نتایج جستجو برای: boric acids

تعداد نتایج: 266446  

Journal: :The journal of physical chemistry. A 2008
M Elango V Subramanian Anuja P Rahalkar Shridhar R Gadre N Sathyamurthy

Cardinality guided molecular tailoring approach (CG-MTA) [Ganesh et al. J. Chem. Phys. 2006, 125, 104019] has been effectively employed to perform ab initio calculations for large molecular clusters of boric acid. It is evident from the results that boric acid forms nanotubes, structurally similar to carbon nanotubes, with the help of an extensive hydrogen-bonding (H-bonding) network. Planar ro...

2013
Liyun Liu Liyun Huang Yan Li

This study investigates the effect of boric acid and sucrose on the germination and growth of Areca catechu L (areca palm). Using areca pollen from Hainan, China, this study determines the influence of culture media with different concentrations of boric acid and sucrose on the germination and growth of areca pollen. Results show that the germination and growth of the pollen tube growth are hig...

Journal: :Journal of economic entomology 2004
Michael K Rust Donald A Reierson John H Klotz

Boric acid, imidacloprid, and thiamethoxam in sucrose aqueous baits had different delayed toxicities to worker Argentine ants, Linepithema humile (Mayr). The concentrations required to produce an LT50 (time required to produce 50% mortality) within 1-4 d were 3.63-0.55% boric acid, 9.2 x 10(-3) to 7.1 x 10(-4)% imidacloprid, and 3 x 10(-4) to 2 x 10(-5)% thiamethoxam. The three toxicants were n...

2004
CAROLINE COX

Boric acid and its chemical relatives are pesticides that are derived from the element boron. Boron rarely occurs alone and is typically found in combination with other elements; common combinations are boric acid or borates.1 Unlike many pesticides which are synthetic compounds,2 boric acid and related pesticides are naturally occurring compounds.1 Boron compounds are widely found in rivers, s...

Journal: :journal of ornamental plants 2015
m. b. hoseinzadeh liavali m. zarchini

nanosilver of nanometer-sized silver (ag+) particles (2-5 nm diam) are used in various applications as an anti-microbial. boric acid (h3bo3) is water soluble (ph=7). boric acid is ethylene synthese inhibitor and reduce ethylene production through reducing the acc synthase and acc oxidase delays senescence of flower. in this study of different concentrations of boric acid and nano-silver was eva...

2004
MICHAEL K. RUST DONALD A. REIERSON JOHN H. KLOTZ

Boric acid, imidacloprid, and thiamethoxam in sucrose aqueous baits had different delayed toxicities toworker Argentine ants,Linepithema humile (Mayr). The concentrations required toproduce anLT50 (time required toproduce 50%mortality)within 1Ð4dwere 3.63Ð0.55%boric acid, 9.2 10 3 to 7.1 10 % imidacloprid, and 3 10 4 to 2 10 % thiamethoxam. The three toxicants were not repellent. Other laborato...

2005
Ayd›n Karaarslan Murat Özcan

OBJECTIVES: Topical antiseptics and antifungal agents are frequently used for the treatment of otomycosis. Topical use of boric acid solution in alcohol is also recommended, and some studies report its clinical efficacy. However, there are no studies in the English literature concerning the in vitro efficacy of boric acid salts on fungi isolated from the ears with otomycosis. In this study, we ...

Journal: :Journal of economic entomology 2003
Ludek Zurek J Chad Gore S Michael Stringham D Wesley Watson Michael G Waldvogel Coby Schal

Boric acid dust treatments were evaluated as a tool for the integrated management of the German cockroach, Blattella germanica (L.), in commercial confined swine production. The efficacy of boric acid dust was comparable to that of an organic residual insecticide, cyfluthrin, which is commonly used to control cockroaches in this environment. Fall treatments suppressed the cockroach population f...

2002
Abhijit Roy Amitava Choudhury

Boric acid (B) forms a 2:1 hydrogen-bond adduct, M·2B, with melamine (M), wherein, a finite tetrameric ribbon of boric acid forms hydrogen bonds with the nitrogen donor sites of M. Hydrogen-bonded layers of B and M in the bc-plane are connected by boric acid units along the a-axis to give a three dimensional structure. Interestingly, one of the amino groups of M does not participate in hydrogen...

Micronutriens deficiency is prevalent in case of drought stress conditions, so complementary boron and zinc nutrition are important for crops to overcome drought stress. This study evaluated the effect of zinc and boron foliar application on physiological traits of sesame under different irrigation levels. The experiment was conducted as a split plot in a randomized complete block design with t...

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