keyword
MENU ▼
Read by QxMD icon Read
search

Ammonia

keyword
https://www.readbyqxmd.com/read/28945028/-effects-of-methyl-jasmonate-on-accumulation-of-furanocoumarins-in-changium-smyrnioides-and-its-suspension-cells
#1
Jing Cai, Yun Ma, Jian-Wei Chen, Xiang Li, Ping Zhou
Changium smyrnioides is an endangered and endemic medicinal herb in China which contains rich furanocoumarins. Bergaptol, bergapten and xanthotoxin are natural furanocoumarins in Ch. smyrnioides, among which bergaptol is mainly contained in in vitro cultures while the latter ones distribute in all organs and cultures of the plant. In this study, methyl jasmonate was used to elicit furanocoumarins in both cultivated plant and suspension cells. The accumulations of biomass and 3 furanocoumarins as well as the activity of cell, phenylalanine ammonia-lyase and antioxidase were detected...
January 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28944530/effect-of-changing-forage-on-the-dynamic-variation-in-rumen-fermentation-in-sheep
#2
Xiao Xie, Jia-Kun Wang, Leluo Guan, Jian-Xin Liu
To better understand rumen adaptation during dietary transitions between high- and low-quality forages, 10 rumen-cannulated Hu sheep were randomly allocated to two dietary treatments (five sheep each) with the same concentrate-to-forage ratio and concentration mixture, but different forage sequences: (i) alfalfa hay (AH) to corn stover (CS) and back to AH; and (ii) CS to AH and back to CS. A significant decrease in the rumen microbial protein concentration was observed on day 6 after dietary transition whether the transition was from AH to CS or from CS to AH, and this was accompanied by an increase in the ammonia nitrogen concentration as well as a decrease in the total volatile fatty acids concentration and pH...
September 25, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28942939/relation-of-coronary-flow-reserve-to-other-findings-on-positron-emission-tomography-myocardial-perfusion-imaging-and-left-heart-catheterization-in-patients-with-end-stage-renal-disease-being-evaluated-for-kidney-transplant
#3
Yehuda Paz, Rachelle Morgenstern, Richard Weinberg, Mariana Chiles, Navdeep Bhatti, Ziad Ali, Sumit Mohan, Sabahat Bokhari
Cardiovascular disease is the leading cause of death in patients with end-stage renal disease (ESRD) and often goes undetected. Abnormal coronary flow reserve (CFR), which predicts increased risk of cardiac death, may be present in patients with ESRD without other evidence of coronary artery disease (CAD). We prospectively studied 131 patients who had rest and dipyridamole pharmacologic stress N(13)-ammonia positron emission tomography myocardial perfusion imaging (PET MPI) for kidney transplant evaluation...
August 30, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28941666/enhanced-nitrogen-removal-using-solid-carbon-source-in-constructed-wetland-with-limited-aeration
#4
Zhongchen Yang, Luhua Yang, Caijie Wei, Weizhong Wu, Xufei Zhao, Ting Lu
In this study, the performances of nitrogen removal in constructed wetlands using solid carbon source with limited aeration were investigated. The blends of poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and polyacetic acid (PLA) were used as the carbon source and biofilm support. The performances of nitrogen removal, microbial abundance and microbial community structure in the biofilm attached on PHBV/PLA were investigated. Higher ammonia removal efficiency (91.00%) and total nitrogen removal efficiency (97...
August 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28941230/effects-of-rumen-protected-pantothenate-supplementation-on-lactation-performance-ruminal-fermentation-nutrient-digestion-and-blood-metabolites-in-dairy-cows
#5
Wang Cong, Liu Qiang, Li He Qiong, Wu Xiao Xu, Gang Guo, Wen Jie Huo, Pei Cai Xia, Zhang Yan Li, Zhang Shuan Lin
BACKGROUND: Lactation performance of dairy cow has considerably increased with animal breeding and management improvement in recent years. Ruminal net synthesized pantothenic acid is insufficient to meet the requirement of high producing dairy cows. The objective was to investigate the effects of rumen-protected pantothenate (RPP) on lactation performance, ruminal fermentation, nutrient digestion and blood metabolites in dairy cows. RESULTS: Dry matter (DM) intake tended to increase, whereas milk yields, milk fat percentage and yield, body condition score (BCS) changes and net energy output except for maintance increased linearly with increasing RPP supplementation...
September 23, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28940810/-snbi3-5-a-carbonate-analogue-formed-in-solution-and-comprising-exclusively-metal-atoms
#6
Thomas Friedrich Fässler, Kerstin Mayer, Jasmin Dums, Wilhelm Klein
The new [SnBi3]5- polyanion is obtained by the reaction of K3Bi2 with K4Sn9 or K12Sn17 in liquid ammonia. The anion is iso(valence)electronic with and structurally analogous to the carbonate ion. Despite the high negative charge of the anion, the Sn-Bi bond lengths range between single and double bonds. Quantum-chemical calculations at a DFT-PBE0/def2-TZVPP/COSMO level of theory reveal that the partial double bond character between the heavy main group atoms Bi and Sn originates from a delocalized π-electronic system...
September 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28940509/morphological-and-transcript-changes-in-the-biosynthesis-of-lignin-in-oil-palm-elaeis-guineensis-during-ganoderma-boninense-infections-in-vitro
#7
Goh Kar Mun, Matthew Dickinson, Christina V Supramaniam
Lignification of the plant cell wall could serve as the first line of defence against pathogen attack, but the molecular mechanisms of virulence and disease between oil palm and Ganoderma boninense is poorly understood. This study presents the biochemical, histochemical, enzymology and gene expression evidences of enhanced lignin biosynthesis in young oil palm as a response to G. boninense (GBLS strain). Comparative studies with control (T1), wounded (T2) and infected (T3) oil palm plantlets showed significant accumulation of total lignin content and monolignol derivatives (syringaldehyde and vanillin)...
September 20, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28940131/nitrogen-nutrition-in-cotton-and-control-strategies-for-greenhouse-gas-emissions-a-review
#8
Aziz Khan, Daniel Kean Yuen Tan, Fazal Munsif, Muhammad Zahir Afridi, Farooq Shah, Fan Wei, Shah Fahad, Ruiyang Zhou
Cotton (Gossypium hirustum L.) is grown globally as a major source of natural fiber. Nitrogen (N) management is cumbersome in cotton production systems; it has more impacts on yield, maturity, and lint quality of a cotton crop than other primary plant nutrient. Application and production of N fertilizers consume large amounts of energy, and excess application can cause environmental concerns, i.e., nitrate in ground water, and the production of nitrous oxide a highly potent greenhouse gas (GHG) to the atmosphere, which is a global concern...
September 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28939132/peak-hyperammonemia-and-atypical-acute-liver-failure-the-eruption-of-an-urea-cycle-disorder-during-hyperemesis-gravidarum
#9
REVIEW
Nicolas Weiss, Fanny Mochel, Marika Rudler, Sophie Demeret, Pascal Lebray, Filomena Conti, Damien Galanaud, Chris Ottolenghi, Jean-Paul Bonnefont, Marc Dommergues, Jacques Bernuau, Dominique Thabut
BACKGROUND: Inborn urea cycle deficiencies are under-recognized metabolic causes of hyperammonaemia in adults. METHODS: A 28-year-old primigravida, 7-week pregnant woman affected by hyperemesis gravidarum developed acute liver injury and then acute liver failure (ALF) in less than 48 hours. RESULTS: Because the patient developed atypical features, especially mildly elevated serum transaminases contrasting with very high blood ammonia levels (281 μmol/l), concomitant with normal serum creatinine, an inborn error of metabolism was suspected...
September 19, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28938816/solvation-structure-and-dynamics-of-ag-in-aqueous-ammonia-solutions-a-molecular-simulation-study
#10
Stefano Sansotta, Dirk Zahn
We present an ab initio-based force-field for silver ion interactions with water and ammonia. Compared to quantum calculations, our model allows for rather large-scale molecular dynamics simulations of silver solutions of aqueous ammonia. For a series of NH3:H2O ratios ranging from 1 to 20 mol. %, Ag(+) ions were mainly found as octahedral [Ag(NH3)x(H2O)]6-x(+) coordination complexes with preferential values of x ranging from 0 to 3. In the first coordination structure, water ↔ ammonia exchanges occur within a 1-3 ps time scale and, depending on the NH3 concentration, imply significant fluctuations of x covering the whole range from 0 to 6...
September 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28936841/-determination-of-six-alkaloids-in-six-types-of-coptidis-rhizoma-pieces-by-rp-hplc-and-spectrum-effect-relationships-with-anti-diabetes-pharmacodynamics-data
#11
Xian-Rong Lai, Bang-Hua Zhou, Ming-Sheng Du, Hai-Jie Zheng, Zhi-Peng Geng, Jia-Chuan Li, Xian-Li Meng, Yi Zhang, Jing Zhang
To establish a method for determining the contents of six alkaloids (jatrorrhizine hydrochloride, columbamine hydrochloride, epiberberine hydrochloride, coptisine hydrochloride, palmatine hydrochloride, berberine hydrochloride) in six types of Coptidis Rhizoma pieces (crude pieces, ginger juice stir-fried pieces, vinegar stir-fried pieces, wine steamed pieces, wine stir-fried pieces, evodiae juice stir-fried pieces) by RP-HPLC, and explore the relationship with the curative effect of traditional Chinese medicine (TCM) and pharmacodynamics results...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28936531/knudsen-cell-studies-of-the-uptake-of-gaseous-ammonia-and-amines-onto-c3-c7-solid-dicarboxylic-acids
#12
Michelle C Fairhurst, Michael J Ezell, Barbara J Finlayson-Pitts
While atmospheric particles affect health, visibility and climate, the details governing their formation and growth are poorly understood on a molecular level. A simple model system for understanding the interactions between the gas and particle phases is the reaction of bases with acids, both of which are common constituents of atmospheric particles. In the present study, uptake coefficients for the reactions of gas phase ammonia, methylamine, ethylamine, dimethylamine and trimethylamine with a series of solid dicarboxylic acids (diacids) were measured at 296 ± 1 K using a Knudsen cell interfaced to a quadrupole mass spectrometer...
September 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28935929/a-high-selective-methanol-gas-sensor-based-on-molecular-imprinted-ag-lafeo3-fibers
#13
Qian Rong, Yumin Zhang, Chao Wang, Zhongqi Zhu, Jin Zhang, Qingju Liu
Ag-LaFeO3 molecularly imprinted polymers (ALMIPs) were fabricated, which provided special recognition sites to methanol. Then ALMIPs fiber 1, fiber 2 and fiber 3 were prepared using filter paper, silk and carbon fibers template, respectively. Based on the observation of X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and Nitrogen adsorption surface area analyzer (BET), the structure, morphology and surface area of the fibers were characterized. The ALMIPs fibers (fiber 1, fiber 2 and fiber 3) show excellent selectivity and good response to methanol...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935864/high-levels-of-ammonia-do-not-raise-fine-particle-ph-sufficiently-to-yield-nitrogen-oxide-dominated-sulfate-production
#14
Hongyu Guo, Rodney J Weber, Athanasios Nenes
High levels of ammonia (NH3) have been suggested to elevate ambient particle pH levels to near neutral acidity (pH = 7), a condition that promotes rapid SO2 oxidation by NO2 to form aerosol sulfate concentration consistent with "London fog" levels. This postulation is tested using aerosol data from representative sites around the world to conduct a thorough thermodynamic analysis of aerosol pH and its sensitivity to NH3 levels. We find that particle pH, regardless of ammonia levels, is always acidic even for the unusually high NH3 levels found in Beijing (pH = 4...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935769/mof-derived-cobalt-nanoparticles-catalyze-a-general-synthesis-of-amines
#15
Rajenahally V Jagadeesh, Kathiravan Murugesan, Ahmad S Alshammari, Helfried Neumann, Marga-Martina Pohl, Jörg Radnik, Matthias Beller
The development of base metal catalysts for the synthesis of pharmaceutically relevant compounds remains an important goal of chemical research. Here, we report that cobalt nanoparticles encapsulated by a graphitic shell are broadly effective reductive amination catalysts. Their convenient and practical preparation entailed template assembly of cobalt-diamine-dicarboxylic acid metal organic frameworks on carbon and subsequent pyrolysis under inert atmosphere. The resulting stable and reusable catalysts were active for synthesis of primary, secondary, tertiary and N-methylamines (>140 examples)...
September 21, 2017: Science
https://www.readbyqxmd.com/read/28935597/ammonia-exposure-alters-the-expression-of-immune-related-and-antioxidant-enzymes-related-genes-and-the-gut-microbial-community-of-crucian-carp-carassius-auratus
#16
Xiao-Zhou Qi, Ming-Yang Xue, Shi-Bo Yang, Ji-Wei Zha, Gao-Xue Wang, Fei Ling
Chronic exposure of ammonia in fish can affect the activities of antioxidant enzymes but few studies investigate the influence of ammonia exposure on the expression of immune-related and antioxidant enzymes-related genes. Also, there is no study demonstrates the effect of ammonia exposure on gut microbial community of fish. In this study, crucian carp (Carassius auratus) were exposed to the ammonia concentrations, 0 (control), 10 mg L(-1) (low) or 50 mg L(-1) (high) for consecutive 30 days at 25 ± 1 °C temperature, respectively, and after that, the fish from all exposure groups were maintained in control conditions for another 15 days...
September 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28934709/toxicity-of-ammonia-cadmium-and-nitrobenzene-to-four-local-fishes-in-the-liao-river-china-and-the-derivation-of-site-specific-water-quality-criteria
#17
Zhihong Liu, Xiaojun Li, Peidong Tai, Lizong Sun, Honghong Yuan, Xiaonan Yang
Water quality criteria (WQC) are considered to be an effective management tool for protecting aquatic environments. To derive site-specific WQC for an area, local data based on local species are essential to improve the applicability of WQC derived. Due to the paucity of local fish data available for the development of site-specific WQC for the Liao River, China, four local and widespread fishes (Pseudorasbora parva, Abbottina liaoningensis, Ctenogobius giurinus, and Misgurnus anguillicaudatus) were chosen to test their sensitivities to ammonia, cadmium and nitrobenzene...
September 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28934707/investigating-sources-and-sinks-of-n2o-expression-from-freshwater-microbial-communities-in-urban-watershed-sediments
#18
Christopher Weisener, Jumin Lee, Subba Rao Chaganti, Thomas Reid, Nick Falk, Ken Drouillard
Wastewater treatment plants (WWTPs) serve as point-source inputs for a variety of nutrients often dominated by nitrogenous compounds as a result of anthropogenic influence. These effluents can impact biogeochemical cycles in freshwater estuaries, influencing microbial communities in both the water and sediment compartments. To assess the impact of point source nutrients, a transect of sediment and pore water samples were collected from 4 locations in the Little River Sub-watershed including locations above and below the Little River Pollution Control Plant (LRPCP)...
September 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28934589/low-dietary-protein-and-high-carbohydrate-infant-formula-affects-the-microbial-ecology-of-the-large-intestine-in-neonatal-rats
#19
Wenguang Fan, Haiwei Ren, Yingying Cao, Yonggang Wang, Guicheng Huo
The aim of this study was to investigate the effects of a low dietary protein and high carbohydrate infant formula on the large intestine of neonatal rats. A total of 24 neonatal SD rats (14d old) were randomly assigned to the low-protein, high-carbohydrate infant formula-fed group (IF group) and a human breast milk-fed group (HF group). After 7 days, we selected 6 rats at random from each group to study. No significantly different microbial colonization patterns were observed in the two groups at the phylum level...
September 21, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28934549/selective-electrodeposition-of-tantalum-v-oxide-electrodes
#20
Hamed Hajibabaei, Thomas W Hamann
Thin films of TaOxHy were cathodically electrodeposited from an aqueous solution containing Ta-IPA precursor and KNO3 as a sacrificial agent. It was shown that the deposition resulted from a precipitation reaction triggered by the local change of pH at the surface of working electrode. Combined structural and compositional analysis revealed that during the electrodeposition the oxidation state of tantalum remained constant, Ta(V). The as-deposited films are mesoporous amorphous tantalum oxide hydrate films, which can be converted to either pure Ta2O5 or Ta3N5 by high-temperature annealing in either air (or Ar) or ammonia, respectively...
September 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
keyword
keyword
2582
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"