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EFFECT OF MICROWAVE IRRADIATION TIME TO DEACETYLATION PROCESS OF CHITIN FROM SHRIMP SHELLS 微波辐照时间对虾壳甲壳素脱乙酰化过程的影响
Pub Date : 2023-06-13 DOI: 10.20473/jkr.v8i1.40222
Arief Adhiksana, W. Wahyudi, Z. Arifin, M. Irwan
Microwaves have been used in various organic synthesis applications. The use of microwaves provides many advantages, including relatively short start-up and heating times, energy efficiency and process costs, easy and precise process control, selective heating, better final product quality, and improved dry material quality. Microwaves were used in this study to convert chitin into chitosan and to determine the effect of deacetylation time on the degree of deacetylation of chitosan, which was in accordance with the Indonesian National Standard (SNI 7949:2013). The chitin deacetylation process was carried out by varying the heating time to 5, 7, 11, and 15 minutes with a power of 350 W. Two grams of chitin were mixed with 40 mL of 70% NaOH solution in a beaker. The mixture was put in a microwave at a constant temperature of 70 °C. Chitosan was washed until neutral and then dried in an oven. The degree of deacetylation (DD) was analyzed using Fourier Transform Infrared (FTIR) spectroscopy. The results showed that A deacetylation degree of 79.96% was achieved at a reaction time of 15 min. The water content of chitosan was determined to be 9.15%.
微波已用于各种有机合成应用。使用微波提供了许多优点,包括相对较短的启动和加热时间,能源效率和过程成本,简单和精确的过程控制,选择性加热,更好的最终产品质量,以及改进的干燥材料质量。本研究采用微波将几丁质转化为壳聚糖,并测定脱乙酰时间对壳聚糖脱乙酰程度的影响,符合印尼国家标准(SNI 7949:2013)。在350 W的功率下,加热时间分别为5、7、11和15分钟,进行甲壳素脱乙酰化过程。2克甲壳素与40毫升70% NaOH溶液在烧杯中混合。将混合物放入恒温70℃的微波炉中。壳聚糖洗涤至中性,然后在烤箱中干燥。采用傅里叶红外光谱(FTIR)分析了脱乙酰化程度。结果表明,在15 min的反应时间内,壳聚糖的脱乙酰度为79.96%,壳聚糖的含水量为9.15%。
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引用次数: 1
SCREENING OF PIROXICAM SELF-NANOEMULSIFYING DRUG DELIVERY SYSTEM (SNEDDS) USING FRACTIONAL FACTORIAL DESIGN 采用分数因子设计筛选吡罗昔康自纳米乳化给药系统
Pub Date : 2023-06-13 DOI: 10.20473/jkr.v8i1.43803
Septiawan Adi Nugroho, I. Kuncahyo, D. Marlina
Piroxicam belongs to BCS class II and has low solubility. Self-nanoemulsifying drug delivery systems (SNEDDS) are considered a potential approach for increasing the solubility and release of piroxicam. This study aimed to select the components and component ratios of piroxicam SNEDDS using fractional factorial design 26-2 (FFD). The variables used in the DFT development of piroxicam SNEDDS are the type and concentration of oil (triacetin and oleic acid), surfactant (kolliphor EL and Tween 60), and co-surfactants (Transcutol and PEG 400). The FFD results showed 16 runs with different proportions of the piroxicam SNEDDS components, which were then characterized by critical parameters including emulsification time, %transmittance, droplet size, and drug loading. The components and component ratios of the PKM SNEDDS were determined using single-factor plot analysis. The results showed that triacetin (oil), kolliphor EL (surfactant), Transcutol (co-surfactant) had the greatest contribution to the formation of piroxicam SNEDDS with an oil ratio range of 11.11–28.57%, surfactant 44.44–77.78%, co-surfactant 11.11–44.44 %.
吡罗昔康属BCSⅱ类,溶解度低。自纳米乳化给药系统(SNEDDS)被认为是增加吡罗西康的溶解度和释放的潜在途径。本研究采用分数因子设计26-2 (FFD)筛选吡罗昔康SNEDDS的成分和成分比。吡罗西康SNEDDS的DFT开发中使用的变量是油的类型和浓度(三乙酸和油酸)、表面活性剂(kolliphor EL和Tween 60)和共表面活性剂(Transcutol和peg400)。采用不同比例的吡罗昔康SNEDDS组分进行了16趟的FFD实验,并通过乳化时间、透光率、液滴大小、载药量等关键参数对其进行了表征。采用单因素图分析确定PKM SNEDDS的组成和组成比。结果表明:三乙酸酯(油)、表面活性剂kolliphor EL、助表面活性剂Transcutol对吡罗昔康SNEDDS的形成贡献最大,油比范围为11.11 ~ 28.57%,表面活性剂44.44 ~ 77.78%,助表面活性剂11.11 ~ 44.44%;
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引用次数: 0
SYNTHESIS AND CHARACTERIZATION OF NANO CHITOSAN-AVOCADO SEED STARCH AS EDIBLE FILMS 纳米壳聚糖-鳄梨种子淀粉可食薄膜的合成与表征
Pub Date : 2023-06-13 DOI: 10.20473/jkr.v8i1.43394
Suhartini, Imas Solihat, Foliatini, S. R. Setyawati, Nurdiani, L. Sulistiawaty, Muhammad Fadhil Khoirurrizal
The use of plastic as food packaging tends to cause problems because it is difficult to decompose; therefore, it can pollute the environment. The development of biodegradable plastics is an alternative to this problem. Chitosan, a bioplastic, can be used as a packaging material but has poor barrier properties. A biodegradable film was made from a mixture of plasticizer, nano chitosan, and avocado seed starch. Nanochitosan synthesis was carried out using the UAE method for 2 h at an amplitude of 50% to produce 0.7 µm sized particles. Films were formed using the casting method, and characterization was performed, which included functional group, thickness, color, and antioxidant tests. The FTIR spectrum showed that the interaction between nanochitosan and avocado seed starch occurred physically, marked by a shift in the wavenumber of the amide carbonyl group from 1646.60 cm-1 1549.99 cm-1. The film thickness was 0.10–0.15 cm with a darker color as the volume of nanochitosan used increased. Antioxidant analysis revealed that the LC50 value was between 150-250 ppm. The barrier properties of the resulting film against water vapor can inhibit strawberry fruit decay for 3–4 days at room temperature.
使用塑料作为食品包装往往会产生问题,因为它很难分解;因此,它会污染环境。生物可降解塑料的发展是解决这一问题的另一种选择。壳聚糖是一种生物塑料,可作为包装材料,但其阻隔性能较差。以增塑剂、纳米壳聚糖和鳄梨种子淀粉为原料制备了一种生物可降解薄膜。采用UAE法合成纳米壳聚糖,振幅为50%,反应2 h,可制得0.7µm大小的纳米壳聚糖颗粒。采用浇铸法形成薄膜,并进行表征,包括官能团、厚度、颜色和抗氧化性测试。FTIR光谱表明,纳米壳聚糖与鳄梨种子淀粉发生了物理相互作用,酰胺羰基的波数从1646.60 cm-1转变为1549.99 cm-1。随着纳米壳聚糖用量的增加,膜的厚度为0.10 ~ 0.15 cm,颜色越深。抗氧化分析显示LC50值在150 ~ 250 ppm之间。所得到的薄膜对水蒸气的阻隔性能可以在室温下抑制草莓果实腐烂3-4天。
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引用次数: 0
Antibacterial Edible Coating from Mandarin Orange Peel (Citrus reticulata) and Moringa Leaf (Moringa oleifera) Extract for Fish Preservation 柑桔皮和辣木叶提取物用于鱼类保鲜的可食用抗菌涂层
Pub Date : 2023-03-24 DOI: 10.25077/jrk.v14i1.563
M. Firdaus, Desy Nila Rahmana, Diah Fitri Carolina, N. Firdausi, Zulfaa Afiifah, Berlian Ayu Rismawati Sugiarto
Approximately 10% of total fish production is wasted due to decomposition. Excessive formalin use in fish preservation can be potentially lethal. One of the natural preservatives is edible coating, which can be prepared from natural ingredients such as mandarin orange peel (Citrus reticulata) pectin and Moringa leaves (Moringa oleifera) which contain antibacterial compounds. The purpose of this research was to examine the antibacterial influence of edible coatings made from pectin of mandarin orange peel with the addition of Moringa leaf extract and to determine its effect on the freshness of nile tilapia (Oreochromis niloticus). Moringa leaf extraction was performed using the Soxhlet extraction method with 96% ethanol at 60–80 °C, while the mandarin orange peel was isolated by reflux using 1% HCl with a pH of 1.5 for 4 hours at 90 °C. Edible coating was synthesized from mandarin orange peel pectin and carboxymethyl cellulose (CMC) which was homogenized with distilled water, and glycerol was added as a plasticizer. Edible coatings were prepared with various concentrations of 0%, 50%, and 100% Moringa leaf extract. Nile tilapia with the addition of edible coatings experienced slower decay, especially in the variations of 100% Moringa leaf extract. This was evidenced by the quantitative test through the Total Plate Count (TPC) test which still did not exceed the limit of >5.6 log CFU/g.
由于分解,大约10%的鱼类总产量被浪费。在鱼类保存过程中过量使用福尔马林可能具有潜在的致命性。其中一种天然防腐剂是可食用涂层,它可以由含有抗菌化合物的天然成分制成,如橘子皮(Citrus reticulata)果胶和辣木叶(Moringa oleifera)。本研究考察了添加辣木叶提取物的柑桔皮果胶可食性涂料的抑菌效果,并确定其对尼罗罗非鱼(Oreochromis niloticus)鲜度的影响。辣木叶提取采用索氏提取法,96%乙醇,60-80℃;柑桔皮提取采用1%盐酸回流,pH = 1.5, 90℃,回流4小时。以桔皮果胶和羧甲基纤维素(CMC)为原料,加入甘油作为增塑剂,经蒸馏水均质,合成了食用涂料。用不同浓度的0%、50%和100%辣木叶提取物制备可食用涂层。添加可食用涂层的尼罗罗非鱼的腐烂速度较慢,特别是在100%辣木叶提取物的变化中。通过总平板计数(TPC)测试的定量检验证明了这一点,仍然没有超过bbb5.6 log CFU/g的限值。
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引用次数: 0
Pengembangan Sensor Kimia Berbasis Kertas Untuk Penetapan Kadar Kafein Sampel Kopi 基于纸的化学传感器的开发,以确定咖啡样本的咖啡因水平
Pub Date : 2023-03-24 DOI: 10.25077/jrk.v14i1.589
Moch. Amrun Hidayat, Noviani Tri Wahyuning, Indah Yulia Ningsih, B. Kuswandi
The caffeine chemical sensor was developed by co-immobilizing sodium periodate (NaIO4), 3-methyl-2-benzothiazolinone hydrazone (MBTH), and acetic acid (CH3COOH) onto paper by using an adsorption technique. The addition of caffeine solution could change the color of the sensor from white to pale blue which can be then captured by using a flatbed scanner and quantified by the ImageJ program, known as a scanometric technique. Method validation such as linearity, LOD, LOQ, precision, and accuracy of the sensor was done by using caffeine standards. The result of caffeine analysis using the developed chemical sensor-scanometric method agreed with that of the spectrophotometric method, suggesting that the developed sensor with scanometric technique can be used as an alternative method for caffeine assay in coffee samples.
采用吸附法将高碘酸钠(NaIO4)、3-甲基-2-苯并噻唑啉酮腙(MBTH)和乙酸(CH3COOH)共固定在纸上,制备了咖啡因化学传感器。添加咖啡因溶液可以将传感器的颜色从白色变为淡蓝色,然后可以使用平板扫描仪捕获并通过ImageJ程序进行量化,称为扫描测量技术。采用咖啡因标准品对传感器的线性度、LOD、LOQ、精密度和准确度进行验证。所建立的化学传感器-扫描法测定咖啡中咖啡因的结果与分光光度法的结果一致,表明所建立的传感器-扫描法可作为咖啡样品中咖啡因测定的一种替代方法。
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引用次数: 0
Identification of Secondary Metabolites and FT-IR Analysis of Getih-Getihan Fruit Extract (Rivina humilis L.) 格提-格提汗果提取物次生代谢产物鉴定及FT-IR分析
Pub Date : 2023-03-24 DOI: 10.25077/jrk.v14i1.565
Mariyam, Yulistia Anggraini, T. Suhartati
Getih-getihan (Rivina humilis L.) plants can be used as antibacterial, antioxidant and natural pesticides. Most of the biological activities of natural products originated from secondary metabolites contained therein. Studies have shown the effects of leaves, branches, and fruits extract of R. humilis towards biological activities. However, identifying the phytochemical compounds of R. humilis L. fruit is less discussed. Here we proposed research on the identification of secondary metabolite compounds of R. humilis L. fruit extract using phytochemical screening tests and spectroscopic method. The extraction of R. humilis L. fruit was proceeded by maceration method using methanol solvent. The series of phytochemical screening tests signified the presence of alkaloids, terpenoids, tannins and flavonoids. Furthermore, we applied FT-IR analysis to confirm the existence of functional groups in the secondary metabolite compounds. A broad absorption band showed the hydroxyl groups (O-H) at 3265 cm-1. The sharp band at 1632 cm-1 exhibited the C=C stretching band. The presence of C-N (stretching) was signified by the absorption band at 1237 cm-1, while the C-H bond in CH3 terminals (alkanes, alkyl group) was exhibited at 1401 cm-1. All the functional groups confirmed in the FT-IR analysis corroborated the phytochemical test results.
胡麻(Rivina humilis L.)植物可作为抗菌、抗氧化剂和天然杀虫剂。天然产物的大部分生物活性来源于其中所含的次级代谢产物。研究表明,胡麻的叶、枝和果实提取物对生物活性的影响。然而,对胡麻果实的植物化学成分的鉴定却很少有人讨论。本文采用植物化学筛选试验和光谱法对胡麻果实提取物的次生代谢产物进行了鉴定研究。采用甲醇溶剂浸渍法提取胡麻果实。一系列植物化学筛选试验表明存在生物碱、萜类、单宁和黄酮类化合物。此外,我们应用FT-IR分析来证实次级代谢产物化合物中存在官能团。在3265cm-1处有一个宽的吸收带显示出羟基(O-H)。1632cm-1处的锐带表现出C=C伸缩带。C-N(拉伸)的存在由1237cm-1处的吸收带表示,而CH3末端(烷烃、烷基)中的C-H键在1401cm-1处显示。FT-IR分析中确认的所有官能团都证实了植物化学测试结果。
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引用次数: 0
Kajian Penggunaan Carbon Black N990 sebagai Bahan Pengisi Kompon Karet Alam: Sifat Dinamik, Kestabilan Termal, dan Ketahanan Panas 炭黑N990作为天然碳组分的使用试验:动态特性、热稳定性和热压
Pub Date : 2023-03-24 DOI: 10.25077/jrk.v14i1.560
Purwantiningsih Sugita
The manufacture of vibration damping material from natural rubber (NR) required an increase in dynamic properties, thermal stability, and resistance to heat. Using the Carbon Black N990 as a filler in NR vulcanizates can potentially increase on these properties. This research aims to study the effect of using Carbon Black N990 on dynamic properties, thermal stability, and aging resistance to heat in NR vulcanizates. The dynamic properties of NR vulcanizates were determined by Rubber Process Analyzer (RPA), while the thermal stability properties were studied by TGA, and heat resistance was determined by the thermal aging test. The RPA test results showed that adding 50 phr Carbon Black N990 in the NR compound could increase the value of the complex shear modulus to 65%. Furthermore, the results of the TGA test showed that the thermal stability properties of unfilled NR vulcanizates were better than that of NR vulcanizates containing Carbon Black N990. Unfilled NR vulcanizates were heat stable up to 353oC, while NR vulcanizates containing 15, 30, and 50 parts per hundred rubber (phr) Carbon Black N990, respectively, were heat stable up to 348.1oC, 348oC, and 349oC. Based on the requirements of ISO 4632-1, it showed that the NR compound containing Carbon Black N990 has good heat resistance properties. The NR compound formula contains 30 phr Carbon Black N990 showing good dynamic properties and heat resistance in accordance with EN 15129 requirements so that it has the potential to be used as a vibration damping material for earthquake-resistant structures.
用天然橡胶(NR)制造减振材料需要提高动态性能、热稳定性和耐热性。在NR硫化胶中使用炭黑N990作为填料可能会提高这些性能。本研究旨在研究炭黑N990对NR硫化胶动态性能、热稳定性和耐热老化性能的影响。用橡胶过程分析仪(RPA)测定了NR硫化胶的动态性能,用热重分析仪(TGA)研究了其热稳定性,并通过热老化试验测定了其耐热性。RPA测试结果表明,在NR复合材料中加入50phr炭黑N990可以将复合剪切模量提高到65%。此外,TGA测试结果表明,未填充NR硫化胶的热稳定性优于含有炭黑N990的NR硫化胶。未填充的NR硫化胶在高达353℃时热稳定,而分别含有15、30和50份/100橡胶(phr)炭黑N990的NR硫化料在高达348.1℃、348℃和349℃时热稳定性。根据ISO 4632-1的要求,结果表明含炭黑N990的NR复合材料具有良好的耐热性能。NR复合配方含有30phr炭黑N990,根据EN 15129要求显示出良好的动态性能和耐热性,因此它有潜力用作抗震结构的减振材料。
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引用次数: 0
Sintesis dan Uji Fotostabilitas Kompleks Zn(II)-Astaxanthin 合成和测试Zn(II)-Astaxanthin复合物
Pub Date : 2023-03-24 DOI: 10.25077/jrk.v14i1.568
Winda Rahmalia, Dwi Imam Prayitno, Adhitiyawarman, Septiani
Astaxanthin is a pigment from the carotenoid group found in algae, shrimp, and crabs. Due to its chemical structure, astaxanthin has many health benefits but low stability against direct exposure to light and oxygen. In this study, the Zn-astaxanthin complex was synthesized using a reflux reactor at 37o and 60oC. Complex compounds were analyzed using a UV-Vis spectrophotometer and FTIR. The UV-Vis spectrophotometer analysis showed a bathochromic shift in acetone (475 to 477 nm). In comparison, in dimethyl sulfoxide, a hypsochromic shift (493 to 475 nm) was observed, and a new absorption peak was observed at 330 nm. FTIR analysis shows a decrease in the intensity of the C=O stretching vibration and -OH group vibration at 1712 and 1219 cm-1, respectively. This indicated an interaction between the metal ion Zn2+ and astaxanthin. Zn-astaxanthin has better stability than astaxanthin during irradiation, using a halogen lamp at a light intensity of 300 W/m2 for 6 hours. Based on the zero-order degradation kinetics model, the degradation rate constant of the Zn-astaxanthin complex was 0.0621, smaller than that of astaxanthin (0.0880).
虾青素是一种来自类胡萝卜素的色素,存在于藻类、虾和螃蟹中。由于其化学结构,虾青素有许多健康益处,但在直接暴露于光和氧下的稳定性较低。本研究采用回流反应器在37℃和60℃条件下合成了锌-虾青素配合物。用紫外-可见分光光度计和红外光谱对络合物进行分析。紫外-可见分光光度计分析显示丙酮的色移(475 ~ 477 nm)。相比之下,在二甲亚砜中,观察到493 ~ 475 nm的次色移,并在330 nm处观察到新的吸收峰。FTIR分析表明,在1712 cm-1和1219 cm-1处,C=O拉伸振动和-OH基团振动强度减小。这表明金属离子Zn2+与虾青素之间存在相互作用。在300 W/m2光强卤素灯照射6小时后,锌-虾青素在辐照过程中的稳定性优于虾青素。基于零级降解动力学模型,锌-虾青素配合物的降解速率常数为0.0621,小于虾青素的降解速率常数(0.0880)。
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引用次数: 0
Optimasi Proses Hidrolisis Rumput Laut Ulva Reticulata dengan Pelarut HNO3 untuk Produksi Bioetanol uva Reticulata海藻水解过程的优化与HNO3溶剂生产生物乙醇
Pub Date : 2023-03-24 DOI: 10.25077/jrk.v14i1.574
Sefrinus Maria Dolfi Kolo
One alternative to make biofuels and replace petroleum-based fuels is to convert non-food ingredients from Ulva reticulata seaweed into bioethanol. Seventy percent of the earth's surface is covered by microalgae and seaweeds that can be converted into bioethanol. Ulva seaweed contains 50.3% carbohydrates in the form of heteropolysaccharides  such as glucose, arabinose, rhamnose and xylose. Optimization of the seaweed hydrolysis catalyzed by HNO3 using Microwave irradiation was done by varying acid concentration (1, 3, 5, 7%), hydrolysis time (30, 40, 50, and 60 minutes), and hydrolysis temperature (75, 100, 125, 150°C). Fermentation was carried out by varying inoculum concentrations (6, 8, and 10% (v/v)) for 5, 6 and 7 days at a temperature of 30°C and a pH of 4.5. Analysis of the surface texture of the sample was carried out by Scanning Electron Microscopy (SEM). The analysis of reducing sugars concentration was carried out using the dinitrosalicylate (DNS) method. Ethanol analysis was carried out by Gas Chromatography (GC). The results of SEM analysis showed that prior to hydrolysis, the surface morphology of the powder was still compact and intact. Whereas after being hydrolyzed with HNO3 it was seen that the surface texture of the powder suffered significant damage. The hydrolysis results showed that the optimum conditions during the pretreatment of U. reticulata powder was at acid concentration of 7%, reaction time of 50 minutes, reaction temperature of 150°C and 250 watts of power which gave hydrolysate with reducing sugar concentration of 86.5 g/L. Fermentation of the hydrolysate using yeast Saccharomyces cerevisiae produced bioethanol with concentration of 37.2% as analyzed using a gas chromatograph.
制造生物燃料和替代石油基燃料的一种替代方法是将网状海藻中的非食品成分转化为生物乙醇。70%的地球表面覆盖着微藻和海藻,它们可以转化为生物乙醇。Ulva海藻含有50.3%的碳水化合物,以异多糖的形式存在,如葡萄糖、阿拉伯糖、鼠李糖和木糖。通过不同酸浓度(1、3、5、7%)、水解时间(30、40、50、60分钟)和水解温度(75、100、125、150℃)对微波辐照下HNO3催化海藻水解进行了优化。在温度为30°C, pH为4.5的条件下,通过不同的接种浓度(6,8和10% (v/v))进行发酵,发酵5,6和7天。利用扫描电镜(SEM)对样品的表面织构进行了分析。采用二硝基水杨酸(DNS)法测定还原糖浓度。乙醇分析采用气相色谱法(GC)。SEM分析结果表明,在水解前,粉末的表面形貌仍然致密完整。而经HNO3水解后,粉末的表面结构受到明显的破坏。结果表明,预处理青豆粉的最佳条件为酸浓度为7%,反应时间为50 min,反应温度为150℃,反应功率为250瓦,可得到还原糖浓度为86.5 g/L的水解产物。用酵母对水解液进行发酵,产生物乙醇浓度为37.2%,采用气相色谱仪分析。
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引用次数: 0
Komponen Kimia Minyak Atsiri yang Diisolasi dari Daun Tanaman Pucuk Merah (Syzygium myrtifolium Walp.) dan Potensi Antibakteri serta Toksisitasnya 从红斑植物(Syzygium myrtifolium Walp)的叶子中分离出Atsiri油的化学成分,以及它潜在的抗菌和毒性
Pub Date : 2023-03-24 DOI: 10.25077/jrk.v14i1.583
Suryati, Bustanul Arifin, Thaharah Alifa Aziz Yenuuar, Rahmi Vika Ulia, Shafinna Hana Fadhia, Miftahul Melsya Salsabilla
Pucuk merah (Syzygium myrtifolium Walp.) is an ornamental plant from the Myrtaceae family. Several phytochemical tests from previous researchers reported that pucuk merah contains secondary metabolites that have benefits such as antioxidants, antibacterials, and anti-cancer. In addition, the distinctive aroma produced from pucuk merah  leaves indicates the presence of essential oils whose bioactivity can be studied. Still, there has been no report on this plant's chemical components or bioactivity. Therefore, this study aims to determine the content of chemical components of pucuk merah  essential oil and their bioactivity as antibacterial and toxicity. The isolation of essential oils was carried out by the hydro distillation method. The chemical components of essential oils were analyzed using the Gas Chromatography-Mass Spectrometry (GC-MS) method. GC-MS results showed the presence of 42 compounds with four main compounds, namely caryophyllene (23.45%), 3-carene (15.67%), α-terpineol (10.74%), and α-pinene (5.98%) ). Antibacterial test of pucuk merah  essential oil using the disc diffusion method showed strong activity against Staphylococcus aureus and Escherichia coli with inhibition zones of 16.15 ± 2.03 and 16.13 ± 1.74 mm at 100% concentration. The results of the toxicity test of pucuk merah  essential oil using the BSLT (Brine Shrimp Lethality Test) method on Artemia salina Leach shrimp larvae showed strong toxic properties with an LC50 value of 3.99 µg/mL.
杨梅(Syzygium myrtifolium Walp.)是杨梅科的一种观赏植物。先前研究人员的几项植物化学测试报告称,pucuk merah含有次级代谢产物,具有抗氧化、抗菌和抗癌等功效。此外,柚子叶产生的独特香气表明存在可以研究其生物活性的精油。尽管如此,目前还没有关于这种植物的化学成分或生物活性的报道。因此,本研究旨在测定蒲葵精油的化学成分含量及其抗菌、毒性等生物活性。采用加氢蒸馏法分离精油。采用气相色谱-质谱联用技术对精油的化学成分进行了分析。气相色谱-质谱分析结果显示,共有42种化合物,其中4种主要化合物,即石竹烯(23.45%)、3-芳烃(15.67%)、α-萜品醇(10.74%)和α-蒎烯(5.98%)。采用圆盘扩散法对pucuk merah精油进行抗菌试验,结果表明,在100%浓度下,其对金黄色葡萄球菌和大肠杆菌的抗菌活性较强,抑菌带分别为16.15±2.03和16.13±1.74mm。采用BSLT(Brine Shrimp Lethality test)方法对卤虫Leach虾幼虫进行的pucuk merah精油毒性试验结果显示,其LC50值为3.99µg/mL,具有较强的毒性。
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引用次数: 0
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Jurnal Riset Kimia
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