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https://www.readbyqxmd.com/read/28092263/transcription-leads-to-pervasive-replisome-instability-in-bacteria
#1
Sarah Mangiameli, Christopher N Merrikh, Paul A Wiggins, Houra Merrikh
The canonical model of DNA replication describes a highly-processive and largely continuous process by which the genome is duplicated. This continuous model is based upon in vitro reconstitution and in vivo ensemble experiments. Here, we characterize the replisome-complex stoichiometry and dynamics with single-molecule resolution in bacterial cells. Strikingly, the stoichiometries of the replicative helicase, DNA polymerase, and clamp loader complexes are consistent with the presence of only one active replisome in a significant fraction of cells (>40%)...
January 16, 2017: ELife
https://www.readbyqxmd.com/read/28080081/the-heart-of-parenting-parent-hr-dynamics-and-negative-parenting-while-resolving-conflict-with-child
#2
Xutong Zhang, Lixian Cui, Zhuo Rachel Han, Jia Yan
The current study examined parent heart rate (HR) dynamic changing patterns and their links to observed negative parenting (i.e., emotional unavailability and psychological control) during a parent-child conflict resolution task among 150 parent-child dyads (child age ranged from 6 to 12 years, Mage = 8.54 ± 1.67). Parent HR was obtained from electrocardiogram (ECG) data collected during the parent-child conflict resolution task. Negative parenting was coded offline based on the video recording of the same task...
January 12, 2017: Journal of Family Psychology: JFP
https://www.readbyqxmd.com/read/28075708/conflict-resolution-in-chinese-adolescents-friendship-links-with-regulatory-focus-and-friendship-satisfaction
#3
Qin Gao, Ran Bian, Ru-de Liu, Yili He, Tian-Po Oei
It is generally acknowledged that people adopt different resolution strategies when facing conflicts with others. However, the mechanisms of conflict resolution are still unclear and under researched, in particular within the context of Chinese adolescents' same-sex friendship relations. Thus, the present study investigated the mediator role of conflict resolution strategies in the relationship between regulatory foci and friendship satisfaction for the first time. 653 Chinese adolescents completed the regulatory foci, conflict resolution style, and friendship satisfaction measures...
January 11, 2017: Journal of Psychology
https://www.readbyqxmd.com/read/28068768/proton-wire-dynamics-in-the-green-fluorescent-protein
#4
Ai Shinobu, Noam Agmon
Inside proteins, protons move on proton wires (PWs). Starting from the highest resolution X-ray structure available, we conduct a 306 ns molecular dynamics simulation of the (A-state) wild-type (wt) green fluorescent protein (GFP) to study how its PWs change with time. We find that the PW from the chromophore via Ser205 to Glu222, observed in all X-ray structures, undergoes rapid water molecule insertion between Ser205 and Glu222. Sometimes, an alternate Ser205-bypassing PW exists. Side chain rotations of Thr203 and Ser205 play an important role in shaping the PW network in the chromophore region...
January 10, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28065775/group-focused-morality-is-associated-with-limited-conflict-detection-and-resolution-capacity-neuroanatomical-evidence
#5
Kyle Nash, Thomas Baumgartner, Daria Knoch
Group-focused moral foundations (GMFs) - moral values that help protect the group's welfare - sharply divide conservatives from liberals and religiously devout from non-believers. However, there is little evidence about what drives this divide. Moral foundations theory and the model of motivated social cognition both associate group-focused moral foundations with differences in conflict detection and resolution capacity, but in opposing directions. Individual differences in conflict detection and resolution implicate specific neuroanatomical differences...
January 5, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28060126/pediatric-acquired-von-willebrand-syndrome-in-cardiopulmonary-disorders-do-laboratory-abnormalities-predict-bleeding-risk
#6
Saman K Hashmi, Mireya P Velasquez, Donald L Yee, Shiu-Ki Hui, Donald Mahoney, Lakshmi V Srivaths
There are conflicting reports on whether or not laboratory abnormalities in pediatric acquired von Willebrand syndrome (AVWS) predict bleeding manifestations in patients with cardiopulmonary disorders (CPD). We retrospectively reviewed charts of patients with AVWS and CPD (n=16) seen at Texas Children's Hospital from 2003 to 2012. The most common CPD were valve stenoses, ventricular septal defects, and pulmonary hypertension. All patients had loss of high molecular weight multimers. Fifteen (94%) patients presented with bleeding symptoms, with menorrhagia and epistaxis being the most common...
January 5, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28057516/social-motivation-and-conflict-resolution-tactics-as-potential-building-blocks-of-sociality-in-cichlid-fishes
#7
REVIEW
Sigal Balshine, Marian Y L Wong, Adam R Reddon
Even closely related and ecologically similar cichlid species of Lake Tanganyika exhibit an impressive diversity of social systems, and therefore these fishes offer an excellent opportunity to examine the evolution of social behaviour. Sophisticated social relationships are thought to have evolved via a building block design where more fundamental social behaviours and cognitive processes have been combined, incrementally modified, and elaborated over time. Here, we studied two of these putative social building blocks in two closely related species of cichlids: Neolamprologus pulcher a group-living species, and Telmatochromis temporalis, a non-grouping species...
January 2, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28053945/treatment-of-leukocytospermia-in-male-infertility-a-systematic-review
#8
REVIEW
Jae Hung Jung, Myung Ha Kim, Jiye Kim, Soon Koo Baik, Sang-Baek Koh, Hyun Jun Park, Ju Tae Seo
Male factors account for 20% to 50% of infertility cases, and infection in the genitourinary tract may play a contributing role in up to 15% of male infertility. Leukocytospermia is a well-known indicator of infection or inflammation in the male sex glands and the urogenital tract. Although great deal of effort has been expended to elucidate definite management strategies in infertile men with leukocytospermia, the gold standard of treatment remains unclear. Until recently, broad spectrum antibiotics and antioxidants have been used in the treatment of leukocytospermia for male infertility to eliminate infection and reduce reactive oxygen free radicals produced inside cellular mitochondria as a result of inflammation...
December 2016: World Journal of Men's Health
https://www.readbyqxmd.com/read/28048364/we-fg-207a-01-introduction-to-dedicated-breast-ct-early-studies
#9
S Vedantham
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048098/su-f-j-67-dosimetric-changes-during-radiotherapy-in-lung-cancer-patients-with-atelectasis
#10
C Guy, E Weiss, N Jan, L Reshko, G Christensen, G Hugo
PURPOSE: Large geometric changes which occur during thoracic radiotherapy alter normal anatomy and target position and may induce clinically important dose changes. This study investigates variation of organ-at-risk (OAR) dose caused by atelectasis resolution during radiotherapy. METHODS: 3D IMRT treatment plans were obtained for 14 non-small-cell lung cancer patients. Dose of the clinical plan was recalculated on a baseline scan in which lung was collapsed and on a midtreatment scan in which lung re-aeration had occurred...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047717/we-fg-207a-02-why-we-need-breast-ct-clinical-perspective
#11
A O'Connell
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047520/we-fg-207a-05-dedicated-breast-ct-as-a-diagnostic-imaging-tool-physics-and-clinical-feasibility
#12
A Karellas
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047068/we-fg-207a-03-low-dose-cone-beam-breast-ct-physics-and-technology-development
#13
J Boone
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047044/th-cd-207b-03-how-to-quantify-temporal-resolution-in-x-ray-mdct-imaging
#14
A Budde, Y Li, J Hsieh, G Chen
PURPOSE: In modern CT scanners, a quantitative metric to assess temporal response, namely, to quantify the temporal resolution (TR), remains elusive. Rough surrogate metrics, such as half of the gantry rotation time for single source CT, a quarter of the gantry rotation time for dual source CT, or measurements of motion artifact's size, shape, or intensity have previously been used. In this work, a rigorous framework which quantifies TR and a practical measurement method are developed...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046769/su-g-iep4-15-ultrasound-imaging-of-absorbable-inferior-vena-cava-filters-for-proper-placement
#15
T Mitcham, R Bouchard, A Melancon, M Eggers, M Melancon
PURPOSE: Inferior vena cava filters (IVCFs) are used in patients with a high risk of pulmonary embolism in situations when the use of blood thinning drugs would be inappropriate. These filters are implanted under x-ray guidance; however, this provides a dose of ionizing radiation to both patient and physician. B-mode ultrasound (US) imaging allows for localization of certain implanted devices without radiation dose concerns. The goal of this study was to investigate the feasibility of imaging the placement of absorbable IVCFs using US imaging to alleviate the dosage concern inherent to fluoroscopy...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046408/we-fg-207a-04-performance-characteristics-of-photon-counting-breast-ct
#16
W Kalender
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046291/we-fg-207a-00-advances-in-dedicated-breast-ct
#17
Srinivasan Vedantham, Sabee Molloi
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042043/first-plastid-phylogenomic-study-reveals-potential-cyto-nuclear-discordance-in-the-evolutionary-history-of-ficus-l-moraceae
#18
Sam Bruun-Lund, Wendy L Clement, Finn Kjellberg, Nina Rønsted
Standard Sanger chloroplast markers provide limited information to resolve species level relationships within plants, in particular within large genera. Figs (Ficus L., Moraceae) compose one of the 50 largest genera of angiosperms with ∼750 species occurring in the tropics and subtropics worldwide. Figs, in addition to being a keystone food resource in rainforests, are well-known for the mutualistic interactions with their pollinating wasps. It is regarded as a model system for understanding co-evolution dating back more than 75million years...
December 29, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28033346/improving-phylogeny-reconstruction-at-the-strain-level-using-peptidome-datasets
#19
Aitor Blanco-Míguez, Jan P Meier-Kolthoff, Alberto Gutiérrez-Jácome, Markus Göker, Florentino Fdez-Riverola, Borja Sánchez, Anália Lourenço
Typical bacterial strain differentiation methods are often challenged by high genetic similarity between strains. To address this problem, we introduce a novel in silico peptide fingerprinting method based on conventional wet-lab protocols that enables the identification of potential strain-specific peptides. These can be further investigated using in vitro approaches, laying a foundation for the development of biomarker detection and application-specific methods. This novel method aims at reducing large amounts of comparative peptide data to binary matrices while maintaining a high phylogenetic resolution...
December 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/28032306/the-efficacy-of-an-american-indian-culturally-based-risk-prevention-program-for-upper-elementary-school-youth-residing-on-the-northern-plains-reservations
#20
John J Usera
Culturally-based risk behavior prevention programs for American Indian elementary school children are sparse. Thus a group of American Indian educators collaborated in the creation of a program that helps children make healthy decisions based on their cultural and traditional value system. In this paper the effectiveness of Lakota Circles of Hope (LCH), an elementary school culturally-based prevention program was studied and evaluated. Three cohorts of fourth and fifth graders participated in a mixed methods quasi-experimental evaluative research design that included focus groups and surveys prior to and following the intervention...
December 29, 2016: Journal of Primary Prevention
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