liu.seSearch for publications in DiVA
Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 50) Show all publications
du Preez, M., Govender, D., Kylin, H. & Bouwman, H. (2018). Metallic elements in Nile Crocodile eggs from the Kruger National Park, South Africa. Ecotoxicology and Environmental Safety, 148, 930-941.
Open this publication in new window or tab >>Metallic elements in Nile Crocodile eggs from the Kruger National Park, South Africa
2018 (English)In: Ecotoxicology and Environmental Safety, ISSN 0147-6513, E-ISSN 1090-2414, Vol. 148, 930-941 p.Article in journal (Refereed) Published
Abstract [en]

The Nile Crocodile is the largest predator on the African continent. Recent mass mortalities in the Kruger National Park (KNP) raised concerns about possible influence of pollution. We analysed eggs and their eggshells collected from nests inside the KNP and from a crocodile farm for metallic elements. We found that mercury, selenium, and copper occurred at levels of concern. Eggshells had very high concentrations of iron. Apart from toxicological implications associated with elevated concentrations in eggs, we found iron possibly contributing towards thicker eggshells. Thicker shells may act as a barrier to gas and water exchange, as well as possibly increasing the effort required for the hatchling to emerge from tightly packed shells under sand. Pollutants are transported into the KNP via rivers, and possibly via air. Mercury and copper pollution are waste-, industrial- and mining-related; ecotoxicological concern should therefore be extended to all areas where the four African crocodile species occur. Reptiles are under-represented in ecotoxicological literature in general, and especially from Africa. We know of only one previous report on metals and metalloids in crocodile eggs from Africa (Zimbabwe), published 30 years ago. Reduced fitness, endocrine disruption and effects on behaviour are other possible sub-lethal effects associated with metallic elements that may only become apparent decades later in a long-lived species such as the Nile Crocodile. In the face of habitat destruction, pollution, human population increases, and climate change, further research is needed regarding pollutant concentrations and effects in all African reptiles . The rivers that carry water from outside the park sustain its aquatic life, but also transport pollutants into the KNP. Therefore, improved source mitigation remains an important task and responsibility for all involved.

Place, publisher, year, edition, pages
Academic Press, 2018
Keyword
Ecotoxicology, aquatic ecology, reptile, eggshell, mercury, selenium, copper
National Category
Ecology Other Veterinary Science Environmental Sciences Oceanography, Hydrology and Water Resources
Identifiers
urn:nbn:se:liu:diva-143816 (URN)10.1016/j.ecoenv.2017.11.032 (DOI)2-s2.0-85036659815 (Scopus ID)
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2018-01-18Bibliographically approved
Shoeb, M., Mondal, P., Kylin, H. & Nahar, N. (2017). Chemical and biological activity of mushrooms naturally occurring in Bangladesh. Asian Journal of Pharmacognosy, 1(3), 42-51.
Open this publication in new window or tab >>Chemical and biological activity of mushrooms naturally occurring in Bangladesh
2017 (English)In: Asian Journal of Pharmacognosy, E-ISSN 0128-1119, Vol. 1, no 3, 42-51 p.Article in journal (Refereed) Published
Abstract [en]

Five freeze-dried mushroom species namely Agaricus bisporus, Coprinus micaceus, Pleurotus ostreatus, Termitomyces clypeatus and T. heimii were extracted separately with dichloromethane:methanol followed by partitioned using hexane, dichloromethane and methanol. Silica gel column chromatography of hexane extract of T. heimii and dichloromethane extract of P. ostreatus afforded 2,4-di-hydroxy-9-octadecenoic acid and 2-hydroxy-9-octadecenoic acid, respectively. The n-hexane extracts of mushrooms were analyzed for the presence of n-alkanes and fatty acid compositions. n-Alkanes were found in T. heimii only. Different extracts of mushrooms were evaluated for antimicrobial activity against a wide range of Gram-positive and Gram-negative bacteria and fungi, general toxicity and antioxidant activity.

Place, publisher, year, edition, pages
Asian Society of Pharmacognosy, 2017
Keyword
Agaricus, Coprinus, Pleurotus, Termitomyces, natural products from mushrooms, traditional medicine
National Category
Pharmacology and Toxicology Other Medical Sciences not elsewhere specified Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:liu:diva-138007 (URN)
Available from: 2017-06-05 Created: 2017-06-05 Last updated: 2018-01-13Bibliographically approved
Kylin, H. (2017). Det var allmänt känt att lämlarna förr från himlen. Universitetsläraren (3), 48.
Open this publication in new window or tab >>Det var allmänt känt att lämlarna förr från himlen
2017 (Swedish)In: Universitetsläraren, no 3, 48- p.Article in journal (Other (popular science, discussion, etc.)) Published
Keyword
Interkulturell kommunikation
National Category
Social Sciences Interdisciplinary Ecology History of Ideas
Identifiers
urn:nbn:se:liu:diva-136905 (URN)
Note

Krönika

Available from: 2017-04-28 Created: 2017-04-28 Last updated: 2018-01-13Bibliographically approved
Cotgreave, I., Ghavanini, A. A., Alfaro-Moreno, E., Bergman, Å., Cederbrant, K., Forsby, A., . . . Knudsen, L. (2016). Pyriproxifen and microcephaly: an investigation of potential ties to the ongoing "Zika epidemic". Södertälje: Swetox.
Open this publication in new window or tab >>Pyriproxifen and microcephaly: an investigation of potential ties to the ongoing "Zika epidemic"
Show others...
2016 (English)Report (Other academic)
Abstract [en]

As part of the Swetox mission to react to emerging concerns in chemical health and environmental safety, a preliminary litterature investigation was undertaken to gather all readily available scientific information on PPF with respect to safety assessment, in order to better understand potential links between chemical exposure and the devopment of microcephaly in affected areas. Therefore the contents of the report do not constitute an attempt at either questioning the use of existing regulatory data in the manner prescribed by international regulatory proceedures, or as a new risk assessment, based on the scientific information and concepts discussed. Here we report our findings, with particular emphasis on exisiting regulatory information, potential for lack of translation of results from regulatory animal testing to humans, lack of human exposure data and suggestions on plausible mode(s) of action of PPF in human neurodevelopmental adversities such as microcephaly.

Place, publisher, year, edition, pages
Södertälje: Swetox, 2016. 15 p.
Keyword
Mikrocefali, zikavirus, pyriproxifen
National Category
Occupational Health and Environmental Health
Identifiers
urn:nbn:se:liu:diva-126096 (URN)
Available from: 2016-03-14 Created: 2016-03-14 Last updated: 2018-01-10Bibliographically approved
Bouwman, H., Evans, S., Cole, N., Choong Kwer Yive, N. S. & Kylin, H. (2016). The flip-or-flop boutique: Marine debris on the shores of St Brandon’s Rock, an isolated tropical atoll in the Indian Ocean. Marine Environmental Research, 114, 58-64.
Open this publication in new window or tab >>The flip-or-flop boutique: Marine debris on the shores of St Brandon’s Rock, an isolated tropical atoll in the Indian Ocean
Show others...
2016 (English)In: Marine Environmental Research, ISSN 0141-1136, E-ISSN 1879-0291, Vol. 114, 58-64 p.Article in journal (Refereed) Published
Abstract [en]

Isolated coral atolls are not immune from marine debris accumulation. We identified Southeast Asia, the Indian sub-continent, and the countries on the Arabian Sea as most probable source areas of 50 000 items on the shores of St. Brandon’s Rock (SBR), Indian Ocean. 79% of the debris was plastics. Flip-flops, energy drink bottles, and compact fluorescent lights (CFLs) were notable item types. The density of debris (0.74 m-1 shore length) is comparable to similar islands but less than mainland sites. Intact CFLs suggests product-facilitated long-range transport of mercury. We suspect that aggregated marine debris, scavenged by the islands from currents and gyres, could re-concentrate pollutants. SBR islets accumulated debris types in different proportions suggesting that many factors act variably on different debris types. Regular cleaning of selected islets will take care of most of the accumulated debris and may improve the ecology and tourism potential. However, arrangements and logistics require more study.

Keyword
Plastic, Polyurethane foam, Mercury, Management, Wreck, Compact fluorescent light
National Category
Environmental Sciences Oceanography, Hydrology and Water Resources Other Earth and Related Environmental Sciences Other Chemistry Topics
Identifiers
urn:nbn:se:liu:diva-123712 (URN)10.1016/j.marenvres.2015.12.013 (DOI)000370095600007 ()
Note

Funding agencies: South African Regional Cooperation Fund for Scientific Research and Technological Development [65290]

Available from: 2016-01-10 Created: 2016-01-10 Last updated: 2018-01-10Bibliographically approved
Kylin, H. (2016). The Missing Skull – Professor Lundborg and the Mismeasure of Grandma. Endeavour, 40(2), 131-134.
Open this publication in new window or tab >>The Missing Skull – Professor Lundborg and the Mismeasure of Grandma
2016 (English)In: Endeavour, ISSN 0160-9327, E-ISSN 1873-1929, Vol. 40, no 2, 131-134 p.Article in journal (Refereed) Published
Abstract [en]

What is science? Or, more pertinently, what is good science? This question is central for all practitioners of science and one of the most important to convey to our students. For those of us working in interdisciplinary settings – my own department covers everything from humanities to political and natural science – the question becomes even more complicated when traditions from different disciplines collide. For me personally, whenever I think too highly of my own research and risk deviating into bad scientific practices, I think of my paternal grandmother, Elsa. Although long dead, she brings me back into the fold of good science – or so I hope – by urging me to take another turn at critically evaluating how I perform research and to keep my arrogance in check.

Place, publisher, year, edition, pages
Elsevier, 2016
Keyword
Racial biology, Swedish State Institute for Racial Biology, racial hygene, eugenics, Rasbiologi, Statens institute for rasbiologi, rashygien, eugenic, tvångssterilisering
National Category
History of Ideas
Identifiers
urn:nbn:se:liu:diva-125932 (URN)10.1016/j.endeavour.2016.03.001 (DOI)000378953800008 ()
Available from: 2016-03-09 Created: 2016-03-09 Last updated: 2017-11-30Bibliographically approved
Jantunen, L., Wong, F., Gawor, A., Kylin, H., Helm, P., Stern, G., . . . Bidleman, T. (2015). 20 Years of Air-Water Gas Exchange Observations for Pesticides in the Western Arctic Ocean. Environmental Science and Technology, 49(23), 13844-13852.
Open this publication in new window or tab >>20 Years of Air-Water Gas Exchange Observations for Pesticides in the Western Arctic Ocean
Show others...
2015 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 49, no 23, 13844-13852 p.Article in journal (Refereed) Published
Abstract [en]

The Arctic has been contaminated by legacy organochlorine pesticides (OCPs) and currently used pesticides (CUPs) through atmospheric transport and oceanic currents. Here we report the time trends and air−water exchange of OCPs and CUPs from research expeditions conducted between 1993 and 2013. Compounds determined in both air and water were trans- and cis-chlordanes (TC, CC), trans- and cis-nonachlors (TN, CN), heptachlor exo-epoxide (HEPX), dieldrin (DIEL), chlorobornanes (ΣCHBs and toxaphene), dacthal (DAC), endosulfans and metabolite endosulfan sulfate (ENDO-I, ENDO-II, and ENDO SUL), chlorothalonil (CHT), chlorpyrifos (CPF), and trifluralin (TFN). Pentachloronitrobenzene (PCNB and quintozene) and its soil metabolite pentachlorothianisole (PCTA) were also found in air. Concentrations of most OCPs declined in surface water, whereas some CUPs increased (ENDO-I, CHT, and TFN) or showed no significant change (CPF and DAC), and most compounds declined in air. Chlordane compound fractions TC/(TC + CC) and TC/(TC + CC + TN) decreased in water and air, while CC/(TC + CC + TN) increased. TN/(TC + CC + TN) also increased in air and slightly, but not significantly, in water. These changes suggest selective removal of more labile TC and/or a shift in chlordane sources. Water−air fugacity ratios indicated net volatilization (FR > 1.0) or near equilibrium (FR not significantly different from 1.0) for most OCPs but net deposition (FR < 1.0) for ΣCHBs. Net deposition was shown for ENDO-I on all expeditions, while the net exchange direction of other CUPs varied. Understanding the processes and current state of air−surface exchange helps to interpret environmental exposure and evaluate the effectiveness of international protocols and provides insights for the environmental fate of new and emerging chemicals.

Keyword
Organochlorine pesticides, currently used pesticides, long-range transport, global processes
National Category
Oceanography, Hydrology and Water Resources Water Engineering
Identifiers
urn:nbn:se:liu:diva-122986 (URN)10.1021/acs.est.5b01303 (DOI)000365930500015 ()26196214 (PubMedID)
Note

Funding agencies: Environment Canada; Arctic Net; Northern Contaminants Program (Aboriginal Affairs and Northern Development Canada); Centre for Global Science, University of Toronto; Northern Science Training Program, Aboriginal Affairs and Northern Development Canada;

Available from: 2015-12-01 Created: 2015-12-01 Last updated: 2018-01-10
Bouwman, H., Kylin, H. & Bornman, R. (2015). Is Indoor Residual Spraying broken and what should be fixed?. In: Proceedings of the 7th International Toxicology Symposium in Africa: . Paper presented at 7th International Toxicology Symposium in Africa (pp. 2-3). .
Open this publication in new window or tab >>Is Indoor Residual Spraying broken and what should be fixed?
2015 (English)In: Proceedings of the 7th International Toxicology Symposium in Africa, 2015, 2-3 p.Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Indoor residual spraying (IRS) has been and is still a very successful method to controlmalaria. We are concerned that not enough research attention is given to improvingIRS and that most funding goes towards modern but seemingly still ineffectualmethods. We believe that there is ample scope for improving IRS, while reducinginsecticide exposure

Keyword
Indoor residual spraying, IRS, Botha de Meillon, malaria control policy
National Category
Occupational Health and Environmental Health Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:liu:diva-122572 (URN)978-0-620-66117-7 (ISBN)978-0-620-66287-1 (ISBN)
Conference
7th International Toxicology Symposium in Africa
Available from: 2015-11-09 Created: 2015-11-09 Last updated: 2018-01-10Bibliographically approved
Abongo, D. A., Wandiga, S. O., Jumba, I. O., Van den Brink, P. J., Naziriwo, B. B., Madadi, V. O., . . . Kylin, H. (2015). Occurrence, abundance and distribution of benthic macroinvertebrates in the Nyando River catchment, Kenya. African Journal of Aquatic Science, 40(4), 373-392.
Open this publication in new window or tab >>Occurrence, abundance and distribution of benthic macroinvertebrates in the Nyando River catchment, Kenya
Show others...
2015 (English)In: African Journal of Aquatic Science, ISSN 1608-5914, E-ISSN 1727-9364, Vol. 40, no 4, 373-392 p.Article in journal (Refereed) Published
Abstract [en]

A baseline study was conducted of the occurrence of macroinvertebrates at 26 sites in the Nyando River catchment in 2005-2006. A total of 13 orders and 16 families of Arthropoda, Mollusca, Platyhelminthes and Annelida were collected, with the order Ephemeroptera being most abundant in the up- and mid-stream reaches, followed by Hemiptera and Plecoptera respectively. The downstream sections of the river were dominated by Hirudinea and tubificids, as the water quality deteriorated mainly due to local land use, raw sewage effluent discharge and annual floods. Insects and annelids were the main invertebrates found and the extent of pollution increased from mid-section (Site 15) downwards as the river flowed into the Winam Gulf. Stringent management measures are required to safeguard the environment and ecosystems of Lake Victoria.

Place, publisher, year, edition, pages
NATL INQUIRY SERVICES CENTRE PTY LTD, 2015
Keyword
biodiversity index; environmental monitoring; Lake Victoria Basin; species distribution; water quality; Winam Gulf
National Category
Earth and Related Environmental Sciences
Identifiers
urn:nbn:se:liu:diva-123840 (URN)10.2989/16085914.2015.1113397 (DOI)000366834400004 ()
Note

Funding Agencies|International Foundation for Science (IFS) [W3982-1]; Higher Education Loans Board (HELB), Kenya

Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2017-12-01
Abong'o, D., Wandiga, S., Jumba, I., van den Brink, P., Nazariwo, B., Madadi, V., . . . Nkedi-Kizza, P. (2015). Organochlorine pesticide residue levels in soil from the Nyando River catchment, Kenya. Africa Journal of Physical Sciences, 2(1), 18-32.
Open this publication in new window or tab >>Organochlorine pesticide residue levels in soil from the Nyando River catchment, Kenya
Show others...
2015 (English)In: Africa Journal of Physical Sciences, ISSN 2313-3317, Vol. 2, no 1, 18-32 p.Article in journal (Refereed) Published
Abstract [en]

Soil samples were collected from six locations representative of the Nyando River catchment area of the Lake Victoria over a period of two years. Sampling was done four times in the year in February, May, September and December 2005 and 2006 in farms where maize, tea, sugar cane, coffee, rice and vegetables have been grown over the years. This coincided with the effects of different seasons and farming activities on residue levels of the pesticides in use. The objective was to investigate levels and distribution of organochlorine pesticides that have either been banned or are restricted for use in Kenya. Organochlorine pesticides investigated were DDT, lindane, aldrin, dieldrin, heptachlor, endrin, endosulfan (both α- and β- isomers and endosulfan sulphate), the sum is called “total” or Σendosulfan and methoxychlor. Prior to the ban or restriction in use, these pesticides had found wide applications in public health for control of disease vectors and in agriculture for control of crop pests. The analysis revealed presence of all the targeted pesticides with the highest mean concentrations for methoxychlor 140 ± 1.5 μg/kg, Σendosulfan (30 ± 2.1 μg/kg), aldrin (18 ± 0.28 μg/kg), respectively. The results show the presence of these pesticides in soils in the basin and this could be impacting negatively on the ecosystem health of the area.

Keyword
Pesticides, Lake Victoria, water quality, Africa, soil quality, farming
National Category
Environmental Sciences Geochemistry Oceanography, Hydrology and Water Resources
Identifiers
urn:nbn:se:liu:diva-120601 (URN)
Available from: 2015-08-18 Created: 2015-08-18 Last updated: 2018-01-11Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5972-1852

Search in DiVA

Show all publications