Ammonium Phosphate Dibasic ACS Crystals

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• Appl Microbiol Biotechnol. 2011 Mar Effects of nitrogen catabolite repression and di-ammonium phosphate addition during wine fermentation by a commercial strain of S. cerevisiae.

  Two deletion mutants expected to be defective in nitrogen catabolite repression (NCR) were constructed in a commercial wine yeast background M2: a ure2 mutant and a dal80 gzf3 double mutant. Wild-type and both mutant strains were fermented in Sauvignon Blanc grape juice with and without addition of di-ammonium phosphate (DAP). The dal80 gzf3 double mutant… Read Abstract

• J. Serb. Chem. Soc.. 2010 Jan Synthesis and characterization of ammonium phosphate fertilizers with boron

  The concentration of boron, an essential micronutrient for plants, presents a narrow range between deficiency and toxicity. In order to provide the boron requirement for plants, and to avoid toxicity problems, boron compounds are mixed with basic fertilizers. Sodium borate pentahydrate was used as a boron source. Ammonium orthophosphates fertilizers with boron were prepared by… Read Abstract

• Journal of Experimental Botany. 2017 Mar Ammonium as a signal for physiological and morphological responses in plants

  Ammonium is a major inorganic nitrogen source for plants. At low external supplies, ammonium promotes plant growth, while at high external supplies it causes toxicity. Ammonium triggers rapid changes in cytosolic pH, in gene expression, and in post-translational modifications of proteins, leading to apoplastic acidification, co-ordinated ammonium uptake, enhanced ammonium assimilation, altered oxidative and phytohormonal… Read Abstract

• Sheng Wu Gong Cheng Xue Bao. 2019 Sep Acellular vascular scaffolds modified by ammonium phosphate zwitterions can effectively resist thrombosis and promote endothelialization in vitro.

  Due to limited availability of autologous blood vessels (blood vessels from the same recipient used for vascular transplantation materials) and inadequate growth ability of non-autologous blood vessels (artificial blood vessel transplantation materials), more and more attention has been paid to tissue engineering blood vessels. In this study, we constructed an ammonium phosphate zwitterion modified acellular… Read Abstract

• Chemosphere. 2015 Sep Combination of powdered activated carbon and powdered zeolite for enhancing ammonium removal in micro-polluted raw water.

  Even zeolite is promising in ammonia pollution disposing, its removal efficiency is frequently interfered by organics. As activated carbon has good removal efficiency on organic contaminants, combination of two adsorbents may allow their respective adsorption characteristics into full play. This paper provides a performance assessment of the combination for enhancing ammonium removal in micro-polluted raw… Read Abstract

• Journal of Pharmaceutical Sciences. 2014 Aug Physical characterisation and long-term stability studies on quaternary ammonium palmitoyl glycol chitosan (GCPQ)--a new drug delivery polymer.

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• Acta Physiologica. 2015 Jun Ammonium increases Ca(2+) signalling and upregulates expression of Cav1.2 gene in astrocytes in primary cultures and in the in vivo brain.

  AIM: The primary aim of this study was to identify the effects of hyperammonaemia on functional expression of Cav1.2 L-type Ca(2+) channels in astroglia.METHODS: Primary cultures of mouse astrocytes were used to study effects of chronic treatment (1-5 days) with ammonium chloride, at 1, 3 and 5 mm on depolarization-induced increases in free cytosolic Ca(2+)… Read Abstract

• Journal of Chromatography A. 2016 Dec Headspace gas chromatography based methodology for the analysis of aromatic substituted quaternary ammonium salts.

  The analysis of quaternary ammonium salts (QAS) using GC is often performed by “in injector” pyrolysis to create volatile degradation products for quantification purposes. Besides the risk of severe system contamination, the application of this approach on aqueous samples is problematic. In this work, the sample is treated in a vial with 2,2-dimethoxypropane (DMP) under… Read Abstract

• Stem Cells. 2015 Sep Brief Report: Human Mesenchymal Stem-Like Cells Facilitate Floating Tumorigenic Cell Growth via Glutamine-Ammonium Cycle.

  How mesenchymal stem cells (MSCs) promote tumor growth remains incompletely understood. Here, we show that mesenchymal stem-like cells (MSLCs) are commonly present in malignant pleural effusion or ascites of cancer patients, where they directly interact with tumor cells. Chemokines and chemokine receptors, especially the CCL2/CCR2 pathway, are involved in this interaction. As a result, MSLCs… Read Abstract

• International Journal of Food Microbiology. 2014 May New insights into the advantages of ammonium as a winemaking nutrient.

  Nitrogen limitation is the most common cause for stuck or sluggish fermentation in winemaking, and it is usually dealt with by supplementing grape juice with either ammonium salts or organic nutrients. These practices have a direct impact on both fermentation kinetics and the sensorial features of the final product. The aim of this work is… Read Abstract

• Science of the Total Environment. 2019 Jan Development of a polydimethylsiloxane-thymol/nitroprusside composite based sensor involving thymol derivatization for ammonium monitoring in water samples.

  This report describes a polydimethylsiloxane (PDMS)-thymol/nitroprusside delivery composite sensor for direct monitoring of ammonium in environmental water samples. The sensor is based on a PDMS support that contains the Berthelot’s reaction reagents. To prepare the PDMS-thymol/nitroprusside composite discs, thymol and nitroprusside have been encapsulated in the PDMS matrix, forming a reagent release support which significantly… Read Abstract

• Proceedings of the National Academy of Sciences of the United States of America . 2014 Jul Direct observation of electrogenic NH4(+) transport in ammonium transport (Amt) proteins.

  Ammonium transport (Amt) proteins form a ubiquitous family of integral membrane proteins that specifically shuttle ammonium across membranes. In prokaryotes, archaea, and plants, Amts are used as environmental NH4(+) scavengers for uptake and assimilation of nitrogen. In the eukaryotic homologs, the Rhesus proteins, NH4(+)/NH3 transport is used instead in acid-base and pH homeostasis in kidney… Read Abstract

• Journal of Experimental Botany. 2017 Mar Ammonium as a signal for physiological and morphological responses in plants

  Ammonium is a major inorganic nitrogen source for plants. At low external supplies, ammonium promotes plant growth, while at high external supplies it causes toxicity. Ammonium triggers rapid changes in cytosolic pH, in gene expression, and in post-translational modifications of proteins, leading to apoplastic acidification, co-ordinated ammonium uptake, enhanced ammonium assimilation, altered oxidative and phytohormonal… Read Abstract

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