Comparative study on CO_2 emissions from different types of alpine meadows during grass exuberance period

Potentilla fruticosascrub, Kobresia humilismeadow and Kobresia tibeticameadow are widely distributed on the Qinghai-Tibet Plateau. During the grass exuberance period from 3 July to 4 September, based on close chamber-GC method, a study on CO 2 emissions from different treatments was conducted in these meadows at Haibei research station, CAS. Results indicated that mean CO 2 emission rates from various treatments were 672.09±152.37 mgm -2 h -1 for FC (grass treatment); 425.41±191.99 mgm -2 h -1 for FJ (grass exclusion treatment); 280.36±174.83 mgm -2 h -1 for FL (grass and roots exclusion treatment); 838.95±237.02 mgm -2 h -1 for GG (scrub+grass treatment); 528.48±205.67 mgm -2 h -1 for GC (grass treatment); 268.97±99.72 mgm -2 h -1 for GL (grass and roots exclusion treatment); and 659.20±94.83 mgm -2 h -1 for LC (grass treatment), respectively (FC, FJ, FL, GG, GC, GL, LC were the Chinese abbreviation for various treatments). Furthermore, Kobresia humilismeadow, Potentilla fruticosascrub meadow and Kobresia tibeticameadow differed greatly in average CO 2 emission rate of soil-plant system, in the order of GG>FC>LC>GC. Moreover, in Kobresia humilismeadow, heterotrophic and autotrophic respiration accounted for 42% and 58% of the total respiration of soil-plant system respectively, whereas, in Potentilla fruticosascrub meadow, heterotrophic and autotrophic respiration accounted for 32% and 68% of total system respiration from GG; 49% and 51% from GC. In addition, root respiration from Kobresia humilismeadow approximated 145 mgCO 2 m -2 h -1 , contributed 34% to soil respiration. During the experiment period, Kobresia humilismeadow and Potentilla fruticosascrub meadow had a net carbon fixation of 111.11 gm -2 and 243.89 gm -2 , respectively. Results also showed that soil temperature was the main factor which influenced CO 2 emission from alpine meadow ecosystem, significant correlations were found between soil temperature at 5 cm depth and CO 2 emission from GG, GC, FC and FJ treatments. In addition, soil moisture may be the inhibitory factor of CO 2 emission from Kobresia tibeticameadow, and more detailed analyses should be done in further research.

Reaction to Reading The Age of Exuberance

Up till now only a few papers have been found to analyze The Age of Exuberance. It is extremely interesting for us to read The Age of Exuberance:backgrounds to eigh-teenth century English literature by Donald Greene, who tries to see the eigh teenth century from a different perspective, observing it as an exuberant, luxuriant age full of variety. It is the eighteenth century that witnesses the emergence of many news things.

Exuberant callus formation misdiagnosed as osteosarcoma:a case report

Reactive lesions of bone and soft tissue can appear alarming on histologic examination because they are often cellular and have atypical cytologic features,such as distinct nucleoli,mild hyperchromasia,and mitotic activity.Reactive lesions of bone and periosteum also produce bone and cartilage matrix,resulting in confusion with osteosarcoma or chondrosarcoma.Careful attention to key cytomorphological features such as the pattern of bone formation,uniform appearance of cells,and absence of atypical mitoses should help identify the reactive nature of a lesion.Correlation with clinical and radiological findings is also imperative to avoid misclassification of the tumor because reactive lesions often arise at sites where osteosarcoma and chondrosarcoma are rare(eg,the hand)and lack aggressive radiological features.Here we present a case of exuberant callus formation after avulsion fracture of tibia in a three year-old Iranian girl which misdiagnosed as osteosarcoma.

Comparison of the effect of low-frequency electroacupuncture on serum leptin and NPY contents of male and female patients with simple obesity

Objective To explore the difference of low-frequency electroacupuncture in regulating serum leptin and neuropeptide Y（NPY） of male and female patients with simple obesity due to spleen deficiency and damp exuberance. Methods Eighty patients with simple obesity, including 37 males and 43 females, were included in this study. In both groups（male group and female group）, Yīnlíngquán（阴陵泉 SP 9）, Sānyīnjiāo（三阴交 SP 6）, Zúsānlǐ（足三里 ST 36）, Fēnglóng（丰隆 ST 40）, Qūchí（曲池 LI 11）, Tiānshū（天枢 ST 25）, Zhōngwǎn（中脘 CV 12）, Shuǐfēn（水分 CV 9）, Qìhǎi（气海 CV 6）, and Guānyuán（关元 CV 4）. were selected, and low-frequency electroacupuncture treatment was applied. Needles were retained for 30 min. The treatment was conducted once a day, and 10 times were considered as one course of treatment. Two courses were needed. The changes of weight, BMI（body mass index）, F%（fat percentage） and serum leptin and NPY contents of patients in the two groups before and after treatment were observed and analyzed comparatively. Results After treatment, in male group, the weight lost（9.24±2.55） kg, BMI reduced by 4.19±2.30, F% reduced by 3.98±2.13, serum leptin level reduced by（0.66±0.23） ng/m L, and serum NPY level reduced by（18.56±2.89） pg/m L; in female group, the weight lost（6.77±2.31） kg, BMI reduced by 2.65±0.93, F% reduced by 4.98±2.30, serum leptin level reduced by（3.49±1.09） ng/m L, and serum NPY level reduced by（11.21±1.97） pg/m L. The results reduced significantly when compared with the level before treatment（P〈0.05, P〈0.01）. The loss of weight, BMI and serum NPY content in male group was more obvious than that in female group（all P〈0.01）, and the loss of F% and serum leptin content in female group was more obvious than that in male group（both P〈0.01）. Conclusion Low-frequency electroacupuncture can significantly regulate the weight, BMI, F% and serum leptin and NPY contents of male and female patients with simple obesity, and there are gender differences. In terms of reducing weight, BMI and serum NPY content, the efficacy of low-frequency electroacupuncture in males is superior to that in females, while in terms of reducing F% and serum leptin content, the efficacy in females is superior to that in males.

Exuberant Economy No Problem?

Spurred by a 31.3 percent rise in urban fixed assets investment, Chinese economic growth in the first half of the year rose 10.9 percent year-on-year, according to the National Bureau of Statistics, with the second quarter recording 11.3 percent-a 20-year high.