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Articles 1 - 30 of 61
Full-Text Articles in Biochemical and Biomolecular Engineering
Recent Advances In Bioethanol Production From Water Hyacinth: A Critical Review, Umuamina A. Matola, Mahir Mohammed Said, Olga-Ioanna Kalantzi, Abraham K. Temu
Recent Advances In Bioethanol Production From Water Hyacinth: A Critical Review, Umuamina A. Matola, Mahir Mohammed Said, Olga-Ioanna Kalantzi, Abraham K. Temu
Tanzania Journal of Engineering and Technology (TJET)
Water hyacinth (WH) is a highly invasive tropical aquatic weed with high holocellulose and low lignin content, making it a promising lignocellulosic feedstock for second-generation bioethanol production. Producing bioethanol from WH offers a sustainable approach to simultaneously managing invasive biomass and producing renewable energy. This review critically evaluates recent advancements in bioethanol production from WH by examining pretreatment, hydrolysis, and fermentation technologies reported between 2014 and 2024. A PRISMA-guided literature search was conducted using the Scopus and Web of Science databases, and fifty-nine original research articles were selected for analysis. The reviewed studies were comparatively assessed based on pretreatment strategies, …
Condition Optimization For The Synthesis Of Castor Oil Templated Mesoporous Silica, Godlisten Namwel Shao
Condition Optimization For The Synthesis Of Castor Oil Templated Mesoporous Silica, Godlisten Namwel Shao
Tanzania Journal of Engineering and Technology (TJET)
The present work provides suitable conditions for the synthesis of mesoporous materials with improved porosity using an optimization technique. The proposed preparation method involves forming final products by varying the amount of castor oil, media, and template removal. The obtained samples were examined by TGA, XRD, DRIFT and nitrogen physisorption studies. It was observed that the porosity of the obtained samples was dependent on the conditions under which the materials were synthesized. All synthesized materials showed the Type IV adsorption-desorption isotherm features of mesoporous, regardless of the conditions utilized during the synthesis. The sample synthesized using 2.5 g of a …
Development And Experimental Validation Of A Non-Invasive Blood Group Detection System, Nurath K. Nurudini
Development And Experimental Validation Of A Non-Invasive Blood Group Detection System, Nurath K. Nurudini
Tanzania Journal of Engineering and Technology (TJET)
An individual's blood group consists of red blood cell antigens whose composition is determined by protein presence, antigen structure, and gene series. Persons aged above six months have significant anti-A and/or anti-B in their serum. During transplantation and transfusion, ABO blood group identification is the most essential factor. The conventional method involves drawing blood samples from patients, and the blood group is determined based on the antigen-antibody reaction. This method consists of adding chemical reagents. However, this requires time of operation, and throughput analysis is high, and the process is also challenging to interpret. Accurate and rapid identification of blood …
Reduction Of Volatile Acidity Of Grape Wines By Immobilized Lipase, Azamhon Kh. Khasanov, Barno A. Abdullaeva, Xasan T. Khasanov
Reduction Of Volatile Acidity Of Grape Wines By Immobilized Lipase, Azamhon Kh. Khasanov, Barno A. Abdullaeva, Xasan T. Khasanov
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this work is to study the enzymatic transformation of acetic acid into ethyl acetate by immobilized lipases of the fungus Rhizopus microsporus UzLT-1 obtained on the basis of silica gel and phosphatidylethanolamine to reduce the content of volatile acids in grape wines. In the work, a preparation of lipase from the fungus Rhizopus microspores was used. Lipolytic activity was measured by photocolorimetric method using rhodamine 6G as a chromophore agent. The catalytic property of lipolytic enzymes from the fungus Rh.microsporus immobilized on the surface of silica gel coated with polyamides and modified cephalin in aqueous-alcoholic media was …
Influence Of Substrate Temperature On The Properties Of Reactive Dc Magnetron Co-Sputtered Ag-Doped Tio2 Thin Films, Hezekiah B. Sawa
Influence Of Substrate Temperature On The Properties Of Reactive Dc Magnetron Co-Sputtered Ag-Doped Tio2 Thin Films, Hezekiah B. Sawa
Tanzania Journal of Engineering and Technology (TJET)
This study reports on the influence of substrate temperature on the properties of Ag-doped TiO2 thin films. The films were deposited by reactive DC co-sputtering of Ti and Ag targets at different substrate temperatures and Ag target sputtering powers. Grazing incident X-ray diffractometer confirmed that all films were polycrystalline with dominant peak oriented along (101) planes representing the anatase TiO2 phase. The average grain size of the samples improved with increase in deposition temperature. At a substrate temperature of 450 ℃, the samples had a dominant peak representing the rutile phase, suggesting partial transformation from anatase to rutile phase. The …
Production Of Potassium-Rich Biofertilizer From Composted Banana Peels And Watermelon Rinds, Neema O. Msuya
Production Of Potassium-Rich Biofertilizer From Composted Banana Peels And Watermelon Rinds, Neema O. Msuya
Tanzania Journal of Engineering and Technology (TJET)
This study investigated the production of biofertilizer from composted banana peels and watermelon rinds, focusing on the mineral content and its impact on plant growth. The process involved characterizing raw materials, producing biofertilizer, analyzing mineral concentrations (potassium, nitrogen and phosphorus), and evaluating its quality through Spiny Amaranth seed growth. A compost bin with three compartments was designed, testing three composting ratios of banana peels to watermelon rinds (2:1, 1:2 and 1:1). Composting was monitored on moisture content, pH, organic matter, and temperature for 37 days. The 1:1 ratio had the lowest temperature (33.45°C) and highest pH (7.08), while the 2:1 …
Effectiveness Of Natural Coagulants In Purification Of Industrial Wastewater: A Case Of Cactus Pads And Watermelon Seeds, Neema O. Msuya
Effectiveness Of Natural Coagulants In Purification Of Industrial Wastewater: A Case Of Cactus Pads And Watermelon Seeds, Neema O. Msuya
Tanzania Journal of Engineering and Technology (TJET)
This study assessed the potential of cactus pads and watermelon seeds as natural coagulants in industrial wastewater treatment. The global characterization of the two coagulants was done by using the Fourier Transform Infrared (FTIR) to determine the specific functional groups and by zeta potential measurements. A full factorial design was used to design the experiment and analyze the effect of three factors: coagulant dosage, settling time and particle size with three levels each and one replicate on the turbidity removal. ANOVA analyses were used to determine the significance of the factors. Results show that the amino and hydroxyl groups in …
Determination Of The Kinetic Parameters Of Cholesterol Oxidation Using Cholesterol Oxidase From Streptomyces Sp., Meka Saima Perdani, Heri Hermansyah, Muhamad Sahlan, Dwini Normayulisa Putri, Teguh Pambudi, Anggi Khairina Hanum Hasibuan
Determination Of The Kinetic Parameters Of Cholesterol Oxidation Using Cholesterol Oxidase From Streptomyces Sp., Meka Saima Perdani, Heri Hermansyah, Muhamad Sahlan, Dwini Normayulisa Putri, Teguh Pambudi, Anggi Khairina Hanum Hasibuan
Makara Journal of Technology
Cholesterol oxidase (CO) was successfully produced from Streptomyces sp. via the submerged fermentation method, and 69 U/mL enzyme activity was obtained. This study aimed to determine cholesterol oxidation kinetics and the production of CO as a catalyst. The enzyme was diluted to 0.15, 0.075, and 0.00375 U/mL for the oxidation reaction. The substrate was also prepared in three concentrations: 3.23, 6.46, and 12.93 mM. The optimization of conditions for enzymatic cholesterol oxidation was investigated through measurement of the effect of initial cholesterol and enzyme concentrations. Cholesterol concentration was rapidly measured via high-performance liquid chromatography (HPLC). The kinetics of CO were …
The Effectiveness Of Certain Biological Additives Considered By-Products Of The Food Industry In Baker’S Yeast Activation, Nataliya E. Kulikova, Antonina G. Chernobrovina, Natalia N. Roeva
The Effectiveness Of Certain Biological Additives Considered By-Products Of The Food Industry In Baker’S Yeast Activation, Nataliya E. Kulikova, Antonina G. Chernobrovina, Natalia N. Roeva
CHEMISTRY AND CHEMICAL ENGINEERING
One of the ways to increase the efficiency of the activation process of baking yeast is the use of waste and by-products of the food industry as nutrient media. The goal of the study was to develop ways to activate yeast in a nutrient medium with dietary supplements: potato cell sap, whey and quince pomace powder. We demonstrated the effectiveness of the use of biological additives (potato cell juice, quince pomace powder, whey), which are waste or by-products of the food industry to activate yeast. We have established that incubation in a nutrient medium with dietary supplements has a beneficial …
Investigation Of Heavy Metal Composition And Associated Health Risks From Selected Groundwater Wells In Temeke, Dar-Es-Salaam, Justin M. Jeremiah
Investigation Of Heavy Metal Composition And Associated Health Risks From Selected Groundwater Wells In Temeke, Dar-Es-Salaam, Justin M. Jeremiah
Tanzania Journal of Engineering and Technology (TJET)
Water quality continues to be the challenge to residents in Dar es Salaam due to various anthropogenic activities in the city. This study was conducted to assess groundwater quality by determining concentrations of heavy metals. Both probability and Nonprobability sampling techniques were used to collect samples from 40 groundwater wells in 24 wards of Temeke municipal and analysed using Microwave Plasma Atomic Emission Spectrometer (Agilent 4210 MP-AES) at the Geochemistry Laboratory of the University of Dar es Salaam. Results indicated varying heavy metal concentrations ranging from 0.71 ± 0.08 to 6.64 ± 0.21 mg/l for As, 0.02 ± 0.01 to …
Optimizing The Expression Of Polyethylene Terephtalate Hydrolase-Encoding Synthetic Gene In Escherichia Coli Arctic Express (De3), Jocelyn Nataniel, Maria Ulfah, Dini Achnafani, Niknik Nurhayati, Gabriela Christy Sabbathini, Sri Rezeki Wulandari, Abinawanto Abinawanto, Is Helianti
Optimizing The Expression Of Polyethylene Terephtalate Hydrolase-Encoding Synthetic Gene In Escherichia Coli Arctic Express (De3), Jocelyn Nataniel, Maria Ulfah, Dini Achnafani, Niknik Nurhayati, Gabriela Christy Sabbathini, Sri Rezeki Wulandari, Abinawanto Abinawanto, Is Helianti
Makara Journal of Science
The waste of polyethylene terephthalate (PET) plastic waste in Indonesia is a pressing concern due to its slow degradation and potential environmental damage. One promising solution is to utilize polyethylene terephthalate hydrolase from Ideonella sakaiensis (IsPETase), an enzyme that specifically degrades PET. However, inducing the expression of IsPETase synthetic gene in Escherichia coli BL21 (DE3) has been challenging because much of it remains insoluble. This study aimed to express IsPETase in E. coli Arctic Express (DE3) and optimize the conditions to enhance its production. First, pET22b(+)pelB-IsPETase was inserted into E. coli Arctic Express (DE3). The …
Thermogravimetric Analysis And Chemical Kinetics Of Waste Tires, Mahir Mohammed Said
Thermogravimetric Analysis And Chemical Kinetics Of Waste Tires, Mahir Mohammed Said
Tanzania Journal of Engineering and Technology (TJET)
The focus of this paper is to analyse the pyrolysis reaction of waste tires. The pyrolysis was studied experimentally using thermal and chemical kinetics. The tires were pyrolyzed using thermogravimetry at a temperature range of 200 to 600°C, with heating rates of 10, 20, and 50°C/min. The activating energy was observed to increase with increased temperature. The highest activating energy was 101.02 kJ/mol at a heating rate of 50°C/min.
Design And Optimization Of An Azeotropic Distillation Pilot Plant For The Production Of Pure Ethanol, Samwel V. Manyele
Design And Optimization Of An Azeotropic Distillation Pilot Plant For The Production Of Pure Ethanol, Samwel V. Manyele
Tanzania Journal of Engineering and Technology (TJET)
This study aimed to design an azeotropic distillation plant using Aspen Plus® V10 software and determine optimal process conditions for producing pure ethanol greater than 95% from pre-concentrated near-azeotropic ethanol-water solution. The non-random two-liquid Redlich-Kwong thermodynamic model was the base method for property analysis and performance prediction. Modelling and simulation of the converged process were conducted for fixed column variables (R = 5, N = 12 and p = 1 atm). Plant operating parameters were varied in the range of 0 to 1 for the pre-heater vapour fraction, 2 to 10 for the column feed plates (NFP), 2 to 6 …
Enhanced Post Deposition Annealing Conditions On The Fabrication Of High Quality Thermochromic Vanadium Dioxide Films, Nuru R. Mlyuka
Enhanced Post Deposition Annealing Conditions On The Fabrication Of High Quality Thermochromic Vanadium Dioxide Films, Nuru R. Mlyuka
Tanzania Journal of Engineering and Technology (TJET)
Sputter deposition of thermochromic VO2 thin films for smart window applications has been faced with several challenges including the need for high deposition temperature, extremely precise and narrow range of oxygen/argon flow ratio and target poisoning during sputtering. Deposition of VO2 at room temperature without oxygen followed by post-deposition annealing has been cited as one of the potential mitigations to the challenge. In this study, the effects of post-deposition annealing conditions on the structural, electrical and optical properties of VO2 thin films are reported. The films were prepared on soda lime glass substrates using DC magnetron sputtering of metallic vanadium …
Production Of Biofertilizer From Fruit And Garden Waste, Neema Msuya
Production Of Biofertilizer From Fruit And Garden Waste, Neema Msuya
Tanzania Journal of Engineering and Technology (TJET)
The project focused on the production of bio-fertilizer from fruit and garden waste, with a specific emphasis on utilizing pineapple tops in the composting process. The objective was to produce and assess the properties of the bio fertilizer obtained from this process and evaluate its potential application in agriculture. In this study, the composting process was done in a 0.7 m long, 0.85 wide and 1.1 m high vessel, and 0.238 m3 pineapple top wastes, resulting in 0.35 m3 of biofertilizer. The bio fertilizer produced exhibited favorable characteristics, including a moisture content of 36%, pH of 7.1, and a total …
Study Of The Effects Of Thermal Aging Coupled With Shot-Peening Treatment Of Carbonitrided Din 1.6587 Low Alloy Steel On Retained Austenite And Residual Stresses, Richard J. Katemi
Study Of The Effects Of Thermal Aging Coupled With Shot-Peening Treatment Of Carbonitrided Din 1.6587 Low Alloy Steel On Retained Austenite And Residual Stresses, Richard J. Katemi
Tanzania Journal of Engineering and Technology (TJET)
This work investigated the effects of thermal aging and shot-peening of carbonitrided 1.6587 steel grade on retained austenite and residual stresses. After carbonitriding samples contained maximum of 0.87% carbon, 0.34% nitrogen and 50 mass. -% retained austenite. Thermal aging conditions investigated were -30°C, 90°C and 150°C while the aging period were 14, 96 and 720 hours. After thermal aging, some of the samples were subjected to shot-peening treatment using standard cut wire shots StD – G3 - 0.6 mm VDFI 8001 with intensity in the range of 0.25 to 0.30 mmA and coverage of 1.00 to 1.24 x 98%. It …
An Overview Of Maternity Healthcare Monitoring In Developing Nations, Godphrey Kyambille
An Overview Of Maternity Healthcare Monitoring In Developing Nations, Godphrey Kyambille
Tanzania Journal of Engineering and Technology (TJET)
A healthcare monitoring arrangement is essential for frequently monitoring a patient's health status. Specifically, maternal healthcare systems for tracking are utilized to evaluate the clinical status and monitor any abnormal condition changes during all three trimesters. This paper's objective is to conduct an extensive literature review and acknowledge earlier initiatives and studies conducted previously in maternal health care monitoring. This review focuses on accumulating information from earlier work and presents a general overview of previous studies concerning maternal health care monitoring (MHCM). The paper focuses on the maternal healthcare systems in developing countries accessed by pregnant women during the antenatal …
Efficient Discovery And Industrialized Manufacture Of Terpenoids, Haoming Chi, Liying Er, Tiangang Liu
Efficient Discovery And Industrialized Manufacture Of Terpenoids, Haoming Chi, Liying Er, Tiangang Liu
Bulletin of Chinese Academy of Sciences (Chinese Version)
Terpenoids, a class of chemical entities with diverse biological activities in nature, demonstrate significant potential for applications in fields such as drug discovery, flavor industry, and agriculture. However, traditional methods face challenges, including inefficiency and high costs, in the discovery and industrialization of terpenoids. The rapid development of synthetic biology, genomics, artificial intelligence, and automation provides new opportunities for efficient terpenoid discovery and industrialization. This study comprehensively analyzes how these technologies synergistically contribute to the discovery, optimization, and large-scale production of terpenoids, and summarizes the current high-yield situations of terpenoids. The aim is to propose innovative strategies to accelerate technological …
Extraction And Characterization Of Collagen From Cattle Horns For Potential Wound Healing, Yeriko Halson
Extraction And Characterization Of Collagen From Cattle Horns For Potential Wound Healing, Yeriko Halson
Tanzania Journal of Engineering and Technology (TJET)
The need for bandages and gauze for wound dressing and healing is inevitable due to the high increase in accidents. Most of the material used for the production of bandages and gauzes for wound healing are from non-renewable synthetic material. The sustainability of non renewable resources is at jeopardy due to the health and associated environmental impact. Consequently, the use of naturally occurring and biodegradable material is a promising solution to the sustainability challenges of synthetic material. In this paper, the extraction of collagen films from cattle horns for potential wound healing is reported. Collagen was extracted from cattle horns …
3d Printed Composite Structures For Bone Repair And Drug Delivery Application, Innocent J. Macha
3d Printed Composite Structures For Bone Repair And Drug Delivery Application, Innocent J. Macha
Tanzania Journal of Engineering and Technology (TJET)
Due to the increase in traffic accidents, industrial contingencies, and natural disasters, there is a high demand for bone regeneration biomaterials. Although bone can regenerate and self-repair, it is difficult to do so when the defect area exceeds the critical repair area due to trauma, tumour resection, or congenital diseases. The traditional methods for bone repair are autograft, allograft, and xenograft. However, these methods have flaws and limitations, such as complications in the donor bone area, a limited number of donors, rejection, and infectious diseases. However, in recent years, the use of additive manufacturing technologies in bone tissue engineering has …
Preparation And Characterization Of Microporous Cellulose Membranes As Potential Pathogen Filters, Peresi M. Bulemo
Preparation And Characterization Of Microporous Cellulose Membranes As Potential Pathogen Filters, Peresi M. Bulemo
Tanzania Journal of Engineering and Technology (TJET)
Growth and development in the textile and fashion industry have resulted in the generation of large amounts of industrial pre consumer textile wastes. It is estimated that 10 to 20% of textile fabrics are wasted during garment manufacturing, with most of the wastes being burned or landfilled. Reusing pre-consumer fabric wastes is therefore considered a viable approach to alleviate environmental impacts associated with their disposal. To achieve a higher porosity membrane, pre-consumer cotton fabrics were partially dissolved in a solution of dimethyl acetamide (DMAc) and lithium chloride (LiCl), and the resulting fibre suspension was utilized to prepare a microporous cellulose …
Cellulose-Keratin Supramolecular Composite: Conformation By Combined Fourier Transform Spectroscopy And Partial Least Square Regression Coefficient, Ngesa Ezekiel Mushi Dr
Cellulose-Keratin Supramolecular Composite: Conformation By Combined Fourier Transform Spectroscopy And Partial Least Square Regression Coefficient, Ngesa Ezekiel Mushi Dr
Tanzania Journal of Engineering and Technology (TJET)
Keratin and cellulose are important nano components with excellent mechanical and biological properties. However, the preparation route through dissolution in organic solvents to make manmade materials is challenging because of their intensive bonding interaction characteristics. Structural modification of the natural attributes is difficult to maintain after polymer regeneration. A new technique by a green route was devised to dissolve keratin from wool, hair, and feather with cellulose in situ using 1-Butyl-3-methylimidazolium chloride [BMIm] + Cl- ionic liquid as a solvent. The mixture of keratin and cellulose homogeneously and synergistically resulted in a supramolecular composite film through non-derivatized mechanochemical interactions. The …
Development Opportunities And Technical Challenges Of Industrialization For Hydrogen Production From Bio-Ethanol Reforming, Xue Han, Hong He, Guojun Yue, Hailong Lin, Jinsong Liu, Bin Yu
Development Opportunities And Technical Challenges Of Industrialization For Hydrogen Production From Bio-Ethanol Reforming, Xue Han, Hong He, Guojun Yue, Hailong Lin, Jinsong Liu, Bin Yu
Bulletin of Chinese Academy of Sciences (Chinese Version)
Bio-ethanol reforming for hydrogen production, using renewable raw materials and adopting mature and efficient chemical processes, is an important source of green hydrogen supply to achieve the goals of carbon peaking and carbon neutrality. Bio-ethanol is a widely used substitute for fossil fuels. With the continuous progress of cellulosic ethanol technology in recent years, bio-ethanol will gradually break through the constraints of starch-based raw material supply. Based on the industrialization achievements of hydrogen production and bio-ethanol, bio-ethanol reforming can realize a rapid linkage with the existing hydrogen energy industry. However, the existence of a carbon-carbon signal bond in ethanol poses …
Design And Implementation Of Cardiopulmonary Resuscitation Simulation Model, Mbazingwa Mkiramweni
Design And Implementation Of Cardiopulmonary Resuscitation Simulation Model, Mbazingwa Mkiramweni
Tanzania Journal of Engineering and Technology (TJET)
Cardiopulmonary resuscitation (CPR) is a life-saving procedure that can multiply a person's chances of survival after a cardiac arrest. The effectiveness of CPR procedures is heavily influenced by the individual skills of the rescuer providing assistance. Chest compressions delivered at an appropriate depth and rate, allowing full chest recoil and with minimal interruptions, are critical for improving cardiac arrest survival. The lack of quality CPR training models in developing countries has a significant impact on the quality of CPR training and skills acquired. Therefore, in this paper, we aim at improving CPR training by designing a high-fidelity CPR training manikin. …
Determination Of Effectiveness Of Combined Biological And Physicochemical Treatment Of Vinasse, Mahir Mohammed Said
Determination Of Effectiveness Of Combined Biological And Physicochemical Treatment Of Vinasse, Mahir Mohammed Said
Tanzania Journal of Engineering and Technology (TJET)
Combined biological and Physicochemical treatment method was used to treat vinasse using microorganisms (Aspergillus niger (fungi) and Bacillus subtilis (bacteria)), coagulants (aluminium sulphate (Al2(SO4)3) and iron III chlorides (FeCl3)) and followed by filtration. Three factors; coagulant type, type of microorganism and coagulant concentration was analysed using full factorial design (2n) with replication, on their percentage removal of Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Total Suspended Solids (TSS) and turbidity. Pareto chart and regression analysis with a 95% confidence interval (5% significant level) were used to analyse the results using MINITAB 22 (current version). Initially, the vinasse had (COD), …
A Robust Random Forest Prediction Model For Mother-To-Child Hiv Transmission Based On Individual Medical History, Rebecca Chaula
A Robust Random Forest Prediction Model For Mother-To-Child Hiv Transmission Based On Individual Medical History, Rebecca Chaula
Tanzania Journal of Engineering and Technology (TJET)
Human Immunodeficiency Virus (HIV) continues to be a leading cause of mortality and reduces manpower throughout the world. HIV transmission from mother to child is still a global challenge in health research. According to UNAIDS, in every 7 girls, 6 are found to be newly infected among adolescents whereby 15-24 years are likely to be living with HIV which is the maternal age and likely to transfer to the child. Machine learning methods have been used to predict HIV/AIDS transmission from mother to child but left behind some important considerations including the use of patient-level information and techniques in balancing …
Continuous Liquid-Liquid Extraction Of Lomustine Synthesis, Devna Grover
Continuous Liquid-Liquid Extraction Of Lomustine Synthesis, Devna Grover
The Journal of Purdue Undergraduate Research
No abstract provided.
Rheological Properties Of Aged Crude Hard Wood Pyrolysis Oil, Divina D. Kaombe
Rheological Properties Of Aged Crude Hard Wood Pyrolysis Oil, Divina D. Kaombe
Tanzania Journal of Engineering and Technology (TJET)
Upon storage of the pyrolysis oil, aging reactions may initiate phase separation and change of the rheological properties. These changes lead to unfavourable fuel characteristics in handling, transportation and applications. Efforts have been made for alleviation including methods on how to avoid these aging effects and development of equipment capable of handling aged pyrolysis liquids with unfavourable fuel characteristics. Therefore, the aim of this study was to explore the rheological properties of phase separated pyrolysis liquid fuel. Two batches of a well – stored poplar wood pyrolysis oils were used for the investigation; one batch was diluted with water to …
Physical And Chemical Properties, Elemental Composition And Microbiological Purity Of Oil Extract Of Chamomile Flowers In Bitter Almond Oil, Khakim Tukhtaev, Sevara Khazratkulova
Physical And Chemical Properties, Elemental Composition And Microbiological Purity Of Oil Extract Of Chamomile Flowers In Bitter Almond Oil, Khakim Tukhtaev, Sevara Khazratkulova
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the study was to obtain an oil extract with the participation of chamomile officinalis (Matrigaria Recutito) grown in the Tashkent region using bitter almond oil (Amygdalus communis L.). Its chromatographic and elemental analyzes have been carried out, its microbiological purity and physicochemical constants have been determined. For extraction, we used bitter almond oil obtained by cold pressing. Extraction of chamomile flowers in bitter almond oil was carried out by maceration in the ratio of raw material: solvent (1:10). Analysis of fatty acids in the fatty extract was carried out chromatographically. The fatty extract was found to contain …
Obtaining Of Bacterial Polysaccharides, Kulonov Abdulaziz, Mirzarakhmetova Dilbar, Turaeva Nigora
Obtaining Of Bacterial Polysaccharides, Kulonov Abdulaziz, Mirzarakhmetova Dilbar, Turaeva Nigora
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of this work was to develop a technology for obtaining bacterial exopolysaccharides. The problem was solved by using the bacterial strain Halovibrio variabilis UzAS3 as a polysaccharide producer. The optimal parameters of bacterial cultivation have been determined. A technological scheme for obtaining bacterial polysaccharides has been developed, which includes such stages as the cultivation of bacteria, the separation of bacterial biomass from the culture liquid, desalting, precipitation, washing and drying. The obtained results show that bacteria have a high potential for the yield of bacterial exopolysaccharides (7.1-9.5 mg/ml).