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https://www.readbyqxmd.com/read/28521228/acidified-flocculation-process-for-harvesting-of-microalgae-coagulant-reutilization-and-metal-free-microalgae-recovery
#1
Dong-Yeon Kim, Kyubock Lee, Jiye Lee, Young-Hee Lee, Jong-In Han, Ji-Yeon Park, You-Kwan Oh
Chemical flocculation is considered to be an overall low-cost and up-scalable process for harvesting of microalgae. In this study a new flocculation approach utilizing metal coagulant (Fe2(SO4)3) and sulfuric acid (H2SO4) was introduced for harvesting of Chlorella sp. KR-1, which overcome two main issues of contamination and reuse of coagulant. Reduction of pH successfully released precipitates attached to the microalgae, and the remaining acidic solution containing recovered ferric ions could be reused for harvesting up to three times with high, better-than 98% efficiencies...
May 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28505772/fame-and-obsolescence-disentangling-growth-and-aging-dynamics-of-patent-citations
#2
K W Higham, M Governale, A B Jaffe, U Zülicke
We present an analysis of citations accrued over time by patents granted by the United States Patent and Trademark Office in 1998. In contrast to previous studies, a disaggregation by technology category is performed, and exogenously caused citation-number growth is controlled for. Our approach reveals an intrinsic citation rate that clearly separates into an-in the long run, exponentially time-dependent-aging function and a completely time-independent preferential-attachment-type growth kernel. For the general case of such a separable citation rate, we obtain the time-dependent citation distribution analytically in a form that is valid for any functional form of its aging and growth parts...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28501730/larvicidal-activity-of-vegetable-oils-and-esterified-compounds-against-culex-quinquefasciatus-diptera-culicidae
#3
José A Ribeiro-Neto, Maria Eduarda A Pinto, Vanessa V Ferreira, Jacqueline D Tibúrcio, Fernando P Varotti, Dihego O Azevedo, Ezequias P Siqueira-Filho, José E Serrão, Luciana A Santos Lima, Stenio Nunes Alves
Control of Culex quinquefasciatus using chemical insecticides may result in the selection of resistant mosquito strains. Thus, the use of plant-derived products has been studied as alternative for the mosquito control. Fatty acid methyl esters (FAMEs) obtained by transesterification of vegetable oils may result in compounds with larvicidal potential against C. quinquefasciatus. However, little is known about the morphological, physiological or biochemical effects that these FAMEs may have on mosquito larvae...
May 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28501685/lipid-for-biodiesel-production-from-attached-growth-chlorella-vulgaris-biomass-cultivating-in-fluidized-bed-bioreactor-packed-with-polyurethane-foam-material
#4
Ainur-Assyakirin Mohd-Sahib, Jun-Wei Lim, Man-Kee Lam, Yoshimitsu Uemura, Mohamed Hasnain Isa, Chii-Dong Ho, Shamsul Rahman Mohamed Kutty, Chung-Yiin Wong, Siti-Suhailah Rosli
The potential to grow attached microalgae Chlorella vulgaris in fluidized bed bioreactor was materialized in this study, targeting to ease the harvesting process prior to biodiesel production. The proposed thermodynamic mechanism and physical property assessment of various support materials verified polyurethane to be suitable material favouring the spontaneous adhesion by microalgae cells. The 1-L bioreactor packed with only 2.4% (v/v) of 1.00-mL polyurethane foam cubes could achieve the highest attached growth microalgae biomass and lipid weights of 812±122 and 376±37mg, respectively, in comparison with other cube sizes...
May 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28500884/rapid-biodiesel-synthesis-from-waste-pepper-seeds-without-lipid-isolation-step
#5
Jechan Lee, Jieun Kim, Yong Sik Ok, Eilhann E Kwon
In situ transformation of lipid in waste pepper seeds into biodiesel (i.e., fatty acid methyl esters: FAMEs) via thermally-induced transmethylation on silica was mainly investigated in this study. This study reported that waste pepper seeds contained 26.9wt% of lipid and that 94.1% of the total lipid in waste pepper seeds could be converted into biodiesel without lipid extraction step for only ∼1min reaction time. This study also suggested that the optimal temperature for in situ transmethylation was identified as 390°C...
May 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28493913/pathogenic-variants-screening-in-seventeen-candidate-genes-on-2p15-for-association-with-ankylosing-spondylitis-in-a-han-chinese-population
#6
Mengmeng Wang, Lihong Xin, Guoqi Cai, Xu Zhang, Xiao Yang, Xiaona Li, Qing Xia, Li Wang, Shengqian Xu, Jianhua Xu, Zongwen Shuai, Changhai Ding, Faming Pan
OBJECTIVES: Previous studies have found the association between rs10865331 in 2p15 area and ankylosing spondylitis (AS). This study aimed to identify additional functional genetic variants in 2p15 region associated with AS susceptibility. METHODS: We used next generation sequencing (NGS) in 100 AS cases and 100 healthy controls to screen AS susceptible genetic variants, and validated these variants in 620 cases and 620 controls by using imLDRTM technique for single nucleotide polymorphism (SNP) genotyping...
2017: PloS One
https://www.readbyqxmd.com/read/28493452/suitability-of-selected-chromatographic-columns-for-analysis-of-fatty-acids-in-dialyzed-patients
#7
Magdalena Pazda, Piotr Stepnowski, Tomasz Sledzinski, Michal Chmielewski, Adriana Mika
Gas chromatography-mass spectrometry (GC-MS) is a preferred method for fatty acid (FA) analysis in biofluids from patients with metabolic diseases. Complex characteristics of FAs make their analysis particularly challenging. Selection of an appropriate chromatographic column is particularly important component of the process as it provides optimal separation and detection of possibly all FAs present in the sample. However, no accurate protocol for comparative evaluation of capillary columns for the analysis of whole serum FA profile in patients with chronic kidney disease (CKD) has been developed thus far...
May 10, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28479721/fatty-acid-profiling-and-in-vitro-antihyperglycemic-effect-of-leucas-cephalotes-roth-spreng-via-carbohydrate-hydrolyzing-enzyme-inhibition
#8
Anjali Verma, Anil Kumar, Dalip Kumar Upreti, Veena Pande, Mahesh Pal
BACKGROUND: Leucas cephalotes has been used by many tribes to treat variety of diseases and known to have many essential secondary metabolites. To the best of our knowledge, it is the first comparative analysis of total fatty acid (FA) composition and α-amylase inhibition activity of L. cephalotes. OBJECTIVE: The present study is carried out to explore the antihyperglycemic activity and FA contents of all parts of L. cephalotes. MATERIAL AND METHOD: Fruits, leaves, stems, and roots part of L...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28469387/integrative-analysis-of-gene-networks-and-their-application-to-lung-adenocarcinoma-studies
#9
Sangin Lee, Faming Liang, Ling Cai, Guanghua Xiao
The construction of gene regulatory networks (GRNs) is an essential component of biomedical research to determine disease mechanisms and identify treatment targets. Gaussian graphical models (GGMs) have been widely used for constructing GRNs by inferring conditional dependence among a set of gene expressions. In practice, GRNs obtained by the analysis of a single data set may not be reliable due to sample limitations. Therefore, it is important to integrate multiple data sets from comparable studies to improve the construction of a GRN...
2017: Cancer Informatics
https://www.readbyqxmd.com/read/28438358/potential-of-oleaginous-yeast-trichosporon-sp-for-conversion-of-sugarcane-bagasse-hydrolysate-into-biodiesel
#10
K K Brar, A K Sarma, Mohammad Aslam, Igor Polikarpov, B S Chadha
This study reports production of microbial oil from a yeast strain Trichosporon sp., (RW) isolated from decayed wood. Preliminary analysis based on fluorescence microscopy and spectroscopy of Nile red stained yeast cells showed accumulation of lipid globules. The potential of the yeast to produce lipids was evaluated on glucose, glycerol and acid hydrolysate of sugarcane bagasse, where Trichosporon sp. (RW) was found to accumulate 21.45 (59.6%), 18.41 (56%) and 10.25g/l (40.5%) of the lipids after 120h of fermentation at 30°C...
March 28, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28433903/one-step-production-of-biodiesel-from-wet-and-unbroken-microalgae-biomass-using-deep-eutectic-solvent
#11
Ying Pan, Md Asraful Alam, Zhongming Wang, Dalong Huang, Keqin Hu, Hongxuan Chen, Zhenhong Yuan
One-step and Two-step methods were studied for lipid extraction from wet and unbroken (water content is 65-67%) Chlorella sp. and Chlorococcum sp. (GN38) using deep eutectic solvent (DES) treated microalgae cells. Further we optimized the extraction process and studied on its underlying mechanism. Among all DES, Choline chloride-Acetic acid (Ch-Aa) DES treatment showed optimal conditions at the mass ratio of DES: methanol-H2SO4 (2.00%) mixture: algae biomass was 60:40:3 with reaction time was 60min, and the optimum temperature was 110°C (Chlorococcum sp...
April 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28412649/proinflammatory-effects-of-diesel-exhaust-particles-from-moderate-blend-concentrations-of-1st-and-2nd-generation-biodiesel-in-beas-2b-bronchial-epithelial-cells-the-fuelhealth-project
#12
Tonje S Skuland, Magne Refsnes, Pål Magnusson, Michał Oczkowski, Joanna Gromadzka-Ostrowska, Marcin Kruszewski, Remigiusz Mruk, Oddvar Myhre, Anna Lankoff, Johan Øvrevik
Biodiesel fuel fuels are introduced at an increasing extent as a more carbon-neutral alternative to reduce CO2-emissions, compared to conventional diesel fuel. In the present study we have investigated the impact of increasing the use of 1st generation fatty acid methyl ester (FAME) biodiesel from current 7% blend (B7) to 20% blend (B20), or by increasing the biodiesel content by adding 2nd generation hydrotreated vegetable oil (HVO) based biodiesel (SHB; Synthetic Hydrocarbon Biofuel) on toxicity of diesel exhaust particles (DEP) in an in vitro system...
April 5, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28410443/molecular-characterization-of-volatiles-and-petrochemical-base-oils-by-photo-ionization-gc%C3%A3-gc-tof-ms
#13
Anupam Giri, Marion Coutriade, Amandine Racaud, Koji Okuda, John Dane, Robert B Cody, Jean-François Focant
The characterization of organic mixtures by comprehensive two-dimensional gas chromatography (GC×GC) coupled to electron impact (EI) ionization time-of-flight mass spectrometry (TOF-MS) allows the detection of thousands of compounds. However, owing to the exhaustive fragmentation following EI ionization, despite the use of mass spectral libraries, a majority of the compounds remains unidentified because of the lack of parent ion preservation. Thus, soft-ionization energies leading to organic compounds being ionized with limited or no fragmentation, retaining the molecular ion, has been of interest for many years...
April 26, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28366691/improved-biomass-and-lipid-production-in-synechocystis-sp-nn-using-industrial-wastes-and-nano-catalyst-coupled-transesterification-for-biodiesel-production
#14
Kalimuthu Jawaharraj, Rathinasamy Karpagam, Balasubramaniem Ashokkumar, Shanmugam Kathiresan, Innasi Muthu Ganesh Moorthy, Muthu Arumugam, Perumal Varalakshmi
In this study, the improved biomass (1.6 folds) and lipid (1.3 folds) productivities in Synechocystis sp. NN using agro-industrial wastes supplementation through hybrid response surface methodology-genetic algorithm (RSM-GA) for cost-effective methodologies for biodiesel production was achieved. Besides, efficient harvesting in Synechocystis sp. NN was achieved by electroflocculation (flocculation efficiency 97.8±1.2%) in 10min when compared to other methods. Furthermore, different pretreatment methods were employed for lipid extraction and maximum lipid content of 19...
March 18, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28335719/enhanced-construction-of-gene-regulatory-networks-using-hub-gene-information
#15
Donghyeon Yu, Johan Lim, Xinlei Wang, Faming Liang, Guanghua Xiao
BACKGROUND: Gene regulatory networks reveal how genes work together to carry out their biological functions. Reconstructions of gene networks from gene expression data greatly facilitate our understanding of underlying biological mechanisms and provide new opportunities for biomarker and drug discoveries. In gene networks, a gene that has many interactions with other genes is called a hub gene, which usually plays an essential role in gene regulation and biological processes. In this study, we developed a method for reconstructing gene networks using a partial correlation-based approach that incorporates prior information about hub genes...
March 23, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28303757/evaluation-of-microalgae-production-coupled-with-wastewater-treatment
#16
Davide De Francisci, Yixi Su, Arvo Iital, Irini Angelidaki
In the present study the feasibility of microalgae production coupled with wastewater treatment was assessed. Continuous cultivation of Chlorella sorokiniana with wastewater was tested in lab-scale flat panel photobioreactors. Biomass productivity was determined for four dilution rates (4.32 d(-1), 3.6 d(-1), 1.8 d(-1) and 0.72 d(-1)). The productivity peak was 1.524 g l(-1)d(-1) at the dilution rate of 2.41 d(-1). Nitrogen and phosphorus removals were found to be inversely proportional to dilution rates, while COD removal was found to be 50% at all the tested conditions...
March 17, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28283896/fluocinolone-acetonide-intravitreal-implant-0-19%C3%A2-mg-iluvien-%C3%A2-a-review-in-diabetic-macular-edema
#17
REVIEW
Yahiya Y Syed
Fluocinolone acetonide intravitreal implant 0.19 mg (ILUVIEN(®)) is a nonbiodegradable, injectable, corticosteroid implant that is approved in several countries, including the USA, for the treatment of diabetic macular edema (DME). ILUVIEN(®) releases fluocinolone acetonide at an initial rate of 0.25 µg/day (average rate 0.2 µg/day) and lasts 36 months. In the two pooled pivotal FAME trials in patients with DME previously treated with macular laser photocoagulation, fluocinolone acetonide intravitreal implant 0...
April 2017: Drugs
https://www.readbyqxmd.com/read/28279384/can-functional-testing-for-ischemia-and-viability-guide-revascularization
#18
REVIEW
Lisa M Mielniczuk, Gabor G Toth, Joe X Xie, Bernard De Bruyne, Leslee J Shaw, Rob S Beanlands
Cardiac imaging procedures are a cornerstone of the diagnosis and management of patients with cardiac disease. The optimal management of the patient with stable ischemic heart disease or ischemic heart failure often rests on the totality of symptom burden, patient risk, and disease severity, whether assessed anatomically or functionally. Recent trials have demonstrated the power of flow measurements to direct revascularization as well as the strengths and limitations of ischemia and viability/hibernation imaging as markers of risk to direct interventions...
March 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28256295/kinetic-and-molecular-analyses-reveal-isoprene-degradation-potential-of-methylobacterium-sp
#19
Navnita Srivastva, P Vishwakarma, Y Bhardwaj, A Singh, K Manjunath, Suresh K Dubey
Efforts were made to isolate and characterize bacteria capable of growing on methane and organic compounds, and to achieve the simultaneous degradation of more than one pollutant. Among the methanotrophs, species of Methylobacterium was able to catabolize a variety of hydrocarbons, including the branched-chain alkenes. Therefore, laboratory incubations experiments were carried out in batch mode to assess the potential of Methylobacterium sp. PV1 for degrading isoprene, the low-molecular-weight alkene, the most abundant non-methane volatile hydrocarbon present in the environment...
February 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28254712/evaluation-of-bayesian-approaches-to-identify-ddt-source-contributions-to-soils-in-southeast-china
#20
Faming Zeng, Dan Yang, Xinli Xing, Shihua Qi
Dicofol application may be an important source to elevate the dichlorodiphenyltrichloroethane (DDT) residues to soils in Fujian, Southeast China, after the technical DDT was banned, which left DDT residues from the historical application. The DDT residues varied geographically, corresponding to the varied potential sources of DDT. In this study, a novel approach based on the Bayesian method (BM) was developed to identify the source contributions of DDT to soils, composed with both historical DDT and dicofol...
June 2017: Chemosphere
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