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https://www.readbyqxmd.com/read/28813692/enhancing-cell-growth-and-lutein-productivity-of-desmodesmus-sp-f51-by-optimal-utilization-of-inorganic-carbon-sources-and-ammonium-salt
#1
Youping Xie, Xurui Zhao, Jianfeng Chen, Xuqiu Yang, Shih-Hsin Ho, Baobei Wang, Jo-Shu Chang, Ying Shen
The type and concentration of inorganic carbon and nitrogen sources were manipulated to improve cell growth and lutein productivity of Desmodesmus sp. F51. Using nitrate as nitrogen source, the better cell growth and lutein accumulation were obtained under 2.5% CO2 supply when compared to the addition of NaHCO3 or Na2CO3. To solve the pH variation problem of ammonium consumption, the strategy of using dual carbon sources (NaHCO3 and CO2) was explored. A lower bicarbonate-C: ammonium-N ratio led to a lower culture pH as well as lower lutein productivity, but significantly enhanced the auto-flocculation efficiency of the microalgal cells...
August 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28813595/activation-of-a-nickel-based-oer-catalyst-on-a-hematite-photoanode-via-incorporation-of-cerium-for-photoelectrochemical-water-oxidation
#2
Hyungseob Lim, Jae Young Kim, Edward J Evans, Amritesh Rai, Jun-Hyuk Kim, Bryan R Wygant, Charles Buddie Mullins
There has been debate on whether Ni(OH)2 is truly catalytically active for the photo/-electrocatalytic oxygen evolution reaction. In this report, we have synthesized a Ni(OH)2 co-catalyst on a hematite photoanode and showed that, as has been proposed in other studies, the current density varies as a function of scan rate, which arise due to a photo-induced capacitive charging effect. We have discovered that this photo-induced charging of Ni2+/3+ can be overcome by mixing cerium nitrate into the Ni precursor solution...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28813142/atomic-force-microscopy-infrared-spectroscopy-of-individual-atmospheric-aerosol-particles-sub-diffraction-limit-vibrational-spectroscopy-and-morphological-analysis
#3
Amy Lynne Bondy, Rachel M Kirpes, Rachel Leah Merzel, Kerri A Pratt, Mark M Banaszak Holl, Andrew P Ault
Chemical analysis of atmospheric aerosols is an analytical challenge, as aerosol particles are complex chemical mixtures that can contain hundreds to thousands of species in attoliter volumes at the most abundant sizes in the atmosphere (~100 nm). These particles have global impacts on climate and health, but there are few methods available that combine imaging and the detailed molecular information from vibrational spectroscopy for individual particles <500 nm. Herein, we show the first application of atomic force microscopy with infrared spectroscopy (AFM-IR) to detect trace organic and inorganic species and probe intraparticle chemical variation in individual particles down to 150 nm...
August 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28812744/benzene-centred-tripodal-diglycolamides-for-the-sequestration-of-trivalent-actinides-metal-ion-extraction-and-luminescence-spectroscopic-investigations-in-a-room-temperature-ionic-liquid
#4
Seraj Ahmad Ansari, Prasanta Kumar Mohapatra, Andrea Leoncini, Jurriaan Huskens, Willem Verboom
Three benzene-centred tripodal diglycolamide (Bz-T-DGA) ligands, where the diglycolamide (DGA) moieties are attached to a central benzene ring through ethylene spacers (LI), amide groups (LII) or ether linkages (LIII), were evaluated for their extraction behaviour towards trivalent actinide and lanthanide ions in a room temperature ionic liquid (RTIL), viz. 1-butyl-3-methylimidazolium bis(trifluoromethane)sulfonimide ([C4mim][Tf2N]). The extraction behaviour of these ligands in [C4mim][Tf2N] medium was compared with that obtained in the molecular solvent n-dodecane showing an opposite selectivity of LIII > LII > LIvs...
August 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28810505/denitrification-of-the-anaerobic-membrane-bioreactor-anmbr-effluent-with-alternative-electron-donors-in-domestic-wastewater-treatment
#5
L Pelaz, A Gómez, G Garralón, A Letona, M Fdz-Polanco
A fixed film bioreactor for the denitrification of the effluent from an anaerobic membrane bioreactor (AnMBR) treating domestic wastewater was designed, built and investigated. After anaerobic treatment, the wastewater usually has a low C/N ratio (∼1.3), and a remaining chemical oxygen demand of around 117mg O2/L, which is not enough to make conventional heterotrophic denitrification possible. That effluent also holds methane and sulfide dissolved and oversaturated after leaving the AnMBR. This paper demonstrates the feasibility of using these reduced compounds as electron donors in order to remove 80mg NOx(-)-N/L at 18°C and 2h of hydraulic retention time...
July 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810293/-comparative-study-of-three-different-decalcifying-solutions-in-bone-metastasis-specimens-with-breast-cancer
#6
H Y Wu, T Wang, K L Chen, Z W Fan, X H Pu, B Zhang, X S Fan, F Q Meng
Objective: To investigate the optimal strategy for immunohistochemical (IHC) staining in bone metastasis specimens from breast cancer. Methods: Twenty-eight bone metastases specimens from breast cancers were divided into three groups and subjected to different decalcifying agents (group A-10% nitrate, group B-EDTA decalcification, and group C-imported decalcifying solution RapidCal). The effects of those on HE and IHC staining for Ki-67, ER, PR, GATA3, RANK, RANKL, HER2 and HER2 FISH results were assessed. Results: There were no significant differences among three groups in HE morphology and IHC staining...
August 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28810205/chemical-composition-source-and-process-of-urban-aerosols-during-winter-haze-formation-in-northeast-china
#7
Jian Zhang, Lei Liu, Yuanyuan Wang, Yong Ren, Xin Wang, Zongbo Shi, Daizhou Zhang, Huizheng Che, Hujia Zhao, Yanfei Liu, Hongya Niu, Jianmin Chen, Xiaoye Zhang, A P Lingaswamy, Zifa Wang, Weijun Li
The characteristics of aerosol particles have been poorly evaluated even though haze episodes frequently occur in winter in Northeast China. OC/EC analysis, ion chromatography, and transmission electron microscopy (TEM) were used to investigate the organic carbon (OC) and elemental carbon (EC), and soluble ions in PM2.5 and the mixing state of individual particles during a severe wintertime haze episode in Northeast China. The organic matter (OM), NH4(+), SO4(2-), and NO3(-) concentrations in PM2.5 were 89...
August 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28808945/erratum-to-vasodilator-therapy-nitrates-and-nicorandil
#8
Jason M Tarkin, Juan Carlos Kaski
No abstract text is available yet for this article.
August 14, 2017: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/28808381/characterization-antibacterial-and-antioxidant-properties-of-silver-nanoparticles-synthesized-from-aqueous-extracts-of-allium-sativum-zingiber-officinale-and-capsicum-frutescens
#9
Gloria Aderonke Otunola, Anthony Jide Afolayan, Emmanuel Olusegun Ajayi, Samuel Wale Odeyemi
BACKGROUND: Herbal drug delivery is limited by poor solubility and bioavailability which can be overcome with suitable nanomaterials that will enhance their pharmacokinetics and performance. OBJECTIVE: This study aimed to analyze the synthesis, characterization, and biological activities of silver nanoparticles (AgNPs) from three spices. MATERIALS AND METHODS: AgNPs were prepared using 0.1 M silver nitrate and aqueous extracts of Allium sativum L...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28807472/a-survey-of-domestic-wells-and-pit-latrines-in-rural-settlements-of-mali-implications-of-on-site-sanitation-on-the-quality-of-water-supplies
#10
P Martínez-Santos, M Martín-Loeches, N García-Castro, D Solera, S Díaz-Alcaide, E Montero, J García-Rincón
On-site sanitation is generally advocated as a means to eradicate the health hazards associated with open defecation. While this has provided a welcome upgrade to the livelihoods of millions of people in low-income countries, improved sanitation facilities are increasingly becoming a threat to domestic groundwater-based supplies. Within this context, a survey of pit latrines, domestic wells and improved water sources was carried out in a large rural village of southern Mali. All households were surveyed for water, sanitation and hygiene habits...
August 4, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28807084/linseed-plus-nitrate-in-the-diet-for-fattening-bulls-effects-on-methane-emission-animal-health-and-residues-in-offal
#11
M Doreau, M Arbre, M Popova, Y Rochette, C Martin
The combination of linseed and nitrate is known to decrease enteric methane emission in dairy cows but few studies have been carried out in fattening cattle for animal liveweight gain, enteric methane emission, animal health and presence of residues in beef products. To address this gap, 16 young bulls received a control (C) diet between weaning at 9 months and 14 months, then were split into two groups of eight balanced on feed intake, BW gain and methane emission to receive either the C diet or a diet moderately supplemented with extruded linseed and calcium nitrate (LN) for 2 months before being slaughtered...
August 15, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28806727/formation-of-friable-embryogenic-callus-in-cassava-is-enhanced-under-conditions-of-reduced-nitrate-potassium-and-phosphate
#12
Yoshinori Utsumi, Chikako Utsumi, Maho Tanaka, Vu The Ha, Akihiro Matsui, Satoshi Takahashi, Motoaki Seki
Agrobacterium-mediated transformation is an important research tool for the genetic improvement of cassava. The induction of friable embryogenic callus (FEC) is considered as a key step in cassava transformation. In the present study, the media composition was optimized for enhancing the FEC induction, and the effect of the optimized medium on gene expression was evaluated. In relative comparison to MS medium, results demonstrated that using a medium with reducing nutrition (a 10-fold less concentration of nitrogen, potassium, and phosphate), the increased amount of vitamin B1 (10 mg/L) and the use of picrolam led to reprogram non-FEC to FEC...
2017: PloS One
https://www.readbyqxmd.com/read/28805918/effects-of-encapsulated-nitrate-on-growth-performance-carcass-characteristics-nitrate-residues-in-tissues-and-enteric-methane-emissions-in-beef-steers-finishing-phase
#13
C Lee, R C Araujo, K M Koenig, K A Beauchemin
A finishing feedlot study was conducted with beef steers to determine effects of encapsulated nitrate (EN) on growth performance, carcass characteristics, methane production, and nitrate (NO) residues in tissues. The 132 crossbred steers were backgrounded in a feedlot for 91 d and transitioned for 28 days to the high-concentrate diets evaluated in the present study, maintaining the treatment and pen assignments designated at the start of the backgrounding period. The steers were initially assigned to 22 pens (6 animals per pen) in a randomized complete block design with BW (18 pens) and animals designated for methane measurement (4 pens) as blocking factors...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805908/effects-of-encapsulated-nitrate-on-growth-performance-nitrate-toxicity-and-enteric-methane-emissions-in-beef-steers-backgrounding-phase
#14
C Lee, R C Araujo, K M Koenig, K A Beauchemin
A long-term experiment was conducted to examine the effects of feeding encapsulated nitrate (EN) on growth, enteric methane production, and nitrate (NO) toxicity in beef cattle fed a backgrounding diet. A total of 108 crossbred steers (292 ± 18 kg) were blocked by BW and randomly assigned to 18 pens. The pens (experimental unit; 6 animals per pen) received 3 dietary treatments: Control, a backgrounding diet supplemented with urea; 1.25% EN, control diet supplemented with 1.25% encapsulated calcium ammonium NO (i...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805901/effect-of-stocking-density-on-performance-diet-selection-total-tract-digestion-and-nitrogen-balance-among-heifers-grazing-cool-season-annual-forages
#15
B R Brunsvig, A J Smart, E A Bailey, C L Wright, E E Grings, D W Brake
Grazing annual cool-season forages after oat grain harvest in South Dakota may allow an opportunity to increase efficient use of tillable land. However, data are limited regarding effects of stocking density on diet selection, nutrient digestion, performance, and N retention by cattle grazing annual cool-season forage. Heifers were blocked by initial BW (261 ± 11.7 kg) and randomly assigned to 1 of 12 paddocks (1.1 ha) to graze a mixture of grass and brassica for 48 d. Each paddock contained 3, 4, or 5 heifers to achieve 4 replicates of each stocking density treatment...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805381/compressibility-anisotropy-and-electronic-properties-of-oxyanionic-hydrates
#16
Dmitry Vasilievich Korabel'nikov, Yuriy N Zhuravlev
The structural and electronic properties of oxyanionic crystalline hydrates, LiNO3•3H2O, LiClO4•3H2O and NaClO4•H2O, have been studied using density functional theory including van der Waals interactions. It is established that the linear compressibility of lithium perchlorate trihydrate is anisotropic (a < c) and positive, while lithium nitrate trihydrate and sodium perchlorate monohydrate demonstrate negative linear compressibility along the b and c- axes, respectively. Deformation of Ow-H•••O hydrogen bonding motifs is correlated with the negative linear compressibility...
August 14, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28805340/scalable-dry-production-of-superior-3d-net-like-feox-c-composite-anode-material-for-lithium-ion-battery
#17
Min Li, Haoran Du, Long Kuai, Kuangfu Huang, Yuanyuan Xia, Baoyou Geng
Carbon-based transition metal oxides are considered as an appropriate anode material candidate for lithium ion batteries. Herein, a simple and scalable dry-production method is developed to produce carbon-encapsulated 3D net-like FeOx/C material. The process simply associates with pyrolysis of solid carbon source of filter paper with adsorbed ferrite nitrate. The carbon derived from filter paper induces a carbothermal reduction to form metallic Fe, the adding carbon and metal Fe increase the conductivity of this material...
August 14, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28804480/microbial-community-structure-and-the-persistence-of-cyanobacterial-populations-in-salt-crusts-of-the-hyperarid-atacama-desert-from-genome-resolved-metagenomics
#18
Kari M Finstad, Alexander J Probst, Brian C Thomas, Gary L Andersen, Cecilia Demergasso, Alex Echeverría, Ronald G Amundson, Jillian F Banfield
Although once thought to be devoid of biology, recent studies have identified salt deposits as oases for life in the hyperarid Atacama Desert. To examine spatial patterns of microbial species and key nutrient sources, we genomically characterized 26 salt crusts from three sites along a fog gradient. The communities are dominated by a large variety of Halobacteriales and Bacteroidetes, plus a few algal and Cyanobacterial species. CRISPR locus analysis suggests the distribution of a single Cyanobacterial population among all sites...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28803424/nitrate-pollution-in-the-warta-river-poland-between-1958-and-2016-trends-and-causes
#19
Józef Górski, Krzysztof Dragon, Piotr Michał Jan Kaczmarek
The article presents analyses of long-term water quality data from the Warta River between 1958 and 2016. A clear increasing trend in nitrate concentrations was observed from 1958 to the early 1990s. This trend was mainly related to the increasing use of fertilizers in Poland in this period. Then, after the early 1990s, a slow decreasing trend related to improvements in water and sewage management and more rational fertilizer use was observed after political and economic changes in Poland. The influence of long-term hydrological droughts on nitrate concentrations was also investigated...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803324/decreased-serum-l-arginine-and-l-citrulline-levels-in-major-depression
#20
S Hess, G Baker, G Gyenes, R Tsuyuki, S Newman, Jean-Michel Le Melledo
RATIONALE: It has been suggested that endothelial dysfunction caused by a decreased endothelial production of nitric oxide (NO) may contribute to the consistently observed increased risk of developing cardiovascular disease (CVD) in physically healthy patients suffering from major depression (MD). NO is a gas synthesized from Larginine (a conditionally essential amino acid) and oxygen by endothelial nitric oxide synthase (eNOS). The end products of NO production include both NO and L-citrulline...
August 13, 2017: Psychopharmacology
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