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Syarif Hidayat
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 1 
BAGAN PENGERINGAN DEHUMIDIFIKASI BEBERAPA JENIS KAYU INDONESIA Syarif Hidayat
Jurnal Penelitian Hasil Hutan Vol 9, No 1 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1991.9.1.28 - 33

Abstract

Since it• commercial introduction in the late 1960 deh~midification haa become a  very popular method of dryift6. npeciany  for the •mailer operation drying hardwoods. Dehumidification haa also beenpractiaed in tome lndonaian  mw- milla. However, the  Information concerning the  drying achedule of lndoneaian woods were .till  limited. Thia report'Yi dacribe   the dehumidification drying  achedule for tome lndonaian   commercial woods, •which  were taken from Riau, Lampu"I  and Central Kalimantun. The method uaed in determining the d,.Ying achedule waa adapted from the method ulied by Teruawa  (1966) and Kadir (1976). The experiment were conducted in two ataga. The !ht   atage wa1 preliminary dryinf  to praume  the dryfnl propatie1, and the •cond  atage waa the dryinl  in dehumidifier to identify the real drying 1cheduk.  The  result of  the experiment indicated that the •21  wood apecie• can be classified into three drying achedule, achedule I for wood which it euat    to dry,achedule II moderate and schedule Ill  for the wood with the moat difficult to dry.
PENGERINGAN ALAMI DAN BUATAN SEPULUH JENIS KAYU NUSA TENGGARA BARAT (Air drying and kiln drying properties of 10 wood species from Nusa Tenggara Barat) Efrida Basri; Syarif Hidayat
Jurnal Penelitian Hasil Hutan Vol 11, No 3 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1993.11.3.122-127

Abstract

This report presents result of a study on air drying properties and kiln drying schedule of ten  wood species from  Nusa   Tenggara Barat. the study  was   carried out   based On data from  quick drying test. The result shows that, the quality of almost all of the species dried using  air drying method are  inferior compared with that obtained from kiln drying. the ten wood species used   in the study can be grouped into four  drying schedules,  ringin, kabaukafa, sabaha and niu can be grouped into schedules  1 (easy to dry), katowi and kencari schedule 2, whereas red monggo and konca schedule 3, and mongo schedule  4 (difficult to dry).
PENGARUH ASAL DAN UMUR POHON TERHADAP SIFAT PENGERINGAN KAYU SENGON (The effect Age and Location on the drying properties of sengon wood) Efrida Basri; Syarif Hidayat
Jurnal Penelitian Hasil Hutan Vol 11, No 4 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4881.323 KB) | DOI: 10.20886/jphh.1993.11.4.129-133

Abstract

This paper discusses the drying properties of sengon (Paraserianthes falcataria) from plantation forest and natural forest. The material used in the study were selected from 5, 15 and 25 year old plantation forest in Jawa Timur, and from natural forest in Maluku. The drying method used in the study were air and solar drying. Wood from plantation forest contain a large portion of juvenile wood which shrink more than the wood from mature wood. As a consequence the wood from plantation forest are more prone to warping.This study reveals that tree age has a significant effect on the drying properties, and wood from natural forest needs more time to dry.Solar drying method are faster up to 40 % of the air drying method.
SIFAT PENGERINGAN ALAMI DAN DEHUMIDIFIKASI BEBERAPA JENIS KAYU INDONESIA Syarif Hidayat; Suparman Karnasudirdja
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3110.858 KB) | DOI: 10.20886/jphh.1987.4.3.41-44

Abstract

This paper presents results of laboratory study  on the rate of moisture  content  decrease of 19 timber species.  The test specimen from each species were subjected  to air drying under sheltered condition  (under roof) and drying in a dehumidifying chamber.  At the end of each test.  the defect of each specimen  was recorded, and the most appropriate form of relation between duration  of drying and moisture  content  decrease was sought.From data analysis it was shown that a power form of relationship (Y = aXb) was reasonable, with coefficient  of correlation values varying between  0.80-0.90.The result also shows  that the longest air drying time (from 60% to 20%  moisture  content)  was recorded by kayu besi (53 days) and the shortest  by dama-dama  and palapi  (18 days).As  has been anticipated,  drying  in the dehumidifier   has reduced  considerably  the time  required for  drying from 60% to 20% moisture content. For example for the three species mentioned  above  the figures  were 20 days for  kayu  besi and 5 days for  dama-dama  and palapi.The result shows further  that severe defect was observed in kolaka,  bugis, suling and belu itam.  The remaining species have either moderate or slight defect.
BAGAN PENGERINGAN DEHUMIDIFIKASI BEBERAPA JENIS KAYU INDONESIA Syarif Hidayat
Jurnal Penelitian Hasil Hutan Vol 9, No 1 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1991.9.1.28 - 33

Abstract

Since it• commercial introduction in the late 1960 deh~midification haa become a  very popular method of dryift6. npeciany  for the •mailer operation drying hardwoods. Dehumidification haa also beenpractiaed in tome lndonaian  mw- milla. However, the  Information concerning the  drying achedule of lndoneaian woods were .till  limited. Thia report'Yi dacribe   the dehumidification drying  achedule for tome lndonaian   commercial woods, •which  were taken from Riau, Lampu"I  and Central Kalimantun. The method uaed in determining the d,.Ying achedule waa adapted from the method ulied by Teruawa  (1966) and Kadir (1976). The experiment were conducted in two ataga. The !ht   atage wa1 preliminary dryinf  to praume  the dryfnl propatie1, and the •cond  atage waa the dryinl  in dehumidifier to identify the real drying 1cheduk.  The  result of  the experiment indicated that the •21  wood apecie• can be classified into three drying achedule, achedule I for wood which it euat    to dry,achedule II moderate and schedule Ill  for the wood with the moat difficult to dry.
PENGERINGAN ALAMI DAN BUATAN SEPULUH JENIS KAYU NUSA TENGGARA BARAT (Air drying and kiln drying properties of 10 wood species from Nusa Tenggara Barat) Efrida Basri; Syarif Hidayat
Jurnal Penelitian Hasil Hutan Vol 11, No 3 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1993.11.3.122-127

Abstract

This report presents result of a study on air drying properties and kiln drying schedule of ten  wood species from  Nusa   Tenggara Barat. the study  was   carried out   based On data from  quick drying test. The result shows that, the quality of almost all of the species dried using  air drying method are  inferior compared with that obtained from kiln drying. the ten wood species used   in the study can be grouped into four  drying schedules,  ringin, kabaukafa, sabaha and niu can be grouped into schedules  1 (easy to dry), katowi and kencari schedule 2, whereas red monggo and konca schedule 3, and mongo schedule  4 (difficult to dry).
PENGARUH ASAL DAN UMUR POHON TERHADAP SIFAT PENGERINGAN KAYU SENGON (The effect Age and Location on the drying properties of sengon wood) Efrida Basri; Syarif Hidayat
Jurnal Penelitian Hasil Hutan Vol 11, No 4 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1993.11.4.129-133

Abstract

This paper discusses the drying properties of sengon (Paraserianthes falcataria) from plantation forest and natural forest. The material used in the study were selected from 5, 15 and 25 year old plantation forest in Jawa Timur, and from natural forest in Maluku. The drying method used in the study were air and solar drying. Wood from plantation forest contain a large portion of juvenile wood which shrink more than the wood from mature wood. As a consequence the wood from plantation forest are more prone to warping.This study reveals that tree age has a significant effect on the drying properties, and wood from natural forest needs more time to dry.Solar drying method are faster up to 40 % of the air drying method.
SIFAT PENGERINGAN ALAMI DAN DEHUMIDIFIKASI BEBERAPA JENIS KAYU INDONESIA Syarif Hidayat; Suparman Karnasudirdja
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1987.4.3.41-44

Abstract

This paper presents results of laboratory study  on the rate of moisture  content  decrease of 19 timber species.  The test specimen from each species were subjected  to air drying under sheltered condition  (under roof) and drying in a dehumidifying chamber.  At the end of each test.  the defect of each specimen  was recorded, and the most appropriate form of relation between duration  of drying and moisture  content  decrease was sought.From data analysis it was shown that a power form of relationship (Y = aXb) was reasonable, with coefficient  of correlation values varying between  0.80-0.90.The result also shows  that the longest air drying time (from 60% to 20%  moisture  content)  was recorded by kayu besi (53 days) and the shortest  by dama-dama  and palapi  (18 days).As  has been anticipated,  drying  in the dehumidifier   has reduced  considerably  the time  required for  drying from 60% to 20% moisture content. For example for the three species mentioned  above  the figures  were 20 days for  kayu  besi and 5 days for  dama-dama  and palapi.The result shows further  that severe defect was observed in kolaka,  bugis, suling and belu itam.  The remaining species have either moderate or slight defect.
Co-Authors Efrida Basri Suparman Karnasudirdja