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https://www.readbyqxmd.com/read/28918592/internal-phosphorus-load-in-a-mexican-reservoir-through-sediment-speciation-analysis
#1
Henri Márquez-Pacheco, Anne Margrethe Hansen
Since the sequential extraction of phosphorus (P) in sediment makes it possible to determine the P potentially available for release, in this paper, we evaluate the fractions of P in sediment profiles from Valle de Bravo reservoir, a eutrophic lake in central Mexico to determine the contributions of each fraction to the internal P load (IPL). The P fractionation scheme employs sequential extractions of sediment with O2-free water (MilliQ), bicarbonate-dithionite (BD), sodium hydroxide (NaOH), hydrochloric acid (HCl), and potassium persulfate (K2S2O8-) to obtain five P fractions...
September 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28917199/enhanced-phosphorus-and-ciprofloxacin-removal-in-a-modified-baf-system-by-configuring-fe-c-micro-electrolysis-investigation-on-pollutants-removal-and-degradation-mechanisms
#2
Longlong Zhang, Qinyan Yue, Kunlun Yang, Pin Zhao, Baoyu Gao
A modified biological aerated filter (BAF) system configured Fe-C micro electrolysis was applied to enhance phosphorus and ciprofloxacin (CIP) removal. A novel sludge ceramic and sintering ferric-carbon ceramic (SFC) were separately packed into a lab-scale BAF and Fe-C micro electrolysis reactor. The BAF and Fe-C micro electrolysis coupled system was operated about 230days. The enhancement of phosphorus and ciprofloxacin removals by Fe-C micro electrolysis, the degradation mechanisms of CIP and the variations of microbial population were investigated...
September 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28915460/persistent-and-widespread-long-term-phosphorus-declines-in-boreal-lakes-in-sweden
#3
Brian J Huser, Martyn N Futter, Rong Wang, Jens Fölster
We present an analysis of long-term (1988-2103; 26years) total phosphorus (TP) concentration trends in 81 Swedish boreal lakes subject to minimal anthropogenic disturbance. Near universal increases in dissolved organic carbon (DOC) concentrations and a widespread but hitherto unexplained decline in TP were observed. Over 50% of the lakes (n=42) had significant declining TP trends over the past quarter century (Sen's slope=2.5%y(-1)). These declines were linked to catchment processes related to changes in climate, recovery from acidification, and catchment soil properties, but were unrelated to trends in P deposition...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28913753/herbivorous-snails-can-increase-water-clarity-by-stimulating-growth-of-benthic-algae
#4
Xiufeng Zhang, William D Taylor, Lars G Rudstam
Eutrophication in shallow lakes is characterized by a switch from benthic to pelagic dominance of primary productivity that leads to turbid water, while benthification is characterized by a shift in primary production from the pelagic zone to the benthos associated with clear water. A 12-week mesocosm experiment tested the hypothesis that the herbivorous snail Bellamya aeruginosa stimulates the growth of pelagic algae through grazing on benthic algae and through accelerating nutrient release from sediment. A tube-microcosm experiment using (32)P-PO4 as a tracer tested the effects of the snails on the release of sediment phosphorus (P)...
September 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28913369/changes-in-the-width-of-the-tibiofibular-syndesmosis-related-to-lower-extremity-joint-dynamics-and-neuromuscular-coordination-on-drop-landing-during-the-menstrual-cycle
#5
Michie Okazaki, Masaaki Kaneko, Yukisato Ishida, Norio Murase, Toshihito Katsumura
BACKGROUND: Many injuries of the lower extremities, especially the knee and ankle, occur during sports activity, and the incidence rate is higher in women than in men. HYPOTHESIS: The hypothesis was that phases of the menstrual cycle affect the width of the tibiofibular syndesmosis during drop landing in healthy young women and that such changes at the tibiofibular joint also affect the dynamics and neuromuscular coordination of the lower extremities. STUDY DESIGN: Descriptive laboratory study...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28912812/the-influence-of-sweet-taste-perception-on-dietary-intake-in-relation-to-dental-caries-and-bmi-in-saudi-arabian-schoolchildren
#6
Heba Ashi, Guglielmo Campus, Heléne Bertéus Forslund, Waleed Hafiz, Neveen Ahmed, Peter Lingström
OBJECTIVES: The aim of the study was to evaluate the influence of sweet taste perception on dietary habits in Saudi schoolchildren. In addition, the relationship between dietary habits and both caries and BMI was studied. METHODS: A cross-sectional observational study comprising 225 schoolchildren aged 13-15 years from Jeddah, Saudi Arabia, was conducted. The consumption frequency of certain food items was analysed from a beverage and snack questionnaire and a three-day estimated dietary record was obtained...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28912563/a-cell-cycle-independent-mode-of-the-rad9-dpb11-interaction-is-induced-by-dna-damage
#7
Giulia di Cicco, Susanne C S Bantele, Karl-Uwe Reusswig, Boris Pfander
Budding yeast Rad9, like its orthologs, controls two aspects of the cellular response to DNA double strand breaks (DSBs) - signalling of the DNA damage checkpoint and DNA end resection. Rad9 binds to damaged chromatin via modified nucleosomes independently of the cell cycle phase. Additionally, Rad9 engages in a cell cycle-regulated interaction with Dpb11 and the 9-1-1 clamp, generating a second pathway that recruits Rad9 to DNA damage sites. Binding to Dpb11 depends on specific S/TP phosphorylation sites of Rad9, which are modified by cyclin-dependent kinase (CDK)...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912075/ventricular-repolarization-disturbances-after-high-dose-intravenous-methylprednisolone-theraphy
#8
Gokhan Altunbas, Murat Sucu, Orhan Zengin
OBJECTIVE: There are no randomized trials evaluating the effects of pulse steroid treatment on cardiac electrophysiologic functions. The data are limited only to case series. In this study, we sought to evaluate the effects of high dose intravenous methylprednisolone therapy on indices of ventricular repolarization. METHODS: Fifty patients with various autoimmune and inflammatory disorders were enrolled to the study. Electrocardiography (ECG) was obtained 4h before and 12h after the pulse steroid treatment...
August 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28912011/cell-line-dependent-antiviral-activity-of-sofosbuvir-against-zika-virus
#9
Noreen Mumtaz, Leah C Jimmerson, Lane R Bushman, Jennifer J Kiser, Georgina Aron, Chantal B E M Reusken, Marion P G Koopmans, Jeroen J A van Kampen
The recent epidemic of Zika virus (ZIKV) in the Americas and its association with fetal and neurological complications has shown the need to develop a treatment. Repurposing of drugs that are already FDA approved or in clinical development may shorten drug development timelines in case of emerging viral diseases like ZIKV. Initial studies have shown conflicting results when testing sofosbuvir developed for treatment of infections with another Flaviviridae virus, hepatitis C virus. We hypothesized that the conflicting results could be explained by differences in intracellular processing of the compound...
September 11, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28911142/deficient-endogenous-glucose-production-during-exercise-after-total-pancreatectomy-islet-autotransplantation
#10
Lindsey D Bogachus, Elizabeth Oseid, Melena Bellin, Adrian Vella, R Paul Robertson
Context: Total pancreatectomy followed by intrahepatic islet autotransplantation (TP/IAT) is performed to alleviate severe, unrelenting abdominal pain caused by chronic pancreatitis, to improve quality of life, and to prevent diabetes. Objective: To determine the cause of exercise-induced hypoglycemia that is a common complaint in TP/IAT recipients. Design: Participants completed 1 hour of steady-state exercise. Setting: Hospital research unit...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28910954/-the-value-of-serum-human-tumor-protein-p53-in-colorectal-cancer-combined-diagnosis-and-postoperative-monitoring
#11
P Fan, Y Zhang, F Deng, S H Chen, M Li, Q Zhang
Objective: The aim of this paper is to investigate the application value of serum human tumor protein P53 (TP53) in the diagnosis and postoperative monitoring of colorectal cancer. Methods: One hundred and fifteen patients with colorectal cancer diagnosed without colorectal cancer and without surgery, radiotherapy and chemotherapy and total of 158 patients with colorectal benign disease and 182 healthy subjects were enrolled in this study. The levels of serum carcinoembryonic antigen (CEA) and carbohydrate antigen 199 (CA199) were detected by electrochemiluminescence assay...
September 12, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28910438/long-term-outcomes-of-subtotal-septal-reconstruction-in-rhinoplasty
#12
Scott A Asher, Akta S Kakodkar, Dean M Toriumi
Importance: Significant nasal septal deviation may require complex reconstruction to achieve complete correction. Subtotal septal reconstruction is a method for addressing deviations in the L-strut. Objectives: To review the long-term outcomes of subtotal septal reconstruction and provide objective evidence of functional and aesthetic improvement. Design, Setting, and Participants: This medical record review obtained data on 144 patients who underwent subtotal septal reconstruction from September 1, 2008, to September 1, 2013...
September 14, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/28906067/ruminal-phytate-degradation-of-maize-grain-and-rapeseed-meal-in%C3%A2-vitro-and-as-affected-by-phytate-content-in-donor-animal-diets-and-inorganic-phosphorus-in-the-buffer
#13
E Haese, M Lengowski, E Gräter, A Föll, J Möhring, H Steingass, M Schollenberger, M Rodehutscord
The ruminal disappearance of phytate phosphorus (InsP6 -P) from maize grain and rapeseed meal (RSM) was determined in two in vitro studies. In experiment 1, two diets differing in phosphorus (P) and InsP6 -P concentration were fed to the donor animals of rumen fluid (diet HP: 0.49% P in dry matter, diet LP: 0.29% P). Maize grain and RSM were incubated in a rumen fluid/saliva mixture for 3, 6, 12 and 24 h. In experiment 2, a diet similar to diet HP was fed, and the rumen fluid was mixed with artificial saliva containing 120 mg inorganic P/l (Pi) or no inorganic P (P0)...
October 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28905938/triptolide-induces-sertoli-cell-apoptosis-in-mice-via-ros-jnk-dependent-activation-of-the-mitochondrial-pathway-and-inhibition-of-nrf2-mediated-antioxidant-response
#14
Yu Wang, Su-Han Guo, Xue-Jun Shang, Li-Sha Yu, Jian-Wei Zhu, Ang Zhao, Yan-Fen Zhou, Guo-Hua An, Qi Zhang, Bo Ma
Triptolide (TP), an oxygenated diterpene, has a variety of beneficial pharmacodynamic activities but its clinical applications are restricted due to severe testicular injury. This study aimed to delineate the molecular mechanisms of TP-induced testicular injury in vitro and in vivo. TP (5-50000 nmol/L) dose-dependently decreased the viability of TM4 Sertoli cells with an IC50 value of 669.5-269.45 nmol/L at 24 h. TP (125, 250, and 500 nmol/L) dose-dependently increased the accumulation of ROS, the phosphorylation of JNK, mitochondrial dysfunction and activation of the intrinsic apoptosis pathway in TM4 cells...
September 14, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28903093/chlorination-chloramination-and-ozonation-of-carbamazepine-enhance-cytotoxicity-and-genotoxicity-multi-endpoint-evaluation-and-identification-of-its-genotoxic-transformation-products
#15
Yingnan Han, Mei Ma, Na Li, Rui Hou, Chao Huang, Yoshimitsu Oda, Zijian Wang
Investigations have focused on the removal and transformation of pharmaceuticals during drinking water and wastewater treatment. In the present study, we investigated for the first time the changes of the cytotoxicity and genotoxicity based on different modes of action (MoAs) during chlorination, chloramination and ozonation processes of the anti-epileptic drug carbamazepine (CBZ). The results illustrated that ozonation enhanced the cytotoxicity and the chromosome damage effects on CHO-K1 cells detected by cytokinesis-block micronucleus (CBMN) assay based on high-content screening technique, though ozonation showed the highest removal efficiency for CBZ...
September 1, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28902790/impact-of-treatments-on-diabetic-control-and-gastrointestinal-symptoms-after-total-pancreatectomy
#16
Maarten R Struyvenberg, Zhi Ven Fong, Camilia R Martin, Jennifer F Tseng, Thomas E Clancy, Carlos Fernández-Del Castillo, Hanna J Tillman, Melena D Bellin, Steven D Freedman
OBJECTIVES: The aims of this study were to compare the safety, efficacy, and patients' quality of life with continuous subcutaneous insulin infusion (CSII) versus multiple daily injections (MDIs) in type 3c diabetes mellitus (T3cDM) following total pancreatectomy (TP) and pancreatic enzyme usage. METHODS: Thirty-nine patients with T3cDM (18 CSII patients vs 21 MDI patients) who underwent TP between 2000 and 2016 at 3 Harvard-affiliated hospitals and the University of Minnesota returned prospectively obtained questionnaires examining quality of life and both endocrine and exocrine pancreatic functions...
October 2017: Pancreas
https://www.readbyqxmd.com/read/28901586/long-term-effects-of-cardiac-resynchronization-therapy-on-electrical-remodeling-in-heart-failure-a-prospective-study
#17
Bharatraj Banavalikar, Anees Thajudeen, Narayanan Namboodiri, Krishna Kumar Mohanan Nair, Abhilash Srivilasam Pushpangadhan, Ajit Kumar Valaparambil
INTRODUCTION: Effects of cardiac resynchronization therapy (CRT) on arrhythmogenicity and sudden death have not been fully ascertained. CRT has been shown to increase transmural dispersion of repolarization (TDR) immediately on implantation, that may favorably remodel on long-term follow-up. However, such a hypothesis has not been prospectively evaluated. METHODS AND RESULTS: We included 35 consecutive patients who underwent CRT implantation between September 2013 & August 2014 (mean age 56...
September 13, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28901563/analysis-of-serum-levels-and-cutaneous-expression-of-lipoprotein-a-in-38-patients-with-livedoid-vasculopathy
#18
Espinel Ds, Di Giacomo Tb, Pincelli Tp, Pereira Nv, Sotto Mn, Kirsner Rs, Criado Pr
BACKGROUND: Coagulation disorders contribute to the development of livedoid vasculopathy (LV). Elevated plasma levels of lipoprotein(a) [Lp(a)] are an independent risk factor for the development of cardiovascular disease and associated with hypercoagulable states. Increased serum Lp(a) levels have been reported in patients with LV and may have an important role in the pathogenesis of LV. OBJECTIVES: To investigate Lp(a) expression in skin lesions and circulating serum Lp(a) levels in patients with LV...
September 13, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28900496/decreased-overall-and-cancer-specific-mortality-with-neoadjuvant-chemotherapy-in-locoregionally-advanced-nasopharyngeal-carcinoma-treated-by-intensity-modulated-radiotherapy-multivariate-competing-risk-analysis
#19
Jian Zhang, Hao Peng, Lei Chen, Wen-Fei Li, Yan-Ping Mao, Li-Zhi Liu, Li Tian, Ying Guo, Ying Sun, Jun Ma
Background: Value of neoadjuvant chemotherapy (NACT) is still controversial in locoregionally advanced nasopharyngeal carcinoma (LA-NPC). Based on competing risk analysis model, we aim at evaluating the efficacy of NACT in decreasing cancer-specific mortality for LA-NPC (except T3-4N0) treated by intensity-modulated radiotherapy (IMRT). Methods: Data on 957 patients with LA-NPC were retrospectively reviewed. The cumulative incidence of cancer-specific and non-cancer-specific (competing) mortality was determined by univariate and multivariate competing risk analysis...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28900369/the-local-clinical-validation-of-a-new-lithium-heparin-tube-with-a-barrier-bd-vacutainer%C3%A2-barricor-lh-plasma-tube
#20
Fatma Demet Arslan, Inanc Karakoyun, Banu Isbilen Basok, Merve Zeytinli Aksit, Anil Baysoy, Yasemin Kilic Ozturk, Yusuf Adnan Guclu, Can Duman
INTRODUCTION: Although serum-providing blood tubes with a barrier are still widely used due to their significant advantages, the use of blood tubes with a barrier to provide plasma is becoming widespread. We compared 22 analytes in a BD Vacutainer® Barricor LH Plasma tube for local clinical validation of this new lithium heparin tube with a barrier. MATERIALS AND METHODS: Samples from 44 volunteers were collected in different tubes (Becton Dickinson and Company): Z tube without additive (reference), clot-activator tube with gel (SST), lithium heparin tube without gel (LiH), and lithium heparin tube with barrier (Barricor)...
October 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
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