scholarly journals CHEMICAL ANALYSIS OF CEMENT HYDRATES IN CONCRETE AFTER LONG-TERM EXPOSURE AND IT’S CARBONATION MECHANISM

2015 ◽  
Vol 69 (1) ◽  
pp. 257-263
Author(s):  
Daisuke TAKAICHI ◽  
Toshiyuki SUDO ◽  
Tsuyoshi SAITO ◽  
Tatsuhiko SAEKI
Keyword(s):  
Chemical Analysis

scholarly journals Glycemic Control Potential of Chemically Characterized Extract from Withania frutescens L. Roots in Severe Diabetes-Induced Mice

2021 ◽  
Vol 11 (9) ◽  
pp. 3998
Author(s):  
Abdelfattah El Moussaoui ◽  
Hamza Mechchate ◽  
Mohammed Bourhia ◽  
Imane Es-safi ◽  
Ahmad Mohammad Salamatullah ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Plant Extract ◽  
Biochemical Parameters ◽  
Pharmaceutical Drugs ◽  
Glucose Lowering ◽  
Natural Agents ◽  
Severe Diabetes ◽  
Treatment Of Diabetes ◽  
Different Doses

Diabetes mellitus is a metabolic syndrome that causes impairment, mortality, and many other complications. Insulin and several synthetic medications are currently used in the treatment of diabetes. However, these pharmaceutical drugs are costly, and therefore medicines place priority on alternatives to fight this lethal disease. This modest study aims to investigate the chemical composition, antidiabetic and antihyperglycemic potentials along with subacute toxicity (bodyweight change and biochemical parameters) of hydroethanol extract from Withania frutescens L. roots (WFRE). The chemical analysis was carried out using GC–MS after extract silylation. The chemical analysis identified many potentially active compounds that may determine the antidiabetic results of WFRE. The antidiabetic effect of WFRE was evaluated in mice with severe diabetes using oral administration of doses up to 400 mg/kg for 28 days. The results of the antidiabetic and antihyperglycemic tests indicate that WFRE possesses promising glucose-lowering effects and, as a result, it may serve as an antidiabetic alternative for long-term use. The 4-week treatments with different doses of plant extract did not alter the bodyweight appearance of the diabetic mice nor their biochemical parameters (AST and ALT). The findings obtained indicate that the studied plant extract controlled severe diabetes in mice. Therefore, Withania frutescens L. can serve society as it provides natural agents to control diabetes.

scholarly journals Toxicity and bioaccumulation of fluoride ion on Branchiura sowerbyi, Beddard, (Oligochaeta, Tubificidae)

Zoosymposia ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 44-50 ◽  
Author(s):  
STEFANIA DEL PIERO ◽  
LUCIANO MASIERO ◽  
SANDRA CASELLATO
Keyword(s):  
Chemical Analysis ◽  
Aquatic Ecosystems ◽  
Pollution Assessment ◽  
Fluoride Ion ◽  
Seasonal Temperature ◽  
Temperature Changes ◽  
Branchiura Sowerbyi ◽  
Large Size ◽  
Different Temperatures

Fluoride concentrations are increasing significantly in many aquatic ecosystems as a consequence of human activities (agrochemicals, pharmaceuticals, refrigerants, pesticides, surfactant compounds). Several investigations have revealed that sensitivity to fluorides and safe concentrations vary greatly within classes, families and genera. Aquatic oligochaetes have often been used for pollution assessment and accumulation testing, but no information has been given about tolerance to fluoride ion. Among endobenthic tubificids Branchiura sowerbyi is easily identifiable (evident posterior gills, large size) and particularly useful for tissue requirements in chemical analysis. The purpose of this study was to examine the tolerance of this tubificid to fluoride ion and its bioaccumulation capacity by performing short (LC50 96h) and long-term (18 day) experiments at different temperatures (17°C and 22 °C). LC50 values (91.3 and 61.7 mg/L for 17°C and 22°C respectively), especially in the presence of sediment (267.6 and 80.1 mg/L for 17°C and 22°C respectively) showed that B. sowerbyi is more resistant to fluoride than other freshwater invertebrates. Fluoride became more toxic with increased temperature, demonstrating that seasonal temperature changes could influence the sensitivity of this freshwater tubificid. Bioaccumulation was lower when the organisms were exposed to sodium fluoride in the absence of sediment, indicating that this animal also accumulates fluoride by ingesting sediment. 

Revegetation Following Massive Application of Selected Herbicides

Weed Science ◽  
1973 ◽  
Vol 21 (5) ◽  
pp. 409-412 ◽  
Author(s):  
A. R. Isensee ◽  
W. C. Shaw ◽  
W. A. Gentner ◽  
C. R. Swanson ◽  
B. C. Turner ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Chemical Analysis ◽  
Sodium Arsenite ◽  
Sodium Chlorate ◽  
Mechanical Methods ◽  
Untreated Check ◽  
Dichlorophenoxy Acetic Acid ◽  
Residual Control ◽  
Term Response

This investigation was initiated in 1954 at Beltsville, Maryland, to determine the initial and long-term response of vegetation to, and persistence of, massive quantities of herbicides. Vegetative responses were determined 1, 2, 3, and 15 years after treatment. Residual phytotoxicity and herbicide residues were determined 14 years after treatment with bioassay and chemical analysis. After 3 years, revegetation was nearly complete in plots treated with massive (up to 400 times recommended agricultural rates) quantities of fenuron (1,1-dimethyl-3-phenylurea), monuron [3-(p-chlorophenyl)-1,1-dimethylurea], dalapon (2,2-dichloropropionic acid), chlorpropham (isopropyl m-chlorocarbanilate), sodium chlorate, 2,4-D [(2,4-dichlorophenoxy)acetic acid], borax, sodium chlorate plus borax, and 2,4-D plus borax. Only diuron [3-(3,4-di chlorophenyl)-1,1-dimethylurea], DMU [3-(3,4-dichlorophenyl)-1-methylurea] sodium arsenite, and sodium arsenite plus sodium chlorate gave residual control of vegetation for more than 3 years. Revegetated plots were identical to untreated check plots whether the vegetation was initially killed by chemical or mechanical methods. Phytotoxic soil residues of DMU, diuron, and arsenate were present 14 years after application.

Theoretical Investigation of Tip-Based Nanoscale Infrared Spectroscopy

2009 ◽  
Author(s):  
William Dipippo ◽  
Bong Jae Lee ◽  
Keunhan Park
Keyword(s):  
Ir Spectroscopy ◽  
Chemical Analysis ◽  
Chemical Information ◽  
Full Spectrum ◽  
Force Microscopy ◽  
Chemical Force Microscopy ◽  
Atomic Force ◽  
Ft Ir ◽  
Tip Enhanced Raman Spectroscopy

The ability to conduct the chemical analysis of materials with the nanoscale spatial resolution has been a long term thrust in many science and engineering communities. Although several techniques such as chemical force microscopy [1] and tip-enhanced Raman spectroscopy [2] have been developed for the nanoscale chemical analysis, there still exist technical challenges in routinely achieving a full spectrum of chemical information at the nanoscale. The main objective of this study is to propose a novel tip-based nanoscale infrared (IR) spectroscopy by combining the atomic force microscopy (AFM) and the Fourier-transformed infrared (FT-IR) spectroscopy.

Chemical analysis of Greek royal jelly - Its influence of the long-term administration on spatial memory in aged rats

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
J Pyrzanowska ◽  
A Piechal ◽  
K Blecharz-Klin ◽  
K Graikou ◽  
E Widy-Tyszkiewicz ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Spatial Memory ◽  
Royal Jelly ◽  
Aged Rats ◽  
Term Administration

scholarly journals Long-term hydrolytically stable bond formation for future membrane-based deep ocean microfluidic chemical sensors

Lab on a Chip ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1287-1295 ◽  
Author(s):  
M. Tweedie ◽  
D. Sun ◽  
B. Ward ◽  
P. D. Maguire
Keyword(s):  
Chemical Analysis ◽  
Chemical Sensors ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Bond Formation ◽  
Deep Ocean ◽  
Two Fluid

Future ocean profiling of dissolved inorganic carbon and other analytes will require miniaturised chemical analysis systems based on sealed gas membranes between two fluid channels.

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