Hexane scanning electron micrograph

FIGURE 21 Scanning electron micrographs of crosslinked polymer prepared from a 3,9-bis(ethylidene-2,4,8,10-tetraoxaspiro[5,5]un-decane)/3-methyl-l,5-pentanediol prepolymer crosslinked with 1,2,6-hexane triol. Prepolymer contains 1 mol% copolymerized 9,10-dihydroxys tearic acid. Polymer rods, 2.4 x 20 mm, containing 30 wt% levonorgestrel and 7.1 mol% Mg(OH)2. Devices implanted subcutaneously in rabbits, (a) after 6 weeks, 30x (b) after 9 weeks, 30x (c) after 12 weeks, 25x (d) after 16 weeks, 25x. (From Ref. 18.)... 

A cross-sectional view of a C. digitata seed is shown in a scanning electron micrograph (SEMT in Figure 1. The section was treated with hexane before being sputter-coated (12) and is morphologically identical to a similar view of C. pepo (12). The seed coat comprises the somewhat thin outer boundary of TRe section and the remainder is composed of two cotyledons separated by the first "true" leaves of the embryo. 

Figure 1, Scanning electron micrograph of a cross section of a dormant, hexane-treated seed of Cucurbita digitata. Note outer seed coats, two cotyledons (C), and central cleft that contains first "true" leaves between the cotyledons. Bar represents 1 mm.

Fig.18a-b. Scanning electron micrographs on cryo fractured surfaces of a macroporous epoxy prepared with 6 wt % hexane via the Cl PS technique showing a narrow size distribution b macroporous epoxy prepared with 7.5 wt % hexane via the CIPS technique showing a narrow size distribution. Reprinted from Polymer, 37(25). J. Kiefer, J.G. Hilborn and J.L. Hedrick, Chemically induced phase separation a new technique for the synthesis of macroporous epoxy networks p 5719, Copyright (1996), with permission from Elsevier Science... 

Fig. 8.5 Capsaicin accumulates in blisters/vesicles on surface of placenta, left panel) Total ion chromatogram of oil in habanero vesicle. The oil in the vesicle was collected directly with a Hamilton syringe, diluted with hexane, and analyzed on a varian GC-MS, DB-5 column. The capsaicin peak was identified based on match with NIST MS library, right upper panel) A stereoscope view of habanero placenta (5x magnification) and seeds are visible upper left panel). Arrows indicate blisters, right lower panel) A scanning electron micrograph of habanero placenta (40 X magnification). A color version of the image is on line...

Scanning electron micrographs taken from control (non-treated) and leaves that were previously treated by the extraction processes mentioned above revealed significant differences between the microwave-assisted extracted leaves and all other mint leaves which had been extracted by means. This was true for dry, fresh, and re-hydrated leaves. In fact, it was clear that the process by which the extraction occurs when using microwaves was fundamentally different from any other extraction processes investigated at the time. Actually, to the best of our knowledge, this assertion still holds true. In summary, the conclusions drawn from the micrographs taken from mint leaves that were subjected to extraction in hexane were as follows [1-6] ... 

Figure 1. Scanning electron micrographs of untreated (A), Soxhlet-extracted (B), and MAP-treated (C) fresh peppermint leaves (Mentha piperita L. Mitchum). The Soxhlet was carried out for 6 hours whereas the MAP treatment consisted of a single irradiation of 20 seconds. Hexane was used as solvent in both cases. Note the loss of structural characteristics of the surface of the Soxhlet-extracted specimen. The secretory gland is much reduced in size with the appearance of a deflated balloon as a result of the permeation and diffusion processes through its walls. Cavities created by the localised explosion of secretory glands characterise the MAP-treated sample (figure adapted from reference [6]).

Fig. 27. Scanning electron micrograph of polymer prepared from 3,9-bis (ethylidene-2,4,8,10-tetraoxaspiro [5,5] undecane) and a 60/40 mol ratio of rrans-cyclo-hexane dimethanol and 1,6-hexanediol. Polymer rods 2.4 x 20 mm containing 30 wt% levonorgestrei. and 2 wt% calcium lactate. Device implanted subcutaneously in rabbit for 10 weeks, 30X [25], Reprinted with permission...

Figure 2 Scanning electron micrographs of yeast cells from toluene (left), hexane (middle), and decane (right). (From Ref. 73.)...

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