scholarly journals PENGARUH DESINFEKSI BASIS GIGI TIRUAN RESIN AKRILIK POLIMERISASI PANAS DENGAN KLORHEKSIDIN DAN MINYAK JARAK (Ricinus Communis Oil) TERHADAP KEKUATAN TRANSVERSAL

2021 ◽  
Vol 13 (2) ◽  
pp. 151-156
Author(s):  
Ade Irma Khairani Lubis ◽  
Putri Welda Utami Ritonga

Desinfeksi gigi tiruan yang teratur biasanya dapat mencegah pertumbuhan mikroorganisme yang tidak diinginkan ini dan masalah klinis yang terkait, seperti denture stomatitis. Metode desinfeksi untuk gigi tiruan termasuk metode mekanis, kimia dan kombinasi. Metode desinfeksi kimia terbukti lebih baik bagi pemakai gigi tiruan. Klorheksidin 0,2% adalah desinfektan kimia yang sering digunakan untuk gigi tiruan karena bersifat bakterisida dan fungisida. Salah satu bahan alternatif yang memiliki sifat biokompatibilitas dan bersifat bakterisida dan fungisida adalah minyak jarak. Kekuatan transversal dianggap sebagai sifat mekanis yang sangat dipertimbangkan untuk semua bahan kedokteran gigi karena kekuatan transversal menunjukkan kekuatan atau ketahanan bahan tersebut. Tujuan penelitian ini adalah untuk mengetahui nilai dan pengaruh desinfeksi gigi tiruan resin akrilik polimerisasi panas dengan klorheksidin dan minyak jarak (Ricinus Communis oil) terhadap kekuatan transversal. Rancangan penelitian ini adalah eksperimental laboratoris. Sampel pada penelitian ini menggunakan resin akrilik polimerisasi panas dengan ukuran 64×10×3,3 mm untuk perhitungan kekuatan transversal dengan jumlah seluruh sampel 30 sampel. Sampel didesinfeksi dengan khlorheksidin dan minyak jarak dengan simulasi 3, 4, dan 5 tahun. Hasil penelitian ini menunjukkan bahwa tidak ada pengaruh desinfeksi gigi tiruan resin akrilik polimerisasi panas dengan klorheksidin 0,2% dan minyak jarak terhadap kekuatan transversal. Disimpulkan bahwa tidak ada pengaruh desinfeksi dalam minyak jarak 10% dan klorheksidin 0,2% selama 3, 4 dan 5 tahun terhadap kekuatan transversal.

2013 ◽  
Vol 40 (5) ◽  
pp. 375-380 ◽  
Author(s):  
L. A. P. Pinelli ◽  
A. A. B. Montandon ◽  
S. C. T. Corbi ◽  
T. A. Moraes ◽  
L. M. G. Fais

Author(s):  
D.C. Hixson ◽  
J.C. Chan ◽  
J.M. Bowen ◽  
E.F. Walborg

Several years ago Karasaki (1) reported the production of type C virus particles by Novikoff ascites hepatocarcinoma cells. More recently, Weinstein (2) has reported the presence of type C virus particles in cell cultures derived from transplantable and primary hepatocellular carcinomas. To date, the biological function of these virus and their significance in chemically induced hepatocarcinogenesis are unknown. The present studies were initiated to determine a possible role for type C virus particles in chemically induced hepatocarcinogenesis. This communication describes results of studies on the biological and surface properties of type C virus associated with Novikoff hepatocarcinoma cells.Ecotropic and xenotropic murine leukemia virus (MuLV) activity in ascitic fluid of Novikoff tumor-bearing rats was assayed in murine sarcoma virus transformed S+L- mouse cells and S+L- mink cells, respectively. The presence of sarcoma virus activity was assayed in non-virus-producing normal rat kidney (NRK) cells. Ferritin conjugates of concanavalin A (Fer-Con wheat germ agglutinin (Fer-WGA), and Ricinus communis agglutinins I and II (Fer-RCAI and Fer-RCAII) were used to probe the structure and topography of saccharide determinants present on the viral envelope.


Author(s):  
Robert E. Nordquist ◽  
J. Hill Anglin ◽  
Michael P. Lerner

A human breast carcinoma cell line (BOT-2) was derived from an infiltrating duct carcinoma (1). These cells were shown to have antigens that selectively bound antibodies from breast cancer patient sera (2). Furthermore, these tumor specific antigens could be removed from the living cells by low frequency sonication and have been partially characterized (3). These proteins have been shown to be around 100,000 MW and contain approximately 6% hexose and hexosamines. However, only the hexosamines appear to be available for lectin binding. This study was designed to use Concanavalin A (Con A) and Ricinus Communis (Ricin) agglutinin for the topagraphical localization of D-mannopyranosyl or glucopyranosyl and D-galactopyranosyl or DN- acetyl glactopyranosyl configurations on BOT-2 cell surfaces.


1997 ◽  
Vol 24 (10) ◽  
pp. 788-790 ◽  
Author(s):  
Y. KULAK ◽  
A. ARIKAN ◽  
E. KAZAZOGLU

1988 ◽  
Vol 60 (02) ◽  
pp. 182-187 ◽  
Author(s):  
Morio Aihara ◽  
Ken Tamura ◽  
Ryuko Kawarada ◽  
Keizou Okawa ◽  
Yutaka Yoshida

SummaryThe adhesion of human fixed washed platelets (FWP) to collagen was decreased after treatment with Serratia marcescens protease (SP), which removed 95% of the glycocalicin from platelet membrane glycoprotein (GP) lb. However, the diminished adhesion of SP treated FWP to collagen could still be increased in the presence of purified von Willebrand factor (vWF). This ability of vWF to increase FWP adhesion to collagen is defined as collagen cofactor (CCo). The adhesion of FWP to collagen was not affected by a monoclonal antibody (MAb) to GP Ilb/IIIa (10E5), that inhibits ADP and collagen induced platelet aggregation. On the other hand, it was decreased by 50% by a MAb to GP lb (6D1), that inhibits ristocetin induced platelet aggregation. Adhesion of FWP in buffer to collagen was completely inhibited by Ricinus communis agglutinin I or concanavalin A, while Lens culinalis agglutinin and wheat germ agglutinin showed 50% inhibition. The FWP adhesion to collagen in the presence of vWF (normal plasma) was unaffected by MAbs to GP Ilb/IIIa (10E5, P2, HPL1) but was decreased to 32-38% by MAbs to GP lb (6D1, AN51, HPL11). A MAb to vWF (CLB-RAg 35), that inhibits ristocetin induced binding of vWF to platelets, decreased the CCo of normal plasma by 70%. The MAb, CLB-RAg 201, that inhibits the binding of vWF to collagen, completely inhibited the CCo of normal plasma. In conclusion, our data suggest that (1) GP lb has a partial role in FWP adhesion to collagen; (2) the binding of vWF to collagen is required for the expression of CCo; (3) CCo is partly mediated through GP lb; but (4) other platelet membrane protein(s) besides GP lb or GP Ilb/IIIa must also be involved in FWP-vWF-collagen interactions.


1986 ◽  
Vol 55 (03) ◽  
pp. 338-341 ◽  
Author(s):  
H Takahashi ◽  
W Tatewaki ◽  
M Hanano ◽  
R Nagayama ◽  
A Shibata

SummaryPlatelet-type von Willebrand’s disease (vWD) is a bleeding disorder characterized by a heightened interaction between platelets and von Willebrand factor (vWF) as the result of an intrinsic platelet abnormality (probably in GPIb). Platelet aggregability was nearly normal in response to thrombin, wheat germ agglutinin and Ricinus communis agglutinin in this disorder. Unmodified platelets showed no aggregation upon the addition of peanut agglutinin. Partially purified human vWF induced little aggregation of washed patient platelets, but the aggregation was greatly enhanced in the presence of plasma devoid of vWF. Monoclonal antibodies directed against GPIb and GPIIb/IIIa as well as EDTA completely inhibited vWF-induced aggregation. These results indicate that human vWF induces aggregation of platelet-type vWD platelets in the presence of divalent cations and some plasma cofactor(s), and that both GPIb and GPIIb/IIIa are involved in this aggregation.


Reproduction ◽  
2000 ◽  
pp. 325-335 ◽  
Author(s):  
A Calvo ◽  
LM Pastor ◽  
S Bonet ◽  
E Pinart ◽  
M Ventura

Lectin histochemistry was used to perform in situ characterization of the glycoconjugates present in boar testis and epididymis. Thirteen horseradish peroxidase- or digoxigenin-labelled lectins were used in samples obtained from healthy fertile boars. The acrosomes of the spermatids were stained intensely by lectins with affinity for galactose and N-acetyl-galactosamine residues, these being soybean, peanut and Ricinus communis agglutinins. Sertoli cells were stained selectively by Maackia ammurensis agglutinin. The lamina propria of seminiferous tubules showed the most intense staining with fucose-binding lectins. The Golgi area and the apical part of the principal cells of the epididymis were stained intensely with many lectins and their distribution was similar in the three zones of the epididymis. On the basis of lectin affinity, both testis and epididymis appear to have N- and O-linked glycoconjugates. Spermatozoa from different epididymal regions showed different expression of terminal galactose and N-acetyl-galactosamine. Sialic acid (specifically alpha2,3 neuraminic-5 acid) was probably incorporated into spermatozoa along the extratesticular ducts. These findings indicate that the development and maturation of boar spermatozoa are accompanied by changes in glycoconjugates. As some lectins stain cellular or extracellular compartments specifically, these lectins could be useful markers in histopathological evaluation of diseases of boar testis and epididymis.


2012 ◽  
Vol 14 (2) ◽  
pp. 167-176
Author(s):  
M.S. Silva ◽  
S.A. Ramalho ◽  
L.C. Macedo ◽  
J.J.S. Moreira ◽  
N. Narain ◽  
...  

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