Impact of Organic Agriculture on Runoff and Soil Erosion in a Silty Soil

Xavier Morvan,Loic Verbeke,Sebastien Laratte 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Farmers and private traders response to rice markets liberalization in Bangladesh

Hossain, Mohammad Ismail,Verbeke, Wim Jungseok Research Institute of International Logis 2008 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.6 No.1

Rice is staple food for Bangladeshi people. Although rice markets were liberalized in 1992, the government continued to intervene in this sector. This study examines the farmers' and private traders' response in liberalized rice marketing system in two regions. 40 farmers and 20 traders were interviewed by using a structural questionnaire for collecting the necessary information. The liberalization of the rice market, in particular, has been embraced more by the private traders then by the farmers. Although there has been a rapid emergence of private traders, the emergence of a vibrant trading sector that would fill the gap left by the state has been slow. The rice market is segmented with the private traders supplying different market circuits. Farmers on the other have not responded positively ? 새 the lack of capital, lack of storage facilities, lack of market information, dominance of intermediaries and low price during the harvest period. Most of the farmers are unwilling to expand their acreage due to the family requirements of other crops. In rural remote areas where the road infrastructure is poor, private sector marketing activities have not yet emerged. Thus government can foster private participation and market integration by improving the road and storage infrastructure. Furthermore, government needs to take measures that strengthen the agricultural price and marketing information system targeted at both farmers and traders.

Biocompatibility study of lithium disilicate and zirconium oxide ceramics for esthetic dental abutments

Céline Brunot-Gohin,Jean-Luc Duval,Sandra Verbeke,Kayla Belanger,Isabelle Pezron,Gérard Kugel,Dominique Laurent-Maquin,Sophie Gangloff,Christophe Egles 대한치주과학회 2016 Journal of Periodontal & Implant Science Vol.46 No.6

Purpose: The increasing demand for esthetically pleasing results has contributed to the use of ceramics for dental implant abutments. The aim of this study was to compare the biological response of epithelial tissue cultivated on lithium disilicate (LS2) and zirconium oxide (ZrO2) ceramics. Understanding the relevant physicochemical and mechanical properties of these ceramics will help identify the optimal material for facilitating gingival wound closure. Methods: Both biomaterials were prepared with 2 different surface treatments: raw and polished. Their physicochemical characteristics were analyzed by contact angle measurements, scanning white-light interferometry, and scanning electron microscopy. An organotypic culture was then performed using a chicken epithelium model to simulate peri-implant soft tissue. We measured the contact angle, hydrophobicity, and roughness of the materials as well as the tissue behavior at their surfaces (cell migration and cell adhesion). Results: The best cell migration was observed on ZrO2 ceramic. Cell adhesion was also drastically lower on the polished ZrO2 ceramic than on both the raw and polished LS2. Evaluating various surface topographies of LS2 showed that increasing surface roughness improved cell adhesion, leading to an increase of up to 13%. Conclusions: Our results demonstrate that a biomaterial, here LS2, can be modified using simple surface changes in order to finely modulate soft tissue adhesion. Strong adhesion at the abutment associated with weak migration assists in gingival wound healing. On the same material, polishing can reduce cell adhesion without drastically modifying cell migration. A comparison of LS2 and ZrO2 ceramic showed that LS2 was more conducive to creating varying tissue reactions. Our results can help dental surgeons to choose, especially for esthetic implant abutments, the most appropriate biomaterial as well as the most appropriate surface treatment to use in accordance with specific clinical dental applications.

Biocompatibility study of lithium disilicate and zirconium oxide ceramics for esthetic dental abutments

Brunot-Gohin, Celine,Duval, Jean-Luc,Verbeke, Sandra,Belanger, Kayla,Pezron, Isabelle,Kugel, Gerard,Laurent-Maquin, Dominique,Gangloff, Sophie,Egles, Christophe Korean Academy of Periodontology 2016 Journal of Periodontal & Implant Science Vol.46 No.6

Purpose: The increasing demand for esthetically pleasing results has contributed to the use of ceramics for dental implant abutments. The aim of this study was to compare the biological response of epithelial tissue cultivated on lithium disilicate ($LS_2$) and zirconium oxide ($ZrO_2$) ceramics. Understanding the relevant physicochemical and mechanical properties of these ceramics will help identify the optimal material for facilitating gingival wound closure. Methods: Both biomaterials were prepared with 2 different surface treatments: raw and polished. Their physicochemical characteristics were analyzed by contact angle measurements, scanning white-light interferometry, and scanning electron microscopy. An organotypic culture was then performed using a chicken epithelium model to simulate peri-implant soft tissue. We measured the contact angle, hydrophobicity, and roughness of the materials as well as the tissue behavior at their surfaces (cell migration and cell adhesion). Results: The best cell migration was observed on $ZrO_2$ ceramic. Cell adhesion was also drastically lower on the polished $ZrO_2$ ceramic than on both the raw and polished $LS_2$. Evaluating various surface topographies of $LS_2$ showed that increasing surface roughness improved cell adhesion, leading to an increase of up to 13%. Conclusions: Our results demonstrate that a biomaterial, here $LS_2$, can be modified using simple surface changes in order to finely modulate soft tissue adhesion. Strong adhesion at the abutment associated with weak migration assists in gingival wound healing. On the same material, polishing can reduce cell adhesion without drastically modifying cell migration. A comparison of $LS_2$ and $ZrO_2$ ceramic showed that $LS_2$ was more conducive to creating varying tissue reactions. Our results can help dental surgeons to choose, especially for esthetic implant abutments, the most appropriate biomaterial as well as the most appropriate surface treatment to use in accordance with specific clinical dental applications.

Farmers and private traders response to rice markets liberalization in Bangladesh

Mohammad Ismail  Hos,Wim Verbeke 인하대학교 정석물류통상연구원 2008 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.6 No.1

Rice is staple food for Bangladeshi people. Although rice markets were liberalized in 1992, the government continued to intervene in this sector. This study examines the farmers" and private traders" response in liberalized rice marketing system in two regions. 40 farmers and 20 traders were interviewed by using a structural questionnaire for collecting the necessary information. The liberalization of the rice market, in particular, has been embraced more by the private traders then by the farmers. Although there has been a rapid emergence of private traders, the emergence of a vibrant trading sector that would fill the gap left by the state has been slow. The rice market is segmented with the private traders supplying different market circuits. Farmers on the other have not responded positively ? 새 the lack of capital, lack of storage facilities, lack of market information, dominance of intermediaries and low price during the harvest period. Most of the farmers are unwilling to expand their acreage due to the family requirements of other crops. In rural remote areas where the road infrastructure is poor, private sector marketing activities have not yet emerged. Thus government can foster private participation and market integration by improving the road and storage infrastructure. Furthermore, government needs to take measures that strengthen the agricultural price and marketing information system targeted at both farmers and traders.

Injectable, spontaneously assembling, inorganic scaffolds modulate immune cells in vivo and increase vaccine efficacy

Kim, Jaeyun,Li, Weiwei Aileen,Choi, Youngjin,Lewin, Sarah A,Verbeke, Catia S,Dranoff, Glenn,Mooney, David J Nature Publishing Group, a division of Macmillan P 2015 Nature biotechnology Vol.33 No.1

Implanting materials in the body to program host immune cells is a promising alternative to transplantation of cells manipulated ex vivo to direct an immune response, but doing so requires a surgical procedure. Here we demonstrate that high-aspect-ratio, mesoporous silica rods (MSRs) injected with a needle spontaneously assemble in vivo to form macroporous structures that provide a 3D cellular microenvironment for host immune cells. In mice, substantial numbers of dendritic cells are recruited to the pores between the scaffold rods. The recruitment of dendritic cells and their subsequent homing to lymph nodes can be modulated by sustained release of inflammatory signals and adjuvants from the scaffold. Moreover, injection of an MSR-based vaccine formulation enhances systemic helper T cells T<SUB>H</SUB>1 and T<SUB>H</SUB>2 serum antibody and cytotoxic T-cell levels compared to bolus controls. These findings suggest that injectable MSRs may serve as a multifunctional vaccine platform to modulate host immune cell function and provoke adaptive immune responses.

A Generalized Double Diamond Approach to the Global Competitiveness of Korea and Singapore

문휘창 ( H . Chang Moon,Alan M . Rugman,Alain Verbeke ) 한국국제경영학회 1997 한국국제경영학회 학술발표회 발표논문집 Vol.1997 No.1

Validation of Octanoate Breath Test for Measuring Gastric Emptying in Rats

( Ingrid Demedts ),( Christophe Vanormelingen ),( Hubert Van Billoen ),( Tim Vanuytsel ),( Ricard Farre ),( Tatsuhiro Masaoka ),( Alfons Verbruggen ),( Kristien Verbeke ),( Pieter Vanden Berghe ),( Ja 대한소화기기능성질환·운동학회 2013 Journal of Neurogastroenterology and Motility (JNM Vol.19 No.2

Background/Aims Lack of simple and repeatable tests hampers gastric emptying studies in rats. The aim of this study was to adapt the 14C octanoate solid gastric emptying breath test for application in rats, and to validate it against radioscintigraphic method. Methods After ingestion of a meal containing 3 mCi 99mTc and 2 μCi 14C-octanoate, 23 male Wistar rats were placed on a gamma cam-era in a airflow container. Scintigraphic images were taken at regular intervals. The amount of 14CO2 in a regularly replaced hyamine hydroxide solution, capturing CO2 in the outflow air, was counted using liquid scintillation spectrometry. 99mTc gastric retention curves and 14CO2-excretion curves were fitted to their respective data. Three rats underwent the same procedures after administration of atropine. Results Overall Tr10% (time at which 10% of the original amount of 99mTc remained in the stomach) was 355 ± 64 minutes; Te90% (time at which 90% of total amount of 14CO2 was excreted) was 325 ± 106 minutes. Their correlation coefficient was 0.71, R-square 0.50 and P < 0.005. Tr1/2 (50% of original amount of 99mTc remained) was 124 ± 28 minutes; Te1/2 (50% of total amount of 14CO2 excreted) 114 ± 32 minutes. Their correlation coefficient was 0.83 with R-square of 0.69 and P < 0.00005. In 12 immobilized animals correlation was even better: correlation coefficient 0.84; R-square 0.71 and P < 0.001 (Tr10% was 388 ± 117 minutes; Te90% 532 ± 219 minutes; Tr1/2 of 165 ± 54 minutes; Te1/2 of 175 ± 67 minutes). Atropine significantly lengthened all emptying times: 904 ± 307 and 1461 ± 684 minutes for Tr10% and Te90%, respectively; and 432 ± 117 minutes for Tr1/2 and 473 ± 190 minutes for Te1/2. Conclusions We adapted and validated the 14C-octanoate gastric emptying breath test for application in rats.