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https://www.readbyqxmd.com/read/28936691/assessment-of-the-isodesmic-method-in-the-calculation-of-standard-reduction-potential-of-copper-complexes
#1
Diego Chaparro, Jorge Alí-Torres
Molecular phenomena involving electron transfer and reduction/oxidation processes are of the utmost importance in chemistry. However, accurate computational calculations of standard reduction potentials (SRPs) for transition metal complexes are still challenging. For this reason, some computational strategies have been proposed in order to overcome the main limitations in SRP calculations for copper complexes. However, these strategies are limited to particular coordination spheres and do not represent a general methodology...
September 21, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28928132/seca-mediates-cotranslational-targeting-and-translocation-of-an-inner-membrane-protein
#2
Shuai Wang, Chien-I Yang, Shu-Ou Shan
Protein targeting to the bacterial plasma membrane was generally thought to occur via two major pathways: cotranslational targeting by signal recognition particle (SRP) and posttranslational targeting by SecA and SecB. Recently, SecA was found to also bind ribosomes near the nascent polypeptide exit tunnel, but the function of this SecA-ribosome contact remains unclear. In this study, we show that SecA cotranslationally recognizes the nascent chain of an inner membrane protein, RodZ, with high affinity and specificity...
September 19, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28918271/the-role-of-sulfate-reducing-prokaryotes-in-the-coupling-of-element-biogeochemical-cycling
#3
REVIEW
Peng Bao, Guo-Xiang Li, Guo-Xin Sun, Yao-Yang Xu, Andrew A Meharg, Yong-Guan Zhu
Sulfate-reducing prokaryotes (SRP) represent a diverse group of heterotrophic and autotrophic microorganisms that are ubiquitous in anoxic habitats. In addition to their important role in both sulfur and carbon cycles, SRP are important biotic and abiotic regulators of a variety of sulfur-driven coupled biogeochemical cycling of elements, including: oxygen, nitrogen, chlorine, bromine, iodine and metal(loid)s. SRP gain energy form most of the coupling of element transformation. Once sulfate-reducing conditions are established, sulfide precipitation becomes the predominant abiotic mechanism of metal(loid)s transformation, followed by co-precipitation between metal(loid)s...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28917313/field-evaluation-of-poultry-red-mite-dermanyssus-gallinae-native-and-recombinant-prototype-vaccines
#4
Kathryn Bartley, Frank Turnbull, Harry W Wright, John F Huntley, Javier Palarea-Albaladejo, Mintu Nath, Alasdair J Nisbet
Vaccination is a desirable emerging strategy to combat poultry red mite (PRM), Dermanyssus gallinae. We performed trials, in laying hens in a commercial-style cage facility, to test the vaccine efficacy of a native preparation of soluble mite extract (SME) and of a recombinant antigen cocktail vaccine containing bacterially-expressed versions of the immunogenic SME proteins Deg-SRP-1, Deg-VIT-1 and Deg-PUF-1. Hens (n=384 per group) were injected with either vaccine or adjuvant only (control group) at 12 and 17 weeks of age and then challenged with PRM 10days later...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28912893/the-role-of-nitric-oxide-during-sonoreperfusion-of-microvascular-obstruction
#5
Francois T H Yu, Xucai Chen, Adam C Straub, John J Pacella
Rationale: Microembolization during PCI for acute myocardial infarction can cause microvascular obstruction (MVO). MVO severely limits the success of reperfusion therapies, is associated with additional myonecrosis, and is linked to worse prognosis, including death. We have shown, both in in vitro and in vivo models, that ultrasound (US) and microbubble (MB) therapy (termed "sonoreperfusion" or "SRP") is a theranostic approach that relieves MVO and restores perfusion, but the underlying mechanisms remain to be established...
2017: Theranostics
https://www.readbyqxmd.com/read/28902358/serp1-is-a-novel-marker-of-poor-prognosis-in-pancreatic-ductal-adenocarcinoma-patients-via-anti-apoptosis-and-regulating-srprb-nf-%C3%AE%C2%BAb-axis
#6
Qiang Ma, Xiuxiu Wu, Jing Wu, Zhiyong Liang, Tonghua Liu
Stress associated endoplasmic reticulum protein 1 (SERP1), can cause accumulation of unfolded proteins in ER stress. However, studies on the role of SERP1 in pancreatic ductal adenocarcinoma (PDAC) are still incomplete. The present study aimed at identifying whether SERP1 acts as a potential novel prognostic marker of PDAC, and analyzed its possible mechanism. GEO database analysis showed SERP1 was significantly upregulated in PDAC tissues, and strongly associated with advanced clinical stage of PDAC patients from TCGA database...
October 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28881008/drivers-of-nitrogen-transfer-in-stream-food-webs-across-continents
#7
B C Norman, M R Whiles, S M Collins, A S Flecker, S K Hamilton, S L Johnson, E J Rosi-Marshall, L R Ashkenas, W B Bowden, C L Crenshaw, T Crowl, W K Dodds, R O Hall, R El-Sabaawi, N A Griffiths, E Marti, W H McDowell, S D Peterson, H M Rantala, T Riis, K S Simon, J L Tank, S A Thomas, D von Schiller, J R Webster
Studies of trophic-level material and energy transfers are central to ecology. The use of isotopic tracers has now made it possible to measure trophic transfer efficiencies of important nutrients and to better understand how these materials move through food webs. We analyzed data from thirteen (15) N-ammonium tracer addition experiments to quantify N transfer from basal resources to animals in headwater streams with varying physical, chemical, and biological features. N transfer efficiencies from primary uptake compartments (PUCs; heterotrophic microorganisms and primary producers) to primary consumers was lower (mean: 11...
September 7, 2017: Ecology
https://www.readbyqxmd.com/read/28878822/coexistence-and-competition-of-sulfate-reducing-and-methanogenic-populations-in-an-anaerobic-hexadecane-degrading-culture
#8
Ting-Ting Ma, Lai-Yan Liu, Jun-Peng Rui, Quan Yuan, Ding-Shan Feng, Zheng Zhou, Li-Rong Dai, Wan-Qiu Zeng, Hui Zhang, Lei Cheng
BACKGROUND: Over three-fifths of the world's known crude oil cannot be recovered using state-of-the-art techniques, but microbial conversion of petroleum hydrocarbons trapped in oil reservoirs to methane is one promising path to increase the recovery of fossil fuels. The process requires cooperation between syntrophic bacteria and methanogenic archaea, which can be affected by sulfate-reducing prokaryotes (SRPs). However, the effects of sulfate on hydrocarbon degradation and methane production remain elusive, and the microbial communities involved are not well understood...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28877277/treatment-of-experimental-periodontal-disease-by-laser-therapy-in-simvastatin-modified-rats
#9
Andressa Araújo Swerts, Bianca Fernanda Espósito Santos, Simone Ribeiro Bruzadelli, Maísa Ribeiro Pereira Lima Brigagão, Daniela Coelho de Lima, Leandro Araújo Fernandes
Objective: The aim of this study was to evaluate low-level laser therapy (LLLT) as an adjuvant treatment for scaling and root planing (SRP) for the treatment of induced periodontitis in simvastatin-modified rats. Material and Methods: A total of 180 rats were evenly divided into two groups: Veh - receiving oral administration of polyethylene glycol (vehicle); S - receiving oral administration of Simvastatin. Periodontal disease was induced in both groups at the first mandibular molar...
July 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28872188/does-the-adjunctive-use-of-statins-provide-additional-benefits-to-nonsurgical-periodontal-treatment-a-systematic-review-and-meta-analysis
#10
REVIEW
L M B Ambrósio, E S Rovai, D I Sendyk, M Holzhausen, C M Pannuti
Adjunctive therapeutic agents may be used to improve the response to nonsurgical periodontal therapy. Local delivery of statins (simvastatin, artovastatin and rosuvastatin) is a promising adjunct to scaling and root planing (SRP). Thus, the aim of this review is to evaluate if adjunctive local delivery of statins is more effective than SRP alone. Randomized clinical trials that presented a test group evaluating local delivery of statins as adjuncts in healthy, diabetic and smoking patients were included. Medline and the Cochrane library database were searched up to November 2016...
September 5, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28867771/gps-satellite-orbit-prediction-at-user-end-for-real-time-ppp-system
#11
Hongzhou Yang, Yang Gao
This paper proposed the high-precision satellite orbit prediction process at the user end for the real-time precise point positioning (PPP) system. Firstly, the structure of a new real-time PPP system will be briefly introduced in the paper. Then, the generation of satellite initial parameters (IP) at the sever end will be discussed, which includes the satellite position, velocity, and the solar radiation pressure (SRP) parameters for each satellite. After that, the method for orbit prediction at the user end, with dynamic models including the Earth's gravitational force, lunar gravitational force, solar gravitational force, and the SRP, are presented...
August 30, 2017: Sensors
https://www.readbyqxmd.com/read/28863395/comparison-of-repeated-applications-of-apdt-with-amoxicillin-and-metronidazole-in-the-treatment-of-chronic-periodontitis-a-short-term-study
#12
Letícia Helena Theodoro, Alessandra Barreto Lopes, Marta Aparecida Alberton Nuernberg, Marina Módolo Cláudio, Daniela Maria Janjacomo Miessi, Márcio Luiz Ferro Alves, Cristiane Duque, Andrea Mombelli, Valdir Gouveia Garcia
AIM: The aim of this study was to compare the clinical effects of Metronidazole (MTZ) combined with Amoxicillin (AMX) and repeated applications of antimicrobial photodynamic therapy (aPDT) as an adjuvant for the treatment of chronic periodontitis. METHODS: A double-blind controlled and randomized clinical trial was conducted in 34 patients. All of the patients were treated with scaling and root planing (SRP) and separated into 2 groups: the MTZ+AMX Group (n=17), who received SRP and the systemic use of MTZ (400mg 3×per day for 7days) and AMX (500mg 3×per day for 7days), and the aPDT Group (n=17), who received SRP and three aPDT applications at all sites with a probing depth≥5mm immediately, at 48 and 96h after scaling and placebo pills over the span of 7days...
August 9, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28855141/the-effect-of-local-and-systemic-statin-use-as-an-adjunct-to-non-surgical-and-surgical-periodontal-therapy-a-systematic-review-and-meta-analysis
#13
REVIEW
Kristina Bertl, Arlinda Parllaku, Nikolaos Pandis, Kåre Buhlin, Björn Klinge, Andreas Stavropoulos
OBJECTIVES: To evaluate the effect of local and/or systemic statin use as an adjunct to non-surgical and/or surgical periodontal therapy. DATA: Literature search according to PRISMA guidelines with the following eligibility criteria: (a) English or German language; (b) interventional studies; (c) statins as monotherapy or as an adjunct to non-surgical and/or surgical treatment of periodontitis; (d) clinical and/or radiographic treatment effect size of statin intake reported...
August 27, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28836329/the-effect-of-professional-tooth-cleaning-or-non-surgical-periodontal-therapy-on-oral-halitosis-in-patients-with-periodontal-diseases-a-systematic-review
#14
REVIEW
Hcd Deutscher, Shm Derman, A G Barbe, R Seemann, M J Noack
OBJECTIVE: The aim of this systematic review was to give the best available evidence on the impact of professional tooth cleaning (PTC) and scaling and root planing (SRP) on oral halitosis in patients with periodontal diseases. MATERIAL AND METHODS: Three databases were screened for relevant studies. Only randomized controlled trials (RCTs) or controlled clinical trials (CCT) were included. The primary outcome in all included studies was volatile sulphur compounds (VSC) measured by Halimeter or OralChroma and organoleptic scores as secondary outcome...
August 24, 2017: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/28833722/killing-two-birds-with-one-stone-response-to-pembrolizumab-in-a-patient-with-metastatic-melanoma-and-b-cell-chronic-lymphocytic-leukemia
#15
M Arenbergerova, A Fialova, P Arenberger, S Gkalpakiotis, T Jirasek, A Srp, A Novotna, H Frankova
Pembrolizumab, a humanized immunoglobulin G4 monoclonal antibody against PD-1, has demonstrated antitumor activity and a manageable safety profile in patients with different solid tumors and hematologic malignancies in multiple clinical trials (1-4). Although these data highlight the effectiveness of PD-1 pathway inhibition, some patients, even those with highly immunogenic tumors, such as melanoma, do not achieve objective response (1). An increased association of B-cell chronic lymphocytic leukemia (B-CLL) and melanoma, possibly related to an underlying immunologic defect, has been previously reported (5)...
August 22, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28827017/effects-on-hba1c-in-diabetic-patients-of-adjunctive-use-of-systemic-antibiotics-in-nonsurgical-periodontal-treatment-a-systematic-review
#16
Ronaldo Lira, Caroline de Moura Martins Lobo Dos Santos, Branca Heloisa de Oliveira, Ricardo Guimarães Fischer, Ana Paula Pires Dos Santos
OBJECTIVE: To assess the effects of adjunctive use of systemic antibiotics in nonsurgical periodontal treatment compared to nonsurgical periodontal treatment alone, on mean glycated haemoglobin (HbA1c) reductions in patients with diabetes. DATA: Two independent reviewers screened six electronic databases, registers of clinical trials, meeting abstracts and four major dental journals for controlled clinical trials with at least 3-month follow-up. SOURCES: After duplicates removal, electronic and hand searches yielded 2,136 records; 32 full-text articles were independently read by two reviewers...
August 4, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28818591/mobile-phosphorus-stratification-in-sediments-by-aluminum-immobilization
#17
Juan Lin, Qin Sun, Shiming Ding, Dan Wang, Yan Wang, Musong Chen, Lei Shi, Xianfang Fan, Daniel C W Tsang
There is a great heterogeneity in the distribution of mobile phosphorus (P) in natural sediments, while the assessment of P immobilization by amendment agents has mostly neglected this feature. In this study, the effects of aluminum sulfate (ALS) on P immobilization were investigated via a 60-day microcosm experiment using sampled sediment cores. The high-resolution dialysis (HR-Peeper) and diffusive gradients in thin films (DGT) techniques were first employed to establish the profiles of soluble reactive P (SRP) and DGT-labile P in aluminum-amended sediments at 2 and 1 mm resolutions, respectively...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28817773/surface-reaction-barriometry-methane-dissociation-on-flat-and-stepped-transition-metal-surfaces
#18
Davide Migliorini, Helen Chadwick, Francesco Nattino, Ana Gutiérrez-González, Eric Dombrowski, Eric A High, Han Guo, Arthur L Utz, Bret Jackson, Rainer D Beck, Geert-Jan Kroes
Accurately simulating heterogeneously catalyzed reactions requires reliable barriers for molecules reacting at defects on metal surfaces, such as steps. However, first-principles methods capable of computing these barriers to chemical accuracy have yet to be demonstrated. We show that state-resolved molecular beam experiments combined with ab initio molecular dynamics using specific reaction parameter density functional theory (SRP-DFT) can determine the molecule-metal surface interaction with the required reliability...
September 7, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28815247/-changes-of-cementum-endotoxin-levels-in-different-teeth-with-periodontitis-treated-with-root-conditioning
#19
Chang-Sheng Fu, Rong-Sen Liu, Yun Luo, Long Ou, Ying-Chao Li, Xian-Hua Zhang
PURPOSE: To observe the changes of endotoxin levels after different teeth with periodontitis were treated with different methods. METHODS: Six healthy premolars extracted for orthodontic reasons and 36 posterior teeth extracted due to severe periodontitis were selected. Each tooth was processed from two 4 mm×4 mm×1 mm cementum pieces 2 mm under the cementum-enamel junction, each tooth with periodontitis was numbered. Healthy teeth served as negative control group, one of the two tablets from each tooth with periodontitis was selected in the periodontitis group, which was not treated with root surface treatment...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28808553/parasite-and-host-elemental-content-and-parasite-effects-on-host-nutrient-excretion-and-metabolic-rate
#20
Nicole Chodkowski, Randall J Bernot
Ecological stoichiometry uses the mass balance of elements to predict energy and elemental fluxes across different levels of ecological organization. A specific prediction of ecological stoichiometry is the growth rate hypothesis (GRH), which states that organisms with faster growth or reproductive rates will require higher phosphorus content for nucleic acid and protein synthesis. Although parasites are found ubiquitously throughout ecosystems, little is understood about how they affect nutrient imbalances in ecosystems...
August 2017: Ecology and Evolution
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