Ni Kadek Yunita Sari
Program Studi Magister Ilmu Biologi, Program Pascasarjana Universitas Udayana, Kampus Sudirman

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PENGARUH MUTAGEN KIMIA SODIUM AZIDA TERHADAP MORFOLOGI TANAMAN CABAI BESAR (CAPSICUM ANNUUM L.) Yunita Sari, Ni Kadek; Pharmawati, Made; Junitha, I Ketut
Metamorfosa: Journal of Biological Sciences Vol 1 No 1 (2012)
Publisher : Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana

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Abstract

The aim of this research was to examine the effects of sodium azide at concentration of 1 mM, 2 mM, 3 mM, 4 mM and 5 mM on the morphological characters of Capsicum annuum L. The method used for the observation of morphological characters was direct observation by measuring plant height, leaf length and width as well as counting the number of leaves. The results showed that effect of sodium azide at 3 mM caused an increase in plant height, while concentration of 1 mM, 2 mM, 4 mM dan 5 mM caused a decrease in plant height. Similar trends were found for number of leaf. Leaf length and width tended to increase in sodium azide treatments.
Uji Aktivitas Antioksidan Ekstrak Daun Akasia (Acacia Auriculiformis) Yunita Sari, Ni Kadek; Adhi Putra, I Made Wisnu
Jurnal Media Sains Vol 2, No 1 (2018): JURNAL MEDIA SAINS
Publisher : LPPM Universitas Dhyana Pura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.946 KB) | DOI: 10.36002/jms 3.v2i1.352

Abstract

ABSTRAKRadikal bebas merupakan suatu senyawa asing yang masuk ke dalam tubuh dan merusak sistem imunitas tubuh. Jika jumlahnya berlebih, radikal bebas akan memicu efek patologis seperti arterosklerosis, kanker, diabetes dan penyakit degeneratif lainnya. Untuk meredam aktivitas radikal bebas diperlukan antioksidan. Antioksidan merupakan senyawa yang mampu menetralisir atau menstabilkan radikal bebas dengan cara melengkapi kekurangan elektron pada radikal bebas tersebut. Tanaman yang termasuk ke dalam suku fabaceae merupakan tumbuhan yang sebagian besar spesiesnya mengandung senyawa antioksidan. Aktivitas antioksidan pada tanaman Acacia auriculiformis selama ini belum pernah dilaporkan. Penelitian terhadap tanaman Acacia auriculiformis perlu dilakukan, mengingat pemanfaatannya masih sebatas memenuhi kebutuhan serat terutama untuk bahan baku industri pulp dan kertas serta sebagai tanaman pelindung. Tujuan penelitian ini untuk mengetahui aktivitas antioksidan dan untuk mengetahui nilai IC50 (inhibitory concentration) dan nilai AAI (Antioxidant Activity Index) dari ekstrak daun muda dan tua Acacia auriculiformis. Sampel kering daun diekstraksi secara maserasi menggunakan pelarut etanol. Ekstrak tersebut selanjutnya diuji aktivitas antiradikal bebas berdasarkan kemampuan pengikatan radikal bebas DPPH (2,2-difenil-1-pikrilhidrazil). Hasil penelitian menunjukkan ekstrak daun muda dan tua Acacia auriculiformis memiliki aktivitas sebagai antioksidan, nilai IC50 dan AAI ekstrak daun muda dan daun tua Acacia auriculiformis berturut-turut adalah 464,2361 ppm (AAI=0,0861), 433,6332 ppm (AAI=0,0922) sedangkan vitamin C sebagai pembanding memiliki nilai IC50 159,6216 ppm (AAI=0,2505).Kata kunci: Antioksidan, radikal bebas, akasia, IC50, AAIABSTRACTFree radicals are foreign compounds that enter the body and damage the body's immune system. If the amount is excessive, free radicals will trigger the effects of pathologists such as arterosklerosis, cancer, diabetes and other degenerative diseases. To reduce free radical activity required antioxidants. Antioxidants are compounds capable of neutralizing or stabilizing free radicals by supplementing electron deficiencies in these free radicals. The plant of fabaceae is a plant that most of the species contain antioxidant compounds. The antioxidant activity of Acacia auriculiformis plants has not been reported. Research on Acacia auriculiformis plant needs to be done, considering the utilization is still limited to meet the needs of fiber, especially for the raw materials of the pulp and paper industry and as a protective plant. The purpose of this research is to know the antioxidant activity and to know the value of IC50 (inhibitory concentration) and the value of AAI (Antioxidant Activity Index) from young and old leaf extract of Acacia auriculiformis. Dry samples of leaves are extracted by maceration using ethanol solvent. The extract was then tested for free antiradical activity based on DPPH free radical binding ability (2,2-diphenyl-1-picrylhydrazyl). The results showed that Acacia auriculiformis leaf extract had activity as antioxidant, IC50 and AAI value of young leaf extract and old leaves of Acacia auriculiformis were 464,2361 ppm (AAI = 0,0861), 433,6332 ppm (AAI = 0,0922) while vitamin C as comparison have value of IC50 159,6216 ppm (AAI = 0,2505).Keywords: Antioxidant, free radicals, Acacia, IC50, AAI
Struktur Morfologi Bunga Dan Anatomi Serbuk Sari Buah Naga Super Merah (Hylocereus costaricensis) Yunita Sari, Ni Kadek
Jurnal Media Sains Vol 1, No 2 (2017): JURNAL MEDIA SAINS
Publisher : LPPM Universitas Dhyana Pura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.743 KB) | DOI: 10.36002/jms 3.v1i2.264

Abstract

ABSTRAK?Penelitian ini dilakukan untuk mengetahui struktur morfologi bunga dan anatomi serbuk sari buah naga super merah (Hylocereus costaricensis). Hasil pengamatan menunjukkan strukturmorfologi bunga buah naga super merah dari luar ke dalam terdiri dari kelopak, mahkota bunga,putik dengan kepala putik lebih tinggi dari kepala sari, dan bakal buah. Anatomi serbuk saribunga buah naga daging super merah memiliki kelas ukuran berdasarkan indeks P/E bentuksubspheroidal, apertura tritreme dengan tipe sulkus, dan termasuk kelompok magna.Kata kunci: morfologi,anatomi, serbuk sari,buah naga, sulkus ABSTRACT?The purpose of this study is to know the morphological structure of the flowers andanatomy of the pollen of super red dragon fruit (Hylocereus costaricensis). The results showedthe morphological structure of super red dragon fruit flowers from outside to inside consists ofsepala, petala, pistil with stigma more higher than anthera, and ovary. Anatomical pollen ofsuper red dragon f ruits have a size class based on P / E index of the subspheroidal shape, apertura tritreme with sulcus type, and included magna group. Keywords: morphology, anatomy, pollen, dragon fruit, sulcus