[Sedation with stimulative circadian rhythm in mechanically ventilation patients in intensive care unit].

Objective: To sedate the mechanically ventilation patients in intensive care unit (ICU) with stimulative circadian rhythm, and evaluate whether the protocol has advantages in recovering natural circadian rhythm, duration of mechanical ventilation, and length of ICU stay after weaning of sedation.

Methods: A prospective random control trial was conducted. One hundred and twenty ventilated patients in ICU were randomly assigned to four groups: circadian rhythm (CR), daily interruption (DI), continuous sedation (CS) or demand sedation (DS) group, each n = 30.

[Measurement of methane and carbon dioxide emissions from ruminants based on the NDIR technique].

Methane (CH4) production in the rumen represents a loss of energy for the host animal; in addition, methane eructated by ruminants may contribute to a greenhouse effect or global warming. The dinumal CH4 and carbon dioxide (CO2) emissions from sheep were continuously recorded using the flow-through chamber method. A type new type of non-disperse infrared (NDIR) gas sensors based on pulse IR source was introduced, and by using the high performance pyroelectric IR sensor with built in interference filter and the "single light and two wavelengths" technology, CH4 and CO2 measurement from ruminants was achieved.

[Determination of inorganic elements in the soil-grass-animal system by sealed microwave digestion ICP-AES].

The contents of inorganic elements including K, Ca, Na, Mg, P, S, Fe, Cu, Mn, Zn, Mo, and Co in the soil-grass-animal mineral system from Qinghai Tibetan Plateau were determined by ICP-AES using high pressure system-sealed microwave digestion. The sample of soil was digested with HNO3-HF-H2O2 acids system, but others including pasture, animal fur, liver, and serum were digested with HNO3-H2O2 acids system. The operation would be simplified and the blank value would be decreased with the above acids systems.

[Spectroscopy technique and ruminant methane emissions accurate inspecting].

The increase in atmospheric CH4 concentration, on the one hand through the radiation process, will directly cause climate change, and on the other hand, cause a lot of changes in atmospheric chemical processes, indirectly causing climate change. The rapid growth of atmospheric methane has gained attention of governments and scientists. All countries in the world now deal with global climate change as an important task of reducing emissions of greenhouse gases, but the need for monitoring the concentration of methane gas, in particular precision monitoring, can be scientifically formulated to provide a scientific basis for emission reduction measures.

[Progress in application of near infrared reflectance spectroscopy to the study of ruminant nutrition].

The near infrared reflectance spectroscopy (NIRS) technique has been widely used in the study of ruminant nutrition with many of its operational merits such as facility, shortcut and accuracy, etc. Study suggested that the standard error of cross-validation (SECV) ranges from 1.6% to 2.

[A review on studies and applications of near infrared spectroscopy technique(NIRS) in detecting quality of hay].

The quality of hay can directly affect the price of hay and also livestock productivity. Many kinds of methods have been developed for detecting the quality of hay and the method of near infrared spectroscopy (NIRS) has been widely used with consideration of its fast, effective and nondestructive characteristics during detecting process. In the present paper, the feasibility and effectiveness of application of NIRS to detecting hay quality were expounded.

[Clinical trial to verify the value of the CD14(+) monocyte human leukocyte antigen DR as a marker in evaluating immunosuppression in patients with severe sepsis].

Objective: To verify that CD14(+) monocyte human leukocyte antigen DR (HLA-DR) may serve as a reliable index for immunosupression, and for prediction of prognosis as well as to evaluate the efficacy of Thymopentin (TP-5) to enhance immunologic function in patients with severe sepsis, and to evaluate the validity of compensatory anti-inflammatory response syndrome (CARS).

Methods: Patients in a SICU with symptoms and signs of severe sepsis conforming to the criteria set forth by ACCP/SCCM were enrolled in this clinical trial. CD14(+) monocyte HLA-DR was determined by flow cytometry.