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Spray-drying of trypsin - Surface characterisation and activity preservation

In the present study trypsin mixed with various carbohydrates, i.e. lactose, sucrose, mannitol, α-cyclodextrin and dextrin, was spray-dried in order to investigate the effects of spray-drying on this enzyme, with particular emphasis on the effects of interactions between trypsin and the surface formed during spray-drying. The protein was strongly over-represented at the surface of the powder parti

Surface characterisation of freeze-dried protein/carbohydrate mixtures

In the present investigation freeze-drying of proteins (BSA or trypsin) together with various carbohydrates, i.e. lactose, sucrose, mannitol, α-cyclodextrin and dextrin, has been studied with particular emphasis on the surface composition of the freeze-dried powders. The proteins were found to be over-represented on the powder surface as compared to the bulk concentration of protein. The mechanism

Regioselective synthesis of dimeric (gemini) and trimeric sugar-based surfactants

A simple and flexible chemoenzymatic route for the preparation of a wide range of dimeric (gemini) and trimeric mono- and disaccharide-based surfactants was developed. The synthesis relies on the use of enzymes for regioselective introduction of fatty acids into carbohydrate moieties. Several structures were prepared containing xylose, glucose, galactose, and lactose, connected via different hydro

Enzymatic transformations in supersaturated substrate solutions : II. Synthesis of disaccharides via transglycosylation

Enzymatic transglycosylation in supersaturated solutions of substrates was investigated using crude glycosidase preparations from barley, snail, and coffee beans. It was shown that the use of supersaturated glycoside solutions as media for transglycosylation reactions offers considerable advantages over conventional aqueous systems. These advantages include higher yields, more efficient use of the

Enzymatic transformations in supersaturated substrate solutions : I. A general study with glycosidases

The results of an initial study of enzymatic catalysis in metastable supersaturated solutions of carbohydrates are presented. It has been shown that such solutions, formed in the presence of small amounts of water and alcohol as plasticizers, are sufficiently stable under ambient conditions to enable enzymatic transformations of substrates. A partial phase diagram for a system consisting of glucos

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Creating shared value (CSV), environmental, social, and governance (ESG) investing, and responsible business conduct (RBC) are three frameworks used to assess companies' sustainability impacts. As a relative newcomer, we assess the role of CSV developed in the strategic management studies of Porter and Kramer in light of recent developments in ESG and RBC. Each framework offers its own perspective

Dynastic Centralisation and Court Constellations : Duke-King Relations in Early Seventeenth-Century Sweden

This article explores how dynastic centralisation in early seventeenth-century Sweden shaped relations between dukes and kings as well as their respective courts. Focusing on Duke Johan of Östergötland, it examines how courtly socialisation influenced Johan’s loyalty to his uncle, Charles IX, and cousin, Gustavus Adolphus. Drawing on correspondence and court records, the study argues that Johan’s

Regioselective synthesis of ethoxylated glycoside esters using β-glucosidase in supersaturated solutions and lipases in organic solvents

Three ethoxylated glycosides, tetraethylene glycol β-D-glucoside, tetraethylene glycol β-D-xyloside, and methoxy triethyleneglycol β-D- glucoside, were prepared via almond β-glucoside-catalyzed (trans)glycosylation carried out in supersaturated solutions of glucose or p- nitrophenyl β-D-xyloside and the respective polyethylene glycols. The products were isolated and further modified by enzymatic e

Structural Insights into Common and Host-Specific Receptor-Binding Mechanisms in Algal Picorna-like Viruses

Marnaviridae viruses are abundant algal viruses that regulate the dynamics of algal blooms in aquatic environments. They employ a narrow host range because they merely lyse their algal host species. This host-specific lysis is thought to correspond to the unique receptor-binding mechanism of the Marnaviridae viruses. Here, we present the atomic structures of the full and empty capsids of Chaetocer

Corynebacteria from the respiratory microbiota modulate inflammatory responses and associate with a reduced pneumococcal burden in the lungs

Background: Certain species from the normal respiratory tract microbiota have recently been proposed to positively influence human health. Corynebacterium propinquum and C. pseudodiphtheriticum (Corynebacteria) are two Gram-positive species that frequently colonize the upper respiratory tract and strongly associate with a reduced incidence of respiratory tract infections. The specific role of Cory

Primordial Capsid and Spooled ssDNA Genome Structures Unravel Ancestral Events of Eukaryotic Viruses

Marine algae viruses are important for controlling microorganism communities in the marine ecosystem and played fundamental roles during the early events of viral evolution. Here, we have focused on one major group of marine algae viruses, the single-stranded DNA (ssDNA) viruses from the Bacilladnaviridae family. We present the capsid structure of the bacilladnavirus Chaetoceros tenuissimus DNA vi

Capsid structure of a marine algal virus of the order picornavirales

The order Picornavirales includes viruses that infect different kinds of eukaryotes and that share similar properties. The capsid proteins (CPs) of viruses in the order that infect unicellular organisms, such as algae, presumably possess certain characteristics that have changed little over the course of evolution, and thus these viruses may resemble the Picornavirales ancestor in some respects. H

Microstructural deformation of zircon during impact metamorphism

Impact craters are among the most pervasive geological features on solid bodies throughout the inner Solar System. The heavily cratered surface of the Moon offers a stark visual record of the Solar System’s early history of intense bombardment, a record largely absents from Earth’s dynamic surface. Despite having experienced a comparable flux of impact events over deep time, Earth's geological pro

The legacy of names : Persistence in social status in Sweden 1865-2015

This study explores how social origin, reflected by occupation and family name from both parents, has been passed down over the past 150 years in Sweden. It finds that intergenerational rank-rank associations in occupational status – a typical measure of social mobility – have remained surprisingly constant at levels around 0.27 – as in the US (Song et al., 2020). However, intergenerational correl

Real-time data processing for serial crystallography experiments

We report the use of streaming data interfaces to perform fully online data processing for serial crystallography experiments, without storing intermediate data on disk. The system produces Bragg reflection intensity measurements suitable for scaling and merging, with a latency of less than 1 s per frame. Our system uses the CrystFEL software in combination with the ASAP::O data framework. In a se

Structure of the Lysinibacillus sphaericus Tpp49Aa1 pesticidal protein elucidated from natural crystals using MHz-SFX.

The Lysinibacillus sphaericus proteins Tpp49Aa1 and Cry48Aa1 can together act as a toxin toward the mosquito Culex quinquefasciatus and have potential use in biocontrol. Given that proteins with sequence homology to the individual proteins can have activity alone against other insect species, the structure of Tpp49Aa1 was solved in order to understand this protein more fully and inform the desig

Flood analysis and protection system : Application to The Hongru River

The definition of a decision support system(DSS) may be : human-computer interactive software system to solve semi-structured decisional problems for decisional makers with data utilizing, information management, knowledge, as well as model techniques. DSS only provide supporting information about making decision for the decision maker without stipulate the decision itself. Decision is made by hum

The Cerebellar Mutism Syndrome : Risk Assessment, Prevention and Treatment

Cerebellar mutism syndrome (CMS) has received increasing attention over the last decades as a complication of posterior fossa tumour surgery in children. Risk factors, aetiological aspects, and treatment measures of the syndrome have been investigated, yet the incidence of CMS remains unchanged. Overall, we are currently able to identify patients at risk, but we are unable to prevent it from occur