Light emitting diodes (LEDs) with their antibacterial effect present a novel method for food preservation. This effect may be influenced by environmental conditions such as the pH of the food contaminated by the pathogen. Thus, it is necessary to investigate the influence of pH on the antibacterial effect of LEDs before their application to real food matrices. Escherichia coli O157:H7, Salmonel...

In this work, the backward Bayesian multiple linear regression (BBMLR) as a new approach is presented to predict the adsorption efficiency (AE) of Cd(II) ions by ostrich bone char (OBC) in the fixed bed adsorption with four operational variables consisting of pH (2-9), inlet Cd(II) concentration (Co= 25-100 mg/L), bed depth (h= 3-9 cm) and feed flow rate (Q= 0.5-30 mL/min). The performance of t...

Abstract This experimental study concerns the elimination of fluoride from water using an electrocoagulation reactor having a variable flow direction in favour increasing electrolysing time, saving area, and mixing. The detention time space-saver EC (S-SECR) was measured compared to traditional reactors inert dye (red drain dye). Then, influence electrical current (1.5 ≤ δ 3.5 mA cm−2), pH (4 1...

The promising advantages of Prussian Blue (PB) as catalyst and of the thick film screen printing technology have been combined to assemble sensors with improved characteristics for the amperometric determination of H(2)O(2). PB-modified screen printed electrodes were applied to detect H(2)O(2) at an applied potential of -0.05 V versus the internal screen printed Ag pseudoreference electrode, sh...

Influx ofd-aspartate (d-Asp),l-glutamate (l-Glu), and serine (Ser) across the brush-border membrane of the intact mucosa from rabbit ileum has been examined. l-Glu influx is chloride independent and completely sodium dependent.d-Asp andl-Glu share a transport system with a maximum transport rate of 1 μmol ⋅ cm-2 ⋅ h-1and an apparent affinity constant ( K ½) of ∼0.3 mM. The function of this tran...

MEYER, JAMES H., AND MORTON I. GROSSMAN. Comparison of Dand L-phenylalanine as pancreatic stimulants. Am. J. Physid. 222(a) : 1058-1063. 1972.-In dogs with pancreatic fistulas and arrangements for perfusing intact intestine, the following observations were made: 1) during continuous intravenous infusion of a submaximal dose of secretin, instillation of L-phenylalanine at pH 7 into the duodenum ...

A new kind of low-cost syntactic adsorbent from bamboo charcoal and chitosan was developed for the removal of microcystin-LR from drinking water. Removal efficiency was higher for the syntactic adsorbent when the amount of bamboo charcoal was increased. The optimum dose ratio of bamboo charcoal to chitosan was 6:4, and the optimum amount was 15 mg/L; equilibrium time was 6 hr. The adsorption is...

We describe a rapid, reliable "high-performance" liquid-chromatographic method of simultaneously analyzing for 4-hydroxy-3-methoxymandelic acid (I) and 4-hydroxy-3-methoxyphenylacetic acid (II) in urine. Paired-ion chromatography and amperometric detection are used in the method. A 5-mL aliquot of urine is adjusted to pH 6.1 and subjected to anion-exchange chromatography (Dowex AG 1-X4, 1.8 X 0...

This study focused upon the determination of physicochemical and microbial properties, including metals, selected anions and coliform bacteria in drinking water samples from hand-dug wells in the Kumasi metropolis of the Republic of Ghana. The purpose was to assess the quality of water from these sources. Ten different water samples were taken from different parts of Kumasi, the capital of the ...