Hypobaric storage reduced core browning of Yali pear fruits

2017 ◽  
Vol 225 ◽  
pp. 547-552 ◽  
Author(s):  
Jian Li ◽  
Xiaolin Bao ◽  
Yancong Xu ◽  
Meng Zhang ◽  
Qiwei Cai ◽  
...  
Keyword(s):  
Yali Pear

scholarly journals Pengaruh Penambahan Asam Sitrat Terhadap Proses Non-Enzimatik Browning Jus Buah Pir Yali (Pyrus bretschneideri Rehd.)

2020 ◽  
Vol 18 (3) ◽  
pp. 186
Author(s):  
Victoria Agatha Angela Sirait ◽  
Zulkifli Zulkifli ◽  
Tundjung Tripeni Handayani ◽  
Martha Lulus Lande
Keyword(s):  
Enzyme Activity ◽  
Citric Acid ◽  
Acid Concentration ◽  
Reducing Sugar ◽  
Enzymatic Browning ◽  
Soluble Carbohydrate ◽  
Citric Acid Concentration ◽  
Dehydrogenase Enzyme ◽  
Yali Pear ◽  
Dehydrogenase Enzyme Activity

The purpose of this study was to find out how effective citric acid is against the nonenzymaticprocess of browning Yali Pear fruit juice (Pyrus bretschneideri Rehd. Theresearch was conducted in a complete randomized design consisting of 5 replications. Thenon-enzymatic browning inhibition process was tested with citric acid treatment as the mainfactor with five concentrations ie 0% w/v, 2,5% w/v, 5% w/v, 7,5% w/v and 10% w/v.Qualitative parameters were dehydrogenase enzyme activity and reducing sugar level.Quantitative parameters were browning index and total soluble carbohydrate content.Levene test, analysis of variance, and Tukey test were performed at 5% significant level. Theresults showed that decrease in dehydrogenase enzyme activity occurs along with increasingthe concentration of citric acid. The level of reducing sugar has increased along with theincrease of citric acid concentration. The 7,5% w/v citric acid concentration effectivelyinhibited non-enzymatic browning of Yali Pear juice with a 21% reduction in the browningindex. Total soluble carbohydrate content increased 7% at 7.5% w/v citric acidconcentration. From the results of the study it was concluded that citric acid at 7,5% w / vconcentration was the inhibitor of non-enzymatic browning and dehydrogenase enzymeactivity, but stimulator of total soluble carbohydrate and reducing sugar level.

Scolytus schevyrewi. [Distribution map].

2009 ◽  
Author(s):  
Keyword(s):  
South Dakota ◽  
Far East ◽  
Eastern Siberia ◽  
Distribution Map ◽  
Caragana Korshinskii ◽  
East Russia ◽  
Yali Pear ◽  
Salix Babylonica ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Scolytus schevyrevi Semenov. Coleoptera: Scolytidae. Hosts: elm (Ulmus spp.), Korshinsk pea shrub (Caragana korshinskii), oleaster (Elaeagnus spp.), plum (Prunus spp.), yali pear (Pyrus bretschneideri) and weeping willow (Salix babylonica). Information is given on geographical distribution in Europe (Eastern Siberia and Far East, Russia), Asia (Hebei, Heilongjiang, Henan, Ningxia, Qinghai, Shaanxi and Xinjiang, China; Kazakhstan; Korea Democratic People's Republic; Korea Republic; Kyrgyzstan; Mongolia; Tajikistan; Turkmenistan; and Uzbekistan) and North America (Alberta, Manitoba, Ontario and Saskatchewan, Canada, and Arizona, California, Colorado, Connecticut, Idaho, Illinois, Indiana, Kansas, Maryland, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Dakota, Texas, Utah, Virginia, Washington and Wyoming, USA).

Construction and transformation for the antisense expression vector of the polyphenol oxidase gene in Yali pear

2011 ◽  
Vol 5 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Guiqin Li ◽  
Jing Qi ◽  
Yuxing Zhang ◽  
Zhihua Gao ◽  
Dongqian Xu ◽  
...  
Keyword(s):  
Polyphenol Oxidase ◽  
Expression Vector ◽  
Oxidase Gene ◽  
Antisense Expression ◽  
Yali Pear
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