Judul: Pengeringan benih tomat (Licopersicon esculentum Mill) dengan teknologi oven gelombang mikro (Microwive)
Abstrak: Kebutuhan akan buah tomat semakin hari semakin meningkat, peningkatan ini harus diimbangi dengan produksi dan kualitas buah tomat yang lebih baik. Peningkatan produksi dan kualitas dapat dicapai dengan penggunaan varietas unggul dan bermutu. Untuk memperoleh benih yang unggul harus menggunakan teknologi benih dalam pengolahan benih. Teknologi benih mencakup kegiatan seperti: pengembangan varietas, penilaian varietas, produksi benih, pengolahan (pengeringan), penyimpanan, pengujian serta sertifikasi benih (Feistrizer, 1975, dalam Karim, 1976). Alasan mengapa benih itu harus dikeringkan adalah apabila benih disimpan dengan kadar air yang tinggi akan memendekkan umur simpan benih, mudah terserang penyakit pada waktu penyimpanan, dan mengaktifkan beberapa hama (Sahat, 1994). Penelitian ini bertujuan untuk mengetahui karakteristik pengeringan benih tomat dengan menggunakan Microwave, mutu benih tomat yang telah dikeringkan dengan menggunakan Microwave, dan mengetahi efisiensi serta usaha penghematan energi. Pengeringan dengan menggunakan Microwave memiliki prinsip kerja yang berbeda jika dibandingkan dengan oven yang digunakan sebagai standar pembanding. Prinsip kerja pengeringan dengan Microwave adalah suatu insulator dielektrik akan menyerap energi ketika ditempatkan dalam medan listrik berfrekuensi tinggi, untuk menciptakan tegangan tinggi Microwave dilengkapi dengan hv-transformer, diode dan kapasitor. Gelombang elektromagnetik memiliki frekuensi 2450 Ghz, dengan panjang gelombang 12,24 cm. Electron-elektron dari magnetron dihembus dengan blower memasuki saluran wave guide dan diarahkan kedalam oven. ...
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Judul: Kajian penggunaan pancaran elektron pada penyimpanan buah tomat segar
Abstrak: Tanaman tomat (Licopersicum esculentum Mill.) termasuk tanaman hortikultura yang banyak diusahakan oleh petani di pedesaan dan umumnya diperdagangkan dalam bentuk segar. Kelemahan utama buah tomat setelah dipanen adalah keadaan teksturnya yang mudah rusak oleh pengaruh mekanis. Kadar airnya yang relatif tinggi ( 93 persen) juga menyebabkan tomat cepat mengalami kerusakan pada suhu kamar akibat adanya aktivitas enzim dan mikroorganisme. Salah satu alternatif yang kemungkinan besar dapat memperpanjang umur simpan buah tomat segar adalah dengan teknik pancaran elektron. Teknik ini sudah umum digunakan dalam penyamanan ruangan, terutama ruangan yang menggunakan air conditioner. Biaya investasi, perawatan dan operasi untuk alat ini relatif murah. Tujuan penelitian ini adalah untuk mengetahui jumlah pancaran elektron yang sesuai ditinjau dari perubahan kondisi buah tomat dan mempelajari pengaruh pancaran elektron pada buah tomat selama penyimpanan. Manfaat hasil peneli tian ini adalah sebagai sumbangan informatif mengenai manfaat teknik pancaran elektron pada buah tomat yang meliputi umur simpan, kadar air, kadar pektin, kadar vitamin C , kandungan gula total , pH, susut bobot, kekerasan dan organoleptik selama penyimpanan. Manfaat lain adalah sebagai acuan bagi penelitian serupa pada produk hortikultura lainnya. ...
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Judul: Influence of parent-child attachment and teacher-student attachment to build self esteem in progressive and conventional school advisor
Abstrak: Self esteem is one’s ability to evaluate him/herself with the award for him/herself and indicates the extent to which a person believes that he/she is capable, meaningful, successful, and worthwhile. High self esteem is characterized by self-confidence and liveliness of children in socializing with the environment. A factor that affects the process of building self esteem is the relationship between parents and children. The relationship is described by mother's sensitivity to respond to signals that the child gives. The immediate or delay respond and, right or wrong respond will affect the relationship in the long term, it is referred to as attachment. The attachment between teacher and student was also expected to influence child’s self esteem. In general, this study was aimed to analyze the influence of the parentchild attachment and teacher-student attachment in building school-age students’ self esteem. This was cross-sectional study, consisting of 5 elementary schools selected purposively recommended by Head of Department of Education in Depok City. The criteria of selected school were homogeneous and characterized as progressive and conventional schools. Thirty students’ families were selected randomly from the fourth and the fifth grade. Total sample were 150 families. Data was collected using questionnaires which is filled by student. The questionnaires are were Parental Bonding Instrument (PBI) to measure parentchild attachment, The Student – Instructor Relationship (SIRS) to measure teacher-student attachment and Self-Esteem Inventory (SEI) to measure child selfesteem. Data was edited, coded, entried into the computer, cleaning the data, and then analyzed. Data was analyzed using descriptive and inferential statistical analysis. Inferential statistical analysis used Spearman and Pearson correlation test, Chi Square, t-test, and linear regression. The result showed that most of the students had high self esteem both in conventional and progressive school’s students. In term of parent-child attachment, showed that care attachment was higher than overprotection attachment on both types of schools, but maternal overprotection attachment from conventional schools was higher than progressive schools. The result also showed that connectedness of teacher-student attachment was higher than anxiety. Spearman correlation test revealed that there were correlation between maternal care attachment and high self-esteem, also between maternal overprotection attachment and low self esteem on both type of schools. There were correlations between connectedness teacher-student attachment and high students’ self esteem, also between anxiety teacher-student attachment and low students’ self esteem on both types of schools. Overall, students’ self esteem was influenced by the attachment between teacher and student. The more anxiety between student and teacher it is likely, the lower student’s self esteem. Maternal care attachment influenced to higher self esteem of child, meanwhile the more overprotection the maternal attachment, the lower self esteem of child. Type of schools had no influence in building child’s self esteem.
Keyword: parent-child attachment, teacher-student attachment, self esteem, progressive school, and conventional school