Bis(3-methyl­anilinium) sulfate

In the crystal structure of the title salt, 2C7H7NH3 +·SO4 2−, the cations inter­act with the oxyanions through strong charge-assisted N—H⋯O hydrogen bonds

1-(2-Aza­niumyleth­yl)piperazine-1,4-diium trinitrate

In the title salt, C6H18N3 3+·3NO3 −, the piperazine ring adopts a chair conformation and the ethyl­ammonium group is equatorial relative to the piperazine ring, and in an all-trans conformation. In the crystal, strong charge-assisted N—H⋯O hydrogen bonds link the piperazinediium trications and the nitrate anions into a three-dimensional networ

A comparison between the Mini-Mental State Examination and the Montreal Cognitive Assessment Test in schizophrenia

BACKGROUND : Cognitive impairment is a core feature of schizophrenia that also has strong prognostic significance. In most clinical settings comprehensive neuropsychological testing to detect cognitive impairment in schizophrenia patients is not readily available, but because cognitive deficits in schizophrenia are clinically important it would be useful to detect or at least screen for them in a clinical setting. Unfortunately there are no validated, brief screening instruments for the detection of cognitive impairment in schizophrenia. Nevertheless, the Montreal Cognitive Assessment Test (MoCA) and the Mini-Mental State Examination (MMSE) show promise in this regard. The objective of this study was to compare the results of the MMSE and MoCA in a group of outpatient schizophrenia sufferers to contribute to research into the instruments’ potential usefulness as screening tools for cognitive impairment in schizophrenia. METHOD : The Afrikaans versions of the MMSE and MoCA were administered to Afrikaansspeaking adult outpatients. Participants had at least seven years of formal education and had been in partial or full remission for at least 3 months. The MMSE and MoCA scores for each participant were matched and compared using the non-parametric Wilcoxon matched pairs test. RESULTS : The sample consisted of 30 Afrikaans-speaking outpatients with schizophrenia. The mean MMSE score was 27.17 ± 2.64, and the mean MoCA score was 22.53 ± 3.91. There was a statistically significant difference between participants’ performance on the MMSE and MoCA tests (p = 0.000008). CONCLUSION : Compared to the MMSE, the MoCA may be a more useful instrument to detect cognitive impairment in patients with schizophrenia. Further studies are required.http://www.sajpsychiatry.orgam2016Psychiatr

Factors that influence the geometric detection pattern of vehicle-based licence plate recognition camera systems

CITATION: Rademeyer, M. C., Booysen, M. J. & Barnard, A. 2018. Factors that influence the geometric detection pattern of vehicle-based licence plate recognition camera systems. In Southern African Transport Conference, 9-12 July 2018, Pretoria, South Africa.The original publication is available at http://www.satc.org.zaLicence plate recognition (LPR) systems are used to automatically extract the characters from licence plates positioned in front of a camera. The geometric detection pattern is the region within which the system can accurately recognise licence plates and is of special interest when the system is mounted in a moving vehicle. In this research, the theory surrounding camera optics was investigated and used as the basis of a software simulation model. Inspired by the simulation measurements, a real-world experimental test was conducted to further explore the influence various factors have on the geometric detection pattern. Analysis of these measurements provided greater insight how multiple factors individually contribute to the shape and size of the geometric detection pattern and serves as a guide in the design of vehicle-based LPR systems.Post-prin

Dehydro­brachylaenolide: an eudesmane-type sesquiterpene lactone

The three-ring eudesmanolide, C15H16O3, is a natural product isolated from Dicoma anomala Sond. (Asteraceae). The compound contains an endo–exo cross conjugated methyl­enecyclo­hexenone ring with an envelope conformation trans-fused with cyclo­hexane and trans-annelated with an α-methyl­ene γ-lactone. The absolute structure was assigned by optical rotation measurements compared to those from the synthetic compound with known stereochemistry. The crystal packing is consolidated by C—H⋯O interactions

Satellite ligand effects on magnetic exchange in dimers. A structural, magnetic and theoretical investigation of Cu2L2X4 (L = methylisothiazolinone and X = Cl−, Br−)

Halide-bridged polymers have gained significant interest due to their diverse properties and potential applications. Stacked Cu2L2X4 dimers, where L is an organic ligand and X can be Cl− or Br−, are of interest because a chloride analogue where L = 2-pyridone, had previously been reported to exhibit bulk ferromagnetism, which augured great potentiality for this class of compounds. The synthesis, structural characterization, magnetic susceptibility measurements, and computational studies of two isostructural CuClMI (MI = methylisothiazolinone) and CuBrMI polymers of Cu(ii), along with a related CuClPYR (PYR = 2-pyridone) is reported. CuClMI and CuBrMI were found to exhibit AFM bulk properties, due to FM/AFM alternating chains along the halide-bridged polymer axis, while FM bulk properties were confirmed for CuClPYR exhibiting a FM spin ladder. In combination with a benzamide analogue, CuClBA, three O-donor amides, CuClMI, CuClBA and CuClPYR were analyzed and revealed that the kinetic exchange is affected by the identity, but more importantly, the orientation of the satellite ligands. The torsional angle of the ligand with the dimer plane is shown to significantly affect the magnetic exchange in the dimer, and between dimers, explaining the reported FM bulk properties of CuClPYR. This finding is exceedingly important, as it suggests that a spin device can be constructed to flip between singlet/triplet states by manipulating the orientation of the satellite/terminal ligand. © 2023 The Royal Society of Chemistry. This article includes supplementary data, also available for download

2-Chloro-3-fluoropyridine copper(II) complexes and the effect of structural changes on magnetic behavior

Please read abstract in the article.http://www.tandfonline.com/loi/gcoo202019-10-17hj2019Chemistr

Applying supervised machine learning to predict optimal playing positions for rugby players

https://drive.google.com/file/d/1-0IzahwQxlA5IJhjWX3d3wWPzqj5G1dD/view?usp=sharinghttps://drive.google.com/drive/folders/1Kq-9Vr8xmi_vOmvGZfPCjX62tuxq02xS?usp=sharinghttps://drive.google.com/drive/folders/1p2-BLglFh0k-ILOs6gba4TML22L9nKoY?usp=sharin

Phenyl­methanaminium chloro­acetate

In the title compound, C7H10N+·C2H2ClO2 −, the planar chloracetate ion [with a maximum deviation of 0.025 (3) Å] is oriented at a dihedral angle of 31.07 (4)° with respect to the planar [maximum deviation of 0.022 (3) Å] phenyl­methanaminium cation. In the crystal structure, inter­mol­ecular N—H⋯O hydrogen bonds link the mol­ecules into a network. A weak C—H⋯π inter­action is also present