Simultaneous Determination of Copper and Manganese as their Ternary Complexes with Alizarin Complexone and Fluoride using First derivative Spectrophotometry / التقدير المتزامن للنحاس و المنجنيز على هيئة متركباتهما الثلاثية مع الاليزارين كومبلكسون و الفلوريد وذلك باستخدام القياسات الطيفية المشتقة.
A sensitive and selective spectrophotometric method for rapid simultaneous determination of copper and manganese is proposed. The method is based on the ternary metal complexes with alizarin complexone (alizarin-3-methylamine-N,N-diacetic acid , AC) and fluoride, and the use of zero-crossing and derivative ratio spectra techniques. The range 2.54 – 12.7 ?µg ml-1 copper could be determined in the presence of 2.19 – 10.9 µg ml-1 manganese and vice versa. The developed methods were applied for the simultaneous determination of copper and manganese in their binary mixtures and were found to give satisfactory results.
Effect of the application of molasses and vinasses on the yield and quality of sugar beet and soil fertility / تأثير إضافة المولاس والفيناس على المحصول والجودة في بنجر السكر وخصوبة التربة
قطاع الدراسات الزراعية /
تخصص البحث :
Egyptian sٍugar journal / / vol.17 - 5/7/2022
تاريخ تقديم البحث 04/07/2022
تاريخ قبول البحث 05/07/2022
عدد صفحات البحث 17
اسماء فتحى محمود
Mohamed M. Abofard - مؤلف رئيسي
and Salah F. Abou-Elwafa
Sugar beet; Sugar yield; Juice quality; Soil amendment; Soil fertility
Beet sugar industry in the tropics and subtropics is growing as an important component of sugar production. In Egypt, sugar beet has acquired more importance and becoming an important source of refined sugar. Large amounts of beet sugar byproducts are produced resulting in environmental pollution. The surface application of molasses has significantly increased root yield, and the highest root yields were produced from either the control treatment and the application of 150 L/fed. of molasses to the soil surface. The highest root yield values were produced from the Belino variety under the control treatment and the Kawimera variety under the surface application of 150 L/ fed. of molasses. Surface application of molasses at the rate of 150 L/ fed. resulted in the highest sugar content. The highest values of the quality index, recoverable sugar (RS%) and recoverable sugar yield (RSY) from the Belino and Kawimera varieties were produced from the surface application of 150 L/ fed. of molasses. Meanwhile, the foliar application of vinasses at the rate of 4% (v/v) resulted in the lowest values of quality index, recoverable sugar% and recoverable sugar yield. The lowest values of Na%, K% and ?-amino N% from both varieties resulted from the surface application of 150 L molasses. Moreover, the highest values of the quality index (QZ), recoverable sugar (RS%) and recoverable sugar yield were produced from the surface application of 150 L/ fed. of molasses. Compared to the control treatment, applying molasses at the rate of 150 L/ fed. improved the available N, P and K as well as the organic matter, calcium and magnesium contents in the soil after sugar beet harvest. The data indicate that molasses is a promising organic soil amendment that enhances sugar beet yield and yield-related traits through improving the physical and chemical properties of the soil. Besides, the application of beet sugar molasses can improve sugar beet quality through improving juice quality by reducing impurities content that retard sugar extraction.
Biodegradation of Hydroquinone Compound in Pharmaceutical Wastewater using the Penicillium Citrinum AUMC14751 Isolate / التحلل البيولوجي لمركب الهيدروكينون من مياه الصرف الدوائي عن طريق فطر بنسليوم سيترانيوم AUMC14751
Hydroquinone compounds are the most common pollutant in pharmaceutical and industrials wastewater and these have been known as health risks to human and aquatic organisms even at low concentrations. Hydroquinone is toxic for aquatic organisms at the concentration level of 4ppm/L. Therefore, it is very important to remove hydroquinone from contaminated water before discharge into any natural water. The present study focused on the isolation of fungi from samples collected from different location in the hydroquinone production. Surveying the fungal species showed that 49 out of 432 samples (11.3%) were positive for fungal growth given three genera of fungi (Aspergillus sp, Penicillium sp, and Fusarium sp). The collected samples were enriched in sterile Minimal Salt Medium (MSM). Hydroquinone used as the sole carbon source. Fungal growth was screened to determine their ability to grow and degrade Hydroquinone at 500 ppm concentration. A total of 15 isolates that have the capability to growth in MSM supplemented with hydroquinone were selected to identify at Mycological Center, Assiut University. The results demonstrate that the genus of Aspergillus was the most predominant being represented by 40 % of all fungal isolates, followed by Penicillium species 33 % and Fusarium species 27 %. Out of these 15 isolates, Penicillium citrinum AUMC14751 was selected to determination the biodegradation rate of hydroquinone by HPLC analysis. The rate of hydroquinone degradation due to the fungal consumption of hydroquinone as a sole carbon source was increased gradually depending on the time. HPLC results indicated that the rate began gradually increased in the presence of isolate of P. citrinum AUMC14751 starting from 0.63% after the second day up to the tenth day. The maximum percentages of the hydroquinone degradation rate appeared after 10 days at 97.02%.
Behavior of Cationic Color Precipitants as Alternatives of Hydrogen Peroxide in Raw Sugar Melt Clarification Process / دراسة سلوك مرسبات اللون الكاتيونية كبديل لفوق أكسيد الهيدروجين
There is regenerate interest in the sugar industry to get to high performance in color removal during clarification process of raw sugar melt. Many efforts have conducted to approach the most proper alternative decolorants. The present study is focusing on investigation of cationic color precipitants “CCP” as alternatives of “H2O2” in clarification of raw sugar melt in Egypt. The experiments have performed using a pilot plant at Quos sugar factory, Qena governorate, Egypt. In these experiments, a comparison between two types of “CCP” (S TYPE 20 and TACELENE 4015) have been evaluated from the standpoint of decolorization efficiency. The behavior of the most effective matter has studied via the effect of dosage, pH, retention time and feeding point on the decolorization efficiency. A comparison between S TYPE 20 and hydrogen peroxide H2O2 in decolorization of raw sugar melt has conducted. The results show that, (S TYPE 20) is more effective than (TACELENE 4015) with percentage of color removal of 33.11% and 20.70% respectively. In addition, the results revealed that the proper experimental conditions for application S TYPE-20 are 7.4-pH, 30-minutes retention time and 100-ppm dosage. Addition of S TYPE 20 after clarification is the most proper feeding point. The results of comparison between S TYPE 20 and H2O2 show that decolorization percent are 40.40% and 27.70% respectively. Depending on these results, we concluded that the cationic color precipitants can be used successfully as decolorizing agents to replace hydrogen peroxide.
Citric Acid Production by Cellulose Decomposing Black Aspergillus Species Isolated from Sugarcane Bagasse / إنتاج حامض الستريك بواسطة فطريات الأسبرجيللس السوداء المحللة للسليلوز والمعزولة من باجاس قصب السكر
In the current investigation, the potentiality of black Aspergillus species isolated from sugarcane bagasse to produce cellulolytic enzymes, and citric acid was evaluated. Furthermore, the cellulolytic activity and citric acid production by the active producers were assayed on a carboxy methylcellulose medium. The study was extended to improve citric acid production from sugarcane bagasse using mixed cultures of the highest endo-cellulases (CMCase) and citric acid-producing isolates. All the tested fungal isolates exhibited varying amounts of acid production on Czapek’s dextrose (Cz-Dox) solid medium containing CaCO3. The highest concentration of citric acid produced using a Cz-Dox liquid medium was 8.49 ±2 g/L as recorded by A. brasiliensis Am 27. This amount of citric acid is equivalent to 29.22% of initial sugar. A.niger Am 270 showed the highest endo-cellulases production (0.73±0.2 IU/mL) whereas A. niger Am 258 exhibited the highest citric acid yield (14.74%). These isolates were chosen for the maximization of citric acid production from sugarcane bagasse. The highest amount of citric acid from sugarcane bagasse medium by A. niger Am 258 was obtained after 10 days of incubation, recording 34 g/L citric acid and by increasing the incubation period, the obtained amount of citric acid decreased. Whereas the mixed cultures of Am 270 and Am 258 strains revealed a slight enhancement of citric acid production recording 35.1 g/L citric acid after 8 days of the total incubation period. So the presented results may provide a suitable strategy for citric acid production using sugarcane bagasse.
Sugar beet (Beta vulgaris L.) is the second source of sugar all over the world. A field experiment was carried out during the 2019/2020 and 2020/2021 growing seasons to study the performance of two sugar beet varieties under three planting densities and three planting dates. Planting densities, planting dates and varieties as well as their interactions exhibited significant effects on all studied traits including, root length and diameter, root and top yields, sucrose content, impurities%, quality index (Qz), recoverable sugar (RS)%, and recoverable sugar yield (RSY). The highest root length and diameter from planting sugar beet at a density of 28,000 plants/feddan (Feddan = 4200 m2) in both growing seasons. Meanwhile, the highest values of the remaining studied traits were produced from cultivating sugar beet at 42,000 plants/ feddan Superiority in all studied traits was scored to the September 25th planting date. The variety Hercules surpassed the Husam variety in all the measured desirable traits in both growing seasons. Moreover, the variety Hercules produced the highest values of root and top yields, sucrose content, impurities%, quality index (Qz), recoverable sugar (RS)% and recoverable sugar yield (RSY) when planted at a planting density of 42,000 plants/ feddan on September 25th in both growing seasons.
A major problem that affects the proper functioning of cane knives is the durability of the knife blades which is affected by the accelerated wear of the cutting edge. Wear analysis was performed within the 2019 and 2020 seasons on locally produced knives that are typically used by the Guirga Sugar Factory. These blades are produced from rectangular 20 mm thick St.52-3 mild steel plates strengthened by hard facing with a hardness 360 HB welded layer. During the 2021 season, commercially supplied 500 HBW knife blades with trade name (Hardox 500) were used. In all experiments, blade wear was evaluated by means of the blade-area loss method. Lower wear rates were recorded significantly for commercial blades than for local blades. Commercial blades served the entire crushing season without the need for re-sharpening or replacement and with minimum downtime. However, eight commercial blades were broken and separated from the knife set during the entire crushing season, while stones’ impact on local knife blades led only to distortions in blades and breakage of fitting bolts.
جميع البيانات التي يتم تسجيلها على النظام هي ملك للجهة صاحبة هذه البيانات
لا يتم الاطلاع على هذه البيانات من قبل مهندسي المركز إلا للضرورة القصوى ولغرض الدعم الفني وبالاتفاق مع الجهة صاحبة البيانات شفوياً أو كتابياً
لا يتم إعطاء أي بيان من بيانات النظام لأي فرد او جهة فرعية تنتمي للجهة صاحبة البيانات او لأي جهة أخرى إلا بموافقة كتابية من الجهة صاحبة البيانات
يمكن استخدام البيانات المسجلة على النظام بهدف عمل إحصائيات يستفاد منها فى قياس اداء النظام وكفاءة استخدامه من قبل مستخدميه
يتم تأمين جميع البيانات الخاصة بالنظام من خلال تأمين الحاسب الخادم الذي يستضيف البيانات ومن خلال تأمين انتقال البيانات بين جهاز المستخدم والحاسب الخادم وكذلك تأمين واجهة النظام التي يستخدمها المستخدم
كل مستخدم للنظام مسئول مسئولية كاملة عن كلمة المرور الخاصة به وعليه اتخاذ كافة الاحتياطات الممكنة حتى لا يستطيع أى شخص آخر الحصول عليها
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