Search results for "Placement"
showing 10 items of 1142 documents
Ecological and evolutionary consequences of selective interspecific information use
2023
Recent work has shown that animals frequently use social information from individuals of their own species as well as from other species; however, the ecological and evolutionary consequences of this social information use remain poorly understood. Additionally, information users may be selective in their social information use, deciding from whom and how to use information, but this has been overlooked in an interspecific context. In particular, the intentional decision to reject a behaviour observed via social information has received less attention, although recent work has indicated its presence in various taxa. Based on existing literature, we explore in which circumstances selective i…
Monitoring of Enzyme Substitution Using the Cholesteryl Octanoate Breath Test
1991
The efficiency of enzyme replacement therapy in pancreatic insufficiency is usually judged on the grounds of clinical improvement and the effect on steatorrhea: treatment is thought to be successful if steatorrhea is abolished or, at least, reduced. In the majority of patients, the amount of enzyme necessary to alleviate steatorrhea can be reduced if lipase is protected against acidic inactivation either by blocking H2 secretion of the stomach or by protecting enzymes by pH-sensitive enteric coating. However, steatorrhea is frequently not abolished and a differential treatment may be necessary in each patient.
The protein dynamical transition does not require the protein polypeptide chain
2011
We give experimental evidence that the main features of protein dynamics revealed by neutron scattering, i.e., the “protein dynamical transition” and the “boson peak”, do not need the protein polypeptide chain. We show that a rapid increase of hydrogen atoms fluctuations at about 220 K, analogous to the one observed in hydrated myoglobin powders, is also observed in a hydrated amino acids mixture with the chemical composition of myoglobin but lacking the polypeptide chain; in agreement with the protein behavior, the transition is abolished in the dry mixture. Further, an excess of low-frequency vibrational modes around 3 meV, typically observed in protein powders, is also observed in our mi…
Grafted polymer layers under variable solvent conditions: A Monte Carlo simulation
1993
Polymer chains anchored with one end at a hard wall under variable solvent conditions are investigated by Monte Carlo simulations using the bond- fluctuation model. Detail information on the structural properties are obtained above, at, and below the Θ-point and discussed in terms of the appropriate theories. In particular, the scaling of the brush thickness is formulated and verified by the simulation data. For the dynamics at the Θ-point, both the relaxation time of the chain configuration and the mean-square time displacement are studied. At temperatures distinctly below the Θ-point, we find that the layer develops considerable lateral inhomogeneity in its density, which has not been pre…
Crystal structure of the bifunctional soybean Bowman-Birk inhibitor at 0.28-nm resolution. Structural peculiarities in a folded protein conformation.
1996
The Bowman-Birk inhibitor from soybean is a small protein that contains a binary arrangement of trypsin-reactive and chymotrypsin-reactive subdomains. In this report, the crystal structure of this anticarcinogenic protein has been determined to 0.28-nm resolution by molecular replacement from crystals grown at neutral pH. The crystal structure differs from a previously determined NMR structure [Werner, M. H. & Wemmer, D. E. (1992) Biochemistry 31, 999-1010] in the relative orientation of the two enzyme-insertion loops, in some details of the main chain trace, in the presence of favourable contacts in the trypsin-insertion loop, and in the orientation of several amino acid side chains. The p…
Anomalous diffusion in polymer melts
2002
Abstract We present a study of the anomalous diffusion regimes in polymer melt dynamics performing a Monte Carlo (MC) simulation of the bond-fluctuation lattice model. Special emphasis is laid on the crossover from a Rouse-like motion to the behavior predicted by reptation theory. For the longest chains of N=400 the high statistical accuracy of the data allows for clear identification of the subdiffusive regimes in the center of mass motion and the monomer displacement. They are well compatible with those predicted by reptation theory. Furthermore a detailed analysis of the different short time anomalous diffusion regimes in the melt dynamics of polymer chains is presented and it is shown t…
Static and dynamic scaling behavior of a polymer melt model with triple-well bending potential
2018
We perform molecular-dynamics simulations for polymer melts of the coarse-grained polyvinyl alcohol model that crystallizes upon slow cooling. To establish the properties of its high temperature liquid state as a reference point, we characterize in detail the structural features of equilibrated polymer melts with chain lengths $5\le N \le 1000$ at a temperature slightly above their crystallization temperature. We find that the conformations of sufficiently long polymers with $N >50$ obey essentially the Flory's ideality hypothesis. The chain length dependence of the end-to-end distance and the gyration radius follow the scaling predictions of ideal chains and the probability distributions o…
Klīnisko rezultātu novērtēšana pēc ceļa locītavu endoprotezēšanas
2016
Novecojušā sabiedrībā ar pieaugošo dzīves ilgumu, pieaug arī pieprasījums pēc pilnīgas ceļa locītavas aizvietošanas. Tajā pašā laikā cilvēki sešdesmit un septiņdesmit gadu vecumā ir daudz aktīvāki kā iepriekšējā paaudze un prasīgāki attiecībā uz mobilitāti. Klīniskais iznākums pilnīgai ceļa locītavas aizvietošanai ir mainīgs, jo viens no pieciem pacientiem nav apmierināts pēc operācijas. Ir vairāki gan ar pacientu saistīti, gan ar veselības aprūpi saistīti faktori, kas ietekmē pilnīgas ceļa locītavas aizvietošanas iznākumu. Mērķis ir apskatīt publicēto literatūru un parādīt gan ar pacientu, gan ar veselības aprūpi saistītos faktorus, kas ietekmē pilnīgas ceļa locītas aizvietošanas iznākumu.
Improving quality in clinical placement studies in nursing homes (QUALinCLINstud):the study protocol of a participatory mixed methods multiple case s…
2020
IntroductionImproved quality in clinical supervision and assessment of student nurses in nursing home clinical placements is vitally important to effective recruitment and preparation for this healthcare sector. Knowledge regarding supervision and assessment practices within these settings is limited. Also, knowledge of evolving e-learning tools on the quality and effectiveness of these educational practices seems to be absent.Methods and analysisThe aim of the “Improving quality in clinical placement studies in nursing homes” (QUALinCLINstud) study is to develop and evaluate how a web-based programme can optimise supervision, assessment and learning during nursing home placements. The stud…
A new replacement name for the fossil spider Veterator Petrunkevitch, 1963 (Arthropoda: Arachnida: Araneae)
2021
A junior homonym was detected in the genera of fossil Araneae and the following replacement name is proposed within the family Trochanteriidae: Neoveterator Ceccolini & Cianferoni nom. nov. pro Veterator Petrunkevitch, 1963 nec Laws, 1944. Eight new combinations (comb. nov.) are proposed.