R. Susanti

The Development of Guided Inquiry-Based Students’ Worksheet in Cell Material for Senior High School Students

This research was aimed to develop guided inquiry-based students’ worksheet in cell materials forstudents in senior high school. It has the characteristics of valid, readable, and executable. This researchwas a Research and Development (RD 2) theactivities based on syntax model of guided inquiry learning; 3) the material is related to real example; 4)the illustration picture in worksheets was real and 5) the display of worksheet in full color. The averagepercentage of validity to the worksheet was 83.06%. The percentage score of the worksheet was 85.31%with executability of 93.18%. Based on the results, it can be concluded that this worksheet has severalcharacteristics and valid category to be used. It also had good readability and executability to thestudents.

Vitamin A modulation toward IL-12, IFN-γ production and macrophage activity in malaria disease

Malaria is a global disease and kills over 30 % to 40 % of children in endemic areas or developing countries, including Indonesia. Healing rates of malaria is affected by micronutrient body consumption such as vitamin A. Vitamin A plays an important role in enhancing the immune system. Vitamin A deficiency may weaken the body’s resistance to infectious diseases. This study aims to examine potent dose of vitamin A that induces an immune response as an immunomodulator using experimental mice infected with Plasmodium berghei through cellular immunity parameters analysis. This research was an experimental laboratory, designed as Post Test-Only Control Group Design. Experimental male Swiss Strain mice, which were eight weeks old, healthy and weighed 28.80 g to 31.20 g, were treated with standard feeding and drinking through ad libitum. A total of 24 mice which had been adapted for a week were randomly divided into four groups: K (control); P1 (solvent of vitamin A); P2 (treated with vitamin A and doses of 3 00...

ANALISIS SEKUEN GEN GLUTATION PEROKSIDASE (GPX1) SEBAGAI DETEKSI STRES OKSIDATIF AKIBAT INFEKSI MYCOBACTERIUM TUBERCULOSIS

Glutation merupakan antioksidan yang berperan dalam fungsi imun, dan diekspresikan secara genetik oleh urutan gen yang membentuk protein enzim Glutation Peroxidase (GPx1). Bila ekspresi gen berubah maka terjadi perubahan fungsi glutation dan kerentanan terhadap stress oksidatif. Metode yang digunakan adalah Kasus-kontrol. Sampel yang digunakan adalah sampel darah. Kelompok kasus adalah sampel darah pasien tuberkulosis paru sedangkan kelompok kontrol adalah sampel darah orang sehat. Pemeriksaan gen Glutation peroxidase (GPx1) menggunakan metode Polymerase Chain Reaction (PCR) untuk melihat pita DNA pada pasien tuberkulosis par serta elektroforesis produk PCR-RFLP gen GPx1 kelompok sampel tuberkulosis. Hasil penelitian menunjukkan bahwa tidak terdapat hubungan yang bermakna antara polimorfisme gen GPx1 (p=0,365) pasein tuberkulois dengan individu sehat, sehingga tidak dapat digunakan sebagai alat deteksi kerentanan terhadap stress oksidatif pada pasien tuberkulosis. Perlu penelitian lanjutan yang menggunakan sampel lebih besar dan populasi etnik yang berbeda.

Pengaruh Pemberian Vitamin A terhadap Penurunan Parasitemia Mencit Strain Swiss yang diinfeksi Plasmodium berghei

Vitamin A merupakan vitamin yang berperan sebagai imunostimulan. Penelitian ini bertujuan untuk mengetahui apakah pemberian vitamin A dapat menurunkan parasitemia Plasmodium berghei pada mencit strain Swiss. Penelitian ini menggunakan 24 ekor mencit strain Swiss jantan berumur 6-8 minggu dengan berat badan 20-30 gram/ekor. Penelitian dilaksanakan secara eksperimental dengan menggunakan time series design. Dalam penelitian ini dilakukan perlakuan berupa pemberian vitamin A dengan 3 variasi dosis yaitu 0 IU/g BB, 35 IU/g BB dan 70 IU/g BB serta kelompok kontrol negatif dengan masing- masing kelompok terdiri dari 6 ekor mencit. Vitamin A diberikan 1 jam sebelum penginfeksian dan mencit dirawat sampai mencit pada kelompok kontrol negatif mati. Sediaan apus darah tipis dibuat 2 hari sekali dan parasitemia dihitung dengan pengecatan Giemsa. Data parasitemia dianalisis dengan ANOVA.Untuk hasil yang signifikan maka dilanjutkan dengan uji lanjut Post hoc pada taraf kesalahan 1%. Hasil uji ANOVA untuk kelompok perlakuan B, C dan D diperoleh nilai p <0,001 pada masing-masing kelompok perlakuan. Hal tersebut menyatakan bahwa adanya perbedaan yang signifikan pada perlakuan yang diberikan. Begitu juga untuk uji lanjut Post hoc yang telah dilakukan diperoleh nilai p < 0,001. Dapat disimpulkan bahwa pemberian vitamin A berpengaruh terhadap penurunan parasitemia Plasmodium berghei pada mencit strain Swiss. Vitamin A is a vitamin that acts as an immunostimulant. This research aims to determine whether the administration of vitamin A can reduce parasitaemia of Plasmodium berghei in Switzerland strain mice. This research used 24 mice Switzerland strain mice 6-8 weeks old weighing 20-30 grams/tail. Research conducted experimentally by using time series design. In this research, the provision of vitamin A treatment with 3 doses of variation is 0 IU/g BW, 35 IU/g BW and 70 IU/g BW as well as the negative control group, with each group consisting of 6 mice. Vitamin A was given 1 hour before infection then treated mice to mice in the negative control group died. Thin blood smears were made 2 days and parasitaemia was calculated by Giemsa staining. Parasitaemia data were analyzed with ANOVA. Significant results then followed by a further test Post hoc at 1% error level. ANOVA test results for the treatment group B, C and D obtained value of p <0.001 for each treatment group. It is claimed that there are significant differences in the treatment given. Likewise for further Post hoc testing that has been done obtained value of p <0.001. It can be concluded that the administration of vitamin A affects the reduction in parasitaemia of Plasmodium berghei in Switzerland strain mice.