1. The detection rate of methanal sodium bisulfite was the lowest in steamed bun (0.0%) and the highest in vermicelli (22.9%).

2. Conclusion Either 1% methanal or 0.5% hydrochloric acid abdominal cavity injection method was very simple and easy and economy in establishment of Syrain Hamster intestinal adhesions model.

3. Or methanal Formaldehyde (37%) in water solution, called formalin, is used as a preservative, an embalming agent, and a disinfectant .

4. Method Applied the MKJ air disinfecting machine and methanal plus potassium permanganate Fumigating to disinfect the air in emergency room, and then compared the disinfecting effect among them.

5. Methanol is used as a solvent and in methanal production.

6. Methanal and ethanol fuel is of strategic significance from the standpoint of our energy multiple and energy security.

7. The excess of methanal in food will harm the human body. There're many methods of detecting methanal in food. A quick detection reagent for methanal is described in the paper.

8. Simple examples of aldehydes are methanal ( formalaehyde , HCHO ) and ethanal ( acetaldehyde (), CH 3 CHO ).

9. Observing and comparing the detection results between which were spiked with methanal and no spiked one were performed.

10. For the sake of contrast, the atmospheric SO_2 over Leshan urban area was determined by two analytical methods, methanal absorption and TCM absorption.

11. For Group B, the vitalight lamp radiation and steaming of methanal plus PP were used in combined air sterilization.

12. Their sampling, specimen preservation as well as analysis are discussed. And the characteristics, applied range and shortcomings of methanal absorbent method are pointed out.

13. Create the model with sick sinus syndrome by external application of 20% methanal on the sino-atrial node. Observe the changes of heart rate and electro-physiological index of sinoatrial node.

14. Green environmental protection, harmful solvents are free such as dimethyl benzene, methanal ect.

15. Conclusion Glutaraldehyde content determined value is affected by the negative interference of sodium nitrite and sodium bicarbonate and the positive interference of methanal.

16. All the materials from the autopsies were fixed with 10% methanal.

17. It introduces a process of synthesizingmethylenebisacrylamide from acrylamide and methanal, method of sample analysis and discusses the conditions and influencing factors.

18. An aliphatic aldehyde, which is one of the most important industrial chemicals, its officially approved name, is methanal, with formula HCHO.

19. The results show that compared with gasoline engine oil, the degree of oxidation and nitration of gasoline engine oil by adding methanol, methanal and methane acid is increased.