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Zooplankton excretion metabolites stimulate Southern Ocean phytoplankton growth

Warming over Antarctica is leading to changes in the zooplankton communities inhabiting the Southern Ocean. It has been observed that zooplankton not only regulates phytoplankton through grazing, but also through the recycling of nutrients that are essential for phytoplankton growth. In this way, the effects of warming on zooplankton populations will change the amount or proportion ...

Motion of a Swinging Atwood’s Machine: Simulation and Analysis with Mathematica

A generalized model of the Atwood machine when one body is constrained to move along a vertical axis while the other one can swing in a plane is considered. Combining symbolic and numerical calculations, we have obtained equations of motion of the system and analyzed their solutions. We have shown that oscillation can completely modify a motion of the system while the simple Atwood ...

Genetic analysis of RNF213 p.R4810K variant in non-moyamoya intracranial artery stenosis/occlusion disease in a Chinese population

Objectives RNF213 p.R4810K was identified as a susceptibility variant for moyamoya disease in Asia and non-moyamoya intracranial artery stenosis/occlusion disease in Japan and Korea recently. The occurrence of this variant was evaluated in patients with non-moyamoya intracranial artery stenosis/occlusion disease in China. Methods Two study populations were used in this study. One ...

Identification of proteins differentially expressed by Chlamydia trachomatis treated with chlamydiaphage capsid protein VP1 during intracellular growth

Chlamydia trachomatis infection is one of the most prevalent sexually transmitted diseases. Our research pertains to the inhibitory effect and molecular mechanism of the chlamydiaphage capsid protein VP1 on the growth of Chlamydia trachomatis. In this research, the capsid protein VP1 of the guinea-pig conjunctivitis chlamydiaphage phiCPG1 was expressed, purified and identified, and ...

A pan-neotropical analysis of hunting preferences

Hunting in the neotropics is a widespread form of resource extraction. However, there is increasing concern that current activities are leading to the decline and extirpation of vulnerable species; particulary ateline primates, large ungulates (such as tapirs and white-lipped peccaries) and large birds such as curassows. Hunting patterns are expected to be a product of two ...

The Environmental Costs of Water Flow Regulation: an Innovative Approach Based on the ‘Polluter Pays’ Principle

The EU Water Framework Directive (WFD) explicitly requires the full cost recovery of water services, including the environmental costs incurred from the damage that water uses inflict on the environment. Although flow regulation by river damming is one of the most prominent human impact on fresh water ecosystems its environmental costs are not properly included in water pricing. ...

Mixed signals: The effect of conflicting reward- and goal-driven biases on selective attention

Attentional selection depends on the interaction between exogenous (stimulus-driven), endogenous (goal-driven), and selection history (experience-driven) factors. While endogenous and exogenous biases have been widely investigated, less is known about their interplay with value-driven attention. The present study investigated the interaction between reward-history and goal-driven ...

Cardiovascular effects of linalyl acetate in acute nicotine exposure

Backgroud Smoking is a risk factor for cardiovascular diseases as well as pulmonary dysfunction. In particular, adolescent smoking has been reported to have a higher latent risk for cardiovascular disease. Despite the risk to and vulnerability of adolescents to smoking, the mechanisms underlying the effects of acute nicotine exposure on adolescents remain unknown. This study ...

Radiological imaging of teratological fetuses: what can we learn?

Objectives To determine the advantages of radiological imaging of a collection of full-term teratological fetuses in order to increase their scientific and educational value. Background Anatomical museums around the world exhibit full-term teratological fetuses. Unfortunately, these museums are regularly considered as “morbid cabinets”. Detailed dysmorphological information ...

Comments on birchbark documents found in the twenty-first century

This article presents a general overview and highlights some specific features of the birchbark texts that are included in the twelfth volume of the series Novgorodskie gramoty na bereste. This volume offers full critical editions of all texts found in Novgorod and Staraja Russa between 2001 and 2014. My chief goal is to scrutinize systematically the wealth of new information and ...

A “fractal” solution to the chopstick auction

This paper constructs a novel equilibrium in the chopstick auction of Szentes and Rosenthal (Games Econ Behav 44(1):114–133, 2003a). In contrast to the existing solution, the identified equilibrium strategy allows a simple and intuitive characterization. Moreover, its best-response set has the same Hausdorff dimension as its support, which may be seen as a robustness property. The ...

Effectiveness of Antibiotic Prophylaxis in Non-emergency Cholecystectomy Using Data from a Population-Based Cohort Study

Background There is a variation in the administration of antibiotics prophylaxis to reduce the perceived risk of SSI in patients undergoing non-emergency cholecystectomy. The aim of this study was to determine the effectiveness of antibiotic prophylaxis following non-emergency cholecystectomy to prevent 30-day superficial surgical site infections (SSIs) using non-selected, ...

Management paraophthalmischer Aneurysmen

Hintergrund Aneurysmen der Hirngefäße sind relativ häufig und Aneurysmen des ophthalmischen Segments der A. carotis interna (ICA) machen ungefähr 10 % der intrakraniellen Aneurysmen aus. Die Ruptur eines paraophthalmischen Aneurysmas kann zu einer unter Umständen lebensbedrohlichen intrakraniellen Blutung führen. Durch Druck auf den benachbarten N. opticus kann eine Sehstörung ...

Measuring hemophilia caregiver burden: validation of the Hemophilia Caregiver Impact measure

Aims The purpose of this article is to describe the psychometric development of the Hemophilia Caregiver Impact measure. Methods Qualitative interviews (n = 22) and a cross-sectional web-based study (n = 458) were implemented with caregivers of people with hemophilia. Classical test theory and item response theory analyses were implemented to evaluate the psychometric ...

WIP1 phosphatase as pharmacological target in cancer therapy

DNA damage response (DDR) pathway protects cells from genome instability and prevents cancer development. Tumor suppressor p53 is a key molecule that interconnects DDR, cell cycle checkpoints, and cell fate decisions in the presence of genotoxic stress. Inactivating mutations in TP53 and other genes implicated in DDR potentiate cancer development and also influence the sensitivity ...

Stealth dicing of sapphire wafers with near infra-red femtosecond pulses

The quality of the reflecting faces after dicing is critical for the fabrication of efficient and stable laser diodes emitting in the green–violet region. However, high-quality faces can be difficult to achieve for devices grown on a sapphire substrate as this material is difficult to cleave cleanly. We have therefore investigated a technology known as “stealth dicing”. The ...

A mutation in pssE affects exopolysaccharide synthesis by Rhizobium leguminosarum bv. trifolii, its surface properties, and symbiosis with clover

Background and aims A considerable majority of the proteins involved in exopolysaccharide synthesis in Rhizobium leguminosarum bv. trifolii are encoded by pss genes located in a large chromosomal region named Pss-I. The aim of this work was to characterize the phenotypic and symbiotic properties of strain Rt1933, which has a mutation in pssE. This gene encodes an enzyme responsible ...

Occupational heat stress assessment and protective strategies in the context of climate change

Global warming will unquestionably increase the impact of heat on individuals who work in already hot workplaces in hot climate areas. The increasing prevalence of this environmental health risk requires the improvement of assessment methods linked to meteorological data. Such new methods will help to reveal the size of the problem and design appropriate interventions at ...

Polyhedral Omega: a New Algorithm for Solving Linear Diophantine Systems

Polyhedral Omega is a new algorithm for solving linear Diophantine systems (LDS), i.e., for computing a multivariate rational function representation of the set of all non-negative integer solutions to a system of linear equations and inequalities. Polyhedral Omegacombines methods from partition analysis with methods from polyhedral geometry. In particular, we combine MacMahon’s ...

Precise orbit determination of the Fengyun-3C satellite using onboard GPS and BDS observations

The GNSS Occultation Sounder instrument onboard the Chinese meteorological satellite Fengyun-3C (FY-3C) tracks both GPS and BDS signals for orbit determination. One month’s worth of the onboard dual-frequency GPS and BDS data during March 2015 from the FY-3C satellite is analyzed in this study. The onboard BDS and GPS measurement quality is evaluated in terms of data quantity as ...

Is color an integral part of a rich mental simulation?

Research suggests that language comprehenders simulate visual features such as shape during language comprehension. In sentence-picture verification tasks, whenever pictures match the shape or orientation implied by the previous sentence, responses are faster than when the pictures mismatch implied visual aspects. However, mixed results have been demonstrated when the ...

Performances of Model Selection Criteria When Variables are Ill Conditioned

Model selection criteria are often used to find a “proper” model for the data under investigation when building models in cases in which the dependent or explained variables are assumed to be functions of several independent or explanatory variables. For this purpose, researchers have suggested using a large number of such criteria. These criteria have been shown to act ...