-
-
Kjøniksen, Anna-Lena
(2023).
Abels Tårn.
[Radio].
NRK Radio.
-
Kjøniksen, Anna-Lena
(2023).
Abels Tårn.
[Radio].
NRK Radio.
-
Tellnes, Lars Gunnar Furelid; Kjøniksen, Anna-Lena & Pamies, Ramon Francisco Porras
(2023).
Life cycle assessment of tunicate burger.
-
Tellnes, Lars Gunnar Furelid; Pamies, Ramon Francisco Porras; Kjøniksen, Anna-Lena & Næss, Johann K
(2023).
Declaring environmental performance with reuse and recycling business approaches for small and medium sized enterprises.
-
Tellnes, Lars Gunnar Furelid; Koch, Christian; Torgersen, Mirielle & Kjøniksen, Anna-Lena
(2023).
Value capture from low embodied emissions of buildings a business model innovation perspective.
-
Tellnes, Lars Gunnar Furelid & Kjøniksen, Anna-Lena
(2023).
Metrics for absolute environmentally sustainable foods – case on tunicate burger.
-
Tellnes, Lars Gunnar Furelid; Wu, Hong & Kjøniksen, Anna-Lena
(2023).
LCA for circular business model – five step method and experiences from Norway.
-
Tellnes, Lars Gunnar Furelid; Andersson, Gunnar & Kjøniksen, Anna-Lena
(2023).
Three perspectives of LCA for business models innovation – case studies on rental of products.
-
Tellnes, Lars G. F.; Næss, Johann Kristian; Kjøniksen, Anna-Lena & Ross, Lone
(2023).
Carbon footprint of reused and recycled wood products.
-
Tellnes, Lars Gunnar Furelid & Kjøniksen, Anna-Lena
(2022).
Perspectives of evaluating product service systems with life cycle assessment a case study on power tool rental.
-
Kjøniksen, Anna-Lena & Tellnes, Lars Gunnar Furelid
(2022).
Action case studies as method for industrial work integrated learning.
-
-
Pilehvar, Shima & Kjøniksen, Anna-Lena
(2020).
Recent research into urea as a plasticizer for concrete on the Moon. Double Helix magazine.
-
-
Kjøniksen, Anna-Lena
(2020).
Månedrømmen.
[TV].
Lørdagsevyen, NRK.
-
-
-
-
Kjøniksen, Anna-Lena & Pilehvar, Shima
(2020).
Urin als Baustoff für den Mond.
[Business/trade/industry journal].
MIT Technology Review science magazine's German edition.
-
-
-
-
-
-
-
-
-
-
Pilehvar, Shima & Kjøniksen, Anna-Lena
(2020).
Basalt fiber reinforced geopolymer for construction on the Moon .
-
-
-
Kjøniksen, Anna-Lena; Pilehvar, Shima; Valentini, Luca; Arnhof, Marlies & Pamies, Ramon Francisco Porras
(2020).
Geopolymers from Lunar Regolith for Building on the Moon.
-
-
Pilehvar, Shima & Kjøniksen, Anna-Lena
(2019).
Forsker på Månebetong.
[TV].
NRK Distrikstnyheter Østfold.
-
-
Kjøniksen, Anna-Lena; Pilehvar, Shima & Arnhof, Marlies
(2019).
Building a Base on the Moon? New Research in Regolith Concrete.
-
Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Cao, Vinh Duy; Pilehvar, Shima; G. Sanfèlix, Susana & Szczotok-Piechaczek, Anna Maria
(2019).
Advanced Materials - From drug delivery by energy technology to 3D-printing concrete on the Moon.
-
Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; G. Sanfèlix, Susana ; Pilehvar, Shima; Szczotok-Piechaczek, Anna Maria & Cao, Vinh Duy
(2019).
Advanced Materials - From drug delivery by energy technology to 3D-printing concrete on the Moon.
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2019).
Science Camp i Hessdalen.
[Internet].
NEARADIO.
Show summary
I femten år har studenter fra Høgskolen i Østfold inntatt Hessdalsfjellene. I helga avsluttet de sin to ukers lange høsttur, og for første gang ble den nye basestasjonen på Skarven tatt i bruk.
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2019).
Atmospheric electricity in Hessdalen valley, Norway.
Show summary
At fair weather conditions, atmospheric electricity of interesting magnitudes has been observed in Hessdalen, Norway. In this area, transient luminous phenomena have been observed in the low atmosphere for several decades. Light balls of different shapes and color, with a life time from seconds up to two hours have been reported. Electrical field mills have been utilized to measure the static electrical field in the low atmosphere at two mountain tops, Skarvan at an altitude of 975 m and Finså at 1040 m. These mountains are spaced 5.5 km apart along a north-south axis. Data from September 2017 show a buildup of static charge of more than 15kV/m under fair weather conditions while the voltage difference between the
two mountain tops exceed 20kV/m. In this area, NGU, the national institution for the study of bedrock, mineral resources, surficial deposits and groundwater, warns for high levels of Radon. Data from September 2017 shows that the radioactivity at Finså mountain increases when the electric field decrease to -5kV/m, while radioactivity levels at Skarvan stays unchanged at low level despite of the increase to over 15kV/m. Just before, at 23:44, a light is seen from Finså towards south which lasts for 8 minutes. The light emerges in a desolated area and gives a continuous optical spectrum, making it a possible observation of the Hessdalen phenomena. Observation area is marked yellow in the map.
-
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2019).
Dette testhuset skal løse lysmysteriet.
[Business/trade/industry journal].
Teknisk ukeblad.
-
-
-
-
-
-
-
-
-
Santacruz, Isabel; Romero-Espinosa, A.; G. Sanfèlix, Susana ; Cuesta, A; De la Torre, Ángeles G. & Kjøniksen, Anna-Lena
[Show all 7 contributors for this article]
(2018).
Processing and characterisation of calcium sulphoaluminate ecocements containing Microencapsulated Phase Change Materials.
-
-
-
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2018).
Mystisk lys øker forståelse for realfag.
[Internet].
HiØ nettsider.
Show summary
https://blogg.hiof.no/hva-skjer-a/
-
Szczotok-Piechaczek, Anna Maria; Serrano, A.; Carmona, Manuel; Kjøniksen, Anna-Lena & Rodriguez, Juan F.
(2017).
Development of thermoregulating microcapsules having flame retardant properties for building applications.
-
-
-
Pilehvar, Shima; Kjøniksen, Anna-Lena; Szczotok, Anna M. & Pamies, Ramon Francisco Porras
(2017).
The Effect of Micro-encapsulated Phase Change Materials on the Properties of Geopolymer and Portland Cement Concrete
.
-
Szczotok-Piechaczek, Anna Maria; Kjøniksen, Anna-Lena; Carmona, Manuel & Rodriguez, Juan F.
(2017).
Development of thermoregulating microcapsules with cyclotriphosphazene as a flame retardant agent.
-
G. Sanfèlix, Susana ; Santacruz, Isabel; Szczotok-Piechaczek, Anna Maria; Ordonez, Luis M.; G. De la Torre, Angeles & Kjøniksen, Anna-Lena
(2017).
Rheological performance of cement composites with Microencapsulated Phase Change Materials
.
-
Cao, Vinh Duy; Pilehvar, Shima; Carlos, Salas Bringas; M. Szczotok, Anna & Kjøniksen, Anna-Lena
(2017).
The Effect of Microcapsulated Phase Change Materials on Thermal and Mechanical properties of Geopolymer Concrete.
Show summary
The energy consumption for heating and cooling of buildings increases every year. Improved t material technology can help reducing the energy consumption needed to keep a comfortable indoor temperature. By integrating microencapsulated phase change materials (MPCM), which has a very high energy storage capacity within the phase transition temperature, the energy storage capacity of concrete can be significantly improved. This will facilitate improved passive building technology with reduced the energy consumption.
Geopolymer concrete (GPC) is synthesized by alkali activation of aluminosilicate materials in amorphous form (industrial waste). Geopolymer concrete is much more environmentally friendly than Portland cement concrete, which has a negative effect on the environment due to emission of huge amounts of CO2. Therefore, the integration of MPCM to GPC provides a promising environmentally friendly material with a high energy storage capacity. However, knowledge regarding the effect of MPCM on the thermal and mechanical properties of geopolymer concrete is very limited.
In this study, high thermal energy storage capacity materials were fabricated by mixing MPCM into geopolymer concrete (GPC). The effect of different type and concentration of MPCM on improving the thermal properties of GPC has been examined. Furthermore, the negative effect on the compressive strength of geopolymer concrete received special attention. Optimizing the effect of MPCM on geopolymer concrete to improve thermal properties and maintain the compressive strength of the geopolymer concrete at an acceptable level for building application is the main target of this study.
-
Cao, Vinh Duy; Pilehvar, Shima; Salas-Bringas, Carlos; M. Szczotok, Anna & Kjøniksen, Anna-Lena
(2017).
Smart Geopolymer Concrete Containing Microencapsulated Phase Change Materials for Passive Building Applications.
-
Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter
(2017).
Optical luminosity of the transient luminous phenomena in Hessdalen, Norway.
Show summary
Transient luminous phenomena has been observed in the low atmosphere over Hessdalen valley for several decades, first report is claimed to be 200 years old. The area is scattered with old copper, zinc, sulphur and iron mines. The river Hesja divides the valley, running south to north. The river descends from 800 m altitude to 600m. In the middle of the valley, an old copper and sulphur mine feeds the river with its acidic sulphur pollution. Eyewitnesses have reported lights emerging from the river, but most reports are of lights suddenly emerging in low altitudes over the valley, 1000m – 2000m altitude. Common colours are white, yellow, orange and blue. Green is absent. The optical spectrum of the white lights has been obtained several times, indicating a continuous spectrum. The luminosity of the Hessdalen lights has been debated, some speculating that the phenomenon´s radiant power reaches up to 1MW. A more moderate calculation done by Teodorani in 2004 suggests 19KW. The cause of the huge difference is du to uncertainty in establishing correct distance to the phenomenon. Recent discoveries done by this team, indicates that the radiant power is usually much lower. For the first time in Hessdalen, pictures with optical spectrums was obtained at a distance not more than 300m. Two similar observations were done from the same position, indicating a possible birthplace. Atmospheric data and spectrum analysis was also coinciding. Data from this short distance observation will be presented.
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2017).
Development of a Horizon 2020 FET project.
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2017).
Development of a Horizon 2020 FET project.
-
Gjengedal, Kjerstin; Underhaug, Jarl; Magnus, Per; Kvalheim, Vigdis & Kjøniksen, Anna-Lena
(2016).
Utstyret i orden.
[Business/trade/industry journal].
Forskerforum.
-
Kjøniksen, Anna-Lena
(2016).
Vinn eller forsvinn.
[Business/trade/industry journal].
Forskerforum.
-
Kjøniksen, Anna-Lena
(2016).
Faseovergangsmaterialer i Betong.
-
Szczotok, Anna; Carmona, Manuel; Rodriguez, Juan F. & Kjøniksen, Anna-Lena
(2016).
Using fatty acids for money and energy savings.
-
Szczotok, Anna; Carmona, Manuel; Rodriguez, Juan F. & Kjøniksen, Anna-Lena
(2016).
The effect of suspending agent type on thermal and physical properties of thermoregulating microcapsules.
-
Pilehvar, Shima & Kjøniksen, Anna-Lena
(2016).
The mechanical behavior of geopolymer and Portland cement concrete with micro-encapsulated PCM.
-
Szczotok, Anna; Carmona, Manuel; Rodriguez, Juan & Kjøniksen, Anna-Lena
(2016).
Using fatty acids for developing thermal energy storage materials.
-
Pilehvar, Shima & Kjøniksen, Anna-Lena
(2016).
The Effect of Micro-encapsulated Phase Change Materials in Liquid State on Properties of Geopolymer and Portland Cement Concrete.
-
Kjøniksen, Anna-Lena
(2016).
Micro-encapsulated phase change materials in concrete.
-
G. Sanfèlix, Susana ; De la Torre, Ángeles G. & Kjøniksen, Anna-Lena
(2016).
Low CO2 binders with Micro-Encapsulated Phase Change Materials.
-
Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter
(2016).
Hessdalen blir bachelorstudie.
[Internet].
NEA Radio.
Show summary
Høyskolen i Østfold HiØ tilbyr fra neste høst et studie i feltforskning, der deler av opplegget er lagt til Hessdalen.
Studiet er valgfag i alle bachelorstudier i ingeniørfag, og i innovasjon og prosjektledelse.
Allerede denne høsten vil den årlige Science Campen i Hessdale fungere som et teststudie for de norske og svenske elevene som deltar. Årets Science Camp foregår fra 5. – 16- september.
-
Hauge, Bjørn Gitle; Strand, Erling Petter & Kjøniksen, Anna-Lena
(2016).
Vil bygge forskningsstasjon i Hessdalen.
[Internet].
NEA Radio.
Show summary
Hessdalen bærekraftige forskningsstasjon søker det interkommunale næringsfondet om midler til etablering av en forskningsstasjon på fjellet i Hessdalen.
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2016).
Hessdalsfenomenet.
[TV].
NRK Distriktsnyheter Midtnytt .
Show summary
Hessdalsfenomenet bekreftes av forskere under Science Camp 2016
-
Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena; Strand, Erling Petter; Vargemezis, George & Zlotnicki, Jacques
(2016).
Magnetic influence on the unidentified luminous phenomena in Hessdalen, Norway.
Show summary
Unidentified luminous phenomena have been observed in the low atmosphere over the Hessdalen valley for decades. First scientific investigation was done by E.Strand in 1984, where spiral movements of lights was recorded. The Science Camp program has conducted yearly field investigations since 2002 and has confirmed the existence of this spiral-behavior. (http://sciencecamp.no) Such behavior has also been documented in Alabama, USA. In September 2015 spiral like movement of lights was observed together
with the more common spherical lights. This spiral movement indicates the presence of low atmospheric charged matter, moving in a magnetic field. A geological survey in 2014 reviled the presence of strong magnetic anomalies. The valley contains several abandoned copper mines containing Chalcopyrite and Magnetite. The Magnetite was not useful in the copper production, and left in heaps around the valley unused. This may contribute to the magnetic anomalies in the valley.
-
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2016).
New data from the Hessdalen field research in september 2016.
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2016).
Looking into the Hessdalen lights phenomenon, and read about your fascinating experiment showing that the phenomenon could have been caused by a natural battery.
.
[TV].
BBC Natural History.
Show summary
Interview of:
Jader Monari, Stelio Montebugnoli, Anna-Lena Kjøniksen & Bjørn Gitle Hauge by:
Jolyon Sutcliffe
RESEARCHER
Nature's weirdest events
BBC Natural History Unit
Broadcasting House, Whiteladies Road,
Bristol, BS8 2LR
-
Kjøniksen, Anna-Lena
(2016).
Hva skal til for å gjennomføre et forskningsprosjekt.
-
Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena; Strand, Erling Petter & Andersson, Gunnar
(2016).
IR + Olav Thon = Sant !
[Internet].
HiØ Fou blogg.
-
-
Al-Manasir, Nodar; Juvik, D. A. & Kjøniksen, Anna-Lena
(2015).
The Challenges of using Antifreeze Admixtures in Concrete Science.
-
Al-Manasir, Nodar; Kjøniksen, Anna-Lena & Soto, David
(2015).
Characterization of the Rheological Properties of Fresh Concrete.
-
Hauge, Bjørn Gitle; Kjøniksen, Anna-Lena & Strand, Erling Petter
(2015).
Analyzed data from the 2014 Science Camp in Hessdalen.
-
-
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2015).
Samarbeid på svorsk i realfag.
[Internet].
Khrono.
Show summary
HiØ. 30 mill. er satt av i et svensk-norsk samarbeid i realfag og teknologi.
Interreg-prosjektet Scandinavian Science Cluster (SSC) er et treåring prosjekt og et samarbeid mellom store aktører i Norge og Sverige som skal jobbe sammen for å mobilisere akademia, industri, myndigheter og vitensentre. Det er satt av 30 millioner kroner til prosjektet.
-
-
Che, Loan Trinh; Kjøniksen, Anna-Lena; Lambermont-Thijs, Hanneke M. L.; Hoogenboom, Richard; Schubert, Ulrich S. & Hiorth, Marianne
(2015).
Complex Temperature and Concentration – dependent Self-assembly of Poly(2-oxazoline) Block Copolymers.
-
Kjøniksen, Anna-Lena
(2015).
Is the Size Increase of my Nanoparticles Due to Swelling or Aggregation?
-
Kjøniksen, Anna-Lena
(2015).
Swelling and Aggregation both Increase the Size of Polymer Nanoparticles, How do we Tell the Difference?
-
Kjøniksen, Anna-Lena; Pamies, Ramon Francisco Porras; Al-Manasir, Nodar; Zhu, Kaizheng & Nyström, Bo
(2015).
Thermoresponsive Poly(N-Isopropylacrylamide) Star Polymers.
-
Kjøniksen, Anna-Lena
(2015).
Smart Betong.
-
Kjøniksen, Anna-Lena
(2014).
Hvordan forskning foregår i praksis.
-
Kjøniksen, Anna-Lena
(2014).
Superbetong.
[Radio].
NRK, Distriktsprogram - Østfold, Morran i Østfold 18.
-
-
Hauge, Bjørn Gitle & Kjøniksen, Anna-Lena
(2014).
Gjør "gull" av betong. Banebrytende forskning på betongens egenskaper er målsetningen når ingeniøravdelingen tar fatt på Høgskolen i Østfolds største prosjekt noensinne.
[Internet].
HiØ Aktielt.
-
-
Kjøniksen, Anna-Lena
(2014).
Hva er plast og plastfraksjoner?
-
Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne
(2013).
Polysaccharide-based Nanoparticles as a Drug Delivery System - Preparation and Physico-chemial Characterization.
-
Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Sande, Sverre Arne; Nyström, Bo & Cardoso, Ana Maria S.
[Show all 10 contributors for this article]
(2013).
Temperature-Responsive Polymers as Nanocarriers for Gene Delivery.
-
Kjøniksen, Anna-Lena
(2013).
Nanoteknologiens innvirkning på mekaniske styrke- og materialegenskaper i plast og kompositter.
-
-
Klemetsrud, Therese; Hiorth, Marianne ; Kjøniksen, Anna-Lena & Smistad, Gro
(2013).
Liposomal complexes that changes around body temperature.
-
Yip, Wai Lam; Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne
(2013).
Preparation of chitosan nanoparticles – a multivariate approach.
-
Trinh, Loan Thi To; Lambermont-Thijs, Hanneke M. L.; Schubert, Ulrich S.; Hoogenboom, Richard & Kjøniksen, Anna-Lena
(2012).
Thermoresponsive poly(2-oxazoline) block copolymers exhibiting two cloud points: Complex multistep assembly behavior.
-
Kjøniksen, Anna-Lena; Jonassen, Helene & Hiorth, Marianne
(2012).
Chitosan Nanoparticles for Drug Delivery Applications.
-
Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne
(2012).
Polysakkarid-baserte nanopartikler som legemiddelform.
-
Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne
(2012).
Compactness of chitosan nanoparticles and implications in drug delivery.
-
Jonassen, Helene; Kjøniksen, Anna-Lena & Hiorth, Marianne
(2011).
Adjustment of solvent salinity in the preparation of chitosan nanoparticles – effects on important particle characteristics.
-
Kjøniksen, Anna-Lena & Jonassen, Helene
(2011).
Determination of Particle Compactness of Polymer Nanoparticles, and the Effect on Drug Release Rates.
-
Calejo, Maria Teresa Rebelo; Kjøniksen, Anna-Lena; Maleki, Atoosa; Nyström, Bo & Sande, Sverre Arne
(2011).
Influence of Hydrophobicity and Process Factors in the Production of Chitosan Microparticles for the Delivery of Opioid Antagonists.
-
Kjøniksen, Anna-Lena; Calejo, Maria Teresa Rebelo; Zhu, Kaizheng; Maleki, Atoosa; Al-Manasir, Nodar & Nyström, Bo
[Show all 7 contributors for this article]
(2011).
The use of Thermosensitive PNIPAAM Microgels for Sustained Release of the Opiod Antagonist Naltrexone.
-
Nyström, Bo; Pamies, Ramón; Zhu, Kaizheng; Volden, Sondre; Kjøniksen, Anna-Lena & Karlsson, Göran
[Show all 7 contributors for this article]
(2011).
Temperature-Induced Polyelectrolyte Bridging Interaction of Gold Nanoparticles with an Adsorbed Temperature Sensitive Cationic Copolymer.
-
Nyström, Bo; Pamies, Ramón; Zhu, Kaizheng; Volden, Sondre; Kjøniksen, Anna-Lena & Karlsson, Göran
[Show all 7 contributors for this article]
(2011).
Temperature-Induced Polyelectrolyte Bridging Interaction of Gold Nanoparticles with an Adsorbed Thermoresponsive Cationic Copolymer.
-
Nyström, Bo; Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Knudsen, Kenneth D
(2011).
Temperature-Induced Structural and Viscosification Behavior in Aqueous Solutions of Charged Pentablock Tercopolymers.
-
Kjøniksen, Anna-Lena; Pamies, Ramón; Zhu, Kaizheng & Nyström, Bo
(2010).
Temperature-induced Polyelectrolyte Bridging Flocculation of Gold Nanoparticles with an Adsorbed Thermoresponsive Cationic Copolymer.
-
Nyström, Bo; Zhu, Kaizheng; Pamies, Ramon Francisco Porras; Maleki, Atoosa & Kjøniksen, Anna-Lena
(2010).
Special Features of Thermoresponsive Amphiphilic Copolymers - Experimental Results and Simulations.
-
Kjøniksen, Anna-Lena; Phan, Hang; Zhu, Kaizheng & Nyström, Bo
(2010).
Thermosensitivehydroxyethylcellulose-graft-poly(N-isopropylacrylamide) nanoparticles.
-
Kjøniksen, Anna-Lena; Zhu, Kaizheng; Pamies, Ramón & Nyström, Bo
(2010).
Influence of Block Size on Thermoresponsive Diblock Copolymers.
-
Trinh, Loan Thi To; Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo
(2010).
Temperature-induced Adsorption and Optical Prperties of an Amphifilic Diblock Copolymer Adsorbed onto Flat and Curved Siver surfaces.
-
Phan, Hang; Kjøniksen, Anna-Lena & Nyström, Bo
(2010).
Thermoresponsive Properties of Hydroxyethyl cellulose Grafted with poly-(N-isopropyl acrylamide).
-
Nyström, Bo; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Sande, Sverre Arne
(2010).
Temperature Responsive Gels Containing PNIPAAM in Combination with PAMAM Dendrimers.
-
Al-Manasir, Nodar; Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo
(2009).
Functional Microgels for Enhanced Oil Recovery Applications.
-
Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo
(2009).
Association and Degradation Behavior of Aqueous Solutions of Pig Gastric Mucin and Hyaluronan. Rheo-Small Angle Light Scattering and High Pressure Studies.
-
Nyström, Bo; Al-Manasir, Nodar; Kjøniksen, Anna-Lena; Maleki, Atoosa; Beheshti, Neda & Zhu, Kaizheng
[Show all 8 contributors for this article]
(2009).
Characterization of Structural and Dynamical Features in Aqueous Solutions of Amphiphilic Copolymers.
-
Nyström, Bo; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Behrens, Manja & Pedersen, Jan Skov
(2009).
Thermosensitive Anionic Triblock Copolymers.
-
Glomm, Wilhelm; Volden, Sondre; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Yasuda, Masahiro & Genzer, Jan
[Show all 7 contributors for this article]
(2009).
Temperature-dependent optical properties of gold nanoparticles coated with PNIPAAM-derivates and Immunoglobulin G.
-
Beheshti, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo
(2009).
Characterization of Interactions in Mixed Oppositely Charged Polyelectrolyte Systems.
-
Al-Manasir, Nodar; Kjøniksen, Anna-Lena & Nyström, Bo
(2009).
Chemical Cross-Linked Nanoparticles with Potential for Enhanced Oil Recovery Applications.
-
Glomm, Wilhelm; Volden, Sondre; Kjøniksen, Anna-Lena; Zhu, Kaizheng; Yasuda, Masahiro & Genzer, Jan
[Show all 7 contributors for this article]
(2009).
Thermoresponsive amphihilic polymers on gold nanoparticles.
-
Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo
(2009).
Temperature Responsive Copolymers in Aqueous Solutions.
-
Kjøniksen, Anna-Lena; Zhu, Kaizheng & Nyström, Bo
(2009).
Thermosensitive triblock copolymers.
-
Trinh, Loan Thi To; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo
(2009).
Salt-Induced Aggregation of Silver Nanoparticles in Aqueous Solutions of Cellulose Derivatives.
-
Al-Manasir, Nodar; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo
(2009).
Temperature- and pH-Responsive PNIPAAM-co-PAA Microgel.
-
Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo
(2008).
Effect of pH and Different Cross-Linker Agents on the Degradation of Hyaluronic Acid Solutions.
-
Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo
(2008).
Atom Transfer Radical Polymerization Synthesis of Charged Thermoresponsive Triblock Copolymers.
-
Nyström, Bo; Pamies, Ramon Francisco Porras; Zhu, Kaizheng & Kjøniksen, Anna-Lena
(2008).
Temperature-Induced Assemmbling and Contraction of Thermoresponsive Uncharged and Charged Block Copolymers in Aqueous Solution.
-
Beheshtivadeghani, Neda; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo
(2007).
Effects of b-cyclodextrin and b-cyclodextrin Polymer Addition and Temperature on the Modulation of Hydrophobic Interactions in Aqueous Solutions of Two Hydrophobically Modified Biopolymers.
-
Maleki, Atoosa; Nyström, Bo & Kjøniksen, Anna-Lena
(2007).
Anomalous Rheological and Structural Behavior in Aqueous Solutions and Cross-Linked Gels of Hyaluronic Acid.
-
Kjøniksen, Anna-Lena; Zhu, Kaizheng; Nyström, Bo & Beheshti, Neda
(2007).
Modified Polysaccharides for use in Enhanced Oil Recovery Applications.
-
Nyström, Bo; Kjøniksen, Anna-Lena; Zhu, Kaizheng & Jin, Huiting
(2007).
Temperature-induced formation and contraction of micelle-like aggregates in aqueous solutions of thermoresponsive short-chain copolymers.
-
Nyström, Bo; Maleki, Atoosa; Liu, Zhengjun; Zhu, Kaizheng & Kjøniksen, Anna-Lena
(2007).
Intramolecular and intermolecular association during chemical cross-linking of dilute solutions of different polysaccharides under the influence of shear flow.
-
Beheshti, Neda; Nyström, Bo; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nguyen, Giao
(2006).
Structure and Dynamics of an Anionic Cellulose Derivative and Anionic or Cationic Surfactants.
-
Maleki, Atoosa; Silioc, Christelle; Zhu, Kaizheng; Kjøniksen, Anna-Lena & Nyström, Bo
(2006).
Effect of Hydrophobic Modification on Rheological and Swelling Features during Chemical Gelation of Aqueous Hydroxyethylcellulose.
-
Maleki, Atoosa; Beheshti, Neda; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo
(2006).
Structural and Dynamical Behaviour of Some Cellulose Derivatives in the Presence of Cross-Linker and Surfactants.
-
Beheshti, Neda; Nyström, Bo; Kjøniksen, Anna-Lena; Knudsen, Kenneth D.; Huaitian, Bu & Naess, Stine N
[Show all 8 contributors for this article]
(2006).
Structural and Rheological Features of Aqueous Solutions of Hydroxyethylcellulose and Its Hydrophobically Modified Analogue in the Presence of a Cyclodextrin Derivative.
-
Maleki, Atoosa; Beheshti, Neda; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Nyström, Bo
(2006).
Structural and Dynamical Characteristics of Amphiphilic Polymers.
-
Nyström, Bo; Galant, Céline; Kjøniksen, Anna-Lena; Knudsen, Kenneth D.; Amiel, Catherine & Burckbuchler, Virginie
(2005).
Thermo-Responsive Interaction between Beta-Cyclodextrin and Amphiphilic Biopolymers.
-
Nyström, Bo; Huaitian, Bu; Kjøniksen, Anna-Lena; Knudsen, Kenneth D. & Maleki, Atoosa
(2005).
Characterization of Intermolecular Associations and Intramolecular Interactions in Aqueous Polymer Systems.
-
Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo
(2005).
Competition Between Intramolecular and Intermolecular Interactions and effect of Shear Rate during Chemical Cross-Linking of Dilute Solutions of Hydroxy(ethylcellulose).
-
Maleki, Atoosa; Kjøniksen, Anna-Lena & Nyström, Bo
(2005).
Effect of Cross-Linking Density on Structure, Dynamics and Rheology of Chemically Cross-Linked Hydroxy(ethylcellulose) near the Gelation Threshold.
-
Kjøniksen, Anna-Lena
(2004).
Physical Properties of Aqueous Solutions of a Thermoreversibly Associating Co-Polymer.
-
Kjøniksen, Anna-Lena
(2003).
Thermally Controlled Chain Association in Aqueous Solutions of Poly(N-isopropyl acrylamide)-g-Poly(ethylene oxide). Dynamic Light Scattering.
-
Lauten, Rolf Andreas; Knutsen, K. D.; Kjøniksen, Anna-Lena & Nyström, Bo
(2003).
Bulk and adsorption properties of an hydrophobically modified poly(vinyl alcohol) and its unmodified analogue in the presence of salt.
-
Kjøniksen, Anna-Lena; Nordby, Marianne Hiorth & Nyström, Bo
(2003).
Shear-Induced Association and Gelation of Aqueous Solutions of Pectin.
-
Baldursdottir, Stefania; Nyström, Bo; Kjøniksen, Anna-Lena; Roots, Jaan; Karlsen, Jan & Tønnesen, Hanne Hjorth
(2002).
Degradation of Alginate by Riboflavin Photosensitizer.
Show summary
Purpose: The possibility of using photosensitized degradation of biopolmers in order to develop a light activated drug delivery system was investigated. Riboflavin was added to solutions of alginate and the viscosity of the samples was measured as a function of irradiation time. Various quenchers and scavengers were added to the system in order to obtain information on the degradation process. Methods: The alginate samples were exposed to a xenon lamp (1.8kW) equipped with a glass filter transmitting light corresponding to exposure behind window glass (cut-off ~310nm). Changes in sample viscosity was determined by use of a Bohlin rheometer. Chemical- and/or conformational changes in the alginate structure were characterized by light scattering methods. The absorbance and fluorescence spectra of the samples were recorded to detect possible interactions between the reactants and alginate and to follow the conversion of riboflavin into lumichrome. The effect of various scavengers and quenchers on the photosensitized viscosity change was determined. Results: The decrease in viscosity was about 5% and 38% in the absence and presence of sensitizer (riboflavin) respectively after 30 minutes exposure. The main part of the viscosity change did however take place during the initial five minutes of irradiation. This corresponds to the conversion of riboflavin into lumichrome in this system. A combination of glutathion (free radical scavenger) and sodium azid (singlet oxygen quencher) had a strongly retarding effect on the decrease in viscosity when added to the system in the presence of riboflavin. The photosensitized loss of viscosity seems to be related to a combination of polymer degradation and structural changes. Conclusion: The molecular weight and structure of alginate can be strongly affected by light in the presence of a sensitizer. The effect of riboflavin on alginate is most likely due to the formation of singlet oxygen and free radicals resulting from the photodegradation of riboflavin to lumichrome. This demonstrates that photosensitized degradation of alginate has a potential in the design of light activated biopolymer systems. Other sensitizers are now under evaluation in order to optimize the reaction.
-
Lauten, Rolf Andreas; Nyström, Bo & Kjøniksen, Anna-Lena
(2001).
Salt-induced particle aggregation in the presence of amphiphilic polymers of different hydrophobicity.
-
Kjøniksen, Anna-Lena
(1999).
Effect of Surfactant on Dynamic and Viscoelastic Properties of Aqueous Solutions of Hydrophobically Modified Ethyl(hydroxyethyl)cellulose, with and without Spacer.
-
Kjøniksen, Anna-Lena
(1998).
Light Scattering from Aqueous Solutions of Polymer Blends.
-
Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo
(1998).
Gelling Aqueous Systems of Ethyl(hydroxyethyl)cellulose.
-
Kjøniksen, Anna-Lena
(1997).
Rheological Behavior of Aqueous Solutions of Ethyl(hydroxyethyl)cellulose in the Presence of Various Amounts of Surfactant.
-
Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo
(1997).
The Effects of Salinity and Surfactant Addition on Dynamics of Dilute Aqueous Solutions of Ethyl(hydroxyethyl)cellulose.
-
Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo
(1997).
Dynamic Light Scattering on Aqueous Solutions of EHEC-SDS with and without Salt.
-
Kjøniksen, Anna-Lena; Lindman, Björn & Nyström, Bo
(1997).
Dynamic Light Scattering on Semidilute Aqueous Systems of Ethyl(hydroxyethyl)cellulose. Effects of Temperature, Surfactant Concentration and Salinity.
-
Kjøniksen, Anna-Lena & Nyström, Bo
(1995).
The Sol-Gel Transition of Aqueous Systems of Poly(vinyl alcohol) Studied by Dynamic Light Scattering and Oscillatory Shear Measurements.
-
-
-
-
-
Kjøniksen, Anna-Lena
(2004).
Sample Preparation - Dialysis - Centrifugation - Freeze drying.
Universitetet i Oslo.
-
Kjøniksen, Anna-Lena
(2004).
Densiometry - pH - Turbidity.
Universitetet i Oslo.
-
Kjøniksen, Anna-Lena
(2004).
Static Light Scattering.
Universitetet i Oslo.
-
Kjøniksen, Anna-Lena
(2004).
Dynamic Light Scattering.
Universitetet i Oslo.
-
Kjøniksen, Anna-Lena
(2004).
Rheology.
Universitetet i Oslo.
