Dietary selection of sheep grazing the semi-arid grasslands of Inner Mongolia, China at different grazing intensities.

The objective of this study was to investigate dietary selection of sheep grazing semi-arid grassland in Inner Mongolia, China, using the difference in organic matter digestibility (OMD) of herbage ingested and herbage on offer as indicator for selection. Faecal N was used as digestibility index for herbage ingested (FOMD), while OMD of herbage on offer (GOMD) was estimated from gas production obtained by the Hohenheim gas test. It was hypothesized that the difference between FOMD and GOMD is high, when grazing animals select against low quality herbage provided that herbage is abundant. In a grazing experiment, six grazing intensities (1.5, 3.0, 4.5, 6.0, 7.5 and 9.0 sheep/ha), representing light to very heavy grazing intensity for the semi-arid grassland, were compared. The amount of herbage on offer decreased with increasing grazing intensity. Independent statistical analysis of FOMD and GOMD showed that the differences between grazing intensities for both OMD determinations (FOMD: 54.0-57.3%, GOMD: 55.2-57.5%) were not significant (p > 0.05). The difference between FOMD and GOMD was not significant for grazing intensities, but varied between sampling periods from -4 to 1 percentage units. In conclusion, the lack of significance for the difference between FOMD and GOMD suggests that for the semi-arid grassland of Inner Mongolia, China, sheep did not select their feed due to a homogeneous nutritional composition of herbage on offer in 2005, regardless of grazing intensity.

Good outcome of neuromyelitis optica: a case report / 国际眼科杂志(Guoji Yanke Zazhi)

A 26 year-old Malay man presented with first attack of left eye optic neuritis that recovered fully with intravenous methylprednisolone after 3 weeks. He developed a second attack of optic neuritis in the right eye the following week. Lhermitte sign as well as Uthoff phenomenon were also positive. On day-3, he developed bilateral paraplegia and sensory loss at T8 level, which progressively worsen and became bedridden on day-5. MRI showed bilateral enhance-ment of the optic nerve with the presence of long multisegmental demyelinating plaque in the thoracic to lumbar spinal cord and the brainstem, sparing the brain hemisphere. He was promptly given high dose intravenous methylprednisolone followed by oral predni-solone. He was also assigned on intensive neuro-phy-siotherapy. He recovered after 3 months and was able to walk with walking aids. He recovered completely after 7 months and resumed working as site contactor. There was no relapse during the last 1 year follow-up. His final visual acuity improved to 6/9 in the right eye and 6/6 in the left eye. The visual field of the right eye showed per-sistent mild cecocentral scotoma. And diffuse depression.

Syphilis:an under-recognized cause of postoperative uveitis in elderly / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To report a case of postoperative uveitis secondary to syphilis in an elderly patient.METHODS:A 76-year-old Malay man, a case of bilateral immature cataract underwent uneventful right phacoemulsification. There was no history of uveitis before. On day 5 post operation, he developed sudden onset of vision blurring in the right eye. Examination showed generalized cornea edema with moderate anterior chamber reaction and increased intraocular pressure.RESULTS: The patient responded well to topical antibiotic and steroid. The intraocular pressure was controlled with anti-glaucoma agent. However, the patient developed similar episode of pain, redness and poor vision in the same eye after 3 weeks. Ocular examination revealed severe anterior uveitis with presence of mutton fat keratic precipitates. Venereal disease research laboratory (VDRL) and treponema pallidum hemagglutination assay (TPHA) were positive suggesting syphilis. The condition improved markedly with benzathine penicillin injection and topical steroid.CONCLUSION:This case illustrates syphilis as an under-recognized cause of postoperative uveitis in the elderly. Appropriate management with penicillin has showed rapid and remarkable outcome.

Bone health in urban midlife Malaysian women: risk factors and prevention.

The aim of this study was to identify risk factors associated with osteoporosis in urban midlife Malaysian women and to assess the effectiveness of lifestyle intervention in bone loss prevention with hormone replacement therapy (HRT) as a positive control. A total of 514 disease-free, uterus-intact, non-HRT-using women aged 45 years and older were recruited into the study. After initial bone mineral density (BMD) assessments, they were randomized into three groups: GI (control), G2 (lifestyle intervention), and G3 (lifestyle intervention with HRT). The study group was composed of 67.5% Chinese, 27.8% Malay, and 4.2% Indians with a mean age of 51.07+/-5.28 years. Two-fifths were postmenopausal, and the prevalence of osteoporosis was 24.1%, seen predominantly at the hip. Postmenopausal women had significantly lower mean BMD and a higher incidence of osteoporosis compared with the premenopausal women, 42.1% vs. 11.1% (p<0.0005). A lower incidence of osteoporosis was found in women who took calcium supplementation regularly as opposed to those who do not, 18.7% vs. 29.3% (p=0.036). Age and a greater postmenopausal duration showed a significant negative association with BMD, whereas higher family income, weight, body mass index, and waist and hip circumference were positively correlated. After 18-20 months, the effect of intervention was assessed based on BMD values of 279 women at baseline and after intervention. Lifestyle intervention alone was effective in premenopausal women, preventing over 90% of spinal bone loss compared with the controls, who lost 11.6% (0.046 g/cm2) bone mass with similar losses of hip bone, 2.0% (0.026 g/cm2) vs. 1.5% (0.020 g/cm2). Premenopausal women on HRT also showed a substantial decrease in spine and hip BMD, 18.6% (0.081 g/cm2) and 9.0% (0.122 g/cm2), respectively. The lifestyle intervention program retarded postmenopausal bone loss by 21% and 37% compared with controls, who lost 9.6% (0.141 g/cm2) and 6.0% (0.138 g/cm2) bone mass at the spine and hip. In comparison, lifestyle intervention with HRT increased postmenopausal BMD by 12.7% (0.216 g/cm2) at the spine and 1.9% (0.042 g/cm2) at the hip. The changes in hip BMD were influenced by current age, ethnicity, and income, while intervention had the strongest effect on spine BMD changes. In conclusion, lifestyle intervention prevented spinal bone loss in premenopausal women and retarded postmenopausal spine and hip bone loss compared with controls. The benefits of physical activity on spine and hip BMD highlight its potential as a safe and cost-effective alternative to HRT, which is not advocated because of its potential adverse effects.

Assay for Laccase activity by microcalorimetry: laccase was extracted from china lacquer of Rhus vernicifera.

The reactions between Laccase (extracted from China lacquer of Rhus vernicifera) and various substrates (3,4-Dihydroxybenzaldehyde, Guaiacol, Pyrogallol, Gallic acid) have been studied using LKB-2107 batch microcalorimetry system. Based on calorimetry, a new method has been proposed. Laccase activity and the Michaelis constant K(m) have been determined simultaneously by this method. The method is simple, sample-saving, and valid for a wider range of substrate concentrations. Furthermore, it can be extended for assaying other enzymes catalyzing reactions using this method.