The relationship between the oxidative polymers of soybean oil and flavor reversion

1954 ◽  
Vol 31 (8) ◽  
pp. 324-327 ◽  
Author(s):  
S. S. Chang ◽  
F. A. Kummerow
1991 ◽  
Vol 68 (10) ◽  
pp. 769-771 ◽  
Author(s):  
Yasushi Endo ◽  
Hiromi Endo ◽  
Kenshiro Fujimoto ◽  
Takashi Kaneda

1948 ◽  
Vol 27 (3) ◽  
pp. 370-371 ◽  
Author(s):  
D.R. Claudinin ◽  
W.W. Cravens ◽  
C.A. Elvehjem ◽  
J.G. Halpin

METANA ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 57-64
Author(s):  
Setiarto Pratigto ◽  
Istadi Istadi ◽  
Dyah Hesti Wardhani

Penelitian ini akan mengkaji kinetika reaksi transesterifikasi minyak kedelai dengan metanol menggunakan katalis CaO dengan parameter rasio mol reaktan terhadap konversi metil ester yang digunakan untuk menentukan persamaan kecepatan reaksi. Katalis CaO digunakan untuk reaksi transesterifikasi karena memiliki kekuatan basa yang tinggi, ramah lingkungan, kelarutan yang rendah dalam metanol. Kinetika reaksi untuk reaktor batch dihitung saat reaksi berlangsung berdasarkan rejim surface area limited yang menentukan. Tujuan penelitian ini untuk mengetahui bentuk persamaan kecepatan reaksi transesterifikasi minyak kedelai dan metanol menggunakan katalis CaO menurut metode differential reactor. Penelitian dilakukan dengan reaksi transesterifikasi minyak kedelai dan metanol dengan katalis CaO dengan variabel bebas perbandingan mol reaktan. Hasil penelitian mengemukakan metanol teradsorpsi di permukaan katalis dan trigliserida tidak teradsorpsi di permukaan katalis menunjukkan mekanisme reaksi katalitik Eley-Rideal. Persamaan kecepatan reaksi dapat digunakan dalam perancangan reaktor, sehingga hubungan antara konversi trigliserida menjadi biodiesel dengan kebutuhan berat katalis dan volume reaktor yang diperlukan dapat diprediksi. This study will examine the kinetics of the transesterification reaction of soybean oil with methanol using a CaO catalyst with the parameters of the mole ratio of reactants to the conversion of methyl esters used to determine the reaction velocity equation. CaO catalyst is used for transesterification reaction because it has high base strength, environmentally friendly, low solubility in methanol. The reaction kinetics for a batch reactor are calculated when the reaction takes place based on a decisive surface area limited regime. The purpose of this study was to determine the shape of the speed equation for the transesterification of soybean oil and methanol using a CaO catalyst according to the differential reactor method. The research was carried out with the transesterification reaction of soybean oil and methanol with a CaO catalyst with a free variable ratio of reactant moles. The results of the study revealed that methanol adsorbed on the surface of the catalyst and triglycerides not adsorbed on the surface of the catalyst showed an Eley-Rideal catalytic reaction mechanism. The reaction speed equation can be used in reactor design, so the relationship between the conversion of triglycerides to biodiesel with the required catalyst weight and the reactor volume required can be predicted.


1967 ◽  
Vol 44 (2) ◽  
pp. 159-159 ◽  
Author(s):  
S. S. Chang ◽  
R. G. Krishnamurthy ◽  
B. R. Reddy

1946 ◽  
Vol 23 (6) ◽  
pp. 187-191 ◽  
Author(s):  
Calvin Golumbic ◽  
C. J. Martin ◽  
B. F. Daubert
Keyword(s):  

2018 ◽  
Vol 48 (3) ◽  
pp. 191-196 ◽  
Author(s):  
Giovanna Araújo de CARVALHO ◽  
Ana Karina Dias SALMAN ◽  
Pedro Gomes da CRUZ ◽  
Francyelle Ruana Faria da SILVA ◽  
Jéssica HALFEN ◽  
...  

ABSTRACT The relationship between the indices of thermal comfort and internal temperature in lactating cows was evaluated inRondônia, western Amazonia in a 2 × 2 crossover trial carried out with eight Girolando cows, ½ Holstein × ½ Gyr (n=4) and – Holstein × ¼ Gyr (n=4), grazing palisade grass supplemented with or without soybean oil concentrates. Data logger thermometers adapted to intravaginal devices (hormone free) were used to measure internal temperatures (IT) every 10 min over 48 h. Concomitantly, environmental parameters (air temperature, relative humidity, wind speed, and solar radiation) were collected for the estimation of the temperature-humidity index (THI), equivalent temperature index (ETI), and predicted respiratory rate (PRR). Supplementation with soybean oil did not affect the internal temperature of the cows. IT varied significantly between the genetic groups, with the highest mean observed at night in the – Holstein × ¼ Gyr cows, compared with that in the ½ Holstein × ½ Gyr cows (39.54 °C vs 39.06 °C, respectively). THI, ETI, and PRR were significantly and positively correlated with the IT of the Girolando cows; however, the PRR was not found to be adequate in indicating the night-time heat stress in cows.


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