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Yanti,Yaya Rukayadi,Kwanhyoung Lee,Sunghwa Han,Jae-Kwan Hwang 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.2
Xanthorrhizol, a sesquiterpene isolated from Curcuma xanthorrhiza Roxb., was used to investigate its effect on reducing the saliva and multi-species oral biofilms consisting of Streptococcus mutans, Streptococcus sanguis, and Actinomyces viscosus by anti-biofilm and confocal laser scanning microscopy (CLSM) assays. Xanthorrhizol exhibited significant antibiofilm activity in the dose- and time-dependent manners. Exposure to 2 and 5 ㎍/㎖ xanthorrhizol for 30 min remained <50% of saliva and multi-species biofilms formed for 24 hr. In addition, exposure to 10 ㎍/㎖ xanthorrhizol for 30 min reduced 65 and 77% of 24 hr saliva and multi-species oral biofilms, respectively. CLSM results visually demonstrated that xanthorrhizol reduced bacterial viability in the saliva and multi-species oral biofilms. These results suggest that C. xanthorrhiza Roxb. containing xanthorrhizol with strong anti-biofilm activity can be employed as a plant source for oral care functional foods.
Yanti,Lee, Myoungsu,Kim, Daeyoung,Hwang, Jae-Kwan Pharmaceutical Society of Japan 2009 Biological & pharmaceutical bulletin Vol.32 No.10
<P><I>Porphyromonas gingivalis</I>, a type of Gram-negative periodontopathogen, causes periodontal disease by activating intracellular signaling pathways that produce excessive inflammatory responses such as matrix metalloproteinases (MMPs). Recently, we reported that panduratin A, a chalcone compound isolated from <I>Kaempferia pandurata</I> R<SMALL>OXB</SMALL>., caused the decreased levels of MMP-9 secretion, protein, and gene expression in human oral epidermoid KB cells exposed to <I>P. gingivalis</I> supernatant. In this study, we clarified if mitogen-activated protein kinase (MAPK) signaling mediated MMP-9 expression by examining the effect of specific MAPK inhibitors, <I>i.e.</I> U0126, SB203580, and SP600125, on <I>P. gingivalis</I> supernatant-stimulated MMP-9 expression in KB cells. We next elucidated the molecular mechanism by which panduratin A attenuated signaling pathways involved in MMP-9 expression by performing gelatin zymography, Western blotting, reverse transcription-polymerase chain reaction, and promoter assays. Exposure of KB cells to <I>P. gingivalis</I> supernatant up-regulated the expression of MMP-9 protein and gene, and activation of activator protein-1 (AP-1) element, MAPK phosphorylation (extracellular signal-related kinase 1/2 (ERK1/2), p38, and c-Jun N-terminal kinase (JNK)), and transcription factors (Elk1, c-Jun, and c-Fos). A JNK inhibitor (SP600125) significantly attenuated MMP-9 gene expression and AP-1 activity in KB cells in response to <I>P. gingivalis</I> supernatant. Similar to SP600125, panduratin A was found to strongly suppress the level of phosphorylated JNK and block AP-1 activity in <I>P. gingivalis</I> supernatant-stimulated KB cells. In summary, JNK and AP-1 are the major signaling for <I>P. gingivalis</I> supernatant-stimulated MMP-9 expression in KB cells, and panduratin A markedly down-regulates MMP-9 expression through inhibition of these signaling.</P>
Yanti,Oh, Hyun-In,Anggakusuma,Hwang, Jae-Kwan Pharmaceutical Society of Japan 2009 Biological & pharmaceutical bulletin Vol.32 No.1
<P>Periodontitis is initiated by accumulation of microbial plaque and activation of gingival inflammation through overexpression of matrix metalloproteinases (MMPs), leading to tissue destruction. Natural MMP inhibitors may be developed as therapeutic agents against periodontitis. In this study, panduratin A, a natural bioactive compound isolated from <I>Kaempferia pandurata</I> R<SMALL>OXB.</SMALL>, was used to test its <I>in vitro</I> inhibitory activity against MMP-9 secretion from <I>Porphyromonas gingivalis</I> supernatant-induced human oral epidermoid carcinoma KB cells. Gelatin zymography, Western blot and RT-PCR analyses were performed to evaluate MMP-9 expression. The gelatin zymograms revealed that the main gelatinase secreted by <I>P. gingivalis</I> supernatant-induced KB cells migrated at 92 kDa, representing MMP-9. MMP-9 protein and mRNA levels were significantly decreased after panduratin A treatment (<I>p</I><0.05). In contrast, panduratin A had no effect on tissue inhibitor of metalloproteinases (TIMP)-1 and TIMP-2 mRNA. Panduratin A also suppressed urokinase type plasminogen activator (uPA) mRNA expression. These results suggest that panduratin A could potentially prevent periodontal inflammation by decreasing the levels of MMP-9 protein and mRNA.</P>
Legal Protection of Indonesian Coral Reefs in Papua Province
Yanti Fristikawati (사) 이준국제법연구원 2009 Journal of East Asia and International Law Vol.2 No.2
Coral reefs are a source of marine diversity that must be protected, not only for therelationship between their ecosystem and other biota, but also for their economicvalue. Indonesia is an archipelagic country with 116 small islands and groups ofsmall islands that are susceptible to ecological damage. Indonesia possesses a greatdiversity of flora and fauna, including coral reefs. Indonesia’s sea territory is twothirdsthe size of its land territory, and much of the nation’s ecological diversity lieswithin this water expanse. As coral reefs form a part of Indonesia’s marine diversity,we must protect them. This paper will discuss Indonesian regulations pertaining tothe protection of coral reefs with a particular focus on Radja Ampat, Papua. Theprincipal sources of relevant Indonesian statutory law are Law No. 23 Year 1997,regarding Environmental Management, and Law No. 5 Year 1990, regardingBiological Diversity and Ecosystems. These laws may be used to protect marineenvironments, especially coral reefs. At the international level, the United NationsConvention on the Law of the Sea and the Convention on Biological Diversitycomplement the laws enacted by Indonesia. Radja Ampat is located in PapuaProvince, and is known as a premier diving site. Surveys have brought Raja Ampat’stotal number of confirmed species of coral to 537, representing an incredible 75% ofall known coral species. Sadly, marine pollution in Radja Amapt is decreasing boththe quality and quantity of coral reefs
( Hikma Yanti ),( Wasrin Syafii ),( Nyoman J Wistara ),( Fauzi Febrianto ),( Nam Hun Kim ) 한국목재공학회 2019 목재공학 Vol.47 No.2
This study aimed to increase the sugar and ethanol yield from the mengkuang plant biomass through biological and liquid hot water (LHW) pretreatment and their combination. The results showed that biological pretreatments with 5% inoculum of the fungus Trametes versicolor resulted in the highest alpha cellulose content incubated for 30 days, and 10% inoculum resulted in the lowest lignin content. LHW pretreatment decreased the hemicellulose content of pulps from 10.17% to 9.99%. T. versicolor altered the structure of the mengkuang pulp by degrading the lignin and lignocellulose matrix. The resulting delignification and cellulose degradation facilitate the hydrolysis of cellulose into sugars. The alpha cellulose content after biological-LHW pretreatment was higher (78.99%) compared to LHW-biological pretreatment (76.85%). Scanning electron microscopy analysis showed that biological-LHW combinated treatment degrades the cell wall structures. The ethanol yield for biological-LHW pretreated sample was observed 43.86% (13.11 g/L ethanol by weight of the substrate, which is much higher than that of LHW-biological pretreatment (34.02%; 9.097 g/L). The highest reducing sugar content about 45.10% was observed with a resulting ethanol content of 15.5 g/L at LHW pretreatment temperature of 180℃ for 30 min.
Legal Pluralism in Adat Land Conflict Resolution:A Case Study of Eastern Indonesia
Linda Yanti Sulistiawati 한국법제연구원 2019 KLRI journal of law and legislation Vol.9 No.2
This article examines legal pluralism in Indonesia relating to customary 'Adat' law. The case study research was conducted in the Manggarai area of Eastern Indonesia where Adat law is prevalent in resolving conflicts, alongside the national legal system. The article discusses in-depth, whether Indonesia's legal system effectively acknowledges the plural systems of law in use. By examining how these two systems of law are implemented, the article shows how customary systems are being used to resolve land conflict in the case of Manggarai. This study combines both a qualitative review of the literature and a case approach method to examine the five types of Adat land conflict in Manggarai in East Indonesia. The research findings show that in both theoretical literatures, as well as in the case studies of Manggarai, Adat law is acknowledged by the Indonesian legal system and also in the local community. This research is a useful reference for land conflicts in other areas where legal pluralism is in use.
( Hikma Yanti ),( Muh Yusram Massijaya ),( Tekat Dwi Cahyono ),( Eka Novriyanti ),( Apri Heri Iswanto ) 한국목재공학회 2019 목재공학 Vol.47 No.2
This research presents an improvement of the physical and mechanical properties of composite board (com-ply) made of Oriented Strand Board (OSB) coated with wood veneer of Pine (Pinus merkusii), Avocado (Persea Americana) and Mahogany (Swietenia mahogany). 1.5 mm thick veneers of those three wood types were adhered to the surface of OSB using two adhesive types: epoxy and isocyanate. The adhesive with the glue spread of 250 g m<sup>-2</sup> applied using single glue line was spread and then cold pressed with the pressure of 15 kg cm<sup>-2</sup> for 3 hours. The research result showed an improving dimension stability of com-ply, but not found on all parameters of physical property test. The moisture content seemed to be influenced by the com-ply type, yet not related to its thickness swelling, water absorption and linear expansion. The exception took place in the parallel linear expansion when immersed for 2 hours. The highest to the lowest increases of MOE and MOR were consecutively found on OSB coated with wood veneer of Pine, Mahogany and Avocado. However, the increases were statistically insignificant. The highest increasing screw hold power was found at the com-ply type AE (avocado veneer and epoxy adhesive) that was by 28%.
The anti-Alzheimer compounds from tempeh oil in LPS-induced neuronal Schwann cells
Limanjaya Eileen C.,SUBALI DIONYSIUS,Yanti Yanti 한국식품연구원 2022 Journal of Ethnic Foods Vol.9 No.-
Tempeh is a traditional fermented Indonesian food from white soybean. Tempe has better nutritional value than non-fermented white soybean. The aim of this study was to extract tempeh oil and analyze the inhibitory potency of Alzheimer-related gene expression in LPS-induced neuronal Schwann cells. Tempeh oil was extracted with Bligh Dyer method and was analyzed with PUFA identification, anticholinesterase activity, antioxidant activity, and quantitative PCR. Tempeh oil had a total yield of 7.14%, and PUFA identification found 8.37% omega-3. The anti-acetylcholinesterase activity showed that tempeh oil 25 µg/mL had the highest activity and 500 µg/mL in anti-butyrylcholinesterase activity. The quantitative PCR showed that tempeh oil had downregulated the gene expression of PSEN1, Gsk3b, cdk5,andTNF. From this study, tempeh oil may have the potential to lower the risk of Alzheimer’s disease by regulating certain gene traits.