Relative toxicity of the technical grade material, isomers, and formulations of endosulfan to the fishChanna punctata

1981 ◽  
Vol 27-27 (1) ◽  
pp. 239-243 ◽  
Author(s):  
A. Priyamvada Devi ◽  
D. M. R. Rato ◽  
K. S. Tilak ◽  
A. S. Murty
Keyword(s):  
Relative Toxicity ◽  
Technical Grade ◽  
Grade Material

scholarly journals An Overview of the Pesticides Industry and its Marketing Environment

1990 ◽  
Vol 15 (2) ◽  
pp. 23-34
Author(s):  
U K Srivastava ◽  
N T Patel
Keyword(s):  
Structural Change ◽  
Market Development ◽  
Development Effort ◽  
Technical Grade ◽  
Product Mix ◽  
Marketing Environment ◽  
Major Market ◽  
Grade Material

The pesticides industry has grown by 7.6 per cent during the last 20 years. It has also undergone a structural change from low value products to high value products. The major constituents of this industry are technical grade material manufacturers, formulators, and dealers. In this article, U K Srivastava and N T Patel analyse the growth of the pesticides industry, the changes in the product mix, the problems of the constituents, and the marketing scenario. According to them, there is vast scope for accelerating pesticides consumption by diversifying to hitherto untapped regions and crops. This, however, calls for a major market development effort on the part of the industry.

Chromatographic Methods for Analysis of Some Fluorene-9-Carboxylic Acid Derivatives (Morphactins) in Emulsifiable Concentrates and Technical Material

1977 ◽  
Vol 60 (3) ◽  
pp. 728-736
Author(s):  
William P Cochrane ◽  
Joginder Singh ◽  
Ralph Grant
Keyword(s):  
Correlation Coefficients ◽  
Gas Liquid Chromatography ◽  
Good Resolution ◽  
Technical Grade ◽  
Mass Spectral Analysis ◽  
Ultraviolet Detection ◽  
Mass Spectral ◽  
Flame Ionization ◽  
Technical Material ◽  
Grade Material

Abstract Flurenol-methyl, chloroflurenol-methyl, and dichloroflurenol-methyl in emulsifiable concentrates and technical grade material are separated and identified by thin layer (TLC), high pressure liquid (HPLC), and gas-liquid chromatography (GLC). TLC results were unsatisfactory because of interferences and also variations in the quantitation of the active ingredients. HPLC and GLC gave satisfactory results. Both Porasil C400 and Corasil II HPLC columns gave good resolution of the 3 homologs, with ultraviolet detection at 254 nm. Standard curves had correlation coefficients of 0.990 or better. Analysis by GLC was quantitative with flame ionization detection and a 5% DC-200 column. Response was linear from 200 ng to 2 μg and the coefficient of variation was 2.4%. The mass spectral analysis of the formulated product is also discussed.

scholarly journals Reducing Superficial Scald of Apples and Pear with Naturally Occurring Triterpenoid Compounds

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 792B-792
Author(s):  
Eric A. Curry
Keyword(s):  
Skin Disorder ◽  
Epithelial Tissue ◽  
Controlled Atmosphere ◽  
Limited Extent ◽  
Technical Grade ◽  
Superficial Scald ◽  
Naturally Occurring ◽  
Grade Material ◽  
Fruit Surface ◽  
Dark Room

Superficial scald is a physiological skin disorder of apples and pears that develops in cold storage and that often increases in severity after the fruit is removed. It is thought to be associated with the accumulation of farnesene in the epithelial tissue. Currently used methods of controlling scald are diphenylamine (DPA) drenches, and controlled atmosphere (CA) to a limited extent. In order to expand the methods available to control scald, we have been investigating the potential of a number of naturally occurring compounds applied to the fruit surface by drenching or by topical application. Fruit were treated either by wiping the fruit surface with technical-grade material and then removing the excess, drenching whole fruit in aqueous emulsions, or drenching fruit in combinations of heat plus emulsion. After treatment, the fruit was air-dried for 30 min and then placed either in regular or CA storage for 6 months, after which time they were placed in a dark room at 68F for 7 days. Scald was evaluated and fruit condition assessed. Results from 3 years indicate farnesene and squalene reduce scald in apples and pears.

Determination of Ancymidol in Formulations and Technical Material

1975 ◽  
Vol 58 (4) ◽  
pp. 850-851
Author(s):  
Richard Frank ◽  
Joe T Wilson
Keyword(s):  
Gas Chromatograph ◽  
Ionization Detector ◽  
Technical Grade ◽  
Liquid Chromatograph ◽  
Florisil Column ◽  
Flame Ionization ◽  
Florisil Column Chromatography ◽  
Technical Material ◽  
Grade Material

Abstract A method for the determination of the plant growth regulator ancymidol (α-cyclopropyl-α-(4-methoxyphenyl)-5-pyrimidinemethanol) in formulations and technical grade material is presented. Technical grade material or the 4.5% emulsifiable concentrate formulation is dissolved in chloroform and the ancymidol is measured, using a gas-liquid chromatograph equipped with a flame ionization detector. The 0.026% aqueous concentrate formulation is extracted with ethyl acetate and purified by Florisil column chromatography; the ancymidol is measured with a gas chromatograph. The recovery of ancymidol from a Florisil column averaged 100.1%.

Determination of the Herbicide Isopropalin in Technical Grade Material and in Formulations

1974 ◽  
Vol 57 (3) ◽  
pp. 645-647
Author(s):  
Oliver Dean Decker ◽  
Richard Frank
Keyword(s):  
Column Chromatography ◽  
Internal Standard ◽  
Gas Chromatograph ◽  
Ionization Detector ◽  
Technical Grade ◽  
Florisil Column ◽  
Flame Ionization ◽  
Florisil Column Chromatography ◽  
Grade Material

Abstract Two methods are described for the determination of isopropalin (2,6-dinitro-N,N-dipropylcumidine) in technical grade material (a concentrate in xylene) and emulsifiable concentrate formulations. Samples measured spectrophotometrically are purified by Florisil column chromatography. Samples measured gas chromatographically are dissolved in chloroform, mixed with the internal standard, and then injected into a gas chromatograph equipped with a flame ionization detector.

PENGGUNAAN MODEL KOOPERATIF TIPE TEAM GAMES TOURNAMENT UNTUK MENINGKATKAN KEMAMPUAN SISWA SEKOLAH DASAR

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Muhammad Noor
Keyword(s):  
Problem Solving ◽  
Sampling Technique ◽  
Control Group ◽  
Control Group Design ◽  
Team Games ◽  
Conventional Models ◽  
Grade Material ◽  
Normalized Gain ◽  
Cooperative Models ◽  
Better Than

The purpose of this study was to obtain empirical evidence about the use of cooperative models of Team Games Tournament to increase the ability of students on solving problems with the summation material fractions. To achieve these objectives, the research carried out in the form of an experiment by comparing the problem solving ability of students to the material sum of fractions through the use cooperative model of TGT and students who received conventional learning. The design is a pretest-posttest control group design. The sampling technique used is purposive sampling technique. The instrument used is to use tests that pretest and posttest. The data were analyzed quantitatively for the results of the pretest, posttest, and normalized gain value. Based on data analysis in this study we concluded that there are differences in problem solving ability of students to the material sum of fractions through the use of cooperative models of Team Games Tournament with students who studied with conventional models, and improved problem solving abilities of students in the material that follows the fractional summation cooperative learning of TGT better than students who take the conventional learning model. Therefore, the ability of solving problems of students at grade material fractions summation cooperative modeled of TGT has increased quite good.

Analisis Soal Matematika Tipe Higher Order Thinking Skills (HOTS) Tingkat SMP

2020 ◽  
Vol 2 (2) ◽  
pp. 112-129
Author(s):  
Lelly Oktafiana ◽  
Iis Holisin ◽  
Himmatul Mursyidah
Keyword(s):  
Power Level ◽  
Thinking Skills ◽  
Higher Order Thinking Skills ◽  
National Examination ◽  
Class Viii ◽  
Valid Test ◽  
Grade Material ◽  
Data Collection Technique ◽  
High Level

This study aims to describe the quality of the 2018 Mathematics National Examination (UN) in the HOTS types at the junior high level in terms of the level of validity, reliability, problem differentiation power, level of difficulty and distractor. This type of research is a descriptive study. The research was conducted at SMP Muhammadiyah 4 Surabaya and SMP Negeri 13 Surabaya for students in class VIII. The data collection technique used is a test. The test was taken from the 2018 math UN questions in odd semester VIII grade material including HOTS type. The number of UN mathematics questions in 2018 in the odd semester VIII class material consisted of 12 questions with 25% including LOTS types and 75% including HOTS types. The results showed: (1) 100% valid test questions, (2) high question reliability, (3) good problem differentiation power, (4) the difficuly level of the question 77,77% categorized as moderate and 2 question 22,23% are categorized as difficult, (5) there are 2 questions with one of the answer options do not work.

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