Results 101 to 110 of about 95,173 (266)

Mosquito Larvicidal Constituents from Lantana Viburnoides SP Viburnoides Var Kisi (A. rich) Verdc (Verbenaceae). [PDF]

open access: yes, 2008
\ud \ud Lantana viburnoides sp viburnoides var kisi is used in Tanzania ethnobotanically to repel mosquitoes as well as in traditional medicine for stomach ache relief.
Gikonyo, Nicholus K   +5 more
core  

Low multiplicity of infection in vivo results in purifying selection against baculovirus deletion mutants [PDF]

open access: yes
The in vivo fate of Autographa californica multiple nucleopolyhedrovirus deletion mutants originating from serial passage in cell culture was investigated by passaging a population enriched in these mutants in insect larvae.
Erro, E.   +4 more
core   +2 more sources

Joint effects of elevated copper and temperature in juvenile Tambaqui exposed in black and white waters of the Amazon

open access: yesJournal of Fish Biology, EarlyView.
Abstract This study aimed to investigate how exposure to elevated water temperature and metal concentration jointly affect the physiology of Amazonian fish. Aboard a research vessel in the Amazon, we evaluated the effects of water temperature (river T°C at 31.5°C and a + 4°C increase to 35.5°C) and of 3‐h copper (Cu) exposure (up to 600 μg/L) in ...
Anne Crémazy   +6 more
wiley   +1 more source

The use of essential oils for the control of Callosobruchus subinnotatus (Pic) in stored Vigna subterranea L.

open access: yesJulius-Kühn-Archiv, 2018
Studies were conducted in the Crop Science laboratory, University of Calabar to evaluate the insecticidal actions of essential oils (EOs) of Xylopia aethiopica, Dennetia tripetala, Pysostigma venenosum and Senna hirsuta in the management of ...
Umoetok, Sylvia Bassey   +2 more
doaj   +1 more source

Transcriptional cellular responses in midgut tissue of Aedes aegypti larvae following intoxication with Cry11Aa toxin from Bacillus thuringiensis. [PDF]

open access: yes, 2015
BackgroundAlthough much is known about the mechanism of action of Bacillus thuringiensis Cry toxins, the target tissue cellular responses to toxin activity is less understood.
Bravo, Alejandra   +4 more
core   +1 more source

Determination of LC50 of copper in Litopenaeus vannamei

open access: yes‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2007
We determined the LC50 of copper (as CUSO_4) and it's Maximum Allowable Concentration (MAC) for Litopenaeus vannamei. The study was performed in 2003 for which bioassays were used for acute toxicity tests in a period of 96 hours during which water parameters such as water temperature, pH, dissolved oxygen, hardness, alkalinity were also measured.
Ghorbani, R.   +3 more
openaire   +4 more sources

Bath Treatments With Emamectin Benzoate Control Dactylogyrideans Infecting Colossoma macropomum Gills Without Altering Physiology of This Host Fish

open access: yesJournal of Fish Diseases, EarlyView.
ABSTRACT Intensification of fish aquaculture worldwide has led to severe problems of diseases caused by parasitic dactylogyrideans. In this study, the anti‐dactylogyridean efficacy of treating Colossoma macropomum with baths of emamectin benzoate (EMB) was investigated for the first time, along with the effects of this treatment on the haematology and ...
Raimundo Rosemiro de Jesus Baia   +4 more
wiley   +1 more source

Toxicity and Organ Distribution of Mercury in Freshwater Fish (Oreochromis niloticus) after Exposure to Water Contaminated Mercury (HgII)

open access: yesToxics, 2019
The purpose of this study was to investigate the toxicity and the distribution of mercury (Hg) in the main tissues of freshwater fish (Oreochromis niloticus) after being exposed to water containing Hg(II).
Suhendrayatna Suhendrayatna   +4 more
doaj   +1 more source

Aquatic Effects of a Localized Oil Spill on Lake Conway, AR and Its Tributaries [PDF]

open access: yes, 2015
Oil spills, no matter where they occur, elicit environmental concern and avoiding these disasters should be a priority. Old pipelines that are not regularly maintained and carry large amounts of crude oil long distances are of particular concern.
Bouldin, J. L., Kennon, M. E.
core   +3 more sources

ANALISIS FITOKIMIA DAN PENENTUAN NILAI LC50 EKSTRAK METANOL DAUN LIWAS

open access: yesJURNAL ILMIAH SAINS, 2014
ABSTRAK Penentuan nilai LC50 dari ekstrak metanol daun liwas menggunakan metode Brine Shrimp Lethality Test (BSLT) terhadap hewan indikator udang Artemia salina menunjukkan nilai LC50 dari  A. salina bersifat sangat toksik.Nilai LC50 yang didapatkan sebesar 15,696 mg/L.
Sumihe, Gerry   +2 more
openaire   +3 more sources

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