Influence of main dietary chemical constituents on the in vitro gas and methane production in diets for dairy cows

Background： Modification of chemical composition of diets fed to dairy cows might be a good strategy to reduce methane（CH4） production in the rumen. Notable reductions of CH4 production compared to conventional highroughages rations were more frequently observed for very concentrated diets or when fat supplements were used. In these cases, the reduction in the gas emission was mainly a consequence of an overall impairment of rumen function with a reduction of fiber digestibility. These strategies do not always comply with feeding standards used in intensive dairy farms and they are usually not applied owing to the risks of negative health and economic consequences.Thus, the present study evaluated the effects of seven commercial diets with contents of neutral detergent fiber（NDF）,protein and lipids ranging 325 to 435 g/kg DM, 115 to 194 g/kg DM, and 26 to 61 g/kg DM, respectively, on in vitro degradability, gas（GP）, and CH4 production.Results： In this experiment, changes in the dietary content of NDF, crude protein（CP） and lipids were always obtained at the expense or in favor of starch. A decreased of the dietary NDF content increased NDF（NDFd） and true DM（TDMd） degradability, and increased CH4 production per g of incubated DM（P 〈 0.001）, but not that per g of TDMd. An increase of the dietary CP level did not change in vitro NDFd and TDMd, decreased GP per g of incubated DM（P 〈 0.001）, but CH4 production per g of TDMd was not affected. An increased dietary lipid content reduced NDFd, TDMd,and GP per g of incubated DM, but it had no consequence on CH4 production per g of TDMd.Conclusions： It was concluded that, under commercial conditions, changes in dietary composition would produce small or negligible alterations of CH4 production per unit of TDMd, but greater differences in GP and CH4 production would be expected when these amounts are expressed per unit of DM intake. The use of TDMd as a standardizing parameter is proposed to account for possible difference in DM intake and productivity.

An Intelligent Approach in Design Optimzation Based on Determining Constraints Compatibility

Based on monotonicity analysis and computer symbolic manipulating technique,a procedure for determining constraints compatibility in design optimization hasbeen proposed in this paper. By using the proposed method relationshipsbetween constrains can be determined and the optimization is greatly simplifid.The method is code with intelligent production systems.

Observation of clinical therapeutic effect of different techniques of acupotomy on coracoid pain of frozen shoulder

Objective:To explore the manipulation techniques of acupotomy in treatment of coracoid pain of frozen shoulder.Methods:A total of 60 patients with coracoid pain of frozen shoulder were collected.The randomized double-blind controlled method was adopted.Using random number table,the patients were divided into two groups,named a treatment group and a control group,30 cases in each one.In the treatment group,the pricking technique of acupotomy was adopted.In the control group,the traditional dissection technique of acupotomy was used.The duration of treatment was 5 weeks.Acupotomy was given once a week.At the end of treatment,pain index(visual analogy scale,VAS)and the therapeutic effect index were used to evaluate the therapeutic effect.Results:Before treatment,the average VAS score was 8.31±0.84 in the treatment group and it was 8.14±0.24 in the control group.After treatment,the average VAS score was 0.01±0.89 in the treatment group and it was 0.10±1.01 in the control group.The difference was significant before and after treatment in the patients of the two group(both P<0.05).The difference before and after treatment was not significant between the two groups.The effective rate was 100%and the remarkably effective rate was100%in either the treatment group or the control group.Conclusion:The pricking technique of acupotomy achieves the same therapeutic effect on coracoid pain of frozen shoulder as compared with the dissection technique,which suggests that the dissection technique is not the indispensable manipulation in the treatment of the disease.The pricking technique of acupotomy brings a smaller wound,less medical damage in,less suffering in patients and quicker recovery of wound,as well as quicker remission of pain after acupotomy.Such modified method of acupotomy is more significant in practice.However,a further research is suggested for the pathological mechanism of frozen shoulder.

Effects of Different Scraping Techniques on Body Surface Blood Perfusion Volume and Local Skin Temperature of Healthy Subjects

Objective: To study the mechanism and effects of different scraping techniques on body surface blood perfusion volume and local skin temperature of healthy subjects and to provide a baseline for microcirculation and energy metabolism for the evaluation of the therapeutic effects of scraping. Methods: Changes of the local blood perfusion volume and skin temperature of healthy subjects before and after applying different scraping techniques were observed with a laser Doppler imager combined with an infrared thermographic device and the resulting data was analyzed with imaging and processing software for statistical analysis. Results: Local blood perfusion volume and skin temperature all increased after both reinforcing and reducing scraping techniques. The value of blood flow 60 and 90 min after the reducing technique was significantly higher than that after the reinforcing technique (P<0.01), while the skin temperature increased after both techniques but was not significantly different between the two (P>0.05). Conclusion: Scraping can significantly improve the local blood perfusion volume, increase skin temperature and promote local blood circulation and metabolism of tissues.