Some reactions of hydrated electron in acid medium (pH 0·6–4·0)

1969 ◽  
Vol 1 (3) ◽  
pp. 287-295 ◽  
Author(s):  
O. Mićić ◽  
I. Draganić
Keyword(s):  
Acid Medium ◽  
Hydrated Electron ◽  
Medium Ph

Alkaloid Sequestration by Papaver somniferum Latex

1984 ◽  
Vol 39 (9-10) ◽  
pp. 876-881 ◽  
Author(s):  
B. C. Homeyer ◽  
Margaret F. Roberts
Keyword(s):  
Acid Medium ◽  
Considerable Increase ◽  
Papaver Somniferum ◽  
Sodium Vanadate ◽  
Medium Ph ◽  
Alkaloid Sequestration ◽  
Chlormadinone Acetate ◽  
Atpase Inhibitors

Abstract The 1000 x g organelles of Papaver somniferum latex have been shown to accumulate rapidly, large quantities of alkaloids (0.05- 1 mg/mg organelle protein), particularly morphine, thebaine, codeine and papaverine and have been found to exhibit a surprising degree of specificity for the accumulation of these alkaloids. The uptake of alkaloid is independent of temperature and does not show a requirement for ATP 10-3 ᴍ, Mg2+ 10-3 ᴍ, or KCl 10-3 ᴍ. It is unaffected by known ATPase inhibitors (chlormadinone acetate 2.5 × 10-5 ᴍ, N,N-dicyclohexylcarbo- diimide 5 × 10-4 ᴍ and sodium vanadate 10-4 ᴍ) but showed considerable increase in morphine accumulation in the presence of 4-chloromercumbenzoate 5 x 10-4 ᴍ, while N-methylmaleimide 5 × 10-4 ᴍ had no effect, and carbonylcyanide 4-(trifluoromethoxy)phenylhydrazone 5 × 10-4 ᴍ caused a reduction (ca. 30%) of morphine uptake. An acid medium, pH 4.5-5.5, also results in decreased morphine uptake.

Caractéristiques de pectines de marcs de raisins provenant d'essais comparatifs de vinification en rouge

OENO One ◽  
1983 ◽  
Vol 17 (4) ◽  
pp. 269
Author(s):  
J. Mourgues ◽  
J. Courtoisier ◽  
T. Conte
Keyword(s):  
Acid Medium ◽  
Galacturonic Acid ◽  
Dry Weight ◽  
Hot Water ◽  
Medium Ph ◽  
Heat Treated ◽  
C 30

<p style="text-align: justify;">The pectins extracted in a hot acid medium (pH 1,4 at 70 °C for 4 hours) from Carignan pomace washed in hot water (75 °C, 30 mn) desceded and pipped stemmed are different according to the vinification methods. in traditional vinifica tion with crushed grapes, there are changes during the fermentation on skins (reduction in the arnount extracted and in the quality of the pectins). The pectin extract from marc of heat-treated vintage (5,4 % dry weight) contains 77 % galacturonic acid esterified to 52 %, with a jellying power of 63 ° JAKOVLIV or 31 0 SAG. Due to its poor jellying power, it is not possible to forsee and industrial recuperation from the pomace of this variety.</p>

scholarly journals STUDIES ON THE PNEUMONIC EXUDATE

1922 ◽  
Vol 35 (2) ◽  
pp. 153-160 ◽  
Author(s):  
Robert N. Nye
Keyword(s):  
Acid Medium ◽  
Sharp Increase ◽  
Proteolytic Enzyme ◽  
Amino Nitrogen ◽  
Alkaline Media ◽  
Medium Ph ◽  
Gradual Rise ◽  
Cellular Suspension ◽  
Ph Range ◽  
Normal Lungs

1. Washed cellular suspensions of pneumonic lungs, previously preserved with chloroform and toluene, contain a protease or proteolytic ferment, derived chiefly from the leucocytes of the exudate. 2. This protease is able to convert horse fibrin to a non-coagulable split product. In a pH range of 4.0 to 8.0 the digestion is slight at the most acid end. With decrease in acidity there is a gradual rise in activity to pH 6.0, and then a sharp increase up to the maximum digestion at pH 8.0. Judging from the amino nitrogen determinations, the most complete splitting occurs at pH 7.0. The degree of autolysis occurring in the pneumonic lung cellular suspension controls suggests that the active enzyme is identical with that causing the digestion of the fibrin. 3. Washed cellular suspensions of normal lungs, previously preserved with chloroform and toluene, contain a proteolytic enzyme which is active in a moderately acid medium (pH 4.0) and essentially inactive in less acid, neutral, and slightly alkaline media.

Isolation of Epigallocatechin Gallate from Green Tea and its Effects on Probiotics and Pathogenic Bacteria

2017 ◽  
Vol 17 (1) ◽  
pp. 69-77
Author(s):  
Tu Lijun ◽  
Sun Hanju ◽  
He Shudong ◽  
Zhu Yongsheng ◽  
Yu Ming ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Escherichia Coli ◽  
Green Tea ◽  
Lactobacillus Acidophilus ◽  
Pathogenic Bacteria ◽  
Epigallocatechin Gallate ◽  
Microbial Populations ◽  
Medium Ph ◽  
Bioactive Substance ◽  
Tea Extract

The aim of this study was to investigate epigallocatechin gallate (EGCG) prebiotics activities systematically which was reported as a bioactive substance. Therefore, EGCG was separated by water extraction, resin purification and prep-HPLC. Then the production of EGCG was confirmed by HPLC and mass spectrometry (MS) analysis and its purify was 97.23%. EGCG extractive and green tea extract (GTE) were further incubated with Bifidobacterium infantis, B. adolescentis, B. bifidum and Lactobacillus acidophilus to study its effect on microbial populations and medium pH. Finally, Escherichia coli, Salmonella, Staphylococcus aureus and Candida albicans were employed as pathogenic bacteria to explore the antimicrobial activity of EGCG and GTE. The results demonstrated that EGCG extractive could be beneficial for the proliferation of Bifidobacterium and L. acidophilus and also inhibit some pathogenic bacteria. In conclusion, both EGCG extractive and GTE had prebiotics activities and the effects of EGCG extractive were superior to those of GTE.

Kinetics and Mechanism of Oxidation of Paracetamol by Thallic Perchlorate in Acid Medium

2015 ◽  
Vol 4 (3) ◽  
pp. 302-309 ◽  
Author(s):  
Deepmala Pareek ◽  
Riya Sailani ◽  
Vinita Gupta ◽  
Chandra Khandelwal ◽  
Prem Sharma
Keyword(s):  
Acid Medium ◽  
Kinetics And Mechanism ◽  
Mechanism Of Oxidation
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