83 research outputs found
Specimen of black primrose, ca.1920
No full textPhotograph of a specimen of black primrose, ca.1920. Six blossoms are shown growing from the stalk below, which is riddled with small leaves. A neutral background can be seen behind.; "This is a large group of plants commonly known as the Primrose. They are mostly hardy perennial herbs and are natives of Europe and temperate Asia, Java and North America. Only one kind, P. magellanica, is found south of the Equator, in southern South America. Some Primroses, such as P. vulgaris, the English Primrose, bear their flowers singly on stems that rise straight from the base of the plant. Others, such as P. denticulata, P. obconica and P. elatior, produce their clusters of flowers in a head or umbel at the top of the flower stem. In another group, the flowers grow in an array of whorls spaced along the upper portions of the flower stems. Some Primroses can be grown in the rock garden, waterside or bog garden, some in the wild or woodland garden and others are suitable for growing in flowerbeds, greenhouses and gardens. The summers are too hot over most of the U.S. for growing many of the Primroses, but in the Pacific Northwest and other favorable areas many can be cultivated successfully. Only a few of the most tolerable plants can be grown in climates that are hot and dry. Hardy Primroses may be divided into two main categories: the bog or woodland kinds and the cliff and rock dwellers. There are also many Primroses that could be called meadow plants, because they grow best in the garden in beds of loam. Primroses that are grown in a greenhouse make gorgeous potted plants that bloom in late autumn, winter and early spring. The Chinese Primroses, which are varieties of P. sinensis, are favorites. There are two main types of Chinese Primroses, the large-flowered, which produce clusters of large flowers and the small-flowered or star (stellata) varieties, which grow tall and bear sprays of beautiful blossoms for many weeks in the winter and early spring. The small-flowered varieties are easier to grow than the Primroses with the larger flowers." -- unknown author
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A study of John Clare in his historical and political context
No full textAs the title indicates, the basis of the thesis is to set John Clare’s life and work within the context of the social and political history of his time. It is a study that is long overdue. The manner in which topical and political matters were mediated to him and were reflected in his work are analysed. His introduction to the literary and social worlds of Stamford and London is evaluated, and the advantages and disadvantages of patronage assessed. The active and complex political culture of Stamford has been taken into account as this may have affected his later political statements and a growing awareness of his audience. His antagonism to enclosure and the social changes that it engendered are considered. Three major questions that arise from this are addressed. The two local newspapers that Clare is known to have read are used throughout. His correspondence with friends, colleagues and casual correspondents has provided valuable insights as have his poetry and prose writings. Research in the Northamptonshire Record Office has revealed important new information in the form of one book of Enclosure Commissioners’ Minutes dated 1809-14, the first five years of the enclosure of Helpstone, Clare’s native village
“I had Walked the Damascus Road, Seen the Light, Repented of Past Transgressions…and Switched to Viola.” AN ANNOTATED INDEX OF THE LETTERS OF WILLIAM PRIMROSE
No full textThis project was designed to create an index to the over 5,000 letters of the violist William Primrose that are held in the Primrose International Viola Archive (PIVA) at Brigham Young University. This index will be an aid to violists or others interested in researching aspects of the life and career of William Primrose through his letter. After my work on the index it is over halfway completed. As it is with many archival projects, this was a great task for one undergraduate. Dr. Claudine Bigelow, my advisor and viola professor, desired that the catalog include the date, author, and a short summary of every letter. This required me to read every letter, many handwritten and multiple pages. My goal was to catalog all 5,000 letters, but after 9 months and over 300 hours of working on the project I had read about 2,000 letters, or four out of the ten boxes. Two others students have since been hired by the library to finish the project over the course of this summer
Primula incana (Mealy Primrose) : Mealy Primrose
No full textClass: Dicotyledoneae
Family: Primulaceae
Genus: Primula
Species: incan
Population growth and unemployment in South Africa: A 24-Year analysis
No full textThis study explores the nexus between population growth and unemployment in South Africa from 2000 to 2023, a period marked by significant demographic changes and economic challenges. South Africa has experienced rising unemployment alongside rapid population growth, which has led to concerns about the country’s ability to absorb its expanding labour force. The aim of this research is to examine how population growth influences unemployment, considering additional factors like foreign direct investment (FDI), gross domestic product (GDP), and inflation. Using time series data from the World Bank, Statistics South Africa, and the South African Reserve Bank, the study employs the Augmented Dickey-Fuller unit root test for stationarity, Johansen cointegration for long-term relationships, and Ordinary Least Squares (OLS) regression to estimate the impact of population growth on unemployment. Key findings indicate that population growth has a positive and statistically significant relationship with unemployment, meaning higher population growth increases unemployment levels. Foreign direct investment also shows a positive effect on unemployment, while GDP and inflation exhibit negative but statistically insignificant relationships. Based on these findings, the study recommends strategic urban planning, family planning initiatives, and targeted policies to attract labour-intensive FDI. Additionally, the government should focus on economic diversification, supporting SMEs, and investing in skill development to create sustainable jobs. This research contributes to understanding the dynamics between population growth and unemployment in South Africa and offers insights for more effective policy interventions
Matrix and pH effects on the degradation kinetics of xanthates in mining waters
No full textDetermination of optimal pH conditions for a xanthate solution representative of a real matrix in an industrial setting (such as a flotation tank or a tailings pond) was researched to help ensure mill efficiency in mines. The primary method for analysis was the use of headspace GC-MS. Aqueous samples of xanthates in basic solutions without minerals were tested for degradation by testing for the generation of carbon disulfide (CS2). Potassium isopropyl xanthate (PIPX) and potassium amyl xanthate (PAX) were primarily studied and rate constants were compared to determine optimal pH conditions for the slowest degradation of individual xanthates. The rate constant for 110.6 ppm PIPX was found to be 5.79 x 10-5 h-1 at pH 7.73; at the same pH, the rate constant was found to be 3.91 x 10-6 h-1 for 1075.2 ppm. The rate constant for PAX was found to be 5.43 x 10-5 h-1 at pH 9.08, 1.23 x 10-5 h-1 at pH 9.26, 8.12 x 10-6 h 1 at pH 9.34, and 4.36 x 10-5 h-1 at pH 9.48.Supervisor Dr. Kingsley DonkorXanthateDecompositionRateCarbon disulfideGas chromatography-mass spectrometr
The Effect of a Mixed Extract of Peppermint, Mentha, Evening Primrose, and Eucalyptus on Lowering Body Temperature in Rats
No full textBackground and Aim: Increased body temperature (fever) is a common clinical indicator of disease and can lead to altered metabolism and subsequently threaten life. studies have shown antimicrobial, analgesic/antipyretic effect for some Eucalyptus and Mentha species. Therefore, in the present study we assessed the effect of the combination of mint (Mentha), eucalyptus, evening primrose, and basil on lowering body temperature.Methods: This experimental study was performed on 30 rats in five groups. A hydroalcoholic extract was prepared from each plants using ethanol as solvent and concentrated with a rotary apparatus. Then the extracts were combined in equal proportions. To induce fever, the brewer's yeast fever induction method was used by intraperitoneal injection of a 20% aqueous suspension. The febrile rats were then divided into groups receiving different doses of the mixed extract (200, 500, 750 mg/kg); normal saline and paracetamol were used in control groups. Rectal temperature was measured with a digital thermometer before injection and 6, 8, 12, and 16 hours after extract injection. The analysis of variance with repeated measurements was used to evaluate the effect of hydroalcoholic plant extracts on fever changes.Results: The mean fever in the intervention groups with all effective doses decreased over the hours, and the mean fever with a dose of 750 mg decreased more than in the other groups (P-value < 0.05). We had the lowest fever at a dose of 750 mg and a time of 16 hours (P-value < 0.05).Conclusion: The results show that the combined extract can reduce body temperature in rats, and by increasing the effective dose, the recovery rate and temperature reduction are faster and more effective.
*Corresponding Author: Roghayeh Gholizadeh Doran Mahalleh; Email:[email protected]; ORCID ID: 0000-0002-4756-7122
Please cite this article as: Gholizadeh Doran Mahalleh R, Abdollahi Gonbaj A, Razavi M. The Effect of a mixed extract of Peppermint, Mentha, Evening Primrose, and Eucalyptus on Lowering Body Temperature in Rats. Arch Med Lab Sci. 2022;8:1-6 (e7). https://doi.org/10.22037/amls.v8.3654
Evaluating the impact of foreign direct investment on economic growth in developing economies: Evidence from South Africa (2000–2023)
No full textThis study examines the impact of Foreign Direct Investment (FDI) on economic growth in South Africa over the period 2000 to 2023. An Ordinary Least Squares (OLS) regression model was employed to assess the relationship between FDI inflows and Gross Domestic Product (GDP), while controlling for key macroeconomic variables. The findings reveal that FDI exerts a significant positive influence on economic performance, with a 1% increase in FDI inflows associated with a 1.93% rise in GDP. However, high inflation exerts a detrimental effect, with a coefficient of -1.99, highlighting the importance of macroeconomic stability. The analysis also indicates that trade openness contributes positively to economic growth, while political risk remains a substantial deterrent to investment, as shown by a coefficient of -3.11. These findings underline the importance of maintaining a stable political environment, managing inflation effectively, and enhancing trade liberalisation to maximise the benefits of FDI. Policy recommendations include strengthening regulatory frameworks and fostering trade openness
Lipase-catalysed enrichment of γ-linolenic acid from evening primrose oil in a solvent-free system
No full textThe enrichment of γ-linolenic acid (GLA) was carried out in a solvent-free system by lipase-catalysed esterification of free fatty acids from evening primrose oil (EPO-FA) and 1-butanol (BtOH). The lipase employed to conduct this study was a free preparation of Candida rugosa. Variables evaluated were: substrate molar ratio (1:4, 1:6, 1:8, 1:10 and 1:12, EPO-FA:BtOH), temperature (10, 20, 30, 40, 50 and 60 °C), and enzyme loading (5, 10, 15 and 20 %, based on the total weight of substrates). GLA was highly enriched in the non-esterified fatty acid fraction since C. rugosa showed very low selectivity for this fatty acid. We were able to increase the content of GLA to ca. 70 wt.% under the following optimal conditions: 30 °C, 10 % enzyme loading and a 1:10 molar ratio (EPO-FA:BtOH), after 24 h. An additional set of experiments was conducted whereby the amount of water was controlled by addition of molecular sieves to the reaction mixture. The latter experiments produced a higher GLA concentrate (83.74 wt.%), under the optimal conditions described above and by adding 10 % molecular sieves (based on the total weight of substrates) after 36 h.This research was supported by the Rural Development Administration (Korea, project number PJ009247) and CSIC (Spain) for the JAE pre‐doctoral fellowship to author Baeza.Peer Reviewe
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