Peracetylation as a Means of Enhancing in Vitro Bioactivity and Bioavailability of Epigallocatechin-3-Gallate

2006 ◽  
Vol 34 (12) ◽  
pp. 2111-2116 ◽  
Author(s):  
Joshua D. Lambert ◽  
Shengmin Sang ◽  
Jungil Hong ◽  
Seok-Joo Kwon ◽  
Mao-Jung Lee ◽  
...  
Keyword(s):  
In Vitro Bioactivity

Temulawak (Curcuma  xanthorrhizaRoxb.) belongs to the family Zingiberaceae, has been empirically used as herbal medicines. The research was aimed to evaluate three promising lines of Temulawak based on their high bioactive contents (xanthorrhizol and curcuminoid) and its in vitro bioactivity (antioxidant and toxicity), and to obtain information on agrobiophysic environmental condition which produced high bioactive compounds. The xanthorrhizol and curcuminoid contents were measured by HPLC. In vitro antioxidant and toxicity were determined by DPPH (1,1-diphenyl-2-picryl-hydrazyl) method and BSLT (Brine Shrimp Lethality Test). The result showed that promising line A produced the highest yield of bioactive and bioactivity, i.e. 0.157 and 0.056 g plant-1of xanthorrizol and curcuminoid respectively. The IC50 of antioxidant activity was 65.09 mg L-1and LC50of toxicity was 69.05 mg L-1. In this study, Cipenjo had the best temulawak performance than two other locations. According to the agrobiophysic parameters, Cipenjo environmental condition was suitable for temulawak cultivation with temperature 28-34 ºC, rainfall ± 223.97 mm year-1 and sandy clay soil. Keywords: antioxidant, curcuminoid, promising lines, temulawak, xanthorrhizol

1970 ◽  
Vol 40 (2) ◽  
Author(s):  
Waras Nurcholis ◽  
Edy Djauhari Purwakusumah ◽  
Mono Rahardjo ◽  
Latifah K. Darusman
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Brine Shrimp ◽  
Clay Soil ◽  
Herbal Medicines ◽  
Environmental Condition ◽  
In Vitro Bioactivity ◽  
The Family ◽  
Promising Line

Temulawak (Curcuma  xanthorrhizaRoxb.) belongs to the family Zingiberaceae, has been empirically used as herbal medicines. The research was aimed to evaluate three promising lines of Temulawak based on their high bioactive contents (xanthorrhizol and curcuminoid) and its in vitro bioactivity (antioxidant and toxicity), and to obtain information on agrobiophysic environmental condition which produced high bioactive compounds. The xanthorrhizol and curcuminoid contents were measured by HPLC. In vitro antioxidant and toxicity were determined by DPPH (1,1-diphenyl-2-picryl-hydrazyl) method and BSLT (Brine Shrimp Lethality Test). The result showed that promising line A produced the highest yield of bioactive and bioactivity, i.e. 0.157 and 0.056 g plant-1of xanthorrizol and curcuminoid respectively. The IC50 of antioxidant activity was 65.09 mg L-1and LC50of toxicity was 69.05 mg L-1. In this study, Cipenjo had the best temulawak performance than two other locations. According to the agrobiophysic parameters, Cipenjo environmental condition was suitable for temulawak cultivation with temperature 28-34 ºC, rainfall ± 223.97 mm year-1 and sandy clay soil. Keywords: antioxidant, curcuminoid, promising lines, temulawak, xanthorrhizol

Chemical Characterization and In Vitro Bioactivity of Apple Bark Extracts Obtained by Subcritical Water

2021 ◽  
Author(s):  
Jaroslava Švarc-Gajić ◽  
Víctor Cerdà ◽  
Cristina Delerue-Matos ◽  
Pavle Mašković ◽  
Sabrina Clavijo ◽  
...  
Keyword(s):  
Subcritical Water ◽  
Chemical Characterization ◽  
In Vitro Bioactivity

Phytochemical investigations and in vitro bioactivity screening on Melia azedarach L. leaves extract from Nepal

2021 ◽  
Author(s):  
Stefano Dall'Acqua ◽  
Shyam Sharan Shrestha ◽  
Irene Ferrarese ◽  
Stefania Sut ◽  
Gokhan Zengin ◽  
...  
Keyword(s):  
Melia Azedarach ◽  
In Vitro Bioactivity

scholarly journals Synthesis and Characterization of Silver–Strontium (Ag-Sr)-Doped Mesoporous Bioactive Glass Nanoparticles

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 34
Author(s):  
Shaher Bano ◽  
Memoona Akhtar ◽  
Muhammad Yasir ◽  
Muhammad Salman Maqbool ◽  
Akbar Niaz ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Composite Coatings ◽  
Antibacterial Properties ◽  
Bone Diseases ◽  
Osteogenic Potential ◽  
Diffusion Method ◽  
Charge Composition ◽  
In Vitro Bioactivity ◽  
Mesoporous Bioactive Glass

Biomedical implants are the need of this era due to the increase in number of accidents and follow-up surgeries. Different types of bone diseases such as osteoarthritis, osteomalacia, bone cancer, etc., are increasing globally. Mesoporous bioactive glass nanoparticles (MBGNs) are used in biomedical devices due to their osteointegration and bioactive properties. In this study, silver (Ag)- and strontium (Sr)-doped mesoporous bioactive glass nanoparticles (Ag-Sr MBGNs) were prepared by a modified Stöber process. In this method, Ag+ and Sr2+ were co-substituted in pure MBGNs to harvest the antibacterial properties of Ag ions, as well as pro-osteogenic potential of Sr2 ions. The effect of the two-ion concentration on morphology, surface charge, composition, antibacterial ability, and in-vitro bioactivity was studied. Scanning electron microscopy (SEM), X-Ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) confirmed the doping of Sr and Ag in MBGNs. SEM and EDX analysis confirmed the spherical morphology and typical composition of MBGNs, respectively. The Ag-Sr MBGNs showed a strong antibacterial effect against Staphylococcus carnosus and Escherichia coli bacteria determined via turbidity and disc diffusion method. Moreover, the synthesized Ag-Sr MBGNs develop apatite-like crystals upon immersion in simulated body fluid (SBF), which suggested that the addition of Sr improved in vitro bioactivity. The Ag-Sr MBGNs synthesized in this study can be used for the preparation of scaffolds or as a filler material in the composite coatings for bone tissue engineering.

scholarly journals Mesoporous Properties of Bioactive Glass Synthesized by Spray Pyrolysis with Various Polyethylene Glycol and Acid Additions

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 618
Author(s):  
Tzu-Yu Peng ◽  
Pei-Yun Tsai ◽  
May-Show Chen ◽  
Yuichi Mine ◽  
Shan-Hua Wu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Bioactive Glass ◽  
Spray Pyrolysis ◽  
Mesoporous Structure ◽  
High Specific Surface Area ◽  
Process Time ◽  
In Vitro Bioactivity ◽  
One Pot

Mesoporous bioactive glass (MBG) has a high specific surface area, promoting the reaction area, thereby improving the bioactivity; thus, MBG is currently gaining popularity in the biomaterial field. Spray pyrolysis (SP) is a one-pot process that has the advantages of shorter process time and better particle bioactivity, therefore, MBG was prepared by SP process with various polyethylene glycol (PEG, molecular weight ranged from 2000–12,000) and acid (HCl and CH3COOH) additions. In vitro bioactivity and mesoporous properties of the so-obtained MBG were investigated. The experimental results showed that all the MBG exhibited amorphous and mesoporous structure. Increasing the molecular weight of PEG can improve the mesoporous structure and bioactivity of MBG. Whereas optimized MBG was prepared with suitable concentration of PEG and CH3COOH. In the present work, MBG synthesized via spray pyrolysis by adding 5 g of PEG with a molecular weight of 12,000 and 50 mL of CH3COOH exhibited the best in vitro bioactivity and mesoporous structure.

scholarly journals Predicting Organ Toxicity Using in Vitro Bioactivity Data and Chemical Structure

2017 ◽  
Vol 30 (11) ◽  
pp. 2046-2059 ◽  
Author(s):  
Jie Liu ◽  
Grace Patlewicz ◽  
Antony J. Williams ◽  
Russell S. Thomas ◽  
Imran Shah
Keyword(s):  
Chemical Structure ◽  
In Vitro Bioactivity ◽  
Organ Toxicity

Mixed phase bioceramics in the CaMgSi2O6 – MoO3 system: Mechanical properties and in-vitro bioactivity

2021 ◽  
Author(s):  
Wen-Fan Chen ◽  
Yu-Sheng Tseng ◽  
Yu-Man Chang ◽  
Ji Zhang ◽  
Yun-Han Su ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mixed Phase ◽  
In Vitro Bioactivity

Thermal analysis and in vitro bioactivity of bioactive glass–alumina composites

2011 ◽  
Vol 62 (1) ◽  
pp. 118-129 ◽  
Author(s):  
Xanthippi Chatzistavrou ◽  
Nikolaos Kantiranis ◽  
Eleana Kontonasaki ◽  
Konstantinos Chrissafis ◽  
Labrini Papadopoulou ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Bioactive Glass ◽  
In Vitro Bioactivity ◽  
Alumina Composites

Mn Blended Hydroxyapatite Nanoceramic: Bioactivity, Dielectric and Luminescence Studies

2013 ◽  
Vol 18 ◽  
pp. 43-59
Author(s):  
Megha Mahabole ◽  
Manjushree Bahir ◽  
Rajendra Khairnar
Keyword(s):  
Dielectric Constant ◽  
Calcium Ions ◽  
Nucleation And Growth ◽  
Partial Replacement ◽  
Apatite Structure ◽  
Manganese Ions ◽  
Photoluminescence Properties ◽  
In Vitro Bioactivity ◽  
Sbf Solution

Abstract: In this study, in-vitro bioactivity of manganese blended hydroxyapatite (Mn-HAp) pellets is carried out using simulated body fluid (SBF) solution. The incubated Mn-HAp samples are characterized by XRD, FTIR and SEM/EDAX. Dielectric and photoluminescence properties of Mn-HAp samples are studied as a function of incubation period in SBF. XRD profiles show that hexagonal apatite structure remains intact after partial replacement of calcium ions by manganese ions and even after incubation. The change in absorption due to phosphate group, depicted in FTIR spectra, for incubated samples confirms growth of apatite on Mn-HAp surface. SEM/ EDAX studies suggest that Mn-HAp surface promotes the growth of apatite without changing its structure due to apatite nucleation and growth on the surface of Mn-HAp. The value of dielectric constant of Mn-HAp increases after incubation. Increase in period of immersion in m-SBF leads to decrease in dielectric constant of manganese exchanged hydroxyapatite. The photoluminescence (PL) study reveals that the Mn-HAp can be used stable and efficient blue luminescent material.

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