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https://www.readbyqxmd.com/read/29775841/cesium-desorption-behavior-of-weathered-biotite-in-fukushima-considering-the-actual-radioactive-contamination-level-of-soils
#1
Hiroki Mukai, Kenji Tamura, Ryosuke Kikuchi, Yoshio Takahashi, Tsuyoshi Yaita, Toshihiro Kogure
For the better understanding of radioactive contamination in Fukushima Prefecture at present and in future, Cs desorption experiments have been conducted mainly using weathered biotite (WB) collected from Fukushima Prefecture and considering the actual contamination level (∼10-10  wt%) of radiocesium in Fukushima Prefecture. In the experiments, 137 Cs sorbed to WB by immersing in 137 Cs solution for one day was mostly desorbed by solutions of 1 M NaNO3 , 1 M LiNO3 , 10-1  M HCl, and 10-1  M HNO3 , although it was barely desorbed by 1 M KNO3 , 1 M CsNO3 , 1 M NH4 NO3 , and natural seawater...
May 15, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29774947/passive-engineering-mechanism-enhancement-of-a-flexor-digitorum-longus-tendon-transfer-procedure
#2
Connor M Pihl, Christina J Stender, Ravi Balasubramanian, Kylie M Edinger, Bruce J Sangeorzan, William R Ledoux
Standard treatments of adult acquired flatfoot deformity (AAFD) fail to correct associated dysfunction of the posterior tibial tendon (PTT). This study aimed to determine if a novel passive engineering mechanism (PEM) enhanced flexor digitorum longus (FDL) tendon transfer procedure would better restore physiologic PTT function to improve AAFD gait parameters compared to standard treatment. We evaluated the kinetic, pedobarographic, and kinematic effects of a pulley-based PEM-enhancement system utilizing a cadaveric flatfoot model and robotic gait simulator...
May 18, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29774199/malignant-metastasis-misdiagnosed-as-osteoporotic-compression-fracture-a-case-report
#3
Seul Gi Kim, Chang Il Ju, Hui Sun Wang, Seok Won Kim
In cases of vertebral collapse after a trivial injury in elderly patients with severe osteoporosis, it can be a diagnostic challenge to determine whether the cause is a benign compression fracture or malignant metastasis. A 78-year-old male patient was referred to the emergency department for the evaluation of weakness of the left lower limb. He had undergone percutaneous vertebroplasty four months earlier after being diagnosed with L3 osteoporotic compression fracture. He was treated with foraminotomy at the L3-4 level after being diagnosed with foraminal stenosis two months earlier at a spine clinic...
April 2018: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/29773744/worldwide-emergence-of-resistance-to-antifungal-drugs-challenges-human-health-and-food-security
#4
REVIEW
Matthew C Fisher, Nichola J Hawkins, Dominique Sanglard, Sarah J Gurr
The recent rate of emergence of pathogenic fungi that are resistant to the limited number of commonly used antifungal agents is unprecedented. The azoles, for example, are used not only for human and animal health care and crop protection but also in antifouling coatings and timber preservation. The ubiquity and multiple uses of azoles have hastened the independent evolution of resistance in many environments. One consequence is an increasing risk in human health care from naturally occurring opportunistic fungal pathogens that have acquired resistance to this broad class of chemicals...
May 18, 2018: Science
https://www.readbyqxmd.com/read/29772860/-effect-observation-of-percutaneous-pedicle-screw-fixation-combined-with-percutaneous-vertebroplasty-for-the-treatment-of-osteoporotic-thoracolumbar-fractures
#5
Nan Wang, Jian-Zhu Xu, En-Liang Chen, Shi-Jie Zhao, Ren-Fu Quan
OBJECTIVE: To evaluate the clinical effects of percutaneous pedicle screw fixation(PPSF) combined with percutaneous vertebroplasty(PVP) for the treatment of osteoporotic thoracolumbar fractures. METHODS: The clinical data of 94 patients with osteoporotic thoracolumbar fractures treated from January 2014 to December 2015 were retrospectively analyzed. There were 31 males and 63 females, aged from 65 to 70 years old with an average of 67.2 years. Fracture level was T₁₁ on 15 cases, T₁₂ on 32 cases, L₁ on 29 cases and L₂ on 18 cases...
April 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29772711/biomimetic-superhydrophobic-hollowed-out-pyramid-surface-based-on-self-assembly
#6
Weipeng Luo, Bin Yu, Dingbang Xiao, Meng Zhang, Xuezhong Wu, Guoxi Li
In this paper, we present a periodic hollowed-out pyramid microstructure with excellent superhydrophobicity. In our approach, T-topping pillars and capillary-induced self-assembly methods were combined with the photolithography process to fabricate a hollowed-out pyramid structure. First, a wideband ultraviolet source without a filter was used to fabricate the T-topping pillars during the exposure process; then, the evaporation-induced assembly collapsed the pillars and formed the hollowed-out pyramid structure...
May 16, 2018: Materials
https://www.readbyqxmd.com/read/29772532/differential-effects-of-the-pi3k-akt-pathway-on-antler-stem-cells-for-generation-and-regeneration-of-antlers-in-vitro
#7
Zhen Liu, Haiping Zhao, Datao Wang, Chris McMahon, Chunyi Li
Understanding the role of the PI3K/AKT pathway in regulating basic antler stem cell parameters and angiogenesis may provide an insight into the mechanisms underlying mammalian appendage development. The present study took multiple approaches in vitro to investigate the effects of the PI3K/AKT pathway on antler stem cells. By addition of LY294002, proliferation rate of the antlerogenic periosteum (AP) cells was decreased significantly ( p <0.01), while the proliferation rate of the pedicle periosteum (PP) cells decreased to a lesser extent; the cytoskeleton of the AP cells was essentially collapsed; and the PP cells significantly shrunken...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29772239/small-gtpase-r-ras-participates-in-neural-tube-formation-in-zebrafish-embryonic-spinal-cord
#8
Shinya Ohata, Hideko Uga, Hitoshi Okamoto, Toshiaki Katada
Ras related (R-Ras), a small GTPase, is involved in the maintenance of apico-basal polarity in neuroepithelial cells of the zebrafish hindbrain, axonal collapse in cultured murine hippocampal neurons, and maturation of blood vessels in adult mice. However, the role of R-Ras in neural tube formation remains unknown. Using antisense morpholino oligonucleotides (AMOs), we found that in the spinal cord of zebrafish embryos, the lumen was formed bilaterally in rras morphants, whereas it was formed at the midline in control embryos...
May 14, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29771831/barbed-hyoglossomandibulopexia-a-preclinical-study-on-human-anatomic-models
#9
Mario Mantovani, Vittorio Rinaldi, Sara Torretta, Roberto Trojsi, Daniela Carioli, Lorenzo Pignataro
The retrobasilingual space is the one of the most frequent sites of obstruction in patients with severe obstructive sleep apnea hypopnea syndrome, and several multilevel surgical procedures have been developed. The authors tested by means a preclinical study the feasibility of a new experimental surgical procedure called barbed hyoglossomandibulopexia (B.Hy.G.M.P.) which aims at advancing the tongue base with the hyoid bone (hyo-glossopexia) by multiple plicatures at the oral floor muscles.B.Hy.G.M.P. was performed during cadaveric dissection on 12 human models...
May 15, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29771714/remifentanil-induces-cardio-protection-against-ischemia-reperfusion-injury-by-inhibiting-endoplasmic-reticulum-stress-through-the-maintenance-of-zinc-homeostasis
#10
Mingwei Sheng, Ge Zhang, Jiannan Wang, Qing Yang, Huanhuan Zhao, Xinxin Cheng, Zhelong Xu
BACKGROUND: Although it is well known that remifentanil (Rem) elicits cardiac protection against ischemia/reperfusion (I/R) injury, the underlying mechanism remains unclear. This study tested if Rem can protect the heart from I/R injury by inhibiting endoplasmic reticulum (ER) stress through the maintenance of zinc (Zn) homeostasis. METHODS: Isolated rat hearts were subjected to 30 minutes of regional ischemia followed by 2 hours of reperfusion. Rem was given by 3 consecutive 5-minute infusions, and each infusion was followed by a 5-minute drug-free perfusion before ischemia...
May 15, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29771283/adolescents-at-high-risk-of-obesity-show-greater-striatal-response-to-increased-sugar-content-in-milkshakes
#11
Grace E Shearrer, Eric Stice, Kyle S Burger
Background: Children of overweight or obese parents are at a high risk of developing obesity. Objective: This study sought to examine the underlying neural factors related to parental obesity risk and the relative impact of sugar and fat when consuming a palatable food, as well as the impact of obesity risk status on brain response to appetizing food images. Design: With the use of functional MRI, the responses of 108 healthy-weight adolescents [mean ± SD body mass index (kg/m2): 20...
May 16, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29771111/the-chemical-history-of-a-bubble
#12
Kenneth S Suslick, Nathan C Eddingsaas, David J Flannigan, Stephen D Hopkins, Hangxun Xu
Acoustic cavitation (the growth, oscillation, and rapid collapse of bubbles in a liquid) occurs in all liquids irradiated with sufficient intensity of sound or ultrasound. The collapse of such bubbles creates local heating and provides a unique source of energy for driving chemical reactions. In addition to sonochemical bond scission and formation, cavitation also induces light emission in many liquids. This phenomenon of sonoluminescence (SL) has captured the imagination of many researchers since it was first observed 85 years ago...
May 17, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29770896/mitochondrial-morphology-and-function-impaired-by-dimethyl-sulfoxide-and-dimethyl-formamide
#13
Long Ma, Jia-Xin Dong, Wen-Rong Fu, Xue-Yi Li, Jing Chen, Yi Liu
In this work, the effects of two non-ionic, non-hydroxyl organic solvents, dimethyl sulfoxide (DMSO) and dimethyl formamide (DMF) on the morphology and function of isolated rat hepatic mitochondria were investigated and compared. Mitochondrial ultrastructures impaired by DMSO and DMF were clearly observed by transmission electron microscopy. Spectroscopic and polarographic results demonstrated that organic solvents induced mitochondrial swelling, enhanced the permeation to H+ /K+ , collapsed the potential inner mitochondrial membrane (IMM), and increased the IMM fluidity...
May 17, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29770793/pulmonary-embolism
#14
REVIEW
Menno V Huisman, Stefano Barco, Suzanne C Cannegieter, Gregoire Le Gal, Stavros V Konstantinides, Pieter H Reitsma, Marc Rodger, Anton Vonk Noordegraaf, Frederikus A Klok
Pulmonary embolism (PE) is caused by emboli, which have originated from venous thrombi, travelling to and occluding the arteries of the lung. PE is the most dangerous form of venous thromboembolism, and undiagnosed or untreated PE can be fatal. Acute PE is associated with right ventricular dysfunction, which can lead to arrhythmia, haemodynamic collapse and shock. Furthermore, individuals who survive PE can develop post-PE syndrome, which is characterized by chronic thrombotic remains in the pulmonary arteries, persistent right ventricular dysfunction, decreased quality of life and/or chronic functional limitations...
May 17, 2018: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/29770487/inhibitory-effect-of-melatonin-on-necroptosis-via-repressing-the-ripk3-pgam5-cypd-mptp-pathway-attenuates-cardiac-microvascular-ischemia-reperfusion-injury
#15
Hao Zhou, Dandan Li, Pingjun Zhu, Qiang Ma, Toan Sam, Jin Wang, Shunying Hu, Yundai Chen, Yingmei Zhang
The molecular features of necroptosis in cardiac ischemia reperfusion (IR) injury have been extensively explored. However, there have been no studies investigating the physiological regulatory mechanisms of melatonin acting on necroptosis in cardiac IR injury. This study was designed to determine the role of necroptosis in microvascular IR injury, and investigate the contribution of melatonin in repressing necroptosis and preventing IR-mediated endothelial system collapse. Our results demonstrated that Ripk3 was primarily activated by IR injury and consequently aggravated endothelial necroptosis, microvessel barrier dysfunction, capillary hyperpermeability, the inflammation response, microcirculatory vasospasms and microvascular perfusion defects...
May 16, 2018: Journal of Pineal Research
https://www.readbyqxmd.com/read/29768841/fabrication-and-characterization-of-the-graphene-composites-containing-embedded-manganese-dioxide-nanoparticles
#16
Sang-Chul Byun, Soo-Jin Park, Il Kim, Seok Kim
Graphene composites containing embedded manganese dioxide (MnO2) were fabricated by simple solvothermal method. 100 nm to 200 nm size of nanoparticles were anchored on reduced graphene oxide layers. The MnO2/RGO composite with optimized molar concentration of manganese precursors in fixed graphene oxide mass was showed the highest specific capacitance of 186 F/g at 1 A/g. In addition, cycle life performance of MnO2/RGO composite was improved by using graphene having high electrical conductivity as a substrate...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768821/preparation-of-ph-responsive-hollow-capsules-via-layer-by-layer-assembly-of-exfoliated-layered-double-hydroxide-nanosheets-and-polyelectrolytes
#17
Kiyofumi Katagiri, Yoshinori Shishijima, Kunihito Koumoto, Kei Inumaru
pH-Responsive smart capsules were developed by the layer-by-layer assembly with a colloidtemplating technique. Polystyrene (PS) particles were employed as core templates. Acid-soluble inorganic nanosheets were prepared from Mg-Al layered double hydroxide (LDH) by an exfoliation technique. LDH nanosheets and anionic polyelectrolytes were alternatively deposited on PS core particles by the layer-by-layer assembly using electrostatic interaction. Hollow capsules were obtained by the removal of the PS core particles...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768378/cerebral-infarction-as-initial-presentation-in-stress-cardiomyopathy-case-report-and-literature-review
#18
Qiongying Wang, Heng Yu, Cheng Jiang, Runmin Sun, Miaomiao Qi, Shougang Sun, Guangli Xu, Hongbin Cai, Zhenchang Zhang, Feng Zhao, Xiaoqing Kou, Jing Yu, Feng Bai
RATIONALE: The typical symptoms of stress cardiomyopathy include sudden-onset chest pain and breathlessness or collapse as well as classical symptoms of cardiovascular disease; however, rare reports have described nervous system symptoms as the initial manifestation. Here, we report the case of a young man who presented with a large cerebral infarction as the main clinical symptom of stress cardiomyopathy to increase recognition of the disease. PATIENT CONCERNS: A 28-year-old man was admitted to our hospital for sudden-onset weakness of the right limbs and unconsciousness for 1 day...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29767951/nanogel-incorporated-injectable-hydrogel-for-synergistic-therapy-based-on-sequential-local-delivery-of-combretastatin-a4-phosphate-ca4p-and-doxorubicin-dox
#19
Wen Jing Yang, Peng Zhou, Lijun Liang, Yanpeng Cao, Junqin Qiao, Xiaohui Li, Zhaogang Teng, Lianhui Wang
Drug combination therapies employing dual drug delivery systems offer an effective approach to reduce disadvantages of single drug therapy, such as high dose and easy generation of drug resistance. Herein, a dual drug delivery system based on nanogel-incorporated injectable hydrogel (NHG) was designed for sequentially local delivery of combretastatin-A4 phosphate (CA4P) and doxorubicin (DOX) for antiangiogensis and anticancer combination therapy. The injectable hydrogel was prepared for loading and quick release of hydrophilic drug CA4P, while the pH and redox stimuli-responsive nanohydrogels were incorporated into the injectable hydrogel by pH-responsive boronate ester bond for sustained long-term DOX delivery...
May 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29767208/insights-into-the-thermal-phase-transition-behavior-of-a-gemini-dicationic-polyelectrolyte-in-aqueous-solution
#20
Yingna Zhang, Hui Tang, Peiyi Wu
The thermal-induced phase transition behavior of a LCST-type poly(ionic liquid) (PIL) aqueous solution with gemini-cationic structure, poly[(1,8-octanediyl-bis(tri-n-butylphosphonium)4-styrene sulfonate)] (P[SS-P2]), was investigated in this paper. Based on the calorimetric measurements, a unique dependence of transition points on concentration was found in P[SS-P2] aqueous solution compared to its mono-cationic PIL and [SS-P2] aqueous solution. Optical microscopy showed that globular microscopic droplets were formed during the phase transition, suggesting that gemini dications and the possible dynamic ionic bonds may facilitate the liquid-liquid phase separation (LLPS) in P[SS-P2] aqueous solution...
May 16, 2018: Soft Matter
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