scholarly journals Effects of autoclaving and pullulanase debranching on the resistant starch yield of normal maize starch

2010 ◽  
Vol 75 (4) ◽  
pp. 449-458 ◽  
Author(s):  
Marija Milasinovic ◽  
Milica Radosavljevic ◽  
Ljubica Dokic

In this study, resistant starch (RS), type 3, was prepared by the autoclaving and debranching of normal maize starch isolated from a selected ZP genotype. The objectives of this study were to optimize both starch autoclaving and debranching with pullulanase (PromozymeBrewQ) for the production of RS. Autoclaving at 120?C (30 min) increased the RS content of all samples, whereas freezing at -20?C did not have an obvious effect on the RS contents. The highest RS yield in the autoclaved starch samples was 7.0 % after three autoclaving-cooling cycles. After pullulanase debranching at 50?C and retrogradation at 4?C, the RS yields ranged from 10.2% to 25.5 % in all samples (depending on the hydrolysis time). Debranched starch samples with a maximum RS yield of 25.5 % were obtained after a debranching time of 24 h. This study showed that starch from the selected ZP maize genotype is suitable for pullulanase treatment and RS preparation but that additional studies with a greater number of different treatments (incubation time/temperature) are necessary to manipulate and promote crystallization and enhance RS formation.

2021 ◽  
pp. 130344
Author(s):  
Wanhe Li ◽  
Zan Zhou ◽  
Songlin Fan ◽  
Xiunan Cai ◽  
Jian Chen ◽  
...  

2015 ◽  
Vol 35 (02) ◽  
pp. 192 ◽  
Author(s):  
Prima Interpares ◽  
Haryadi Haryadi ◽  
Muhammad Nur Cahyanto

The study was aimed to determine the optimal storage time of steamed maize starch noodle that gives the desirable properties along with the prebiotic potential. Noodle was prepared by extrusion of the partially cooked maize starch, followed by steaming the strands, and keeping strands at 4 C at various time (0, 1, 2, and 3 h) to enhance retrogradation, and then drying the noodle. The resulted noodle was characterized for physicochemical properties. To evaluate the prebiotic activity, the noodle was rehydrated, and then hydrolyzed by porcine pancreati 30 U/mg) and amyloglucosidase (enzym activity 300 U/mL) to obtain the resistant starch (RS) Type 3. The prebiotic activity of the RS was analayzed by the relative growth ratios of the probiotic bacterias, i. e. ATCC 15707 and   JCM 1551, to the enteric bacteria (  IFO 3301) on thefor control.The results showed that the longer storage time of the cooked starch noodle strands led to the higher values of hardness and cooking time, but lower cooking loss and swelling index, indicating the different level of retrogradation. Prebiotic activities of the RS obtained from cooked noodle strands kept for 3 h was 0.730 based on the growth rate of the , and 0.041 based on that of the . The score for the ocommercial RSI, commercial RSII and inulin were 1.058; 0.405; and 1.130 based on the growth of respectively. The prebioctic activities onfor the commercial RSI, commercial RS II and inulin were 0.062; 0.066; and 0.076 respectively.Keywords: Maize starch noodle, retrogradation, product property, prebiotic activity ABSTRAKPenelitian ini bertujuan untuk  pati jagung dan mengetahui nilai aktivitas prebiotik produk sebagai hasil pembentukan sifat fungsional prebiotiknya.Penelitian dilakukan dengan perlakuan variasi lama waktu retrogradasi 0, 1, 2 dan 3 jam pada pembuatan sohun terlarut, rehidrasi, rasio pengembangan, elongasi, , tekstur, dan kuat patah sohun kering). Hasil analisis dibandingkan dengan sampel komersial dan dipilih produk yang memiliki karakteristik sama dengan produk komersial. Produk terpilih dipreparasi menjadi RS ((30 U/mg) dan enzim amiloglukosidase (300 U/mL), lalu sampel dicuci dengan alkohol 50%, dikeringkan dandisimpan 4 C hingga pemakaian. Analisis nilai aktivitas prebiotik dilakukan dengan menumbuhkan bakteri probiotik (ATCC 15707JCM 1551) dan bakteri enterik (IFO3301) pada media yang mengandung substrat 1% RS sohun teretrogradasi,1% glukosa, 1% RS produk komersial, 1% inulin dan kontrol selama 24 jam pada 37oC.ATCC 15707 diinkubasi pada kondisi anaerobik sedangkan IFO 3301dan JCM 1551 diinkubasi secara aerobik. Nilai aktivitas prebiotik ditentukan berdasarkan pertumbuhan populasi sel bakteri probiotik dan enterik selama 0 dan 24 jam. Hasil penelitian menunjukkan perlakuan retrogradasi 3 jam pada suhu 4ooC menghasilkan sohun pati jagung dengan mutu yang paling mendekati produk komersial. Pengaruh lama waktu retrogradasi berbeda nyata terhadap kadar air produk akhir, lama pemasakan, totalkehilangan padatan terlarut, rasio pengembangan, dan tekstur. Nilai aktivitas prebiotik sohun pati jagung teretrogradasi3 jam pada pertumbuhan   sebesar 0,730 dan   0,041. Nilai aktivitas prebiotik komersial A,komersial B, dan inulin pada adalah 1,058; 0,405 dan 1,130 sedangkan pada  nilai aktivitasnya sebesar 0,062; 0,066; dan 0,076.Kata kunci: Sohun pati jagung, retrogradasi, mutu produk, nilai aktivitas prebiotik  


2016 ◽  
Vol 139 ◽  
pp. 10-19 ◽  
Author(s):  
Anju Teng ◽  
Torsten Witt ◽  
Kai Wang ◽  
Ming Li ◽  
Jovin Hasjim

2010 ◽  
Vol 58 (13) ◽  
pp. 8043-8047 ◽  
Author(s):  
Hongxin Jiang ◽  
Junyi Lio ◽  
Mike Blanco ◽  
Mark Campbell ◽  
Jay-lin Jane

Sign in / Sign up

Export Citation Format

Share Document