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R Periáñez, Kyung-Suk Suh, Byung-Il Min
A Lagrangian model which simulates the dispersion of (137)Cs in the North Atlantic has been developed. The model includes water/sediment interactions. It has been tested comparing calculated and measured (137)Cs concentrations in water and sediments of the European Shelf resulting after the releases from the nuclear fuel reprocessing plants of Sellafield and La Hague. Some additional numerical experiments have been carried out. First, the redissolution of (137)Cs from contaminated sediments after the reduction in releases from the reprocessing plants has been studied...
October 17, 2016: Marine Pollution Bulletin
M'hamed Seklaoui, Abdelhak Boutaleb, Hanafi Benali, Fadila Alligui, Walter Prochaska
To date, there have been few detailed studies regarding the impact of mining and metallogenic activities on solid fractions in the Azzaba mercurial district (northeast Algeria) despite its importance and global similarity with large Hg mines. To assess the degree, distribution, and sources of pollution, a physical inventory of apparent pollution was developed, and several samples of mining waste, process waste, sediment, and soil were collected on regional and local scales to determine the concentration of Hg and other metals according to their existing mineralogical association...
November 2016: Environmental Monitoring and Assessment
Kei Hosoda, Keishi Yamashita, Shinichi Sakuramoto, Natsuya Katada, Hiromitsu Moriya, Hiroaki Mieno, Masahiko Watanabe
BACKGROUND: Little is known about postgastrectomy syndrome and quality of life (QOL after laparoscopy-assisted pylorus-preserving gastrectomy (LAPPG). The aim of this study was to assess postgastrectomy syndrome and QOL after LAPPG as compared with laparoscopy-assisted distal gastrectomy with Billroth-I reconstruction (LADGBI). METHODS: Postgastrectomy Syndrome Assessment Scale-45 (PGSAS-45) questionnaires were sent by mail to 167 patients. To balance the characteristics of the groups, propensity score matching was performed...
October 8, 2016: American Journal of Surgery
A P van Beek, M Emous, M Laville, J Tack
BACKGROUND: Dumping syndrome, a common complication of esophageal, gastric or bariatric surgery, includes early and late dumping symptoms. Early dumping occurs within 1 h after eating, when rapid emptying of food into the small intestine triggers rapid fluid shifts into the intestinal lumen and release of gastrointestinal hormones, resulting in gastrointestinal and vasomotor symptoms. Late dumping occurs 1-3 h after carbohydrate ingestion, caused by an incretin-driven hyperinsulinemic response resulting in hypoglycemia...
October 17, 2016: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
Matthew T Bizjack, Susan M Kidwell, Ronald G Velarde, Jill Leonard-Pingel, Adam Tomašových
Molluscan shell debris is an under-exploited means of detecting, sourcing, and age-dating dredged sediments in open-shelf settings. Backscatter features on the Southern California shelf are suggestive of dredged sediment hauled from San Diego Bay but deposited significantly inshore of the EPA-designated ocean disposal site. We find that 36% of all identifiable bivalve shells >2mm (44% of shells >4mm) in sediment samples from this 'short dump' area are from species known to live exclusively in the Bay; such shells are absent at reference sites of comparable water depth, indicating that their presence in the short-dump area signals non-compliant disposal rather than natural offshore transport or sea level rise...
October 10, 2016: Marine Pollution Bulletin
Cristiano S Mota, Ana Maria D Gonçalves, Daniele de Sanctis
DR2231 from Deinococcus radiodurans was previously functionally and structurally characterized as an all-α NTP pyrophosphohydrolase with specific dUTPase activity. dUTPases have a central role in the regulation of dUTP intracellular levels and dTTP nucleotide metabolism. DR2231 presents a conserved di-metal catalytic site, similar to the all-α dimeric dUTPases, but contrary to these enzymes, it is unable to process dUDP. In this article we present functional and structural evidence of single-point mutations that affect directly or indirectly the enzyme catalysis and provide a complete description of the all-α NTP pyrophosphohydrolase mechanism...
October 14, 2016: FEBS Journal
Anshu Gupta, R Paulraj
Landfills are considered the most widely practiced method for disposal of municipal solid waste (MSW) and 95% of the total MSW collected worldwide is disposed off in landfills. Leachate produced from Municipal solid waste landfills may contain a number of pollutants and leachates are known to pose a potential environmental risk for surface as well as ground water. In the present study chemical analysis and toxicity assessment of landfill leachate have been carried out. Leachate samples were collected from Ghazipur landfill site, New Delhi...
October 13, 2016: Environmental Technology
Lourdes Migura-Garcia, Raül Ramos, Marta Cerdà-Cuéllar
Wildlife is a natural reservoir of Salmonella and Campylobacter, the most important human foodborne pathogens worldwide. Free-living birds have the potential to transport, over large distances, such zoonotic bacteria that may harbor antimicrobial resistance traits. On the northeastern Iberian coast, we assessed the role of Yellow-legged Gulls ( Larus michahellis ) as reservoirs of antimicrobial resistance in Salmonella and thermophilic Campylobacter isolates recovered from gulls at three colonies, with varying degrees of dependence on refuse dumps as food sources...
October 10, 2016: Journal of Wildlife Diseases
Antonio Luiz de Vasconcellos Macedo, Jairo Tabacow Hidal, Wagner Marcondes, Fernando Concilio Mauro
Postprandial symptoms of neuroglycopenia after bariatric surgery may result as a consequence of endogenous hyperinsulinemic hypoglycemia (nesidioblastosis) not dumping syndrome. Pancreatectomy is an acceptable treatment for this condition. We present the video of a case of near-total distal robotic pancreactectomy for the treatment of nesidioblastosis after Roux-en-Y gastric bypass. Robotic pancreatectomy is an alternative to the treatment of nesidioblastosis after Roux-en-Y gastric bypass.
October 7, 2016: Obesity Surgery
Jinze Li, Suman Koner, Michael German, Arup K Sengupta
From a sustainability viewpoint, sodium exchange softening, although used widely, is under scrutiny due to its production of excess Na-laden spent regenerant and subsequent discharge to the environment. Many arid regions are introducing regulations disallowing dumping of concentrated sodium salts, the residuals from popular Na-exchange softening. The sodium content of the softened water is, also, always higher than in the feed, which poses a dietary health concern when used for drinking or cooking. An efficient, easy-to-operate hardness removal process with reduced sodium in both the treated water and in the spent regenerant is an unmet global need...
October 4, 2016: Environmental Science & Technology
Dimitrios Zekkos, Xunchang Fei
Constant load and constant volume simple shear testing was conducted on relatively fresh municipal solid waste (MSW) from two landfills in the United States, one in Michigan and a second in Texas, at respective natural moisture content below field capacity. The results were assessed in terms of two failure strain criteria, at 10% and 30% shear strain, and two interpretations of effective friction angle. Overall, friction angle obtained assuming that the failure plane is horizontal and at 10% shear strain resulted in a conservative estimation of shear strength of MSW...
September 28, 2016: Waste Management
Ricardo Zorron, Manoel Passos Galvão-Neto, Josemberg Campos, Alcides José Branco, José Sampaio, Tido Junghans, Claudia Bothe, Christian Benzing, Felix Krenzien
Background: Roux-en-Y gastric bypass (RYGB) is a standard therapy in bariatric surgery. Sleeve gastrectomy and gastric banding, although with good results in the literature, are showing higher rates of treatment failure to reduce obesity-associated morbidity and body weight. Other problems after bariatric may occur, as band erosion, gastroesophageal reflux disease and might be refractory to medication. Therefore, a laparoscopic conversion to a RYGB can be an effective alternative, as long as specific indications for revision are fulfilled...
2016: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
Yasmin da Silva Chaves, Afrânio Côgo Destefani
Introduction: The dumping syndrome is frequent in bariatric surgery. It is probably the most common syndrome following partial or complete gastrectomy. Its prevalence in partial gastrectomy can reach up to 50%, thus it can be a significant complication arising from some types of bariatric surgeries. Objective: Critical analysis on dumping syndrome, its pathophysiology, diagnosis and treatment. Methods: A literature review was performed using the key words: 'dumping syndrome', 'bariatric surgery' and 'rapid dumping syndrome'...
2016: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
Luca Nizzetto, Martyn Futter, Sindre Langaas
No abstract text is available yet for this article.
October 18, 2016: Environmental Science & Technology
Frans van Workum, Jolijn van der Maas, Frits J H van den Wildenberg, Fatih Polat, Ewout A Kouwenhoven, Marc J van Det, Grard A P Nieuwenhuijzen, Misha D Luyer, Camiel Rosman
BACKGROUND: Both cervical esophagogastric anastomosis (CEA) and intrathoracic esophagogastric anastomosis (IEA) are used to restore gastrointestinal integrity following minimally invasive esophagectomy (MIE). No prospective randomized data on functional outcome, postoperative morbidity, and mortality between these techniques are currently available. METHODS: A comparison was conducted including all consecutive patients with esophageal carcinoma of the distal esophagus or gastroesophageal junction undergoing MIE with CEA or MIE with IEA from October 2009 to July 2014 in 3 high-volume esophageal cancer centers...
September 24, 2016: Annals of Thoracic Surgery
Brigitte Barrois, Brigitte Perrouin-Verbe, Xavier De-Boissezon, Djamel Ben Smail, Dominique Casanova, Anthony Gelis, Denis Colin
Surgical indication is recommended for specific locations (pelvic stage 3 and 4 pressure ulcers) and if medical treatment is impossible: - global patient assessment is recommended before surgical indication with benefits and risks analysis; - analysis is conducted on several stages; - risk factors analysis and control level; - efficiency analysis about medical and preventive coverage; - pressure ulcer origin analysis; - compliance patient assessment (care contract); - systematic pre operative procedure is recommended: - multi-disciplinary et pluriprofessionnal consultation; - psychological assessment and follow up; - radiological assessment (systematical, no systematical IRM except if osteitis, no TDM, no scintigraphy); - biological assessment (inflammatory nutritional, micro biological); - no pre-operative antibiotherapy; - specify definition of surgical type - realize pre-operative micro biological taking is recommended:(according to bone aspect): - enforce systematic post operative procedures is recommended: - plan patient installation: every patient must have a preventive mattress and book curative mattress for multiple scrap; - plan total immediate post operative dumped according to patient compliance in PRM ward (during at least 3 weeks, often 4); - organize seated station progressive recharging in PRM ward (during at least 3 weeks); - extend patient supervision and allow seated station; - plan further supervision...
September 2016: Annals of Physical and Rehabilitation Medicine
Tanapon Phenrat, Pimpawat Teeratitayangkul, Isarawut Prasertsung, Rattapoohm Parichatprecha, Peerapong Jitsangiam, Narong Chomchalow, Siriwan Wichai
This research evaluated the feasibility of using vetiver plantlets (Vetiveria zizanioides (L.) Nash) on a floating platform with aeration to degrade phenol (500 mg/L) in illegally dumped industrial wastewater (IDIWW). The IDIWW sample was from the most infamous illegal dumping site at Nong Nae subdistrict, Phanom Sarakham district, Chachoengsao province, Thailand. Laboratory results suggested that phenol degradation by vetiver involves two phases: Phase I, phytopolymerization and phyto-oxidation assisted by root-produced peroxide (H2O2) and peroxidase (POD), followed by phase II, a combination of phase I with enhanced rhizomicrobial degradation...
September 24, 2016: Environmental Science and Pollution Research International
Rupa Iyer, Juhi Aggarwal, Brian Iken
The San Jacinto River (SJR) waste pits that lie just under the 1-10 overpass in eastern Harris County east of Houston, Texas, USA, were created in the 1960s as dumping grounds for paper mill waste. The deposition of this waste led to accumulation of highly toxic polychlorinated dibenzo-p-dioxins and dibenzofurans (PCCDDs/PCDFs) over the course of several decades. After abandonment, the waste material eventually became submerged under the waters of the SJR, resulting in widespread environmental contamination that currently constitutes a significant health concern for eastern Harris County communities...
September 24, 2016: Environmental Science and Pollution Research International
Paul J Sapienza, Andrew L Lee
Thymidylate synthase (TSase) is responsible for synthesizing the sole de novo source of dTMP in all organisms. TSase is a drug target, and as such, it has been well studied in terms of both structure and reaction mechanism. Cysteine 146 in Escherichia coli TSase is universally conserved because it serves as the nucleophile in the enzyme mechanism. Here we use the C146S mutation to probe the role of the sulfur atom in early events in the catalytic cycle beyond serving as the nucleophile. Surprisingly, the single-atom substitution severely decreases substrate binding affinity, and the unfavorable ΔΔG°bind is comprised of roughly equal enthalpic and entropic components at 25 °C...
October 11, 2016: Biochemistry
V F Doherty, A A Otitoloju
The widespread distribution of petroleum products arising from the rapid growth of the petroleum industry in Nigeria has resulted in the pollution of the environment through oil spills involving leakages from tankers, pipelines, tank farms, and dumping of waste petroleum products. The impacts and distribution of major toxic components (benzene, toluene, ethylbenzene, and xylene (BTEX)) of petroleum products in water and sediment samples collected from sampling stations in the Lagos lagoon was investigated over a 2-year period (February 2009-July 2010)...
October 2016: Environmental Monitoring and Assessment
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