Modeling based on carbon content classification does not improve the prediction accuracy of carbon in intertidal zone sediments

Author(s):  
Meirong Lv ◽  
Xueying Li ◽  
Pingping Fan ◽  
Jie Liu ◽  
Zhongliang Sun ◽  
...  
Omni-Akuatika ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 1
Author(s):  
Tri Dewi Kusumaningrum Pribadi ◽  
Yudi Nurul Ihsan

Temperature rise due to climate change have an impact on various ecosystems, including coastal ecosystems. Temperature rise also affects plant metabolism, such as carbon uptake. Macroalgae is the dominant community in the intertidal zone, and potential to absorb carbon. A series of experiments on several dominant macroalgae species from the south coast of West Java have been done to see the effect of temperature regime on carbon content. The treatment of temperatures of 24, 27, 30, and 33 °C was carried out for 72 hours against 6 macroalgae species representing Chlorophycae, Phaeophycea and Rhodophyceae to investigate carbon content. The results showed that the macroalgae of Phaeophyceae division showed higher carbon content in comparison to the macroalgae of the other divisions. The temperature that significantly affects chloropyll was 33 oC against all the species being tested.


Alloy Digest ◽  
2020 ◽  
Vol 69 (3) ◽  

Abstract Lucefin Group 42CrMo4 and 42CrMoS4 are medium-carbon, 1% chromium-molybdenum, direct hardening, alloy steels that are also suitable for flame hardening, induction hardening, and nitriding. These steels are medium hardenability steels in the 0.40 to 0.42 mean carbon content classification. In general, they are used for medium and large size parts requiring high strength and toughness. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, machining, and joining. Filing Code: SA-861. Producer or source: Lucefin S.p.A.


Alloy Digest ◽  
2021 ◽  
Vol 70 (4) ◽  

Abstract CEN 46Cr2 and 46CrS2 are medium-carbon, 0.5% chromium direct hardening alloy steels that are also suitable for flame or induction hardening. These steels are low hardenability steels in the 0.45 to 0.50 mean carbon content classification. In general, they are used for gears and other parts requiring high hardness as well as strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and joining. Filing Code: SA-871. Producer or source: European Committee for Standardization.


Alloy Digest ◽  
2021 ◽  
Vol 70 (11) ◽  

Abstract Lucefin 50CrMo4 is a medium-carbon, chromium-molybdenum direct hardening alloy steel that is also suitable for flame hardening, induction hardening, and nitriding. This steel is a medium hardenability steel in the 0.45 to 0.50 mean carbon content classification. In general, it is used for medium and large size parts requiring high hardness as well as high strength and good toughness. A minimum of 90% martensite in the as-quenched condition is desirable. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-877. Producer or source: Lucefin S.p.A.


Alloy Digest ◽  
2021 ◽  
Vol 70 (7) ◽  

Abstract Voestalpine Australia 4140 is medium-carbon, chromium-molybdenum direct hardening alloy steel that is also suitable for flame hardening, induction hardening, and nitriding. This steel is a medium hardenability steel in the 0.40 to 0.42 mean carbon content classification. In general, it is used for medium and large size parts requiring high strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating, machining, and joining. Filing Code: SA-873. Producer or source: voestalpine High Performance Metals.


Alloy Digest ◽  
2020 ◽  
Vol 69 (6) ◽  

Abstract Lucefin Group 34CrMo4 and 34CrMoS4 are medium-carbon, 1% chromium-molybdenum direct hardening alloy steels that are also suitable for flame and induction hardening, and nitriding. These steels are medium hardenability steels in the 0.30 to 0.37 mean carbon content classification. They are used for water-quenched parts of moderate section size and for oil-quenched parts of small section size. In general, they are used for parts requiring high strength and toughness. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, machining, and joining. Filing Code: SA-863. Producer or source: Lucefin S.p.A.


Alloy Digest ◽  
2020 ◽  
Vol 69 (5) ◽  

Abstract Lucefin Group 37Cr4 and 37CrS4 are medium-carbon, 1% chromium, direct hardening alloy steels that are also suitable for flame and induction hardening. These steels are low hardenability steels in the 0.30 to 0.37 mean carbon content classification. They are used for water-quenched parts of moderate section size and for oil-quenched parts of small section size. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on high temperature performance as well as forming, machining, and joining. Filing Code: SA-862. Producer or source: Lucefin S.p.A.


Alloy Digest ◽  
2020 ◽  
Vol 69 (02) ◽  

Abstract Lucefin Group 41Cr4 and 41CrS4 are medium-carbon, 1% chromium, direct hardening alloy steels that are also suitable for flame and induction hardening. These steels are low hardenability steels in the 0.40 to 0.42 mean carbon content classification. They are used for small and medium size parts that require a higher degree of strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-860. Producer or source: Lucefin S.p.A..


Alloy Digest ◽  
2021 ◽  
Vol 70 (6) ◽  

Abstract CEN 34Cr4 and 34CrS4 are medium-carbon, 1% chromium, direct hardening alloy steels that are also suitable for flame and induction hardening. These steels are low hardenability steels in the 0.30 to 0.37 mean carbon content classification. They are used for water-quenched parts of moderate section size and for oil-quenched parts of small section size. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and joining. Filing Code: SA-872. Producer or source: European Committee for Standardization.


Alloy Digest ◽  
2021 ◽  
Vol 70 (12) ◽  

Abstract Aubert and Duval CNS (35NiCr6) is a medium-carbon, nickel-chromium, direct hardening alloy steel. It is a medium hardenability steel in the 0.30 to 0.37 mean carbon content classification. This steel is frequently used for water-quenched parts of moderate section size and for oil-quenched parts of small section size. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on casting. Filing Code: SA-878. Producer or source: Aubert & Duval S.A. (a member of the Eramet Group).


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