bluuebunny/crossref_metadata_2025_split huggingface dataset:
Excising stem samples underwater at native tension does not induce xylem cavitation
Authors: VENTURAS MARTIN D. , MACKINNON EVAN D. , JACOBSEN ANNA L. , PRATT R. BRANDON 
Published: October 2014

AbstractXylem resistance to water stress‐induced cavitation is an important trait that is associated with drought tolerance of plants. The level of xylem cavitation experienced by a plant is often assessed as the percentage loss in conductivity (PLC) at different water potentials. Such measurements are constructed with samples that are excised underwater at native tensions. However, a recent study concluded that cutting conduits under significant tension induced cavitation, even when samples were held underwater during cutting. This resulted in artificially increased PLC because of what we have termed a ‘tension‐cutting artefact’. We tested the hypothesized tension‐cutting artefact on five species by measuring PLC at native tension compared with after xylem tensions had been relaxed. Our results did not support the tension‐cutting artefact hypothesis, as no differences were observed between native and relaxed samples in four of five species. In a fifth species (Laurus nobilis), differences between native and relaxed samples appear to be due to vessel refilling rather than a tension‐cutting effect. We avoided the tension‐cutting artefact by cutting samples to slightly longer than their measurement length and subsequent trimming of at least 0.5 cm of sample ends prior to measurement.
Stem CO2 efflux in six co‐occurring tree species: underlying factors and ecological implications
Authors: RODRÍGUEZ‐CALCERRADA JESÚS , LÓPEZ ROSANA , SALOMÓN ROBERTO , GORDALIZA GUILLERMO G. , VALBUENA‐CARABAÑA MARÍA , OLEKSYN JACEK , GIL LUIS 
Published: October 2014

AbstractStem respiration plays a role in species coexistence and forest dynamics. Here we examined the intra‐ and inter‐specific variability of stem CO2 efflux (E) in dominant and suppressed trees of six deciduous species in a mixed forest stand: Fagus sylvatica L., Quercus petraea [Matt.] Liebl, Quercus pyrenaica Willd., Prunus avium L., Sorbus aucuparia L. and Crataegus monogyna Jacq. We conducted measurements in late autumn. Within species, dominants had higher E per unit stem surface area (Es) mainly because sapwood depth was higher than in suppressed trees. Across species, however, differences in Es corresponded with differences in the proportion of living parenchyma in sapwood and concentration of non‐structural carbohydrates (NSC). Across species, Es was strongly and NSC marginally positively related with an index of drought tolerance, suggesting that slow growth of drought‐tolerant trees is related to higher NSC concentration and Es. We conclude that, during the leafless period, E is indicative of maintenance respiration and is related with some ecological characteristics of the species, such as drought resistance; that sapwood depth is the main factor explaining variability in Es within species; and that the proportion of NSC in the sapwood is the main factor behind variability in Es among species.
Cytochrome P450 oxidoreductase deficiency: Rare congenital disorder leading to skeletal malformations and steroidogenic defects
Authors: Fukami Maki , Ogata Tsutomu 
Published: October 2014

AbstractCytochrome P450 oxidoreductase (POR) deficiency (PORD) is a newly characterized disorder. PORD is caused by homozygous or compound heterozygous mutations in POR encoding an electron donor for several microsomal enzymes such as CYP21A2, CYP17A1, CYP19A1, CYP51A1, and CYP26A1‐C1. Molecular defects of PORD include a Japanese founder mutation p.R457H, as well as various missense, nonsense, frameshift, and splice‐site mutations and exonic deletions. PORD leads to unique skeletal malformations referred to as Antley–Bixler syndrome, in addition to 46,XX and 46,XY disorders of sex development, pubertal failure, adrenal dysfunction, and maternal virilization during pregnancy. Such clinical features are ascribable to impaired activities of the POR‐dependent microsomal enzymes. PORD represents one form of congenital adrenal hyperplasia, although it can occur as a congenital malformation syndrome and a disorder of sex development. Phenotypic severity of PORD is highly variable and only partly depends on the residual activity of the mutant proteins. It is possible that PORD remains undiagnosed in several patients. Detailed hormonal assessment and molecular analysis are useful for diagnosis of PORD.
The length of discontinuous gas exchange cycles in lepidopteran pupae may serve as a mechanism for natural selection
Authors: Jõgar Katrin , Kuusik Aare , Metspalu Luule , Williams Ingrid H. , Ploomi Angela , Hiiesaar Külli , Luik Anne , Kivimägi Irja , Mänd Marika 
Published: October 2014

AbstractGas exchange is studied in diapausing pupae of Mamestra brassicae L., whose larvae are reared under identical conditions. The release of CO2 gas is recorded with infrared gaseous analyzers. Oxygen convective uptake into the tracheae and oxygen consumption rates are recorded by means of a constant‐volume coulometric respirometer. Outputs from both of these respirometry systems are combined with infrared actographs. All 3‐month‐old pupae of M. brassicae display a pattern of discontinuous gas exchange (DGE) cycles of CO2 gas release by bursts, although the lengths of these cycles varies between individuals. Some pupae exhibit long DGE cycles of at least 20 h in duration, with negligible CO2 gas release during interburst periods, and there is presumed to be a convective gas exchange at this time. As a result of a partial vacuum inside the tracheae, a large oxygen convective uptake always occurs at the start of the spiracular opening phase. Other pupae have short DGE cycles of less than 3 h in duration, with elevated CO2 gas release during the interburst period, when gas exchange is predominantly diffusive. The spiracular open phase in these pupae consists of frequent separate convective bursts of CO2 gas release, with the opening–closing rhythms of the spiracles, which are considered as O phase fluttering. The pupae with long DGE cycles exhibit extremely low metabolic rates and very low total water loss rates, whereas those with short DGE cycles have higher metabolic and total water loss rates. The pupae with long DGE cycles live approximately twice as long as those with short cycles; thus, the present study demonstrates that long DGE cycles confer a fitness benefit on pupae as a result of a lower metabolic rate associated with water economy, conferring on them a longer life.
Intraspecific acoustic communication and mechanical sensitivity of the tympanal ear of the gypsy moth Lymantria dispar
Authors: Rowland Eloise , Belton Peter , Schaefer Paul W. , Gries Gerhard 
Published: October 2014

AbstractTympanal ears of female gypsy moths Lymantria dispar dispar (L.) (Lepidoptera: Erebidae: Lymantriinae) are reportedly more sensitive than ears of conspecific males to sounds below 20 kHz. The hypothesis is tested that this differential sensitivity is a result of sex‐specific functional roles of sound during sexual communication, with males sending and females receiving acoustic signals. Analyses of sounds produced by flying males reveal a 33‐Hz wing beat frequency and 14‐kHz associated clicks, which remain unchanged in the presence of female sex pheromone. Females exposed to playback sounds of flying conspecific males respond with wing raising, fluttering and walking, generating distinctive visual signals that may be utilized by mate‐seeking males at close range. By contrast, females exposed to playback sounds of flying heterospecific males (Lymantria fumida Butler) do not exhibit the above behavioural responses. Laser Doppler vibrometry reveals that female tympana are particularly sensitive to frequencies in the range produced by flying conspecific males, including the 33‐Hz wing beat frequency, as well as the 7‐kHz fundamental frequency and 14‐kHz dominant frequency of associated clicks. These results support the hypothesis that the female L. dispar ear is tuned to sounds of flying conspecific males. Based on previous findings and the data of the present study, sexual communication in L. dispar appears to proceed as: (i) females emitting sex pheromone that attracts males; (ii) males flying toward calling females; and (iii) sound signals from flying males at close range inducing movement in females, which, in turn, provides visual signals that could orient males toward females.
Oculocutaneous Albinism in Sub‐Saharan Africa: Adverse Sun‐Associated Health Effects and Photoprotection
Authors: Wright Caradee Y. , Norval Mary , Hertle Richard W. 
Published: October 2014

AbstractOculocutaneous albinism (OCA) is a genetically inherited autosomal recessive condition. Individuals with OCA lack melanin and therefore are susceptible to the harmful effects of solar ultraviolet radiation, including extreme sun sensitivity, photophobia and skin cancer. OCA is a grave public health issue in sub‐Saharan Africa with a prevalence as high as 1 in 1000 in some tribes. This article considers the characteristics and prevalence of OCA in sub‐Saharan African countries. Sun‐induced adverse health effects in the skin and eyes of OCA individuals are reviewed. Sun exposure behavior and the use of photoprotection for the skin and eyes are discussed to highlight the major challenges experienced by these at‐risk individuals and how these might be best resolved.
Plasmodesmata‐located protein overexpression negatively impacts the manifestation of systemic acquired resistance and the long‐distance movement of Defective in Induced Resistance1 in Arabidopsis
Authors: Carella P. , Isaacs M. , Cameron R. K. 
Published: October 2014

AbstractSystemic acquired resistance (SAR) is a plant defence response that provides immunity to distant uninfected leaves after an initial localised infection. The lipid transfer protein (LTP) Defective in Induced Resistance1 (DIR1) is an essential component of SAR that moves from induced to distant leaves following a SAR‐inducing local infection. To understand how DIR1 is transported to distant leaves during SAR, we analysed DIR1 movement in transgenic Arabidopsis lines with reduced cell‐to‐cell movement caused by the overexpression of Plasmodesmata‐Located Proteins PDLP1 and PDLP5. These PDLP‐overexpressing lines were defective for SAR, and DIR1 antibody signals were not observed in phloem sap‐enriched petiole exudates collected from distant leaves. Our data support the idea that cell‐to‐cell movement of DIR1 through plasmodesmata is important during long‐distance SAR signalling in Arabidopsis.
Foreign Capital, Spillovers and Export Performance in Emerging Economies: Evidence fromIndianITFirms
Authors: Kemme David M. , Nikolsko‐Rzhevskyy Alex , Mukherjee Deepraj 
Published: October 2014

AbstractThe role of foreign capital inflow, foreign direct investment (FDI) and foreign portfolio investment (FPI), on export behavior of both recipients and non‐recipient competing firms in the same sector often guides economic development policy. By using panel data ofIndianITfirms over 2000–2006, we show thatFDIreduces the sunk costs of entering foreign markets and therefore positively effects both the decision to export and the export propensity of recipient firms. Foreign portfolio investment has no effect on the decision to export, but it does marginally increase the volume of exports. Further, these positiveFDIandFPIrecipient effects do not spill‐over to non‐recipients.
When Carry Trades in Currency Markets are not Profitable
Authors: Baillie Richard T. , Cho Dooyeon 
Published: October 2014

AbstractThe success of the carry trade in international currency and money markets is related to the extent of the forward premium anomaly. We present evidence that the anomaly is a very time dependent phenomenon. We also formulate a model where theex postreturns from the carry trade are functionally related to the relative difference between the interest rate on the funding currency and the interest rate associated with the target currency; i.e. the relative interest rate opportunity (RIRO). We estimate a nonlinear smooth transition regime model that relates theRIROto the returns on the carry trade, and the estimated transition function then represents the time periods when the carry trade was profitable and when it was not. The analysis indicates that the desirability of carry trading has declined and for many currencies has actually become unprofitable since the financial crisis of 2008.
Toward a Minority Culture of Mobility: Immigrant Integration into the African‐American Middle Class
Authors: Clerge Orly 
Published: October 2014

AbstractTwo important social transformations have occurred since the 1960s: the rise of the Black middle class and the influx of immigrants from Latin, America, Asia and Africa. The cultural and economic outcomes for first‐ and second‐generation Black immigrants are often linked to the Black poor/underclass. However, we understand little about the ways in which the Black middle class is a potential pathway of integration for immigrants. This paper reviews the sociological debates on the socioeconomic incorporation of immigrants and the racial and ethnic relations of new and old African‐Americans. It discusses the important contributions of minority culture of mobility hypothesis for class‐based theories of immigrant integration. We draw from the literature on social stratification, race relations and immigrant incorporation in order to chime in on the conversation about how becoming socially mobile in America may mean having similar social experience as the African‐American or minority middle class. The paper also suggests ways to better analyze the relationship between identity, integration, space and generation in minority incorporation.
The Class Politics of Alternative Food: Informing Public Health Policy and Remedying Health Inequality
Authors: Lyson Mercedes C. 
Published: October 2014

AbstractThe past decade has witnessed an interesting coupling between alternative ways to produce and consume food (farmers' markets, Consumer Supported Agriculture (CSA) shares, and urban gardens to name a few) and individual health‐seeking. While much of this activity rests on an ideological rhetoric of individual choice and “lifestyleism” strongly correlated with social class, there have also been a host of very different government and policy efforts aimed at improving poor food environments and the vulnerable populations that inhabit them in the name of public health. Efforts such as zoning against fast food franchises, placing stipulations on what benefit programs like Supplemental Nutrition Assistance Program (SNAP) can be used for, and taxing foods deemed unhealthy are sparking public debate because they cut to the heart of many American socio‐political debates: the tension between individual liberties and government intervention. Based on existing scholarship of alternative food, health, and bodies, and the author's insights gleaned from ethnographic research, this article sheds light on the potential ineffectiveness of such public health efforts despite positive – and often times class‐conscious – intentions. Such an acknowledgement raises critical questions about who benefits and who misses out in alternative food projects. While this article situates these questions squarely in the American context, it also highlights the need for other situated studies that emphasize other countries' particular political, cultural, and economic contexts that shape contemporary food systems, and their accompanying moral politics.
Conceptual Remixing in Criminology: Tracing Durkheim and Marx's Influence on Etiological Theories of Crime
Authors: Dollar Cindy Brooks 
Published: October 2014

AbstractSociologists have previously argued that our current knowledge and inquiries stem from our standing on the shoulders of giants. Exactly how this occurs, however, may be less clear. This paper identifies how the works of two of the most valued classical social theorists – Durkheim and Marx – have influenced theories of crime causation. In doing so, I reveal that classical social theory continues to be relevant in the advancement of criminological thought. Identifying this lineage is crucial in developing more informed research and policy on crime and social control, which is especially important given the widespread interest in crime and delinquency among students (and citizens more generally).
Concurrent Bartonella henselae infection in a dog with panniculitis and owner with ulcerated nodular skin lesions
Authors: Rossi Michael A. , Balakrishnan Nandhakumar , Linder Keith E. , Messa Jacqueline B. , Breitschwerdt Edward B. 
Published: October 2014

BackgroundBartonella henselae, a Gram‐negative, zoonotic Alphaproteobacteria that infects erythrocytes, endothelial cells and dendritic cells, has previously been implicated as a cause of panniculitis in dogs and a human.Animal and ownerAn 8‐year‐old, spayed female Labrador retriever and its 78‐year‐old male owner living in the same household.Methods and resultsWhen preliminary and advanced testing failed to identify the cause of near‐simultaneous‐onset dermatological lesions, Bartonella serology, Bartonella Alphaproteobacteria growth medium (BAPGM) enrichment blood culture/PCR and immunohistochemistry were used to test specimens from the dog and owner. Bartonella henselae, genotype San Antonio 2 DNA was amplified and sequenced from the man's BAPGM enrichment blood culture and the dog's panniculitis lesion. The bacterium was visualized by immunohistochemistry in the dog's panniculitis lesion; however, neither the dog nor the owner was B. henselae seroreactive. Antibiotic therapy elicited dermatological improvement in both dog and owner.Conclusions and clinical importanceBartonella henselae is an emerging zoonotic pathogen that induces granulomatous inflammatory lesions in various tissues of animals, including humans. We conclude that this bacterium had a contributory or causative role in the development of the dermatological lesions in the dog and owner.
Contrast‐enhanced multidetector computed tomography to diagnose pulmonary thromboembolism in an awake dog with pyothorax
Authors: Ngwenyama Thandeka R. , Herring Jennifer M. , O'Brien Mauria , Hartman Susan K. , Galloway Kimberly A. , O'Brien Robert T. 
Published: October 2014

AbstractObjectivesTo (1) describe the use of contrast‐enhanced multidetector computed tomography (CE‐MDCT) for identifying pulmonary thromboembolism (PTE) in an awake dog with pyothorax, (2) report the first documented case of PTE associated with pyothorax in veterinary medicine, and (3) review diagnostic imaging modalities and therapeutic options for PTE.Case SummaryA 5‐year, 4‐month‐old female neutered Labrador Retriever was presented for respiratory distress secondary to a pyothorax. The dog underwent thoracic exploratory surgery in which no underlying etiology was identified. Aerobic bacterial culture grewStreptococcus canis. The patient remained hypoxemic despite thoracocentesis and surgery. CE‐MDCT was performed without general anesthesia and showed luminal‐filling defects in the right cranial and right and left caudal lobar primary pulmonary arteries consistent with PTE. Anticoagulant therapy using unfractionated heparin was initiated. The dog responded well and was discharged 3 days postoperatively.New or Unique Information ProvidedTo the authors’ knowledge, this is the first reported case of PTE diagnosed in a dog with pyothorax using CE‐MDCT.
Computing symmetry groups of polyhedra
Authors: Bremner David , Dutour Sikirić Mathieu , Pasechnik Dmitrii V. , Rehn Thomas , Schürmann Achill 
Published: October 2014

AbstractKnowing the symmetries of a polyhedron can be very useful for the analysis of its structure as well as for practical polyhedral computations. In this note, we study symmetry groups preserving the linear, projective and combinatorial structure of a polyhedron. In each case we give algorithmic methods to compute the corresponding group and discuss some practical experiences. For practical purposes the linear symmetry group is the most important, as its computation can be directly translated into a graph automorphism problem. We indicate how to compute integral subgroups of the linear symmetry group that are used, for instance, in integer linear programming.
An investigation into the role of alcohol in self-harm in rural Sri Lanka: a protocol for a multimethod, qualitative study
Authors: Sørensen Jane Brandt , Rheinländer Thilde , Sørensen Birgitte Refslund , Pearson Melissa , Agampodi Thilini , Siribaddana Sisira , Konradsen Flemming 
Published: October 2014

IntroductionSri Lanka has one of the highest suicide and self-harm rates in the world and although alcohol has been found to be a risk factor for self-harm in Sri Lanka, we know little about the connection between the two. This paper comprises a protocol for a qualitative study investigating alcohol's role in self-harm in rural Sri Lanka at three levels: the individual, community and policy level. The analysis will bring new understanding of the link between alcohol and self-harm in Sri Lanka, drawing on structural, cultural and social concepts. It will equip researchers, health systems and policy makers with vital information for developing strategies to address alcohol-related problems as they relate to self-harm.Methods and analysisTo capture the complexity of the link between alcohol and self-harm in the Anuradhapura district in the North Central Province in Sri Lanka, qualitative methods will be utilised. Specifically, the data will consist of serial narrative life-story interviews with up to 20 individuals who have non-fatally self-harmed and where alcohol directly or indirectly was involved in the incidence as well as with their significant others; observations in communities and families; six focus group discussions with community members; and key-informant interviews with 15–25 stakeholders who have a stake in alcohol distribution, marketing, policies, prevention and treatment as they relate to self-harm.Ethics and disseminationThe study has received ethical approval from the Ethical Review Committee of the Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka. A sensitive data collection technique will be used and ethical issues will be considered throughout the study.ResultsThe results will be disseminated in scientific peer-reviewed articles in collaboration with Sri Lankan and other international research partners.