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https://www.readbyqxmd.com/read/28109118/a-mandible-from-the-middle-pleistocene-hexian-site-and-its-significance-in-relation-to-the-variability-of-asian-homo-erectus
#1
Wu Liu, María Martinón-Torres, Yousuke Kaifu, Xiujie Wu, Reiko T Kono, Chun-Hsiang Chang, Pianpian Wei, Song Xing, Wanbo Huang, José María Bermúdez de Castro
OBJECTIVES: This study presents the first detailed morphological description and comparison of a Middle Pleistocene hominin mandibular fragment (PA 831) and associated teeth from the Hexian site in Eastern China. We aim to investigate where the Hexian mandible fits within the genus Homo variability in the light of an increased and better characterized Asian fossils record. METHODS: Comparative samples include Pleistocene Homo mandibles and teeth from Africa, Asia, and Europe, as well as earlier African hominins (Australopithecus and early Homo) and Holocene recent humans...
January 21, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28107505/septic-systems-contribution-to-phosphorus-in-shallow-groundwater-field-scale-studies-using-conventional-drainfield-designs
#2
Sara Mechtensimer, Gurpal S Toor
Septic systems can be a potential source of phosphorus (P) in groundwater and contribute to eutrophication in aquatic systems. Our objective was to investigate P transport from two conventional septic systems (drip dispersal and gravel trench) to shallow groundwater. Two new in-situ drainfields (6.1 m long by 0.61 m wide) with a 3.72 m2 infiltrative surface were constructed. The drip dispersal drainfield was constructed by placing 30.5 cm commercial sand on top of natural soil and the gravel trench drainfield was constructed by placing 30...
2017: PloS One
https://www.readbyqxmd.com/read/28107398/integrated-chronology-flora-and-faunas-and-paleoecology-of-the-alajuela-formation-late-miocene-of-panama
#3
Bruce J MacFadden, Douglas S Jones, Nathan A Jud, Jorge W Moreno-Bernal, Gary S Morgan, Roger W Portell, Victor J Perez, Sean M Moran, Aaron R Wood
The late Miocene was an important time to understand the geological, climatic, and biotic evolution of the ancient New World tropics and the context for the Great American Biotic Interchange (GABI). Despite this importance, upper Miocene deposits containing diverse faunas and floras and their associated geological context are rare in Central America. We present an integrated study of the geological and paleontological context and age of a new locality from Lago Alajuela in northern Panama (Caribbean side) containing late Miocene marine and terrestrial fossils (plants, invertebrates, and vertebrates) from the Alajuela Formation...
2017: PloS One
https://www.readbyqxmd.com/read/28107203/clinicopathological-significance-of-intratumoral-and-peritumoral-lymphocytes-and-lymphocyte-score-based-on-the-histologic-subtypes-of-cutaneous-melanoma
#4
Cheol Keun Park, Sang Kyum Kim
The presence of tumor infiltrating lymphocytes is a favorable prognostic factor in cutaneous melanoma, but their clinicopathological significance in the intratumoral compartment compared to the peritumoral compartment is unclear. We investigated the clinicopathologic significance of tumor-infiltrating lymphocytes and lymphocyte score in intra- and peritumoral compartments in 177 Korean patients who had undergone surgical excision of cutaneous melanoma. No significant correlation was observed between various clinicopathologic factors and the presence of intratumoral lymphocytes...
January 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/28106843/underwater-electromagnetic-sensor-networks-part-i-link-characterization
#5
Gara Quintana-Díaz, Pablo Mena-Rodríguez, Iván Pérez-Álvarez, Eugenio Jiménez, Blas-Pablo Dorta-Naranjo, Santiago Zazo, Marina Pérez, Eduardo Quevedo, Laura Cardona, J Joaquín Hernández
Underwater Wireless Sensor Networks (UWSNs) using electromagnetic (EM) technology in marine shallow waters are examined, not just for environmental monitoring but for further interesting applications. Particularly, the use of EM waves is reconsidered in shallow waters due to the benefits offered in this context, where acoustic and optical technologies have serious disadvantages. Sea water scenario is a harsh environment for radiocommunications, and there is no standard model for the underwater EM channel. The high conductivity of sea water, the effect of seabed and the surface make the behaviour of the channel hard to predict...
January 19, 2017: Sensors
https://www.readbyqxmd.com/read/28105939/evolution-of-mitochondrial-genomes-in-baikalian-amphipods
#6
Elena V Romanova, Vladimir V Aleoshin, Ravil M Kamaltynov, Kirill V Mikhailov, Maria D Logacheva, Elena A Sirotinina, Alexander Yu Gornov, Anton S Anikin, Dmitry Yu Sherbakov
BACKGROUND: Amphipods (Crustacea) of Lake Baikal are a very numerous and diverse group of invertebrates generally believed to have originated by adaptive radiation. The evolutionary history and phylogenetic relationships in Baikalian amphipods still remain poorly understood. Sequencing of mitochondrial genomes is a relatively feasible way for obtaining a set of gene sequences suitable for robust phylogenetic inferences. The architecture of mitochondrial genomes also may provide additional information on the mechanisms of evolution of amphipods in Lake Baikal...
December 28, 2016: BMC Genomics
https://www.readbyqxmd.com/read/28104795/magnetic-resonance-spectroscopy-of-an-atomically-thin-material-using-a-single-spin-qubit
#7
I Lovchinsky, J D Sanchez-Yamagishi, E K Urbach, S Choi, S Fang, T I Andersen, K Watanabe, T Taniguchi, A Bylinskii, E Kaxiras, P Kim, H Park, M D Lukin
Two-dimensional (2D) materials offer a promising platform for exploring condensed matter phenomena and developing technological applications. However, the reduction of material dimensions to the atomic scale poses a challenge for traditional measurement and interfacing techniques that typically couple to macroscopic observables. We demonstrate a method for probing the properties of 2D materials via nanometer-scale nuclear quadrupole resonance (NQR) spectroscopy using individual atom-like impurities in diamond...
January 19, 2017: Science
https://www.readbyqxmd.com/read/28104334/evaluation-of-factors-affecting-soil-carbon-sequestration-services-of-stormwater-wet-retention-ponds-in-varying-climate-zones
#8
L S Merriman, T L C Moore, J W Wang, D L Osmond, A M Al-Rubaei, A P Smolek, G T Blecken, M Viklander, W F Hunt
The carbon sequestration services of stormwater wet retention ponds were investigated in four different climates: U.S., Northern Sweden, Southern Sweden, and Singapore, representing a range of annual mean temperatures, growing season lengths and rainfall depths: geographic factors that were not statistically compared, but have great effect on carbon (C) accumulation. A chronosequence was used to estimate C accumulations rates; C accumulation and decomposition rates were not directly measured. C accumulated significantly over time in vegetated shallow water areas (0-30cm) in the USA (78...
January 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28102897/controls-on-methane-occurrences-in-shallow-aquifers-overlying-the-haynesville-shale-gas-field-east-texas
#9
Jean-Philippe Nicot, Toti Larson, Roxana Darvari, Patrick Mickler, Michael Slotten, Jordan Aldridge, Kristine Uhlman, Ruth Costley
Understanding the source of dissolved methane in drinking-water aquifers is critical for assessing potential contributions from hydraulic fracturing in shale plays. Shallow groundwater in the Texas portion of the Haynesville Shale area (13,000 km(2) ) was sampled (70 samples) for methane and other dissolved light alkanes. Most samples were derived from the fresh water bearing Wilcox formations and show little methane except in a localized cluster of 12 water wells (17% of total) in a approximately 30 × 30 km(2) area in Southern Panola County with dissolved methane concentrations less than 10 mg/L...
January 19, 2017: Ground Water
https://www.readbyqxmd.com/read/28101854/impurity-location-dependent-relaxation-dynamics-of-cu-cds-quantum-dots
#10
Dayeon Choi, Ji-Young Pyo, Du-Jeon Jang
Various types of 2% Cu-incorporated CdS (Cu:CdS) quantum dots (QDs) with very similar sizes have been prepared via a water soluble colloidal method. The locations of Cu impurities in CdS host nanocrystals have been controlled by adopting three different synthetic ways of doping, exchange, and adsorption to understand the impurity location-dependent relaxation dynamics of charge carriers. The oxidation state of incorporated Cu impurities has been found to be +1 and the band-gap energy of Cu:CdS QDs decreases as Cu2S forms at the surfaces of CdS QDs...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28100482/mitomycin-c-augmented-trabeculectomy-subtenon-injection-versus-soaked-sponges-a-randomised-clinical-trial
#11
Mohammad Pakravan, Hamed Esfandiari, Shahin Yazdani, Azadeh Douzandeh, Nassim Amouhashemi, Mehdi Yaseri, Parto Pakravan
BACKGROUND/AIMS: To compare the efficacy and safety of subtenon injection of mitomycin C (MMC) with that of conventional application of MMC-soaked sponges in trabeculectomy. METHODS: In this multicentre randomised clinical trial, 80 consecutive open-angle glaucoma cases were randomised into two groups; group 1 received a subtenon injection of 0.1 mL of 0.01% MMC, while group 2 received 0.02% MMC-soaked sponges. Primary outcome measure was intraocular pressure (IOP), and secondary outcome measures were endothelial cell count (ECC) changes and bleb morphology according to the Indiana Bleb Appearance Grading Scale...
January 18, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28100283/genetic-influences-on-hormonal-markers-of-chronic-hypothalamic-pituitary-adrenal-function-in-human-hair
#12
E M Tucker-Drob, A D Grotzinger, D A Briley, L E Engelhardt, F D Mann, M Patterson, C Kirschbaum, E K Adam, J A Church, J L Tackett, K P Harden
BACKGROUND: Cortisol is the primary output of the hypothalamic-pituitary-adrenal (HPA) axis and is central to the biological stress response, with wide-ranging effects on psychiatric health. Despite well-studied biological pathways of glucocorticoid function, little attention has been paid to the role of genetic variation. Conventional salivary, urinary and serum measures are strongly influenced by diurnal variation and transient reactivity. Recently developed technology can be used to measure cortisol accumulation over several months in hair, thus indexing chronic HPA function...
January 19, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28099150/elimination-of-quiescent-slow-cycling-cells-via-reducing-quiescence-depth-by-natural-compounds-purified-from-ganoderma-lucidum
#13
Jian Dai, Matthew A Miller, Nicholas J Everetts, Xia Wang, Peng Li, Ye Li, Jian-Hua Xu, Guang Yao
The medical mushroom Ganoderma lucidum has long been used in traditional Chinese medicine and shown effective in the treatment of many diseases including cancer. Here we studied the cytotoxic effects of two natural compounds purified from Ganoderma lucidum, ergosterol peroxide and ganodermanondiol. We found that these two compounds exhibited cytotoxicity not only against fast proliferating cells, but on quiescent, slow-cycling cells. Using a fibroblast cell-quiescence model, we found that the cytotoxicity on quiescent cells was due to induced apoptosis, and was associated with a shallower quiescent state in compound-treated cells, resultant from the increased basal activity of an Rb-E2F bistable switch that controls quiescence exit...
January 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28098236/wind-wave-behavior-in-fetch-and-depth-limited-estuaries
#14
Arash Karimpour, Qin Chen, Robert R Twilley
Wetland dominated estuaries serve as one of the most productive natural ecosystems through their ecological, economic and cultural services, such as nursery grounds for fisheries, nutrient sequestration, and ecotourism. The ongoing deterioration of wetland ecosystems in many shallow estuaries raises concerns about the contributing erosive processes and their roles in restraining coastal restoration efforts. Given the combination of wetlands and shallow bays as landscape components that determine the function of estuaries, successful restoration strategies require knowledge of wind wave behavior in fetch and depth limited water as a critical design feature...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098211/deep-sea-crustacean-trawling-fisheries-in-portugal-quantification-of-effort-and-assessment-of-landings-per-unit-effort-using-a-vessel-monitoring-system-vms
#15
Juan Bueno-Pardo, Sofia P Ramalho, Ana García-Alegre, Mariana Morgado, Rui P Vieira, Marina R Cunha, Henrique Queiroga
Mapping and quantifying bottom trawling fishing pressure on the seafloor is pivotal to understand its effects on deep-sea benthic habitats. Using data from the Vessel Monitoring System of crustacean trawlers along the Portuguese margin, we have identified the most exploited areas and characterized the most targeted habitats and water depths. We estimated a total trawling effort of 69596, 66766, and 63427 h y(-1) for the years 2012, 2013, and 2014 respectively which, considering the total landings estimated for this gear, yield values of 20...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097936/experimental-study-on-tissue-phantoms-to-understand-the-effect-of-injury-and-suturing-on-human-skin-mechanical-properties
#16
Arnab Chanda, Vinu Unnikrishnan, Zachary Flynn, Kim Lackey
Skin injuries are the most common type of injuries occurring in day-to-day life. A skin injury usually manifests itself in the form of a wound or a cut. While a shallow wound may heal by itself within a short time, deep wounds require surgical interventions such as suturing for timely healing. To date, suturing practices are based on a surgeon's experience and may vary widely from one situation to another. Understanding the mechanics of wound closure and suturing of the skin is crucial to improve clinical suturing practices and also to plan automated robotic surgeries...
January 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28097394/the-morphology-and-morphometry-of-the-fovea-capitis-femoris
#17
Vivek Perumal, Stephanie J Woodley, Helen D Nicholson
BACKGROUND: There is little published information on the anatomy of the fovea capitis femoris (FCF), the distal attachment site of the ligament of the head of femur (LHF). This study investigates the morphology of the FCF on dry bones in an attempt to answer some of the debate around the functional significance of the LHF. METHODS: The morphological and morphometric details of the FCF were analysed on 125 dry isolated femora (n = 125) from the Anatomy Museum, University of Otago, New Zealand...
January 17, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28097220/slab-temperature-controls-on-the-tonga-double-seismic-zone-and-slab-mantle-dehydration
#18
S Shawn Wei, Douglas A Wiens, Peter E van Keken, Chen Cai
Double seismic zones are two-layered distributions of intermediate-depth earthquakes that provide insight into the thermomechanical state of subducting slabs. We present new precise hypocenters of intermediate-depth earthquakes in the Tonga subduction zone obtained using data from local island-based, ocean-bottom, and global seismographs. The results show a downdip compressional upper plane and a downdip tensional lower plane with a separation of about 30 km. The double seismic zone in Tonga extends to a depth of about 300 km, deeper than in any other subduction system...
January 2017: Science Advances
https://www.readbyqxmd.com/read/28095552/a-prospective-split-face-study-of-the-picosecond-alexandrite-laser-with-specialized-lens-array-for-facial-photoaging-in-chinese
#19
Yiping Ge, Lifang Guo, Qiuju Wu, Mengli Zhang, Rong Zeng, Tong Lin
BACKGROUND: A 755nm picosecond alexandrite laser with a diffractive lens array has been reported for the treatment of acne scar and photoaging with clinical ef cacy. In this study, we evaluated the application of the 755nm picosecond alexandrite laser with a diffractive lens array for facial photoaging in Chinese. MATERIALS AND METHODS: Ten subjects with moderate facial photoaging were enrolled in a prospective, evaluator-blinded, open-label, and split-face trial to assess the ef cacy and safety of the 755nm picosecond alexandrite laser with a diffractive lens array for facial photoaging...
November 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28094394/complete-ultrafast-charge-carrier-dynamics-in-photo-excited-all-inorganic-perovskite-nanocrystals-cspbx3
#20
Navendu Mondal, Anunay Samanta
Understanding the nature and dynamics of the photo-induced transients of all-inorganic perovskite nanocrystals (NCs) is key to their exploitation in potential applications. In order to determine the nature of charge carriers, their deactivation pathways and dynamics, the photo-induced transients of CsPbBr3, CsPbBr2I, CsPbBr1.5I1.5 and CsPbI3 NCs are spectrally and temporally characterized employing a combination of femtosecond transient absorption (TA) and photoluminescence (PL) up-conversion techniques and global analysis of the data...
January 17, 2017: Nanoscale
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