bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acoustic‐based estimates of Cuvier's beaked whale (Ziphius cavirostris) density and abundance along the U.S. West Coast from drifting hydrophone recorders
Authors: Barlow Jay , Moore Jeffrey E. , McCullough Jennifer L. K. , Griffiths Emily T. 
Published: September 2021

AbstractAn acoustic survey of Cuvier's beaked whales (Ziphius cavirostris) was conducted off the U.S. West Coast in August and September 2016 using drifting recorder systems with a vertical array of two hydrophones at a depth of ~110 m. Recorders were deployed 22 times to representatively cover a 1,058,000 km2study area from the shelf break to ~556 km offshore. Vertical angles to echolocation pulses were measured using the signal time‐difference‐of‐arrival on the two hydrophones. Echolocation pulses of Cuvier's beaked whales were identified from their arrival angles (always from below the array) and unique acoustic characteristics. The density and abundance of Cuvier's beaked whales were estimated using a group‐based point‐transect analysis with 2 min time snapshots. The area effectively surveyed was estimated using a maximum simulated likelihood approach to fit the observed distribution of signal arrival angles. The acoustic availability of whales during their dive cycle was estimated from the duration of acoustic encounters using a mark‐recapture approach. Overall, Cuvier's beaked whales were present during 0.60% of snapshots, and their estimated average density is 5.12 animals per 1,000 km2(CV= 0.27). Their estimated abundance in the study area is 5,454 individuals (95% credibility intervals: 3,151 to 8,907).
Comparative analysis of mechanical properties of orthodontic aligners produced by different contemporary 3D printers
Authors: Zinelis Spiros , Panayi Nearchos , Polychronis Georgios , Papageorgiou Spyridon N. , Eliades Theodore 
Published: September 2021

AbstractObjectiveThe aim of this study was to compare the mechanical properties of orthodontic aligners among different commercially available 3D printing devices.Materials and MethodsFive 3D printers (Ka:rv LP 550, Swinwon; “KAR”), (L120, Dazz 3D; “L12”), (MiiCraft 125, Miicraft Jena; “MIC”), (Slash 2, Uniz; “SLS”) and (Pro 95, SprintRay; “PRO”) were used to prepare orthodontic aligners with dental resin (Tera Harz TC‐85DAW, Graphy). The central incisors of each aligner were cut, prepared and evaluated in terms of Martens‐Hardness (HM), indentation‐modulus (EIT) and elastic‐index (ηIT) as per ISO14577‐1:2002. Force‐indentation curves were recorded and differences among printers were checked with generalized linear regressions (alpha=5%).ResultsStatistically significant differences were seen for all mechanical properties (P < .05), which were in descending order: HM (N/mm2) as median (Interquartile Range [IQR]): SLS 108.5 (106.0‐112.0), L12 103.0 (102.0‐107.0), KAR 101.5 (97.5‐103.0), MIC 100.0 (97.5‐101.5) and PRO 94.0 (93.0‐96.0); EIT (MPa) as mean (Standard Deviation [SD]): SLS 2696.3 (124.7), L12 2627.8 (73.5), MIC 2566.2 (125.1), KAR 2565.0 (130.2) and PRO 2491.2 (53.3); and ηIT (%) as median (IQR): SLS 32.8 (32.3‐33.1), L12 31.6 (30.8‐32.3), KAR 31.3 (30.9‐31.9), MIC 30.5 (29.9‐31.2) and PRO 29.5 (29.1‐30.0). Additionally, significant differences existed between liquid crystal display (LCD) and digital light processing (DLP) printers for HM (P < .001), EIT (P = .002) and ηIT (P < .001), with aligners from the former having higher values than aligners from the latter printer.ConclusionUnder the limitations of this study, it may be concluded that the mechanical properties of 3D‐printed orthodontic aligners are dependent on the 3D printer used, and thus, differences in their clinical efficacy are anticipated.
Phosphorylation of major Porphyromonas gingivalis virulence factors is crucial for their processing and secretion
Authors: Nowakowska Zuzanna , Madej Mariusz , Grad Sylwia , Wang Tiansong , Hackett Murray , Miller Daniel P. , Lamont Richard J. , Potempa Jan 
Published: September 2021

AbstractThe main etiological agent of periodontitis is the anaerobic bacterium Porphyromonas gingivalis. Virulence of this pathogen is controlled by various mechanisms and executed by major virulence factors including the gingipain proteases, peptidylarginine deiminase (PPAD), and RagB, an outer membrane macromolecular transport component. Although the structures and functions of these proteins are well characterized, little is known about their posttranslational maturation. Here, we determined the phosphoproteome of P. gingivalis in which phosphorylated tyrosine residues constitute over 80% of all phosphoresidues. Multiple phosphotyrosines were found in gingipains, PPAD, and RagB. Although mutation of phosphorylated residues in PPAD and RagB had no effect on secretion or activity, site‐directed mutagenesis showed that phosphorylation in hemagglutinin/adhesin domains of RgpA and Kgp, and in the catalytic domain of RgpB, had a strong influence on secretion, processing, and enzymatic activity. Moreover, preventing phosphorylation of one gingipain influenced the others, suggesting multiple phosphorylation‐dependent pathways of gingipain maturation in P. gingivalis. Various candidate kinases including Ptk1 BY kinase and ubiquitous bacterial kinase 1 (UbK1) may be involved, but their contribution to gingipain processing and activation remains to be confirmed.
Application timing of herbicides, glyphosate and atrazine, sway respective epidemics of foliar pathogens in herbicide‐tolerant rapeseed
Authors: Murtza Tamsal , You Ming Pei , Barbetti Martin J. 
Published: September 2021

AbstractRapeseed (Brassica napus) production in Australia relies heavily on triazine‐or glyphosate‐tolerant cultivars. For 14 triazine‐tolerant cultivars, disease development of Neopseudocercosporella capsellae (white leaf spot), Alternaria brassicae and A. japonica (Alternaria leaf spot), and Hyaloperonospora brassicae (downy mildew) were all dependent upon herbicide application timing (p < 0.001), with significant differences between cultivars (p < 0.001) and a significant interaction (p < 0.001) between herbicide application timing and cultivars. Atrazine applied preinfection by N. capsellae, A. brassicae, or A. japonica enhanced disease incidence, severity, and leaf collapse, while atrazine application postinfection for these same pathogens reduced all three disease parameters. However, for H. brassicae, application of atrazine after, and especially prior to, infection resulted in lower disease incidence, severity, and leaf collapse. Application of glyphosate on five glyphosate‐tolerant cultivars for N. capsellae resulted in significant differences (p < 0.05) between glyphosate application treatments, and between host cultivars in terms of incidence and consequent leaf collapse. For A. brassicae, A. japonica, and H. brassicae, glyphosate resulted in significant differences (p < 0.001) across application timings between cultivars, and a significant interaction (p < 0.001) between herbicide application timings and cultivars. Glyphosate applied on glyphosate‐resistant rapeseed after, and especially prior to, attack by H. brassicae, reduced downy mildew. These are the first studies to highlight how the timing of application of triazine or glyphosate in relation to pathogen infection is critical to the susceptibility of rapeseed to white leaf spot, Alternaria leaf spot, and downy mildew. This new understanding offers fresh possibilities for improved management of these diseases in herbicide‐tolerant rapeseed crops.
Need, effort, or integration? The development of intuitive distributive justice decisions in children, adolescents, and adults
Authors: Kienbaum Jutta , Mairhofer Sigrid 
Published: September 2021

AbstractThis study examined the criteria children, adolescents, and adults intuitively apply when they distribute a resource between two protagonists who differ systematically in need and effort. Two main questions were investigated: (a) Do the allocation criteria (equality, need, effort, integration of need and effort) differ by age? (b) Do the allocation criteria of adolescents differ in accordance with whether they attend a vocational or an academic‐track school? A total of N = 481 participants took part in two experiments. In each, they had to make 18 decisions about how to allocate a resource fairly. The experiments differed in their operationalization of need (amount of sweets in Experiment 1 vs. number of toys in Experiment 2). In Experiment 1, allocation decisions made on the basis of need information alone occurred primarily in 7‐ and 9‐year‐olds and became less frequent in 12‐ and 16‐year‐olds and adults. Allocation decisions made on the basis of effort information alone were rare in children and occurred with increasing frequency in adolescents and adults. An integration of need and effort was the most common principle chosen from ages 9 to 16, followed by an orientation toward integration or effort alone in adults. Adolescents’ allocation patterns did not vary by the type of school they attended. In Experiment 2, only adolescents and adults participated. Their results largely replicated those of Experiment 1. The discussion addresses the impact of cognitive development and socialization processes for the development of distributive justice.
The jojoba genome reveals wide divergence of the sex chromosomes in a dioecious plant
Authors: Al‐Dossary Othman , Alsubaie Bader , Kharabian‐Masouleh Ardashir , Al‐Mssallem Ibrahim , Furtado Agnelo , Henry Robert J. 
Published: September 2021

SUMMARYMost flowering plants are hermaphrodites, but around 6% of species are dioecious, having separate male and female plants. Sex chromosomes and some sex‐specific genes have been reported in plants, but the genome sequences have not been compared. We now report the genome sequence of male and female jojoba (Simmondsia chinensis) plants, revealing a very large difference in the sex chromosomes. The male genome assembly was 832 Mb and the female 822 Mb. This was explained by the large size differences in the Y chromosome (37.6 Mb) compared with the X chromosome (26.9 Mb). Relative to the X chromosome, the Y chromosome had two large insertions each of more than 5 Mb containing more than 400 genes. Many of the genes in the chromosome‐specific regions were novel. These male‐specific regions included many flowering‐related and stress response genes. Smaller insertions found only in the X chromosome totalled 877 kb. The wide divergence of the sex chromosomes suggests a long period of adaptation to diverging sex‐specific roles. Male and female plants may have evolved to accommodate factors such as differing reproductive resource allocation requirements under the stress of the desert environment in which the plants are found. The sex‐determining regions accumulate genes beneficial to each sex. This has required the evolution of many more novel sex‐specific genes than has been reported for other organisms. This suggest that dioecious plants provide a novel source of genes for manipulation of reproductive performance and environmental adaptation in crops.
Multi‐product firms, product quality heterogeneity and trade liberalisation
Authors: Yin Sisi , Gao Yunshu , Gao Bo 
Published: September 2021

ABSTRACTThis paper develops a model of multi‐product firms with endogenous quality across products within a firm. The model can reconcile the empirical fact that product quality and market size exhibit an inverted U relationship. In our model, on the one hand, a larger market has a larger scope of quality differentiation and induces firms to increase quality; on the other hand, market competition is more intense in a larger market, exerting a negative influence on quality. We show that the model without taking quality differentiation into consideration could significantly underestimate the market competition and welfare. Moreover, our numerical analysis suggests that the model without taking quality differentiation into consideration could also significantly overestimate the gains of trade liberalisation.
Post‐activation potentiation induced by concentric contractions at three speeds in humans
Authors: Zero Alexander M. , Rice Charles L. 
Published: September 2021

New Findings
What is the central question of this study?Is the degree of in human muscle affected by different shortening velocities, or contraction type?
What are the main findings and their importance?The PAP response following maximal concentric contractions was independent of velocity. Slow and moderate velocity maximal contractions produced PAP responses like those from maximal isometric contractions when matched for contraction duration. Despite contraction type differences in cross‐bridge and Ca2+ kinetics, maximal contractions, regardless of contraction modality, likely generate sufficient Ca2+ to induce maximal PAP.
AbstractPost‐activation potentiation (PAP) is the acute enhancement of contractile properties following a brief (<10 s) high‐intensity contraction. Compared with isometric contractions, little is known about the PAP response induced by concentric conditioning contractions (CCs) and the effect of velocity. In the dorsiflexors of 11 participants, twitch responses were measured following 5 s of maximal effort concentric CCs at each of 10, 20 and 50°/s. Concentric PAP responses were compared to a maximal isometric voluntary contraction (MVC) matched for contraction time. Additionally, concentric CCs were compared to isometric CCs matched for mean torque, contraction area and time. The PAP response following maximal concentric CCs was independent of velocity and there was no difference in the PAP response between concentric CCs and an isometric MVC. During maximal contractions, regardless of contraction modality, there is likely sufficient Ca2+ to induce a similar full PAP response, and thus there was no difference between speeds or contraction type. Following concentric CCs there was a significantly larger peak twitch torque than following their isometric torque matches (49–58%), and faster maximal rates of torque development at the three speeds (62–77%). However, these responses are likely related to greater EMG in concentric contractions, 125–129% of isometric maximum compared to 38–54%, and not to contraction modality per se. Thus, PAP responses following maximal concentric CCs are not affected by velocity and responses are not different from an isometric MVC. This indicates maximal CCs of 5 s produce a maximal PAP response independent of contraction type (isometric vs. concentric) or shortening velocity.
The Effect of Transformational Leadership and Well-Being on Performance of Soccer Players: An Inclusive Model
Authors: Yildirim Sinan , Koruç Ziya 
Published: September 2021

The current study focuses on the effect of transformational leadership on athletes’ performance in the mediation of psychological need satisfaction, burnout, competition anxiety, life satisfaction, and positive–negative affect. The sample consisted of 391 soccer players aged between 16 and 20 years. Six scales were used in this study: Multifactor Leadership Questionnaire, Needs Satisfaction Scale, Athlete Burnout Measure, Satisfaction with Life Scale, Positive and Negative Affect Scale, and Sport Competition Anxiety Test. The method of Vallerand was preferred to measure performance, and structural equation modeling was employed to analyze data. The model data fit was also verified. It was found that the transformational leadership behaviors of coaches signally influence athletes’ performance either directly or indirectly. From another perspective, increasing the psychological health or well-being of athletes has important effects on sport performance.
New Data about the Distribution of Three Phylogenetic Lineages of Arctic Charr Salvelinus alpinus (Salmonidae) in their Contact Zones in the North of East Siberia
Authors: Gordeeva N. V. , Alekseyev S. S. , Kirillov A. F. , Romanov V. I. , Pichugin M. Yu. 
Published: September 2021

Abstract
In order to study the distribution of phylogenetic mtDNA lineages of Arctic charr Salvelinus alpinus in their contact zones in the north of East Siberia we analyzed nucleotide sequences of mtDNA control region of charr from 10 Arctic populations in the area from the Yenisei to the Lena. At the Putorana plateau, haplotypes of Atlantic and Siberian subgroups of Eurasian group were recorded, in the Khatanga River basin, haplotypes of Atlantic subgroup, in the Lena River delta, haplotypes of Siberian subgroup and of Bering group were observed. Some Siberian haplotypes found at the Putorana and in the Lena delta, have been earlier registered in other regions of East Siberia. New findings, along with published materials allow to specify the ranges of these three phylogenetic lineages and the margins of their contact zones; they also evidence wide sympatry of Atlantic and Siberian haplotypes in Taimyr water bodies and support close relationship of charr of Siberian subgroup from all main areas of their distribution.
A Study of the Catalytic Properties of Synthetic Aluminosilicates of Different Morphologies in Cracking Reactions of the Byproducts of Isoprene Synthesis
Authors: Alikina Yu. A. , Spetsov E. A. , Ulyanova N. Yu. , Golubeva O. Yu. 
Published: September 2021

Abstract
The catalytic activity of synthetic samples of aluminosilicates of various morphologies and chemical compositions in a cascade of reactions that are byproducts (BPs) in the decomposition process of 4,4‑dimethyl-1,3-dioxane is studied. Aluminosilicates with montmorillonite structures (Na0.2Al1.8Mg0.2Si4O10(OH)2⋅nH2O, Mg3Si4O10(OH)2⋅nH2O), and kaolinite (Al2Si2O5(OH)4) with the spherical and platy morphologies of particles, as well as their porous-textural characteristics and surface properties, are studied. It is shown that the specific surface area of the studied samples, depending on the composition, varies from 11 to 470 m2/g, and the content of aluminum oxide in the samples ranged from 0 to 24 wt %. It is found that layered silicates with a montmorillonite structure contribute to reducing the gasification of organic raw materials and increasing the yield of isoprene. Kaolinite with a spherical morphology of particles increases the yield of formaldehyde, and with a platy morphology of particles, it increases the degree of decomposition of heteroatomic and cyclic compounds.
Therapeutic effect of modified double-dose photodynamic therapy in circumscribed choroidal haemangioma
Authors: Byeon Hyeong Ju , Lee Ji Hwan , Lee Junwon , Choi Eun Young , Kim Yong Joon , Lee Sung Chul , Lee Christopher Seungkyu 
Published: September 2021

AimsTo retrospectively compare the therapeutic effect of modified double-dose photodynamic therapy (PDT) with standard-dose PDT in patients with circumscribed choroidal haemangioma (CCH).MethodsThirty-nine patients with CCH were categorised in two groups by PDT type. The standard-dose group (n=12) was treated with 6 mg/m2verteporfin and a 689 nm laser for 83 s. The modified double-dose group (n=27) received one vial of verteporfin (15 mg), and the dose was calculated for each patient based on body surface area, then irradiance time was adjusted according to calculated verteporfin dose to achieve a ‘double’-dose effect. Treatment outcomes (foveal centre thickness, subretinal fluid, tumour thickness and diameter) were measured at baseline and 1 year post-treatment; subretinal fluid levels were also measured at 1, 3 and 6 months post-treatment.ResultsNo differences in baseline characteristics were found between the two groups. The modified double-dose group showed a greater reduction in tumour thickness (45.3% vs 20.6%, p=0.013) and tumour volume (60.0% vs 30.0%, p=0.006) at 1 year post-treatment. Recurred or non-complete resolution patients in the standard-dose group tended to show much increased subretinal fluid than those in the modified double-dose group at 1-year post-treatment.ConclusionModified double-dose PDT is an effective and safe protocol for symptomatic CCH management, greater tumour regression and potentially better resolution of subretinal fluid compared with standard PDT.
Venous Capacitance and Venous Return in Young Adults with Typical Vasovagal Syncope: A Cross-Sectional Study
Authors: Fish Ely , Barak Lanciano Sapir , Shavit Itay , Palacci Hagar , Chaiat Chen , Avivi Ishay , Haber Kaptsenel Ella , Nussinovitch Udi 
Published: September 2021

Vasovagal syncope (VVS) has a high prevalence in the general population and is associated with potential complications. There is limited information on the possible association between venous capacitance (VC) and venous return (VR), important determinants of preload and VVS. Since the tilt test was reported to yield a high rate of false positive results, the aim of this study was to evaluate whether abnormal VC and VR at baseline could predispose individuals to VVS. To this end, 88 young, healthy volunteers were recruited and classified to 26 (29.5%) who experienced typical VVS and 62 (70.5%) who did not. VC and VR were evaluated with a commercial device and plethysmography applied to the elevated legs. Maximum venous outflow (MVO), segmental venous capacitance (SVC) and MVO/SVC ratio were calculated and averaged. No significant differences between MVO (5.0±0.5 vs 5.6±0.8, p>0.05), SVC (6.0±0.5 vs 6.3±0.8, p>0.05) or MVO/SVC ratio (0.83±0.02 vs 0.86±0.03, p>0.05) were observed for the non-VVS and VVS volunteers, respectively. There was a significant association between a higher MVO and SVC values and a larger decrease in diastolic blood pressure with standing, although correlations were weak (R2=0.0582 and 0.0681, respectively). In conclusion, at baseline, VC and VR are not impaired in healthy volunteers with a history of VVS. It remains unknown if similar results would be found in patients with cardiovascular comorbidities. Also, the sensitivity of VC and VR evaluations to identify a predisposition for VVS following physiological provocations merits further study.