Temporal Trends of Perfluorinated Compounds from Various Environmental Matrices

2011 ◽  
pp. 73-85
Author(s):  
Yasuyuki Zushi ◽  
Shigeki Masunaga
Keyword(s):  
Temporal Trends ◽  
Perfluorinated Compounds ◽  
Environmental Matrices

scholarly journals Determinants of maternal and fetal exposure and temporal trends of perfluorinated compounds

2013 ◽  
Vol 20 (11) ◽  
pp. 7970-7978 ◽  
Author(s):  
Amanda Ode ◽  
Lars Rylander ◽  
Christian H. Lindh ◽  
Karin Källén ◽  
Bo A. G. Jönsson ◽  
...  
Keyword(s):  
Temporal Trends ◽  
Perfluorinated Compounds ◽  
Fetal Exposure

Spatial and Temporal Trends of Perfluorinated Compounds in Beluga Whales (Delphinapterus leucas) from Alaska

2011 ◽  
Vol 45 (19) ◽  
pp. 8129-8136 ◽  
Author(s):  
Jessica L. Reiner ◽  
Steven G. O’Connell ◽  
Amanda J. Moors ◽  
John R. Kucklick ◽  
Paul R. Becker ◽  
...  
Keyword(s):  
Temporal Trends ◽  
Perfluorinated Compounds ◽  
Delphinapterus Leucas ◽  
Beluga Whales ◽  
Spatial And Temporal Trends

scholarly journals Perfluorinated compounds in red-throated divers from the German Baltic Sea: new findings from their distribution in 10 different tissues

2011 ◽  
Vol 8 (4) ◽  
pp. 419 ◽  
Author(s):  
Janne Rubarth ◽  
Annekatrin Dreyer ◽  
Nils Guse ◽  
Jürgen W. Einax ◽  
Ralf Ebinghaus
Keyword(s):  
Baltic Sea ◽  
High Performance ◽  
Body Burden ◽  
Standard Addition ◽  
Perfluorinated Compounds ◽  
Fatty Tissue ◽  
Environmental Matrices ◽  
Multivariate Statistical ◽  
Tissue Samples ◽  
New Findings

Environmental contextPerfluorinated compounds are commonly used chemicals that are detected globally in all environmental matrices. We investigated the extent of contamination by perfluorinated compounds in the red-throated diver, a marine predatory bird, and observed an unusual distribution of perfluorinated compounds in tissues. The data help us to better understand the behaviour of these contaminants in organisms. AbstractTwenty poly- and perfluorinated compounds (PFCs) were investigated in four red-throated divers (Gavia stellata) from the German Baltic Sea sampled in 2005. Concentrations of perfluoroalkyl sulfonates (PFSAs), perfluoroalkyl carboxylates (PFCAs), alkylated perfluoroalkyl sulfonamides, alkylated perfluoroalkyl sulfonamidoethanols and perfluorooctane sulfonamides were determined in blood, brain, fatty tissue, gall bladder, heart, kidney, liver, lung, muscle and spleen by high-performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS). For quantification standard addition was applied. Twelve compounds were detected with average total PFC concentrations ranging from 42 ng g–1 in muscle to 220 ng g–1 in liver samples. Perfluorooctane sulfonate (PFOS) was the major compound in each of the 40 tissue samples. Except for brain, perfluoroundecanoate was the dominant PFCA. In brain samples preferential enrichment of long-chain PFSAs and PFCAs was observed. The total PFC body burden was estimated to 100 ± 39 µg. Multivariate statistical analyses supported the identification of the preferred accumulation ‘location’ of individual PFCs in the birds’ body.

Twitter Usage Using Common Reference to Tinnitus

2020 ◽  
Vol 29 (2) ◽  
pp. 206-217
Author(s):  
Jianyuan Ni ◽  
Monica L. Bellon-Harn ◽  
Jiang Zhang ◽  
Yueqing Li ◽  
Vinaya Manchaiah
Keyword(s):  
Nonprofit Organizations ◽  
Temporal Trends ◽  
Temporal Analysis ◽  
Cross Sectional ◽  
For Profit ◽  
Common Reference ◽  
Personal Experiences ◽  
Twitter Users ◽  
Sectional Analysis ◽  
Share Information

Objective The objective of the study was to examine specific patterns of Twitter usage using common reference to tinnitus. Method The study used cross-sectional analysis of data generated from Twitter data. Twitter content, language, reach, users, accounts, temporal trends, and social networks were examined. Results Around 70,000 tweets were identified and analyzed from May to October 2018. Of the 100 most active Twitter accounts, organizations owned 52%, individuals owned 44%, and 4% of the accounts were unknown. Commercial/for-profit and nonprofit organizations were the most common organization account owners (i.e., 26% and 16%, respectively). Seven unique tweets were identified with a reach of over 400 Twitter users. The greatest reach exceeded 2,000 users. Temporal analysis identified retweet outliers (> 200 retweets per hour) that corresponded to a widely publicized event involving the response of a Twitter user to another user's joke. Content analysis indicated that Twitter is a platform that primarily functions to advocate, share personal experiences, or share information about management of tinnitus rather than to provide social support and build relationships. Conclusions Twitter accounts owned by organizations outnumbered individual accounts, and commercial/for-profit user accounts were the most frequently active organization account type. Analyses of social media use can be helpful in discovering issues of interest to the tinnitus community as well as determining which users and organizations are dominating social network conversations.

Modelling In-Patient Bed Usage Behaviour in a Department of Geriatric Medicine

1993 ◽  
Vol 32 (01) ◽  
pp. 79-81 ◽  
Author(s):  
P. Millard ◽  
S. McClean
Keyword(s):  
Census Data ◽  
Geriatric Medicine ◽  
Temporal Trends ◽  
Exponential Model ◽  
Bed Occupancy ◽  
Lengths Of Stay ◽  
Geriatric Hospital ◽  
Using Data ◽  
Acute Patients

Abstract:The flow of patients through geriatric hospitals has been previously described in terms of acute and long-stay states where the bed occupancy at a census point is modelled by a mixed exponential model. Using data for sixteen years the model was fitted to successive annual census points, in order to provide a description of temporal trends. While the number of acute patients has remained fairly stable during the period, the model shows that there has been a decrease in the number of long-stay patients. Mean lengths of stay in our geriatric hospital before death or discharge have decreased during the study period for both acute and long-stay patients.Using these fits of the mixed exponential model to census data, a method is provided for predicting future turnover of patients. These predictions are reasonably good, except when the turnover patterns go through a period of flux in which assumption of stability no longer holds. Overall, a methodology is presented which relates census analysis to the behaviour of admission cohorts, thus producing a means of predicting future behaviour of patients and identifying where there is a change in patterns.

Temporal Trends of Peptic Ulcer Disease in Kashmir, India

JMS SKIMS ◽  
2012 ◽  
Vol 15 (2) ◽  
pp. 136-140
Author(s):  
G M Gulzar ◽  
Showkat A Zargar ◽  
Muzaffar Nazir ◽  
Gul Javid ◽  
Bashir A Khan ◽  
...  
Keyword(s):  
Peptic Ulcer ◽  
Peptic Ulcer Disease ◽  
Gastric Outlet Obstruction ◽  
Temporal Trends ◽  
Outlet Obstruction ◽  
Life Time ◽  
Point Prevalence ◽  
Asymptomatic Group ◽  
Ulcer Disease ◽  
Ulcer Perforation

BACKGROUND: Since late 1960s, the prevalence of peptic ulcer disease and its complications has been steadily decreasing. OBJECTIVE: To ascertain the changing trends in the prevalence and complications of peptic ulcer in Kashmir. METHODS: A cohort of 10474 people aged 15-60 years in district Baramulla of Kashmir was interviewed about symptoms, complications, and surgery related to peptic ulcer. People were enquired about smoking, use of NSAIDs, H2 Receptor antagonists, proton pump inhibitors and endoscopies. All symptomatic and randomly selected group of asymptomatic people underwent esophago-gastro-cluodenoscopy. RESULTS: In symptomatic group, 286 (41.45%) people hod peptic ulcer and in asymptomatic group 24 (5.35%) had peptic ulcer. There were 71 already diagnosed cases of peptic ulcer; totaling 381. Thirty three people had surgery for peptic ulcer. The point prevalence of peptic ulcer was 3.54% and lifetime prevalence 8.96%. The highest prevalence was in 4th decade. Bleeding was seen in 23.63%, gastric outlet obstruction 4.20%, ulcer perforation 0.52%. 9.39% of peptic ulcer patients had undergone surgery. When compared to previous study in 1985 in Kashmir, there was decrease in point prevalence of 25%, in life-time prevalence of 20.14%, Gastric outlet obstruction by 51.7%, ulcer perforation by 87%, surgery rate by 60% and bleeding by a marginal 2%. CONCLUSION: Prevalence of peptic ulcerand its complications (except bleeding) are showing downward trend in Kashmir over the last 20 years. JMS 2012;15(2):136-40

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