scholarly journals Biomassa dan Cadangan Karbon Tiga Jenis (Cyclosorus interruptus, Nephrolepis biserrata, dan Digitaria didactyla) Tumbuhan Herba Pada Periode Penyiangan Berbeda

2021 ◽  
Vol 5 (2) ◽  
pp. 65
Author(s):  
Eni Susanti ◽  
Karyati Karyati ◽  
Muhammad Syafrudin
Keyword(s):  
Carbon Content ◽  
Study Plot

The weeding duration influencing biomass and carbon content of herbaceaous species. The objective of this study were to analyze biomass and carbon content of three herbaceaous species (Cyclosorus interruptus, Nephrolepis biserrata, and Digitaria didactyla) in terms of different wedding durations. The biomass of Cyclosorus interruptus  that weeded for 2, 3, and 4 weeks were 26.50 gram, 35.50 gram, and 27.00 gram in study plot sized 12 m2. Nephrolepis biserrata had biomass 15.38 gram (weeding period of 2 weeks), 15.28 gram (weeding period of 3 weeks), and 19.90 gram (weeding period of 4 weeks). Biomass content of Digitaria didactyla were 76.67 gram, 74.00 gram, and 190.00 gram for weeding periods 2, 3, and 4 weeks, respectively.  The carbon content of Cyclosorus interruptus with weeding periods of 2, 3, and 4 weeks were 0,062 ton/ha, 0,056 ton/ha, and 0,032 ton/ha, respectively. Nephrolepis biserrata had carbon contents of 0,067 ton/ha, 0,051 ton/ha, and 0,050 ton/ha in weeding periods 2, 3, and 4 weeks. The highest carbon content of Digitaria didactyla were that weeded every 4 weeks (0,223 ton/ha) compared than weeding periods 2 weeks (0,180 ton/ha) and 3 weeks (0,116 ton/ha).

Bleaching ability of pre-hydrolyzed pulps in the context of a biorefinery mill

TAPPI Journal ◽  
2013 ◽  
Vol 12 (11) ◽  
pp. 49-53 ◽  
Author(s):  
CHRISTINE CHIRAT ◽  
LUCIE BOIRON ◽  
DOMINIQUE LACHENAL
Keyword(s):  
Carbon Content ◽  
Acid Hydrolysis ◽  
13C Nmr ◽  
Kraft Lignin ◽  
Kappa Number ◽  
Hydroxyl Groups ◽  
Kraft Pulps ◽  
Quaternary Carbon ◽  
Oxygen Delignification

Autohydrolysis and acid hydrolysis treatments were applied on mixed softwood chips. The cooking ability was studied by varying the alkali and duration of the cook. Pulps with kappa numbers varying from 30 to 70 were obtained. The bleaching ability of these pulps was studied and compared to control kraft pulps. The prehydrolyzed pulps were shown to be more efficiently delignified by oxygen than the control kraft pulps starting from the same kappa number. Furthermore, the final bleaching was also easier for these pulps. It was also shown that extensive oxygen delignification applied on high-kappa pre-hydrolyzed pulps could be a way to improve the overall yield, which is a prerequisite for the development of such biorefinery concepts. Lignin was isolated from the control kraft and the two pre-hydrolyzed kraft pulps and analyzed by 13C NMR. Lignins from pre-hydrolyzed kraft pulps had similar free phenolic groups content to the control kraft lignin, but their aliphatic hydroxyl groups and β-O-4 content were lower than for the control lignin. The quaternary carbon content was the same for all the samples.

AISI 1340

Alloy Digest ◽  
1969 ◽  
Vol 18 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Carbon Content ◽  
Tensile Properties ◽  
Alloy Steel ◽  
Heat Treating ◽  
Steel Mills

Abstract AISI 1340 is a carbon-manganese oil hardening steel with greater hardenability than the 1000 and 1100 steels of comparable carbon content, and with poorer machinability than the sulfurized 1100 steels. It is recommended for general engineering and machinery parts such as shafts, gears, axles, fasteners, rollers, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-30. Producer or source: Carbon and alloy steel mills.

ALGOMA AR225

Alloy Digest ◽  
2003 ◽  
Vol 52 (12) ◽  
Keyword(s):  
Carbon Steel ◽  
Chemical Analysis ◽  
Physical Properties ◽  
Carbon Content ◽  
Brinell Hardness ◽  
Low Cost ◽  
Heat Treating ◽  
Rolled Plate ◽  
High Carbon ◽  
High Carbon Content

Abstract Algoma AR225 is a carbon steel developed primarily to supply a low-cost material for high-abrasion applications. It is furnished in the form of as-rolled plate with a relatively high carbon content (0.35-0.45%). AR-225 is sold on the basis of chemical analysis only; the number 225 signifies the approximate Brinell hardness. On thicknesses one-half inch and over, this Brinell value may be lower than 225 because of higher finishing temperatures. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-138. Producer or source: Algoma Steel Corporation Ltd.

VDM LC-NICKEL 99.2

Alloy Digest ◽  
1996 ◽  
Vol 45 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Carbon Content ◽  
Tensile Properties ◽  
Heat Treating ◽  
Alkaline Media ◽  
Excellent Corrosion Resistance

Abstract VDM LC-Nickel 99.2 is unalloyed nickel which offers excellent corrosion resistance in many alkaline media. The metal also has good mechanical, magnetic, and magnetostrictive properties. It has a reduced carbon content to avoid graphitization at temperatures above 570 deg F (300 deg C). This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-502. Producer or source: VDM Technologies Corporation.

KUBOTA HK40 and HK50

Alloy Digest ◽  
2007 ◽  
Vol 56 (10) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Carbon Content ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Heat Treating ◽  
Industrial Applications ◽  
High Temperature Strength ◽  
Ni Alloys ◽  
Moderately High Temperature

Abstract Kubota alloys HK40 and HK50 are austenitic Fe-Cr-Ni alloys that have been standard heat-resistant materials for more than four decades. With moderately high temperature strength, oxidation resistance, and carburization resistance the alloys are used in a wide variety of industrial applications. HK 50 has slightly higher carbon content. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on casting, heat treating, machining, and joining. Filing Code: SS-998. Producer or source: Kubota Metal Corporation, Fahramet Division.

AISI TYPE L2

Alloy Digest ◽  
1983 ◽  
Vol 32 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Carbon Content ◽  
Tensile Properties ◽  
Tool Steel ◽  
Cold Work ◽  
Heat Treating ◽  
Steel Mills ◽  
Aisi Type ◽  
Lower Carbon

Abstract AISI Type 1.2 is a chromium-vanadium tool steel of modest hardenability and variable carbon content (nominally 0.50-1.10% carbon). At its lower carbon levels, it is used for tools requiring toughness and resistance to shock and vibration. At its higher carbon levels, it is recommended for resistance to abrasion, fatigue and wear. It is used for both hot-work and cold-work applications. Among its many uses are automotive gears, forgings, gun barrels, shafts, wrenches, chisels, punches, lathe spindles, axes, shear blades, dies, files, reamers and drills. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-416. Producer or source: Tool steel mills.

AK STEEL TYPE 304

Alloy Digest ◽  
2020 ◽  
Vol 69 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Carbon Content ◽  
Atmospheric Corrosion ◽  
Carbide Precipitation ◽  
Steel Grade ◽  
Good Resistance ◽  
Steel Type ◽  
Temperature Performance ◽  
Type 304 ◽  
Lower Carbon

Abstract AK Steel Type 304 is a chromium-nickel austenitic stainless steel. It is a variation of the base 18-8 grade, but with higher chromium and lower carbon content. The lower carbon content minimizes carbide precipitation due to welding and reduces its susceptibility to intergranular corrosion. Type 304 is the most versatile and widely used stainless steel grade. It combines good resistance to atmospheric corrosion and to many chemicals, food, and beverages. It has excellent formability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties as well as fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming and joining. Filing Code: SS-1317. Producer or source: AK Steel Corporation. Originally published April 2020, corrected May 2020.

EASTERN STAINLESS TYPE 316L

Alloy Digest ◽  
1984 ◽  
Vol 33 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Carbon Content ◽  
Heat Treating ◽  
Low Carbon ◽  
Steel Company ◽  
Aisi Type ◽  
Type 316L ◽  
Molybdenum Steel

Abstract EASTERN STAINLESS Type 316L is a chromium-nickel-molybdenum steel with a very low carbon content (0.03 max.) Its general resistance to corrosion is similar to AISI Type 316 but, because of its low carbon content, it has superior resistance to the formation of harmful carbides that contribute to intergranular corrosion. Type 316L is used widely in many industries such as chemical, food, paper, textile, nuclear and oil. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-439. Producer or source: Eastern Stainless Steel Company.

Sign in / Sign up

Export Citation Format

Share Document