Cereal Chem. 79(1):64-71Several reduction grinding conditions were used on a Canadian Western Red Spring (CWRS) farina to yield flours of comparable protein content within three specific particle size ranges (132-193, 110-132, 85-110 µm) at three starch damage levels (3.0, 3.9, 7.0 Megazyme units). White salted noodles (1% w/w NaCl) were initially processed at a fixed absorption (32%). Dynamic oscillatory and large deformation creep measurements indicated that doughs with lower starch damage, thick or thin, exhibited lower G′ (storage modulus), higher tan δ (G′′ [loss modulus]/G′) values, and greater maximum strain during creep than doughs with higher starch damage. There were no clear trends between work input during sheeting and either starch damage or particle size. Instrumental texture analysis of raw noodles showed no significant differences due to either starch damage or flour particle size. Flours with fine particle size gave cooked noodles with the best textural attributes, whereas starch damage exhibited no consistent relationship with cooked noodle texture. Cooking loss was greatest Analytical MethodsProtein content (%N × 5.7) was determined by combustion nitrogen analysis (CNA) using a CNA analyzer (model FP-248 Dumas, Leco Corp., St. Joseph, MI) calibrated with EDTA. Ash content, starch damage, and farinograph absorption were determined by Approved Methods 08-01, 76-31, and 54-20, respectively (AACC 2000). Mixograph tests were conducted using a 2-g direct drive mixo-

Cereal Chem. 80(6):637-644Roller milling of hull-less barley generates mill streams with highly variable β-glucan and arabinoxylan (AX) content. For high β-glucan cultivars, yields >20% (whole barley basis) of a fiber-rich fraction (FRF) with β-glucan contents >15% can be readily obtained with a simple short mill flow. Hull-less barley cultivars with high β-glucan content require higher power consumption during roller milling than normal β-glucan barley. Recovery of flour from high β-glucan cultivars was greatly expedited by impact passages after grinding, particularly after reduction roll passages. Pearling before roller milling reduces flour yield and FRF yield on a whole unpearled barley basis, but flour brightness is improved and concentration of β-glucan in fiber-rich fractions increases. Pearling by-products are rich in AX. Pearling to 15-20% is the best compromise between flour and FRF yield and flour brightness and pearling byproducts AX content. Increasing conditioning moisture from 12.5 to 14.5% strongly improved flour brightness with only a moderate loss of flour yield on a whole unpearled barley basis. As moisture content was increased to 16.5%, flour yield declined without a compensating improvement in brightness, but the yield of fiber-rich fraction continued to increase and concentration of β-glucan in FRF also increased.

Numerical simulation of structural member behavior requires knowledge of mechanical properties. This study proposes a methodology to obtain reliable mechanical properties of the oriented strandboard (OSB) web of I-joists, including variability. OSB panel samples were scanned by X-ray densitometry to measure in-plane density variation. Specimens were cut from predefined homogeneous density areas in three different orientations (parallel, perpendicular, and diagonal to the strong axis) to measure three basic elastic properties required for an elastic model of the OSB web of I-joists: modulus of elasticity (MOE) parallel and perpendicular to the panel's strong axis and shear modulus (G). Given the required small specimen size, shear modulus was determined using a combination of in-plane tensile MOEs, including MOE at 458. Results showed a strong relationship between OSB density and small-scale mechanical properties: coefficients of determination (R 2 ) varied between 0.57 and 0.79. This provided information on I-joist OSB web mechanical properties as a function of density for input into a numerical model. Properties showed considerable variability in the 600 to 900 kg/m 3 density range, with a 207 percent increase in tensile modulus of elasticity in the parallel direction, 187 percent in the perpendicular direction, and 172 percent at 458. The mechanics-based OSB shear modulus equation used proved to be reliable.