteins. S-layer proteins of this strain are present during all phases of growth. The S-layer proteins appeared when cells treated with 5 mol l )1 LiCl were allowed to grow again. Removal of the S-layer proteins reduced adhesion of L. acidophilus M92 to mouse ileal epithelial cells. Furthermore, the viability of cells without S-layer were reduced in simulated gastric juice at low pH range (2, 2AE5, 3) and simulated pancreatic juice with bile salts (1AE 5a nd 3gl )1 ). S-layer proteins of L. acidophilus M92 were resistant to pepsin and pancreatin, in contrast, the treatment with proteinase K led to a significant proteolysis of the S-layer proteins. Conclusions: These results demonstrated functional role of S-layer; it is responsible for adhesiveness of Lactobacillus acidophilus M92 to mouse ileal epithelial cells and has a protective role for this strain. Significance and Impact of the Study: S-layer proteins have an important role in the establishment of probiotic strain Lactobacillus acidophilus M92 in the gastrointestinal tract.
Journal Article•
TL;DR: Antifungal activities of fluid extract and essential oil obtained from anise fruits Pimpinella anisum L. (Apiaceae) were tested in vitro on clinical isolates of seven species of yeasts and four species of dermatophytes.
Abstract: Antifungal activities of fluid extract and essential oil obtained from anise fruits Pimpinella anisum L. (Apiaceae) were tested in vitro on clinical isolates of seven species of yeasts and four species of dermatophytes. Diffusion method with cylinders and the broth dilution method were used for antifungal activity testing. Anise fluid extract showed antimycotic activity against Candida albicans, C. parapsilosis, C. tropicalis, C. pseudotropicalis and C. krusei with MIC values between 17 and 20% (V/V). No activity was noticed against C. glabrata, and anis fruits extracts showed growth promotion activity on Geotrichum spp. Anise fruits extract inhibited the growth of dermatophyte species (Trichophyton rubrum, T. mentagrophytes, Microsporum canis and M. gypseum) with MIC values between 1.5 and 9% (V/V). Anise essential oil showed strong antifungal activity against yeasts with MIC lower than 1.56% (V/V) and dermatophytes with MIC lower than 0.78% (V/V). Significant differences in antifungal activities were found between anise fluid extract and anise essential oil (p < 0.01). Anise essential oil exhibited stronger antifungal activities against yeasts and dermatophytes with MIC values between 0.10 and 1.56% (V/V), respectively.
TL;DR: In this article, the relativistic heavy ion collisions at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory were investigated using the short-lived K(892) resonance channel.
Abstract: The short-lived K(892)* resonance provides an efficient tool to probe properties of the hot and dense medium produced in relativistic heavy-ion collisions. We report measurements of K* in {radical}(s{sub NN})=200 GeV Au+Au and p+p collisions reconstructed via its hadronic decay channels K(892)*{sup 0}{yields}K{pi} and K(892)*{sup {+-}}{yields}K{sub S}{sup 0}{pi}{sup {+-}} using the STAR detector at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. The K*{sup 0} mass has been studied as a function of p{sub T} in minimum bias p+p and central Au+Au collisions. The K* p{sub T} spectra for minimum bias p+p interactions and for Au+Au collisions in different centralities are presented. The K*/K yield ratios for all centralities in Au+Au collisions are found to be significantly lower than the ratio in minimum bias p+p collisions, indicating the importance of hadronic interactions between chemical and kinetic freeze-outs. A significant nonzero K*{sup 0} elliptic flow (v{sub 2}) is observed in Au+Au collisions and is compared to the K{sub S}{sup 0} and {lambda} v{sub 2}. The nuclear modification factor of K* at intermediate p{sub T} is similar to that of K{sub S}{sup 0} but different from {lambda}. This establishes a baryon-meson effect over a mass effect in the particle production atmore » intermediate p{sub T} (2
TL;DR: The aim of this study was to show the influence of the light intensity of curing units Elipar Trilight, Astralis 7 and Lux-o-Max unit on temperature rise in composite resin sample of Tetric Ceram.
Abstract: The unavoidable consequence of composite resin photopolymerization is temperature rise in tooth tissue. The temperature rise depends not only on the illumination time, but also on light intensity, distance of light guide tip from composite resin surface, composition and shade of composite resin and composite thickness. The most commonly used units for polymerization today are halogen curing units, which emit a large spectrum of wavelengths. A proportion of the spectrum has no influence on degree of conversion and therefore causes unnecessary temperature rise. Units based on light source - blue light emitting diodes (LED), as an alternative for halogen curing units, have been introduced in clinical practice. The aim of this study was to show the influence of the light intensity of curing units Elipar Trilight, Astralis 7 and Lux-o-Max unit on temperature rise in composite resin sample of Tetric Ceram. The temperature was measurement with Metex M-3850 D multimeter with the tip of temperature probe put into unpolymerized composite resin sample 1 mm depth. The highest temperature rise was recorded with standard curing mode for Elipar Trilight halogen curing unit (13.3 +/- 1.21 degrees C after 40 s illumination), while the lowest temperature rise was recorded for the Lux-o-Max unit based on LED technology (5.2 +/- 1.92 degrees C after 40 s illumination).
TL;DR: In this paper, the first measurement of elliptic flow of multi-strange baryons in heavy-ion collisions is reported, showing that a substantial fraction of the observed collective motion is developed at the early partonic stage in ultrarelativistic nuclear collisions at RHIC.
Abstract: We report on the first measurement of elliptic flow $v_2(p_T)$ of multi-strange baryons $\Xi+\bar{Xi}$ and $\Omega+\bar{Omega} in heavy-ion collisions. In minimum bias Au+Au collisions at sqrt(s_NN) = 200 GeV, a significant amount of elliptic flow, comparable to other non-strange baryons, is observed for multi-strange baryons which are expected to be particularly sensitive to the dynamics of the partonic stage of heavy-ion collisions. The $p_T$ dependence of $v_2$ of the multi-strange baryons confirms the number of constituent quark scaling previously observed for lighter hadrons. These results support the idea that a substantial fraction of the observed collective motion is developed at the early partonic stage in ultra-relativistic nuclear collisions at RHIC.