| 1. |
- Hult, G. Tomas M., et al.
(författare)
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A Ten Country-Company Study of Sustainability and Product-Market Performance : Influences of Doing Good, Warm Glow, and Price Fairness
- 2018
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Ingår i: Journal of Macromarketing. - : Sage Publications. - 0276-1467 .- 1552-6534. ; 38:3, s. 242-261
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Tidskriftsartikel (refereegranskat)abstract
- Countries, companies, and customers are becoming increasingly concerned with sustainability. However, it is unclear how much increased cost, if any, companies are willing to tolerate for sustainability efforts at the rate of potentially lower profits. Plus, what are the customers' sensitivities to the prices of products/services that are developed within the realm of sustainability initiatives (e.g., how much more can the products/services cost and still be viable)? Additionally, with 193 countries of the United Nations ratifying the Sustainable Development Goals, we know that countries are focused on sustainability, but can companies achieve positive sustainability effects on performance above what countries are doing? Consequently, what are the macro-micro dynamics in play for sustainability efforts? In a 10-country study involving 4,051 companies, we examine these macro-micro (country-company) dynamics, company costs, customer costs, and price sensitivities on the effects of sustainability on companies' performance. The results indicate that positive effects on companies' performance can be achieved (1) from the companies' sustainability efforts in all 10 countries studied, (2) even if the costs and/or prices increased by 27 to 72 percent (depending on the dynamic and scenario), and (3) by companies implementing sustainability efforts that are 5 to 30 percent above the efforts of the country. Increased sustainability effects can also be gained from lowering customer and company costs, but no such effects were found when lowering product prices.
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| 2. |
- Lundberg, Pontus, 1982-, et al.
(författare)
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Linear dendritic polymeric amphiphiles with intrinsic biocompatibility: synthesis and characterization to fabrication of micelles and honeycomb membranes
- 2011
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Ingår i: Polymer Chemistry. - 1759-9954. ; 2, s. 394-402
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Tidskriftsartikel (refereegranskat)abstract
- Linear dendritic hybrid materials enable a range of architectural variations which offers novel possibilities in the tailoring of polymeric materials. In this study dendrons based on the 2,2-bis(methylol)propionic acid (bis-MPA) building block, bearing click chemistry moieties in the core and peripheral hydroxyl functionalities, have been used as macroinitiators for ring opening polymerization of ε-caprolactone. A library of star branched polymers with poly(ε-caprolactone) chains was initially constructed using dendrons up to 4th generation. In a second step, the popular CuAAC or thiol–ene click reaction was efficiently used to attach poly(ethylene glycol) chains of different lengths to the core. Potential applications of the resulted amphiphilic linear dendritic hybrids were investigated. Both self-assembled micelles loaded with doxorubicin anticancer drug and ordered honeycomb membranes with enhanced surface area were successfully fabricated and characterized.
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| 3. |
- Walter, Marie V., et al.
(författare)
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A one component methodology for the fabrication of honeycomb films from biocompatible amphiphilic block copolymer hybrids : a linear-dendritic-linear twist
- 2013
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Ingår i: Polymer Chemistry. - 1759-9954. ; 4:9, s. 2680-2690
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Tidskriftsartikel (refereegranskat)abstract
- The development of a facile method for the fabrication of breath figure (BF) films from hydrophobic polymers is gaining significant importance for their accessibility as templates in fields ranging from electronics and cell culturing to sensing and catalysis. By introducing polyester-based dendritic linkers, a library of micrometre sized honeycomb structures was successfully fabricated from amphiphilic linear-dendritic-linear hybrids comprising hydrophobic PCL or PLA and hydrophilic PEG blocks. From the array of produced films, the incorporation of a third generation dendritic linker was found to generate well-ordered honeycomb films in the several hundreds of micrometre range. This one component approach minimizes the number of unknown parameters and represents a fully reliable methodology for the fabrication of functional BFs from challenging and biocompatible polymers.
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| 4. |
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| 5. |
- Andrén, Oliver C. J., et al.
(författare)
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Antibiotic-Free Cationic Dendritic Hydrogels as Surgical-Site-Infection-Inhibiting Coatings
- 2019
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Ingår i: Advanced Healthcare Materials. - : Wiley. - 2192-2640 .- 2192-2659.
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Tidskriftsartikel (refereegranskat)abstract
- A non-toxic hydrolytically fast-degradable antibacterial hydrogel is herein presented to preemptively treat surgical site infections during the first crucial 24 h period without relying on conventional antibiotics. The approach capitalizes on a two-component system that form antibacterial hydrogels within 1 min and consist of i) an amine functional linear-dendritic hybrid based on linear poly(ethylene glycol) and dendritic 2,2-bis(hydroxymethyl)propionic acid, and ii) a di-N-hydroxysuccinimide functional poly(ethylene glycol) cross-linker. Broad spectrum antibacterial effect is achieved by multivalent representation of catatonically charged β-alanine on the dendritic periphery of the linear dendritic component. The hydrogels can be applied readily in an in vivo setting using a two-component syringe delivery system and the mechanical properties can accurately be tuned in the range equivalent to fat tissue and cartilage (G' = 0.5-8 kPa). The antibacterial effect is demonstrated both in vitro toward a range of relevant bacterial strains and in an in vivo mouse model of surgical site infection.
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| 6. |
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| 7. |
- Antoni, Per, et al.
(författare)
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A chemoselective approach for the accelerated synthesis of well-defined dendritic architectures
- 2007
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; :22, s. 2249-2251
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Tidskriftsartikel (refereegranskat)abstract
- A chemoselective and layered growth approach has been developed for the synthesis of dendrimers, combining Click chemistry with traditional esterification/etherification reactions, without the need for activation steps and with excellent overall yields.
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| 9. |
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| 10. |
- Antoni, Per, et al.
(författare)
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Europium confined cyclen dendrimers with photophysically active triazoles
- 2008
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Ingår i: Journal of Materials Chemistry. - : Royal Society of Chemistry (RSC). - 0959-9428 .- 1364-5501. ; 18:22, s. 2545-2554
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Tidskriftsartikel (refereegranskat)abstract
- Dendrimers up to the fourth generation (G1-G4) were successfully synthesized via the efficient copper catalyzed 1,3-dipolar cycloaddition between primary alkynes and azides (CuAAC), also referred to as a click reaction. The synthetic protocol involved the preparation of presynthesized dendron wedges that subsequently were attached to a tetra-valent alkyne functional cyclen core. These constructed structures integrated stable triazole groups "intra-locked'' between the cyclen and dendron wedges. The incorporation of a lanthanide metal ion, europium, into the interior of all cyclen dendrimers was monitored by FT-IR. Interestingly, the photophysical results showed that the proximate triazole not only acts as a stable linker but also as a sensitizers, transferring its singlet-singlet excitation in the ultraviolet region (270-290 nm) to the partially filled luminescent lanthanide 4f shell. An increase of luminescence decay time from the lanthanide D-5(0) -> F-7(2) emission was observed with increasing dendrimer size, indicating that the shielding effect of the dendron wedges is important for the relaxation of the photo-excitation and energy transfer. To the best of our knowledge, this is the first time a set of dendron wedges have successfully been attached to a cyclen metal ion cage via the versatile click reaction. Furthermore, the produced triazoles intra-locked in close proximity to the macrocycle core elucidated an interesting photophysical function.
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