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Register a new userEffect Nutrients and Temperature on The Total Growth and Chemical Composition to The Green Algae Chlorella vulgaris
تأثير المغذيات و الحرارة في النمو و التركيب الكيميائي للطحلب الأخضر Chlorella vulgaris
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أُجريت في هذا البحث دراسة تأثير تراكيز مختلفة من النترات و الفوسفات و مستخلص التربة في النمو و التركيب الكيميائي للطحلب الأخضر Chlorella vulgaris المعزول من بعض المسطحات المائية المحلية، عند ثلاث درجات حرارة (20 – 25 – 30 درجة مئوية)، بلغ أعلى معدل نمو 4.66 خلية/ساعة و أقل زمن تضاعف 1.55 ساعة و ذلك عند درجة حرارة 25 درجة مئوية و عند تركيز 1 غ/ل نترات و 0.05 غ/ل فوسفات و 10مل/100 محلول تربة، حيث وصل عدد الخلايا إلى 59423.61 خلية/مل في اليوم 22 من الاستزراع. اختلف التركيب الكيميائي للطحلب باختلاف درجة الحرارة و تركيب الوسط المغذي اذ بلغ أعلى محتوى بروتيني 48.36 % عند التركيز الأعلى من المغذيات و عند درجة حرارة 25 درجة مئوية، و أعلى تركيز للدسم 19.78% عند درجة حرارة 25 درجة مئوية و تركيز 0.1 غ/ل نترات و 0.01 غ/ل فوسفات و 6مل/100 محلول تربة، أما تركيز السكريات فكان الأقل حيث كانت أعلى نسبة 17.41% عند درجة حرارة 20 درجة مئوية.
The effect of different concentrations of nitrate and phosphate and soil extract on the total growth and chemical composition to the green algae Chorella vulgaris isolated from some localaquatic habitats had studied in this research, at three type of temperature (30 , 25, 20), the maximum total growth reached up to 4.66 Cell/h and the lowest duplicated time was 1.55 h at temperature 25ºC and at concentration of nitrate 1 g/L , 0.05 g/L of phosphate, and 10/100 mL of soil solution , while the number of cells reached to 59423,61 cell/mL at the day 22 of cultivation. The chemical composition differed by the changing of temperature and nutrient medium composition , while the maximum protein content reached to 48.36 % at the maximum concentration of nutrients and 25 ºC of temperature , the maximal concentration of lipid was 19,78 % at temperature 25ºC and concentration of nitrate 0.1 g/L and 0.01 of phosphate and 6/100 mL of soil solution , the concentration of carbohydrates were the lowest where the maximal ratio was 17.41 % at temperature 20ºC .
References used
AHMED. M. A; DAWWOOD. S. ; ANFAL. N. A.The quantity determination of total carbohydrates and monosaccharides. from some green algae (Chlorophyta) Marsh Bulletin 7,27-38. 2012, P12
AL-AARAGY,M.J. Studies on the mass culture of freshwater microalgae as live food .for fish larvae.Ph.D.thesis,Collegeof Science, Basrah Uviversity.1996, 107pp
BARBOSA, J. M; HOOGAKKER, J; WIJFFELS, H. R. Optimisation of cultivation parameters in photobioreactors for microalgae cultivation using the Astat technique, Biomolecular Engineering 2003 , 115_/123
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areas , and test effect some conditions (light intensity,Nitrat and
phosphate concentrations ,solution soil) on its Growth Range and
Duplicated time the cells.
Chemical composition of the essential oil of the aerial parts of Artemisia
vulgaris L. (Asteracea), grown in Syria was determined by GC/MS. The oil
obtained by hydrodistillation, was found to contain 55 components, accounting
for 98.82 %.
According to the algae ability in photosynthesis and carbohydrate production with
high value in nutrition and industry, this research was carried out during 2015 to study the
qualitative and quantitative content of carbohydrates in Chlorella vulgar
is which was
isolated from southern Syrian fresh water, and to determine the effect of the growth
conditions; temperature (15, 25, 35 C), sodium nitrate concentration (0.1, 0.25, 0.4 g/l) and
pH (6, 7, 8) on that content. The results showed that the total content was in the range of
20% to 40%;with galactose and rhamnose dominating among the rest of sugars. The
temperature 15°C was the best to get the greatest total content with the highest value of
starch, cellulose, hemicellulose and pectin. In addition, the low nitrate concentration 0.1 g/l
was combined with the highest content of pectin and its compounds, while the glucose
content was not affected by the nitrogen concentration. Related to pH effect, the acidic
media was proved to be the best for the highest carbohydrate content. Moreover, cellulose,
starch, and pectin increased in the alkali medium over the rest of carbohydrates.
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Ten samples of dry, cooked Chickpea, Homos with Tahina, and Falafel were
randomly collected from different places in Damascus and urban side during
2003-2004 with an average weight of 200g for each sample. Chemical
composition, amino acids, fatty
acids, and minerals were determined to
investigate the effect of cooking and frying on the nutritional value of chickpea
products.
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