Regulation of Movement of Assimilate Into Ovules of Pisum sativum Cv. Greenfeast: a 'remote' Effect of the Pod.

1978 ◽  
Vol 5 (3) ◽  
pp. 295 ◽  
Author(s):  
AM Williams ◽  
RR Williams
Keyword(s):  
Pisum Sativum ◽  
Soluble Sugars ◽  
Single Leaf ◽  
Localized Heating ◽  
Low Levels ◽  
Response To Temperature

14CO2 was fed to the single leaf of pea plants (P. sativum cv. Greenfeast) pruned to leave one leaf and one pod. Localized heating of the pod, removal of ovules and determination of 14C activity in soluble sugars and starch fractions were used to investigate the enhanced movement of 14C from the leaf into the ovules at higher pod temperatures. The low levels of 14C detected in the starch fractions indicate that conversion of soluble sugars to starch is not involved in the response to temperature. The response was similar with only localized heating of the pod and with the ovules removed; therefore, it must be independent of the ovules. It is proposed that the pod tissue produces a stimulus which has a 'remote' effect on export of assimilates from the leaf.

Spectrophotometric Determination of Raceophenidol in Feed at Very Low Levels

1968 ◽  
Vol 51 (4) ◽  
pp. 752-755
Author(s):  
Edward L Pratt ◽  
Morris E Auerbach
Keyword(s):  
Spectrophotometric Determination ◽  
Growth Promotion ◽  
Ultraviolet Spectrum ◽  
Average Value ◽  
Collaborative Studies ◽  
Low Levels ◽  
Concentration Levels

Abstract Raceophenidol in feed at concentration levels intended for growth promotion of poultry can be estimated by a curvature inversion measurement related to the ultraviolet spectrum of derived p-methylsulfonylbenzaldehyde. The drug can be accurately measured at the 0.0005% level. Collaborative studies on the method showed an average value of 94 ± 10% of claim. The method is recommended for adoption as official, first action.

scholarly journals Quantitative Determination of the Effects of He-Ne Laser Irradiation on Seed Thermodynamics, Germination Attributes and Metabolites of Safflower (Carthamus tinctorius L.) in Relation with the Activities of Germination Enzymes

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1411
Author(s):  
Rashida Perveen ◽  
Xiukang Wang ◽  
Yasir Jamil ◽  
Qasim Ali ◽  
Shafaqat Ali ◽  
...  
Keyword(s):  
Seed Germination ◽  
Energy Levels ◽  
Soluble Sugars ◽  
Building Blocks ◽  
Carthamus Tinctorius ◽  
Fast Decline ◽  
Seed Irradiation ◽  
Seed Reserves ◽  
Positive Correlations

The present investigation was undertaken to assess the effects of different doses (100, 300, and 500 mJ) of low power He–Ne laser (632.8 nm) irradiation on seed germination and thermodynamics attributes and activities of potential germinating enzymes in relation with changes in seed metabolites. He–Ne laser seed irradiation increased the amylase (Amy), protease (Pro) and glucosidase (Gluco) activities, with a significant improvement in seed thermodynamics and seed germination attributes. A fast increase was found in free fatty acids (FFA), free amino acids (FAA), chlorophyll (Chl), carotenoids (Car), total soluble sugars (TSS) and reducing sugars (RS) in laser treated seeds in parallel with fast decline in seed oil contents and total soluble proteins (TSP). Significant positive correlations were recorded in laser-induced enhanced seed energy levels, germination, activities of germination enzymes with levels of FAA, FFA, Chl, TSS and RS, but a negative correlation with the levels of TSP and oil. In conclusion, the seed treatment with 100 and 300 mJ He–Ne laser was more effective to improve the seed germination potential associated with an improvement in seed energy levels due to increased activities of germination enzymes due to the speedy breakdown of seed reserves to simple metabolites as building blocks.

Metabolic response to temperature stress in the Colombian freshwater crab Neostrengeria macropa (H. Milne Edwards, 1853) (Decapoda: Brachyura: Pseudothelphusidae)

2021 ◽  
Author(s):  
David M Hudson
Keyword(s):  
Metabolic Response ◽  
Infrastructure Development ◽  
Predator Prey ◽  
Temperature Range ◽  
Indicator Group ◽  
Response To Temperature ◽  
Performance Results ◽  
The City ◽  
The Ideal

Abstract Freshwater crustaceans are distributed throughout the montane and lowland areas of Colombia, and are therefore a useful indicator group for how aquatic species will respond to climate change. As such, metabolic determination of physiological performance was evaluated for the Colombian pseudothelphusid crab, Neostrengeria macropa (H. Milne Edwards, 1853), over a temperature range inclusive of current temperatures and those predicted by future scenarios in the plateau around the city of Bogotá, namely from 8 °C to 30 °C. The performance results mostly aligned with previous exploratory behavioral determination of the ideal temperature range in the same species, although the metabolism increased at the highest temperature treatments, a point when exploratory behavior declined. These results indicate that this species of montane crab behaviorally compensates for increased thermal stress by decreasing its physical activity, which could have negative predator-prey consequences with changes to community structure as different species undergo climate-mediated geographic range shifts in the region. As this species is endemic to the plateau surrounding Bogotá, it also experiences a number of other stressors to its survival, including infrastructure development and invasive species.

Determination of low levels of bromide in fresh water after chromatographic enrichment

Talanta ◽  
1984 ◽  
Vol 31 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Ulla Lundström ◽  
Åke Olin ◽  
Folke Nydahl
Keyword(s):  
Fresh Water ◽  
Low Levels

Determination of Ochratoxin A in Feed by Immunoaffinity Cleanup and Liquid Chromatography

2013 ◽  
Vol 96 (3) ◽  
pp. 599-602 ◽  
Author(s):  
Ping Ding ◽  
Ziyou Mi ◽  
Yali Hou ◽  
Yigang He ◽  
Jianhua Xie
Keyword(s):  
Liquid Chromatography ◽  
Detection Limit ◽  
Ochratoxin A ◽  
Cyanogen Bromide ◽  
Polyclonal Antibodies ◽  
Immunoaffinity Column ◽  
Low Levels ◽  
Sepharose 4B ◽  
Feed Samples

Abstract A method using LC was developed for determination of ochratoxin A (OTA) in feeds. The extracted samples were cleaned up by an immunoaffinity column prepared by covalently coupling polyclonal antibodies against OTA to cyanogen bromide-activated Sepharose 4B. The eluates were determined by LC with fluorescence detection. Recoveries of OTA from fortified samples of 1–10 μg/kg levels ranged from 84.3 to 90.0%, with CVs of 3.3–7.8%. The detection limit was 0.045 μg/kg based on an S/N of 3:1. A total of 65 feed samples were screened for OTA with the proposed method. The results showed that only nine samples were contaminated with OTAs at low levels. The presented method was successfully applied to quantify OTAs in real feed samples.

STUDIES ON FOLIC ACID IN INFANCY

PEDIATRICS ◽  
1964 ◽  
Vol 33 (5) ◽  
pp. 694-699
Author(s):  
Yehuda Matoth ◽  
Rina Zamir ◽  
Shulamith Bar-Shani ◽  
Nathan Grossowicz
Keyword(s):  
Bone Marrow ◽  
Folic Acid ◽  
Folinic Acid ◽  
Whole Blood ◽  
Blood Picture ◽  
Normal Range ◽  
Acid Status ◽  
Effect Of Treatment ◽  
Low Levels

Folic acid was assayed microbiologically in whole blood in a group of infants hospitalized for diarrhea, various infections, and malnutrition. Folic acid activity was decreased in the majority of cases. In some of the infants very low levels were observed. The value of the determination of folic acid in whole blood as a sensitive index of the folic acid status of an individual was confirmed by parallel observations on bone marrow morphology and the level of folic acid in serum. Folinic acid levels were within the normal range in most cases. Low folinic acid levels were common only when folic acid was extremely low. Many patients with low folic acid levels were not anemic, or mildly anemic. In the anemic patients a hypochromic microcytic blood picture was the rule. The effect of treatment with folic acid on the general condition of the patients was more striking than the hematological response.

Determination of pea (Pisum sativum L.) root lectin using an enzyme-linked immunoassay

Planta ◽  
1984 ◽  
Vol 161 (4) ◽  
pp. 302-307 ◽  
Author(s):  
C. L. Díaz ◽  
P. Lems-van Kan ◽  
I. A. M. Van der Schaal ◽  
J. W. Kijne
Keyword(s):  
Pisum Sativum ◽  
Pisum Sativum L ◽  
Root Lectin
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