Category Archives: PLoS One

The effects of normal aging on multiple aspects of financial decision-making.

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The effects of normal aging on multiple aspects of financial decision-making.
PLoS One. 2017;12(8):e0182620
Authors: Bangma DF, Fuermaier ABM, Tucha L, Tucha O, Koerts J
Abstract
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Electrically controlled cloud of bulk nanobubbles in water solutions.

Electrically controlled cloud of bulk nanobubbles in water solutions.

PLoS One. 2017;12(7):e0181727

Authors: Postnikov AV, Uvarov IV, Lokhanin MV, Svetovoy VB

Abstract
Using different experimental techniques we visualize a cloud of gas in water that is produced electrochemically by the alternating polarity process. Liquid enriched with gas does not contain bubbles strongly scattering visible light but its refractive index changes significantly near the electrodes. The change of the refractive index is a collective effect of bulk nanobubbles with a diameter smaller than 200 nm. Any alternative explanation fails to explain the magnitude of the effect. Spatial structure of the cloud is investigated with the optical lever method. Its dynamics is visualised observing optical distortion of the electrode images or using differential interference contrast method. The cloud covers concentric electrodes, in a steady state it is roughly hemispherical with a size two times larger than the size of the electrode structure. When the electrical pulses are switched off the cloud disappears in less than one second. The total concentration of gases can reach very high value estimated as 3.5 × 1020 cm-3 that corresponds to an effective supersaturation of 500 and 150 for hydrogen and oxygen, respectively.

PMID: 28727812 [PubMed – in process]

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Net profit flow per country from 1980 to 2009: The long-term effects of foreign direct investment.

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Net profit flow per country from 1980 to 2009: The long-term effects of foreign direct investment.
PLoS One. 2017;12(6):e0179244
Authors: Akkermans DHM
Abstract
AIM OF THE PAPER: The p… Continue reading

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An investigation of emotion dynamics in major depressive disorder patients and healthy persons using sparse longitudinal networks.

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An investigation of emotion dynamics in major depressive disorder patients and healthy persons using sparse longitudinal networks.
PLoS One. 2017;12(6):e0178586
Authors: de Vos S, Wardenaar KJ, Bos E… Continue reading

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Characterization of the Paenibacillus beijingensis DSM 24997 GtfD and its glucan polymer products representing a new glycoside hydrolase 70 subfamily of 4,6-α-glucanotransferase enzymes.

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Characterization of the Paenibacillus beijingensis DSM 24997 GtfD and its glucan polymer products representing a new glycoside hydrolase 70 subfamily of 4,6-α-glucanotransferase enzymes.

PLoS One. 2017;12(4):e0172622

Authors: Gangoiti J, Lamothe L, van Leeuwen SS, Vafiadi C, Dijkhuizen L

Abstract
Previously we have reported that the Gram-negative bacterium Azotobacter chroococcum NCIMB 8003 uses the 4,6-α-glucanotransferase GtfD to convert maltodextrins and starch into a reuteran-like polymer consisting of (α1→4) glucan chains connected by alternating (α1→4)/(α1→6) linkages and (α1→4,6) branching points. This enzyme constituted the single evidence for this reaction and product specificity in the GH70 family, mostly containing glucansucrases encoded by lactic acid bacteria (http://www.CAZy.org). In this work, 4 additional GtfD-like proteins were identified in taxonomically diverse plant-associated bacteria forming a new GH70 subfamily with intermediate characteristics between the evolutionary related GH13 and GH70 families. The GtfD enzyme encoded by Paenibacillus beijingensis DSM 24997 was characterized providing the first example of a reuteran-like polymer synthesizing 4,6-α-glucanotransferase in a Gram-positive bacterium. Whereas the A. chroococcum GtfD activity on amylose resulted in the synthesis of a high molecular polymer, in addition to maltose and other small oligosaccharides, two reuteran-like polymer distributions are produced by P. beijingensis GtfD: a high-molecular mass polymer and a low-molecular mass polymer with an average Mw of 27 MDa and 19 kDa, respectively. Compared to the A. chroooccum GtfD product, both P. beijingensis GtfD polymers contain longer linear (α1→4) sequences in their structure reflecting a preference for transfer of even longer glucan chains by this enzyme. Overall, this study provides new insights into the evolutionary history of GH70 enzymes, and enlarges the diversity of natural enzymes that can be applied for modification of the starch present in food into less and/or more slowly digestible carbohydrate structures.

PMID: 28399167 [PubMed – in process]

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Flavor pleasantness processing in the ventral emotion network.

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Flavor pleasantness processing in the ventral emotion network.
PLoS One. 2017;12(2):e0170310
Authors: Dalenberg JR, Weitkamp L, Renken RJ, Nanetti L, Ter Horst GJ
Abstract
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Retro-Active Emotion: Do Negative Emotional Stimuli Disrupt Consolidation in Working Memory?

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Retro-Active Emotion: Do Negative Emotional Stimuli Disrupt Consolidation in Working Memory?

PLoS One. 2017;12(1):e0169927

Authors: Kandemir G, Akyürek EG, Nieuwenstein MR

Abstract
While many studies have shown that a task-irrelevant emotionally arousing stimulus can interfere with the processing of a shortly following target, it remains unclear whether an emotional stimulus can also retro-actively interrupt the ongoing processing of an earlier target. In two experiments, we examined whether the presentation of a negative emotionally arousing picture can disrupt working memory consolidation of a preceding visual target. In both experiments, the effects of negative emotional pictures were compared with the effects of neutral pictures. In Experiment 1, the pictures were entirely task-irrelevant whereas in Experiment 2 the pictures were associated with a 2-alternative forced choice task that required participants to respond to the color of a frame surrounding the pictures. The results showed that the appearance of the pictures did not interfere with target consolidation when the pictures were task-irrelevant, whereas such interference was observed when the pictures were associated with a 2-AFC task. Most importantly, however, the results showed no effects of whether the picture had neutral or emotional content. Implications for further research are discussed.

PMID: 28103267 [PubMed – in process]

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My Body Looks Like That Girl’s: Body Mass Index Modulates Brain Activity during Body Image Self-Reflection among Young Women.

My Body Looks Like That Girl’s: Body Mass Index Modulates Brain Activity during Body Image Self-Reflection among Young Women.

PLoS One. 2016;11(10):e0164450

Authors: Gao X, Deng X, Wen X, She Y, Vinke PC, Chen H

Abstract
Body image distress or body dissatisfaction is one of the most common consequences of obesity and overweight. We investigated the neural bases of body image processing in overweight and average weight young women to understand whether brain regions that were previously found to be involved in processing self-reflective, perspective and affective components of body image would show different activation between two groups. Thirteen overweight (O-W group, age = 20.31±1.70 years) and thirteen average weight (A-W group, age = 20.15±1.62 years) young women underwent functional magnetic resonance imaging while performing a body image self-reflection task. Among both groups, whole-brain analysis revealed activations of a brain network related to perceptive and affective components of body image processing. ROI analysis showed a main effect of group in ACC as well as a group by condition interaction within bilateral EBA, bilateral FBA, right IPL, bilateral DLPFC, left amygdala and left MPFC. For the A-W group, simple effect analysis revealed stronger activations in Thin-Control compared to Fat-Control condition within regions related to perceptive (including bilateral EBA, bilateral FBA, right IPL) and affective components of body image processing (including bilateral DLPFC, left amygdala), as well as self-reference (left MPFC). The O-W group only showed stronger activations in Fat-Control than in Thin-Control condition within regions related to the perceptive component of body image processing (including left EBA and left FBA). Path analysis showed that in the Fat-Thin contrast, body dissatisfaction completely mediated the group difference in brain response in left amygdala across the whole sample. Our data are the first to demonstrate differences in brain response to body pictures between average weight and overweight young females involved in a body image self-reflection task. These results provide insights for understanding the vulnerability to body image distress among overweight or obese young females.

PMID: 27764116 [PubMed – in process]

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Do Resit Exams Promote Lower Investments of Study Time? Theory and Data from a Laboratory Study.

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Do Resit Exams Promote Lower Investments of Study Time? Theory and Data from a Laboratory Study.
PLoS One. 2016;11(10):e0161708
Authors: Nijenkamp R, Nieuwenstein MR, de Jong R, Lorist MM
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Imagery Rescripting: The Impact of Conceptual and Perceptual Changes on Aversive Autobiographical Memories.

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Imagery Rescripting: The Impact of Conceptual and Perceptual Changes on Aversive Autobiographical Memories.
PLoS One. 2016;11(8):e0160235
Authors: Slofstra C, Nauta MH, Holmes EA, Bockting CL
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The Facial Appearance of CEOs: Faces Signal Selection but Not Performance.

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The Facial Appearance of CEOs: Faces Signal Selection but Not Performance.
PLoS One. 2016;11(7):e0159950
Authors: Stoker JI, Garretsen H, Spreeuwers LJ
Abstract
Research overwhelmingly… Continue reading

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Discrepancy and Disliking Do Not Induce Negative Opinion Shifts.

Discrepancy and Disliking Do Not Induce Negative Opinion Shifts.

PLoS One. 2016;11(6):e0157948

Authors: Takács K, Flache A, Mäs M

Abstract
Both classical social psychological theories and recent formal models of opinion differentiation and bi-polarization assign a prominent role to negative social influence. Negative influence is defined as shifts away from the opinion of others and hypothesized to be induced by discrepancy with or disliking of the source of influence. There is strong empirical support for the presence of positive social influence (a shift towards the opinion of others), but evidence that large opinion differences or disliking could trigger negative shifts is mixed. We examine positive and negative influence with controlled exposure to opinions of other individuals in one experiment and with opinion exchange in another study. Results confirm that similarities induce attraction, but results do not support that discrepancy or disliking entails negative influence. Instead, our findings suggest a robust positive linear relationship between opinion distance and opinion shifts.

PMID: 27333160 [PubMed – as supplied by publisher]

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Deficits in Degraded Facial Affect Labeling in Schizophrenia and Borderline Personality Disorder.

Deficits in Degraded Facial Affect Labeling in Schizophrenia and Borderline Personality Disorder.
PLoS One. 2016;11(6):e0154145
Authors: van Dijke A, van ‘t Wout M, Ford JD, Aleman A
Abstract
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Strict Selection Alone of Patients Undergoing Liver Transplantation for Hilar Cholangiocarcinoma Is Associated with Improved Survival.

Strict Selection Alone of Patients Undergoing Liver Transplantation for Hilar Cholangiocarcinoma Is Associated with Improved Survival.

PLoS One. 2016;11(6):e0156127

Authors: Mantel HT, Westerkamp AC, Adam R, Bennet WF, Seehofer D, Settmacher U, Sánchez-Bueno F, Fabregat Prous J, Boleslawski E, Friman S, Porte RJ, European Liver and Intestine Transplant Association (ELITA)

Abstract
Liver transplantation for hilar cholangiocarcinoma (hCCA) has regained attention since the Mayo Clinic reported their favorable results with the use of a neo-adjuvant chemoradiation protocol. However, debate remains whether the success of the protocol should be attributed to the neo-adjuvant therapy or to the strict selection criteria that are being applied. The aim of this study was to investigate the value of patient selection alone on the outcome of liver transplantation for hCCA. In this retrospective study, patients that were transplanted for hCCA between1990 and 2010 in Europe were identified using the European Liver Transplant Registry (ELTR). Twenty-one centers reported 173 patients (69%) of a total of 249 patients in the ELTR. Twenty-six patients were wrongly coded, resulting in a study group of 147 patients. We identified 28 patients (19%) who met the strict selection criteria of the Mayo Clinic protocol, but had not undergone neo-adjuvant chemoradiation therapy. Five-year survival in this subgroup was 59%, which is comparable to patients with pretreatment pathological confirmed hCCA that were transplanted after completion of the chemoradiation protocol at the Mayo Clinic. In conclusion, although the results should be cautiously interpreted, this study suggests that with strict selection alone, improved survival after transplantation can be achieved, approaching the Mayo Clinic experience.

PMID: 27276221 [PubMed – as supplied by publisher]

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Predicting Performance in Higher Education Using Proximal Predictors.

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Predicting Performance in Higher Education Using Proximal Predictors.

PLoS One. 2016;11(4):e0153663

Authors: Niessen AS, Meijer RR, Tendeiro JN

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Relationship of 5-HTTLPR Polymorphism with Various Factors of Pain Processing: Subjective Experience, Motor Responsiveness and Catastrophizing.

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Relationship of 5-HTTLPR Polymorphism with Various Factors of Pain Processing: Subjective Experience, Motor Responsiveness and Catastrophizing.

PLoS One….

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Social Use of Facial Expressions in Hylobatids.

Social Use of Facial Expressions in Hylobatids.

PLoS One. 2016;11(3):e0151733

Authors: Scheider L, Waller BM, Oña L, Burrows AM, Liebal K

Abstract
Non-human primates use various communicative means in interactions with others. While primate gestures are commonly considered to be intentionally and flexibly used signals, facial expressions are often referred to as inflexible, automatic expressions of affective internal states. To explore whether and how non-human primates use facial expressions in specific communicative interactions, we studied five species of small apes (gibbons) by employing a newly established Facial Action Coding System for hylobatid species (GibbonFACS). We found that, despite individuals often being in close proximity to each other, in social (as opposed to non-social contexts) the duration of facial expressions was significantly longer when gibbons were facing another individual compared to non-facing situations. Social contexts included grooming, agonistic interactions and play, whereas non-social contexts included resting and self-grooming. Additionally, gibbons used facial expressions while facing another individual more often in social contexts than non-social contexts where facial expressions were produced regardless of the attentional state of the partner. Also, facial expressions were more likely ‘responded to’ by the partner’s facial expressions when facing another individual than non-facing. Taken together, our results indicate that gibbons use their facial expressions differentially depending on the social context and are able to use them in a directed way in communicative interactions with other conspecifics.

PMID: 26978660 [PubMed – as supplied by publisher]

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Effects of Oxygen Limitation on the Biosynthesis of Photo Pigments in the Red Microalgae Galdieria sulphuraria Strain 074G.

Effects of Oxygen Limitation on the Biosynthesis of Photo Pigments in the Red Microalgae Galdieria sulphuraria Strain 074G.

PLoS One. 2016;11(2):e0148358

Authors: Sarian…

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Optimising Extinction of Conditioned Disgust.

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Optimising Extinction of Conditioned Disgust.

PLoS One. 2016;11(2):e0148626

Authors: Bosman RC, Borg C, de Jong PJ

Abstract

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Vision-Related Quality of Life in Patients with Inactive HLA-B27-Associated-Spectrum Anterior Uveitis.

Vision-Related Quality of Life in Patients with Inactive HLA-B27-Associated-Spectrum Anterior Uveitis.

PLoS One. 2016;11(1):e0146956

Authors: Hoeksema L, Los LI

Abstract
We investigated the vision-related quality of life (VR-QOL) in patients with HLA-B27 associated anterior uveitis (AU). The study was conducted in 2012 at the ophthalmology department of the University Medical Center of Groningen. We included AU patients who were HLA-B27 positive and/or were diagnosed by a rheumatologist with an HLA-B27 associated systemic disease. Sixty-one of 123 (50%) adult patients participated. All patients filled-out the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25), Beck Depression Inventory (BDI-II), social support lists and an additional questionnaire for gathering general information. Medical records were reviewed for clinical characteristics. Analyses were conducted on various patient and ocular characteristics. We compared our NEI VFQ-25 scores with those previously found in the literature. Our main outcome measures were VR-QOL scores and their associations with various general patient and ocular characteristics. We found that the NEI VFQ-25 mean overall composite score was 88.9±8.8, which is relatively high, but lower than that found in a normal working population. The mean general health score was 47.4±20.8, which is lower than in patients with other ocular diseases. Patients with a systemic disease scored significantly lower on general health and VR-QOL, compared to patients without a systemic disease. Patients with a depression (6/59 (10%)) frequently had ankylosing spondylitis (5/6 patients) and they scored significantly worse on VR-QOL. We concluded that patients with HLA-B27 associated AU have a relatively high VR-QOL. However, the presence of a systemic disease is associated with lower VR-QOL and general health scores. In addition, depression is associated with a lower VR-QOL.

PMID: 26808922 [PubMed – as supplied by publisher]

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