| serotonin content of foods: effect on urinary excretion of 5-hydroxyindoleacetic acid. | using a highly specific radioenzymatic assay we determined the serotonin concentration in 80 types of foods. the following fruits had a high serotonin concentration (mean +/- sem) expressed in micrograms/g weight: plantain 30.3 +/- 7.5; pineapple 17.0 +/- 5.1; banana 15.0 +/- 2.4; kiwi fruit 5.8 +/- 0.9; plums 4.7 +/- 0.8; and tomatoes 3.2 +/- 0.6. only nuts in the walnut or hickory family had a high serotonin concentration expressed in micrograms/g weight; butternuts 398 +/- 90; black walnuts 3 ... | 1985 | 2413754 |
| maintenance carbon cycle in crassulacean acid metabolism plant leaves : source and compartmentation of carbon for nocturnal malate synthesis. | the reciprocal relationship between diurnal changes in organic acid and storage carbohydrate was examined in the leaves of three crassulacean acid metabolism plants. it was found that depletion of leaf hexoses at night was sufficient to account quantitatively for increase in malate in ananas comosus but not in sedum telephium or kalanchoë daigremontiana. fructose and to a lesser extent glucose underwent the largest changes. glucose levels in s. telephium leaves oscillated diurnally but were not ... | 1985 | 16664005 |
| neonatal tetanus in maputo, mozambique. part i. hospital incidence and childbirth practices. | the hospital incidence of neonatal tetanus cases in maputo, mozambique, from 1976 to 1982 is presented. after fluctuating between 173 and 254 cases/year in 1976-1978, the incidence has declined to 26 cases in 1982. the seasonal distribution of cases before the decline showed a bimodal pattern. a survey of 175 neonatal tetanus admissions in 1978-79 showed that most mothers delivered at home and many used traditional methods, including placing a variety of substances on the cord. between may 29, 1 ... | 1985 | 3872719 |
| comparison of activities and properties of pyrophosphate and adenosine triphosphate-dependent phosphofructokinases of black gram (phaseolus mungo) seeds. | both pyrophosphate-dependent phosphofructokinase (ppi-pfkase, ec 2.7.1.90) and atpdependent phosphofructokinase (atp-pfkase, ec 2.7. 1.11) were present in dry and germinated black gram seeds. in the absence of fructose-2,6-biphosphate (f2,6bp), the activity of ppi-pfkase expressed as nmol · min(-1) · (pair of cotyledons)(-1) was much lower than that of atp-pfkase in both dry and germinated seeds. however, ppi-pfkase was activated by f2,6bp and its activity reached the same level as atp-pfkase ac ... | 1984 | 23195152 |
| oxygen-18 incorporation into malic acid during nocturnal carbon dioxide fixation in crassulacean acid metabolism plants. a new approach to estimating in vivo carbonic anhydrase activity. | crassulacean acid metabolism (cam) plants fix carbon dioxide at night by the carboxylation of phosphoenolpyruvate. if co2 fixation is conducted with 13c18o2 , then in the absence of carbonic anhydrase, the malate formed by dark co2 fixation should also contain high levels of carbon-13 and oxygen-18. conversely, if carbonic anhydrase is present and highly active, oxygen exchange between co2 and cellular h2o will occur more rapidly than carboxylation, and the [13c] malate formed will contain littl ... | 1984 | 6427227 |
| diurnal variations in leaf fluorescence induction kinetics: variable fluorescence in crassulacean acid metabolism plants. | the variable fluorescence of leaves from kalanchoë daigremontiana and pineapple, ananas comosus, both cam plants, was found to change over a 24-hour cycle and to exhibit high temperature-dependent maxima during the night period. the time course of the induced fluorescence was correlated with malic acid accumulation but not with other aspects of cam such as with the nature of the decarboxylation pathway or with stomatal movements. the variable fluorescences of sunflower (helianthus annuus l.) and ... | 1983 | 16663024 |
| reproductive hazards in the workplace. development of epidemiologic research. | application of the techniques of epidemiology and clinical toxicology has accelerated study of the reproductive effects of toxic chemical and physical exposures in the workplace. three examples of work in progress are included in the present communication. the first concerns 1,2-dibromo-3-chloropropane, a known cause of male sterility, which continues to be used as a nematocide in hawaii. occupational exposures of hawaiian agricultural workers to airborne 1,2-dibromo-3-chloropropane are mainly i ... | 1983 | 6648424 |
| natural family planning works in a bukidnon town. | natural family planning is being actively promoted in a pineapple plantation of the philippine packing corporation (ppc) located in northern bukidnon province. prospective acceptors attend 4 seminars which cover sex education and instruction on natural family planning methods. the goal of the program is family life and marriage enrichment rather than family size limitation. thus, there is no target number of acceptors. early acceptors used the basal body temperature method, but this was subseque ... | 1983 | 12265792 |
| isolation of an effective debriding agent from the stems of pineapple plants. | the stem of the pineapple plant contains, in addition to a number of proteases, particularly bromelain, a non-proteolytic component which is responsible for the complete bridement of experimental burns by an "enzymatic dissection" between the viable native and the non-viable denatured burn tissue. with very little scraping, using a tongue depressor, all of the eschar can be removed and a bed suitable for grafting results. this "escharase" has a molecular weight of 45,000 daltons and is a trimer ... | 1983 | 6352539 |
| of pillows and pineapple juice. | | 1981 | 6910343 |
| transit of a meal through the stomach, small intestine, and colon in normal subjects and its role in the pathogenesis of diarrhea. | a method for measuring the transit time of a meal, containing sausages, mashed potato, baked beans, and a pineapple custard dessert, through the gastrointestinal tract was evaluated in 14 healthy volunteers. gastric emptying was determined by incorporating a radioactive marker in the meal and counting over the surface of the stomach using a crystal scintillation detector. small intestinal transit time was determined by measuring breath hydrogen excretion and by estimating the radioactivity over ... | 1980 | 7439633 |
| gas-liquid chromatographic determination of bromacil residues. | a simple, fast, and accurate method has been developed to determine residues of bromacil (5-bromo-3-sec-butyl-t-methyluracil) herbicide. following sample extraction, filtration, and concentration, the herbicide is determined using a gas chromatograph equipped with a thermionic nitrogen/phosphorus detector. the method has been used to recover 0.04 ppm bromacil added to citrus, pineapple, soil, and water, and 0.1 ppm bromacil added to alfalfa hay. | 1980 | 7380790 |
| photosynthetic pathway and biomass energy production. | the current interest in locating new or alternative sources of energy has focused attention on solar energy capture by crops that can be subsequently utilized as a substitute for fossil fuels. the very high productivity of sugarepane and the fact that it accumulates sugars that are directly fermentable to alcohol may have caused seemingly less productive crops to be overlooked. we show here that recoverable alcohol from achievable commercial yields of pineapple can actually equal that of sugarca ... | 1979 | 17729660 |
| pyrophosphate-dependent 6-phosphofructokinase, a new glycolytic enzyme in pineapple leaves. | | 1979 | 219853 |
| the lignin fraction of plant cell walls. | methods are discussed for determining lignin in plant cell walls. the increase in apparent lignin content that may occur as a result of artifacts produced during food preparation is also discussed. the phenolic components, including lignin, of cell walls separated from 12 vegetable, fruit, and cereal foods are determined. wheat bran, on a fresh weight basis, had a high cell wall content (48.6%) compared with the vegetables and fruit whose contents ranged from 1.0 to 6.0%. wheat bran and spinach ... | 1978 | 707399 |
| apparent sequence homology among leguminosae small molecular weight, cystine rich protease inhibitors and pineapple stem bromelain inhibitors. | | 1978 | 755328 |
| neutron activation analysis of pineapple. | | 1977 | 609066 |
| homology of functionally diverse proteins. | disulphide-rich proteins of widely differing functions were aligned with the aid of their half-cystinyl residues. this led to the grouping of ribonuclease, phospholipase a, lysozyme, snake venom toxins, bee and scorpion venom peptides, and the plant proteins potatoe carboxypeptidase inhibitor, ragweed pollen allergen, mistletoe toxins and pineapple sulfhydryl protease inhibitor into one super-family of proteins. very few deletions/insertions were needed to effect alignment and probabilities were ... | 1977 | 894736 |
| characterization of phosphoenolpyruvate carboxykinase from pineapple leaves ananas comosus (l.) merr. | phosphoenolpyruvate carboxykinase has been partially purified from pineapple (ananas comosus [l.]) leaves. specific activities obtained show it to be a major activity in this tissue. above 15 c, the respective activation energies for decarboxylation and carboxylation are 13 and 12 kcal/mol. below 15 c, there are discontinuities in arrhenius plots with an associated large increase in activation energy. the adenine nucleotides are preferred to other nucleotides as substrates. the apparent km value ... | 1977 | 16659905 |
| carbon dioxide exchange and acidity levels in detached pineapple, ananas comosus (l.), merr., leaves during the day at various temperatures, oxygen and carbon dioxide concentrations. | the effects of temperature, o(2), and co(2) on titratable acid content and on co(2) exchange were measured in detached pineapple (ananas comosus) leaves during the daily 15-hour light period. comparative measurements were made in air and in co(2)-free air. increasing the leaf temperature from 20 to 35 c decreased the total co(2) uptake in air and slightly increased the total co(2) released into co(2)-free air. between 25 and 35 c, the activation energy for daily acid loss was near 12 kcal mol(-1 ... | 1977 | 16659832 |
| letter: dissolution of phytobezoar using pineapple juice. | | 1976 | 989128 |
| abortifacient effect of steroids from ananas comosus and their analogues on mice. | | 1976 | 943531 |
| acidic cysteine protease inhibitors from pineapple stem. | | 1976 | 1012030 |
| cellulase activity, endogenous abscisic acid, and ethylene in four citrus cultivars during maturation. | at maturity, the fruit of two early maturing orange cultivars, hamlin and pineapple (citrus sinensis [l.] osbeck), contained more ethylene and abscisic acid than the late maturing valencia and lamb summer (c. sinensis [l.] osbeck) cultivars. ethylene (up to 95 nl/l in internal atmosphere) and abscisic (50 mug/kg dry weight flavedo) increased most rapidly in pineapple, leading to increased cellulase activity and loosening of the fruit. fruit of the two late maturing cultivars contained less than ... | 1975 | 16659390 |
| studies on indian medicinal plants: part xxxii. constituents of ananas comosus (linn.) merr. leaves. | | 1975 | 1228013 |
| postillumination burst of carbon dioxide in crassalacean acid metabolism plants. | immediately following exposure to light, a postillumination burst of co(2) has been detected in crassulacean acid metabolism plants. a detailed study with pineapple (ananas comosus) leaves indicates that the postillumination burst changes its amplitude and kinetics during the course of a day. in air, the postillumination burst in pineapple leaves generally is exhibited as two peaks. the postillumination burst is sensitive to atmospheric co(2) and o(2) concentrations as well as to the light inten ... | 1975 | 16659142 |
| characterization of the pineapple stem proteases (bromelains). | | 1975 | 1124936 |
| primary structural analysis of sulfhydryl protease inhibitors from pineapple stem. | pineapple stem acetone powder provides a rich source of the sulfhydryl protease bromelain and of a family of compositionally similar but chromatographically distinct polypeptide inihibtors of this enzyme. the isoinhibitors have molecular weights of 5600, and they contain five disulfide bonds and about 50 amino acids each (perlstein, s. h., and kezdy, f.j. (1973) j. supramol. struct. 1, 249-254). primary structural analysis of one of the seven inhibitor fractions (vii) revealed extensive microhet ... | 1975 | 1112827 |
| photosensitized inactivation of stem bromelain. oxidation of histidine, methionine, and tryptophan residues. | pineapple stem bromelain was photooxidized in the presence of methylene blue used as a sensitizer. the essential sulfhydryl group of the enzyme protein rapidly became inaccessible to react with 5,5'-dithiobis(nitrobenzoic acid), but the reactivity was readily regained to the original level upon treatment with dithiothreitol. even after such reduction, the photooxidized enzyme showed a markedly decreased hydrolytic activity on casein. spectral examination revealed that the oxidized enzyme had tyr ... | 1975 | 1120100 |
| carboxypeptidase in commercial bromelain powder. partial purification and some properties of pineapple carboxypeptidase. | | 1974 | 4412316 |
| [determination of sulfur dioxide in frozen peeled shrimp and dehydrated pineapple]. | | 1974 | 4477508 |
| phosphoenolpyruvate carboxykinase in plants exhibiting crassulacean acid metabolism. | phosphoenolpyruvate carboxykinase has been found in significant activities in a number of plants exhibiting crassulacean acid metabolism. thirty-five species were surveyed for phosphoenolpyruvate carboxykinase, phosphoenolpyruvate carboxylase, ribulose diphosphate carboxylase, malic enzyme, and malate dehydrogenase (nad). plants which showed high activities of malic enzyme contained no detectable phosphoenolpyruvate carboxykinase, while plants with high activities of the latter enzyme contained ... | 1973 | 16658562 |
| fractionation and some properties of the proteolytically active components of bromelains in the stem and the fruit of the pineapple plant. | | 1972 | 5073324 |
| chemical composition of mexican pineapple. | | 1972 | 4666846 |
| pesticide and growth regulator residues in pineapple. | | 1971 | 4929326 |
| comparative trial of nutrizym in chronic pancreatic insufficiency. | a cross-over trial of pancreatic replacement therapy was carried out in 12 adults with chronic pancreatic insufficiency. the standard enteric-coated preparation, pancrex v forte, was compared with nutrizym, which has an enteric-coated core of pancreatic extract and a shell of bromelains-a mixture of proteolytic enzymes derived from the stem of the pineapple.nutrizym was significantly more effective than pancrex v forte in improving fat absorption, and reduced faecal weight. protein digestion was ... | 1970 | 4919118 |
| the composition and structure of the carbohydrate of pineapple stem bromelain. | | 1969 | 4309986 |
| gastrointestinal response to diets containing pineapple. | | 1968 | 5742049 |
| auxin-induced ethylene formation: its relation to flowering in the pineapple. | within i day after pineapple plants are treated with naphthalene acetic acid they begin producing ethylene. it is suggested that applied auxins mimic the action of ethylene by stimulating ethylene formation, and that ethylene, not auxin, causes pineapples to flower. | 1966 | 5937118 |
| on a minor component of proteolytic enzymes contained in the pineapple fruit. | | 1966 | 5961495 |
| heme proteins. vi. crystalline pineapple peroxidase b. | | 1966 | 5958216 |
| evapotranspiration of pineapple in hawaii. | | 1965 | 16656150 |
| tryptamine oxidation by extracts of pea seedlings: effect of growth retardant beta-hydroxyethylhydrazine. | beta-hydroxyethylhydrazine forces flowering of pineapple plants, possibly by reducing auxin concentration. a specific and sensitive assay showed that beta-hydroxyethylhydrazine (3.3 x 10(-7)m) inhibits noncompetitively and almost completely the oxidation of tryptamine to indoleacetaldehyde by extracts of pea-seedling (pisum sativum l. var. alaska). the relative rate of oxidation of putrescine to delta(1)-pyrroline compared to that of tryptamine by these extracts and the inhibition of both reacti ... | 1965 | 14289611 |
| [bromelin, a protease of pineapple with antiedema action (ananase)]. | | 1965 | 14293137 |
| orally induced fibrinolysis. a critical assessment of pineapple protease. | | 1964 | 14254697 |
| pineapple proteases in the treatment of scleroderma; a case report. | | 1964 | 14143037 |
| the coenzyme requirement and enzyme inhibitors of pineapple indoleacetic acid oxidase. | | 1958 | 13575446 |
| dermatological hazards of the pineapple industry. | | 2006 | 13428186 |
| [erythema multiforme caused by allergy to pineapple; case report]. | | 1957 | 13432316 |
| pineapple chlorosis in relation to iron and nitrogen. | | 1956 | 16654866 |
| prevention of eye accidents in sugar and pineapple industries of hawaii. | | 1956 | 13285929 |
| effect of maleic hydrazide on pineapple. | | 1956 | 16654842 |
| [treatment of cervical erosions with siberian pineapple oil]. | | 2016 | 13282819 |
| report on wax from several species of tillandsia and from ananas comosus (l.) merr. | | 1955 | 17801092 |
| toxicity to pineapple plants of biuret found in urea fertilizers from different sources. | | 1954 | 17753560 |
| indoleacetic acid oxidase and an inhibitor in pineapple tissue. | | 1953 | 13117833 |
| distribution of total soluble solids, ascorbic acid, total acid, and bromelin activity in the fruit of the natal pineapple (ananas comosus l. merr.). | | 1953 | 16654569 |
| ascorbic acid and physiological breakdown in the fruits of the pineapple (ananas comosus l. merr). | | 1952 | 13015097 |
| composition of honeydew excreted by pineapple mealybugs. | | 1952 | 14913190 |
| pineapple dermatosis. | | 1951 | 14895783 |
| growth of ananas comosus (l.) merr., at different levels of mineral nutrition under greenhouse and field conditions. ii. chemical composition of the tissues at different growth intervals. | | 1951 | 16654385 |
| individual variation of the fruits of the pineapple (ananas comosus l. merr.) in regard to certain constituents of the juice. | | 2016 | 14840519 |
| physiological studies of the fruits of the pineapple [ananas comosus (l.) merr.] with special reference to physiological breakdown. | | 1951 | 16654359 |
| growth of ananas comosus (l.) merr. at different levels of mineral nutrition under greenhouse and field conditions. i. plant and fruit weights and absorption of nitrate and potassium at different growth intervals. | | 1950 | 16654323 |
| pineapple plantations' prudential plan. | | 1950 | 15428097 |
| manganese interference in the absorption and translocation of radioactive iron (fe) in ananas comosus (l.) merr. | | 1950 | 16654292 |
| growth and chemical composition of ananas comosus (l.) merr., in solution cultures with different iron-manganese ratios. | | 1949 | 16654234 |
| the biosynthesis of auxin in the vegetative pineapple; the precursors of indoleacetic acid. | | 1949 | 18108931 |
| the biosynthesis of auxin in the vegetative pineapple; nature of the active auxin. | | 1949 | 18108930 |
| flower formation in the pineapple plant by geotropic stimulation. | | 1948 | 18875244 |
| [confirmation of a woodborer as a pest of pineapple]. | | 1948 | 18099936 |
| note on flower formation in the pineapple induced by low night temperatures. | | 1948 | 16654160 |
| diurnal changes and growth rates as associated with ascorbic acid, titratable acidity, carbohydrate and nitrogenous fractions in the leaves of ananas comosus (l.) merr. | | 1948 | 16654147 |
| chimeras in the pineapple; colchicine-induced tetraploids and diploid-tetraploids in the cayenne variety. | | 1947 | 18902547 |
| free and bound auxin in the vegetative pineapple plant. | | 1947 | 20252516 |
| effects of nitrogen on chlorophyll, acidity, ascorbic acid, and carbohydrate fractions of ananas comosus (l.) merr. | | 1947 | 16654093 |
| chlorophyll and protein interrelationships in ananas comosus (l.) merr. | | 1947 | 16654087 |
| effects of nitrogen on the nitrogenous fractions of ananas comosus (l.) merr. | | 1947 | 16654085 |
| effects of nitrogen on growth and ash constituents of ananas comosus (l.) merr. | | 1946 | 16654042 |
| inheritance of three leaf types in the pineapple. | | 1946 | 20985732 |
| effects of potassium on the nitrogenous constituents of ananas comosus (l.) merr. | | 1946 | 16654038 |
| studies on vitamin content of canned pineapple. | | 2016 | 21025058 |
| effects of iron on certain nitrogenous fractions of ananas comosus (l.) merr. | | 1946 | 16654029 |
| flower formation in the pineapple plant as controlled by 2,4-d and naphthaleneacetic acid. | | 1945 | 17818200 |
| methyl bromide for control of the pineapple mealybug. | | 1945 | 21008240 |
| effects of potassium on chlorophyll, acidity, ascorbic acid, and carbohydrates of ananas comosus (l.) merr. | | 1945 | 16654014 |
| effects of different amounts of potassium on growth and ash constituents of ananas comosus (l.) merr. | | 1945 | 16654011 |
| effects of iron on chlorophyllous pigments, ascorbic acid, acidity and carbohydrates of ananas comosus (l.) merr., supplied with nitrate or ammonium salts. | | 1944 | 16653903 |
| effects of iron on the growth and ash constituents of ananas comosus (l.) merr. | | 1943 | 16653879 |
| distribution of nitrogenous and carbohydrate fractions and other substances in exposed and covered pineapple sister shoots. | | 1940 | 16653627 |
| anthelmintic inactivity of fresh pineapple juice in vivo. | | 1940 | 17831178 |
| anthelmintic activity of fresh pineapple juice. | | 1939 | 17809477 |
| distribution of different nitrogen fractions, sugars and other substances in various sections of the pineapple plant grown in soil cultures and receiving either ammonium or nitrate salts. | | 1939 | 16653552 |
| assimilation of ammonium and nitrate by pineapple plants grown in nutrient solutions and its effects on nitrogenous and carbohydrate constitutents. | | 1938 | 16653506 |
| relationship between nitrogen fertilization and chlorophyll content in pineapple plants. | | 1935 | 16653256 |
| certain physicochemical properties of pineapple stem colloids. | | 1928 | 16652573 |
| on the proteolytic action of bromelin, the ferment of pineapple juice. | | 1893 | 16992096 |