Articles

Found 6 Documents
Search

Analisis Keterampilan Psikomotorik Mahasiswa Pada Praktikum Biokimia dan Korelasinya dengan Hasil Belajar Kognitif Puspitasari, Etika Dyah; Febrianti, Novi
Jurnal Pendidikan Biologi Vol 8, No 1 (2018): Jurnal Pendidikan Biologi
Publisher : Magister Pendidikan Biologi, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpb.v8i1.11664

Abstract

Biochemistry practice is a basic practicum that must be mastered by biology education students. Skills in biochemistry practicums are the basis used in practicum physiology, genetics, microbiology, and other materials in biology. This study aims to analyze psychomotor skills achieved by students in biochemical practicums and examine the relationship between cognitive learning outcomes and psychomotor learning outcomes of biology education students in biochemical practicums, especially in the experimental material for making solutions and measuring pH. This research is a quantitative descriptive study with a sample of 40 biology education students. Learning outcomes data were analyzed using quantitative and qualitative analysis, and the correlation between psychomotor and cognitive learning outcomes was analyzed using Pearson Correlation analysis at α = 0.01. The results showed that psychomotor skills that were mastered by students in biochemistry practicum (making solutions and pH measurements) included levels 1-4, with an achievement percentage of 89.19% at level perception; 97.30% at the level set; 51.62% at the guided response level and 72.97% at the mechanism level, with psychomotor learning outcomes averaging 58 (sufficient category). The cognitive value of students in the experimental for making solutions and pH measurements was 63.32 (good category). There is a positive correlation between psychomotor and cognitive learning outcomes of students in biochemistry practicum (r = 0.67) with a strong correlation category.
BIOSINTESIS SELULOSA OLEH ACETOBACTER XYLINUM MENGGUNAKAN LIMBAH CAIR TAHU SEBAGAI MEDIA PERTUMBUHAN DENGAN PENAMBAHAN MOLASE Febrianti, Novi
Prosiding Seminar Biologi Vol 8, No 1 (2011): Seminar Nasional VIII Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRACT   Cellulose is a biopolymer whose numbers most  abundant in nature and have an important role as various kinds of industrial raw materials. In this study,  liquid waste of soy used as a growth medium  for A. xylinum bacteria to synthesize cellulose with  addition of molasses as carbon source. The aim of this research was to know the effect of different concentrations of molasses on cellulose layer weight and which is the best concentration of molasses that produce the highest weight of cellulose. Three  concentration of molasses were tested, namely 2%, 4% and 6%. Observation on layer cellulose weight produced was performed on day-10 . The study shows that the more concentrations of molasses is given, the more weight of the layer of cellulose, although this weight difference was not significant. 6% molasses concentration produces the most high cellulose weight.   keywords: cellulose , molase, liquid waste of soy, A. xylinum
AKTIVITAS INSEKTISIDAL EKSTRAK ETANOL DAUN KIRINYUH (EUPATORIUM ODORATUM L.) TERHADAP WERENG COKLAT (NILAPARVATA LUGENS STAL.) Febrianti, Novi; Rahayu, Dwi
Prosiding Seminar Biologi Vol 9, No 1 (2012): Seminar Nasional IX Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAK   Kirinyuh (Eupatorium odoratum) mengandung senyawa alkaloid, flavonoid, tannin, dan seskuiterpen yang bersifat insektisidal. Penelitian ini bertujuan untuk mengetahui aktivitas insektisidal ekstrak etanol daun kirinyuh terhadap wereng coklat dan nilai LC50-24 jam. Penelitian menggunakan rancangan acak lengkap (RAL) dengan menvariasikan  konsentrasi ekstrak etanol daun kirinyuh, yaitu 0%, 3%, 6%, 9% dan 12%. Data hasil penelitian dianalisis dengan analisis  regresi, probit, dan  Anava yang dilanjutkan BNT 5%. Dari hasil penelitian ini diketahui bahwa ekstrak etanol daun kirinyuh mempunyai aktivitas insektisidal terhadap wereng coklat, semakin tinggi konsentrasi ekstrak etanol daun kirinyuh  maka semakin tinggi pula tingkat kematian wereng coklat. Nilai LC50-24 jam adalah sebesar 14,905%. Berbagai konsentrasi ekstrak etanol yang diberikan memberikan pengaruh yang berbeda terhadap tingkat kematian wereng coklat.   Kata kunci:  aktivitas insektisidal, kirinyuh (Eupatorium odoralum L.), wereng coklat
KANDUNGAN ANTIOKSIDAN ASAM ASKORBAT PADA BUAH-BUAHAN TROPIS Febrianti, Novi
BIOWALLACEA Vol 2, No 1 (2016): BioWallacea Vol 2 No 1
Publisher : Program Studi Biologi FMIPA Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Tropical fruits are rich in nutrients and phytochemicals that benefit our health. As source ofantioxidant, regular consumption of fruits will be useful in avoiding many degenerative diseasesparticularly caused by free radicals. The good effects of antioxidants vary from repairing tissuedamages in respiratory system, excretory system as well as reproductive system. Ascorbic acid is onepotent antioxidant that has been recorded for history. Known as Vitamin C, its concentration in fruitshas been a primary consideration for people to choose what kind of fruit they are going to consume.This experiment’s result exhibited different levels of ascorbic acid in some tropical fruits. Averageconcentration of ascorbic acid from the highest to lowest was obtained in avocado,orange, strawberry,guava, apple, papaya, tamarind and mango with their contents of 119,8; 96,8; 66,65; 49,86; 49,57; 48,4and 41,06 mg/100g, respectively. This result would be a baseline in setting the best fruit combinationto obtain maximum effects of antioxidant.Keywords: tropical fruits, antioxidants, ascorbic acid
STRUCTURE ELUCIDATION OF ALKALOIDS FROM LEAVES OF Voacanga foetida (Bl.) Rolfe OF LOMBOK ISLAND Hadi, Surya; Asnawati, Dina; Febrianti, Novi
Indonesian Journal of Chemistry Vol 10, No 2 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.473 KB) | DOI: 10.22146/ijc.21460

Abstract

The leaves of Voacanga foetida (Bl.) Rolfe, have been used ethnomedically for the treatment of wounds, itches, and swellings particularly in Lombok island. A phytochemical study has been done to investigate chemical compounds responsible against the cause of the diseases. By separating alkaloidal fraction from the leaves was found voacristine 1 as the major alkaloidal compound, and voacangine 2 and coronaridine 3 as the minor components. The structure elucidation of the compounds was carried out on the basis of spectroscopy data. A structure revision of voacristine 1 was also reported.   Keywords: alkaloids, Voacanga foetida, Lombok
Developing psychomotor evaluation instrument of biochemistry practicum for university students of biology education Puspitasari, Etika Dyah; Susilo, Mohamad Joko; Febrianti, Novi
REiD (Research and Evaluation in Education) Vol 5, No 1 (2019): June
Publisher : Program Pascasarjana Universitas Negeri Yogyakarta (Yogyakarta State University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.006 KB) | DOI: 10.21831/reid.v5i1.22126

Abstract

Praktikum merupakan salah satu aspek yang penting dalam pembelajaran biologi. Penelitian ini bertujuan untuk mengembangkan instrumen penilaian psikomotorik praktikum biokimia untuk mahasiswa pendidikan biologi. Penelitian ini merupakan jenis penelitian dan pengembangan yang menggunakan model 4D (define, design, develop, disseminate), namun pada penelitian ini hanya dilakukan sampai tahap develop. Instrumen penilaian psikomotorik yang dikembangkan terdiri dari 80 butir pernyataan yang mencakup 4 level psikomotorik yaitu perception, set, guided response dan mechanism. Pengujian validitas isi dilakukan oleh ahli serta dilakukan analisis faktor eksploratori (EFA) menggunakan SPSS 20. Uji kelayakan produk dilakukan oleh ahli materi dan ahli evaluasi serta dilakukan uji keterbacaan oleh asisten praktikum biokimia. Uji coba produk dilakukan pada kelompok kecil yaitu satu golongan praktikum dan uji coba kelompok besar dilakukan pada tiga golongan praktikum. Hasil keterbacaan asisten praktikum terhadap instrumen yang dikembangkan sebesar 93,85% masuk katagori sangat baik. Hasil penilaian kelayakan produk dari segi kebahasaan, konstruksi, materi, obyektivitas dan kebermanfaatan oleh ahli materi sebesar 91,67 % masuk kategori sangat baik dan penilaian produk dari ahli evaluasi sebesar 81,67% masuk katagori sangat baik. Hasil analisis EFA menunjukkan nilai KMO 0,857 (>0,5). Hasil uji penilaian psikomotorik mahasiswa mendapatkan nilai rata-rata 62, masuk kategori baik.