Judul: Produksi Kolagenase dari Isolat Bacillus licheniformis F-11.1 dan F-11.4
Abstrak: Hydrolysis by collagenase enzyme could increase nutrition and function of food proteins. This research was conducted to produce collagenase enzyme from Bacillus licheniformis F-11.1 and F- 11.4. B. licheniformis isolate F-11.1 and F-11.4 were cultured in three types of production media, which is Luria Bertani (LB) media consisted of 5% collagen (LBC), 50% LB media consisted of 5% collagen (LBHC), and 5% collagen (CLG). The activity of collagenase, protein content, and cell turbidity of B. licheniformis F-11.1 and F-11.4 were measured every 5 hours during 50 hours incubation. The result showed that optimum collagenase production of B. licheniformis isolate F- 11.1 was reached in LBC and LBHC media with activity of 2,057 U/mg and 2,037 U/mg, respectively. Optimum collagenase production of B. licheniformis isolate F-11.4 was reached in LBC media with activity of 4,695 U/mg. Isolate F-11.4 in LBHC media possesed the optimum collagenase activity of 2,811 U/mg. CLG media gave optimum collagenase activity of B. licheniformis F-11.1 and F-11.4 at 0,807 U/mg and 0,306 U/mg respectively. These research concluded that LBC and LBHC media was the best choice for collagenase production of B. licheniformis F-11.1 and F-11.4.
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Judul: Zimogram aktivitas kolagenase dari bacillus licheniformis F-11.1 dan F-11.4.
Abstrak: Bacillus licheniformis F-11.1 and F-11.4 are strains from B. lichniformis F-11 were isolated from shrimp shell waste in Palembang, Indonesia. They has poliglutamat acid mutation in the operon (PGA) and chitinase AB, so it doesn’t have chitinase activity, but high protease activity. Collagenase plays an important role in the softening of meat and the wound healing process. Precipitation enzyme can use ammonium sulfate to stabilize the enzyme, therebly reducing protein denaturation. Zimogram is an electrophoresis technique to determine the activity of an enzyme in situ and qualitative results of the gel electrophoresis. This research was conduct to analyze the activity Bacillus licheniformis F-11.1 and F-11.4 collagenase qualitatively using techniques zimogram. Analysis is performed on both isolates that grown in three growth media, ie LB + 5% collagen (LBC), ½ LB + 5% collagen (LBHC), and 5% collagen (CLG). Bacillus licheniformis F-11.1 and F-11.4 produce collagenase in the three growth media were added collagen as the substrate growth. Cell growth both isolates best on LBC media. Zimogram showed B. licheniformis F-11.1 and F-11.4 produce collagenase. It shown by the formation of clear zone on the gel due to degradation of collagen by collagenase. Isolates B. licheniformis F-11.1 produce the highest fraction of enzyme crude extract derived from LBC media is 32 fraction. Meanwhile isolates B. lichniformis F-11.4 produce the highest fraction of crude extract derived from LBHC media is 37 fraction
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Judul: Pola Pernikahan Masyarakat Batak Karo di Perantauan
Abstrak: Pernikahan adalah budaya yang tidak akan pernah berhenti, pernikahan akan terjadi secara berkelanjutan Dasarnya, karena pernikahan merupakan kebutuhan biologis manusia. Indonesia adalah negara yang kaya akan budaya dan etnis. Setiap suku di Indonesia mempunyai tata cara/adat istiadat dalam pelaksanaan pernikahan itu sendiri. Begitupun dengan suku Batak karo yang mempunyai sendiri tata cara pelaksanaan pernikahan. Seiring dengan perkembangan zaman Karo Banyak masyarakat yang merantau ke berbagai daerah di Indonesia, salah satunya Bogor berjalan-jalan. Masyarakat Karo yang merantau ke wilayah Bogor pada umumnya akan berusaha melakukan adaptasi ke negara tempat tinggal baru. Keadaan ini juga terjadi pada perkawinan Karo dalam pola adaptasi di Bogor. Namun adaptasi pernikahan masyarakat Karo di Bogor berupaya menjaga nilai-nilai budaya Karo dan sakralisme perkawinan. Mereka do Karo Dimodifikasi pada pola perkawinan, dengan tetap menjaga nilai budaya pernikahan.
Keyword: Weddings Karo, Adaptation marriage patterns, Attitudes