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Honggang Zhang, Tao Lyu, Lei Bi, Grant Tempero, David P Hamilton, Gang Pan
Combating hypoxia/anoxia is an increasingly common need for restoring natural waters suffering from eutrophication. Oxygen nanobubble modified natural particles were investigated for mitigating hypoxia/anoxia at the sediment-water interface (SWI) in a simulated column experiment. By adding oxygen nanobubble modified zeolites (ONMZ) and local soils (ONMS), the oxygen nanobubble concentrations (105 -107  particles/mL) were several orders of magnitude higher in the water than the original water solution (104  particles/mL) within 24 h...
May 10, 2018: Science of the Total Environment
Ilari Pulli, Taru Lassila, Guoping Pan, Daoguang Yan, Vesa M Olkkonen, Kid Törnquist
Oxysterol-binding protein related-protein 5 and 8 (ORP5/8) localize to the membrane contact sites (MCS) of the endoplasmic reticulum (ER) and the mitochondria, as well as to the ER-plasma membrane (PM) MCS. The MCS are emerging as important regulators of cell signaling events, including calcium (Ca2+ ) signaling. ORP5/8 have been shown to interact with phosphatidylinositol-4,5-bisphosphate (PIP2 ) in the PM, and to modulate mitochondrial respiration and morphology. PIP2 is the direct precursor of inositol trisphosphate (IP3 ), a key second messenger responsible for Ca2+ -release from the intracellular Ca2+ stores...
March 13, 2018: Cell Calcium
Xiaocheng Wei, Dongfang Liu, Wenjiao Li, Lirui Liao, Zhendong Wang, Weiwei Huang, Wenli Huang
Biochar was applied during the bioleaching of heavy metals (HMs) from swine manure (SM), in an attempt to accelerate the HMs removal rates and to reduce the losses of nutrient elements (nitrogen and phosphorus). Results showed that the addition of biochar (5gL-1 ) could not only significantly shorten the leaching time of HMs (Cu, Zn, Mn and Cd) from 10 (control) to 7days with a high solubilization efficiency of 90%, but also decrease the total nitrogen loss efficiency by 42.7% from 180.3 (control) to 103.3mgL-1 in the leachate...
August 1, 2018: Science of the Total Environment
Raisa S Pompe, Burkhard Beyer, Alexander Haese, Felix Preisser, Uwe Michl, Thomas Steuber, Markus Graefen, Hartwig Huland, Pierre I Karakiewicz, Derya Tilki
OBJECTIVES: To analyze time trends and contemporary rates of postoperative complications after RP and to compare the complication profile of ORP and RALP using standardized reporting systems. MATERIALS & METHODS: Retrospective analysis of 13,924 RP patients in a single institution (2005 to 2015). Complications were collected during hospital stay and via standardized questionnaire 3 months after and grouped into eight schemes. Since 2013, the revised Clavien-Dindo classification was used (n = 4,379)...
May 4, 2018: BJU International
Ahmad Majzoub, Mohamad Arafa, Mohamed Mahdi, Ashok Agarwal, Sami Al Said, Ibrahim Al-Emadi, Walid El Ansari, Alia Alattar, Khalid Al Rumaihi, Haitham Elbardisi
Objective: To assess seminal oxidation-reduction potential (ORP) and sperm DNA fragmentation (SDF) in male infertility and their relationships with sperm morphology in fertile and infertile men. Patients and methods: Prospective case-control study comparing the findings of infertile men ( n  = 1168) to those of men with confirmed fertility ( n  = 100) regarding demographics and semen characteristics (conventional and advanced semen tests). Spearman rank correlation assessed the correlation between ORP, SDF, and different morphological indices...
March 2018: Arab Journal of Urology
Ashok Agarwal, Emily Qiu, Rakesh Sharma
Objectives: To evaluate different laboratory assessments of oxidative stress (OS) in semen and identify a cost-efficient and highly sensitive instrument capable of providing a comprehensive measure of OS in a clinical setting, as early intervention and an accurate diagnostic test are important because they help maintain a balance of free radicals and antioxidants; otherwise, excessive OS could lead to sperm damage and result in male infertility. Materials and methods: A systematic literature search was performed through a MedLine database search using the keywords 'semen' AND 'oxygen reduction potential'...
March 2018: Arab Journal of Urology
Xuelan Liu, Yan Zhang, Xinhua Li, Chunyan Fu, Tianhong Shi, Peipei Yan
Horizontal subsurface constructed wetlands (HSSF-CWs) planted with Phragmites australis were established to examine the effect of influent nitrogen loads on the removal efficiencies of nitrogen and chemical oxygen demand (COD) during different plant growth periods of plants. Under low influent nitrogen loads, most of the dissolved oxygen was consumed during the oxidation of organic matter in the wetland systems, and a dissimilatory nitrate reduction to ammonium (DNRA) may have occurred in HSSF-CWs when excessive amounts of organic matter were present, which limited the nitrification of ammonium nitrogen (NH4 -N) and hindered the NH4 -N removal...
April 24, 2018: Science of the Total Environment
Jia Liu, Wenyan Zhang, Haijian Du, Xiaoyun Leng, Jin-Hua Li, Hongmiao Pan, Jianhong Xu, Long-Fei Wu, Tian Xiao
There are two genetically distinct morphological types of multicellular magnetotactic prokaryotes (MMPs) in the intertidal zone of Lake Yuehu (China): ellipsoidal MMPs (eMMPs) and spherical MMPs (sMMPs). We studied the vertical distribution of both types of MMPs in the sediment at Lake Yuehu during one year. Both types of MMPs were observed at sediment depths ranging from 1 to 34 cm, depending on the seasons. The eMMPs distributed at depths of 2-34 cm during spring, 1-11 cm during summer, 2-21 cm during autumn, and 9-32 cm during winter...
April 24, 2018: Environmental Microbiology Reports
Deepak Kumar, Anshuman Singh, Rishi Kumar Jha
Investigation of presence of Uranium (U) in groundwater/drinking water is an active are of research due to its chemical and radiological toxicity as well as long-term health effects. The current study had the objective of estimating U as a naturally occurring radioactive element in groundwater samples and assessment of ingestion dose, when groundwater is the source of drinking water. The random sampling method was chosen for the collection of samples based on population density. The estimation of U was done using LED fluorimeter...
April 21, 2018: Environmental Science and Pollution Research International
Haijian Yang, Qiaoning He, Chunxiang Hu
Background: Compared with other general energy crops, microalgae are more compatible with desert conditions. In addition, microalgae cultivated in desert regions can be used to develop biodiesel. Therefore, screening oil-rich microalgae, and researching the algae growth, CO2 fixation and oil yield in desert areas not only effectively utilize the idle desertification lands and other resources, but also reduce CO2 emission. Results: Monoraphidium dybowskii LB50 can be efficiently cultured in the desert area using light resources, and lipid yield can be effectively improved using two-stage induction and semi-continuous culture modes in open raceway ponds (ORPs)...
2018: Biotechnology for Biofuels
David Polson, Nuria Villalba, Kalev Freeman
OBJECTIVES: Oxidation-reduction potential (ORP) measurement can demonstrate the extent of oxidative stress in patients with severe illness and/or injury. A novel ORP diagnostic platform using disposable sensors (RedoxSYS) has been validated by comparison to mass spectrometry, but the optimal methods of sample handling for best performance of the device have not been described. METHODS: We sought to optimize ORP measurement in human plasma under controlled conditions...
December 2018: Redox Report: Communications in Free Radical Research
Simge Varol, İlknur Köse
In this study, the physicochemical parameters, major ions and arsenic (As) contents of water resources in the Yazır lake wetland, were evaluated. In addition, water resources in this region were investigated from the point of water quality and health risk assessment. Thirty water samples were collected from the area in dry and wet seasons. Ca-Mg-HCO3 and Ca-HCO3 were the dominant water types. The Gibbs diagram suggests that most of the samples fall in rock-dominance zone, which indicates the groundwater interaction between rock chemistry...
March 29, 2018: Environmental Science and Pollution Research International
R Aharonov-Nadborny, L Tsechansky, M Raviv, E R Graber
Olive mill wastewater (OMWW) is an acidic, saline, and organic matter-rich aqueous byproduct of olive oil production that is usually disposed of by spreading on agricultural soils. This study tested whether spreading OMWW can release indigenous soil metals (Fe, Mn, Cu and Zn) through pH, redox, and DOM complexation-related mechanisms, using three agricultural soils having different textures and chemical properties, and controlled pH and redox conditions (pH5.6 or 8.4; ORP from -200 to +250mV). Comparison treatments included a solution having the same salt content and composition as OMWW but lacking OM, and deionized water (DW)...
March 1, 2018: Science of the Total Environment
Stefanie von Mechow, Markus Graefen, Alexander Haese, Pierre Tennstedt, Dirk Pehrke, Frank Friedersdorff, Burkhard Beyer
PURPOSE: To compare the duration of sick leave in patients with localized prostate cancer after robot-assisted radical prostatectomy (RARP) and open retropubic RP (ORP) at a German high-volume prostate cancer center. METHODS: The data of 1,415 patients treated with RP at Martini Klinik, Prostate Cancer Center between 2012 and 2016 were, retrospectively, analyzed. Information on employment status, monthly revenues and days of work missed due to sickness were assessed via online questionnaire...
March 15, 2018: Urologic Oncology
Xuan Shi, Huu Hao Ngo, Langtao Sang, Pengkang Jin, Xiaochang C Wang, Guanghua Wang
In this study, a pilot combined sewer system was constructed to characterize the pollutant transformation in sewer sediment. The results showed that particulate contaminants deposited from sewage could be transformed into dissolved matter by distinct pollutant transformation pathways. Although the oxidation-reduction potential (ORP) was varied from -80 mV to -340 mV in different region of the sediment, the fermentation was the dominant process in all regions of the sediment, which induced hydrolysis and decomposition of particulate contaminants...
March 13, 2018: Environmental Pollution
Jiade Wang, Tian Zhang, Yu Mei, Bingjun Pan
Reverse osmosis concentrate (ROC) of printing and dyeing wastewater remains as a daunting environmental issue, which is characterized by high salinity, chemical oxygen demand (COD), chroma and low biodegradability. In this study electro-oxidation process (PbO2 /Ti electrode) coupled with oxidation-reduction potential (ORP) online monitor was applied to treat such a ROC effluent. The results show that with the increase of specific electrical charge (Qsp ), the removal efficiencies of COD, TN and chroma increased significantly at the incipience and then reached a gentle stage; the optimal total current efficiency (12...
March 8, 2018: Chemosphere
Antonietta Pietrangelo, Neale D Ridgway
Oxysterol-binding protein (OSBP) and OSBP-related proteins (ORPs) constitute a large eukaryotic gene family that transports and regulates the metabolism of sterols and phospholipids. The original classification of the family based on oxysterol-binding activity belies the complex dual lipid-binding specificity of the conserved OSBP homology domain (OHD). Additional protein- and membrane-interacting modules mediate the targeting of select OSBP/ORPs to membrane contact sites between organelles, thus positioning the OHD between opposing membranes for lipid transfer and metabolic regulation...
March 13, 2018: Cellular and Molecular Life Sciences: CMLS
Luna Samanta, Ashok Agarwal, Nirlipta Swain, Rakesh Sharma, Banu Gopalan, Sandro C Esteves, Damayanthi Durairajanayagam, Edmund Sabanegh
PURPOSE: Varicocele may disrupt testicular microcirculation and induce hypoxia-ischemia related degenerative changes in testicular cells and spermatozoa. Superoxide production at low oxygen concentration exacerbates oxidative stress in men with varicocele. Therefore, the current study was designed to study the role of mitochondrial redox regulation and its possible involvement in sperm dysfunction in varicocele associated infertility. MATERIALS AND METHODS: We identified differentially expressed mitochondrial proteins in 50 infertile men with varicocele and in 10 fertile controls by secondary liquid chromatography-tandem mass spectroscopy data driven in silico analysis...
March 9, 2018: Journal of Urology
Wenqiang Zhang, Xin Jin, Xin Meng, Wenzhong Tang, Baoqing Shan
We studied the processes and mechanisms that drove phosphorus (P) release and transformations at the sediment-water interface (SWI) because of the decomposition of plant debris. The results showed that, as the simulation time increased, the pH, dissolved oxygen (DO), and oxidation reduction potential (ORP) in Duckweed+Sediment+Water (DWS) and Duckweed+Water (DW) initially decreased and then increased before stabilizing. Changes in the physicochemical characteristics affect the microhabitat and the release and transformations of P at the SWI...
June 2018: Chemosphere
Jianqiang Miao, Xiuhuan Li, Dong Lin, Xili Liu, Brett M Tyler
Oxysterol-binding protein (OSBP)-related proteins (ORPs) are a large conserved family of lipid transfer proteins in eukaryotes. In oomycetes, some ORPs are the target of the novel oomycide oxathiapiprolin. By searching the Phytophthora sojae genome database, two ORP proteins, PsORP1 (Protein ID: 558498) and PsORP2 (Protein ID: 470921), were found. Here, we investigated the biological function of PsORP2. The expression level of PsORP2 was higher in germinated cysts and late infection than in other developmental stages...
March 9, 2018: Environmental Microbiology Reports
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