Judul: Determinasi emisi formaldehida papan komposit dari limbah kayu dan anyaman bambu betung [Dendrocalamus asper (Schult.f.) Backer ex Heyne]
Abstrak: INTRODUCTION. There are many research have been done on composite board and it's characteristic. Composite board was a promising forest product that can substitute products which needs a lot of wood materials. Formaldehyde resin which used in composite board caused formaldehyde emission problem to the environment. The focus of this research is to determine formaldehyde emission from composite board which was made of wood industrial waste and betung bamboo plaited mats. Some of importing countries have made regulation about formaldehyde emission level for forest product, so that for Indonesia as an exporter forest product should fulfill this requirement. Therefore, in this research isocyanate was used to reduce formaldehyde emission from Melamin Formaldehida (MF). The objectives of this research are to find the best glue composition for low formaldehyde emission, and to know relation between moisture content and formaldehyde emission value. MATERIALS AND METHODS. Wood industrial waste materials used in this research are acacia, sengon, and Shorea spp. For gluing the composite board was bended using MF and isocyanate. Treatment in this research include composition of isocyanate -MF (1:0, 1:1, 1:2, 1:3, 1:4, 0:1) and paraffin level (0%, 2%, 4%. 6%, 8%). The research methods are board making which includes glue mixing isocyanate-MF, mat forming, hot pressing, and conditioning ± 2 weeks. The composite board was analyzed for formaldehyde emission test used the WKI bottle method. Statistical analyze using program SPSS 13. Two standards are use to classify the emission value, there are SNI 01-6050-1999 and JAS 2003. RESULT AND DISCUSSION. From the formaldehyde emission test, it found that the glue composition which fulfill the F**** (JAS 2003) and E0 (SNI 01- 6050-1999) are isocyanate-MF 0:1 with paraffin level 0% until 8% and glue composition of isocyanate-MF 1:1 with paraffin level 2%. The glue composition which fulfill the F*S and E2 are isocyanate-MF 1:1 with paraffin level 0%, 4%, 6%, isocyanate-MF 1:2 with paraffin level 6%, and isocyanate-MF 1:4 with paraffin level 8%. The glue composition which fulfill the F** and El is isocyanate-MF 1:1 with paraffin level 8%. And the glue composition that fulfill the F** and E2 is isocyanate-MF with paraffin level 4%. Other glue composition and paraffin levels did not fulfill the emission value of JAS 2003 and SNI 01- 6050-1999 standard. This research found that emission values are influenced by type of resin, resin composition, and the amounts of resin that used. The formaldehyde emission value might be influenced by resin molar ratio, and wood species...
Keyword: Composite board, Emissions formladehida, Melamine formladehida, Isocyanate, WKI bottle method

Judul: Kualitas Papan Partikel Beremisi Formaldehida Rendah dari Limbah Inti Kenaf (Hibiscus cannabinus L.)
Abstrak: The objective of this research is to find out the optimum pMDI-UF mixing level and paraffin content. The optimum conditions were determined based on the physical and mechanical properties and formaldehyde emission of the produced particleboard. pMDI-UF mixing levels were 1 : 1; 1 : 2; 1 : 3; 1 : 4, and 0 : 1. The resin content level was 10% based on the kenaf core particle oven dry. Meanwhile, the paraffin contents were 0%, 2%, 4%, 6%, and 8%. The research results are as follows : 1) The best performance was resulted by core kenaf particleboard bonded by pMDI-UF 1 : 4 and 8% paraffin level, pMDI-UF 1 : 1 and 4% paraffin level, and pMDI-UF 1 : 4 and 4% paraffin level, respectively. The boards properties fulfill the JIS A 5908:2003 standard, except the modulus of elasticity (MOE) properties. pMDI – UF mixing level 1 : 1 and 4% paraffin level with those of 1 : 4 and 4% paraffin level release the lowest formaldehyde emission (0,4 mg/l) and fulfill the criteria F*** set up by JIS A 5908:2003. The produced core kenaf particleboard performed better quality compared to those of commercial particleboard and fiberboard.
Keyword: Particleboard, Core kenaf waste, Low emission formaldehyde, Perekat, Parafin

Judul: Kista Luteal Proses Terjadinya dan Penanggulangannya Pada Sapi Perah
Abstrak: Salah satu kista pada ovari adalah kista luteal, merupakan gangguan reproduksi yang diawali oleh gagalnya sel telur untuk terovulasi, sebagai akibat ketidak seimbangan hormonal dalam tubuh. Hal ini disebabkan oleh kegagalan hipofisa dalam melepaskan hormon lutein (LH) dalam jumlah yang cukup untuk terjadinya ovulasi dan pembentukan korpus luteum. Ovum yang tidak terovulasi ini akan menetap dalam follikel, selanjutnya follikel menetap pada ovarium dan menjadi kista. Kista follikel yang tidak mendapat pengobatan selama 29 hari atau lebih akan membentuk sel - sel lutein yang akan menghasilkan hormon progesteron sehingga gejala klinis yang terlihat ialah hilangnya gejala birahi yang biasanya muncul secara periodik. ...
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