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PEMBANDINGAN KEKUATAN TARIK TULANGAN DENGAN MENGGUNAKAN ALAT BRINEL DAN MENGGUNAKAN UTM (UNIVERSAL TEST MACHINE)

Poli-Teknologi Vol 11, No 1 (2012)
Publisher : Politeknik Negeri Jakarta

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Abstract

Brinnel portable equipment is the most practical tool used in the field to determine the tensile strength of reinforcement. Basically brinnel validity of the tool is still very doubtful, as well as tools that existed at the Laboratory brinnel State Polytechnic of Jakarta. Based on these problems, research needs to determine the validity of the tool. The research was conducted by comparing the tensile strength test results between testing with tools brinnel and with UTM (Universal Test Machine). This test uses a test specimen plain rebars of 8 mm and 10 mm and 10 mm threaded bars, 13 mm and 16 mm. The length of the test object for testing using the UTM is 300 mm while for testing using a tool which is 700 mm brinel. From the test results comparing the data obtained between the tensile strength testing using the UTM and testing using tools brinnel. From testing the difference of tensile strength test results are quite significant. Testing with tools brinnel have lower results than testing with UTM with a difference of about 30%. Keywords: tensile strength, brinnel tools, Universal Test Machine

Serum Biomarkers For Hepatocellular Carcinoma (Short Review)

Indonesian Journal of Cancer Vol 3, No 2 (2009): Apr - Jun 2009
Publisher : "Dharmais" Cancer Center Hospital

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Abstract

Hepatocellular carcinoma (HCC) atau kanker hati adalah salah satu dari kanker yang paling umum dan menjadi penyebab utama kematian di negara-negara Asia. HCC biasanya berkembang pada pasien dengan penyakit hati kronis dan sirosis. Pengamatan HCC pada pasien sirosis biasanya dilakukan menggunakan ?-fetoprotein (AFP) dan ultrasonografi. Akan tetapi, sensitivitas AFP untuk deteksi HCC sangat rendah, sedangkan penggunaan ultrasonografi cukup mahal dan sangat tergantung pada keahlian operator. Hal inilah yang menjadi ide dasar tentang perlunya mencari suatu strategi baru (biomarker baru) dalam mendeteksi HCC secara dini. Biomarker yang ideal harus lebih sensitif, spesifik, noninvasif, murah, dan dapat diterima oleh pasien. Berdasarkan tinjauan literatur yang kami lakukan (2001-2009), dilaporkan beberapa penemuan biomarker baru yang cukup menjanjikan, seperti AFP-L3, des-gamma carboxyprothrombin (DCP), golgi protein 73 (GP73), glypican-3 (GPC3), squamous cell carcinoma antigen (SCCA), transforming growth factor-?1 (TGF?b1), insulin-like growth factor-II (IGF-II), insulin-like growth factor-binding protein-2 (IGFBP-2), human cervical cancer oncogene (HCCR), hepatocyte growth factor (HGF), KL-6 and ?-acid glycoprotein (AAG). Akan tetapi, penggunaannya secara klinis atau uji validasi belum pernah dilaporkan. Beberapa kendala dan keterbatasan yang dilaporkan dalam penemuan biomarker ini antara lain jumlah sampel yang digunakan kurang memadai, metoda analisis yang beragam (heterogenity), terbatas pada wilayah tertentu, predictive analysis biomarker, dan masih sedikitnya studi longitudinal untuk mengevaluasi kemampuan biomarkers dalam mendeteksi penyakit pada taraf preklinik. Uji klinik dan metoda validasi yang tepat saat ini menunggu lahirnya suatu generasi biomarker baru untuk pasien HCC.Kata kunci: Hepatocellular carcinoma (HCC), biomarker, metoda pengujian

Direct and Indirect Effect of TNFα and IFNγ Toward Apoptosis in Breast Cancer Cells

Molecular and Cellular Biomedical Sciences Vol 2, No 2 (2018)
Publisher : Cell and BioPharmaceutical Institute

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Abstract

Background: Breast cancer (BC) is the leading cause of death cancer in women. Cancer therapies using TNFα and IFNγ have been recently developed by direct effects and activation of immune responses. This study was performed to evaluate the effects of TNFα and IFNγ directly, and TNFα and IFNγ secreted by Conditioned Medium-human Wharton’s Jelly Mesenchymal Stem Cells (CM-hWJMSCs) toward apoptosis of BC cells (MCF7).Materials and Methods: BC cells were induced by TNFα and IFNγ in 175 and 350ng/mL, respectively. CM-hWJMSCs were produced by co-culture hWJMSCs and NK cells that secreted TNFα, IFNγ, perforin (Prf1), granzyme B (GzmB) for treating BC cells. The BC cells were treated with CM-hWJMSCs in 50%. The expression of apoptotic genes Bax, p53, and the antiapoptotic gene Bcl-2 were determined using RT-PCR.Results: TNFα and IFNγ at concentration of 350 ng/mL induced higher Bax expression compared to 175 ng/mL. TNFα and IFNγ 350 ng/mL, 175 ng/mL induced p53 expression, whilst TNFα and IFNγ at 350 ng/mL decreased Bcl-2 expression. Perf1, GzmB, TNFα and IFNγ-containing CM-hWJMSCs induced significantly apoptosis percentage, induced Bax expression, but did not effect p53, Bcl-2 expression.Conclusion: TNFα and IFNγ directly induce Bax, p53, decrease Bcl-2 gene expression. The Prf1, GzmB, TNFα, IFNγ-containing CM-hWJMSCs induce apoptosis and Bax expression.Keywords: breast cancer, Wharton’s Jelly mesenchymal stem cells, TNFα, IFNγ

Penyuntikan Human Wharton’s Jelly Mesenchymal Stem Cells terhadap Perbaikan Fungsi Testis pada Tikus Tua Fisiologis (HUMAN WHARTON’S JELLY MESENCHYMAL STEM CELLS INJECTION AMELIORATE TESTICULAR FUNCTION ON PHYSIOLOGICAL AGING MALE RATS)

Jurnal Veteriner Vol 19 No 3 (2018)
Publisher : Faculty of Veterinary Medicine, Udayana University and Published in collaboration with the Indonesia Veterinarian Association

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Abstract

The most common therapy on men who suffered fertility decline due to aging was called “T Therapy”, but that’s therapy has long-term risks of sexual dysfunction, metabolic syndrome, prostate, and cardiovascular system. Stem cells are an alternative therapy can be used for ameliorate testicular fuction because of their ability to differentiate into various cell types. The aim of this study was to evaluate the injection of hWJ-MSC in physiologic aging male rats on testicular function. This study was used 3 young male rats (8-12 weeks) and 6 physiological aging male rats (22-24 months) which divided into 3 groups, (i) the young rats, (ii) physiological aging male rats, and (iii) physiological aging male rats that injected with hWJ-MSCs. The young rat group did not give any treatment, physiological aging male rats received NaCl (0.9%) 0.4 mL, and the treatment group received 1x106 cells/kg BW of hWJ-MSCs. The observations were performed on the macroscopical and histological analysis. The result indicates that the younger group had the lowest body weight (154.6 g) and the percentage of the testis weight on the body weight was highest (2.2%) compared to the other groups (P>0.05). The physiological aging rats group had the smallest tubule (9726.9 ìm2) with a largest interstitial area (1117.1 ìm2) compared the other groups (P>0.05). After injection of hWJ-MSC, the tubule area became wider followed by narrowing of the interstitial area (P>0.05). The difference in the body weights is due to the different age of the rat. Improvement of tubule area and interstitial area due to the ability of hWJ-MSCs to improve spermatogenic cells within the tubule. Injection of hWJ-MSCs has been shown to increase fertility in aging rats.