294 Effect of feeding formaldehyde-treated feed to pigs throughout the growing period on amino acid utilization from synthetic lysine or protein sources
2
Citation
0
Reference
10
Related Paper
Citation Trend
This is research on the influence of the synthesis condition of phenol formaldehyde resin on the contents of free formaldehyde in resin.The results showed that the contents of free formaldehyde in resin is 0.12%～11.57% when the mole ratio of initial formaldehyde to phenol was(1.2～2.4) ∶1;The whole reaction could be divided into two procedures:it could be heated at 65 ℃ and 95 ℃ for 40 min respectively,resulting in lower contents of free formaldehyde;The most suitable dosage of catalyzer was 6%～9% of the amount of phenol;With the increasing use of carbamide,the contents of free formaldehyde would decrease,however,it had the threshold,so optimal dosage of carbamide was 10%～12% of amount of formaldehyde.
Cite
Citations (0)
【Formaldehyde, an indoor volatile organic compound, is considered toxic due to its carcinogenic risk. Recently, we isolated a formaldehyde-degrading bacterium Pseudomonas sp. YK-32. A crude enzyme prepared from YK-32 also degraded formaldehyde, suggesting that YK-32 cells have formaldehyde hydrogenase activity which is one of the important factors in formaldehyde degradation. The formaldehyde hydrogenase activity was increased 1.25 fold by adding 0.1 % glucose and formaldehyde to the culture medium. In addition, treatment with 1 mM EDTA as a permeabilizer promoted the degradation of formaldehyde and increased the enzymatic activity.】
Degradation
Hydrogenase
Cite
Citations (0)
Objective To explore the removal effects of formaldehyde from indoor air and plywood by a formaldehyde-cleaning agent. Methods (1)experiment on removal of formaldehyde in indoor air: 2 newly decorated office rooms were selected, the indoor air was treated by formaldehyde-cleaning agent in one test room, and the other was used as control. After treatment, the concentrations of formaldehyde in two office rooms were measured and compared between them. (2)experiment on the removal effects of formaldehyde in plywood. The plywood samples were selected and divided into two groups, one was treated by formaldehyde- cleaning agent as test group, the other as the control. The emisson of formaldehyde from plywood was measured and compared between two groups. Results The removal efficiencies of formaldehyde in indoor air were 82.94%, 91.43%, 95.69%, at the 24th, 48th, 72th hour after the treatment of formaldehyde-cleaning agent respectively. The formaldehyde concentration in indoor air of test room met the requirement of the national standard after 72h-treatment of formaldehyde-cleaning agent. The removal efficiencies of formaldehyde emitted from plywood were 84.71%, 90.55%, 90.96% at the 24th, 48h, 72th hour after the treatment of formaldehyde-cleaning agent respectively. The emission amount of formaldehyde from plywood met the requirement of the national standard after 24h-treatment of formaldehyde-cleaning agent. Conclusion Formaldehyde-clearning agent presented significant removal effects on formaldehyde from indoor air and plywood.
Indoor air
Cite
Citations (0)
This paper studied the aggrandizement wood floor formaldehyde release changes through the determination in newly decorated rooms and laboratory analyzis,to explore the influence of time,temperature,and prices for wood flooring formaldehyde emission.The results show that the formaldehyde pollution in newly decorated rooms was serious,of which 80% of the room formaldehyde concentration exceeded the national standard.All of three factors had impact on formaldehyde release: with the increase of time,wood flooring formaldehyde emission was increased firstly and then decreased;Temperature influenced wood floor formaldehyde emissions significantly.The wood flooring formaldehyde emissions in the order of 30 ℃ 25 ℃ 20 ℃ 15 ℃;Wooden floor price was more higher and the lower formaldehyde was released.When temperature was 25 ℃,the formaldehyde emission of the 80 yuan/m2 wooden floor reaches the maximum value after 4 days,and the absorption of formaldehyde concentration liquid was 85.70mg/L.
Cite
Citations (0)
Sterilizing properties of formaldehyde in anhydrous methanol and formaldehyde in water were compared. Formaldehyde in methanol achieved sterilization in 24 hr. Formaldehyde in water was found to sterilize in shorter periods of time and to have a longer shelf life than formaldehyde in methanol.
Anhydrous
Sterilization
Cite
Citations (6)
Formaldehyde, an indoor volatile organic compound, is considered toxic due to its carcinogenic risk. Recently, we isolated a formaldehyde-degrading bacterium Pseudomonas sp. YK-32. A crude enzyme prepared from YK-32 also degraded formaldehyde, suggesting that YK-32 cells have formaldehyde hydrogenase activity which is one of the important factors in formaldehyde degradation. The formaldehyde hydrogenase activity was increased 1.25 fold by adding 0.1 % glucose and formaldehyde to the culture medium. In addition, treatment with 1 mM EDTA as a permeabilizer promoted the degradation of formaldehyde and increased the enzymatic activity.
Degradation
Hydrogenase
Cite
Citations (0)
Formaldehyde allergic contact dermatitis (ACD) may be due to products with free formaldehyde or formaldehyde-releasing agents; however, assessment of formaldehyde levels in such products is infrequently conducted. The present study quantifies total releasable formaldehyde from "in-use" products associated with formaldehyde ACD and tests the utility of commercially available formaldehyde spot test kits.Personal care products from 2 patients with ACD to formaldehyde were initially screened at the clinic for formaldehyde using a formaldehyde spot test kit. Formaldehyde positive products were sent to the laboratory for confirmation by gas chromatography-mass spectrometry. In addition, 4 formaldehyde spot test kits were evaluated for potential utility in a clinical setting.Nine of the 10 formaldehyde spot test kit positive products obtained from formaldehyde allergic patients had formaldehyde with total releasable formaldehyde levels ranging from 5.4 to 269.4 µg/g. Of these, only two shampoos tested listed a formaldehyde-releasing agent in the ingredients or product literature. Subsequently, commercially available formaldehyde spot test kits were evaluated in the laboratory for ability to identify formaldehyde in personal care products.Chemical based formaldehyde spot test were more reliable than the enzymatic based test in identifying product releasable formaldehyde content. It is concluded that product labeled ingredient lists and available information are often inadequate to confirm the potential for formaldehyde exposure and chemical based spot test kits may have utility for identification of potential formaldehyde exposure from personal care products.
Cite
Citations (18)
In an alkaline solution,Ag+ can be reduced by formaldehyde to form silver nanoparticles,leading to the resonance light scattering(RLS) intensities of the system to be enhanced.Based on these phenomena,a new RLS method for trace formaldehyde determination in environment water samples was established.Under the optimized reaction conditions,the enhanced RLS intensities of the system has a good relationship with the concentration of formaldehyde in a range of 1.0×10-6～2.0×10-5 mol/L with the detection limit of 1.0×10-7 mol/L.The standard addition recovery ratio is in a range of 96.26% to 103.32% for formaldehyde detection in environmental water samples and in the indoor air.According to the phenomenon that the resultant from the reaction of Ag+ and formaldehyde has different colors in the presence of formaldehyde with different concentrations,a visual semi-quantificational method for detection of formaldehyde could be achieved.
Silver nanoparticle
TRACE (psycholinguistics)
Trace Amounts
Cite
Citations (0)
A fractional factorial design of experiments was used in studying the formaldehyde release and bound formaldehyde content of cotton printcloth treated with formaldehyde (HCHO). Foam application of the HCHO with Zn(NO 3 ) 2 .6H 2 O catalysis was used at wet pickups (WPU) up to 40%. Statistical analysis of the formaldehyde property data by multiple stepwise regression indicated that interactions of processing variables were responsible for (or correlated with) a substantial portion of the variability in the formaldehyde release and bound formaldehyde properties. The multiple regression model equation for bound formaldehyde did not contain the reaction time variable.
Cite
Citations (4)