Search results for "Physical separation"

Effects of maternal singing during kangaroo care on maternal anxiety, wellbeing, and mother-infant relationship after preterm birth: a mixed methods …

2020

Introduction: Preterm birth may disturb the typical development of the mother– infant relationship, when physical separation and emotional distress in the neonatal intensive care unit may increase maternal anxiety and create challenges for early interaction. This cluster-randomized controlled trial examined the effects of maternal singing during kangaroo care on mothers’ anxiety, wellbeing, and the early mother– infant relationship after preterm birth. Method: In the singing intervention group, a certified music therapist guided the mothers (n = 24) to sing or hum during daily kangaroo care during 33–40 gestational weeks (GW). In the control group, the mothers (n = 12) conducted daily kanga…

Large scale fractionation of pullulan and dextran

2006

Abstract A recently developed large scale fractionation technique named continuous spin fractionation (CSF) was applied to fractionate pullulan and dextran. 450 g of pullulan with a broad molecular weight distribution were fractionated using water as solvent and acetone as precipitant. In this study, we have in five CSF runs prepared three fractions with apparent M ¯ w * values ranging from 17.6 to 413 kg mol−1. Seventy grams of dextran were fractionated with a mixed solvent of water plus methanol. Five fractionation steps resulted in four samples with M ¯ w values between 4.36 and 18.2 kg mol−1.

Gelchromatographie, die möglichkeiten verschiedener trennmaterialien

1968

Zur Gelchromatographie lassen sich organische und anorganische Trennmaterialien verwenden. Das reprasentative hochvernetzte Styragel wird benutzt, um vergleichende Untersuchungen mit porosen und Stoffen auf der Basis von Silicium und Aluminium auszufuhren. Fur die Trennung sehr hochmolekularer Substanzen, die Gele groser Porenweite erfordern, sind die anorganischen Gele wegen ihrer hohen mechanischen Stabilitat besonders geeignet. Fur Substanzen mit niedrigem Molekulargewicht sind organische und anorganische Trennstoffe hafig etwa gleich gut verwendbar, so das man den Geltyp wahlen kann, der moglichst nur hydrodynamische und keine chemische Wechselwirkung mit der Substanz zeigt. Organic and…

Inverse Spin Fractionation:  a Tool to Fractionate Sodium Hyaluronate

2006

Intraperitoneal adhesions-an ongoing challenge between biomedical engineering and the life sciences

2011

Peritoneal adhesions remain a relevant clinical problem despite the currently available prophylactic barrier materials. So far, the physical separation of traumatized serosa areas using barriers represents the most important clinical strategy for adhesion prevention. However, the optimal material has not yet been found. Further optimization or pharmacological functionalization of these barriers could give an innovative input for peritoneal adhesion prevention. Therefore, a more complete understanding of pathogenesis is required. On the basis of the pathophysiology of adhesion formation the main barriers currently in clinical practice as well as new innovations are discussed in the present r…

1995

45 g of poly(acrylic acid) (PAA 500) with a trimodal molar mass distribution (Mw = 500 kg/mol, (Mw/Mn) −1 = 2.33) were fractionated by means of CPF (continuous polymer fractionation) in two steps using 1,4-dioxane as solvent. The counter-current extraction was performed in a glass column (length: 190 cm, diameter: 1.5 cm) filled with a network of wires, introducing the feed 75 cm from its upper end. The distribution of the highest molar mass fraction (Mw = 760 kg/mol) is unimodal and comparatively narrow ((Mw/Mn) −1 = 0.66). Indications exits that fractionation is not only taking place with respect to molar mass but also with respect to tacticity. Mit Hilfe der kontinuierlichen Polymerfrakt…