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https://www.readbyqxmd.com/read/29228188/the-impact-of-environmental-factors-on-co2-fixation-by-microalgae
#1
Marcia Morales, León Sánchez, Sergio Revah
Microalgae are among the most productive biological systems for converting sunlight into chemical energy which is used to capture and transform inorganic carbon into biomass. The efficiency of CO2 capture depends on the cultivation system configuration (photobioreactors or open systems) and can vary according to the state of the algal physiology, the chemical composition of the nutrient medium and environmental factors, such as irradiance, temperature and pH. This mini-review is focused on some of the most important environmental factors determining photosynthetic activity, CO2 biofixation, cell growth rates and biomass productivities by microalgae...
December 6, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29227881/experiences-with-compulsory-drug-detention-among-people-who-inject-drugs-in-bangkok-thailand-a-qualitative-study
#2
Thomas Kerr, Will Small, Prempreeda Pramoj Na Ayutthaya, Kanna Hayashi
BACKGROUND: Thailand has employed a system of compulsory drug detention centres (CDDCs) where drug users are confined following arrest. Although concerns regarding CDDCs persist, research focused on CDDCs in Thailand is limited. We undertook this study to explore experiences with CDDCs among people who inject drugs (PWID) in Thailand. METHODS: Data were derived from the Mitsampan Community Research Project, a mixed- methods study involving PWID in Bangkok. Between July 2011 and June 2012, semi-structured, in-depth interviews were conducted with PWID who had been exposed to CDDCs...
December 8, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/29227651/total-syntheses-of-scaparvins-b-c-and-d-enabled-by-a-key-c-h-functionalization
#3
Qinda Ye, Pei Qu, Scott A Snyder
The clerodane diterpene family possesses an impressive range of bioactivities and high synthetic challenge due to their unique amalgamation of rings, stereocenters, and oxygenation. Herein, we disclose the first total syntheses of three members, scaparvins B, C, and D, through a route fueled by several chemoselective and carefully orchestrated steps. One such operation is a tailored late-stage C-H functionalization converting a carboxylic acid into a lactone through the oxidation of a tertiary C-H bond under conditions that minimize epoxidation of an alkene...
December 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29227634/release-of-particulate-iron-sulfide-during-shale-fluid-interaction
#4
Yevgeny Kreisserman, Simon Emmanuel
During hydraulic fracturing, a technique often used to extract hydrocarbons from shales, large volumes of water are injected into the subsurface. Although the injected fluid typically contains various reagents, it can become further contaminated by interaction with minerals present in the rocks. Pyrite, which is common in organic-rich shales, is a potential source of toxic elements, including arsenic and lead, and it is generally thought that for these elements to become mobilized, pyrite must first dissolve...
December 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29226201/acute-primary-total-knee-arthroplasty-for-proximal-tibial-fractures-in-elderly
#5
Mohammad M Sarzaeem, Mohammad M Omidian, Gholamhossein Kazemian, Alireza Manafi
Background: Proximal tibial fractures in elderly patients with osteoporosis or knee osteoarthritis (OA) are challenging cases. In the current study, we present our experience with uncommon acute primary total knee arthroplasty (PTKA) in this patient population. Methods: PTKAs were performed following proximal tibial fractures in 30 consecutive patients over 60 years of age with osteoporosis or knee OA between 2005 and 2009. Three constrained condylar knees (CCK) and no hinged knee prosthesis were used...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29226197/osteoporosis-and-the-management-of-spinal-degenerative-disease-i
#6
REVIEW
Félix Tomé-Bermejo, Angel R Piñera, Luis Alvarez-Galovich
Osteoporosis has become a major medical problem as the aged population of the world rapidly grows. Osteoporosis predisposes patients to fracture, progressive spinal deformities, and stenosis, and is subject to be a major concern before performing spine surgery, especially with bone fusions and instrumentation. Osteoporosis has often been considered a contraindication for spinal surgery, while in some instances patients have undergone limited and inadequate procedures in order to avoid concomitant instrumentation...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29225721/catalytic-hydrogenation-and-hydrodeoxygenation-of-furfural-over-pt-111-a-model-system-for-the-rational-design-and-operation-of-practical-biomass-conversion-catalysts
#7
Martin J Taylor, Li Jiang, Joachim Reichert, Anthoula C Papageorgiou, Simon K Beaumont, Karen Wilson, Adam F Lee, Johannes V Barth, Georgios Kyriakou
Furfural is a key bioderived platform chemical whose reactivity under hydrogen atmospheres affords diverse chemical intermediates. Here, temperature-programmed reaction spectrometry and complementary scanning tunneling microscopy (STM) are employed to investigate furfural adsorption and reactivity over a Pt(111) model catalyst. Furfural decarbonylation to furan is highly sensitive to reaction conditions, in particular, surface crowding and associated changes in the adsorption geometry: furfural adopts a planar geometry on clean Pt(111) at low coverage, tilting at higher coverage to form a densely packed furfural adlayer...
April 20, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/29225395/review-water-recovery-from-brines-and-salt-saturated-solutions-operability-and-thermodynamic-efficiency-considerations-for-desalination-technologies
#8
Leland M Vane
BACKGROUND: When water is recovered from a saline source, a brine concentrate stream is produced. Management of the brine stream can be problematic, particularly in inland regions. An alternative to brine disposal is recovery of water and possibly salts from the concentrate. RESULTS: This review provides an overview of desalination technologies and discusses the thermodynamic efficiencies and operational issues associated with the various technologies particularly with regard to high salinity streams...
March 8, 2017: Journal of Chemical Technology and Biotechnology
https://www.readbyqxmd.com/read/29225328/gallbladder-hypoplasia-a-congenital-abnormality-of-the-gallbladder-a-case-report
#9
Christophoros S Kosmidis, Georgios D Koimtzis, Maria S Kosmidou, Fotini Ieridou, Triantafyllia Koletsa, Katerina T Zarampouka, Eleni Georgakoudi, Isaac Kesisoglou
BACKGROUND There are different variations in the anatomy of the gallbladder. Congenital abnormalities of the gallbladder such as agenesis and hypoplasia are rare conditions and difficult to diagnose with imaging studies. Patients are usually asymptomatic or have symptoms that mimic gallstone disease. The diagnosis is often made intraoperatively and is established by histopathological examination. CASE REPORT We report a case of a 62-year-old male who had cholelithiasis symptoms and was falsely diagnosed with gallstone disease by abdominal ultrasound scan...
December 11, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/29225043/neurogranin-in-the-nucleus-accumbens-regulates-nmda-receptor-tolerance-and-motivation-for-ethanol-seeking
#10
Ashlie N Reker, Alfredo Oliveros, John M Sullivan, Lailun Nahar, David J Hinton, Taehyun Kim, Robert C Bruner, Doo-Sup Choi, Nicholas E Goeders, Hyung W Nam
Dysfunction of N-methyl-D-aspartate receptor (NMDAR) signaling in the nucleus accumbens (NAc) has been implicated in the pathophysiology of alcohol use disorders (AUD). Neurogranin (Ng), a calmodulin-binding protein, is exclusively expressed in the post-synapse, and mediates NMDAR driven synaptic plasticity by regulating the calcium-calmodulin (Ca2+-CaM) pathway. To study the functional role of Ng in AUD, we administrated behavior tests including Pavlovian instrument transfer (PIT), operant conditioning, and rotarod test using Ng null mice (Ng-/- mice)...
December 7, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29224861/a-survey-of-selected-animal-based-measures-of-dairy-cattle-welfare-in-the-eastern-alps-toward-context-based-thresholds
#11
A Zuliani, M Mair, M Kraševec, I Lora, M Brscic, G Cozzi, C Leeb, M Zupan, C Winckler, S Bovolenta
In the Alps, traditional dairy farms are small-scale operations where vertical transhumance from valley indoor housing systems to highland pasture-based systems is still practiced in summer. Vertical transhumance implies a substantial change of environment, available resources, and management practices from one season to another. In such systems, animal-based welfare measures need to be monitored throughout the year to capture the variation of welfare outcomes, based on which targeted welfare management plans can be implemented...
December 7, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29224825/head-and-neck-free-flap-reconstruction-what-is-the-appropriate-post-operative-level-of-care
#12
Varun V Varadarajan, Hassan Arshad, Peter T Dziegielewski
Patients undergoing head and neck reconstruction require complex, multidisciplinary postoperative care which may include wound care, flap monitoring, tracheostomy management, and management of comorbid conditions. Historically, patients undergoing major resection of a head and neck or aerodigestive tract malignancy with regional or free flap reconstruction were routinely admitted to the ICU. Although head and neck cancer patients may have multiple medical comorbidities that may require postoperative critical care, the current trend in many institutions is to transfer stable and less medically complex patients to non-intensive care-level units with specialty trained nursing staff...
December 2017: Oral Oncology
https://www.readbyqxmd.com/read/29224263/-strategies-for-the-prevention-and-control-of-bleeding-due-to-vascular-injury-in-thoracoscopic-lung-surgery
#13
J D Mei, Q Pu, L Ma, C W Liu, L X Liu
The technique of thoracoscopic lung surgery has gradually matured. Nowadays, thoracoscope is recommended as the most preferred approach for surgical treatment of early stage non-small cell lung cancer in different guidelines. However, there are still some cases of accidential major bleeding due to vascular injury during thoracoscopic lung surgery. The wall of the hilum vessels is relatively thin. These vessels often involve a great portion of the cardiac output blood flow. Once the injury happened, the emergent condition may be life-threatening due to massive blood loss...
December 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29224246/circadian-peak-dopaminergic-activity-response-at-the-biological-clock-pacemaker-suprachiasmatic-nucleus-area-mediates-the-metabolic-responsiveness-to-a-high-fat-diet
#14
Shuqin Luo, Yahong Zhang, Michael Ezrokhi, Yang Li, Tsung-Huang Tsai, Anthony H Cincotta
Among vertebrate species of the major vertebrate classes in the wild, a seasonal rhythm of whole body fuel metabolism, oscillating from lean to obese condition, is a common biological phenomenon. This annual cycle is driven in part by annual changes in the circadian dopaminergic signaling at the suprachiasmatic nuclei (SCN), with diminution of circadian peak dopaminergic activity at the SCN facilitating development of the seasonal obese insulin resistant condition. The present study investigated whether such an ancient circadian dopamine-SCN activity system for expression of the seasonal obese, insulin resistant phenotype may be operative in animals made obese, insulin resistant by high fat feeding and if so whether reinstatement of the circadian dopaminergic peak at the SCN would be sufficient to reverse the adverse metabolic impact of the high fat diet without alteration of caloric intake...
December 10, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29224124/underestimated-effects-of-sediments-on-enhanced-startup-performance-of-biofilm-systems-for-polluted-source-water-pretreatment
#15
Zheng-Hui Lv, Jing Wang, Guang-Feng Yang, Li-Juan Feng, Jun Mu, Liang Zhu, Xiang-Yang Xu
In order to evaluate the enhancement mechanisms of enhanced startup performance in biofilm systems for polluted source water pretreatment, three lab-scale reactors with elastic stereo media (ESM) were operated under different enhanced sediment and hydraulic agitation conditions. It is interesting to found the previously underestimated or overlooked effects of sediment on the enhancement of pollutants removal performance and enrichment of functional bacteria in biofilm systems. The maximum NH4+-N removal rate of 0...
December 9, 2017: Biodegradation
https://www.readbyqxmd.com/read/29223860/time-resolution-requirements-for-civilian-radioxenon-emission-data-for-the-ctbt-verification-regime
#16
Pieter De Meutter, Johan Camps, Andy Delcloo, Benoît Deconninck, Piet Termonia
The capability of the noble gas component of the International Monitoring System as a verification tool for the Comprehensive Nuclear-Test-Ban Treaty is deteriorated by a background of radioxenon emitted by civilian sources. One of the possible approaches to deal with this issue, is to simulate the daily radioxenon concentrations from these civilian sources at noble gas stations by using atmospheric transport models. In order to accurately quantify the contribution from these civilian sources, knowledge on the releases is required...
December 6, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29223716/alkaline-degradation-of-lyophilized-dmsa-prior-to-labeling-with-99mtc-identification-and-development-of-the-degradation-pathway-by-hplc-and-ms
#17
Erika V Almeida, Samuel L De Brito
INTRODUCTION: Complexes of technetium-99m (99mTc) with meso-dimercaptosuccinic acid (DMSA) have been widely used as diagnostic agents in nuclear medicine. The degradation products (DP) of DMSA formed under different forced conditions have been identified through HPLC-DAD and LC-MSn studies. In this study, the DMSA kit was subjected to forced degradation under hydrolysis conditions as prescribed by the International Conference on Harmonization (ICH) guideline Q1A. METHODS: Chromatographic separation was accomplished on a reverse phase Shim-Pack VP-ODS (150 mm × 4...
November 10, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/29223635/three-dimensional-superimposition-for-patients-with-facial-palsy-an-innovative-method-for-assessing-the-success-of-facial-reanimation-procedures
#18
C Sforza, E Ulaj, D M Gibelli, F Allevi, V Pucciarelli, F Tarabbia, D Ciprandi, G Dell'Aversana Orabona, C Dolci, F Biglioli
Facial palsy is a severe condition that may be ameliorated by facial reanimation, but there is no consensus about how to judge its success. In this study we aimed to test a new method for assessing facial movements based on 3-dimensional analysis of the facial surfaces. Eleven patients aged between 42 and 77 years who had recently been affected by facial palsy (onset between 6 and 18 months) were treated by an operation based on triple innervation: the masseteric to temporofacial nerve branch, 30% of the hypoglossal fibres to the cervicofacial nerve branch, and the contralateral facial nerve through two cross-face sural nerve grafts...
December 6, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29223604/robot-assisted-retrohepatic-inferior-vena-cava-thrombectomy-first-or-second-porta-hepatis-as-an-important-boundary-landmark
#19
Baojun Wang, Hongzhao Li, Qingbo Huang, Kan Liu, Yang Fan, Cheng Peng, Liangyou Gu, Xintao Li, Gang Guo, Rong Liu, Minggen Hu, Guodong Zhao, Hongguang Wang, Fengyong Liu, Jiang Xiong, Xu Zhang, Xin Ma
BACKGROUND: Robot-assisted retrohepatic inferior vena cava (IVC) thrombectomy (RA-R-IVCTE) has been reported only for limited series. OBJECTIVE: To describe in detail the techniques for RA-R-IVCTE with regard to the relationship of a proximal thrombus to either the first porta hepatis (FPH) or second porta hepatis (SPH). DESIGN, SETTING, AND PARTICIPANTS: From May 2013 to July 2016, 22 patients with R-IVC tumor thrombi were admitted to our hospital...
December 6, 2017: European Urology
https://www.readbyqxmd.com/read/29223545/the-bowel-function-and-quality-of-life-of-hirschsprung-disease-patients-who-have-reached-18-years-of-age-or-older-the-long-term-outcomes-after-undergoing-the-transabdominal-soave-procedure
#20
Shun Onishi, Kazuhiko Nakame, Tatsuru Kaji, Masato Kawano, Tomoe Moriguchi, Koshiro Sugita, Keisuke Yano, Mioko Nomura, Koji Yamada, Waka Yamada, Ryuta Masuya, Takafumi Kawano, Seiro Machigashira, Motoi Mukai, Satoshi Ieiri
BACKGROUND/PURPOSE: Hirschsprung disease (HD) is considered curable, but the postoperative bowel function is not always satisfactory. In this study, we evaluated the general condition, bowel function, and social performance in adults who were older than 17years of age who had undergone definitive operations in childhood. METHOD: From 1984 to 2016, 110 patients with HD underwent definitive surgery at our institute. Sixty-three patients who had undergone the transabdominal Soave procedure reached 18years of age...
December 2017: Journal of Pediatric Surgery
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