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Monica Fallon, Oliver Valero, Marta Pazos, Alfonso Antón
Imaging devices such as the Heidelberg Retinal Tomograph (HRT3), scanning laser polarimetry (GDx), and optical coherence tomography (OCT), play an important role in glaucoma diagnosis. A systematic search for evidence-based data was performed for prospective studies evaluating the diagnostic accuracy of HRT3, GDx and OCT. The diagnostic odds ratio (DOR) was calculated. To compare the accuracy among instruments and parameters, a meta-analysis considering the hierarchical summary receiver operating characteristic (H-SROC) model was performed...
January 13, 2017: Survey of Ophthalmology
Takahiro Watari, Trung Cuong Mai, Daisuke Tanikawa, Yuga Hirakata, Masashi Hatamoto, Kazuaki Syutsubo, Masao Fukuda, Ngoc Bich Nguyen, Takashi Yamaguchi
Conventional aerated tank technology is widely applied for post treatment of natural rubber processing wastewater in Southeast Asia; however, a long hydraulic retention time (HRT) is required and the effluent standards are exceeded. In this study, a downflow hanging sponge (DHS) reactor was installed as post treatment of anaerobic tank effluent in a natural rubber factory in South Vietnam and the process performance was evaluated. The DHS reactor demonstrated removal efficiencies of 64.2 ± 7.5% and 55.3 ± 19...
January 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Bhishma P Patel, Arvind Kumar
  The removal of 2,4-dichlorophenol (2,4-DCP) by a pure culture of Bacillus endophyticus strain immobilized on ceramic balls was studied in a packed bed biofilm reactor (PBBR). The biodegradation of 2,4-DCP was studied in fed-batch and continuous mode and the effect of different parameters such as hydraulic retention time (HRT), biogenetic substrate concentration, and loading rate on the removal of 2,4-DCP were evaluated. Field emission scanning electron microscope (FESEM) results established the biofilm formation on the ceramic beads...
December 1, 2016: Water Environment Research: a Research Publication of the Water Environment Federation
Xinyu Zhu, Laura Treu, Panagiotis G Kougias, Stefano Campanaro, Irini Angelidaki
Upflow anaerobic sludge blanket (UASB) technology refers to reactor technology where granules, i.e. self-immobilised microbial associations, are the biological catalysts involved in the anaerobic digestion process. During the start-up period, UASB reactors operate at relatively long HRT and therefore the liquid phase of the reactor becomes a favourable environment for microbial growth. The current study aimed to elucidate the dynamicity of the suspended microbial community in UASB reactors, during the transition from mesophilic to thermophilic conditions...
January 2, 2017: Anaerobe
Zheng Wang, Xiang Fei, Sheng-Bing He, Jung-Chen Huang, Wei-Li Zhou
This study was carried out to investigate the possibility of a thiosulfate-driven autotrophic denitrification for nitrate-N removal from micro-polluted surface water. The aim was to study the effects of [Formula: see text] ratio (S/N molar ratio) and hydraulic retention time (HRT) on the autotrophic denitrification performance. Besides, utilization efficiencies of [Formula: see text] along the biofilter and the restart-up of the bioreactor were also investigated. Autotrophic denitrification using thiosulfate as an electron donor for treating micro-polluted surface water without the addition of external alkalinity proved to be feasible and the biofilter could be readied in two weeks...
January 18, 2017: Environmental Technology
Mengna Liao, Ge Yu, Ya Guo
Poyang Lake is suffering from persistent eutrophication, which is degrading the local ecosystem. A better understanding of the mechanisms that drive eutrophication in lake systems is essential to fight the ongoing deterioration. In this study, hydraulic residence time (HRT) was used to evaluate Poyang Lake's trophic state. A hydrology and ecosystem forced model was constructed to simulate long-term changes in algae and aquatic plant biomass and total phosphorous (TP). A comparison analysis revealed that between 1812 and 1828 (i...
2017: PloS One
Bruna Coelho Lopes, Ananda Lima Sanson, Sérgio Francisco de Aquino, Cláudio Leite de Souza, Carlos Augusto de Lemos Chernicharo, Robson José de Cássia Franco Afonso
This work has assessed the seasonal changes and the dynamics in the concentration of six pharmaceutical compounds during photolysis as a tertiary treatment of sewage previously treated by an anaerobic/aerobic system comprised by a UASB (Upflow Anaerobic Sludge Blanket) reactor and a trickling filter (TF). The target compounds were 4 antibiotics (ciprofloxacin, clindamycin, sulfamethoxazole, trimetoprime), 1 beta blocker (atenolol) and 1 anti-inflammatory (diclofenac). Six hydraulic retention times (HRT) were evaluated (5, 10, 20, 40, 80 and 160 minutes) with the intent of varying the UVC radiation doses applied to the effluent from biological treatment containing the target contaminants...
January 3, 2017: Environmental Technology
Luiz Gustavo de Almeida Chuffa, Luiz Antonio Lupi-Júnior, Aline Balandis Costa, João Paulo de Arruda Amorim, Fábio Rodrigues Ferreira Seiva
Sex steroids have been widely described to be associated with a number of human diseases, including hormone-dependent tumors. Several studies have been concerned about the factors regulating the availability of sex steroids and its importance in the pathophysiological aspects of the reproductive cancers in women. In premenopausal women, large fluctuations in the concentration of circulating estradiol (E2) and progesterone (P4) orchestrate many events across the menstrual cycle. After menopause, the levels of circulating E2 and P4 decline but remain at high concentration in the peripheral tissues...
February 2017: Steroids
Fabrício Motteran, Paulo C F Lima Gomes, Edson L Silva, Maria Bernadete A Varesche
This study presents a new method developed for the simultaneous determination of anionic surfactant (linear alkylbenzene sulfonate - LAS, 4 homologs) and nonionic surfactant (linear alcohol ethoxylate - LAE) in commercial laundry wastewater. The surfactants were identified and quantified using online column-switching solid-phase extraction (SPE) coupled with liquid chromatography/tandem mass spectrometry (LC-MS/MS). Ten and three transitions (m/z) were identified for LAS and LAE, respectively. The detection and quantification limits were 75 and 200μg/L for LAS, respectively, and 75μg/L for LAE...
December 28, 2016: Science of the Total Environment
Chao-Yu Chen, Yao-Hsu Yang, Chuan-Pin Lee, Ting-Yao Wang, Bi-Hua Cheng, Yin-Cheng Huang, Pau-Chung Chen, Sophie Hsin-Yi Liang, Michael Dewey, Vincent Chin-Hung Chen
OBJECTIVE: Depression happens commonly in cancer patients. However, there is limited literature on uterine cancer. In this study, we aimed to evaluate the association between uterine cancer and depression as well as the moderating effect of age and hormone replacement therapy (HRT). METHODS: This was a population-based study utilizing Taiwan's National Health Insurance Research Database. We conducted a matched cohort study and identified 6526 patients with uterine cancer and 65260 controls...
December 28, 2016: Psycho-oncology
Sachin Paudel, Youngjun Kang, Yeong-Seok Yoo, Gyu Tae Seo
Two-stage anaerobic digestion system consisting of two continuously stirred tank reactors (CSTRs) operating at mesophillic conditions (37°C) were studied. The aim of this study is to determine optimum Hydraulic Retention Time (HRT) of the two-stage anaerobic digester system for hydrogen and methane production. This paper also discusses the effect of OLR with change in HRT on the system. Four different HRTs of 48, 24, 12, 8h were monitored for acidogenic reactor, which provided OLR of 17.7, 34.8, 70.8, 106gVS/L·d respectively...
December 22, 2016: Waste Management
Kranti Kuruti, Sameena Begum, Shruti Ahuja, Gangagni Rao Anupoju, Sudharshan Juntupally, Bharath Gandu, Devender Kumar Ahuja
The aim of the present work was to study and infer a full scale experience on co-digestion of 1000kg of FW (400kg cooked food waste and 600kg uncooked food waste) and 2000L of rice gruel (RG) on daily basis based on a high rate biomethanation technology called "Anaerobic gas lift reactor" (AGR). The pH of raw substrate was low (5.2-5.5) that resulted in rapid acidification phenomena with in 12h in the feed preparation tank that facilitated to obtain a lower hydraulic residence time (HRT) of 10days. At full load, AGR was fed with 245kg of total solids, 205kg of volatile solids (167kg of organic matter in terms of chemical oxygen demand) which resulted in the generation of biogas and bio manure of 140m(3)/day and 110kg/day respectively...
December 5, 2016: Bioresource Technology
Omar Rahman, Joseph McGuire, Eric A Storch, Adam B Lewin
OBJECTIVES: This study evaluated the treatment efficacy of habit reversal training (HRT) relative to treatment as usual (TAU) for children and adolescents aged 7-17 years with a primary diagnosis of trichotillomania (TTM). METHOD: An initial assessment consisting of semistructured interviews and rating scales was conducted. Participants (N = 40, 85% female) meeting diagnostic criteria for TTM were randomized to either 8 weekly sessions of HRT by trained therapists or 8 weeks of TAU...
December 22, 2016: Journal of Child and Adolescent Psychopharmacology
A Mark Ibekwe, Shelton E Murinda, Marcia A Murry, Gregory Schwartz, Trygve Lundquist
Dynamics of seasonal microbial community compositions in algae cultivation ponds are complex. However, there is very limited knowledge on bacterial communities that may play significant roles with algae in the bioconversion of manure nutrients to animal feed. In this study, water samples were collected during winter, spring, summer, and fall from the dairy lagoon effluent (DLE), high rate algae ponds (HRAP) that were fed with diluted DLE, and municipal waste water treatment plant (WWTP) effluent which was included as a comparison system for the analysis of total bacteria, Cyanobacteria, and microalgae communities using MiSeq Illumina sequencing targeting the 16S V4 rDNA region...
December 18, 2016: Science of the Total Environment
Xianshu Liu, Jie Ding, Nanqi Ren, Qingyue Tong, Luyan Zhang
In this study, the high-production-volume chemical benzothiazole (BTH) from synthetic water was fully degraded into less toxic intermediates of simple organic acids using an up-flow internal circulation microbial electrolysis reactor (UICMER) under the hydraulic retention time (HRT) of 24 h. The bioelectrochemical system was operated at 25 ± 2 °C and continuous-flow mode. The BTH loading rate varied during experiments from 20 g·m(-3)·day(-1) to 110 g·m(-3)·day(-1). BTH and soluble COD (Chemical Oxygen Demand) removal efficiency reached 80% to 90% under all BTH loading rates...
December 20, 2016: International Journal of Environmental Research and Public Health
Danijela Lekovic, Predrag Miljic, Aleksandar Dmitrovic, Jecko Thachil
Women are increasingly encouraged to participate in making decisions about hormone replacement therapy (HRT). In postmenopausal women with severe vasomotor symptoms, HRT can significantly improve the quality of life. However, the use of HRT may also increase the risk of venous thromboembolism (VTE), the risk which depends of both treatment-related and patient-related factors. This review summarizes some important points about the selection of the safest hormonal replacement modality in women with a history of VTE and management of VTE risks in postmenopausal women wishing to take HRT...
December 15, 2016: Blood Reviews
M Wong, B Crnobrnja, V Liberale, K Dharmarajah, M Widschwendter, D Jurkovic
STUDY QUESTION: What is the natural history of endometrial polyps in women who are managed expectantly? SUMMARY ANSWER: The growth rates of expectantly managed polyps vary considerably and cannot be accurately predicted. WHAT IS KNOWN ALREADY: The majority of polyps detected on ultrasound are treated surgically, and therefore little is known about their natural history. Some polyps have been reported to regress spontaneously without the need for treatment; however, the factors predictive of regression are unknown...
December 18, 2016: Human Reproduction
Deepa J Shetty, Pranav Kshirsagar, Sneha Tapadia-Maheshwari, Vikram Lanjekar, Sanjay K Singh, Prashant K Dhakephalkar
Anaerobic digestion is the most cost effective technology for sustainable biogas production from rice straw. Rice straw was subjected to ambient pretreatment with alkali and subsequently digested anaerobically. A dimensional equation was developed to predict the efficacy of alkali treatment in terms of soluble COD. Biomethanation process parameters like temperature, initial pH, particle size, substrate/inoculum ratio, trace element supplementation, C/N ratio and hydraulic retention time were optimized. The highest biogas production under optimized conditions was 514L/kg VS/day (∼59% CH4) from milled rice straw (1mm) pretreated with sodium hydroxide (1% w/v) at ambient temperature for 180min...
February 2017: Bioresource Technology
Lucas Rodrigues Ramos, Edson Luiz Silva
The objective of this study was to investigate the effects of hydraulic retention time (HRT) (8 to 0.5 h) and temperature (55 to 75 °C) in two anaerobic fluidized bed reactors (AFBR) using cheese whey (AFBR-CW = 10,000 mg sugars L(-1)) and vinasse (AFBR-V = 10,000 mg COD L(-1)) as substrates. Decreasing the HRT to 0.5 h increased the hydrogen production rates in both reactors, with maximum values of 5.36 ± 0.81 L H2 h(-1) L(-1) in AFBR-CW and 0.71 ± 0.16 L H2 h(-1) L(-1) in AFBR-V. The optimal conditions for hydrogen production were the HRT of 4 h and temperature of 65 °C in AFBR-CW, observing maximum hydrogen yield (HY) of 5...
December 16, 2016: Applied Biochemistry and Biotechnology
Guo-Jun Xie, Chen Cai, Shihu Hu, Zhiguo Yuan
Partial nitritation and Anammox processes are increasingly used for nitrogen removal from anaerobic sludge digestion liquor. However, their nitrogen removal efficiency is often limited due to the production of nitrate by the Anammox reaction and the sensitivity to the nitrite to ammonium ratio. This work develops and demonstrates an innovative process that achieves complete nitrogen removal from partially nitrified anaerobic sludge digestion liquor through the use of a membrane biofilm reactor (MBfR), with methane supplied through hollow fiber membranes...
December 30, 2016: Environmental Science & Technology
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