Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userBiotransformation of Phosphogypsum by Sulphate-Reducing Bacteria in Media Containing Different Sources of Carbon
التحول الحيوي للفوسفوجيبسوم بوساطة الجراثيم المرجعة للكبريتات في أوساط تحتوي مصادر مختلفة من الكربون
1334
0 10
0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
تمت دراسة مزيج من الجراثيم المرجعة للكبريتات (Desulfotomaculum, Desulfovibro ,(Desulfotomonas من أجل التحول الحيوي للفوسفوجيبسوم المدروس. و تبين أنه يمكن إذابة الفوسفوجيبسوم (مقدرة غ/ل) في أوساط ذات مصادر مختلفة للكربون تحتوي اللاكتات (3.65/ل), كحول (2.9غ/ل), كازئين (2.8غ/ل), كانت نسبة الإذابة أقل في الوسط المحتوي الغلوكوز (2.1غ/ل), و أقل بثلاث مرات تقريباً في الوسط الذي يحتوي خلات الصوديوم (1.35/ل). تم حساب التحول الحيوي للفوسفوجيبسوم على أساس كبريت الهيدروجين المنطلق في الوسط, و الذي سجل أعظم قيمة له في الوسط المزود بالكحول حيث بلغت (1.29/ل). كما وجد أن الجراثيم المعزولة فعالة جداً في إرجاع الكبريتات من الفوسفوجيبسوم في الوسط المزود بالكحول (2.15غ/ل), و تخفيض (98.03%) من الاحتياج الكيميائي للأكسجين في الوسط المزود بالغلوكوز, و أكبر كمية ذائبة للفوسفوجيبسوم أزيلت في الوسط المزود باللاكتات ثم الكحول فالكازئين كمصدر للكربون.
Mixture of sulphate-reducing bacteria (SRB) (Desulfotomaculum, Desulfovibro, Desulfotomonas) were studied for the biotransformation of phosphogypsum. This study shows that the greatest reduction of phosphogypsum (g/l) was possible among different cultures of carbon containing lactate (3.65), ethanol (2.9), casein (2.8); the melting rate was lower in the medium containing glucose (2.1), and three fold less in the medium with sodium acetate(1.35) almost. The biotransformation of phosphogypsum, was calculated on the basis of amount of hydrogen sulphide in cultures. In the studied cultures the greatest amount of hydrogen sulphide was produced from medium containing alcohol (1.29g/l). These isolated bacteria were found to be very effective in the reduction of (2.15 g/l) sulfate from phosphogypsum, with (98.03 %) reduction of Chemical Oxygen Demand in medium with glucose. The greatest amount of dissolved phosphogypsum was removed from medium containing Lactate, ethanol, casein respectively as sources of carbon.
References used
Gadd,G.M.; White,C., 1996. Mixed Sulfate-Reducing Bacterial Cultures For Bioprecipitation Of Toxic Metals:Factorial And Re- Sponse-Surface Analysis Of Dilution Rate,Sulfate And Substrate Concentration.Microbiol. 142,197
Kowalski,W.; Przytocka-Jusiak,M.,Wolicka,D.,Holub W., 1998. Biotransformacja Fosfogipsu W Podlozach Zawierajacych Zwiazki Organiczne Stanowiace Gtowne Zanie-Czyszczenia Roznych Pty Nnych Odpadow Organiczny Ch.Bi-Otechnologia Srodowiska, 213-220
Almeid.D, Belgium .,1998. Phosphogypsum Awaste (More Or Less Harmful) Or A Resource? Presented At The Ifa Technical Conference, Marrakech, Morocco , September
Kowalski,W.; Wolicka,D.; Holub,W.; Przytocka-Jusiak M., 2000. Biotransformacja Fosfogipsu W Hodowlach Beztlenowej Mikroflory Namnazanej Z Roznych Srodowisk Na Podlozach Z Etanolem.Inzynieria Srodowiska, 45,211
Przytocka-Jusiak,M.; Kowalski,W.; Rzeczyc- Kam.,Błaszczyk M.; Mycielski,R., 1995. Microbiologi- Cal Phosphogypsum Transformation Products In Thermophilic Anaerobic Cultures.(In Polish).Biotechnologia. 29,103
rate research
Read More
This research work aimed to study the effect of different mixtures of growing media
on pepper seedlings and their ability to withstand transplanting shock.The variety QarnAlgazal
of pepper and five mixtures of growing media were used.The mixtures i
ncluded bitmoss
alone,bitmoss with equal volume of soil or sand,soil and cow manure in a ratio of
1:2,and cow manure with soil and sand in a ratio of 1:1:1.
The experiments were implemented in aplastic green house without heating in the
nursery farm of the faculty of Agriculture,Tishreen University.The completely randomizel
design was adopted with three replications for each treatment and 15 plants for each replication.
The results showed that themedia containing cow manurewere the more effective ingrowth
of sapling as represteded by the increased hieght of sapling, number and area of
leafs,fresh weight of both biomass and roots of sapling.The effect was very clear in the
media containing cow manure and soil in the ratio of 1:2.
This research was conducted estimate total count of bacteria, and the census total coliform group, fecal coliforms, Escherichia coli .
Inhibition activity of extracts (acetone, ethanol, water) parts of the (Myrtus
communis L.) (root, stem, leaves, fruits) with concentrations (25,50,75,100%)
was carried out against growth of Gr- and Gr+ bacteria which were isolated and
identified
from the pathogenic specimens of The University Children's Hospital
bacterial laboratory in Damascus, using agar well diffusion method on Mueller
– Hinton medium.
This paper investigates incorporating quality knowledge sources developed by experts for the medical domain as well as syntactic information for classification of tweets into four different health oriented categories. We claim that resources such as
the MeSH hierarchy and currently available parse information are effective extensions of moderately sized training datasets for various fine-grained tweet classification tasks of self-reported health issues.
Raman spectra of Carbon Tetrachloride in Methanol solutions were
measured. Spectral lines n1 (symmetric stretch vibrations), n3 (asymmetric
stretch vibrations) of Carbon Tetrachloride were analyzed. The Raman spectra
were fitted using Peak-Fit sof
tware applying a sum of Gaussian and Lorentzian
components. Results indicate that, there is a clear difference in the behavior of
peak position and width of the two type of vibrations with varying the
structural composition of the surrounding environment due to varying of the
methanol concentration. On the other hand we found that a similarity in the
dependence of the intensity of spectral lines on the concentration of methanol,
with a high degree of non-linearity.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
