3,906 research outputs found
Discovery of very high energy gamma-ray emission coincident with molecular clouds in the W 28 (G6.4-0.1) field
No full textAims. Observations of shell-type supernova remnants (SNRs) in the GeV to multi-TeV γ-ray band, coupled with those at millimetre radio
wavelengths, are motivated by the search for cosmic-ray accelerators in our Galaxy. The old-age mixed-morphology SNRW28 (distance ∼2 kpc)
is a prime target due to its interaction with molecular clouds along its northeastern boundary and other clouds situated nearby.
Methods. We observed theW28 field (for ∼40 h) at very high energy (VHE) γ-ray energies (E > 0.1 TeV) with the HESS. Cherenkov telescopes.
A reanalysis of EGRET E > 100 MeV data was also undertaken. Results from the NANTEN 4 m telescope Galactic plane survey and other
CO observations were used to study molecular clouds.
Results. We have discovered VHE γ-ray emission (HESS J1801−233) coincident with the northeastern boundary of W 28 and a complex
of sources (HESS J1800−240A, B and C) ∼0.5◦ south of W 28 in the Galactic disc. The EGRET source (GRO J1801−2320) is centred on
HESS J1801−233 but may also be related to HESS J1800−240 given the large EGRET point spread function. The VHE differential photon spectra
are well fit by pure power laws with indices Γ ∼ 2.3 to 2.7. The spectral indices of HESS J1800−240A, B, and C are consistent within statistical
errors. All VHE sources are ∼10 in intrinsic radius except for HESS J1800−240C, which appears pointlike. The NANTEN 12CO(J = 1−0) data
reveal molecular clouds positionally associating with the VHE emission, spanning a ∼15 km s−1 range in local standard of rest velocity.
Conclusions. The VHE/molecular cloud association could indicate a hadronic origin for HESS J1801−233 and HESS J1800−240, and several
cloud components in projection may contribute to the VHE emission. The clouds have components covering a broad velocity range encompassing
the distance estimates forW28 (∼2 kpc) and extending up to ∼4 kpc. Assuming hadronic origin and distances of 2 and 4 kpc for cloud components,
the required cosmic-ray density enhancement factors (with respect to the solar value) are in the range ∼10 to ∼30. If situated at 2 kpc distance,
such cosmic-ray densities may be supplied by SNRs like W 28. Additionally and/or alternatively, particle acceleration may come from several
catalogued SNRs and SNR candidates, the energetic ultra compact HII region W 28A2, and the HII regions M 8 and M 20, along with their
associated open clusters. Further sub-mm observations would be recommended to probe in detail the dynamics of the molecular clouds at velocites
>10 km s−1 and their possible connection to W 2
Bradyrhizobium oropedii Avontuur & Palmer & Beukes & Chan & Tasiya & Zyl & Coetzee & Stepkowski & Venter & Steenkamp 2022, sp. nov.
No full text4.2. Description of Bradyrhizobium oropedii sp. nov. Bradyrhizobium oropedii (o.ro.pe’ di.i. Gr. neut. n. oropedion mountain plain; N.L. gen. n. oropedii, of the central Southern African plateau, from where the species was isolated). Cells are motile, Gram-negative, rod shaped and approximately 1.87 × 0.48 μm in size. Growth occurs on YMA at 28 ◦ C after 7 days and colonies are translucent to opaque, circular, convex and cream in colour. Grows at pH values ranging from 5 to 10 and at temperatures ranging from 15 to 35 ◦ C. Isolates are unable to grow in the presence of more than 0.5% NaCl (w/v). Strains tested positive for oxidase, catalase, urease and β- glucosidase activity as well as the production of Tween 40 and Tween 80. Tested positive for the following carbon sources: Dfructose, L-fructose, D-gluconic acid, D-mannitol, α and β- hydroxy butyric acid, p-hydroxy phenylacetic acid, L-alaninamide, L-lactic acid, L-leucine, D-saccharic acid, and urocanic acid. Negative reactions were recorded for indole production and the assimilation of capric acid, adipic acid, malic acid, glycogen, α- D-lactose, N-acetyl-D-galactosamine, α- cyclodextrin, Adonitol, D-cellobiose, D-raffinose, i-erythritol, maltose, lactulose, D-melibiose, sucrose, D-trehalose, turanose, xylitol, L-threonine, uridine, inosine, thymine, glucose-1-phosphate and glucose-6-phosphate, and m-inositol. Resistant to ampicillin (10 μg/ml), chloramphenicol (30 μg/ml), tetracycline (30 μg/ml), penicillin (10 μg/ ml), and susceptible to streptomycin (25 μg/ml). The type strain, Pear76 T (=SARCC 731 = LMG 31408) was isolated from root nodules of Pearsonia obovata in the Dullstroom area of the Mpumalanga Province, South Africa and forms effective nodules on cowpea (Vigna unguiculata) and siratro (Macroptilium atropurpureum). The DNA G + Ccontent of the type strain is 63.5 mol%. GenBank/ EMBL/DDBJ accession numbers for the genome sequence and the gene sequences of this type strain are: whole genome (JACMYO000000000) and 16S rRNA (LR877297), atpD (LN650103), glnII (LN650145), dnaK (LN650124), gyrB (LN650208), rpoB (LN650187) and nodA (LN650250).Published as part of Avontuur, Juanita R., Palmer, Marike, Beukes, Chrizelle W., Chan, Wai Y., Tasiya, Taponeswa, Zyl, Elritha van, Coetzee, Martin P. A., Stepkowski, Tomasz, Venter, Stephanus N. & Steenkamp, Emma T., 2022, Bradyrhizobium altum sp. nov., Bradyrhizobium oropedii sp. nov. and Bradyrhizobium acaciae sp. nov. from South Africa show locally restricted and pantropical nodA phylogeographic patterns, pp. 1-13 in Molecular Phylogenetics and Evolution (107338) (107338) 167 on page 10, DOI: 10.1016/j.ympev.2021.107338, http://zenodo.org/record/572835
Water quality of the upper Orange River
No full textEnglish: The Upper Orange River is defined as the region between the source in the Drakensberg (Lesotho)
and the Orange-Vaal confluence. Information on the water quality, phytoplankton composition
and the influence of the dams on the Upper Orange River is limited. This study was conducted in
order to determine seasonal and spatial patterns in the river system., as well as to determine the
influence of the tributaries and the two major dams on the river system. Physical, chemical and
biological factors were taken into account.
Hypolimnetic water released from the Gariep and Vanderkloof Dams caused a significant decrease
in the temperature downstream of the dams. The dams acted as sediment traps and caused the TSS
and turbidity in the river system to decrease. A decrease in turbidity resulted in an increase in the
light penetration. This created more favourable conditions for primary production and led to algal
blooms in the dams.
The dams are used for hydro-electric power generation and almost completely diminished seasonal
flow patterns. This changed the Upper Orange River into a highly regulated system. The
interference with seasonal flow patterns in the river is probably one of the main reasons for
outbreaks of the pest blackfly, Simulium chutteri downstream of the dams.
The oxygen-depth profile in the Gariep Dam during summer stratification indicated relatively high
dissolved oxygen concentrations in the epilimnion (8.2 mg.l-1) and anoxic, near anaerobic,
conditions (0.1 mg.l-1) in the hypolimnion. The oxygen decline in the hypolimnion was indirectly
the cause of high algal production in the epilimnion during algal blooms.
The average pH of the Upper Orange River system was mainly alkaline at 8.1, with an average
total alkalinity of 95.2 mg CaC03.rl. This suggested that the Upper Orange River is a wellbuffered
system.
The average conductivity in the Upper Orange River was relatively low at 19.6 mS.m-1, but
increased significantly since 1980. Major ions at Aliwal North occurred in the following
proportions, i.e. Ca> Na > Mg > K for cations and CO3 > Cl> SO4 for anions. In the Gariep Dam and at Marksdrift the proportions were: Na > Ca > Mg > K for cations and CO3 > Cl > SO4 for
anions.
The average P04-P concentration was relatively low at 28.3 µg.l-1 and the average TP
concentration was 107 µg.I-1. The average N03-N concentration was high at 312 µg.l-1 and
increased in the dams and downstream probably due to agricultural fertilizers and nitrogen fixation
by algae.
The average chlorophyll a concentration ranged between 0.4 and 1084 µg.I-1, with and average
concentration of 10.8 µg.l-1. The very high chlorophyll a concentration was due to a bloom of
Microcystis sp. during February in the Gariep Dam. Phytoplankton dynamics manifested
themselves in seasonal cycles. Cyanobacteria and Bacillariophyceae dominated during warmer
months. The Chlorophyceae replaced cyanobacteria during cooler months.
Light penetration in the Gariep Dam and the Vaal River had a major effect on the primary
production. The maximum primary production in the Gariep Dam was 14.6 mg C. mg Chla-1 h-1
and in the Vaal River the maximum primary production was 76 mg C. mg Chla-l. h-1. According
to the primary production in the Gariep Dam it can be classified as mesotrophic, while the high
primary production in the Vaal River indicated eutrophic conditions.
The dams exert major influences on the physical, chemical and biological parameters in the river.
Low SASS4 scores were obtained and are an indication of poor water quality. This could be
ascribed to disturbances by the dams. The serial discontinuity concept (SDC) is applicable in the
Upper Orange River. It is likely that agricultural runoff, as well as urban and industrial pollution
from the Vaal River catchment would mask the downstream recovery after the Orange- Vaal
confluence.Afrikaans: Die Bo-Oranjerivier kan gedefinieer word as die gebied tussen die oorsprong in the Drakensberge (Lesotho) en die Oranje-Vaal samevloei. Beperkte inligting is beskikbaar oor die waterkwaliteit en die invloed van die damme op die Bo-Oranjerivier. Die doel van die studie was om seisoenale and ruimtelike veranderinge in die rivierstelstel te bepaal, sowel as om te kyk na die invloed van die sytakke en die twee groot damme op die rivierstelstel. Fisiese, chemiese en biologiese faktore is ondersoek.
Water wat vrygestel is vanuit die hipolimnion in die Gariep en Vanderkloof damme het gelei tot betekenisvolle verlaging in die watertemperatuur in die rivierstelsel onder die damme. Die damme het sediment teruggehou en dit het gelei tot verlaagde totale gesuspendeerde materiaal (TSS) en dus ook verlaagde troebelheid. Verlaagde troebelheid het verbeterde ligindringing tot gevolg gehad, wat gunstige toestande geskep het vir algopbloeie.
Die damme, wat gebruik word vir hidro-elektriese kragopwekking, het seisoenale vloeipatrone feitlik heeltemal uitgewis en dus die Bo-Oranjerivier verander in 'n hoogs gereguleerde stelsel. Die verandering in seisoenale vloei patrone is moontlik een van die hoof oorsake van die probleme wat onder die damme ondervind word met die swartvliegie, Simulium chutteri.
Die suurstof-diepte profiel in die Gariep dam gedurende somer stratifikasie het relatief hoë konsentrasies opgeloste suurstof getoon in die epilimnion (8.2 mg.l-1) en feitlik anoksiese toestande in die hipolimnion (0.1 mg.I-1). Die lae suurstof konsentrasies in die hipolimnion was die indirekte gevolg van die hoë alg produksie in die epilimnion gedurende 'n opbloei.
Die gemiddelde pH (8.1) was hoofsaaklik alkalies, met 'n gemiddelde totale alkaliniteit van 95.2 mg CaC03.l-1 . Dit dui daarop dat die Bo-Oranjerivier stelstel goed gebuffer is.
Die geleiding in die Bo-Oranjerivier was relatief laag met 'n gemiddeld van 19.6 mS.m-1. Die samestelling van makro ione by Aliwal Noord was soos volg: . Ca > Na > Mg > K vir katione en CO3 > Cl > SO4 vir anione. Die samestelling in die Gariep dam en by Marksdrift was soos volg: Na> Ca > Mg > K vir katione en CO3 > Cl > SO4 vir anione.
Die gemiddelde konsentrasie PO4-P was relatief laag teen 28.3 µg.l-1 en die gemiddelde konsentrasie TP was 107 µg.l-1. The gemiddelde konsentrasie N03-N was hoog teen 312 µg.l-1 en het vermeerder stroom-af moontlik a.g.v. bemestingstowwe en stikstof-vaslegging deur alge.
Die chlorofil α konsentrasie het gewissel tussen 0.4 en 1 084 µg.l-1 met gemiddeld 10.8 µg.l-1. Die hoë konsentratsie was as gevolg van 'n Microcystis opbloei in die Gariep dam gedurende Februarie. Fitoplankton dinamika het seisoenale patrone gevolg. Cyanobakterieë en Bacillariophyceae het gedomineer gedurende die warmer maande en Chlorophyceae het cyanobakterieë vervang gedurende die koeler maande.
Primêre produksie in die Gariep dam en in die Vaalrivier is hoofsaaklik bepaal deur ligindringing. Maksimum produktiwiteit in die Gariep dam was 14.6 mg C. mg Chla-1 . h-1 en in die Vaalrivier was dit 76 mg C. mg Chla-1 . h-1 . Na aanleiding van die primêre produksie kan die Gariep dam geklassifiseer word as mesotrofies, terwyl die hoë produksie in die Vaalrivier dui op eutrofiese toestande.
Die damme beïnvloed die fisiese, chemiese en biologiese toestande in die rivier. Lae SASS4 waardes is gevind, wat op swak waterkwaliteit dui. Die lae waardes kan toegeskryf word aan die versteuring van die rivierstelsel deur die damme. Die SDC (serial discontinuity concept) is van toepassing op die Bo-Oranjerivier. Dit is moontlik dat die herstel van die rivier stroomaf verskans kan word deur afloop vanaf landbou bemestingstowwe, sowel as deur stedelike en industriële besoedeling vanaf die Vaalrivier opvangsgebied, na die Oranje-Vaal samevloei
Application of data analytics to transport corridor diagnostics and performance benchmarking
No full textIncrease in exports is essential for economic growth in developing countries. In Southern Africa the development of effective multi-national trade corridors is the single biggest stumbling block to achieve this objective. Continuous performance measurement of all key trade corridor activities will facilitate the identification and elimination of bottle necks that currently restrict the free flow of trade. This article describes a methodology to implement continuous corridor performance measurement as necessary step to achieve the larger goal of improved corridor performance and hence increase in exports. It is described how performance benchmarks for road freight transport were established by leveraging data that is available from existing systems operated by corridor users. We also discuss the challenges to establish a permanent system of corridor performance measurement that will include not only physical cargo movements but also the detailed transactions to move cargo across national borders and through port
Faculty Day 2005
No full textThe material has been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.Oral presentations: Sir Arnold Theiler Memorial Lecture: "The Past, Present and Future of the Clinical Departments in the Faculty of Veterinary Science" / S S van den Berg -- Comparative morphology of African buffalo (Syncerus caffer) and domestic cow (Bos taurus) placentomes and full term cotyledons / S Schmidt, D Gerber, J Soley, T Aire, A Boos -- Mechanisms by which Lumpy Skin Disease Virus is shed in the semen of artificially infected bulls / C H Annandale, V P Bag/a, E H Venter, PC Irons -- Absence of Lumpy Skin Disease Virus in semen of vaccinated bulls / U I Osuagwuh, C H Annandale, V Bagla, E H Venter, P C Irons -- Luteal and follicular count in bitches: assessment by means of magnetic resonance imaging / K G M de Cramer, J 0 Norhling, D Gerber, V R Kammerl -- Ultrastructural features of healthy and atretic ovarian follicles in the sexually immature ostrich (Struthio came/us) / W H Kimaro, M-C Madekurozwa -- Seroprevalence of Feline Immunodeficiency Virus and Feline Leukaemia Virus infection and determination of FIV subtypes in sick domestic cats in South Africa / J P Schoeman, R Kahn, J Meers, J Seddon, T Schoeman, M van Vuuren -- A study of the prognostic usefulness of blood leukocyte changes in canine parvoviral enteritis / A Goddard, A L Leisewitz, N Duncan, M Christopher -- Ultrasonography of the liver, spleen and urinary tract of the cheetah (A cinonyx jubatus) / A Carstens, R M Kirberger, T Spotswood, W M Wagner, R J Grimbeek -- Use of ultrasonography to determine incomplete ossification of the cuboidal bones in a premature equine foal / S M Higgerty, A Carstens -- Diagnosis of suspected hypovitaminosis A using magnetic resonance imaging in African lions (Panthera leo) / M P Hartley, R M Kirberger, M Haagenson, L Sweers -- Is Meloxicam the saviour of the Asian White-Backed Vulture? / V Naidoo, G E Swan, E Kilian, K Wolter, M Dietman, D J Pain, R Cuthbert -- Is diclofenac sodium toxic to African White-Backed Vultures (Gyps africanus)? / G E Swan, V Naidoo, N Duncan, E Kilian, K Wolter, G Verdoorn, P Bartells, D J Pain -- Evaluation of the extent to which grape seed extract induces or depresses expression of the p-glycoprotein pump / H Chikoto, J N Eloff, M Oosthuizen, V Naidoo, A L Leisewitz, G E Swan -- The role of Mycoplasma species in bovine respiratory disease complex in feedlot cattle in South Africa / C A P Carrington -- Evaluation of a method to detect Mycobacterium bovis in formalin-fixed paraffin-embedded tissues of domestic and wild animals / M T Sethusa, E H Venter, A Michel, M Williams -- Demonstration of equine encephalosis virus in tissue culture using immunoperoxidase staining with ultrastructural controls / A D Pardini, G Goosen, M M E Smit, E van Wilpe, P G Howell, A J Guthrie, L Prozesky -- Development of an ELISA for the detection of interferon-gamma as a diagnostic tool for tuberculosis in black rhinoceros (Diceros bicornis) and white rhinoceros (Ceratotherium simum) / D Morar, E Tijhaar, A L Michel, A S Negre, J Godfroid, J A W Coetzer, V P M G Rutten -- Isolation of lumpy skin disease virus (LSDV) from experimentally infected semen samples using different diagnostic techniques / V P Bagla, E H Venter -- The efficacy of a thermostable Newcastle disease vaccine in village chickens when administered by community volunteers - a South African experience / C K Modise, S P R Bisschop, C ME McCrindle, B L Mogoje -- The oral application of the Onderstepoort Biological Products fowl typhoid vaccine, its safety, efficacy and duration of protection in commercial laying hens / C Purchase, S P R Bisschop, J Picard, L Mogoje -- A survey of Campylobacter jejuni/coli in a high throughput poultry abattoir using PCR / A J Bartkowiak-Higgo, C M Veary, E H Venter, A-M Bosman -- Athrixia phylicoides (bush tea): possibilities for a new health-promoting beverage / L J McGaw, J N Eloff -- Antifungal activity of Markhamia species / F Nchu, J N Eloff -- The diversity of antifungal compounds of six South African Terminalia species (Combretaceae) determined by bioautography / P Masoko, J Picard, J N Eloff -- Anthelmintic activity of Peltophorum africanum extracts against parasitic gastrointestinal nematodes of livestock / E S Bizimenyera, J B Githiori, J N Eloff, G E Swan -- Isolation and identification of antioxidants from Bauhinia tomentosa Linn (Fabaceae) / M A Aderogba, A 0 Ogundaini, J N Eloff -- Characterization of South African Theileria parva isolates / K P Sibeko, N Collins, D Geysen -- Molecular characterization and treatment of a chronic Babesia gibsoni infection in South Africa in an imported pit -bull puppy / T P Matjila, B L Penzhorn, A Leisewitz, R Bhoora, R Barker -- Central and peripheral Babesia canis rossi parasitaemias and their association with outcome of infection / M Bohm, A L Leisewitz, P N Thompson, J P Schoeman -- The elevated serum urea: creatinine ratio in canine babesiosis is not of renal origin / M P de Scally, A L Leisewitz, R G Lobetti, P N Thompson -- The impact of two dipping systems on endemic stability to bovine babesiosis and anaplasmosis in cattle at four communally grazed areas in Limpopo Province, South Africa / B 0 Rikhotso, W H Stoltsz, N R Bryson, J E M Sommerville.Poster presentations: Villous architecture and feto-matemal interdigitation in the African buffalo (Syncerus caffer) during different gestation stages 46 / S Schmidt, D Gerber, J Soley, T Aire, A Boos -- Using the organic acid buffer MES to produce Foot and Mouth disease virus-free in vitro embryos / F Jooste, D Gerber, W Vosloo, K de Haas -- Effect of the acidic organic buffer MES on bovine in vitro embryo production / K De Haas, I Luther, F Jooste, D Gerber -- Effects of heterologous seminal plasma and semen extenders on progressive motility of frozenthawed ram sperm / G Mataveia, S J Terblanche, J 0 Nothling, D Gerber -- Validation of two different chromatographic methods for the analises of urinary endogenous steroids in the Nile crocodile (Crocodylus niloticus) / L C Bekker, J G Myburgh, G E Swan -- The microvasculature of the testis, epididymis and proximal ductus deferens of the ostrich (Struthio camelus) as revealed by India ink injection / M Z J Elias, T A Aire, J T Soley -- Immunoreactivity of protein gene product 9 .5, neurofilament protein and neuron specific enolase in the ovary of the sexually immature ostrich (Struthio camelus) / W H Kimaro, M-C Madekurozwa -- The ultrastructure of thecal gland cells in the ovary of the sexually immature ostrich (Struthio camelus) / W H Kimaro, M-C Madekurozwa -- Gross morphological features of the oro-pharyngeal cavity of the ostrich (Struthio camelus) / C Tivane, J T Soley, H B Groenewald--Ultrastructural features of the ductuli efferentes of the ostrich (Struthio camelus) /P C Ozegbe, T A Aire, J T Soley--The genome of the heartwater agent, Ehrlichia ruminantium, contains multiple tandem repeats of actively variable copy number / N E Collins, J Liebenberg, E P de Villiers, K A Brayton, E Louw, A Pretorius, F E Faber, H van Heerden, A Josemans, M van Kleef, H C Steyn, M F van Strijp, E Zweygarth, F Jongejan, J C Maillard, D Berthier, M Botha, F Joubert, N R Thomson, M T Allsopp, B A Allsopp -- Repetitive DNA in the complete genome sequence of Ehrlichia ruminantium / J Liebenberg, N E Collins, E Louw, F E Faber, M van Kleef, B A Allsopp -- 18S sequence data reveals genetic diversity in Theileria equi and Babesia caballi / R Bhoora, N E Collins -- Phylogenetic analysis of Babesia parasites in cheetahs in South Africa / A-M Bosman, M C Oosthuizen, E H Venter, B L Penzhorn -- Piroplasmosis as a possible cause of mortality in giraffes / M C Oosthuizen, N E Collins, B L Penzhorn -- Verification of parentage in African wild dog (Lycaon pictus) packs shows multiple paternity / C Moueix, C Harper, A J Guthrie, H J Bertschinger, M L Schulman -- Identification of anti-babesia! activity for four ethnoveterinary plants in vitro / V Naidoo, E Zweygarth, J N Eloff, G E Swan.ab201
Bradyrhizobium altum Avontuur & Palmer & Beukes & Chan & Tasiya & Zyl & Coetzee & Stepkowski & Venter & Steenkamp 2022, sp. nov.
No full text<i>4.3. Description of Bradyrhizobium altum sp. nov.</i> <p> <i>Bradyrhizobium altum</i> (al’ tum. L. neut. adj. <i>altum</i>, high, referring to the high-altitude region where this species was isolated from).</p> <p>Cells are motile, Gram-negative rods and is approximately 1.29 × 0.45 μm in size. Colonies are circular, convex, opaque, cream in colour and <i><</i> 1 mm in diameteron YMA after 7 daysincubation at 28 ◦ C. The pH range for growth on YMA is 5 to 10 and growth can occur between 15 and 37 ◦ Cand thesestrainscangrowinthe presenceof upto 2.0 % (w/v) NaCl. Reduction of nitrates, β- glucosidase urease, tested positive. It is also positive for the production of L-arabinose, Tween 40, Tween 80, adonitol, N-acetyl-D-glucosamine, D-cellobiose, D-arabitol, D-galactose, D- and L-fructose, m-inositol, D-mannitol, maltose, D-mannose, Draffinose, D-melibiose, L-rhamnose, D-sorbitol, sucrose, xylitol, Dtrehalose, turanose, methyl pyruvate, D-galacturonic acid, acetic acid, malonic acid, propionic acid, D-saccharic acid, quinic acid, sebacic acid, L-asparagine, D- and L-alanine, L-leucine, L-proline, L-ornithine and glycerol. Negative reactions were recorded for glucose fermentation, indole production, β- galactosidase activity and L-arginine dihydrolase. It is also negative for the assimilation of N-acetyl-glucosamine, potassium gluconate, D-maltose, adipic acid, capric acid, malic acid, phenylacetic acid, glycogen, α- cyclodextrin, L-arabinose, i-erythritol, Lthreonine, D- and L-serine, glucose-1-phosphate and glucose-6- phosphate. Strain is resistant to penicillin (10 μg/ml), ampicillin (10 μg/ml), gentamycin (10 μg/ml), chloramphenicol (30 μg/ml) and neomycin (10 μg/ml) and is susceptible to kanamycin (30 μg/ml), erythromycin (30 μg/ml), streptomycin (10 and 25 μg/ml) and tetracycline (30 μg/ml).</p> <p>The type strain Pear77 T (=SARCC 754 = LMG 31407), was isolated from root nodules of <i>Pearsonia obovata</i> collected in the Dullstroom area of the Mpumalanga Province, South Africa. This species forms effective nodules on cowpea (<i>Vigna unguiculata</i>) and siratro (<i>Macroptilium atropurpureum</i>). The DNA G + Ccontent of the type strain is 63.3 mol%. The GenBank/EMBL/DDBJ accession numbers for the genome sequence and gene sequences for this type strain are: whole genome (JACMYP000000000) and 16S rRNA (LR877298), <i>atpD</i> (LN650104), <i>glnII</i> (LN650146), <i>dnaK</i> (LN650125), <i>gyrB</i> (LN650209), <i>rpoB</i> (LN650188) and <i>nodA</i> (LN650251).</p>Published as part of <i>Avontuur, Juanita R., Palmer, Marike, Beukes, Chrizelle W., Chan, Wai Y., Tasiya, Taponeswa, Zyl, Elritha van, Coetzee, Martin P. A., Stepkowski, Tomasz, Venter, Stephanus N. & Steenkamp, Emma T., 2022, Bradyrhizobium altum sp. nov., Bradyrhizobium oropedii sp. nov. and Bradyrhizobium acaciae sp. nov. from South Africa show locally restricted and pantropical nodA phylogeographic patterns, pp. 1-13 in Molecular Phylogenetics and Evolution (107338) (107338) 167</i> on page 10, DOI: 10.1016/j.ympev.2021.107338, <a href="http://zenodo.org/record/5728354">http://zenodo.org/record/5728354</a>
FIGURE 8 in Eleventh Annual Report of Historic Properties at the Phoenix-Mesa Gateway Airport, Mesa, Arizona
No full textFIGURE 8. Acaricis plana female dorsum and venter (after Beard & Gerson 2009).Published as part of Mesa, Nora C., Ochoa, Ronald, Welbourn, W. Calvin, Evans, Gregory A. & De Moraes, Gilberto J., 2009, Eleventh Annual Report of Historic Properties at the Phoenix-Mesa Gateway Airport, Mesa, Arizona, pp. 1-185 in Zootaxa 2098 on page 113, DOI: 10.6067/xcv8426298, http://zenodo.org/record/531629
Toward a more rigorous goodness-of-fit test for evaluation simultaneous radio and gamma-ray pulsar light curve fits
No full textBelewenisse van tuisversorgers van pasiënte met Alzheimer se siekte
No full textEnglish: The ageing of the population and the diminishing of subsidies to old aged homes has
lead to the aged staying in the community and being cared for.
The care and supervision of patients with a chronic condition such as Alzheimer's
disease demands a great deal of time and is usually given by the same person.
The purpose of this study was to investigate and describe the experiences of caregivers
who care for patients with Alzheimer's Disease at home, as well as to describe the
caring environment and the profile of the caregiver in order to develop guidelines that
would·support these persons.
This is a qualitative study with a quantitative component that is contextual with the
purpose to explore and describe. The phenomenological approach is used in the
study.
Caregivers that meet with the following criteria were included in this study:
Persons that are primarily responsible for the caregiving of patients who have
been clinically diagnosed with Alzheimer's disease.
Afrikaans or English mother tongue speakers, enabling the researcher to easily
understand the described experiences of the caregivers
Ethical matters were discussed with the respondents before informed consent was
obtained.
Data collection was done in two phases. In phase I, the qualitative section, a
phenomenological interview was done with the caregiver, in which a description of the
experience as caregiver was given. In phase II, the qualitative component, a
questionnaire was completed by the researcher, to establish the caregiving environment
and the profile of the caregiver.
A pilot study was done beforehand and no problems concerning the execution of the
study were identified.
Data collection was sustained until saturation of data was reached. Saturation was
reached after nine interviews.
A recording was made during. each interview and transcribed thereafter. The
transcription of the interview was analysed by using a systematic process as explained
by Tesch in Creswell (1994:155).
The SAS-computer programme was used in the analyzing of the questionnaires.
The scientific trustworthiness of the study was ensured by credibility, transferability,
reliability and confirmability.
It became clear during data analyzing and review of the literature that these caregivers
had negative experiences of home care of Alzheimer's patients.
Information obtained from the data and literature made it possible to compose
guidelines for support to the caregivers. The guidelines focussed on emotional and
practical assistance.Afrikaans: Die veroudering van die populasie en die afskaling van subsidies aan
bejaardesorgeenhede het daartoe gelei dat bejaardes al hoe meer in die gemeenskap
bly woon en daar versorg word.
Met 'n chroniese toestand soos Alzheimer se siekte word baie tyd aan versorging en
toesig afgestaan. Dit is meestal dieselfde persoon wat deurentyd na hierdie pasiënt
omsien.
Die doel van hierdie studie was om die belewenisse van tuisversorgers van pasiënte
met Alzheimer se siekte te ondersoek en te beskryf, asook om die
versorgingsomgewing en die profiel van die tuisversorger te beskryften einde riglyne
vir ondersteuning aan tuisversorgers te ontwikkel.
Hierdie is 'n kwalitatiewe studie met 'n kwantitatiewe komponent, wat kontekstueeel
van aard is, met die doelom te verken en te beskryf Die fenomenologiese
benadering is in hierdie studie gebruik.
Tuisversorgers wat aan die volgende insluitingskriteria voldoen het, is by die studie
ingesluit:
Persone wat primêr verantwoordelik is vir die tuisversorging van pasiënte met
klinies gediagnoseerde Alzheimer se siekte. Pasiënte se diagnose moet deur
'n algemene praktisyn bevestig wees.
Persone met Afrikaans of Engels as moedertaal, sodat belewenisse makliker deur
die navorser begryp kan word.
Etiese kwessies is met respondente bespreek alvorens ingeligte toestemming verkry is.
Data-insameling het in twee fases plaasgevind. In fase I, die kwalitatiewe deel, is 'n
fenomenologiese onderhoud met die tuisversorger gevoer, waartydens 'n beskrywing
van hul belewenis as tuisversorger gegee is. In fase II, die kwantitatiewe komponent,
is 'n vraelys deur die navorser voltooi, ten einde die versorgingsomgewing en die
profiel van die tuisversorger te bepaal.
'n Loodsstudie is vooraf uitgevoer, maar geen probleme rakende die uitvoer van die
navorsing is geïdentifiseer nie.
Data-insameling is volgehou totdat saturasie van data bereik was. Saturasie is na nege
onderhoude bereik.
Tydens die onderhoud is die gesprek op band geneem en daarna getranskribeer. Die
getranskribeerde gesprek is geanaliseer deur gebruik te maak van 'n sistematiese proses
soos uiteengesit deur Tesch in Creswell (1994: 155).
Die SAS-rekenaarprogram is gebruik in die analisering van die vraelys.
Die wetenskaplike egtheid van die studie is verseker deur geloofwaardigheid,
oordraagbaarheid, vertroubaarheid en bevestigbaarheid te verseker.
Tydens data-analise en literatuurkontrole het dit duidelik geblyk dat tuisversorgers
die versorging van pasiënte met Alzheimer se siekte baie negatief beleef.
Uit die data en literatuur was dit moontlik om riglyne vir ondersteuning aan
tuisversorgers saam te stel. Daar is gefokus op emosionele en praktiese hulp
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