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Recycling polymers by site-specific scission into short-chain oligomers/polymers, followed by recoupling these to form the original polymer presents an energetically more favorable shorter-loop chemical recycling in comparison to recycling into monomers. Here, we present the synthesis and polymerization of triaromatic diesters to prepare polyesters with acylhydrazone units as weak structural links

This paper reports on a corpus of Brazilian Portuguese (BP) mandible movements. The data was collected using a recently available technique, the MARRYS helmet, which allows for quick and reliable collection of mandible data of a large number of speakers. Audio and mandible were recorded from more than 90 L1 and L2 BP speakers. The recording process and signal synchronization are presented. A parti

Gardens are important habitats for pollinators, providing floral resources and nesting sites. There are high levels of public support for growing ‘pollinator-friendly’ plants but while plant recommendation lists are available, they are usually inconsistent, poorly supported by scientific research and target a narrow group of pollinators. In order to supply the most appropriate resources, there is

U-Pb geochronology on baddeleyite is a powerful technique that can be applied effectively to chronostratigraphy. In southern Africa, the Kaapvaal Craton hosts a well-preserved Mesoarchean to Paleoproterozoic geological record, including the Neoarchean Ventersdorp Supergroup. It overlies the Witwatersrand Supergroup and its world-class gold deposits. The Ventersdorp Supergroup comprises the Klipriv

We present an analysis of regulatory activities in historical commons offering a unique picture of their long-term institutional dynamics. The analysis took into account almost 3,800 regulatory activities in eighteen European commons in two countries across seven centuries. Despite differences in time and space, we found a shared pattern where an initial, highly-dynamic institutional-definition ph

Methods to supply fresh water are becoming increasingly critical as the world population continues to grow. Small-diameter hazardous microbes such as viruses (20-100 nm diameter) can be filtered by size exclusion, but in this approach the filters are fouled. Thus, in our research, we are investigating an approach in which filters will be reusable. When exposed to ultraviolet (UV) illumination, tit

Popular Abstract in Swedish Färger innehåller mer tillförlitlig information än vad bara skillnader i ljusintensitet gör. Det är därför inte svårt att förstå varför de allra flesta landlevande ryggradsdjur har färgseende. Några upplever en färgfattigare värld än vi människor, men många ser fler färgnyanser. På kvällen däremot gör bristen på ljus det svårt att se färger. Trots detta finns det nattakMost terrestrial vertebrates have colour vision, some perceive a less colourful world and others actually discriminate a wider colour spectrum than humans do. Still, we can all make use of the valuable colour information, which is more rigid than just brightness. However, at night when the light is dim, the lack of photons makes colour vision difficult. Nevertheless, some hawkmoths and bees can se

Det är nedslående att Cecilia Malmström givit upp kampen när det gäller fri- och rättigheter på nätet, skriver politiker och nätdebattörer. Den rättssäkerhet vi efterfrågar är en sådan som skyddar yttrandefriheten.

According to film mythology, the Soviet filmmaker Lev Kuleshov conducted an experiment in which he combined a close-up of an actor’s neutral face with three different emotional contexts: happiness, sadness, and hunger. The viewers of the three film sequences reportedly perceived the actor’s face as expressing an emotion congruent with the given context. It is not clear, however, whether or not the

Deep eutectic solvents (DES) and their hydrated mixtures are used for solvothermal routes towards greener functional nanomaterials. Here we present the first static structural and in situ studies of the formation of iron oxide (hematite) nanoparticles in a DES of choline chloride : urea where xurea = 0.67 (aka. reline) as an exemplar solvothermal reaction, and observe the effects of water on the r

A semi-empirical method inspired by Blomqvist's (1969) previous calculations of the excitation energy of the lowest 9/2- state of 201Tl is applied to similar calculations in different Tl, Au and Ir isotopes. These semi-empirical estimates agree well with the experimental values of the excitation energies as well as with the energy differences deduced from the analysis of the total potential energy

We find that CO ligates selectively to nitrogen tetra-coordinated Co(i) single metal atom sites at room temperature in a manganese–cobalt bi-metallic coordination network self-assembled on graphene. The bound state is metastable, determined by pressure-dependent equilibrium conditions between adsorption and desorption, with an upright, end-on bonding geometry (binding energy 0.73 eV). The ligand v

Unlimited vacation policies are a rising trend, particularly among startup and tech companies. Giving employees total freedom to choose their vacation days may prove to be beneficial for both company and employees. Within this paper, a qualitative research is presented, with the objective of finding out how unlimited vacation policies (UVPs) influence job satisfaction among employees, and what imp

Detta examensarbete undersöker hur de uppdaterade kriterierna i certifieringssystemet Miljöbyggnad påverkar hållbarhetsmålen inom bygg- och fastighetssektorn. Arbetet utgår från den centrala problematiken att byggsektorn är en av de största källorna till utsläpp och negativ miljöpåverkan. Miljöcertifieringssystem har potentialen att minska den negativa miljöpåverkan inom bygg- och fastighetssektorThis thesis examines how the updated criteria in the Miljöbyggnad certification system affect sustainability goals in the construction and real estate sector. The work is based on that the construction sector is one of the largest sources of emissions and negative environmental impact. Environmental assessment methods have the potential to reduce the negative environmental impact of the constructi

In this thesis, we apply Bayesian Optimization to estimate the parameters of the LPJ-GUESS dynamic vegetation model with a focus on Methane (CH4) emissions in the Siikaneva wetland in Finland. Previous research has used other statistical methods, such as Markov Chain Monte Carlo (MCMC), to estimate the LPJ-GUESS model parameters, achieving a root mean square error (RMSE) of 0.023. Our objective is

This thesis explores the escalating and often underestimated issue of bird-window collisions, specifically within the Swedish context, through the lens of the built environment. Globally, hundreds of millions of birds die annually from colliding with glass surfaces, with estimates reaching nearly a billion birds in North America alone. This significant threat is compounded by modern architectural

svårt att få barn – Vetenskap och Hälsa Hoppa till innehåll Vetenskap och hälsa Populärvetenskapligt om medicinsk forskning i Skåne Teman Podd Tidskrift Prenumerera Om webbplatsen Kontakt Sök Sök Etikett: svårt att få barn Recept för fler barn: fler IVF-försök och yngre mammor 2026-06-29 Det har aldrig fötts så få barn som nu och det finns många orsaker till det. Två tunga skäl är okunskap om att

https://www.vetenskaphalsa.se/tag/svart-att-fa-barn/ - 2026-07-20