Cadmium Content of South African Table Wines

Red and white South African table wines from the major wine producing districts were analysed for cadmium content. Only three wines had a slightly higher concentration than 0,010 mg/ t The average cadmium concentration was 0,003 mg/ f, and no relationship between cadmium content and origin could be determined

Fuzzy Topology, Quantization and Gauge Invariance

Dodson-Zeeman fuzzy topology considered as the possible mathematical framework of quantum geometric formalism. In such formalism the states of massive particle m correspond to elements of fuzzy manifold called fuzzy points. Due to their weak (partial) ordering, m space coordinate x acquires principal uncertainty dx. It's shown that m evolution with minimal number of additional assumptions obeys to schroedinger and dirac formalisms in norelativistic and relativistic cases correspondingly. It's argued that particle's interactions on such fuzzy manifold should be gauge invariant.Comment: 12 pages, Talk given on 'Geometry and Field Theory' conference, Porto, July 2012. To be published in Int. J. Theor. Phys. (2015

Observation of light dragging in rubidium vapor cell

We report on the experimental demonstration of light dragging effect due to atomic motion in a rubidium vapor cell. We found that the minimum group velocity is achieved for light red-shifted from the center of the atomic resonance, and that the value of this shift increases with decreasing group velocity, in agreement with the theoretical predictions by Kocharovskaya, Rostovtsev, and Scully [Phys. Rev. Lett. {\bf 86}, 628 (2001)].Comment: 4 pages 4 figures, submitted to PR

Congenital pseudarthrosis of the tibia : treatment with free vascularised fibular grafts

CITATION: Smith, C. S. F., Zeeman, V. R. B. J. & Wade, W. J. 1993. Congenital pseudarthrosis of the tibia : treatment with free vascularised fibular grafts. South African Medical Journal, 83:750-752.The original publication is available at http://www.samj.org.zaCongenital pseudarthrosis is uncommon. We report on a series of 4 patients treated by means of free vascularised fibular grafts. Complications encountered were graft fracture, delayed union and angulation deformities. Modifications in the surgical technique improved later results. We recommend wide excision of pathological bone, bridging of the defect by free vascularised fibular grafts and rigid fixation.Publisher’s versio

Fuzzy Geometry of Phase Space and Quantization of Massive Fields

The quantum space-time and the phase space with fuzzy structure is investigated as the possible quantization formalism. In this theory the state of nonrelativistic particle corresponds to the element of fuzzy ordered set (Foset) - fuzzy point. Due to Foset partial (weak) ordering, particle's space coordinate x acquires principal uncertainty dx. It's shown that Shroedinger formalism of Quantum Mechanics can be completely derived from consideration of particle evolution in fuzzy phase space with minimal number of axioms.Comment: 13 pages, Talk given at QFEXT07 Workshop, Leipzig, Sept. 200

Die aanwending van distillasieprodukte by die gisting van mos

Thesis (MSc)--Stellenbosch University, 1958.ENGLISH ABSTRACT: no abstract availableAFRIKAANSE OPSOMMING: geen opsommin

Analysis of a three-component model phase diagram by Catastrophe Theory

We analyze the thermodynamical potential of a lattice gas model with three components and five parameters using the methods of Catastrophe Theory. We find the highest singularity, which has codimension five, and establish its transversality. Hence the corresponding seven-degree Landau potential, the canonical form Wigwam or $A_6$, constitutes the adequate starting point to study the overall phase diagram of this model.Comment: 16 pages, Latex file, submitted to Phys. Rev.

Medicated-Assisted Treatment and 12-Step Programs: Evaluating the Referral Process

Purpose/Background Overdose deaths in the U.S. from opioids have dramatically increased since the COVID-19 pandemic. Although medicated-assisted treatment (MAT) programs are widely available for sufferers of opiate addiction, many drop out of treatment prematurely. Twelve-step programs are considered a valuable part of treatment, but few studies have examined the effect of combining these approaches. We aimed to compare abstinence rates among patients receiving MAT who were referred to 12-step programs to those only receiving MAT. Methods In this prospective study, a cohort of participants from a MAT clinic agreeing to attend a 12-step program was compared to 15 controls selected from a database before project implementation. Eligible participants were diagnosed with OUD, receiving buprenorphine (opiate agonist), and at least 18. Participants were provided with temporary sponsors to attend Narcotics Anonymous, Alcoholics Anonymous, and Medication-Assisted Recovery meetings together. The primary endpoint was the change in positive opiate urine drug screens over 6 months between participants and controls. Results Between March 29, 2021, and April 16, 2021, 166 patients were scheduled at the clinic. Of those scheduled, 146 were established patients, and 123 were scheduled for face-to-face visits. Of these, 64 appeared for the appointment, 6 were screened, and 3 were enrolled. None of the participants attended a 12-step meeting. Enrollment barriers included excluding new patients and those attending virtual visits, the high percentage of patients who missed appointments, and lack of staff referrals. The low incidence of referrals was due to time constraints by both staff and patients. Implications for Nursing Practice Low enrollment limited our ability to determine whether combining medication management with a 12-step program improves abstinence. Failure to keep appointments is common among patients with OUD, and virtual meetings are becoming more prevalent post-COVID. Although these factors are unlikely to be controllable, developing strategies to expedite the enrollment process for staff and patients could hasten recruitment

Relativistic Effects of Light in Moving Media with Extremely Low Group Velocity

A moving dielectric medium acts as an effective gravitational field on light. One can use media with extremely low group velocities [Lene Vestergaard Hau et al., Nature 397, 594 (1999)] to create dielectric analogs of astronomical effects on Earth. In particular, a vortex flow imprints a long-ranging topological effect on incident light and can behave like an optical black hole.Comment: Physical Review Letters (accepted