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Onder poeder lassen

Voor u ligt de voorlichtingspublicatie "Onder poeder lassen". Dit blad is een update van het NIL-voorlichtingsblad "Onder poeder lassen" dat in 1988 is opgesteld als onderdeel van het gelijknamige onderzoeksproject dat uitgevoerd is onder supervisie van het Nederlands Instituut voor Lastechniek. Daar er in de periode tussen verschijning van de eerste uitgave en nu een aantal belangrijke ontwikkelingen op het gebied van het onder poeder lassen is geweest, was een aanpassing aan de huidige stand der techniek noodzakelijk. De Nederlandse overheid heeft geld ter beschikking gesteld om een aantal verouderde voorlichtingspublicaties aan te passen aan de stand der techniek; de FME heeft de coördinatie daarvan op zich genomen. Voor de aanpassing van deze publicatie heeft zij het NIL de opdracht gegeven. De oude voorlichtingspublicatie vormt de basis van deze update, zodat verwijzingen naar geraadpleegde literatuur aanvullend aan de oude publicatie zijn.

Social media voor een gezonde mond

Uit het artikel: "Social media zijn alle internettoepassingen waarmee het mogelijk is om informatie met elkaar te delen op een gebruiksvriendelijke en aantrekkelijke wijze. Niet alleen informatie in de vorm van tekst, maar ook geluid en beeld worden gedeeld via social media websites. Bekende voorbeelden zijn Facebook, Hyves, YouTube, Flickr, LinkedIn en Twitter. Onderzoekers van de Universiteit Twente gaan in opdracht van het Ivoren Kruis interviews houden bij dentale praktijken. Met uw kennis en mening worden vervolgens nieuwe methoden ontwikkeld voortoepassing van social media voor het bevorderen van mondgezondheid bij uw patiënten."

Challenges and experiences in implementation of an individual prevention program based on Nexø model

Oral Health Coaches at Well-Baby Clinics to Promote Oral Health in Preschool Children From the First Erupted Tooth

Background: Early childhood caries is considered one of the most prevalent diseases in childhood, affecting almost half of preschool-age children globally. In the Netherlands, approximately one-third of children aged 5 years already have dental caries, and dental care providers experience problems reaching out to these children. Objective: Within the proposed trial, we aim to test the hypothesis that, compared to children who receive usual care, children who receive the Toddler Oral Health Intervention as add-on care will have a reduced cumulative caries incidence and caries incidence density at the age of 48 months. Methods: This pragmatic, 2-arm, individually randomized controlled trial is being conducted in the Netherlands and has been approved by the Medical Ethics Research Board of University Medical Center Utrecht. Parents with children aged 6 to 12 months attending 1 of the 9 selected well-baby clinics are invited to participate. Only healthy children (ie, not requiring any form of specialized health care) with parents that have sufficient command of the Dutch language and have no plans to move outside the well-baby clinic region are eligible. Both groups receive conventional oral health education in well-baby clinics during regular well-baby clinic visits between the ages of 6 to 48 months. After concealed random allocation of interventions, the intervention group also receives the Toddler Oral Health Intervention from an oral health coach. The Toddler Oral Health Intervention combines behavioral interventions of proven effectiveness in caries prevention. Data are collected at baseline, at 24 months, and at 48 months. The primary study endpoint is cumulative caries incidence for children aged 48 months, and will be analyzed according to the intention-to-treat principle. For children aged 48 months, the balance between costs and effects of the Toddler Oral Health Intervention will be evaluated, and for children aged 24 months, the effects of the Toddler Oral Health Intervention on behavioral determinants, alongside cumulative caries incidence, will be compared. Results: The first parent-child dyads were enrolled in June 2017, and recruitment was finished in June 2019. We enrolled 402 parent-child dyads. Conclusions: All follow-up interventions and data collection will be completed by the end of 2022, and the trial results are expected soon thereafter. Results will be shared at international conferences and via peer-reviewed publication.

Process for preparing chain-extended starch

Chain-extended starch is prepd. in that starch is polymd. in an aq. soln. at pH 6.0-8.3 by means of glucosyl fluoride in the presence of inorg. phosphate, sucrose phosphorylase, and potato phosphorylase. [on SciFinder(R)]

Synthesis of α- and β-D-glucopyranuronate 1-phosphate and α-D-glucopyranuronate 1-fluoride: intermediates in the synthesis of D-glucuronic acid from starch

The title uronates were prepared by 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) catalysed sodium hypochlorite oxidation of α- and β-D-glucopyranosylphosphate (α-/β-Glc-1-P) and α-D-glucopyranosyl fluoride (α-Glc-1-F). Quantitative recovery of the TEMPO catalyst was achieved by azeotropic distillation of a small part of the reaction mixture. Also, a heterogeneous catalyst system was prepared by immobilisation of 4-oxo-tetramethyl-1-piperidinyloxy (OTEMPO) on amino-functionalized silica. The protected uronates were hydrolysed to yield D-glucuronate. Since α- and β-Glc-1-P and α-Glc-1-F can be obtained from starch in one step, D-glucuronic acid is now available from starch in a convenient three-step sequence.