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An Efficient Gravitational Search Decision Forest Approach for Fingerprint Recognition 一种高效的引力搜索决策森林方法用于指纹识别
Pub Date : 2022-08-22 DOI: 10.48129/kjs.20635
Mahesh Kumar, Devender Kumar
Fingerprint based human identification is one of the authentic biometric recognition systems due to the permanence and uniqueness of the finger impressions. There is the extensive usage of fingerprint recognition in personalized electronic devices, security systems, banking, forensic labs, and especially in law enforcement agencies. Although the existing systems can recognize fingerprints, they lack in case of poor quality and latent fingerprints. The latent fingerprints are captured by law enforcement agencies during the crime scene to find the criminal. Consequently, it is essential to develop a novel system that can efficiently recognize both complete and latent fingerprints. The current work proposes an efficient Gravitational Search Decision Forest (GSDF) method, which is a combination of the gravitational search algorithm (GSA) and the random forest (RF) method. In the proposed GSDF approach, the mass agent of GSA determines the solution by constructing decision trees in accordance with the random forest hypothesis. The recognition of the fingerprints is accomplished by mass agents in the form of a final generated decision forest from the set of hypothesis space as the mass agents can create multiple hypotheses using random proportional rules. The experiments for fingerprint recognition are conducted for both the latent fingerprints (NIST SD27 dataset) and the complete fingerprints (FVC2004 dataset). The effectiveness of the proposed GSDF approach is analyzed by evaluating the results with machine learning classifiers (random forest, decision tree, back propagation neural networks, and k-nearest neighbor) as well. The comparative analysis of the proposed approach and incorporated machine learning classifiers indicates the outperformed performance of the proposed approach.
基于指纹的人体识别由于指纹印痕的持久性和唯一性,是一种真实的生物特征识别系统。指纹识别广泛应用于个性化电子设备、安全系统、银行、法医实验室,尤其是执法机构。现有的指纹识别系统虽然能够识别指纹,但存在质量差、指纹潜在等问题。执法机关在犯罪现场采集潜在指纹,以查找罪犯。因此,开发一种既能有效识别完整指纹又能有效识别潜在指纹的新系统至关重要。本文提出了一种高效的引力搜索决策森林(GSDF)方法,该方法将引力搜索算法(GSA)与随机森林(RF)方法相结合。在本文提出的GSDF方法中,GSA的质量代理根据随机森林假设,通过构造决策树来确定解。由于大量智能体可以使用随机比例规则创建多个假设,因此指纹识别由大量智能体以假设空间集最终生成决策森林的形式完成。分别对潜在指纹(NIST SD27数据集)和完整指纹(FVC2004数据集)进行了指纹识别实验。通过评估机器学习分类器(随机森林、决策树、反向传播神经网络和k近邻)的结果,分析了所提出的GSDF方法的有效性。对所提方法和合并的机器学习分类器的比较分析表明,所提方法的性能优于所提方法。
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引用次数: 1
Effect of temperature on the spread of Covid-19 in Qatar, Kuwait and other Gulf countries 温度对新冠病毒在卡塔尔、科威特和其他海湾国家传播的影响
Pub Date : 2022-07-28 DOI: 10.48129/kjs.splcov.19499
Maha Abujazar, S. Al-Awadhi, Mustapha Rachdi, H. Bensmail
Background: COVID-19 has emerged as a serious pandemic that emerged during since the end of 2019. The dissemination and survival of coronaviruses have been demonstrated to be affected by ambient temperature in epidemiological and laboratory research. The goal of this investigation was to see if temperature plays a role in Methods: Between March 29, 2020, and September 29, 2020, daily confirmed cases and meteoro-logical parameters in many Gulf countries were collected. Using a generalized additive model, we investigated the nonlinear relationship between mean temperature and COVID-19 confirmed cases.. To further investigate the association, we employed a piecewise linear regression. Results: According to the exposure-response curves, the association between mean temperature and COVID-19 cases was nearly linear in the window of 21-30degreeC while it is almost flat beyond that window. When the number was below 21degreeC (lag 0-14), each 1degreeC increase was associated with a 4:861 percent (95 percent CI: 3:209 􀀀 6:513) increase in mean temperature (lag 0-14). Our sensitiv-ity analysis confirmed these conclusions. Conclusions: Our findings show a positive linear association between mean temperature and the number of COVID-19 cases with a threshold of 21degreeC. There is little evidence that COVID-19 case numbers would rise as the weather becomes colder, which has important consequences for making health strategy and decision.
背景:2019冠状病毒病已成为2019年底以来出现的严重大流行。流行病学和实验室研究表明,冠状病毒的传播和存活受到环境温度的影响。本次调查的目的是了解温度是否在方法中起作用:在2020年3月29日至2020年9月29日期间,收集了许多海湾国家的每日确诊病例和气象参数。采用广义加性模型,研究了平均气温与新冠肺炎确诊病例之间的非线性关系。为了进一步研究这种关联,我们采用了分段线性回归。结果:从暴露-响应曲线看,平均气温与新冠肺炎病例在21 ~ 30℃窗口内呈线性关系,在21 ~ 30℃窗口外呈线性关系。当这个数字低于21度(滞后0-14)时,每增加1度,平均温度就会增加4:861% (95% CI: 3:209􀀀6:513)(滞后0-14)。我们的敏感性分析证实了这些结论。结论:我们的研究结果显示,平均气温与新冠肺炎病例数呈线性正相关,阈值为21℃。几乎没有证据表明,随着天气变冷,COVID-19病例数会上升,这对制定卫生战略和决策具有重要影响。
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引用次数: 0
Sensitivity Analysis of NEMS Cantilever to Detect Volatile Organic Compounds Using Finite Element Method 用有限元法分析NEMS悬臂梁检测挥发性有机化合物的灵敏度
Pub Date : 2022-07-06 DOI: 10.48129/kjs.20501
C. Jayaprakash, Dr N Siddaiah
Nano Electro Mechanical System (NEMS) based cantilever is the alternate form of Micro Electro Mechanical system (MEMS) with dimensional changes in perspectives like thickness, length, and width. The advantage of the dimensional change leads to great improvement in sensitivity and performance with portable structure. In this paper, a stepped nanocantilever sensor is designed for the detection of volatile organic compounds. The same is compared with the conventional micro cantilevers in order to assess the sensitivity. The advantage of incorporating longitudinal cut at fixed end of the cantilever is investigated for different materials with load analysis and stress distributed results. COMSOL Simulation software is used to perform the analysis of nanocantilever and the result shows sensitivity increased with longitudinal cut and type of material which exhibits good sensitivity. In this research, we suggest a stepped cantilever structure that uses FEM (Finite Element Method) of analysis to calculate the change in deflection owing to various loads in both static and dynamic analyses. Similarly, changes in resonance frequency for changes in beam thickness are examined using parametric study. The experimental results from COMSOL simulation are found that the displacement occurred in proposed cantilever that the deflection sensitivity 2.85 x10-9m under maximum stress of 3.32 x10-9 N/m2. From the dynamic analysis, resonant frequency occurs at 20nm thickness is 2.8x107 Hz, and at 30nm is 3.5 x 107 Hz respectively.
基于纳米机电系统(NEMS)的悬臂梁是微机电系统(MEMS)的另一种形式,其尺寸在厚度、长度和宽度等方面发生变化。尺寸变化的优势使得灵敏度和性能有了很大的提高。本文设计了一种用于挥发性有机化合物检测的阶梯式纳米反杠杆传感器。并与传统微悬臂梁进行了比较,以评估其灵敏度。通过载荷分析和应力分布分析,对不同材料的悬臂梁固定端加入纵向切割的优势进行了研究。利用COMSOL仿真软件对纳米反杠杆进行了分析,结果表明,随着纵向切割和材料类型的增加,纳米反杠杆的灵敏度有所提高,并表现出较好的灵敏度。在本研究中,我们提出了一种阶梯式悬臂结构,在静力和动力分析中使用有限元分析方法来计算各种载荷引起的挠度变化。同样,谐振频率的变化,梁的厚度的变化是用参数研究。COMSOL模拟实验结果表明,在最大应力为3.32 x10-9 N/m2时,悬臂梁的挠度灵敏度为2.85 x10-9m。从动力学分析来看,在20nm厚度处谐振频率为2.8 × 107 Hz,在30nm厚度处谐振频率为3.5 × 107 Hz。
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引用次数: 0
An Efficient Synthesis of N'',N'''-Bis[(E)-phenylmethylidene]carbonic Dihydrazide Derivatives and Their Evaluation as α-Chymotrypsin Inhibitors N',N'' -双[(E)-苯基甲基]碳二肼衍生物的高效合成及其α-胰凝乳酶抑制剂的评价
Pub Date : 2022-07-06 DOI: 10.48129/kjs.19975
S. Iqbal, Shazia Abrar, A. Mukhtar, Irfan Ahmad, Muhammad Zawar Khan
N'',N'''-Bis[(E)-phenylmethylidene]carbonic dihydrazide, azotic ligands with lone electron pairs, have wide range of applications in catalysis, medicine, corrosion, and analytical chemistry. Keeping this broad range of applications in view, we have developed a new green method for the rapid synthesis of N'',N'''-Bis[(E)-phenylmethylidene]carbonic dihydrazide and its derivatives. By using a new protocol, a range of carbonic dihydrazides 1-22 has been synthesized in excellent yields. All synthesized compounds have been characterized by elemental analyses, 1H-NMR, EI-MS and HR-MS. These carbonic dihydrazides have also been synthesized via conventional method. On comparisons of new and conventional methods, it is evident that newly developed solvent-free method is more proficient, high yielding, and simple. As protease inhibitors are known to inhibit not only proliferation of cancer cell lines but also to cure hepatitis C virus and HIV aids infections, therefore, all purified and characterized compounds have also been evaluated for their potential to act as in vitro α-chymotrypsin (an enzyme belongs to protease family) inhibitors. Among tested compounds, ten compounds have shown varying degree of α-chymotrypsin inhibition potential.
N′,N′′-双[(E)-苯基甲基]碳二肼是具有孤电子对的偶氮配体,在催化、医药、腐蚀、分析化学等方面有着广泛的应用。考虑到这一广泛的应用范围,我们开发了一种新的绿色快速合成N',N'' -双[(E)-苯基甲基]碳二肼及其衍生物的新方法。采用新工艺合成了一系列碳二肼1-22,收率高。所有合成的化合物都通过元素分析、1H-NMR、EI-MS和HR-MS进行了表征。这些碳二肼也用常规方法合成。通过对新方法和传统方法的比较,可以看出新开发的无溶剂方法更熟练、收率高、操作简单。由于已知蛋白酶抑制剂不仅可以抑制癌细胞系的增殖,而且还可以治疗丙型肝炎病毒和艾滋病病毒感染,因此,所有纯化和表征的化合物也被评估为它们在体外作为α-凝乳胰蛋白酶(一种酶属于蛋白酶家族)抑制剂的潜力。在所测试的化合物中,有10个化合物表现出不同程度的α-凝乳胰蛋白酶抑制潜力。
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引用次数: 0
Insilico analysis on the complex relationship among antibiotic resistance, virulence genes and insertion sequences in Pseudomonas aeruginosa 铜绿假单胞菌抗生素耐药性、毒力基因与插入序列复杂关系的计算机分析
Pub Date : 2022-07-06 DOI: 10.48129/kjs.14591
Santhiya Kalimuthu
Pseudomonas aeruginosa is the most frequent nosocomial pathogen, causing many infections in people and posing significant health risks worldwide. The current work attempts to understand the connection between antibiotic resistance genes (ARG), virulence factors (VF), and insertion sequences (IS) in P. aeruginosa. Fifty-six P. aeruginosa complete plasmids were retrieved from the NCBI database for this investigation. The CARD and Resfinder tools are used to discover ARG in P. aeruginosa. The VF analyzer and ISsaga tools are used to identify virulence genes and insertion sequences in the sorted plasmids. Using the tool PHASTER, the participation of prophage and integrase genes was discovered. Resistance to sulfonamide and beta-lactam was the most common ARG among the plasmids. Fil, pil, and XCP secretion systems are prevalent virulence genes. The prophage, integrase, and transposons were also identified. The correlation analysis of ARG, VF, and IS revealed that ISs, rather than virulence factors, had the most significant effect on the P. aeruginosa genome studied. As a result, an understanding of infectious bacterial profiles regarding pathogenicity islands and mobile elements is required to gain knowledge of their distribution and limit their spread throughout the world.
铜绿假单胞菌是最常见的医院病原体,在人类中引起许多感染,并在世界范围内构成重大健康风险。目前的工作试图了解P. aeruginosa中抗生素耐药基因(ARG),毒力因子(VF)和插入序列(IS)之间的联系。从NCBI数据库中检索56个铜绿假单胞菌完整质粒。使用CARD和Resfinder工具发现铜绿假单胞菌中的ARG。使用VF分析仪和ISsaga工具鉴定已分类质粒中的毒力基因和插入序列。利用PHASTER工具,发现了噬菌体和整合酶基因的参与。对磺胺和β -内酰胺的抗性是质粒中最常见的ARG。Fil, pil和XCP分泌系统是流行的毒力基因。还鉴定了噬菌体、整合酶和转座子。ARG、VF和IS的相关性分析表明,ISs对P. aeruginosa基因组的影响最为显著,而不是毒力因子。因此,需要了解有关致病性岛屿和移动元素的传染性细菌概况,以了解其分布并限制其在世界范围内的传播。
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引用次数: 0
The Effect of Mixing Nanoparticles on the Suspension Physical Stability 纳米颗粒混合对悬浮液物理稳定性的影响
Pub Date : 2022-07-06 DOI: 10.48129/kjs.17831
F. Kareem, A. Saeed, Mahasin F. Hadi Al- Kadhemy, F. Kadhum
Energy transfer in a hybrid mixture of Rhodamine 6G (Rh6G) dye laser as a donor and nanoparticles (NPs) as an acceptor were studied. The absorption spectra of 1×10-5M of Rh6G in Distilled Water show increase in the intensity when adding NPs. noticeable, improve the spectra when adding Aluminum Oxide Al2O3 NPs. Adding NPs quench the fluorescence spectra of Rh6G due to Förster resonance energy transfer (FRET). The efficiency of energy transfer increase with increasing concentration of NPs. Best value of efficiency of energy transfer found in Rh6G/ Magnesium Oxide MgO NPs. Strong relationship was in Rh6G/ Al2O3 NPs.
研究了罗丹明6G (Rh6G)染料激光器作为供体和纳米粒子作为受体的杂化混合物中的能量传递。加入NPs后,Rh6G在蒸馏水中1×10-5M的吸收光谱强度增大。添加氧化铝Al2O3纳米粒子后,光谱明显改善。NPs的加入使Rh6G的荧光光谱因Förster共振能量转移(FRET)而猝灭。能量传递效率随着NPs浓度的增加而增加。在Rh6G/氧化镁MgO NPs中发现了能量转移效率的最佳值。在Rh6G/ Al2O3 NPs中存在较强的相关性。
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引用次数: 0
Synthesis, characterization, anti-microbial and anti-fungal activity studies of four novel 2-aminopyridine and 2,4-dichloro-5-sulfamoylbenzoic acid salts and their Cu(II) complexes 四种新型2-氨基吡啶和2,4-二氯-5-磺胺基苯甲酸盐及其Cu(II)配合物的合成、表征及抑菌活性研究
Pub Date : 2022-07-06 DOI: 10.48129/kjs.19163
H. İlkimen, Aysel Gülbandilar
Four novel proton transfer compounds (1-4) obtained between 2-aminopyridine (1), 2-amino-4-methylpyridine (2), 2-amino-5-methylpyridine (3), 2-amino-6-methylpyridine (4) and 2,4-dichloro-5-sulfamoylbenzoic acid (Hsba) and their Cu(II) complexes (6-10) have been synthesized. The structures of powdery salts (1-4) and complexes (6-10) have been suggested by spectral (1H-NMR, FT-IR and UV–Vis), elemental analysis, AAS, molar conductivity and magnetic susceptibility techniques of 6-10 have also been reported. The structures of metal complexes (6-10) were observed octahedral according to spectroscopic analysis results. Additionally, anti-microbial and anti-fungal activities of all compounds have been tested against Escherichia coli (ATCC 25922) (Gram negative), Enterococcus faecalis (ATCC 29212) (Gram positive), Staphylococcus aureus (ATCC 29213) (Gram positive), and Candida Albicans (ATCC 14053) (yeast), Candida parapisilosis (ATCC 22019) (yeast), and Candida krusei (ATCC 6258) (yeast). The results were comparisoned with the antibiotics, Fluconazole as anti-fungal agent and Cefepime, Levofloxacin, Vancomycin as anti-microbial agents. Activity against all compounds bacteria and yeasts was observed. Therefore, all compounds may be utilized for the synthesis of new anti-microbial and anti-fungal. Compounds with the best activity are 2 (15.60) for S. aureus, 2, 8 and 11 (31.25) for E. Faecalis, 2a5mp, 1, 2 and 9 (31.25) for E. Coli, Cu(OAc)2.2H2O, 1, 2 and 9 (31.25) for C. Parapsilosis, Hsba (15.60) for C. Albicans and Hsba and 8 (31.25) for C. Krusei.
合成了2-氨基吡啶(1)、2-氨基-4-甲基吡啶(2)、2-氨基-5-甲基吡啶(3)、2-氨基-6-甲基吡啶(4)和2,4-二氯-5-氨基磺酰基苯甲酸(Hsba)及其Cu(II)配合物(6-10)之间的新型质子转移化合物(1-4)。粉末状盐(1-4)和配合物(6-10)的结构已通过光谱(1H-NMR、FT-IR和UV-Vis)、元素分析、原子吸收光谱、摩尔电导率和磁化率等技术得到了证实。根据光谱分析结果,金属配合物(6 ~ 10)呈八面体结构。此外,所有化合物对大肠杆菌(ATCC 25922)(革兰氏阴性)、粪肠球菌(ATCC 29212)(革兰氏阳性)、金黄色葡萄球菌(ATCC 29213)(革兰氏阳性)、白色念珠菌(ATCC 14053)(酵母)、副假丝酵母菌(ATCC 22019)(酵母)和克鲁假丝酵母菌(ATCC 6258)(酵母)的抗菌和抗真菌活性进行了测试。结果与常用抗菌药物氟康唑和头孢吡肟、左氧氟沙星、万古霉素进行比较。观察了对所有化合物细菌和酵母的活性。因此,所有化合物均可用于合成新的抗微生物和抗真菌药物。活性最佳的化合物为金黄色葡萄球菌2(15.60)、粪肠杆菌2、8、11(31.25)、大肠杆菌2a5mp、1、2、9(31.25)、铜(OAc)2.2H2O、1、2、9(31.25)、白色念珠菌和Hsba Hsba(15.60)、克鲁塞c(31.25)。
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引用次数: 1
Congruent Assessment of human hypoglycemic effect through STZ-Induced Diabetic rats fed Dromedary Camel (Camelus dromedarius) milk 单峰骆驼(Camelus dromedarius)奶对stz诱导的糖尿病大鼠降糖效果的一致性评价
Pub Date : 2022-07-06 DOI: 10.48129/kjs.16777
Sirar A. Baker, Amal M. Al‐Saffar, M. Al-Sughayer
Diabetes mellitus (DM), a heterogeneous metabolic disorder, affect people at any point of their lives. Globally, a wide variation in the prevalence of diabetes was observed but, showed zero percent within people that regularly consume camel milk because of their highly nutritional and therapeutic potentials to treat many metabolic and autoimmune diseases. The present study validated the efficacy of camel milk by investigating the differential hypoglycemic effects in concurrence with related biochemical tests in rats fed with raw and pasteurized milk of the one-humped Arabian camel (Camelus dromedarius). Male Sprague-Dawley rats (60mg.Kg-1 body weight) fed separately with raw and pasteurized camel milk for three weeks and injected with streptozotocin induced DM besides the investigation on the levels of blood glucose, cholesterol, triacylglycerol (TAG), and insulin. Results showed a significant hypoglycemic effect with both raw and pasteurized camel milk but, more prominent with the raw milk. Three weeks consumption of raw camel milk significantly increased blood cholesterol levels while consumption of pasteurized camel milk caused the reverse. Both types of camel milk revealed significant decrease in the blood TAG levels and were statistically validated. Thus, the present study recommends the choice of camel milk consumption especially in diabetic patients as well, as an immunity booster in the wake of the present environmental health issues.
糖尿病(DM)是一种异质性代谢紊乱,影响人们生活的任何阶段。在全球范围内,观察到的糖尿病患病率差异很大,但在经常饮用骆驼奶的人群中,糖尿病患病率为零,因为骆驼奶具有很高的营养价值和治疗潜力,可以治疗许多代谢和自身免疫性疾病。本研究通过研究骆驼奶对大鼠的不同降糖作用,并结合相关的生化试验,验证了骆驼奶的功效。雄性Sprague-Dawley大鼠(60mg。Kg-1体重)分别饲喂生的和巴氏消毒的骆驼奶3周,并注射链脲佐菌素诱导糖尿病,同时观察血糖、胆固醇、甘油三酯(TAG)和胰岛素水平。结果表明,生骆驼奶和巴氏消毒骆驼奶的降糖效果都很显著,但生骆驼奶的降糖效果更明显。食用三周的生骆驼奶会显著增加血液中的胆固醇水平,而食用巴氏消毒骆驼奶则会产生相反的效果。两种骆驼奶均显示血液TAG水平显著降低,并经统计学验证。因此,本研究建议,在当前的环境健康问题之后,尤其是糖尿病患者,选择饮用骆驼奶作为免疫增强剂。
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引用次数: 0
Suppression of Fas expression in the hypertensive placental histology of rast given Nano herbal of Rhodomyrtus tomentosa leaves 毛红荆叶纳米中药对高血压大鼠胎盘组织Fas表达的抑制作用
Pub Date : 2022-07-06 DOI: 10.48129/kjs.16833
P. Situmorang, R. A. Syahputra, R. H. Simanullang
High blood pressure during pregnancy can signal a high-risk pregnancy and result in difficulties. The expression of Fas is critical for maintaining hypertensive immunity. Fas is prevalent in the trophoblast and enhances maternal-derived apoptosis. Because it contains acylphloroglucinol, flavonoids, tannins, and triterpenes, Rhodomyrtus tomentosa (haramonting) is commonly used in traditional Indonesian medicine to treat high blood pressure. This study aimed to investigate and determine the role of haramonting in lowering Fas expression in hypertensive rats’ placental histopathology. The rats were confirmed to be pregnant and divided into five groups: normal pregnant rats (control); hypertensive rats without treatment; and hypertensive rats given nanoherbal Rhodomyrtus tomentosa (NRT) at different doses: 100 mg/kg body weight (BW), 200 mg/kg BW, and 400 mg/kg BW. On gestation day 20, pregnant rats were euthanized under ketamine anaesthesia. Enzyme-linked immunosorbent assay (ELISA) analysis was used to examine the expression of the HSP family. Immunohistochemistry was used to assess Fas expression. In hypertensive rats, NRT lowered the systolic and diastolic blood pressure (P < 0.01), and NRT improved placental efficiency and restored birth weight. In hypertensive rats, higher doses of NRT were associated with higher levels of HSP27, HSP70, and HSP90. In placental histology, NRT suppresses Fas expression, acting as an anti-apoptotic agent in trophoblast cells. Because NRT is high in antioxidants and protects cells from hypoxia and dehydration, it suppresses Fas activity in the labyrinthine zone, basal zone, and yolk sac.
怀孕期间的高血压可能是高危妊娠的信号,并导致困难。Fas的表达对维持高血压免疫至关重要。Fas普遍存在于滋养细胞中,并促进母源性细胞凋亡。因为它含有酰基间苯三酚、类黄酮、单宁和三萜,所以在传统的印度尼西亚医学中,毛蕊红常被用来治疗高血压。本研究旨在探讨和确定haramting在高血压大鼠胎盘组织病理学中降低Fas表达的作用。将确认怀孕的大鼠分为5组:正常妊娠大鼠(对照组);未经治疗的高血压大鼠;和高血压大鼠给予不同剂量的纳米草药绒毛红荆(NRT): 100 mg/kg体重(BW)、200 mg/kg BW和400 mg/kg BW。妊娠第20天,在氯胺酮麻醉下对怀孕大鼠实施安乐死。采用酶联免疫吸附法(ELISA)检测HSP家族的表达。免疫组化法检测Fas表达。在高血压大鼠中,NRT降低了收缩压和舒张压(P < 0.01),提高了胎盘效率,恢复了出生体重。在高血压大鼠中,较高剂量的NRT与较高水平的HSP27、HSP70和HSP90相关。在胎盘组织学中,NRT抑制Fas的表达,在滋养细胞中起到抗凋亡的作用。由于NRT富含抗氧化剂并保护细胞免于缺氧和脱水,它抑制了迷路区、基底区和卵黄囊中的Fas活性。
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引用次数: 1
Citrus maxima (Burm.) Merr. fruit juice and peel extract mediated synthesis of silver nanoparticles (Ag NPs) and their applications as antimicrobial agents and plant growth enhancers 柑橘(棕)稳定。果汁和果皮提取物介导的纳米银的合成及其在抗菌剂和植物生长促进剂中的应用
Pub Date : 2022-07-06 DOI: 10.48129/kjs.19889
Indukalpa Das, Abhijit Sonowal, B. Gogoi, Bidisha Sharma, Kaustuvmani Patowary, Debajit Borah
Green synthesis of metal nanoparticles (NP) has emerged as a recent trend in green chemistry. However, their potential in the field of agriculture is yet underexplored. In this study, silver nanoparticles (Ag NPs) were synthesized by using the fruit juice and peel extract of Citrus maxima (Burm.) Merr. as a reducing and capping agent. The nano-primed seeds of Zea mays, Glycine max, and Cicer arietinum showed enhanced germination rate up to 90% as compared to the respective control (30-60%) and also enhanced plant growth. The HRTEM images of fruit-mediated Ag NPs showed well-dispersed particles. The XRD diffraction pattern confirmed the crystalline nature of Ag NPs with fcc lattice points of 101, 111, 200, 220, and 311 with an average crystal size of 19.1275±1.73 nm. On the other hand, the peel-mediated Ag NPs exhibited a size range of 10-20 nm with average crystal size of 19.09±1.71 nm. The FTIR spectra confirmed the presence of ʋC=C-H, ʋCH2, ʋC=O (stretch), ʋC=C (stretch), ʋC-H (bend), ʋC-O (bend) in the Ag NPs synthesized by the fruit and peel extract. The Ag NPs also showed potential antimicrobial effects against both Gram-positive (Staphylococcus aureus) and negative bacteria (Klebsiella pneumonia).
金属纳米颗粒的绿色合成是近年来绿色化学的发展趋势。然而,它们在农业领域的潜力尚未得到充分开发。本研究以柑桔汁和果皮提取物为原料合成了银纳米粒子(Ag NPs)。稳定。作为还原剂和封盖剂。与对照(30 ~ 60%)相比,玉米(Zea mays)、甘氨酸(Glycine max)和西芹(Cicer arietinum)的发芽率提高了90%,并促进了植株的生长。果实介导的Ag NPs的HRTEM图像显示颗粒分散良好。XRD衍射图证实了Ag NPs的晶体性质,fcc晶格点分别为101、111、200、220和311,平均晶粒尺寸为19.1275±1.73 nm。另一方面,果皮介导的银纳米粒子粒径范围为10 ~ 20 nm,平均晶粒尺寸为19.09±1.71 nm。FTIR光谱证实了由果皮提取物合成的Ag NPs中存在着k C=C- h、k CH2、k C=O(拉伸)、k C=C(拉伸)、k C- h(弯曲)、k C-O(弯曲)。Ag NPs对革兰氏阳性菌(金黄色葡萄球菌)和阴性菌(肺炎克雷伯氏菌)均有潜在的抗菌作用。
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引用次数: 3
期刊
Kuwait Journal of Science & Engineering
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