Slowly Digestible Starch from Debranched Waxy Sorghum Starch: Preparation and Properties     

Sang Ick Shin  Hea Jin Choi  Koo Min Chung  Bruce R. Hamaker  Kwan Hwa Park  Tae Wha Moon 《Cereal Chemistry》2004,81(3):404-408

Effects of debranching time, storage time, and storage temperature on production and structural properties of slowly digestible starch (SDS) were investigated. Waxy sorghum starch was hydrolyzed by isoamylase for various times (0–24 hr), and the variously debranched products were stored at ‐30, 1, and 30°C for 1–6 days. Optimal conditions for SDS production were isoamylase treatment for 8 hr and storage at 1°C for three days, resulting in SDS content of 27.0% in the optimum product. Microscopic observation revealed that rapidly digestible starch (RDS) and SDS were removed from the edges and surfaces of the optimum product by α‐amylase digestion. Digestion conditions that removed RDS and SDS resulted in a residue with a higher transition temperature and enthalpy than raw starch on a differential scanning calorimetric thermogram. Removal of RDS alone did not cause distinct decrements of peak temperature (T_p) and enthalpy (ΔH) compared with stored starch. The optimum SDS product showed an amorphous type of X‐ray diffractogram. Digestive removal of RDS from the optimum product gave a residue with X‐ray peaks similar to B type, which supports that it is partly crystalline. Removal of RDS and SDS gave broader peaks in the X‐ray pattern.  相似文献   

Changes in distribution,morphology and ultrastructure of chloride cell in Atlantic salmon during an AGD infection     

Yao‐Chung Chang  Harry Hamlin‐Wright  Sean Monaghan  Tharangani Herath  Johanna Baily  Jorge del Pozo  Jamie Downes  Andrew Preston  Lynn Chalmers  Nilantha Jayasuriya  James E. Bron  Alexandra Adams  Sophie Fridman 《Journal of fish diseases》2019,42(10):1433-1446

  相似文献   

Reconsidering North Korean defectors: Social and semantic network analyses of YouTube videos on North Korean defectors     

Sae Won Chung  Yongmin Kim 《Asia Pacific viewpoint》2023,64(2):255-267

This study investigates the North Korean defector phenomenon by approaching YouTube as an internet forum for public discourse, using the novel analytic approaches of social network analysis, text mining and semantic analysis. The research produced three main findings. First, individual YouTube content creators are most influential in the video networks pertaining to the subject of North Korean defectors. Second, on YouTube space, the image of North Korea tends to be negative because of the prevalence of defectors' testimony of their life experiences. Finally, such negative narratives of North Korea on YouTube might have a negative influence by blocking the reunification of Korea. In conclusion, this study suggests the South Korean government and other relevant global actors should conduct thorough and continuous examinations of North Korean defectors' perceptions of South Koreans and vice versa. This study calls for the international community to take further action to formulate proper policy instruments.  相似文献   

Texture and In Vitro Digestibility of White Rice Cooked with Hydrocolloids     

Hyun-Jung Chung  Qiang Liu  Seung-Taik Lim 《Cereal Chemistry》2007,84(3):246-249

  相似文献   

Pressurized Solvent Extraction of Genistein and Its β‐Glucoside Conjugates from Soybean Flours and Soy‐Based Foods     

J. M. Downing  O. K. Chung  P. A. Seib  J. D. Hubbard 《Cereal Chemistry》2007,84(1):44-47

  相似文献   

Pituitary porcine growth hormone (pGH) and a recombinant pGH analog stimulate pig growth performance in a similar manner   总被引：5，自引：0，他引：5  

C M Evock  T D Etherton  C S Chung  R E Ivy 《Journal of animal science》1988,66(8):1928-1941

This study was conducted to establish the extent to which different doses of pituitary porcine growth hormone (ppGH) increase pig growth performance. Pigs were treated daily for 11 wk with 0, 35 or 70 micrograms ppGH/kg BW. In addition, these effects were compared with those produced by treating pigs with 0, 35, 70 or 140 micrograms.kg BW-1.d-1 of a recombinantly derived analog of porcine growth hormone (rpGH). This analog lacks the first seven amino acids at the NH2 terminus. Growth rate was increased similarly by ppGH and rpGH (the maximal increase was 19%). Feed efficiency was improved by ppGH and rpGH (the maximal response was 25%). This improvement in feed efficiency was associated with a decrease in feed intake (17% with the largest dose of rpGH). Both ppGH and rpGH decreased adipose tissue growth and increased muscle mass. Carcass lipid was decreased by 68% in pigs treated with the largest dose of rpGH. The recombinant pGH analog appeared to be less potent than ppGH in decreasing adipose tissue growth rate. All other parameters measured, however, indicated that rpGH mimicked the biological effects of ppGH (including binding to pig liver membranes and induction of insulin-like growth factor I production). Sensory panel evaluations indicated that neither ppGH nor rpGH affected pork palatability. Larger doses of pGH (greater than 70 micrograms/kg BW) adversely affected pig mobility. This impairment in mobility appears to be due to osteochondrosis. Our findings establish that the rpGH analog is equipotent to ppGH in stimulating growth performance and that pigs can be treated without any significant adverse effects when they are treated with less than 70 micrograms of pGH.kg BW-1.d-1.  相似文献   

Ovine arthrogryposis and central nervous system malformations associated with in utero Cache Valley virus infection: spontaneous disease     

J F Edwards  C W Livingston  S I Chung  E C Collisson 《Veterinary pathology》1989,26(1):33-39

Gross appearance and histologic lesions seen in 15 newborn lambs in an outbreak of congenital arthrogryposis with hydrocephalus or hydranencephaly (CAH) in Texas are described. Severe arthrogryposis with skeletal muscle hypoplasia was seen in limbs of affected lambs. Spinal column deformities were also present. Multiple central nervous system (CNS) malformations were present in CAH lambs including micrencephaly, cerebellar hypoplasia, micromelia, hydrocephalus, hydranencephaly, and porencephaly. Histologic lesions consisted primarily of areas of necrosis and loss of the paraventricular neuropil and motor neurons in the CNS and a resolving myositis with poorly developed myotubular myocytes in skeletal muscle. Seroepidemiologic studies on the flock and serologic data from heart blood taken from the stillborn affected lambs indicated that the outbreak was due to in utero infection with Cache Valley Virus.  相似文献   

The (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium) colorimetric assay for the quantitation of Actinobacillus pleuropneumoniae cytotoxin.          下载免费PDF全文

W B Chung  L R Bckstrm  J McDonald    M T Collins 《Canadian journal of veterinary research》1993,57(3):159-165

Using swine neutrophils as target cells, two MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium) colorimetric assay systems, one with and one without phorbol 12-myristate 13-acetate (PMA) stimulation were established for the quantitation of Actinobacillus pleuropneumoniae cytotoxin. The MTT assays were optimized for the number of neutrophils, incubation time, and PMA concentration by a series of experiments. The optimal conditions were 25 x 10(4) cells/well incubated for four hours for the assay system without PMA stimulation, and 12.5 x 10(4) cells/well incubated for two hours for the assay system with PMA stimulation. One culture supernatant of a toxigenic Pasteurella multocida strain and five A. pleuropneumoniae cytotoxin preparations produced from three A. pleuropneumoniae strains were used to test assay reproducibility. Results showed both assays were reproducible with a coefficient of variation ranging from 7.8 to 18% for the assay system without PMA stimulation and from 10.7 to 18.2% for the assay system with PMA stimulation. The PMA-stimulated assay had 40 to 60-fold higher sensitivity than the nonstimulated MTT assay. The MTT assay also was applied to the measurement of neutralizing antibody titers against A. pleuropneumoniae cytotoxin.  相似文献   

商业生产条件下的最佳维生素营养   总被引：1，自引：0，他引：1  

冯静芳  T.K.Chung 《国外畜牧学(猪与禽)》2003,23(3):22-24

日粮中添加维生素不再只是为了预防缺乏症的问题。最近的研究表明，日粮含较高水平的维生素可使现代动物表现其遗传潜力。维生素与氨基酸不同，氨基酸可按其限制性分类，而对维生素则应予以综合考虑。  相似文献   

马铃薯晚疫病菌在水及土壤中存活期限和状态的初步观察     

钟胜全  叶飞  曹以勤  李林英  徐秀华 《植物保护学报》1964,3(2):199-199

初步试验和观察结果表示马铃薯晚疫病菌在无定形的原生质团状态下能相当长时期地在水和土壤中保存其生活力。将病薯上的病菌接种于薯块切面上,大量繁殖后作如下处理:(1)用针将孢子囊挑入冷开水或普通自来水中,保存于20℃的温箱内。(2)将孢子囊冲洗到普通自来水中,稀释为每低倍镜视野含有60个孢子囊的悬浮液,倒入花盆内的轻松  相似文献