Swelling of granules

Differences in the swelling of granules have been observed that are two-... 

It is composed of about 25% amylose (anhydrogluco-pyranose units joined by glucosidic bonds) and 75% amylopectin, a branched-chain structure. Properties White, amorphous, powder or granules tasteless. Various crystalline forms may be obtained, including microcrystalline. Irreversible gel formation occurs in hot water swelling of granules can be induced at room temperature with such compounds as formamide, formic acid, and strong bases and metallic salts. 

Treatment of granules with such reagents as liquid ammonia, liquid hydrocyanic acid, formaldehyde, formic acid, and alkalis causes swelling at room temperature, but little is known of the effects of such treatments. 

Fig. 4. An apoptotic peripheral blood eosinophil observed under EM. The apoptotic cell displays the characteristic condensation of nuclear chromatin into large, electron-dense masses surrounding the central, relatively electron-lucent nuclear matrix. The swelling and breakage of plasma and perinuclear membranes and the release of the contents of granules from swollen, enlarged, electron-lucent granule containers within secretory cells are also observed. A single osmiophilic lipid body is found in the cytoplasm (x 18,500) (D6). Reproduced with permission from Dvorak, A. M., Images in clinical medicine, an apoptotic eosinophil. N. Engl. J. Med. 340, 437 (1999).

The value of E o of the RB sample was 1.87 MPa and that of the YG sample was 2.01 MPa, respectively. Swelling of starch granules affected the storage modulus of the heated potato... 

In the case of the giant mudn granule of the terrestrial slug Ariolimax columbianus, the swelling of the mudn matrix upon release is remarkably fast,... 

Fig. 2. Video micrograph of exocytosis in a goblet cell grown in tissue culture. Notice that the swelling of a secretory granule has been captured at 3 consecutive times (inset). The radial expansion of the exocytosed granules follows a typical first-order kinetics. The continuous line is a non-linear least square fitting to the data points to r(t) = rf — (rf — rj e " /T, where r, and rr are the initial and final radius of the granule, and t is the characteristic relaxation time of swelling...

---