bluuebunny/crossref_metadata_2025_split huggingface dataset:
Constant hydraulic supply enables optical monitoring of transpiration in a grass, a herb, and a conifer
Authors: Bourbia Ibrahim , Lucani Christopher , Brodribb Timothy J 
Published: June 2022

Abstract
Plant transpiration is an inevitable consequence of photosynthesis and has a huge impact on the terrestrial carbon and water cycle, yet accurate and continuous monitoring of its dynamics is still challenging. Under well-watered conditions, canopy transpiration (Ec) could potentially be continuously calculated from stem water potential (Ψstem), but only if the root to stem hydraulic conductance (Kr-s) remains constant and plant capacitance is relatively small. We tested whether such an approach is viable by investigating whether Kr-s remains constant under a wide range of daytime transpiration rates in non-water-stressed plants. Optical dendrometers were used to continuously monitor tissue shrinkage, an accurate proxy of Ψstem, while Ec was manipulated in three species with contrasting morphological, anatomical, and phylogenetic identities: Tanacetum cinerariifolium, Zea mays, and Callitris rhomboidea. In all species, we found Kr-s to remain constant across a wide range of Ec, meaning that the dynamics of Ψstem could be used to monitor Ec. This was evidenced by the close agreement between measured Ec and that predicted from optically measured Ψstem. These results suggest that optical dendrometers enable both plant hydration and Ec to be monitored non-invasively and continuously in a range of woody and herbaceous species. This technique presents new opportunities to monitor transpiration under laboratory and field conditions in a diversity of woody, herbaceous, and grassy species.
Visible, near-infrared and mid-infrared spectra of solid O2 at 6–33 K
Authors: Lo Jen-Iu , Lu Hsiao-Chi , Hung Wei-Hsiu , Ogilvie J F , Cheng Bing-Ming 
Published: June 2022

ABSTRACT
We report spectra in the visible and near-infrared wavelength range 350–1155 nm and in the mid-infrared range 500–5000 cm–1 (2–20 $\mu$m) of molecular oxygen at temperatures 6–33 K. In mid-infrared spectra, a sharp line at 1552.4 cm–1 was observed at a deposition temperature of 6 K. The intensity, profile and position of this feature depended sensitively upon the deposition temperature as a result of a connection with lattice imperfections; instead, a triplet feature at 1545.7, 1548.1 and 1549.6 cm–1 appeared at temperatures 9 and 12 K, but disappeared at 18, 24 and 30 K. Additional infrared lines of solid α-O2 were observed at 1591 and 1617 cm–1, which exhibited a reversible behaviour through the α–β phase transition temperature at 24 K. The transmissions of solid O2 showed nearly no change in wavenumber range 500–2000 cm–1 (5–20 $\mu$m) at temperatures 6–33 K; above 2000 cm–1 (&lt;5 $\mu$m), the transmission of solid O2 depended strongly on temperature. Roughly, the transmission of solid O2 at temperatures 6–21 K fluctuated slightly in the visible and near-infrared region, whereas it decreased greatly at 24 K and continuously diminished further at higher temperatures. Notably, a broad absorption of solid β-O2 was observed in the wavelength region 350–700 nm at temperatures 27, 30 and 33 K.
Experimental study of the removal of excited state phosphorus atoms by H2O and H2: implications for the formation of PO in stellar winds
Authors: Douglas Kevin M , Gobrecht David , Plane John M C 
Published: June 2022

ABSTRACTThe reactions of the low-lying metastable states of atomic phosphorus, P(2D) and P(2P), with H2O and H2 were studied by the pulsed laser photolysis at 248 nm of PCl3, combined with laser-induced fluorescence detection of P(2D), P(2P), and PO. Rate coefficients between 291 and 740 K were measured, along with a yield for the production of PO from P(2D or 2P) + H2O of (35 ± 15) %. H2 reacts with both excited P states relatively efficiently; physical (i.e. collisional) quenching, rather than chemical reaction to produced PH + H, is shown to be the more likely pathway. A comprehensive phosphorus chemistry network is then developed using a combination of electronic structure theory calculations and a Master Equation treatment of reactions taking place over complex potential energy surfaces. The resulting model shows that at the high temperatures within two stellar radii of a MIRA variable AGB star in oxygen-rich conditions, collisional excitation of ground-state P(4S) to P(2D), followed by reaction with H2O, is a significant pathway for producing PO (in addition to the reaction between P(4S) and OH). The model also demonstrates that the PN fractional abundance in a steady (non-pulsating) outflow is underpredicted by about 2 orders of magnitude. However, under shocked conditions where sufficient thermal dissociation of N2 occurs at temperatures above 4000 K, the resulting N atoms convert a substantial fraction of PO into PN.
Extinguishing the FIRE: environmental quenching of satellite galaxies around Milky Way-mass hosts in simulations
Authors: Samuel Jenna , Wetzel Andrew , Santistevan Isaiah , Tollerud Erik , Moreno Jorge , Boylan-Kolchin Michael , Bailin Jeremy , Pardasani Bhavya 
Published: June 2022

ABSTRACT
The star formation and gas content of satellite galaxies around the Milky Way (MW) and Andromeda (M31) are depleted relative to more isolated galaxies in the Local Group (LG) at fixed stellar mass. We explore the environmental regulation of gas content and quenching of star formation in z = 0 galaxies at $M_{*}=10^{5\!-\!10}\, \rm {M}_{\odot }$ around 14 MW-mass hosts from the Feedback In Realistic Environments 2 (FIRE-2) simulations. Lower mass satellites ($M_{*}\lesssim 10^7\, \rm {M}_{\odot }$) are mostly quiescent and higher mass satellites ($M_{*}\gtrsim 10^8\, \rm {M}_{\odot }$) are mostly star forming, with intermediate-mass satellites ($M_{*}\approx 10^{7\!-\!8}\, \rm {M}_{\odot }$) split roughly equally between quiescent and star forming. Hosts with more gas in their circumgalactic medium have a higher quiescent fraction of massive satellites ($M_{*}=10^{8\!-\!9}\, \rm {M}_{\odot }$). We find no significant dependence on isolated versus paired (LG-like) host environments, and the quiescent fractions of satellites around MW-mass and Large Magellanic Cloud (LMC)-mass hosts from the FIRE-2 simulations are remarkably similar. Environmental effects that lead to quenching can also occur as pre-processing in low-mass groups prior to MW infall. Lower mass satellites typically quenched before MW infall as central galaxies or rapidly during infall into a low-mass group or a MW-mass galaxy. Most intermediate- to high-mass quiescent satellites have experienced ≥1–2 pericentre passages (≈2.5–5 Gyr) within a MW-mass halo. Most galaxies with $M_{*}\gtrsim 10^{6.5}\, \rm {M}_{\odot }$ did not quench before falling into a host, indicating a possible upper mass limit for isolated quenching. The simulations reproduce the average trend in the LG quiescent fraction across the full range of satellite stellar masses. Though the simulations are consistent with the Satellites Around Galactic Analogs (SAGA) survey’s quiescent fraction at $M_{*}\gtrsim 10^8\, \rm {M}_{\odot }$, they do not generally reproduce SAGA’s turnover at lower masses.
Constraining f(R) models with cosmic chronometers and the H ii galaxy Hubble diagram
Authors: Sultana Joseph , Yennapureddy Manoj K , Melia Fulvio , Kazanas Demosthenes 
Published: June 2022

ABSTRACT
We consider several well-known f(R) cosmological models and constrain their parameters, namely the deviation parameter b and the cosmological parameters Ωm and h. We first obtain analytical approximations for the Hubble rate H(z) and the luminosity distance dL(z) in terms of these parameters, and then test these against the observational expansion rate derived from cosmic chronometers (CCs) and the distance modulus in the H ii galaxy Hubble diagram, obtained in a model-independent way using Gaussian processes. We first optimize the models based solely on the CCs and then repeat this process with a joint analysis using both the CCs and H ii galaxies.
The formation of low surface brightness galaxies in the IllustrisTNG simulation
Authors: Pérez-Montaño Luis Enrique , Rodriguez-Gomez Vicente , Cervantes Sodi Bernardo , Zhu Qirong , Pillepich Annalisa , Vogelsberger Mark , Hernquist Lars 
Published: June 2022

ABSTRACT
We explore the nature of low surface brightness galaxies (LSBGs) in the hydrodynamic cosmological simulation TNG100 of the IllustrisTNG project, selecting a sample of LSBGs (r band effective surface brightness μr &gt; 22.0 mag arcsec−2) at z = 0 over a wide range of stellar masses (M* = 109–1012 M⊙). We find LSBGs of all stellar masses, although they are particularly prevalent at M* &lt; 1010 M⊙. We show that the specific star formation rates of LSBGs are not significantly different from those of high surface brightness galaxies (HSBGs) but that, as a population, LSBGs are systematically less massive and more extended than HSBGs, and tend to display late-type morphologies according to a kinematic criterion. At fixed stellar mass, we find that haloes hosting LSBGs are systematically more massive and have a higher baryonic fraction than those hosting HSBGs. We find that LSBGs have higher stellar specific angular momentum and halo spin parameter values compared to HSBGs, as suggested by previous works. We track the evolution of these quantities back in time, finding that the spin parameters of the haloes hosting LSBGs and HSBGs exhibit a clear bifurcation at z ∼ 2, which causes a similar separation in the evolutionary tracks of other properties such as galactic angular momentum and effective radius, ultimately resulting in the values observed at z = 0. The higher values of specific stellar angular momentum and halo spin in LSBGs seem to be responsible for their extended nature, preventing material from collapsing into the central regions of the galaxies, and also causing LSBGs to host less massive black holes at their centres.
On the synthesis of heavy nuclei in protomagnetar outflows and implications for ultra-high energy cosmic rays
Authors: Bhattacharya Mukul , Horiuchi Shunsaku , Murase Kohta 
Published: June 2022

ABSTRACT
It has been suggested that strongly magnetized and rapidly rotating protoneutron stars (PNSs) may produce long duration gamma-ray bursts (GRBs) originating from stellar core collapse. We explore the steady-state properties and heavy element nucleosynthesis in neutrino-driven winds from such PNSs whose magnetic axis is generally misaligned with the axis of rotation. We consider a wide variety of central engine properties such as surface dipole field strength, initial rotation period, and magnetic obliquity to show that heavy element nuclei can be synthesized in the radially expanding wind. This process is facilitated provided the outflow is Poynting-flux dominated such that its low entropy and fast expansion time-scale enables heavy nuclei to form in a more efficient manner as compared to the equivalent thermal GRB outflows. We also examine the acceleration and survival of these heavy nuclei and show that they can reach sufficiently high energies ≳ 1020 eV within the same physical regions that are also responsible for powering gamma-ray emission, primarily through magnetic dissipation processes. Although these magnetized outflows generally fail to achieve the production of elements heavier than lanthanides for our explored electron fraction range 0.4–0.6, we show that they are more than capable of synthesizing nuclei near and beyond iron peak elements.
Unmet Needs in Oncology Clinical Research and Treatment in Africa: Focus on Ghana
Authors: Roberts Lewis R , Rivers Brian M , Yates Clayton C , Newman Lisa A , Sarkodie Benjamin D , Davis Melissa B , Asare-Aboagye Yaw , Adjei Alex A , Harris Adalynn E , Awuah Baffour 
Published: June 2022

Abstract
Cancer incidence is increasing worldwide and is a major cause of mortality. The relative magnitude of the increase is remarkably high in low human development index (HDI; 95%) and medium HDI (64%) countries. On the African continent, a corresponding increase in cancer burden is predicted, particularly for sub-Saharan Africa. Current epidemiologic data indicate that mortality rates of certain cancers, such as breast and cervical cancers, in sub-Saharan Africa are the highest in the world, and the cancer risks are broadly comparable to the risks in high-income countries, such as the United States and Europe. Although emerging data alludes to the unique genetic profile of cancer in African populations, most cancer therapies are introduced to Africa without confirmatory clinical trials. Therefore, there is an increasing need for clinical trials directed toward prevention, screening, diagnosis, and identification of innovative treatments in the African context. This review will discuss the increasing cancer burden in Africa, with a particular focus on Ghana, unmet clinical needs in cancer, current medical systems, clinical trial regulatory systems, and challenges to clinical trial recruitment.
A global two-layer radiative transfer model for axisymmetric, shadowed protoplanetary disks
Authors: Okuzumi Satoshi , Ueda Takahiro , Turner Neal J 
Published: June 2022

Abstract
Understanding the thermal structure of protoplanetary disks is crucial for modeling planet formation and interpreting disk observations. We present a new two-layer radiative transfer model for computing the thermal structure of axisymmetric irradiated disks. Unlike the standard two-layer model, our model accounts for the radial as well as vertical transfer of the starlight reprocessed at the disk surface. The model thus allows us to compute the temperature below “shadowed” surfaces receiving no direct starlight. Thanks to the assumed axisymmetry, the reprocessed starlight flux is given in a one-dimensional integral form that can be computed at a low cost. Furthermore, our model evolves the midplane temperature using a time-dependent energy equation and can therefore treat thermal instabilities. We apply our global two-layer model to disks with a planetary induced gap and confirm that the model reproduces the disks’ temperature profiles obtained from more computationally expensive Monte Carlo radiative transfer calculations to an accuracy of less than 20%. We also apply the model to study the long-term behavior of the thermal wave instability in irradiated disks. Being simple and computationally efficient, the global two-layer model will be suitable for studying the interplay between disks’ thermal evolution and dust evolution.
A Non-Canonical MITE in the WOX11 Promoter Is Associated with Robust Crown Root development in Rice
Authors: Zhang Ting , Xiang Yimeng , Geng Leping , Jiang Wei , Cheng Saifeng , Zhao Yu 
Published: June 2022

Abstract
The formation of tissues and organs in multicellular organisms is tightly controlled by transcriptional programs determined by temporal and spatial patterns of gene expression. As an important regulator of rice crown root development, WOX11 is essential for crown root formation and its transcript level is positively correlated with crown root biomass. However, how WOX11 is regulated during crown root primordium emergence and outgrowth still remains unknown. In this study, variations of the WOX11 genomic sequence were analyzed, and the highest genetic diversity was found within its promoter, which contained a non-canonical miniature inverted-repeat transposable element (ncMITE) sequence. Analysis of the WOX11 promoter-driven reporter gene GUS (β-glucuronidase) transgenic plants pWOX11(ncMITE+):GUS and pWOX11(ncMITE−):GUS uncovered higher GUS expression levels in crown roots of pWOX11(ncMITE+):GUS plants. Furthermore, pWOX11(ncMITE+):WOX11-FLAG in wox11 background could complement the crown root number and length compared to those of the wild type, while pWOX11(ncMITE−):WOX11-FLAG could not. These results suggested that the ncMITE was positively associated with WOX11 transcripts in rice crown roots. In addition, DNA methylation nearby the ncMITE region attenuated the activation effect of the ncMITE on WOX11 expression, which might also be the cause conferred to the root-specific expression of WOX11. This work provides novel insight into WOX11 expression regulation and reveals a promising target for genetic improvement of root architecture in rice.
Tonoplast Sucrose Trafficking Modulates Starch Utilization and Water Deficit Behavior in Poplar Leaves
Authors: Harding Scott A , Tuma Trevor T , Aulakh Kavita , Ortega Maria A , Ci Dong , Ou Yongbin , Tsai Chung-Jui 
Published: June 2022

Abstract
Leaf osmotic adjustment by the active accrual of compatible organic solutes (e.g. sucrose) contributes to drought tolerance throughout the plant kingdom. In Populus tremula x alba, PtaSUT4 encodes a tonoplast sucrose–proton symporter, whose downregulation by chronic mild drought or transgenic manipulation is known to increase leaf sucrose and turgor. While this may constitute a single drought tolerance mechanism, we now report that other adjustments which can occur during a worsening water deficit are damped when PtaSUT4 is constitutively downregulated. Specifically, we report that starch use and leaf relative water content (RWC) dynamics were compromised when plants with constitutively downregulated PtaSUT4 were subjected to a water deficit. Leaf RWC decreased more in wild-type and vector control lines than in transgenic PtaSUT4-RNAi (RNA-interference) or CRISPR (clustered regularly interspersed short palindromic repeats) knockout (KO) lines. The control line RWC decrease was accompanied by increased PtaSUT4 transcript levels and a mobilization of sucrose from the mesophyll-enriched leaf lamina into the midvein. The findings suggest that changes in SUT4 expression can increase turgor or decrease RWC as different tolerance mechanisms to reduced water availability. Evidence is presented that PtaSUT4-mediated sucrose partitioning between the vacuole and the cytosol is important not only for overall sucrose abundance and turgor, but also for reactive oxygen species (ROS) and antioxidant dynamics. Interestingly, the reduced capacity for accelerated starch breakdown under worsening water-deficit conditions was correlated with reduced ROS in the RNAi and KO lines. A role for PtaSUT4 in the orchestration of ROS, antioxidant, starch utilization and RWC dynamics during water stress and its importance in trees especially, with their high hydraulic resistances, is considered.
The Geochemical and Textural Transition between the Reef Package and its Hanging Wall, Stillwater Complex, Montana, USA
Authors: Jenkins M Christopher , Mungall James E , Zientek Michael L , Butak Kevin , Corson Sam , Holick Paul , McKinley Ryan , Lowers Heather 
Published: June 2022

Abstract
The highest grade Pd-Pt deposit on Earth, the J-M Reef, is hosted in coarse-grained to pegmatoidal cumulates called the Reef Package. Decades of mine development of the J-M Reef have revealed that a distinct discontinuity in rock fabric marks the top of the rock unit that hosts economic-grade sulfide mineralization. Mine geologists refer to this discontinuity as the hanging wall contact. This contact is the top of the Reef Package and is always locatable—either by the change in rock fabric or by distinctive hanging wall textures of silicate minerals—even when the reef sulfide mineralization is absent. This rather subtle textural feature is used reliably by mine geologists to follow the Reef during exploration and mine development. Although some high tenor sulfides (&gt;1000 ppm Pd in 100% sulfide) are found sporadically in the hanging wall cumulates, these accumulations are too small to be economically viable. We present quantitative rock fabric data for four Reef Package and hanging wall intersections collected by electron back-scattered diffraction (EBSD). Plagioclase fabrics in the hanging wall are characterized by low variance in grain sizes and a strong point maximum concentration of (010) and a perpendicular girdle distribution of [100] consistent with an axial B-type fabric. These fabrics are indicative of either compaction of the crystal mush or crystal settling of nucleated crystals, the bulk magma in a chamber. Conversely, the fabrics of the Reef Package show higher variance grain in size distributions and weak to undeveloped preferred orientation of plagioclase crystals that did not undergo significant alignment or textural equilibration of plagioclase grains. The absence of foliation in the Reef Package stands in contrast both to hanging wall fabrics and to other reported EBSD datasets of plagioclase crystals orientations from the Bushveld Complex, the Skaergaard Intrusion, and the Rum Intrusion. Furthermore, plagioclase crystal size distributions for the Reef Package show flatter slopes and convex profiles with fewer crystals at small size fractions indicating the dissolution of small crystals during partial melting and textural coarsening (i.e. Ostwald ripening) and crystal growth. Crystal growth was favored over the nucleation of new crystals during prolonged interaction with a hot infiltrating melt into the resident mush resulting in the coarse-grained textures of the Reef Package cumulates. The hanging wall contact represents a boundary between partially remelted crystal mush of the Reef Package, where sulfide mineralization formed and accumulated, and an overlying essentially barren cumulate pile. The hanging wall cumulates formed following the cessation of footwall erosion and the resumption of crystal accumulation by normal magma chamber processes.
The Hypnotic Screen: The Early Soviet Experiment with Film Psychotherapy
Authors: Toropova Anna 
Published: June 2022

Summary
The early Soviet period witnessed a number of experiments in ‘film psychotherapy’—the attempt to deploy the cinematic medium in hypnotherapeutic treatment. Exploring this pivotal, yet virtually unknown, moment in the history of cinema’s intertwinement with medicine, the article seeks to understand Soviet film psychotherapy as a response to transnational anxieties over cinema’s ‘powers of influence’, as well as a distinctively ‘Soviet’ experiment. An exploration of the project’s origins in Soviet psychophysiological studies of spectators and experiments in group hypnotherapeutic treatment is used to demonstrate the unique context that shaped Soviet doctors’ emergence as film therapy pioneers. After examining the medical and political hopes pinned on the project, the article tries to understand the reasons why film psychotherapy’s considerable potential remained largely unrealised. The project that promised to be a major boon to Soviet social medicine, it is argued, also brought the scientific premises of Soviet psychotherapy into question.