Dichlorodiphenyldichloroethane (DDD) is an organochlorine insecticide that is slightly irritating to the skin.[1] DDD is a metabolite of DDT.[2] DDD is colorless and crystalline;[3] it is closely related chemically and is similar in properties to DDT, but it is considered to be less toxic to animals than DDT.[4] The molecular formula for DDD is (ClC6H4)2CHCHCl2 or C14H10Cl4, whereas the formula for DDT is (ClC6H4)2CHCCl3 or C14H9Cl5. DDD is in the Group B2 classification, meaning that it is a probable human carcinogen. This is based on an increased incidence of lung tumors in male and female mice, liver tumors in male mice, and thyroid tumors in male rats. Further basis is that DDD is so similar to and is a metabolite of DDT, another probable human carcinogen.[2] DDD is no longer registered for agricultural use in the United States, but the general population continues to be exposed to it due to its long persistence time. The primary source of exposure is oral ingestion of food.[5] 1946 is the ...
Ethylene (ET) is metabolized to the mutagenic and carcinogenic ethylene oxide (EO). ET however, was neither mutagenic nor carcinogenic in classical tests. In order to estimate its carcinogenic risk based on EO data, a physiological toxicokinetic (PT) model is required. Because important toxicokinetic data are missing, the toxicokinetics of the EO formation from ET, mediated by the cytochrome P450-dependent monooxygenase CYP2E1, were investigated in subcellular fractions of livers from B6C3F1 mice, F344 rats, and human donors or of lungs from mice and rats. Suicide inhibition of CYP2E1 by ET was quantified using a new kinetic procedure. Also quantitatively investigated was the relevance of epoxide hydrolase and glutathione S-transferase on the metabolic elimination of EO. The obtained toxicokinetic parameters will be used to validate the PT model for ET and EO. « ...
It is easy to find the workers you need to make your business excel when you search through the online classifieds on Gumtree to view the CVs of sales and telemarketing professionals seeking work in Kwazulu Natal.
Six years into South Africas fledgling democracy one is prompted to ask: what has been achieved, if anything? In this paper, I will attempt to provid...
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Strategic Analytics & Management (SAM) is a Sub-recipient partner of the Adolescent Girls and Young Women (AGYW) Program in Umhlatuze District in Kwa-Zulu Natal. SAM seeks to appoint a Finance Manager (AGYW Program) to based in Richards Bay.
DDT, DDE, and DDD was once widely used to control insects on agricultural crops and insects that carry diseases like malaria and typhus, but is now used in only a few countries to control malaria. Technical-grade DDT is a mixture of three forms, p,p-DDT (85%), o,p-DDT (15%), and o,o-DDT (trace amounts). All of these are white, crystalline, tasteless, and almost odorless solids. Technical grade DDT may also contain DDE (1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene) and DDD (1,1-dichloro-2,2-bis(p-chlorophenyl)ethane) as contaminants. DDD was also used to kill pests, but to a far lesser extent than DDT. One form of DDD (o,p-DDD) has been used medically to treat cancer of the adrenal gland. Both DDE and DDD are breakdown products of DDT.
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Authors retain copyright and grant Rangifer irrevocable and non-exclusive right of publication with the work simultaneously licensed under a Creative Commons Attribution License (CC-BY). This means, among other things, that anyone is free to copy and distribute the content, as long as they give proper credit to the author(s) and the journal. For further information, see Creative Commons website for human readable or lawyer readable versions. ...
Phenol, 2,3,4-trichloro-6-[(2,3,5-trichloro-6-hydroxyphenyl)methyl]- | C13H6Cl6O2 | CID 74742 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
Acetic acid, ((p-chlorophenyl)sulfonyl)-, compd. with 2,2,2-nitrilotris(ethanol) (1:1) | C14H22ClNO7S | CID 55679 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
2033-69-4 - JWKLKVSBAUXWEZ-UHFFFAOYSA-N - Piperazine, 1-(p-chlorophenyl)-4-(4-(o-tolyloxy)butyl)- - Similar structures search, synonyms, formulas, resource links, and other chemical information.
4-(p-Chlorophenyl)-1-(p-tolylsulfonyl)piperidine-4-carboxylic acid/ACM84254988 can be provided in Alfa Chemistry. We are dedicated to provide our customers the best products and services.
REQUIREMENTS: MBCHB degree or equivalent qualification plus Certificate of registration with Health Professions Council of South Africa (HPCSA) as a Medical Practitioner. Proof of current registration as a Medical Practitioner with HPCSA. Experience: Grade 1: No experience required. The appointment to grade 1 requires 1 year relevant experience after registration as a Medical Practitioner with a recognized foreign health professional council in respect of foreign qualified employees, of whom it is not required to perform Community Service, as required in South Africa. Grade 2: 5 years appropriate experience as a Medical Practitioner after registration with HPCSA as a Medical Practitioner. The appointment to Grade 2 requires a minimum of six years (6) relevant experience after registration as a Medical Practitioner with a recognized Foreign Health Professional Council in respect of foreign qualified employees, of whom it is not required to perform Community Service, as required in South Africa. ...
REQUIREMENTS : Professional Nurse Grade 1: Minimum Appointment Requirements: Basic R425 qualification (i.e. Diploma/ Degree in Nursing) that allows registration with the South African Nursing Council (SANC) as a Professional Nurse. A post basic qualification in Advanced Midwifery and Neonatal Nursing Science, with duration of at least 1 year, accredited with the SANC Certificates of Registration with the SANC (General Nursing and relevant post basic qualification) Proof of current registration with the SANC (2020) Experience: A minimum of 4 years appropriate/ recognizable experience in nursing after registration as a Professional Nurse with the SANC in General Nursing. Requirements: Professional Nurse Grade 2: Basic R425 qualification (i.e. Diploma/ Degree in Nursing) that allows registration with the South African Nursing Council (SANC) as a Professional Nurse. A post basic qualification in Advanced Midwifery and Neonatal Nursing Science, with duration of at least 1 year, accredited with ...
This data report provides a compilation of information developed over the last 6+ years by a multi-disciplinary, multi-institutional research team. The overall goal of this work has been to identify the biological, chemical, and physical factors that control rates of reductive dechlorination of DDE and DDMU in sediments of the Palos Verdes Shelf (.... Eganhouse, Robert P.; Pontolillo, James; Orem, William H.; Webster, Daniel M.; Hackley, Paul C.; Edwards, Brian D.; Rosenberger, Kurt; Dickhudt, Patrick; Sherwood, Christopher R.; Reinhard, Martin; Qin, Sujie; Dougherty, Jennifer; Hopkins, Gary; Marshall, Ian; Spormann, Alfred ...
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Cumulative overview of all DDD alterations performed in the period 1982-2017. The year changed is when the alterations were implemented in the ATC/DDD Index. Please note that a DDD may have changed more than once for some ATC codes. The ATC codes are current codes. For substances where the DDD is changed twice the new DDD which is not according to current value is marked with an asterix ...
Cumulative overview of all DDD alterations performed in the period 1982-2017. The year changed is when the alterations were implemented in the ATC/DDD Index. Please note that a DDD may have changed more than once for some ATC codes. The ATC codes are current codes. For substances where the DDD is changed twice the new DDD which is not according to current value is marked with an asterix ...
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Looking for online definition of o,p-DDD in the Medical Dictionary? o,p-DDD explanation free. What is o,p-DDD? Meaning of o,p-DDD medical term. What does o,p-DDD mean?
2,2,2-Trichloro-1-(1-methyl-1H-pyrrol-2-yl)-1-ethanone chemical properties, What are the chemical properties of 2,2,2-Trichloro-1-(1-methyl-1H-pyrrol-2-yl)-1-ethanone 21898-65-7, What are the physical properties of 2,2,2-Trichloro-1-(1-methyl-1H-pyrrol-2-yl)-1-ethanone ect.
23904-87-2 - KBNOGJIHESRQCG-UHFFFAOYSA-N - Ketone, beta-(p-chlorophenyl)phenethyl 4-(o-tolyl)piperazinyl - Similar structures search, synonyms, formulas, resource links, and other chemical information.
The Joint United Nations Program on HIV/AIDS and the World Health Organization estimate that nearly half of the 33.4 million people living with HIV/AIDS in the world are women [1]. In sub-Saharan Africa, women account for 59% of all infected adults, and HIV-positive women aged 15 to 24 years outnumber their male peers by three to one, representing 76% of the total cases in that age group [2, 3]. These figures highlight the vulnerability of women, particularly young women, to becoming infected with HIV in sub-Saharan Africa.. In addition to biological factors [4-6] that make women more vulnerable than men to acquiring HIV during sex, certain sexual behavior patterns place young women at high risk, including partnering with older men who are more likely to be infected [7], multiple concurrent relationships [8], low marriage rates [9], low consistent condom use rates [10, 11], and limited skills in negotiating safer sex practices. Gender-based violence increases vulnerability [12], and poverty ...
There are many place names containing the element chad or something similar. In many cases, reference to the early forms of the name suggests that the derivation is not from the name Chad, but from some other word. It is possible that even where a name might reasonably be thought to derive from Chad that the individual is some other of the same name. Hence great caution needs to be exercised in explaining ancient toponyms by reference to St Chad. That being said, a township located outside Ladysmith, Kwa-Zulu Natal is named St. Chads after an Anglican Mission in the area.[21]. One toponym with a good claim to derivation from the saints name is Chadkirk Chapel in Romiley, Greater Manchester, which dates back to the 14th century - although the site is much older, possibly dating back to the 7th century when it is believed St Chad visited to bless the well there. Cameron[22] points out that -kirk toponyms more frequently incorporate the name of the dedicatee, rather than the patron, so there is ...
This page contains information on the chemical 2-Pyridinecarboxylic Acid, 4-Amino-3,5,6-Trichloro-, Isooctyl Ester including: 7 synonyms/identifiers.
1-fluoro-4-(2,3,3-trichloro-1-cyclopropen-1-yl)benzene - chemical structural formula, chemical names, chemical properties, synthesis references
Kevin Mc Nally is the Director of US Amines Ltd. The African Amines production plant is located in Newcastle South Africa with administrative offices in Umhlanga, KwaZulu Natal.. The plant specialises in the production of the highest quality Methyl Amines.. ...
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1. In rats poisoned with DDT there is an increase in the total metabolic rate.. 2. The increased metabolic rate is reflected in an increase in food and water intake and a slight loss in body weight.. 3. The oxygen uptake of liver slices from DDT poisoned rats is increased.. 4. In advanced DDT poisoning, slices taken from parts of the liver showing gross abnormalities have instead of an increased oxygen uptake a reduction below the control values.. 5. The oxygen consumption of sartorius muscles from frogs poisoned with DDT is increased.. 6. A significant increase in the respiration of the brain tissue has not been demonstrated.. 7. A known metabolite of DDT, di(p-chlorophenyl) acetic acid has been shown not to be responsible for the characteristic actions of DDT.. ...
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Product Number: C2268 CAS number: 104215-84-1 Synonyms: [13C12]-1,1,1-Trichloro-2,2-bis(4-chlorophenyl)ethane, [13C12]-1,1-Bis(4-chlorophenyl)-2,2,2-trichloroethane. ...
Other names: Diethyl 3,5,6-trichloro-2-pyridyl phosphate; Dursban oxygen analog; Dursban O-analog; Dursbanoxon; Phospyrat ethyl; 3,5,6-Trichloro-2-pyridyl diethyl phosphate; Chloropyrifos oxon; Chlorpyrifos oxon; Chloropyrifos oxygen analog; Fospirate-ethyl; Phosphoric acid, diethyl 3,5,6-trichloro-2-pyridinyl ester; O,O-Diethyl O-3,5,6-trichloro-2-pyridyl phosphate; 3,5,6-Trichloro-2-pyridyl diethylphosphate (chlorpyrifos oxon ...
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National Study to Determine Levels of Chlorinated Hydrocarbon Insecticides in Human Milk: 1975-1976 and Supplementary Report to the National Human Milk Study: 1975-1976 ...
dichlorodiphenyltrichloroethane is understood for its pre-judicious result on the setting and life. However, the new kind was found to be more practical against insects and in smaller amounts, probably minimizing its environmental impact.. In continued to explore the crystal structure of insecticde, the researchers began learning fluorinated varieties of dichlorodiphenyltrichloroethane, swapping out atomic number 17 atoms for halogen.. They ready 2 solid varieties of the compound a mono fluoro and a difluoro analog and tested them on fruit flies and mosquitoes, as well as dipterous insect species that carry protozoal infection, black vomit, Dengue, and Zika.. The solid varieties of fluorinated dichlorodiphenyltrichloroethane killed insects a lot of quickly than did DDT; the difluoro analog, referred to as DFDT, killed mosquitoes 2 to fourfold quicker, the researchers aforesaid.. Speed thwarts the event of resistance, aforesaid NYU chemistry faculty member archangel Ward, a senior author on the ...
In order to assess the trend in the body load of organochlorine pesticide residues in Great Britain, between July 1965 and June 1967 samples of fat were taken during routine necropsies on 247 subjects over 3 years old and on 44 stillborn or premature babies and infants below the age of 3. The levels of the three main pesticides, B.H.C., dieldrin, and D.D.T., were lower than those found in an earlier survey carried out in 1963 and 1964. No marked differences were observed in levels throughout Britain, but the levels in man were higher than those in women. Britain compares favourably with other countries in which similar surveys have been done.. ...
A Hydrogenomonas cleaved one of the rings of p,p-dichlorodiphenylmethane, a product of DDT metabolism, to yield p-chlorophenylacetate and further metabolized the latter compound. Products of microbial degradation of other diphenylmethanes were also identified. Substituents on the methylene-carbon and para-chloro substitution are critical factors governing resistance of DDT and related compounds to aerobic metabolism and decomposition by the bacterium. ...
Books and Book Chapters. Ågren, Maria. 2017. The State as Master: Gender, State Formation and Commercialisation in Urban Sweden, 1650-1780. Manchester: Manchester University Press. http://www.manchesteruniversitypress.co.uk/9781526100641. Appelbaum, Robert. 2017. The Aesthetics of Violence. Art, Fiction, Drama and Film. Rowman & Littlefield International. http://www.rowmaninternational.com/book/the_aesthetics_of_violence/3-156-5303cf4d-bb0b-499d-8d38-e3506416991d. Ballantine, Christopher, Michael Chapman, Kira Erwin and Gerhard Maré. Eds. 2017. Living Together, Living apart? Social Cohesion in a Future South Africa. University of Kwa-Zulu Natal Press. http://www.ukznpress.co.za/?class=bb_ukzn_books&method=view_books&global%5Bfields%5D%5B_id%5D=496. Carruthers, Jane. 2017. National Park Science. Cambridge University Press. https://doi.org/10.1017/9781108123471. Conradie, Ernst M. 2017. Redeeming Sin?: Social Diagnostics amid Ecological Destruction (Religious Ethics and Environmental ...
This page contains information on the chemical Phenol, 2,2\-methylenebis(3,4,6-trichloro-, sodium salt including: 2 synonyms/identifiers.
Recent analysis of drinking water in South Africa found the presence of ARVs, other pharmaceutical and personal care products. The environmental and human health risk that this presents is daunting. The increased use of ARVs with poor disposal practices could be the reason for these substances being present in drinking water. Therefore, this study aimed to determine the knowledge and practices of HIV infected patients, regarding medicine disposal. A descriptive, cross sectional, quantitative study that utilised a structured, self-administered, questionnaire was undertaken at 3 different public ARV clinics in the eThekwini Metro of KwaZulu Natal, SA. The variables included questions on demographics, knowledge and practices of medicine disposal of ARV and other medications. Data was captured using excel spreadsheets and analysed using SPSS version 25. Chi square tests were used to compare factors between correct and incorrect knowledge and practice groups. Four hundred and eighty four participants agreed
How to Train a Cat. Cats are incredibly independent creatures. In fact, researchers have found that even though humans have kept cats as pets for at least 9,000 years, house cats are only semi-domesticated.http://www.independent.co.uk/ne...
Unit 3 Chemistry: VCAA Practice Exam Questions 1 Question 3 (2010) A sample of the insecticide dichlorodiphenyltrichloroethane (DDT), C14H9Cl5, was found
Ethane is burned with 50% excess air. The percentage conversion of ethane is 90%. Of the ethane burned, 25% reacts to form CO and the balance reacts to form carbon dioxide. Calculate the molar composition of the stack gas on a.
An estimated 1.5 million metric tons of DDT were used between the 1940s and the 1970s, when strict restrictions were placed on the chemicals worldwide. Though the
Kirsten Weir has an excellent article in Salon on DDT and Rachel Carson. Weir took the time to talk to actual scientists and found:
Sigma-Aldrich offers Aldrich-267880, 1,2-Bis(chlorodimethylsilyl)ethane for your research needs. Find product specific information including CAS, MSDS, protocols and references.