ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Effects of Gamma Irradiation on the Chemical Properties of Actin and Actomyosin of Meats (1961)

FUJIMAKI, MASAO ; ARAKAWA, NOBUHIKO ; OGAWA, GENGO

Oxford, UK : Blackwell Publishing Ltd

Journal of food science 26 (1961), S. 0

add to mindlist on the mindlist

Details

ISSN: 1750-3841

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology

Notes: Effects of gamma irradiation on the chemical properties of actin and actomyosin during aging of meats have been studied. Meats were irradiated with 4 × 106 rad of cobalt-60 gamma rays at 40° F in three steps, i.e., immediately after slaughter, at maximum rigor, and at “rigor off.” Actin and two kinds of actomyosin (AMS and AML, previously reported by authors) were isolated from irradiated and control meats. The contents of sulfhydryl groups and amino acids, viscosity, the activity of ATPase and ATP sensitivity of actin and actomyosin were determined. From the results, actin is thought to be only slightly sensitive to irradiation as compared with actomyosin, and the latter, especially AML (a long-time extracted actomyosin) is considered to be very sensitive. In this case, it is inferred that the depolymerization must have taken place in actomyosin molecule by irradiation on meats. The effects of the time of irradiation on the chemical properties of actomyosin in meats seem to be more remarkable at rigor off than at the other two steps.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2621.1961.tb00789.x

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Relation of H-2 expression on murine RCT(+) sarcoma cells to lung colonization and sensitivity to NK cells (1988)

Masuyama, Kiichi ; Ochiai, Hiroshi ; Ishizawa, Shin ; [et al.]

Springer

Journal of cancer research and clinical oncology 114 (1988), S. 487-492

add to mindlist on the mindlist

Details

ISSN: 1432-1335

Keywords: H-2 expression ; Lung colonization ; NK cells

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Murine RCT(+) sarcoma cells were sorted using a fluorescence-activated cell sorter with regard to the expression of H-2 antigens and then an increased H-2-expressing subclone was established, and named RCT(+)H-2+. The experimental metastasis of RCT(+) cells was compared with that of RCT(+)H-2+ cells by counting pulmonary colonies on the 21st day after i.v. inoculation of tumor cells (5–10×104/mouse). When mice were inoculated with RCT(+) cells, mean numbers of pulmonary colonies were 2.1(range 0–6), 2.8(range 0–7) using 5×104 and 1×105 cells, respectively. On the other hand, in the mice inoculated with RCT(+)H-2+ cells, figures obtained were 7.0(range 4–16), 31.9(range 13–79), using 5×104 and 1×105 cells, respectively. The survival rate of RCT(+)H-2+ cells was higher than that of RCT(+) cells, when this was assayed in the early stage after i.v. injection of 51Cr-labeled cells (1×105 cells/mouse). In addition, RCT(+)H-2+ cells were more resistant than RCT(+) cells to lysis mediated by natural killer cells. These data suggest that an increase in metastatic ability was paralleled by an increase in the H-2 antigen expression and a decrease in sensitivity to the natural killer cells.