bluuebunny/crossref_metadata_2025_split huggingface dataset:
Response of pale swallowwort (Vincetoxicum rossicum) to multiple years of mowing
Authors: Biazzo Jeromy , Milbrath Lindsey R. 
Published: August 2019

AbstractPale swallowwort (Vincetoxicum rossicum), as well as its congener, black swallowwort (Vincetoxicum nigrum), is a European viny milkweed that has become invasive in natural areas and perennial cropping systems in the northeastern and midwestern United States and southeastern Canada. Mechanical control over 1 to 2 yr has not been effective, but studies of a longer duration are needed. We measured effects of mowing (no mowing or three or six times per growing season) on stem and root crown densities, percent cover, and follicle (seed pod) production of V. rossicum and percent cover of other vegetation over a 7-yr period. Stem density, root crown density, and percent cover of V. rossicum were reduced after 3 to 5 yr of mowing regardless of mowing frequency. Cover of other, mostly nonnative, broadleaf species increased. Follicle production was eliminated in all years of the study. In our environment, mowing three times at monthly intervals during the growing season can prevent seed production. However, mowing must occur for at least 3 yr to reduce, but not eliminate, stands of V. rossicum.
Mavericks versus Party Insiders: A Survey Experiment on Candidate- and Partycentric Attitudes of Voters
Authors: Alcañiz Isabella , Calvo Ernesto , Escolar Marcelo 
Published: August 2019

ABSTRACTThis study examines the extent to which priming voters on the trustworthiness of candidates or that of their parties elicits candidatecentric or partycentric attitudes. The analysis provides evidence of the trade-off for voters between mavericks and party insiders in presidential elections. It shows that voters are sensitized to the risks of electing a candidate with no party support, but in the particular case of Argentina, they still consider the candidates’ qualities to be more important than those of their parties. The results show that priming on the trustworthiness of candidates elicits stronger responses from low-income voters, who already have prior candidatecentric inclinations. The findings also reveal statistical differences in vote choice when respondents are primed with party- or candidatecentric frames.
Partisan Learning or Racial Learning: Opinion Change on Sanctuary City Policy Preferences in CA and TX
Authors: Collingwood Loren , Gonzalez O'Brien Benjamin , Tafoya Joe R. 
Published: August 2019

AbstractSignificant research indicates that attitude change is often a product of partisan learning. However, as the party system continues to rearrange around issues of race and immigration, and as new racial policy issues thrust onto the agenda, it is unclear whether voters learn to adopt racial policy attitudes more based on race/ethnicity or on party identification. We evaluate the partisan-learning model versus a racial-learning model with regards to public opinion on sanctuary cities/policies among survey respondents in CA and TX. Given President Trump's public antipathy toward sanctuary cities, we argue and show that negative partisanship is the most plausible vehicle for sanctuary city attitude change between 2015 and 2017. In this particular case, we find no support for a racial/ethnic-learning model.
Effect of long-term nutrient management practices on soil micronutrient concentrations and uptake under a rice–wheat cropping system
Authors: Puniya Ramphool , Pandey P. C. , Bisht P. S. , Singh D. K. , Singh A. P. 
Published: August 2019

AbstractA field experiment was conducted to study the long-term effects of nutrient management practices on micronutrient concentrations in soil and their uptake by crops under a long-term rice–wheat cropping system. The treatments comprised different combinations of N, P, K, Zn and farm yard manure (FYM), used as nutrient management practices. After 25 years of continuous cropping, the higher grain yields and uptake of iron (Fe), manganese (Mn), copper (Cu) and zinc (Zn) were obtained when FYM was applied along with mineral sources of nitrogen, phosphorus and potassium (NPK) when compared to mineral sources of NPK alone. The residual effect of FYM, applied to rice, on the yield of subsequent wheat was significant. The application of mineral NPK with FYM recorded higher diethylene triamine penta acetic acid extracted (DTPA)-Fe, Mn and Cu concentrations in the soil compared to any other treatment. The plots with Zn application showed higher DTPA-Zn concentration in the soil compared to any other treatments. The available Fe, Mn and Cu in the soil were higher than their critical limits and the soil was low in Zn where inorganic fertilizers were applied alone (without Zn). Integrated application of mineral NPK and FYM to the rice crop and mineral NPK to wheat was found to be the best nutrient management practice in producing higher yields of rice and wheat and improve long-term soil micronutrient concentrations.
Pine chemical volatiles promote dauer recovery of a pine parasitic nematode, Bursaphelenchus xylophilus
Authors: Zhang Wei , Li Yongxia , Pan Long , Wang Xuan , Feng Yuqian , Zhang Xingyao 
Published: August 2019

AbstractPinewood nematode, Bursaphelenchus xylophilus, a pine parasitic nematode, poses a serious threat to its host pine forests globally. When dispersal-stage larvae 4 (dauer, DL4) of B. xylophilus enters the new pine, it moults into propagative adult (dauer recovery) and reproduces quickly to kill the host pine. Here, we found pine chemical volatiles, rather than the common dauer recovery factors of nematodes (e.g. suitable temperatures, nutrient availability or density), promote B. xylophilus dauer recovery. The results showed that volatilization of chemicals in host pines could attract DL4 and promote DL4 recovery. To identify which chemicals promote this process, we determined the stimulated activity of the main volatiles of pines including six monoterpenes and two sesquiterpenes. Results showed that all the six monoterpenes promoted dauer recovery, especially β-pinene and β-myrcene, but the two sesquiterpenes have no effect on the transformation. Furthermore, β-pinene performed gradient effects on dauer recovery. We hypothesized that when DL4 infect pine trees, the pine volatiles released from the feeding wounds are used as chemical signals for DL4 transformation to adult to reproduce and rapidly kill the pines. Our study identified the B. xylophilus dauer recovery chemical signal and may contribute to preventing pine wilt disease.
Intersection of verbal memory and expressivity on cortical contrast and thickness in first episode psychosis
Authors: Makowski Carolina , Lewis John D. , Lepage Claude , Malla Ashok K. , Joober Ridha , Evans Alan C. , Lepage Martin 
Published: August 2019

AbstractBackgroundLongitudinal studies of first episode of psychosis (FEP) patients are critical to understanding the dynamic clinical factors influencing functional outcomes; negative symptoms and verbal memory (VM) deficits are two such factors that remain a therapeutic challenge. This study uses white-gray matter contrast at the inner edge of the cortex, in addition to cortical thickness, to probe changes in microstructure and their relation with negative symptoms and possible intersections with verbal memory.MethodsT1-weighted images and clinical data were collected longitudinally for patients (N= 88) over a two-year period. Cognitive data were also collected at baseline. Relationships between baseline VM (immediate/delayed recall) and rate of change in two negative symptom dimensions, amotivation and expressivity, were assessed at the behavioral level, as well as at the level of brain structure.ResultsVM, particularly immediate recall, was significantly and positively associated with a steeper rate of expressivity symptom decline (r= 0.32,q= 0.012). Significant interaction effects between baseline delayed recall and change in expressivity were uncovered in somatomotor regions bilaterally for both white-gray matter contrast and cortical thickness. Furthermore, interaction effects between immediate recall and change in expressivity on cortical thickness rates were uncovered across higher-order regions of the language processing network.ConclusionsThis study shows common neural correlates of language-related brain areas underlying expressivity and VM in FEP, suggesting deficits in these domains may be more linked to speech production rather than general cognitive capacity. Together, white-gray matter contrast and cortical thickness may optimally inform clinical investigations aiming to capture peri-cortical microstructural changes.
Timing of menarche and self-harm in adolescence and adulthood: a population-based cohort study
Authors: Roberts Elystan , Fraser Abigail , Gunnell David , Joinson Carol , Mars Becky 
Published: August 2019

AbstractBackgroundPrevious studies of pubertal timing and self-harm are limited by subjective measures of pubertal timing or by the conflation of self-harm with suicide attempts and ideation. The current study investigates the association between an objective measure of pubertal timing – age at menarche – and self-harm with and without suicidal intent in adolescence and adulthood in females.MethodBirth cohort study based on 4042 females from the Avon Longitudinal Study of Parents and Children (ALSPAC). Age at menarche was assessed prospectively between ages 8 and 17 years. Lifetime history of self-harm was self-reported at ages 16 and 21 years. Associations between age at menarche and self-harm, both with and without suicidal intent, were examined using multivariable logistic regression.ResultsLater age at menarche was associated with a lower risk of lifetime self-harm at age 16 years (OR per-year increase in age at menarche 0.87; 95% CI 0.80–0.95). Compared with normative timing, early menarche (<11.5 years) was associated with an increased risk of self-harm (OR 1.31, 95% CI 1.04–1.64) and later menarche (>13.8 years) with a reduced risk (OR 0.74, 95% CI 0.58–0.93). The pattern of association was similar at age 21 years (OR per-year increase in age at menarche 0.92, 95% CI 0.85–1.00). There was no strong evidence for a difference in associations with suicidal v. non-suicidal self-harm.ConclusionsRisk of self-harm is higher in females with early menarche onset. Future research is needed to establish whether this association is causal and to identify potential mechanisms.
Can Transitional Justice Improve the Quality of Representation in New Democracies?
Authors: Ang Milena , Nalepa Monika 
Published: August 2019

AbstractCan transitional justice enhance democratic representation in countries recovering from authoritarian rule? The authors argue that lustration, a policy that reveals secret collaboration with the authoritarian regime, can prevent former authoritarian elites from extorting policy concessions from past collaborators who have been elected as politicians in the new regime. Absent lustration, former elites can threaten to reveal information about past collaboration unless the politicians implement policies these elites desire. In this way, lustration policies enable politicians to avoid blackmail and to be responsive to their constituents, improving the quality of representation. The authors show that whether lustration enhances representation depends on its severity and the extent to which dissidents-turned-politicians would suffer if the skeletons in their closets were revealed. The authors also find that the potential to blackmail politicians increases as the ideological distance between authoritarian elites and politicians decreases. They test this theory with original data from the Global Transitional Justice Dataset, which spans eighty-four countries that transitioned to democracy since 1946.
Elaborating on premature adolescent autonomy: Linking variation in daily family processes to developmental risk
Authors: Fosco Gregory M. , LoBraico Emily J. 
Published: August 2019

AbstractThis study revisits the premature autonomy model by examining parents’ use of positive behavior support (PBS) practices on a daily timescale to better understand underlying processes in developmental changes in family disengagement and the implications for adolescent problem behavior and substance use. This study included 151 9th and 10th grade adolescents (61.5% female) and their caregivers, who participated in a baseline assessment, a 21-day daily diary burst, and a 1-year follow-up assessment. Four key findings emerged: (a) on days when parents used more PBS, adolescents felt more close and connected to their caregivers; (b) adolescents who exhibited a larger-magnitude of change in connectedness with caregivers in relation to variation in positive parenting (termedfragile connectedness) were at higher risk for antisocial behavior, deviant peer involvement, and substance use one year later; (c) individual differences in initial levels of antisocial behavior and effortful control accounted for between-person variation in fragile connectedness; and (d) day-level adolescent anger and parent–adolescent conflict predicted within-family variation in parents’ use of PBS. Implications for the premature autonomy model and intervention science are discussed.
Sugar-sweetened beverage consumption among Indigenous Australian children aged 0–3 years and association with sociodemographic, life circumstances and health factors
Authors: Thurber Katherine A , Long Johanna , Salmon Minette , Cuevas Adolfo G , Lovett Raymond 
Published: August 2019

AbstractObjective:To explore beverage intake and associations between sugar-sweetened beverage (SSB) intake and sociodemographic, life circumstances, health and well-being factors in a national cohort of Indigenous children.Design:We calculated prevalence ratios for any SSB consumption across exposures, using multilevel Poisson regression (robust variance), adjusted for age group and remoteness. A key informant focus group contextualised these exploratory findings.Setting:Diverse settings across Australia.Participants:Families of Indigenous children aged 0–3 years, in the Longitudinal Study of Indigenous Children.Results:Half (50·7 %, n 473/933) of children had ever consumed SSB at survey, increasing from 29·3 % of 0–12-month-olds to 65·7 % of 18–36-month-olds. SSB consumption prevalence was significantly lower in urban and regional v. remote areas, and in families experiencing socio-economic advantage (area-level advantage, caregiver employed, financial security), better life circumstances (caregiver social support, limited exposure to stressors) and caregiver well-being (non-smoking, social and emotional well-being, physical health). SSB consumption prevalence was significantly lower among those engaged with health services (adequate health-service access, regular prenatal check-ups), except SSB consumption prevalence was higher among those who received home visits from an Aboriginal Health Worker compared with no home visits. Key informants highlighted the role of water quality/safety on SSB consumption.Conclusions:A substantial proportion of Indigenous children in this sample consumed SSB from an early age. Health provider information needs to be relevant to the context of families’ lives. Health system strategies must be paired with upstream strategies, such as holistic support programmes for families, reducing racism and improving water quality.
Analysis of dietary patterns and cross-sectional and longitudinal associations with hypertension, high BMI and type 2 diabetes in Peru
Authors: Alae-Carew Carmelia , Scheelbeek Pauline , Carrillo-Larco Rodrigo M , Bernabé-Ortiz Antonio , Checkley William , Miranda J Jaime 
Published: August 2019

AbstractObjective:To determine if specific dietary patterns are associated with risk of hypertension, type 2 diabetes mellitus (T2DM) and high BMI in four sites in Peru.Design:We analysed dietary patterns from a cohort of Peruvian adults in four geographical settings using latent class analysis. Associations with prevalence and incidence of hypertension, T2DM and high BMI were assessed using Poisson regression and generalised linear models, adjusted for potential confounders.Setting:Four sites in Peru varying in degree of urbanisation.Participants:Adults aged ≥35 years (n3280).Results:We identified four distinct dietary patterns corresponding to different stages of the Peruvian nutrition transition, reflected by the foods frequently consumed in each pattern. Participants consuming the ‘stage 3’ diet, characterised by high proportional consumption of processed foods, animal products and low consumption of vegetables, mostly consumed in the semi-urban setting, showed the highest prevalence of all health outcomes (hypertension 32·1 %; T2DM 10·7 %; high BMI 75·1 %). Those with a more traditional ‘stage 1’ diet characterised by potato and vegetables, mostly consumed in the rural setting, had lower prevalence of hypertension (prevalence ratio; 95 CI: 0·57; 0·43, 0·75), T2DM (0·36; 0·16, 0·86) and high BMI (0·55; 0·48, 0·63) compared with the ‘stage 3’ diet. Incidence of hypertension was highest among individuals consuming the ‘stage 3’ diet (63·75 per 1000 person-years; 95 % CI 52·40, 77·55).Conclusions:The study found more traditional diets were associated with a lower prevalence of three common chronic diseases, while prevalence of these diseases was higher with a diet high in processed foods and low in vegetables.
Intellectual Property from a Global Environmental Law Perspective: Lessons from Patent Disclosure Requirements for Genetic Resources and Traditional Knowledge
Authors: Chiarolla Claudio 
Published: August 2019

AbstractThis commentary considers the intellectual property (IP) system from a global environmental law perspective by exploring the extent to which patent-related treaties, such as the World Trade Organization Agreement on Trade-Related Aspects of Intellectual Property Rights and the World Intellectual Property Organization Patent Cooperation Treaty, can facilitate implementation of global environmental standards in the field of biodiversity law. It provides practical guidance to countries that wish to introduce patent disclosure-related mechanisms into their legal systems with a view to mainstreaming instances of global justice, fairness and equity, and raises awareness of the limitations arising from their extant IP obligations. Global environmental law standards have exercised an undeniable influence on the political discourse in international IP policy making in the field of patent disclosure. Still, many patent disclosure requirements that pre-date the Nagoya Protocol apply only to genetic resources the provenance of which is the same country that established the requirement. However, if a country designates its patent or IP office as a compliance checkpoint under the Nagoya Protocol, then the disclosure requirement should encompass at least the genetic resources originating from all countries that are contracting parties to this instrument. This could allow the fulfilment of a core monitoring obligation of the latter, while enabling wider synergies and transparency within the IP system.
Large crabgrass (Digitaria sanguinalis) and Palmer amaranth (Amaranthus palmeri) intraspecific and interspecific interference in soybean
Authors: Basinger Nicholas T. , Jennings Katherine M. , Monks David W. , Jordan David L. , Everman Wesley J. , Hestir Erin L. , Bertucci Matthew B. , Brownie Cavell 
Published: August 2019

AbstractField studies were conducted in 2016 and 2017 at Clinton, NC, to quantify the effects of season-long interference of large crabgrass [Digitaria sanguinalis (L.) Scop.] and Palmer amaranth (Amaranthus palmeri S. Watson) on ‘AG6536’ soybean [Glycine max (L.) Merr.]. Weed density treatments consisted of 0, 1, 2, 4, and 8 plants m−2 for A. palmeri and 0, 1, 2, 4, and 16 plants m−2 for D. sanguinalis with (interspecific interference) and without (intraspecific interference) soybean to determine the impacts on weed biomass, soybean biomass, and seed yield. Biomass per square meter increased with increasing weed density for both weed species with and without soybean present. Biomass per square meter of D. sanguinalis was 617% and 37% greater when grown without soybean than with soybean, for 1 and 16 plants m−2 respectively. Biomass per square meter of A. palmeri was 272% and 115% greater when grown without soybean than with soybean for 1 and 8 plants m−2, respectively. Biomass per plant for D. sanguinalis and A. palmeri grown without soybean was greatest at the 1 plant m−2 density. Biomass per plant of D. sanguinalis plants across measured densities was 33% to 83% greater when grown without soybean compared with biomass per plant when soybean was present for 1 and 16 plants m−2, respectively. Similarly, biomass per plant for A. palmeri was 56% to 74% greater when grown without soybean for 1 and 8 plants m−2, respectively. Biomass per plant of either weed species was not affected by weed density when grown with soybean due to interspecific competition with soybean. Yield loss for soybean grown with A. palmeri ranged from 14% to 37% for densities of 1 to 8 plants m−2, respectively, with a maximum yield loss estimate of 49%. Similarly, predicted loss for soybean grown with D. sanguinalis was 0 % to 37% for densities of 1 to 16 m−2 with a maximum yield loss estimate of 50%. Soybean biomass was not affected by weed species or density. Results from these studies indicate that A. palmeri is more competitive than D. sanguinalis at lower densities, but that similar yield loss can occur when densities greater than 4 plants m−2 of either weed are present.
Dissolved Iron Supply from Asian Glaciers: Local Controls and a Regional Perspective
Authors: Li Xiangying , Ding Yongjian , Hood Eran , Raiswell Robert , Han Tianding , He Xiaobo , Kang Shichang , Wu Qingbai , Yu Zhongbo , Mika Sillanpää , Liu Sha , Li Qijiang 
Published: August 2019

AbstractIce sheets have been shown to deliver large amounts of labile iron (Fe) to aquatic ecosystems; however, the role of glaciers distinct from ice sheets in supplying labile Fe to downstream ecosystems is less well understood despite their rapid volume loss globally. Direct and continuous measurements of Fe from glaciers throughout an entire melt season are very limited to date. Here we present extensive seasonal data on 0.45‐μm‐filtered Fe (dFe) from three glaciers in Asia. Concentrations of dFe are negatively correlated with glacier discharge, and dFe yields are closely related to specific discharge. Based on our study and previously published dFe data, we estimate the release of dFe from Asian glaciers to be 23.8±14.1 Gg/a. We further compile a global data set of dFe from more than 12 glaciers, which, when combined with data on glacier discharge, suggest that the release of dFe from glaciers globally is on the order of 185±172 Gg/a. This finding suggests that glaciers may provide a substantial, but largely unrecognized source of potentially labile Fe, and may become increasingly important for the Fe biogeochemical cycle in a warming climate.
In Situ Electron Density From Active Sounding: The Influence of the Spacecraft Wake
Authors: Akbari H. , Andersson L. , Andrews D. J. , Malaspina D. , Benna M. , Ergun R. 
Published: August 2019

AbstractResults obtained in the Martian ionosphere by the Langmuir Probe and Waves instrument aboard the Mars Atmosphere and Volatile EvolutioN Mission spacecraft are presented. The results include ionospheric electron densities determined from the frequency of Langmuir waves. Since the amplitude of thermal Langmuir waves is often below the instrument's detection level, Langmuir Probe and Waves excites these waves by injecting into the plasma a 3.3‐V white noise signal. Electric field spectral measurements obtained shortly after the excitation show a resonance line at frequencies slightly below the local plasma frequency. The observed resonance line is interpreted to originate from plasma waves excited in the wake behind the spacecraft. These results reveal an important phenomenon in electron density estimation from stimulated Langmuir waves. The observed phenomenon, not previously reported by earlier missions, may be a common process in active sounding that can affect in situ electron density measurements.