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Microcrystalline Cellulose from Jute Fiber: A Bright Prospect for Pharmaceutical Industry 黄麻纤维微晶纤维素:制药工业的光明前景
Pub Date : 2022-08-16 DOI: 10.36348/sijcms.2022.v05i06.003
M. N. Islam, S. Hossain, A. Khatton, M. Rahman, J. Sarker, H. A. Sikder, A. Chowdhury
Synthesis of microcrystalline cellulose (MCC) from jute sticks has been studied and reported in this work. The successful removal of lignin and hemi-cellulose has been confirmed through Fourier Transform Infrared (FTIR) spectroscopic technique. X-ray Diffraction (XRD) technique has been used to measure the crystal size and crystallinity index. The FTIR analysis revealed that the acid hydrolysis had an effect on the crystalline of the fibre; however it did not influence the chemical components of the fibres. Pharmaceutical standard tests were done. Higher concentration of sodium chlorite produces minimum particle size and the effective thermal degradation occurs at 340 °C.
本文研究并报道了以黄麻为原料合成微晶纤维素的方法。通过傅里叶变换红外光谱技术证实了木质素和半纤维素的成功脱除。采用x射线衍射(XRD)技术测定了晶体尺寸和结晶度指数。FTIR分析表明,酸水解对纤维结晶有影响;然而,它并没有影响纤维的化学成分。进行了药物标准试验。较高浓度的亚氯酸钠产生最小粒径,在340℃时发生有效热降解。
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引用次数: 1
Physicochemical Parameters and Antibacterial Activity of Biosynthesized Silver Nanoparticles from Carica papaya Leaf Extract 番木瓜叶提取物生物合成纳米银的理化参数及抗菌活性研究
Pub Date : 2022-08-16 DOI: 10.36348/sijcms.2022.v05i06.004
Mela Yoro, J. Samson, J. Joshua, Patrick Datheh Bello, Joyous Wilson Kitime Jonah
In this research work, Silver nanoparticles were synthesized from Carica papaya leaf extract via green route. The physicochemical parameters including boiling point, color, odor, density, pH as well as the solubility of papaya leaf extract were first determined before proceeding with the synthesis of silver nanoparticles. The formation of Silver Nanoparticles first, was identified by color change from light brown to dark brown after the nucleation of the metal ions indicating that phytoconstituents of Carica papaya resulted in the reduction of Ag+ to Ag0, a phenomenon that could be attributed to the surface Plasmon absorption. The bio fabricated silver nanoparticles were characterized using UV – Visible and SEM to be certain of its formation before being deployed in the antibacterial studies. The UV-Vis spectral analysis showed maximum absorbance of 1.05 at a corresponding wavelength (λ max) of 400nm reflecting the surface Plasmon resonance of silver NPs from papaya leaves which is characteristic of Silver Nanoparticles. SEM image revealed that, the synthesized silver nanoparticles have a spinel like structure and an average size of about 50nm. The antibacterial studies of Silver nanoparticles were conducted against B. subtilis, K. pneunoniae, P. aeruginosa, E. coli, and S. typhi. Different concentrations of 100, 200, 300, 400 and 500μg/L of Silver nanoparticles were tested against each pathogen. The inhibition zone increases generally with increase in concentrations of silver nanoparticles. At higher concentration of 500μg/L, the zones of inhibition were in the following order; 24.44mm, 17.64mm, 17.52mm, 16.88mm, and 16.00mm for B. subtilis, P. aeruginosa, E. coli, K. pneumoniae and S. typhi respectively. The zone of inhibition for Augmentin was found to be higher compared to silver nanoparticles for each pathogen, except for P. aeruginosa where it is almost the same, an indication of high activity of silver nanoparticles against P. aeruginosa due to the comparability with Augmentin. For each concentration investigated, B. subtilis demonstrated higher zone of inhibition as compared to other pathogens studied in this work, hence, Ag NPs may be a potential antibiotic.
本研究以番木瓜叶提取物为原料,通过绿色途径合成银纳米粒子。首先测定木瓜叶提取物的沸点、颜色、气味、密度、pH值以及溶解度等理化参数,然后进行纳米银的合成。银纳米粒子首先形成,金属离子成核后颜色由浅棕色变为深棕色,表明番木瓜的植物成分导致Ag+还原为Ag0,这一现象可能归因于表面等离子体激元吸收。利用紫外-可见和扫描电镜对生物制备的纳米银进行了表征,以确定其在抗菌研究中的形成。紫外可见光谱分析表明,在400nm波长处的最大吸光度为1.05,反映了木瓜叶中银纳米粒子的表面等离子体共振特征。SEM图像显示,合成的银纳米颗粒具有尖晶石状结构,平均尺寸约为50nm。研究了银纳米颗粒对枯草芽孢杆菌、肺炎克雷伯菌、铜绿假单胞菌、大肠杆菌和伤寒沙门氏菌的抑菌作用。分别以100、200、300、400、500μg/L不同浓度的银纳米颗粒对各病原菌进行抑菌试验。抑制带一般随纳米银浓度的增加而增大。在较高浓度500μg/L时,抑菌区依次为:枯草芽孢杆菌、铜绿假单胞菌、大肠杆菌、肺炎克雷伯菌和伤寒沙门氏菌分别为24.44mm、17.64mm、17.52mm、16.88mm和16.00mm。研究发现,除了铜绿假单胞菌外,对Augmentin的抑制区比银纳米粒子对每种病原体的抑制区都要高,这表明银纳米粒子对铜绿假单胞菌的抑制活性高,这是由于与Augmentin的可比性。对于每种浓度的研究,枯草芽孢杆菌都表现出比其他病原体更高的抑制区,因此,Ag NPs可能是一种潜在的抗生素。
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引用次数: 2
Heavy Metal Content of Some Selected Shellfish from Oil Producing Communities in Bayelsa State, Nigeria 尼日利亚巴耶尔萨州产油社区某些选定贝类的重金属含量
Pub Date : 2022-08-10 DOI: 10.36348/sijcms.2022.v05i06.002
J. T, O. A, P. C., I. D.
The level of heavy metals in marine ecosystem has been intensively studied during recent years as these hazardous substances could be accumulated in the biota. Generally, the presence of contaminants in shellfish is as a result of human activities such as industrial, agricultural wastes, crude oil exploration and spillage and this has pose a significant threat to humans’ health and other animals feeding on them over the years. In this study, some heavy metals levels in shellfishes sourced from the rivers of Otuoke community in Ogbia local Government Area, Oporoma community in Ekeremor Local Government Area and Sangana community in Brass Local Government Area, all in Bayelsa state, were investigated and the samples were prepared according to Food and Agricultural Organization of United Nation FAO (1994) standard test methods. The total mean of cadmium, Lead, and mercury ranges between 0.00mg/g to 0.002mg/g in periwinkle, prawn and oyster gotten from the three communities and was compared with the WHO acceptable limit of 0.5mg/kg – 1.0mg/kg. This could have been due to increased rainfall during the period of this study which in turn increase water levels and hence reduced or dilute the heavy metal concentration and thus less risk of bioaccumulation or possibly that the oil producing communities from where the shellfish where obtained might have possibly be link to lack of cases of oil spillage over a recent past before the commencement of the study. This study therefore advocates that periwinkle, prawn and oyster which are shellfishes used for this study from the rivers in these communities are safe for human consumption with respect to heavy metals load especially within the raining season when this study was conducted.
重金属在海洋生态系统中的含量是近年来研究的热点,因为这些有害物质会在生物群中积累。一般来说,贝类中污染物的存在是工业、农业废物、原油勘探和泄漏等人类活动的结果,多年来,这对人类健康和以贝类为食的其他动物构成了重大威胁。本研究对来自巴耶尔萨州Ogbia地方政府区Otuoke社区、Ekeremor地方政府区Oporoma社区和Brass地方政府区Sangana社区河流的贝类进行了重金属含量调查,并根据联合国粮食及农业组织FAO(1994)的标准检测方法进行了样品制备。从三个社区获得的紫花螺、对虾和牡蛎中镉、铅和汞的总平均值在0.00mg/g至0.002mg/g之间,并与世界卫生组织可接受限值0.5mg/kg至1.0mg/kg进行了比较。这可能是由于在本研究期间降雨量增加,这反过来又增加了水位,从而减少或稀释了重金属浓度,从而减少了生物积累的风险,或者可能是在研究开始之前的最近一段时间里,获得贝类的产油社区可能与石油泄漏事件的减少有关。因此,本研究主张,研究中使用的贝类,即来自这些社区河流的紫花螺、对虾和牡蛎,就重金属负荷而言,对人类食用是安全的,特别是在本研究进行时的雨季。
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引用次数: 0
NMR Susceptibility and Magnetization of DNA Bases, Nucleotides and Their Derivatives with C2Fe+, A DFT Study DNA碱基、核苷酸及其衍生物与C2Fe+的核磁共振磁化率和磁化强度的DFT研究
Pub Date : 2022-08-03 DOI: 10.36348/sijcms.2022.v05i06.001
Leila Hojatkashani̇, Amir Ali Omi̇di̇
DNA strands and their bases are in the cells in every creature. They essential for growth, metabolism regulation and carrying genetic information bases to new generations. The bases of DNA are working with 0 and 1 system. In this theoretical research, first, by using Gaussian program, NMR susceptibility of DNA bases and their C2Fe+ attached varieties are determined. In the next step, with effect of magnetic field (H) and NMR susceptibility of these compounds, their resulted Magnetization (M) is calculated. These resulted magnetizations not only can be considered as a method to make a new (0) and (1) system for DNA bases but also can be used as creating certain signals to mark of DNA bases and their compounds which are attached to C2Fe+.
DNA链及其碱基存在于每个生物的细胞中。它们对生长、代谢调节和将遗传信息基础传递给下一代至关重要。DNA的碱基与0和1系统一起工作。在本理论研究中,首先利用高斯程序测定了DNA碱基及其C2Fe+附着品种的核磁共振敏感性。在磁场(H)和这些化合物的核磁共振磁化率的影响下,计算它们的磁化强度(M)。这些结果不仅可以被认为是一种为DNA碱基制造新的(0)和(1)体系的方法,而且可以用来产生某些信号来标记附着在C2Fe+上的DNA碱基及其化合物。
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引用次数: 0
Green Synthesis, Characterization and Antibacterial Activity of Cobalt Nanoparticles from Parkia biglobosa Aqueous Stem Extract 绿色合成、表征及其抗菌活性研究
Pub Date : 2022-07-21 DOI: 10.36348/sijcms.2022.v05i05.003
Mela Yoro, J. Joshua, Ayuba Isiyaku, Joyous Wilson Kitime Jonah, Patrick Datheh Bello
In this research article, Cobalt nanoparticles were green synthesized, Characterized and applied in antimicrobial study of some selected pathogens. The formation of cobalt nanoparticles was confirmed by first, its colour change from light brown to dark brown within 10 minutes. From the UV-Vis spectral analysis, it was observed that highest absorption peak appeared at 400nm reflecting the surface Plasmon resonance of Cobalt NPs from Parkia biglobosa stem which is characteristic of Cobalt Nanoparticles. From the FT-IR studies, the absorption peaks were seen at 3787.71 cm-1, 3660.31 cm-1, 3436.44 cm-1, 1638.75 cm-1, 1384.50 cm-1, 1090.80 cm-1and 798 cm-1. Investigation revealed a medium sharp peak absorption at 1090.80 cm-1which may be attributed to the stretching of aliphatic hydrocarbon (C–H). A peak at 1384.50 cm-1corresponds to C=C stretching while the absorption bands at 1638.75 cm-1and 3436.44 cm-1may be assigned to N-H and O-H stretching vibration modes respectively. Similarly, peaks were seen at 3787.71 cm-1 and 3660.31 cm-1 corresponding to O-H belonging to water and alcohol respectively. Furthermore, the very strong band at 798 cm-1emanates from C-O-C symmetric stretching and C-O-H bending vibrations of protein in the Cobalt nanoparticles. The surface morphology of the bio fabricated Cobalt nanoparticles, has revealed by SEM image, is spherical in shape having smooth surface and well dispersed with close compact arrangement. From the microbial study carried out, the surfaces of the cobalt nanoparticles might have interacted directly with the bacterial outer membrane, causing the membrane to rupture thereby killing the microbes. The antibacterial activity demonstrated by the cobalt nanoparticles in this study could be attributed to their small size and high surface to volume ratio, which therefore enables them to interact closely with bacterial membranes. From the minimum inhibitory concentration (MIC) study conducted, it showed clearly that the green synthesized cobalt nanoparticles inhibited the growth of the pathogens investigated.
本文对钴纳米颗粒进行了绿色合成、表征并应用于部分病原菌的抗菌研究。首先证实了钴纳米颗粒的形成,其颜色在10分钟内由浅棕色变为深棕色。紫外可见光谱分析发现,在400nm处出现了最高的吸收峰,反映了钴纳米粒子的表面等离子体共振特征。FT-IR研究发现,吸收峰分别位于3787.71 cm-1、3660.31 cm-1、3436.44 cm-1、1638.75 cm-1、1384.50 cm-1、1090.80 cm-1和798 cm-1。在1090.80 cm-1处有一个中等尖锐的吸收峰,这可能是由于脂肪烃(C-H)的拉伸。1384.50 cm-1处的吸收峰对应于C=C拉伸,1638.75 cm-1和3436.44 cm-1处的吸收峰分别属于N-H和O-H拉伸振动模式。同样,O-H分别位于3787.71 cm-1和3660.31 cm-1,对应于水和醇。此外,798 cm-1处的强谱带是由钴纳米颗粒中蛋白质的C-O-C对称拉伸和C-O-H弯曲振动产生的。SEM图像显示,生物制备的钴纳米颗粒表面形貌为球形,表面光滑,分散良好,排列紧密。从所进行的微生物研究来看,钴纳米颗粒的表面可能直接与细菌的外膜相互作用,导致膜破裂,从而杀死微生物。本研究中钴纳米颗粒所表现出的抗菌活性可能归因于它们的小尺寸和高表面体积比,因此使它们能够与细菌膜密切相互作用。从最小抑制浓度(MIC)研究中可以清楚地看到,绿色合成的钴纳米颗粒抑制了所研究病原体的生长。
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引用次数: 0
Development of Fire Retardant on Jute by Chemical Means 化学方法开发黄麻阻燃剂
Pub Date : 2022-07-19 DOI: 10.36348/sijcms.2022.v05i05.001
M.N. Islam, M. Hussain, A. Khatton, J. Sarker, H. A. Sikder, A. Chowdhury
Jute is highly flammable in character. Due to its high degree of flammability, the versatile use of this fibre is handicapped to some extent, particularly in some specific purpose where jute products with flame resistance finishes and demanded. Considering this disadvantage, a research project was undertaken to make this fibre flameproof and therefore safer in specialized textile uses. The study was performed using yarn and fabrics which were desized with diastase and lissapol-N. Yarn and fabrics were scoured with sodium carbonate, sodium hydroxide under some standard conditions. These pretreated yarns and fabrics were used in the whole experimental work. The treated yarns were tested for flame retardant by subjecting them to the luminous flame of Bunsen burner and by observing the time of flaming (after flame) and time of glowing (flameless combustion, after glow), if any Percentage losses of strength of the treated yarn and fabrics were also measured by standard method. Different solutions of fire resistant chemicals were prepared to change the chemical, concentration and pH ratio of the solution. Jute fabrics and yarns treated with 65% solution of urea and ammonium dihydrogen phosphate (the ratio of urea and ADP being 3:2) together with 2% Turpex NP and 3-6% perapret PE-40% were found durably flame retardant causing minimum loss of the strength. This research was focused on fire resistant treatment of jute yarn and fabrics with different chemicals to make jute products for diversified textile uses.
黄麻的性质是高度易燃的。由于其高度可燃性,这种纤维的多用途使用在某种程度上受到阻碍,特别是在一些特定用途中,要求黄麻制品具有阻燃性。考虑到这一缺点,我们开展了一项研究项目,使这种纤维具有阻燃性,因此在特殊纺织用途中更安全。采用淀粉酶和利萨波尔- n为浆料的纱线和织物进行了研究。在一定的标准条件下,用碳酸钠、氢氧化钠对纱线和织物进行洗涤。这些经过预处理的纱线和织物用于整个实验工作。将处理后的纱线置于本生灯的发光火焰中,观察燃烧时间(燃烧后)和发光时间(无焰燃烧,发光后),并通过标准方法测量处理后的纱线和织物的强度损失百分比。制备了不同的阻燃剂溶液,改变了溶液的化学成分、浓度和pH比。用65%的尿素和磷酸二氢铵溶液(尿素与ADP的比例为3:2)、2%的Turpex NP和3-6%的perapret PE-40%对黄麻织物和纱线进行阻燃处理,强度损失最小。研究了用不同的化学药剂对黄麻纱线和织物进行阻燃处理,使黄麻制品具有多种纺织用途。
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引用次数: 0
Production of High Yield Pulp and Paper from Jute Fibre in Bangladesh: A Comparison with Other Crop Residues 孟加拉国利用黄麻纤维生产高产纸浆和纸张:与其他作物残茬的比较
Pub Date : 2022-07-19 DOI: 10.36348/sijcms.2022.v05i05.002
H. A. Sikder, A. Kabir, A. Chowdhury, M. N. Islam, A. Khatton, J. Sarker, S. Hossain
As the allocated forestland for pulp and paper production in Bangladesh is very limited and a substantial amount of crops residues are generated each year, the latter can substitute for pulp and paper production. In this context, eight residues of crops produced in Bangladesh were evaluated. Final pulp yields were 40 -65% with the kappa number of 11-32% depending on crops residues. The experimental processes are outlined. The physico-mechanical properties of handmade papers are estimated by standard procedure. Gram per Square Metre (GSM), brightness percentage, thickness and tearing strength of different handmade paper sheets shows acceptable papermaking properties. FT-IR analysis were carried out for identifying types of chemicals bonds (functional groups).The study indicates that these hand-made papers can be used for making eco-friendly paper bags, packaging material which will be suitable alternative to the non-biodegradable plastic, a cause of ecological and environmental pollution.
由于孟加拉国分配给纸浆和纸张生产的林地非常有限,每年产生大量的作物残茬,后者可以替代纸浆和纸张生产。在这方面,对孟加拉国生产的八种作物残留物进行了评价。最终纸浆得率为40 ~ 65%,kappa值为11 ~ 32%。概述了实验过程。手工纸的物理机械性能是用标准程序来估计的。克每平方米(GSM),亮度百分比,厚度和撕裂强度不同的手工纸张显示可接受的造纸性能。FT-IR分析用于确定化学键(官能团)的类型。研究表明,这些手工纸可以用来制作环保纸袋,这是一种合适的包装材料,可以替代造成生态和环境污染的不可生物降解塑料。
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引用次数: 0
Phytochemical Investigation and Determination of Antibacterial Activities of the Fruit and Leaf Crude Extract of Ficus palmata 棕榈榕果叶粗提物的植物化学研究及抑菌活性测定
Pub Date : 2022-05-26 DOI: 10.36348/sijcms.2022.v05i04.002
Shashe Kassaw, Addisu Tamir, Biruk Bezabeh Yimam
To cure ailments, the global population makes medicines from plants. Ficus palmata can be used to cure a variety of ailments. The purpose of this study was to examine the phytochemical content and antibacterial activity of methanol extract from Ficus palmata fruit and leaf crude extract. Maceration was used to make the methanol extracts, which were subsequently fractionated. The crude extracts and fractions were subjected to standard phytochemical screening assays. Phytochemical screening revealed the presence of flavonoids, alkaloids, saponins, tannins, polyphenols, anthraquinones, steroids, coumarins, and terpenoids in the crude methanol fruit extract. Phytochemical screening revealed the presence of flavonoids, alkaloids, tannins, polyphenols, anthraquinones, steroids, and terpenoids in the extract. The determination of trace metals in leaves and fruit samples using a flame atomic absorption spectrophotometer revealed that the fruits contained relatively high quantities of iron and other nutritionally essential elements, such as magnesium, calcium, and copper, whereas the leaves contain a high level of calcium, magnesium, and iron, as well as a small amount of copper.
为了治病,全世界的人都从植物中提取药物。棕榈榕可用于治疗多种疾病。研究了棕榈榕果实和叶片粗提物甲醇提取物的植物化学成分和抑菌活性。用浸渍法制备甲醇提取物,然后进行分馏。粗提取物和馏分进行标准的植物化学筛选试验。植物化学筛选结果显示,甲醇果粗提取物中含有黄酮类、生物碱、皂苷、单宁、多酚、蒽醌、类固醇、香豆素和萜类化合物。植物化学筛选显示,提取物中含有黄酮类、生物碱、单宁、多酚、蒽醌、类固醇和萜类化合物。利用火焰原子吸收分光光度计对叶子和水果样品中的微量金属进行测定,结果表明,水果含有相对较高的铁和其他营养必需元素,如镁、钙和铜,而叶子含有高水平的钙、镁和铁,以及少量的铜。
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引用次数: 1
Comparison of Antioxidant, Flavonoid and Polyphenol Content of Three Selected Solanaceae Genera from Kigezi, Southwest Uganda 乌干达西南部Kigezi茄科3个属植物抗氧化剂、类黄酮和多酚含量的比较
Pub Date : 2022-05-18 DOI: 10.36348/sijcms.2022.v05i04.001
Mukasa-Tebandeke, I. Z, K. I, S. J, Wasajja, H. Z, Nankinga, R. M
Solanaceae is family of plants widely used in food, sauce and herbal medicine because its members are rich in carbohydrates, proteins, fats, vitamins, mineral salts and other trace and essential nutrients like phenols and flavonoids that retard degenerative diseases and stress. Knowledge on purposeful use of solanaceae in food and medicine in Uganda is low. Aqueous extracts of dry leaves of three selected solanum genera growing in Kabale were compared for their polyphenol and flavonoid contents and antioxidant properties. Total polyphenol (TPC) and total flavonoid (TFC) contents were determined by the Folin-Ciocalteu and aluminium chloride colorimetric methods respectively. Antioxidant properties and radical scavenging were determined using DPPH, hydrogen peroxide, thiocyanate-iron (III) complex and iron (II)/(III)-linoleic acid systems. The polyphenol content of dry leaves of S. anguivi was 1750 ± 0.70, that for S. macrocarpon was 104 ± 0.45 and S. nigrum was 97.80 ± 0.15 GAE/g yet the flavonoid content was 7.40 ± 0.30, 35.00 ± 0.60 and 16.40 ± 0.40 mg/QE/g for S. anguivi, S. macrocarpon and S. nigrum respectively. The DPPH scavenging at IC50 were 7.80 ± 0.25; 45.60 ± 0.30 and 42.90 ± 0.20 respectively yet hydrogen peroxide scavenging at IC50 stood at 6.89 ± 0.15; 27.00 ± 0.35 and 17 .90 ± 0.20 μg/mL in the respective order for S. anguivi, S. macrocarpon and S. nigrum. The available data suggests the plants are very good food supplements of high nutritive and chemotherapeutic values. However, there is need to perform in vivo and vitro experiments to deduce their efficacy on mammals.
茄科植物广泛用于食品、酱料和草药,因为其成员富含碳水化合物、蛋白质、脂肪、维生素、矿物质盐和其他微量和必需营养素,如酚类和类黄酮,可以延缓退行性疾病和压力。在乌干达,人们对茄科植物在食品和药品中有目的地使用的了解很少。对生长在Kabale地区的3种茄属植物干叶水提物的多酚、类黄酮含量和抗氧化性能进行了比较。采用福林比色法和氯化铝比色法分别测定总多酚(TPC)和总黄酮(TFC)含量。采用DPPH、过氧化氢、硫氰酸-铁(III)配合物和铁(II)/(III)-亚油酸体系测定了抗氧化性能和自由基清除能力。山楂干叶多酚含量分别为1750±0.70、104±0.45和97.80±0.15 GAE/g,黄酮类含量分别为7.40±0.30、35.00±0.60和16.40±0.40 mg/QE/g。IC50时DPPH清除率为7.80±0.25;过氧化氢的IC50清除率为6.89±0.15,分别为45.60±0.30和42.90±0.20;安吉维S. anguivi、大碳S. macrocaron和黑棘S. nigrum的含量分别为27.00±0.35和17.90±0.20 μg/mL。现有数据表明,这些植物是非常好的食物补充剂,具有很高的营养和化疗价值。然而,需要进行体内和体外实验来推断其对哺乳动物的功效。
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引用次数: 0
Synthesis and Characterization of Activated Carbon Prepared from Jute Stick Charcoal for Industrial Uses 工业用黄麻炭制备活性炭的合成与表征
Pub Date : 2022-03-30 DOI: 10.36348/sijcms.2022.v05i03.003
M. N. Islam, J. Sarker, A. Khatton, S. Hossain, H. A. Sikder, R. Ahmed, A. Chowdhury
Activated Carbons (ACs) were prepared from jute stick charcoal by chemical activation using H2SO4 and H3PO4 ranging temperature from 3000C to 3500. The activated carbons and charcoal prepared from jute sticks were characterized by evaluating the surface chemistry, structural features and surface morphology. The properties of the carbons were characterized by Scanning Electron Microscope (SEM), Brunauer – Emmett-Teller (BET), X-Ray Diffraction (XRD) and the FT-IR method. The jute sticks were converted to activated carbons with the highest surface area (135–245m2/g) and largest mesopores volume (0.14–0.16 cm3/g). The FT-IR spectra exhibited that the pyrolysis of jute stick resulted in the release of aliphatic and O - containing functional groups by thermal effect. However, the release of functional groups is effect of chemical reaction in the ZnCl2, H3PO4, and H2SO4 activation process. A honeycomb carbon structure in activated carbon was formed as observed on SEM images. Although charcoal and activated carbon were prepared at 3000C to 3500, the activated carbon exhibited much lower Raman sensitivity due to the formation of condensed aromatic ring systems. Due to high surface area and high porous structure with abundance of functional groups, the activated carbon prepared from jute sticks charcoal absorbed molecules with much higher than those of other activated carbon.
以黄麻炭为原料,在3000 ~ 3500℃的温度下,用H2SO4和H3PO4进行化学活化,制备了活性炭。以黄麻为原料制备活性炭和活性炭,对其表面化学、结构特征和表面形貌进行了表征。采用扫描电镜(SEM)、布鲁诺尔-埃米特-泰勒(BET)、x射线衍射(XRD)和傅里叶变换红外光谱(FT-IR)对碳的性质进行了表征。得到的活性炭比表面积最高(135 ~ 245m2/g),介孔体积最大(0.14 ~ 0.16 cm3/g)。红外光谱分析表明,黄麻热解过程中由于热效应导致脂肪族官能团和含氧官能团释放。而官能团的释放是在ZnCl2、H3PO4和H2SO4活化过程中化学反应的结果。扫描电镜(SEM)观察到活性炭中形成了蜂窝碳结构。虽然活性炭和活性炭在3000 ~ 3500℃的温度下制备,但活性炭由于形成了缩合芳环体系而表现出较低的拉曼灵敏度。黄麻炭制备的活性炭具有比表面积大、多孔结构高、官能团丰富等特点,吸附分子量远高于其他活性炭。
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引用次数: 0
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Scholars International Journal of Chemistry and Material Sciences
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