Quality changes in macadamia kernel between harvest and farm-gate.

BACKGROUND: Macadamia integrifolia; Macadamia tetraphylla and their hybrids are cultivated for their edible kernels. After harvest; nuts-in-shell are partially dried on-farm and sorted to eliminate poor-quality kernels before consignment to a processor. During these operations; kernel quality may be lost. In this study; macadamia nuts-in-shell were sampled at five points of an on-farm postharvest handling […]

Dropping macadamia nuts-in-shell reduces kernel roasting quality

BACKGROUND: Macadamia nuts ('nuts-in-shell') are subjected to many impacts from dropping during postharvest handling; resulting in damage to the raw kernel. The effect of dropping on roasted kernel quality is unknown. Macadamia nuts-in-shell were dropped in various combinations of moisture content; number of drops and receiving surface in three experiments. After dropping; samples from each […]

The lipid messenger OEA links dietary fat intake to satiety

The association between fat consumption and obesity underscores the need to identify physiological signals that control fat intake. Previous studies have shown that feeding stimulates small-intestinal mucosal cells to produce the lipid messenger oleoylethanolamide (OEA) which; when administered as a drug; decreases meal frequency by engaging peroxisome proliferator-activated receptors-alpha (PPAR-alpha). Here; we report that duodenal […]

Priority Areas for Research on the Intake; Composition; and Health Effects of Tree Nuts and Peanuts

This article summarizes the main conclusions drawn from a conference on the health effects of nut consumption and identifies priority areas for future research. Individuals with higher intakes of nuts generally have higher intakes of many beneficial dietary constituents. More information is needed on nut composition; the bioavailability of nutrients; and other bioactive constituents. Better […]

Tree Nut and Peanut Consumption in Relation to Chronic and Metabolic Diseases Including Allergy

The New and Emerging Research session highlighted the emerging understanding of both the positive and negative effects of nuts consumption on health. The limited nature of both experimental and epidemiological evidence for positive relationship(s) between nut intake and health were noted. Study inconsistency and limitations; particularly survey methodology; were explored. Recent results from epidemiologic studies […]

Tree Nuts and Peanuts as Components of a Healthy Diet

Nuts have been part of the diet for thousands of years. In 2003; a Qualified Health Claim was approved; stating that eating 1.5 oz (42 g) of nuts per day may reduce the risk of heart disease. Usual intakes fall short of this recommendation. About one-third of Americans report consuming nuts (tree nuts or peanuts) […]

Impact of Peanuts and Tree Nuts on Body Weight and Healthy Weight Loss in Adults

Nuts (ground and tree) are rich sources of multiple nutrients and their consumption is associated with health benefits; including reduced cardiovascular disease risk. This has prompted recommendations to increase their consumption. However; they are also high in fat (albeit largely unsaturated) and are energy dense. The associations between these properties; positive energy balance; and body […]

The Role of Tree Nuts and Peanuts in the Prevention of Coronary Heart Disease: Multiple Potential Mechanisms

Epidemiologic and clinical trial evidence has demonstrated consistent benefits of nut and peanut consumption on coronary heart disease (CHD) risk and associated risk factors. The epidemiologic studies have reported various endpoints; including fatal CHD; total CHD death; total CHD; and nonfatal myocardial infarct. A pooled analysis of 4 U.S. epidemiologic studies showed that subjects in […]