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https://www.readbyqxmd.com/read/28738511/litter-thickness-but-not-root-biomass-explains-the-average-and-spatial-structure-of-soil-hydraulic-conductivity-in-secondary-forests-and-coffee-agroecosystems-in-veracruz-mexico
#1
B E Marín-Castro, S Negrete-Yankelevich, D Geissert
Secondary forests and coffee agroecosystems are considered good alternatives for conservation of a high capacity for water filtration in the soil where tropical montane cloud forests (TMCF) once grew; however, it is not clear which characteristics of the vegetation modulate the field saturated hydraulic conductivity of the soil (Kfs) and whether these characteristics persist in such derived systems. Here, we explore how changes in vegetation between secondary forests and coffee agroecosystems have consequences for the average value and spatial variation of litter thickness and root biomass, and whether these differences can explain the Kfs and its spatial distribution...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738329/distinct-involvement-of-the-sonic-hedgehog-signaling-pathway-in-gastric-adenocarcinoma-of-fundic-gland-type-and-conventional-gastric-adenocarcinoma
#2
Yuzuru Tajima, Takashi Murakami, Tsuyoshi Saito, Takafumi Hiromoto, Yoichi Akazawa, Noriko Sasahara, Hiroyuki Mitomi, Takashi Yao, Sumio Watanabe
BACKGROUND/AIMS: Gastric adenocarcinoma of fundic gland type (GAFG), which is a rare variant of gastric cancer, is reportedly associated with both Wnt/β-catenin signaling activation and guanine nucleotide binding protein, alpha stimulating complex (GNAS) mutations. This study aimed to elucidate potential roles of the Sonic hedgehog (Shh) signaling pathway in GAFG. METHODS: We performed immunostaining for β-catenin and Shh signal-associated proteins, including Patched (Ptch), Smoothened (Smo), and Glioma-associated oncogene-1 (Gli1), and the direct sequencing of GNAS/BRAF/KRAS in 27 GAFGs, and compared them with 30 conventional gastric adenocarcinomas (CGAs)...
July 22, 2017: Digestion
https://www.readbyqxmd.com/read/28738239/delayed-graft-duodenal-perforation-due-to-impacted-food-five-years-after-simultaneous-pancreas-kidney-transplantation-a-case-report
#3
Taizo Sakata, Hideki Katagiri, Tadao Kubota, Takashi Sakamoto, Kentaro Yoshikawa, Alan Kawarai Lefor, Cheol Woong Jung, Toru Kojima
INTRODUCTION: Pancreas transplantation is the best treatment option in selected patients with type 1 diabetes mellitus. Here we report a patient with a nonmarginal duodenal perforation five years after a simultaneous pancreas-living donor kidney transplantation (SPLKT). PRESENTATION OF CASE: A 31-year old male who underwent SPLKT five years previously presented with severe abdominal pain. He had a marginal duodenal perforation four years later, treated by primary closure and drainage...
July 14, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28737748/inflammation-free-gas-permeable-lightweight-stretchable-on-skin-electronics-with-nanomeshes
#4
Akihito Miyamoto, Sungwon Lee, Nawalage Florence Cooray, Sunghoon Lee, Mami Mori, Naoji Matsuhisa, Hanbit Jin, Leona Yoda, Tomoyuki Yokota, Akira Itoh, Masaki Sekino, Hiroshi Kawasaki, Tamotsu Ebihara, Masayuki Amagai, Takao Someya
Thin-film electronic devices can be integrated with skin for health monitoring and/or for interfacing with machines. Minimal invasiveness is highly desirable when applying wearable electronics directly onto human skin. However, manufacturing such on-skin electronics on planar substrates results in limited gas permeability. Therefore, it is necessary to systematically investigate their long-term physiological and psychological effects. As a demonstration of substrate-free electronics, here we show the successful fabrication of inflammation-free, highly gas-permeable, ultrathin, lightweight and stretchable sensors that can be directly laminated onto human skin for long periods of time, realized with a conductive nanomesh structure...
July 17, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28737675/3d-reconstruction-of-space-objects-from-multi-views-by-a-visible-sensor
#5
Haopeng Zhang, Quanmao Wei, Zhiguo Jiang
In this paper, a novel 3D reconstruction framework is proposed to recover the 3D structural model of a space object from its multi-view images captured by a visible sensor. Given an image sequence, this framework first estimates the relative camera poses and recovers the depths of the surface points by the structure from motion (SFM) method, then the patch-based multi-view stereo (PMVS) algorithm is utilized to generate a dense 3D point cloud. To resolve the wrong matches arising from the symmetric structure and repeated textures of space objects, a new strategy is introduced, in which images are added to SFM in imaging order...
July 22, 2017: Sensors
https://www.readbyqxmd.com/read/28737556/application-of-epineural-sheath-as-a-novel-approach-for-fat-volume-maintenance
#6
Maria Siemionow, Safak Uygur, Maria Madajka
INTRODUCTION: Various methods have been suggested to improve fat graft survival and decrease graft loss. The exact mechanism of fat graft survival is still unclear, and new strategies are needed to further investigate it. MATERIALS AND METHODS: The efficacy of epineural sheath in fat volume maintenance was tested in rat model. Five experimental groups were created: group 1, fat graft without any coverage; group 2, epineural sheath tube alone; group 3, epineural sheath tube filled with fat graft; group 4, fat graft mixed with minced epineural sheath without any coverage; and group 5, fat graft covered with the epineural sheath patch...
July 22, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28737194/-face-protective-patches-do-not-reduce-facial-pressure-ulcers-in-a-simulated-model-of-non-invasive-ventilation
#7
Hugo Riquelme M, David Wood V, Santiago Martínez F, Fernando Carmona M, Axel Peña V, Adriana Wegner A
Noninvasive ventilation (NIV) frequently involves the development of facial pressure ulcers (FPU). Its prevention considers the empirical use of protective patches between skin and mask, in order to reduce the pressure exerted by it. OBJECTIVES: To evaluate the effect of protective patches on the pressure exerted by the facial mask, and its impact on the programmed ventilatory parameters. METHOD: Bilevel NIV simulated model using full face mask in phantom with a physiological airway (ALS PRO +) in supine position...
June 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28736757/malaria-parasite-proteins-involved-in-nutrient-channels-at-the-host-erythrocyte-membrane-advances-and-questions-for-future-research
#8
S Chalapareddy, S A Desai
Erythrocytes infected malaria parasites have increased permeability to nutrients and other solutes, as mediated by an unusual ion channel known as the plasmodial surface anion channel (PSAC). Although the increased permeability of infected erythrocytes was identified more than 70 years ago and subsequently characterized with tracer studies, its mechanism and role in parasite biology remained unclear until the introduction of patch-clamp methods and high-throughput screening technologies. These methods discovered and implicated PSAC as the primary mechanism, determined that this channel is essential for parasite development, led to identification of the channel's genes, and stimulated antimalarial drug discovery against this target...
March 2017: Int J Curr Multidiscip Stud
https://www.readbyqxmd.com/read/28736450/screening-survey-of-ocular-nasal-respiratory-and-skin-symptoms-in-manicurists-in-poland
#9
Marta Kieć-Świerczyńska, Dominika Świerczyńska-Machura, Dorota Chomiczewska-Skóra, Beata Kręcisz, Jolanta Walusiak-Skorupa
OBJECTIVES: Manicurists are exposed to various chemicals in nail and skin care products and may develop ocular, nasal, respiratory or skin adverse reactions to them. To investigate the occurrence of ocular, nasal, respiratory and skin problems among manicurists and to identify their causal factors, particularly allergic etiology and occupational origin. MATERIAL AND METHODS: Manicurists employed in beauty salons in the central region of Poland were invited to fill in the questionnaire and undergo medical examination, skin prick tests with common aeroallergens, patch tests with European Baseline Series and (Meth)Acrylates Series-Nails and spirometry...
July 12, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28736354/novel-technique-of-percutaneous-fat-graft-for-repair-of-persistent-large-pseudomeningocele
#10
Gabrielle Santangelo, Tyler Schmidt, Mithra Gonzalez, Per-Lennart Westesson, Howard Silberstein
BACKGROUND: Pseudomeningocele is an uncommon but problematic complication in lumbar spine surgery. Initial conservative measures are frequently successful but persistence requires additional management. The current surgical approach can involve a range of techniques, including blood patches, hydrogel/fibrin sealants, drains, open surgical repair of the dura or a combination of the above if symptoms persist. This report demonstrates a novel technique for repair using a percutaneous approach to deliver an autologous fat graft into the pseudomeningocele...
July 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28736136/prostaglandin-e2-modulates-presynaptic-regulation-of-gnrh-neurons-via-ep4-receptors-in-accordance-with-estrogen-milieu
#11
Hitomi Fujioka, Toshiya Funabashi, Tatsuo Akema
Prostaglandin E2 (PGE2) promotes gonadotropin secretion by regulating the activity of neurons that release gonadotropin-releasing hormone (GnRH) in the hypothalamus. However, the mechanisms of action of PGE2 at these neurons have yet to be fully explored. We examined the effects of PGE2 on the generation of miniature excitatory postsynaptic currents (mEPSCs) at GnRH neurons as measured by whole-cell, patch-clamp recordings. GnRH neurons were identified in slices prepared from the preoptic areas of female GnRH-EGFP rats...
July 20, 2017: Neuroscience
https://www.readbyqxmd.com/read/28735735/random-forest-based-bone-segmentation-in-ultrasound
#12
Nora Baka, Sieger Leenstra, Theo van Walsum
Ultrasound (US) imaging is a safe alternative to radiography for guidance during minimally invasive orthopedic procedures. However, ultrasound is challenging to interpret because of the relatively low signal-to-noise ratio and its inherent speckle pattern that decreases image quality. Here we describe a method for automatic bone segmentation in 2-D ultrasound images using a patch-based random forest classifier and several ultrasound specific features, such as shadowing. We illustrate that existing shadow features are not robust to changes in US acquisition parameters, and propose a novel robust shadow feature...
July 20, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28735422/baerveldt%C3%A2-glaucoma-implant-surgery-with-the-double-scleral-flap-technique-to-prevent-hoffman-elbow-exposure
#13
Naoki Tojo, Tomoko Ueda-Consolvo, Shuichiro Yanagisawa, Atsushi Hayashi
OBJECTIVE: To compare the efficacy and safety of the Baerveldt® glaucoma implant (BGI) between a preserved donor scleral patch alone and double scleral flaps, comprising a preserved donor scleral patch and an autologous scleral pedicle flap. METHODS: This was an open-label retrospective study. We analyzed the cases of 52 consecutive patients (56 eyes) who underwent BGI surgery with the Hoffman elbow (#BG 102-350, Abbott) and were followed up for >1 year. Twenty-one eyes underwent BGI surgery with a preserved donor scleral patch alone (donor-patch group), and the other 35 eyes underwent BGI surgery with a preserved donor scleral patch and an autologous scleral pedicle flap (double-flap group)...
July 22, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28735419/modulation-of-human-kv4-3-kchip2-channel-inactivation-kinetics-by-cytoplasmic-ca-2
#14
Christiane Groen, Robert Bähring
The transient outward current (I to) in the human heart is mediated by Kv4.3 channels complexed with Kv channel interacting protein (KChIP) 2, a cytoplasmic Ca(2+)-binding EF-hand protein known to modulate Kv4.3 inactivation gating upon heterologous co-expression. We studied Kv4.3 channels co-expressed with wild-type (wt) or EF-hand-mutated (ΔEF) KChIP2 in human embryonic kidney (HEK) 293 cells. Co-expression took place in the absence or presence of BAPTA-AM, and macroscopic currents were recorded in the whole-cell patch-clamp configuration with different free Ca(2+) concentrations in the patch-pipette...
July 22, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28735214/indazole-based-ligands-for-estrogen-related-receptor-%C3%AE-as-potential-anti-diabetic-agents
#15
Raymond J Patch, Hui Huang, Sharmila Patel, Wing Cheung, Guozhang Xu, Bao-Ping Zhao, Derek A Beauchamp, Dionisios Rentzeperis, John G Geisler, Hossein B Askari, Jianying Liu, Jyotsna Kasturi, Meghan Towers, Micheal D Gaul, Mark R Player
Estrogen-related receptor α (ERRα) is an orphan nuclear receptor that has been functionally implicated in the regulation of energy homeostasis. Herein is described the development of indazole-based N-alkylthiazolidenediones, which function in biochemical assays as selective inverse agonists against this receptor. Series optimization provided several potent analogues that inhibited the recruitment of a co-activator peptide fragment in vitro (IC50s < 50 nM) and reduced fasted circulating insulin and triglyceride levels in a sub-chronic pre-diabetic rat model when administered orally (10 mg/kg)...
July 14, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28734961/radix-puerariae-modulates-glutamatergic-synaptic-architecture-and-potentiates-functional-synaptic-plasticity-in-primary-hippocampal-neurons
#16
Mohammad Maqueshudul Haque Bhuiyan, Md Nazmul Haque, Md Mohibbullah, Yung Kyu Kim, Il Soo Moon
ETHNOPHARMACOLOGICAL RELEVANCE: Neurologic disorders are frequently characterized by synaptic pathology, including abnormal density and morphology of dendritic spines, synapse loss, and aberrant synaptic signaling and plasticity. Therefore, to promote and/or protect synapses by the use of natural molecules capable of modulating neurodevelopmental events, such as, spinogenesis and synaptic plasticity, could offer a preventive and curative strategy for nervous disorders associated with synaptic pathology...
July 19, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28734092/disentangling-the-role-of-seed-bank-and-dispersal-in-plant-metapopulation-dynamics-using-patch-occupancy-surveys
#17
F Manna, R Pradel, R Choquet, H Fréville, P-O Cheptou
In plants, the presence of a seed bank challenges the application of classical metapopulation models to above-ground presence surveys; ignoring seed bank leads to overestimated extinction and colonization rates. In this article, we explore the possibility to detect seed bank using hidden Markov models in the analysis of above-ground patch occupancy surveys of an annual plant with limited dispersal. Patch occupancy data were generated by simulation under two metapopulation sizes (N = 200 and N = 1000 patches) and different metapopulation scenarios, each scenario being a combination of the presence/absence of a one-year seed bank and the presence/absence of limited dispersal in a circular 1-dimension configuration of patches...
July 22, 2017: Ecology
https://www.readbyqxmd.com/read/28734073/differential-calcium-sensitivity-in-nav-1-5-mixed-syndrome-mutants
#18
Mena Abdelsayed, Alban-Elouen Baruteau, Karen Gibbs, Shubhayan Sanatani, Andrew D Krahn, Vincent Probst, Peter C Ruben
INTRODUCTION: Inherited arrhythmias may arise from mutations in the SCN5a gene, which encodes the cardiac voltage-gated sodium channel, NaV 1.5. Mutants in NaV 1.5 result in Brugada Syndrome (BrS1), Long-QT Syndrome (LQT3), or mixed syndromes (an overlap of BrS1/LQT3). Exercise is a potential arrhythmogenic trigger in mixed syndromes. We sought to determine the effects of elevated cytosolic calcium, common during exercise, in mixed syndrome NaV 1.5 mutants. METHODS: We used whole-cell patch-clamp to assess the biophysical properties of NaV 1...
July 22, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28733999/retinyl-propionate-and-climbazole-combination-demonstrates-clinical-improvement-to-the-appearance-of-hyperpigmentation-and-deep-wrinkling-with-minimal-irritation
#19
Stacy Hawkins, Jean Adamus, Chung-Yi Chiang, Edwin Covell, Jaime O'Leary, Jian-Ming Lee
OBJECTIVE: To evaluate a combination of retinyl propionate and climbazole (RPC) compared to 0.1% retinol for its efficacy, tolerance and aging appearance. METHOD: Forty-five healthy Caucasian females, ages 40-70, with moderately photodamaged facial skin, were recruited for a 16 week randomized, double-blind, IRB approved facial study. The efficacy of RPC treatment was compared to 0.1% retinol, in the same product base formulation, with twice daily, split-face product application...
July 22, 2017: International Journal of Cosmetic Science
https://www.readbyqxmd.com/read/28733666/improved-liver-r2-mapping-by-averaging-decay-curves
#20
Xinyuan Zhang, Jie Peng, Changqing Wang, Yanqiu Feng, Qianjin Feng, Xinzhong Li, Wufan Chen, Taigang He
Liver R2* mapping is often degraded by the low signal-to-noise ratio (SNR) especially in the presence of severe iron. This study aims to improve liver R2* mapping at low SNRs by averaging decay curves before the process of curve-fitting. Independently filtering echo images by nonlocal means (NLM) demonstrated improved quality of R2* mapping, but may introduce new errors due to the nonlinear nature of the NLM filter, during which the averaging weights may vary with different image contents at multiple echo times...
July 21, 2017: Scientific Reports
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