Hibiscus Rosa-sinensis Extract Research Articles

Determination of Antimicrobial Activity of Cream Formulation Developed with Hibiscus rosa-sinensis Extract and Probiotic

Medicinal plants are an indispensable source of new and effective pharmaceutical products. In the study, the biological activities of water extract obtained from the H. rosa-sinensis leaf was determined and its potential for use in the pharmaceutical and cosmetic industries was investigated. Disc diffusion assay and micro-dilution method against clinical origin test microorganisms were used to assess biological activity. The Extract showed a zone of inhibition on the tested bacteria and yeasts in the 6.85 mm to 10.74 mm range. MIC and MBC or MFC values of the Extract was determined as 6.25-12.50 µg/µL and 12.50-50 µg/µL. Then, the cream formulation containing H. rosa-sinensis leaf water extract and/or human milk originated probiotic candidate Limosilactobacillus fermentum MA-7 strain have been developed. The Extract and probiotic containing cream formulations showed variable antibacterial and antifungal effects on the tested clinical originated microorganisms. The highest inhibition zone diameters of Cream + Extract + Probiotic formulation group was obtained against Candida glabrata RSKK 04019 (9.09 mm) and Escherichia coli O157:H7 (9.04 mm). The results indicate that L. fermentum MA-7 and H. rosa-sinensis water extract, alternative to synthetic antimicrobials, may be used as a natural bioactive ingredient in daily personal care and clinical applications in the near future.

Green formulation of Ag nanoparticles by Hibiscus rosa-sinensis: Introducing a navel chemotherapeutic drug for the treatment of liver cancer

An eco-friendly biosynthesized Ag NPs immobilized Hibiscus rosa-sinensis extract has been introduced. The as-prepared nanoparticles were characterized using UV–Vis, SEM, and FT-IR analysis. In the FT-IR test, the presence of many antioxidant compounds with related bonds caused the excellent condition for reducing of silver in the silver nanoparticles. In UV–Vis, the clear peak in the wavelength of 428 nm indicated the formation of silver nanoparticles. The synthesized nanoparticles had very low cell viability and high anti-liver cancer activities dose-dependently against pleomorphic hepatocellular carcinoma (SNU-387), hepatic ductal carcinoma (LMH/2A), morris hepatoma (McA-RH7777), and novikoff hepatoma (N1-S1 Fudr) cell lines without any cytotoxicity on the normal cell line (HUVEC). The synthesized nanoparticles inhibited half of the DPPH molecules in the concentration of 78 µg/mL. Perhaps notable anti-liver cancer activities of the synthesized nanoparticles against common liver cancer cell lines are linked to their antioxidant activities.

Morphological, structural and antibacterial behavior of eco-friendly of ZnO/TiO2 nanocomposite synthesized via Hibiscus rosa-sinensis extract

An eco-friendly preparation technique was used to synthesize zinc oxide (ZnO) from Hibiscus rosa-sinensis extract. In addition, titanium dioxide (TiO2) was combined with ZnO in a nanocomposite. The structural investigation was done by x-ray diffraction (XRD) and the hexagonal symmetry of ZnO was detected. The calculated crystallite size of ZnO increased from 31.3 to 34.4 nm. Furthermore, functional groups of organic residues were detected by chemical analysis of Fourier transform infrared spectroscopy (FTIR). The rod grains of ZnO and TiO2 were detected by scanning electron microscope (SEM). Further, ZnO grains increased in length from 0.87 to 4.5 μm. Besides, the width increased from 0.27 to 2 μm (from ZnO to ZnO/TiO2 respectively). Furthermore, TiO2 grains decreased in length from 536 to 337 nm, while the width decreased from 136 to 122 nm. A transmission electron microscope (TEM) was used to investigate the particles of ZnO/TiO2 composite. ZnO particles were detected as ellipsoidal with length and width around 123 and 91 respectively. Besides the sphere particles of TiO2 with a diameter around 25 nm. The eco-friendly composites without harmful chemicals could be suggested for biological applications. The inhibition zone values of E. coli and S. aureus microorganisms was 61.4 ± 3.6 and 39.6 ± 4.4 and has been increased by by doping by TiO2 to 82.3 ± 6.7 and 54.3 ± 2.8.

Sonochemical synthesis of amphoteric Cu0-Nanoparticles using Hibiscus rosa-sinensis extract and their applications for degradation of 5-fluorouracil and lovastatin drugs

Recent studies reported the detection of numerous emerging and active pharmaceutical constituents in the ground and surface water. To address these issues, the present study reported the ultrasound-assisted synthesis of zero-valent copper (Cu0) nanoparticles using Hibiscus rosa-sinensis extract as reducing and stabilizing agent. The catalyst was characterized using XRD, SEM, EDX, PSA, BET, etc., and the results revealed that sonochemical synthesis technique influenced the crystallinity with controlled growth of Cu0. While the hard ligand hydroxyl group (−OH) reduces the Cu2+ to Cu0 and soft ligand carbonyl group (CO) present in the oxidized polyphenols helps in capping and stabilizing the Cu0-nanoparticles. During the ultrasound application, continuous release of Cu+ from Cu0 promoted the degradation by producing OH and O2•− radicals. Approx. 91.3 % and 93.2 % degradation efficiencies were achieved for 5-fluorouracil and lovastatin. The results showed that Cu0 nanoparticles were amphoteric in nature and the synergy calculation revealed that ultrasound has a direct influence on degradation of drugs which are difficult to degrade/mineralize using conventional techniques. Based on the results, a possible degradation mechanism of drug molecules in the presence of oxidants, zero-valent copper and ultrasound has been proposed.

Green Synthesis of Zinc based Nanoparticles for Thermal Industry based Applications

Spinel ZnAl2O4 nanoparticles were prepared effectively by simplistic, economical microwave heating method using Hibiscus rosa-sinensis extract as reducing agent. The samples were successfully characterized by XRD pattern, EDX spectra, FT-IR analysis, HR-SEM analysis, and VSM instrumentation techniques. XRD, EDX and FT-IR results demonstrated that the products contain a pure single-phase spinel structure lacking of other secondary phase impurities. SEM results confirmed the spherical shaped nanoparticle morphology of the sample. Magnetic characterization property was confirmed by VSM analysis. VSM hysteresis loop established the superparamegnetism of the sample and the magnetization (Ms) value of ZnAl2O4 is 0.023 emu/g.

Antioxidant and Antidiabetic Effect of Hibiscus rosasinensis Flower Extract on Streptozotocin Induced Experimental Rats-a Dose Response Study

The present study was designed to evaluate the antidiabetic and antioxidant effect of Hibiscus rosasinensis against streptozotocin induced diabetic rats. Streptozotocin (STZ) was administered as a single dose (40 mg/kg) to induce diabetes. The hypoglycemic activity of Hibiscus rosasinensis extract (HRSEt) was investigated in a dose dependent manner such as (125, 250 and 500 mg/kg bwt) by evaluating various biochemical parameters. The levels of blood glucose, carbohydrate metabolizing enzymes, TBARS, enzymatic and non-enzymatic antioxidants and lipid profiles were found to be significantly increased in diabetic rats when compared to control groups. Administration of extract in the treated groups showed altered changes in the above mentioned parameters and found that among the three doseses, 250 mg/kg showed best result when compared to other two doses. HRSEt possess antioxidant, hypoglycemic and hypolipidemic activity against streptozotocin induced diabetic rats. However the detailed mechanism(s) of action will require elucidating in further studies.