This page has only limited features, please log in for full access.
In recent decades, harmful algal blooms (HABs) have been significantly affecting environments, aquatic ecosystems, and human health, as well as damaging economies, especially near rivers and lakes, and in coastal regions. Microcystis and Anabaena are two genera of harmful cyanobacteria that will often predominate during toxic microalgal blooms. In this study, we employ a method for control and mitigation of HABs by microalgal cell instability using different types of aminoclays (ACs). Allelopathic interactions between the two strains of algae are studied in mono-culture, co-culture, and filtrated cell-free medium in the presence of the ACs. The growth of the Anabaena strain is significantly reduced by the cyanobacterial strains in the co-culture media, and both are significantly affected by the Acs’-enhanced algicidal activity. Anabaena sp. KVSF7 shows higher sensitivity against the ACs than does Microcystis sp. KW. In this way, the algicidal activity of ACs is harnessed, the effects of which are in the order of aluminum aminoclay (AlAC) > magnesium aminoclay (MgAC) > calcium aminoclay (CaAC). The ammonium sites in the ACs carry positive charges to induce instability of HABs along with the electrostatic attraction between algal cells and AC. Therefore, the utilization of the algicidal activity of the ACs can effectively reduce HABs, especially on cyanobacterial blooms.
Minh Nguyen; Vu Bui; Chi-Yong Ahn; Hee-Mock Oh; Jin-Soo Koh; Ju-Young Moon; Young-Chul Lee. Loading Effects of Aminoclays in Co-Culture of Two Cyanobacterial Microcystis and Anabaena Species as an Algicidal Role. Applied Sciences 2021, 11, 5607 .
AMA StyleMinh Nguyen, Vu Bui, Chi-Yong Ahn, Hee-Mock Oh, Jin-Soo Koh, Ju-Young Moon, Young-Chul Lee. Loading Effects of Aminoclays in Co-Culture of Two Cyanobacterial Microcystis and Anabaena Species as an Algicidal Role. Applied Sciences. 2021; 11 (12):5607.
Chicago/Turabian StyleMinh Nguyen; Vu Bui; Chi-Yong Ahn; Hee-Mock Oh; Jin-Soo Koh; Ju-Young Moon; Young-Chul Lee. 2021. "Loading Effects of Aminoclays in Co-Culture of Two Cyanobacterial Microcystis and Anabaena Species as an Algicidal Role." Applied Sciences 11, no. 12: 5607.
The aim of this study was to evaluate the growth-promoting effects of the combination of magnesium aminoclay (MgAC) and amino-functionalized carbon dots (N(CD)s) on Tetraselmis sp. cultures with an emphasis on N(CD)s. To that end, simply sol-gel-synthesized MgAC and one-pot carbonization-synthesized N(CD)s were utilized. The as-prepared N(CD)s possessed the expected amino-functional groups, exhibited strong blue emission with bright luminescence, and showed a quantum yield (QY) of 5.69%. The maximum specific growth rate and biomass productivity were achieved with the combination of 0.1 g L−1 MgAC and 40 μg mL−1 N(CD)s, which afforded improvements in lipid and protein accumulation relative to the control, whereas carbohydrate accumulation slightly decreased. At low concentrations (0.1 g L−1), MgAC demonstrated growth stimulation. The N(CD) addition to the MgAC-containing medium further supported the Tetraselmis sp. cultures in counteracting the effects of UV radiation and in improving photosynthesis activity. In these ways, increased growth and biomass productivity under UV irradiation and enhanced pigment contents under the light-irradiance condition were obtained. Therefore, use of the MgAC-N(CD) combination as a culture-medium supplement is a promising method for microalgae biorefinery applications.
Minh Kim Nguyen; Mi-Kyung Kim; Ju-Young Moon; Vinh Van Tran; Young-Chul Lee. Influence of chitosan-based carbon dots added in MgAC-containing culture medium on green alga Tetraselmis sp. Environmental Biology of Fishes 2021, 33, 765 -775.
AMA StyleMinh Kim Nguyen, Mi-Kyung Kim, Ju-Young Moon, Vinh Van Tran, Young-Chul Lee. Influence of chitosan-based carbon dots added in MgAC-containing culture medium on green alga Tetraselmis sp. Environmental Biology of Fishes. 2021; 33 (2):765-775.
Chicago/Turabian StyleMinh Kim Nguyen; Mi-Kyung Kim; Ju-Young Moon; Vinh Van Tran; Young-Chul Lee. 2021. "Influence of chitosan-based carbon dots added in MgAC-containing culture medium on green alga Tetraselmis sp." Environmental Biology of Fishes 33, no. 2: 765-775.
Photobiomodulation Therapy (PBMT) is a novel modality using irradiation with light-power-intensity light. Recently, applications of PBMT have been broadened to thousands of people around the world for various medical conditions and dermatological conditions. Normally, light sources used in PBMT are non-coherent light (Light Emitting Diodes-LED) or coherent light (lasers). LED-light-source-based devices offer several advantages compared with laser devices, including ease of home use, simultaneous irradiation of a large area of tissue, availability for wearable devices, much lower price, and enhanced safety. Thus, various LED-based devices for dermatological and cosmetics applications have been designed and developed and sold on the global market. However, LED therapy still confronts many challenges that limit its applications and cause human-health concerns. Herein, we provide a critical review of the various applications of LED therapy in the fields of dermatology and beauty: skin rejuvenation, acne treatment, scarring prevention, hair restoration, fat reduction and cellulite treatment, and tooth whitening. Also, the challenges to the development of LED therapy and its action mechanisms are identified and discussed in detail. Additionally, future perspectives for development of LED light phototherapy are pointed.
Vinh Van Tran; Minhe Chae; Ju-Young Moon; Young-Chul Lee. Light emitting diodes technology-based photobiomodulation therapy (PBMT) for dermatology and aesthetics: Recent applications, challenges, and perspectives. Optics & Laser Technology 2020, 135, 106698 .
AMA StyleVinh Van Tran, Minhe Chae, Ju-Young Moon, Young-Chul Lee. Light emitting diodes technology-based photobiomodulation therapy (PBMT) for dermatology and aesthetics: Recent applications, challenges, and perspectives. Optics & Laser Technology. 2020; 135 ():106698.
Chicago/Turabian StyleVinh Van Tran; Minhe Chae; Ju-Young Moon; Young-Chul Lee. 2020. "Light emitting diodes technology-based photobiomodulation therapy (PBMT) for dermatology and aesthetics: Recent applications, challenges, and perspectives." Optics & Laser Technology 135, no. : 106698.
Titanium dioxide nanoparticles (TiO2 NPs) have some limitations, such as their low surface area, high bandgap energy, and low recycling ability. To overcome these limitations, TiO2 can be prepared in microscale/macroscale structures. TiO2 microscale structures, in comparison with TiO2 nanopowder, have higher surface areas, more tunable pore structures, and better top photocatalytic activity. In contrast, for TiO2 macroscale structures, although the surface area is lower than TiO2 nanopowder in many cases, they still achieve similar or better photocatalytic performance due to their unique properties. Moreover, both TiO2 microscale and macroscale structures can be easily recovered from reaction media. The difference between these two types of TiO2 structures is a function not only of size but also of the preparation process. Every type of TiO2 structure has its own advantages and disadvantages, as will be discussed further in the following pages. Future perspectives on this research field also will be discussed.
Vu Khac Hoang Bui; Vinh Van Tran; Ju-Young Moon; Duckshin Park; Young-Chul Lee. Titanium Dioxide Microscale and Macroscale Structures: A Mini-Review. Nanomaterials 2020, 10, 1190 .
AMA StyleVu Khac Hoang Bui, Vinh Van Tran, Ju-Young Moon, Duckshin Park, Young-Chul Lee. Titanium Dioxide Microscale and Macroscale Structures: A Mini-Review. Nanomaterials. 2020; 10 (6):1190.
Chicago/Turabian StyleVu Khac Hoang Bui; Vinh Van Tran; Ju-Young Moon; Duckshin Park; Young-Chul Lee. 2020. "Titanium Dioxide Microscale and Macroscale Structures: A Mini-Review." Nanomaterials 10, no. 6: 1190.
In this study, we evaluated the low-doses loading effects of magnesium aminoclay (MgAC) on Microcystis sp. KW cultures. In the presence of MgAC at concentrations ranging from 0.01 to 0.1 g/L, the cell growth of Microcystis sp. KW was enhanced relative to a non-MgAC case. At these low concentrations, MgAC also showed the capability of improving microalgal metabolite accumulation. Additionally, the amount of MgAC remaining in the culture media could be reused in the re-cultivation process just by adding a minimal amount of additional MgAC. And in fact, after reuse, the microalgal cultures maintained their growth efficiency. Therefore, integrated MgAC-aided microalgae cultivation is herein recommended as a promisingly efficient method for microalgae biorefinery applications.
Minh Kim Nguyen; Ju-Young Moon; Young-Chul Lee. Loading effects of low doses of magnesium aminoclay on microalgal Microcystis sp. KW growth, macromolecule productions, and cell harvesting. Biomass and Bioenergy 2020, 139, 105619 .
AMA StyleMinh Kim Nguyen, Ju-Young Moon, Young-Chul Lee. Loading effects of low doses of magnesium aminoclay on microalgal Microcystis sp. KW growth, macromolecule productions, and cell harvesting. Biomass and Bioenergy. 2020; 139 ():105619.
Chicago/Turabian StyleMinh Kim Nguyen; Ju-Young Moon; Young-Chul Lee. 2020. "Loading effects of low doses of magnesium aminoclay on microalgal Microcystis sp. KW growth, macromolecule productions, and cell harvesting." Biomass and Bioenergy 139, no. : 105619.
Nowadays, nanotechnology and its related industries are becoming a rapidly explosive industry that offers many benefits to human life. However, along with the increased production and use of nanoparticles (NPs), their presence in the environment creates a high risk of increasing toxic effects on aquatic organisms. Therefore, a large number of studies focusing on the toxicity of these NPs to the aquatic organisms are carried out which used algal species as a common biological model. In this review, the influences of the physio-chemical properties of NPs and the response mechanisms of the algae on the toxicity of the NPs were discussed focusing on the “assay” studies. Besides, the specific algal toxicities of each type of NPs along with the NP-induced changes in algal cells of these NPs are also assessed. Almost all commonly-used NPs exhibit algal toxicity. Although the algae have similarities in the symptoms under NP exposure, the sensitivity and variability of each algae species to the inherent properties of each NPs are quite different. They depend strongly on the concentration, size, characteristics of NPs, and biochemical nature of algae. Through the assessment, the review identifies several gaps that need to be further studied to make an explicit understanding. The findings in the majority of studies are mostly in laboratory conditions and there are still uncertainties and contradictory/inconsistent results about the behavioral effects of NPs under field conditions. Besides, there remains unsureness about NP-uptake pathways of microalgae. Finally, the toxicity mechanisms of NPs need to be thoughtfully understood which is essential in risk assessment.
Minh Kim Nguyen; Ju-Young Moon; Young-Chul Lee. Microalgal ecotoxicity of nanoparticles: An updated review. Ecotoxicology and Environmental Safety 2020, 201, 110781 .
AMA StyleMinh Kim Nguyen, Ju-Young Moon, Young-Chul Lee. Microalgal ecotoxicity of nanoparticles: An updated review. Ecotoxicology and Environmental Safety. 2020; 201 ():110781.
Chicago/Turabian StyleMinh Kim Nguyen; Ju-Young Moon; Young-Chul Lee. 2020. "Microalgal ecotoxicity of nanoparticles: An updated review." Ecotoxicology and Environmental Safety 201, no. : 110781.
Particulate matter (PM) is one of the most important factors causing serious skin diseases, due to its generation of reactive oxygen species (ROS) over the course of long-term exposure. As a source of natural antioxidants, Opuntia humifusa (O. humifusa) is a potential candidate for the design of advanced formulations to prevent PM’s harmful effects. Unfortunately, its high viscosity does not allow it to be utilized in these formulations. In this present study, a new approach to the extract of O. humifusa using high-power microwave treatment, namely microwave-assisted O. humifusa extract (MA-OHE), was investigated. The results indicated that MA-OHE not only is a reasonable viscosity extract, but also enhances O. humifusa’s antioxidant properties. Additionally, this study also found that MA-OHE exhibited outstanding antioxidant and anti-inflammatory activities in eliminating PM’s effects, due to suppression of AhR degradation, ROS production, and COX-2 and MMP-9 expression in HaCaT keratinocytes. It is believed that MA-OHE is a potential cosmeceutical ingredient that could be utilized to prevent PM-induced skin oxidative stress and inflammation.
Ju-Young Moon; Le Thi Nhu Ngoc; Minhe Chae; Vinh Van Tran; Young-Chul Lee. Effects of Microwave-Assisted Opuntia humifusa Extract in Inhibiting the Impacts of Particulate Matter on Human Keratinocyte Skin Cell. Antioxidants 2020, 9, 271 .
AMA StyleJu-Young Moon, Le Thi Nhu Ngoc, Minhe Chae, Vinh Van Tran, Young-Chul Lee. Effects of Microwave-Assisted Opuntia humifusa Extract in Inhibiting the Impacts of Particulate Matter on Human Keratinocyte Skin Cell. Antioxidants. 2020; 9 (4):271.
Chicago/Turabian StyleJu-Young Moon; Le Thi Nhu Ngoc; Minhe Chae; Vinh Van Tran; Young-Chul Lee. 2020. "Effects of Microwave-Assisted Opuntia humifusa Extract in Inhibiting the Impacts of Particulate Matter on Human Keratinocyte Skin Cell." Antioxidants 9, no. 4: 271.
The measurement of deposited aerosol particles in the respiratory tract via in vivo and in vitro approaches is difficult due to those approaches’ many limitations. In order to overcome these obstacles, different computational models have been developed to predict the deposition of aerosol particles inside the lung. Recently, some remarkable models have been developed based on conventional semi-empirical models, one-dimensional whole-lung models, three-dimensional computational fluid dynamics models, and artificial neural networks for the prediction of aerosol-particle deposition with a high accuracy relative to experimental data. However, these models still have some disadvantages that should be overcome shortly. In this paper, we take a closer look at the current research trends as well as the future directions of this research area.
Vu Khac Hoang Bui; Ju-Young Moon; Minhe Chae; Duckshin Park; Young-Chul Lee. Prediction of Aerosol Deposition in the Human Respiratory Tract via Computational Models: A Review with Recent Updates. Atmosphere 2020, 11, 137 .
AMA StyleVu Khac Hoang Bui, Ju-Young Moon, Minhe Chae, Duckshin Park, Young-Chul Lee. Prediction of Aerosol Deposition in the Human Respiratory Tract via Computational Models: A Review with Recent Updates. Atmosphere. 2020; 11 (2):137.
Chicago/Turabian StyleVu Khac Hoang Bui; Ju-Young Moon; Minhe Chae; Duckshin Park; Young-Chul Lee. 2020. "Prediction of Aerosol Deposition in the Human Respiratory Tract via Computational Models: A Review with Recent Updates." Atmosphere 11, no. 2: 137.
Ultraviolet (UV) radiation has been demonstrated to cause skin disorders, including sunburn and relative symptoms of prolonged exposure. It has been reported that sunscreens have beneficial effects in reducing the incidence of skin disorders (sunburn, skin aging, and immunosuppression) through their ability to absorb, reflect, and scatter UV. Many commercial products have recently been manufactured from not only usual organic and inorganic UV filters, but also hybrid and botanical ingredients using typical formulations (emulsion, gel, aerosol, and stick). Particularly, these products have been supplemented with several preeminent properties to protect against the negative effects of not only UVB, but also UVA. However, the use of sunscreen has faced many challenges, including inducing photoallergic dermatitis, environment pollution, and deficiency of vitamin D production. Therefore, consumers should efficiently apply suitable products to improve sun protection. as well as to avoid the side effects of sunscreen.
Le Thi Nhu Ngoc; Vinh Van Tran; Ju-Young Moon; Minhe Chae; Duckshin Park; Young-Chul Lee; Ngoc; Tran; Moon; Chae; Park; Lee. Recent Trends of Sunscreen Cosmetic: An Update Review. Cosmetics 2019, 6, 64 .
AMA StyleLe Thi Nhu Ngoc, Vinh Van Tran, Ju-Young Moon, Minhe Chae, Duckshin Park, Young-Chul Lee, Ngoc, Tran, Moon, Chae, Park, Lee. Recent Trends of Sunscreen Cosmetic: An Update Review. Cosmetics. 2019; 6 (4):64.
Chicago/Turabian StyleLe Thi Nhu Ngoc; Vinh Van Tran; Ju-Young Moon; Minhe Chae; Duckshin Park; Young-Chul Lee; Ngoc; Tran; Moon; Chae; Park; Lee. 2019. "Recent Trends of Sunscreen Cosmetic: An Update Review." Cosmetics 6, no. 4: 64.
In this study, aminoclays/poly(vinyl alcohol) (AC/PVA) hydrogel films were prepared after three cycles of the freeze-thawing process. The corresponding hydrogel films were characterized using gel fraction, swelling ratio, and scanning electron microscopy (SEM). The results indicate that the presence of magnesium aminoclay (MgAC) can improve the water-absorption utility of PVA hydrogel films, and that the water-absorption utility of zinc aminoclay (ZnAC)/PVA hydrogel films was similar to that of the pure PVA hydrogel films. The higher water uptake of the MgAC/PVA hydrogel films was confirmed by scanning electron microscopy (SEM), and was attributed to the larger pore size compared to ZnAC/PVA and pure PVA hydrogels films. Regarding antimicrobial utility, both MgAC/PVA and ZnAC/PVA hydrogel films exhibited antimicrobial effects against Escherichia coli and Staphylococcus aureus, although the ZnAC/PVA hydrogel films manifested higher activity in general. Similarly, while the presence of silver nanowires increased the antibacterial activity, it did not reduce the gel fraction or swelling ratio of the MgAC/PVA hydrogel films. Open image in new window
Vu Khac Hoang Bui; Duckshin Park; Minh Kim Nguyen; Ju-Young Moon; Young-Chul Lee. Preparation of Antimicrobial Aminoclays/Poly(vinyl alcohol) Nanocomposite Hydrogel Films by Freeze-Thawing Method. Macromolecular Research 2019, 27, 523 -525.
AMA StyleVu Khac Hoang Bui, Duckshin Park, Minh Kim Nguyen, Ju-Young Moon, Young-Chul Lee. Preparation of Antimicrobial Aminoclays/Poly(vinyl alcohol) Nanocomposite Hydrogel Films by Freeze-Thawing Method. Macromolecular Research. 2019; 27 (6):523-525.
Chicago/Turabian StyleVu Khac Hoang Bui; Duckshin Park; Minh Kim Nguyen; Ju-Young Moon; Young-Chul Lee. 2019. "Preparation of Antimicrobial Aminoclays/Poly(vinyl alcohol) Nanocomposite Hydrogel Films by Freeze-Thawing Method." Macromolecular Research 27, no. 6: 523-525.
Antioxidants (AOs) play a crucial role in the protection and maintenance of health and are also integral ingredients in beauty products. Unfortunately, most of them are sensitive due to their instability and insolubility. The use of liposomes to protect AOs and expand their applicability to cosmeceuticals, thereby, is one of the most effective solutions. Notwithstanding their offered advantages for the delivery of AOs, liposomes, in their production and application, present many challenges. Here, we provide a critical review of the major problems complicating the development of liposomes for AO delivery. Along with issues related to preparation techniques and encapsulation efficiency, the loss of protective function and inefficiency of skin permeability are the main disadvantages of liposomes. Corresponding development strategies for resolving these problems, with their respective advantages and drawbacks, are introduced, discussed in some depth, and summarized in these pages as well. Advanced liposomes have a vital role to play in the development and delivery of AOs in practical cosmeceutical product applications.
Vinh Van Tran; Ju-Young Moon; Young-Chul Lee. Liposomes for delivery of antioxidants in cosmeceuticals: Challenges and development strategies. Journal of Controlled Release 2019, 300, 114 -140.
AMA StyleVinh Van Tran, Ju-Young Moon, Young-Chul Lee. Liposomes for delivery of antioxidants in cosmeceuticals: Challenges and development strategies. Journal of Controlled Release. 2019; 300 ():114-140.
Chicago/Turabian StyleVinh Van Tran; Ju-Young Moon; Young-Chul Lee. 2019. "Liposomes for delivery of antioxidants in cosmeceuticals: Challenges and development strategies." Journal of Controlled Release 300, no. : 114-140.
Antioxidants play a crucial role in the protection and maintenance of health and are also integral ingredients in beauty products. The active antioxidants possess numerous outstanding features that are useful for cosmetic formulations. However, there are many problems related to their instability and insolubility that have been restricting their practical applications and which has led to the advent of core-shell materials, mainly lipid nanoparticles and nanoemulsions as one of the most effective solutions to protect those antioxidants and broaden their applicability to cosmetic products. Unfortunately, the production and application of core-shell materials in the cosmetics industry face many other challenges as well. Here, some of the main problems relating to the loss of the protective function as well as the limitations of material’s preparation techniques are reviewed and discussed in depth. Simultaneously, development strategies for resolving the corresponding problems are underlined. These strategies have been meeting the development needs of the cosmetics industry in the present and will continue to do so for at least the near future. In addition, strategies for stimulating the progress of the cosmetics industry are anticipated.
Vinh Van Tran; Tuan Loi Nguyen; Ju-Young Moon; Young-Chul Lee. Core-shell materials, lipid particles and nanoemulsions, for delivery of active anti-oxidants in cosmetics applications: challenges and development strategies. Chemical Engineering Journal 2019, 368, 88 -114.
AMA StyleVinh Van Tran, Tuan Loi Nguyen, Ju-Young Moon, Young-Chul Lee. Core-shell materials, lipid particles and nanoemulsions, for delivery of active anti-oxidants in cosmetics applications: challenges and development strategies. Chemical Engineering Journal. 2019; 368 ():88-114.
Chicago/Turabian StyleVinh Van Tran; Tuan Loi Nguyen; Ju-Young Moon; Young-Chul Lee. 2019. "Core-shell materials, lipid particles and nanoemulsions, for delivery of active anti-oxidants in cosmetics applications: challenges and development strategies." Chemical Engineering Journal 368, no. : 88-114.