Evaluation and Acceptability of Cassava Cultivars

1969 ◽  
Vol 67 (1) ◽  
pp. 16-21
Author(s):  
Oscar D. Ramírez ◽  
José J. Green ◽  
Isabel Beauchamp de Caloni
Keyword(s):  
Puerto Rico ◽  
Hydrocyanic Acid ◽  
Preliminary Evaluation ◽  
Manihot Esculenta Crantz ◽  
Organoleptic Evaluation ◽  
East Central ◽  
Mean Values ◽  
Overall Acceptability ◽  
The Mean ◽  
Toxicity Level

On the basis of yield and organoleptic evaluation, out of 10 cassava (Manihot esculenta Crantz) cultivars, IAC-12-829, IAC-Mantequeira, Jamaica 18 and Trinidad 14-56 are the most promising in this preliminary evaluation. The 10 cassava cultivars were evaluated in the hilly humid East Central region of Puerto Rico. The highest yielders were IAC 12-829, IAC-Mantequeira, Jamaica 18, and SRT-598-Sta. Catarina with 41.98, 39.24, 35.17 and 31 .13 tons/ha, respectively. Hydrocyanic acid content among cultivars was well below the toxicity level (50-100 mg/kg). The mean values ranged from 0.0 up to 22.3 mg HCN/kg of fresh peeled root. Regarding overall acceptability by the tasting panel all except Sta. Catarina cultivar were acceptable.

scholarly journals Performance of Cassava Cultivars in an Oxisol inNorthwestern Puerto Rico

1969 ◽  
Vol 68 (4) ◽  
pp. 375-381
Author(s):  
J. Badillo-Feliciano
Keyword(s):  
Puerto Rico ◽  
Acid Content ◽  
Manihot Esculenta ◽  
Hydrocyanic Acid ◽  
Manihot Esculenta Crantz ◽  
Organoleptic Evaluation ◽  
East Central

Fifty-five cassava cultivars (Manihot esculenta, Crantz) were evaluated for 3 consecutive years in a Coto clay (Oxisol) in northwestern Puerto Rico. The highest yielders, averaged over 3 years, were PI 12902, Jamaica 18, PI 9570 and PI 12003 with 34,345, 29,906, 26,845 and 24,684 kg/ha, respectively. The organoleptic evaluation reveals that all but PI 12903 were found to be acceptable. The hydrocyanic acid content among cultivars was below the moderately toxic levels, (50 p/m). These results are in line with previous work conducted in east central Puerto Rico.

CONCENTRADO PROTEICO OBTIDO DAS FOLHAS DE MANDIOCA (Manihot esculenta Crantz) DE TRÊS VARIEDADES COMERCIAIS.

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Izabel Aparecida Soares ◽  
Mauro Sérgio Téo ◽  
Carlise DEBASTIANI ◽  
Suzymeire BARONI ◽  
Vanessa Silva RETUCI
Keyword(s):  
Manihot Esculenta ◽  
Crude Protein ◽  
Hydrocyanic Acid ◽  
Protein Concentrate ◽  
Manihot Esculenta Crantz ◽  
White Variety ◽  
Mean Values ◽  
Randomized Design ◽  
Significant Difference ◽  
The Mean

O trabalho teve por objetivo verificar diferenças entre rendimento do concentrado proteico e proteína bruta da folha da mandioca (Manihot esculenta Crantz), obtidos a partir de três variedades comerciais: branca, cascuda e vermelha. As manivas foram plantadas seguindo o delineamento experimental inteiramente casualizado com três repetições. Nas comparações entre as variedades, considerou coletas escalonadas pós-plantio, realizadas aos 12, 14 e 16 meses. O concentrado proteico foi obtido a partir da farinha das folhas inteiras e submetido ao método de termo - coagulação ácido e a proteína bruta pelo método padrão AOAC. Os dados foram submetidos a análise de variância e comparados pelo teste de Tukey - 5% de probabilidade. Os resultados não indicaram diferença significativa entre as médias obtidas para rendimento de concentrado proteico. Para a variável porcentagem de proteína bruta a variedade Branca foi a que apresentou maior valor, com média de 46,25%, seguida pela Cascuda e Vermelha, 44,52% e 37,30%, sucessivamente. Conclui-se que outros estudos devem avaliar condições que possam influenciar no teor de proteína foliar, como clima e solo, e, avaliar os níveis de ácido cianídrico de cada variedade, indicando qual das três é a melhor para a extração do concentrado proteico das folhas. Palavras chaves: Manihot esculenta Crantz, variedades comerciais, concentrado proteico, proteína bruta. ABSTRACT: The study aimed to assess the differences between income protein concentrate, crude protein of cassava leaf (Manihot esculenta Crantz), obtained from three commercial varieties: white, red and cascuda. The cuttings were planted following the completely randomized design with three replications. Comparisons between the varieties considered after planting staggered collections, held on 12, 14 and 16 months. The protein concentrate was obtained from flour of whole sheets and subjected to the term method - acid coagulation and crude protein by AOAC standard method. The data were submitted to ANOVA and Tukey test - 5% probability. The results indicated no significant difference between the mean values obtained for protein concentrate income. For the variable percentage of crude protein White variety showed the highest, with an average of 46.25%, followed by cascuda and Red, 44.52% and 37.30%, successively. We conclude that further studies should evaluate conditions that may affect the leaf protein content, such as climate and soil, and evaluate the hydrocyanic acid levels of each variety, indicating which of the three is the best for the extraction of protein concentrate from leaves Key words: Manihot esculenta Crantz, commercial varieties, protein concentrate, crude protein.

scholarly journals Composition of Cassava (Manihot esculenta Crantz) and the Rheological Characteristics of its Starch

1969 ◽  
Vol 60 (1) ◽  
pp. 93-98 ◽  
Author(s):  
E. J. Rodríguez-Sosa ◽  
O. Parsi-Ros ◽  
M. A. González
Keyword(s):  
Puerto Rico ◽  
Dominican Republic ◽  
Acid Content ◽  
Proximate Composition ◽  
Manihot Esculenta ◽  
Tuberous Root ◽  
Hydrocyanic Acid ◽  
Rheological Characteristics ◽  
Manihot Esculenta Crantz ◽  
Toxicity Level

Proximate composition of two edible commercial varieties of cassava (M. esculenta Crantz) grown in Puerto Rico, and the rheological characteristics of their starch were determined. These included variety Pana which has a light tan skin and a dark-skinned variety known as Zenón, or Yuca Negra de Maca (Black Maca cassava), in the Dominican Republic. Proximate composition was found to be about the same for both varieties. Hydrocyanic acid content was well below the toxicity level (50 to 100 mg HCN/kg of fresh-peeled tuberous root). Although pasting temperatures were the same for both varieties (63° C), viscosity values of the starch of Pana variety were somewhat higher than those of Zenón.

scholarly journals Failure of preharvest foliage sprays with 2, 4-d and maleic hydrazide to affect the sucrose content of sugarcane

1969 ◽  
Vol 37 (1) ◽  
pp. 44-51
Author(s):  
M. A. Lugo-López ◽  
G. Samuels ◽  
R. Grant
Keyword(s):  
Puerto Rico ◽  
Seasonal Variations ◽  
Field Experiments ◽  
Maleic Hydrazide ◽  
Rio Grande ◽  
Weather Conditions ◽  
Sucrose Content ◽  
East Central ◽  
The Mean

Data are presented here on the effect of applications of 2,4-D and maleic hydrazide to sugarcane at intervals prior to harvesttime. Field experiments were conducted at Río Piedras in northern Puerto Rico and at Colonia Río Grande, between Caguas and Gurabo, in east-central Puerto Rico. Daily fluctuations in Brix, polarization, purity, and available 96° sugar percent cane were followed for 46- and 72-day periods, respectively. No significant differences were observed between the mean available 96° sugar percent cane that could be ascribed to treatments. Seasonal variations and variations attributable to weather conditions were rather important factors at both locations.

scholarly journals Relative Infiltration Rate of Puerto Rican Soils

1969 ◽  
Vol 52 (3) ◽  
pp. 233-240 ◽  
Author(s):  
M. A. Lugo López ◽  
J. Juárez ◽  
J. A. Bonnet
Keyword(s):  
Puerto Rico ◽  
Puerto Rican ◽  
Classification System ◽  
Sandy Loam ◽  
Infiltration Rate ◽  
Department Of Agriculture ◽  
Mean Values ◽  
Infiltration Rates ◽  
The Mean ◽  
The U.S

Data are presented here on the minimum rate of infiltration (eighth-hour) of 57 main soil types of Puerto Rico. The study included a total of 740 tests. Mean infiltration rates vary from a high value of 11.49 inches of water per hour in Yunque sandy loam, to a low of 0.07 in Aguirre clay, and 0.01 in Palmas Altas and Britton clay. When the soils were arranged according to a simple, practical classification system in use in Puerto Rico the mean values ranged from 0.01 in group 5w to 7.82 inches in group 11. When the soils were grouped following the latest classification system developed by the U.S. Department of Agriculture, mean values for soils included in the order Vertisol ranged from 0.07 to 3.83 inches. Mollisols, Oxisols, and Ultisols showed the highest infiltration values. Information is hereby given as to the effects of various soil treatments on infiltration rates.

scholarly journals ATENUACION DE LAS ONDAS DE LOVE EN UNA ZONA DEL ATLANTICO QUE COMPRENDE LA PLATAFORMA DE LAS BERMUDAS Y EL ARCO VOLCANICO DEL CARIBE

1981 ◽  
Vol 20 (1) ◽  
pp. 1-9
Author(s):  
J. A. Canas
Keyword(s):  
Puerto Rico ◽  
Atlantic Ocean ◽  
Love Waves ◽  
Attenuation Coefficients ◽  
Mean Values ◽  
The Mean ◽  
Q Values

The mean values of the attenuation coefficients of Love Waves in the range 28 to 80 seconds for the trajectories between the stations BEC (Bermuda Island), SJG (Puerto Rico) and CAR (Venezuela) were determined. The attenuation coefficients thus obtained are abnormally high, particularly for the periods ranging from 26 to 50 seconds; such values do not agree with the relationships found for the Atlantic Ocean.  This fact suggests that underneath the studied area a well developed zone of low Q values may exist.

Carcass and meat quality of second-cross cryptorchid lambs grazed on chicory (Cichorium intybus) or lucerne (Medicago sativa)

1995 ◽  
Vol 35 (6) ◽  
pp. 693 ◽  
Author(s):  
DL Hopkins ◽  
PJ Holst ◽  
DG Hall ◽  
WR Atkinson
Keyword(s):  
Medicago Sativa ◽  
Meat Quality ◽  
Subcutaneous Fat ◽  
Cichorium Intybus ◽  
Carcass Weight ◽  
Mean Values ◽  
B Values ◽  
Overall Acceptability ◽  
The Mean

The meat quality of cross-bred cryptorchid lambs (6 months old) that had been grazed on chicory (Cichorium intybus; n = 20) or lucerne (Medicago sativa; n = 20) for 8 weeks preslaughter was studied. Unfasted preslaughter liveweight (range 42.5-51.5 kg) was not affected (P>0.05) by treatment. There was no difference (P>0.05) between groups for age at slaughter, hot carcass weight, or measures of fatness GR and Fat C (fat depth over longissimus thoracis et lumborum) when adjusted to a common carcass weight of 21.9 kg. Lucerne-fed lambs were, however, significantly (P<0.05) fatter at the 5th rib. There was no significant (P>0.05) difference between groups for pH, colour values (where L* indicates relative lightness, a* relative redness, b* relative yellowness), Warner-Bratzler shear values, or cooking loss. There was no significant (P>0.05) difference between groups for mean fat colour score or for the distribution of the scores. The b* values for subcutaneous fat tended (P = 0.06) to be greater for lucerne-fed lambs. A comparison of the mean values for aroma and flavour of the longissimus thoracis et lumborum showed no significant (P>0.05) difference between groups and no difference in overall acceptability. Finishing lambs on the chicory cultivar used in this experiment did not adversely affect meat quality and did not result in fatter carcasses than lucerne-fed lambs.

scholarly journals Spacing, Nitrogen and Potassium on Yield and Quality of Cabezona Pineapple

1969 ◽  
Vol 67 (1) ◽  
pp. 1-10
Author(s):  
Carmen T. Ramírez ◽  
Enrique González Tejera
Keyword(s):  
Puerto Rico ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Fresh Market ◽  
Mean Values ◽  
Yield And Quality ◽  
The Mean ◽  
X 132

This study evaluates the effects of spacing, and of N and K2O on Cabezona pineapple, a big fruit planted solely for the fresh market and grown in an Inceptisol at Lajas, Puerto Rico. Treatment differentials consisted of 3 spacings (30.5, 46 and 61 cm) between plants within the row, 61 cm between rows and 132 em between double rows. Significant fruit yield increases occurred with treatment differentials. Up to 88.4 t/ha were obtained from plants spaced 30.5 cm and receiving 224 and 252 kg/ha of N and K2O, respectively. Fruit weight increased as spacing increased. The mean values were 2.9, 3.4 and 3.9 kg for the 30.5, 46 and 61 cm spacings, respectively. The greater number (19,442 fruits/ha) of the largest marketable fresh fruits (about 3.6 kg each) were obtained from plots spaced 46 x 61 x 132 cm, with 336 kg N and 168 kg K2O/ha. Close planting significantly reduced the number of slips per plant, values ranging from 2.7 to 8.7.

Articulatory Behavior Pre and Post Full-Mouth Tooth Extraction and Alveoloplasty

1980 ◽  
Vol 23 (3) ◽  
pp. 630-645 ◽  
Author(s):  
Gerald Zimmermann ◽  
J.A. Scott Kelso ◽  
Larry Lander
Keyword(s):  
Control Subject ◽  
High Speed ◽  
Tooth Extraction ◽  
Kinematic Parameters ◽  
Experimental Conditions ◽  
Mean Values ◽  
Articulatory Movements ◽  
The Mean ◽  
Experimental Subjects ◽  
Normal Speech

High speed cinefluorography was used to track articulatory movements preceding and following full-mouth tooth extraction and alveoloplasty in two subjects. Films also were made of a control subject on two separate days. The purpose of the study was to determine the effects of dramatically altering the structural dimensions of the oral cavity on the kinematic parameters of speech. The results showed that the experimental subjects performed differently pre and postoperatively though the changes were in different directions for the two subjects. Differences in both means and variabilities of kinematic parameters were larger between days for the experimental (operated) subjects than for the control subject. The results for the Control subject also showed significant differences in the mean values of kinematic variables between days though these day-to-day differences could not account for the effects found pre- and postoperatively. The results of the kinematic analysis, particularly the finding that transition time was most stable over the experimental conditions for the operated subjects, are used to speculate about the coordination of normal speech.

Comparative Study of Intranasal, Subcutaneous and Intravenous Administration of Desamino-D-Arginine Vasopressin (DDAVP)

1986 ◽  
Vol 55 (01) ◽  
pp. 108-111 ◽  
Author(s):  
M Köhler ◽  
P Hellstern ◽  
C Miyashita ◽  
G von Blohn ◽  
E Wenzel
Keyword(s):  
Factor Viii ◽  
Von Willebrand Factor ◽  
Factor Xii ◽  
Additional Advantage ◽  
Mean Values ◽  
Routes Of Administration ◽  
The Mean ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Factor Antigen

SummaryThis study was performed to evaluate the influence of different routes of administration on the efficacy of DDAVP treatment. Ten healthy volunteers received DDAVP intranasally (i.n.), subcutaneously (s.c.) and intravenously (i.v.) in a randomized cross-over trial. Factor XII and high molecular weight (HMW)-kininogen levels increased only slightly after DDAVP administration. The mean increase of factor VIII: C was 3.1 (i. v.), 2.3 (s. c.), and 1.3 (i.n.) - fold over baseline. Ristocetin cofactor (von Willebrand factor antigen) increased 3.1 (2.5), 2.0 (2.3) and 1.2 (1.2) - fold over baseline mean values after i.v., s.c. and i.n. DDAVP, respectively. The half-disappearance time of factor VIII and von Willebrand factor (vWF) after DDAVP ranged from five (factor VIII: C) to eight hours (vWF). The mean increase of fibrinolytic activity was more pronounced after i.v. DDAVP. The antidiuretic effect was moderate with no apparent differences between the routes of application. This study provides further evidence that both i.v. and s.c. DDAVP administration result in an appropriate and reliable stimulation of haemostasis. An additional advantage of s. c. administration is its suitability for home treatment.

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