PALATABILITY EVALUATION OF COOKED RICE USING ESTIMATION FORMULA INSTEAD OF SENSORY TEST

为建立大米的适口性评价公式，对大米进行了理化性质测定和感官试验。1984年试验样品19个，1985年试验样品21个，1986年试验样品31个。以上述理化性质为自变量，以因变量为，采用最小二乘法，发现碎米比(m)、煮米体积(p)、碘蓝值(n)、粘性(s)、黏附性(r)与感官评价（to）有密切关系。f -1 Tt = a M + b p + c N + d R + e SF-2 Tt = a M + b'P + c'N + d'R + e'S + f'，按生产年份和地区分为7组。对于这两个公式，用小组的数据制作了7个方程。我们尝试对每一组应用一个方程。从公式中tt与感官评价中tt相关性的显著性来判断其适用程度。结果发现f-2比f-1适用性更强，因为4个方程在7组中有5组或6组具有显著的相关性。对于f-2的适用性，对于编制方程的同一组，相关系数为0.75 ~ 0.94，在1%及以下水平上均显著。其余各组中，1986年对31个品种所建立的方程适用性最强，相关系数为0.21 ~ 0.85，在5%及以下水平上均显著。我们得到的最理想的方程如下。Tt = -0.040 + 0.030 p + 0.179 n + 1.427 r - 0.121 - 1.261

TOESTABLISH PALATABILITY ESTIMATION FORMULA OF COOKED RICE, THE MESUREMENT OF PHYSICOCHEMICAL PROPERTIES OF RICE AND THE SENSORY TEST OF COOKED RICE WERE CARRIED OUT. EXPERIMENTAL SAMPLES WERE 19 VARIETIES IN 1984, 21 IN 1985 AND 31 IN 1986.OF THE PHYSICOCHEMICAL PROPERTIES, BROKEN RICE RATIO (M), VOLUME OF COOKED RICE (P), IODINE BLUE VALUE (N), STICKINESS (S) AND ADHESIVENESS (R) WERE FOUND TO HAVE THE CLOSE RELATION WITH SENSORY EVALUATION (TO) BY LEAST SQUARES METHOD USING THE ABOVE-MENTIONED PROPERTIES AS THE INDEPENDENT VARIABLES AND TO AS THE DEPENDENT VARIABLE.F-1 Tt = a M + b p + c N + d R + e SF-2 Tt = a'M + b'P + c'N + d'R + e'S + f'THE SAMPLES WERE DIVIDED INTO 7 GROUPS ACCORDING TO THE PRODUCTION YEAR AND AREA. FOR THE TWO FORMULAS, 7 EQUATIONS WERE MADE WITH THE GROUPS' DATA. WE TRIDE TO APPLY ONE EQUATION FOR EACH GROUP. THE DEGREE OF ITS APPLICABILITY WAS JUDGED FROM THE SIGNIFICANCE OF CORRELATION BETWEEN TT IN THE FORMULAS AND TO IN SENSORY EVALUATION.AS THE RESULT, F-2 WAS FOUND TO HAVE MORE APPLICABILITY THAN F-1, BECAUSE 4 EQUATIONS SHOWED SIGNIFICANT CORRELATION IN 5 OR 6 OF THE 7 GROUPS.AS FOR THE APPLICABILITY OF F-2,IN REGARD TO THE SAME GROUPS THAT THE EQUATIONS WERE PREPARED FOR, THE CORRELATION COEFFICIENTS WERE 0.75-0.94 AND ALL WERE SIGNIFICANT AT THE 1% OR LESS LEVEL. IN REGARD TO THE OTHER GROUPS, THE EQUATION WHICH WAS MADE FOR 31 VARIETIES IN 1986 SHOWED THE MOST APPLICABILITY, THE CORRELATION COEFFICIENTS WERE 0.21-0.85, AND ALL WERE SIGNIFICANT AT THE 5% OR LESS LEVEL.THE MOST DESIRABLE EQUATION WE HAVE GOT WAS AS FOLLOWS.Tt =-0.040M+0.030P+0.179N+1.427R-0.121S-1.261