低档绿茶在养殖业中的开发利用

我国绿茶资源丰富,低档绿茶作为一种良好的绿色饲料添加剂在养殖业中具有广阔的应用前景。低档绿茶含有大量的茶多酚,对动物而言,具有抗病毒、提高肌体免疫力、降血脂等功用。     

Knockdown of growth hormone receptor prevents growth hormone induced inflammatory cytokine production in 3T3-L1 adipocytes

AIM: To investigate the effect of growth hormone receptor (GHR) knockdown on nuclear factor-κB (NF-κB) activity and inflammatory cytokine production stimulated by growth hormone (GH) in 3T3-L1 adipocytes. METHODS: The specific siRNA for GHR was transfected into 3T3-L1 adipocytes to silence GHR expressions. The effects of GH on NF-κB activation and inflammatory cytokine production in 3T3-L1 adipocytes transfected with siRNA-GHR or siRNA-control were measured by dual-luciferase system analysis, real-time RT-PCR and ELISA. RESULTS: The protein expression of GHR was diminished after transfection with GHR specific siRNA. Dual-luciferase reporter system analysis revealed that GHR knockdown resulted in attenuation of GH-stimulated NF-κB activation in the 3T3-L1 adipocytes. GHR knockdown ameliorated the GH-induced production of inflammatory cytokines TNF-α, IL-1β, IL-6, MCP-1 and MIP-1α in the 3T3-L1 adipocytes. CONCLUSION: Knockdown of GHR might be efficacious to prevent GH-induced inflammatory responses in the 3T3-L1 adipocytes.     

Recycling of isabgol (Plantago ovata Forsk.) straw biomass and mineral powder with bio-inoculants as an effective soil amendment for isabgol cultivation

Efficient utilization of isabgol (Plantgo ovata Forsk.) straw biomass through preparation of bio-active organic fertilizer in a natural composting process has not been studied. In this study, phosphate rock and silicate mineral (mica) powder were used as natural sources of phosphorus (P) and potassium (K), respectively. Cow dung slurry as a natural decomposer was mixed with the straw biomass at a 10:1 (weight/weight) ratio along with mineral powder. Then, nutrient-mobilizing bio-inoculants were used in the composting process after attaining thermal stabilization. The agronomic effectiveness of the resulting bio-active compost (BAC) as a bio-organic fertilizer was compared with that of conventional organics (farmyard manure and vermicompost) and chemical fertilizer (CF) by growing isabgol under field conditions. Composting with the natural sources of P and K along with the bio-inoculants increased the total nitrogen (13.6 g kg^-1), P (38.7 g kg^-1), and K (31.2 g kg^-1) contents in the final product (i.e., BAC) compared with composting without the mineral powder and bio-inoculants. Application of BAC remarkably improved the seed yield (2.5%) and husk quality of isabgol in comparison with conventional organics and CF. Compared with CF, BAC significantly boosted the economic yield of isabgol by improving the husk recovery (2.5%) and mucilage yield (4.12%). Furthermore, BAC significantly improved the soil quality by increasing organic carbon (C), available nutrients, and microbial biomass C contents, as well as enzyme activity. The positive correlation between soil and plant parameters also highlighted the benefits of BAC for isabgol production through soil quality improvement. Therefore, it can be considered as a zero-waste technology, whereby a large quantity of straw biomass generated from isabgol cultivation, which contains essential nutrients, can be recycled back to the soil. Furthermore, BAC can be effectively used as a bio-active organic fertilizer, particularly in systems where chemical inputs are restricted, such as organic agriculture.     

吉林省低等级耕地分布及性状分析

本文在吉林省耕地质量评价基础上,分析了低等级耕地(七等地、八等地、九等地、十等地)的分布情况,并采用分类汇总的方法,对各障碍因素的概念型评价指标和数值型评价指标进行探讨,结果表明:吉林省低等级耕地面积为157.7万hm2,主要障碍因素是盐碱、酸化、瘠薄、障碍层次和渍潜.其中,盐碱面积最大,占低等级耕地面积的54.34％...     

直肠前壁低度恶性间质瘤3例临床分析

目的探讨直肠前壁低度恶性间质瘤的诊断及手术治疗效果．方法回顾性分析3例直肠前壁低度恶性间质瘤患者的临床资料．结果3例患者均行手术治疗，经病理及免疫组化证实均为直肠低度恶性间质瘤．其中，2例完整切除，1例未完整切除．未完整切除者术后16个月死亡，另2例现无瘤存活．结论直肠前壁低度恶性间质瘤临床虽极少发生，但术前仍可作出初步诊断，病理及免疫组化可确诊，术中要尽可能完整切除肿瘤，这是治疗的关键，可明显改善预后．     

如何上好低年级体育课

目前,学校体育教育的任务是:增强学生体质,提高身体素质和生活质量;培养学生终身体育的观念和习惯,为学生终身体育打下坚实的基础.在小学阶段,低年级教学是基础.这个基础是否扎实,对以后教学的顺利开展起着决定性的作用.     

Oesophageal leiomyosarcoma in dogs: surgical management and clinical outcome of four cases

Oesophageal leiomyosarcoma has yet to be reported in dogs. This retrospective case series describes the case management and clinical outcome of four dogs with oesophageal leiomyosarcoma treated by marginal excision alone. Histological features used to determine tumour grade included capsular invasion, percent necrosis, pleomorphism and mitotic rate. All tumours were designated grade 1 leiomyosarcoma. Excision of all grossly evident tumour tissue was achieved in two of the four cases; however, histopathologic evaluation showed tumour cells at the surgical margins in one of these two cases. Two dogs had grossly incomplete excision. Two dogs died from unrelated conditions, one 3 years and 5.5 months after surgery, the other at 65 days. One dog had persistent mega‐oesophagus and was lost to follow‐up 388 days after surgery and one dog is still alive (last follow‐up 405 days after surgery). Despite large tumour size and incomplete excision, surgical removal of low‐grade leiomyosarcomas can result in long‐term resolution of clinical signs.     

益生菌在肥胖及其代谢综合症中的潜在作用

肥胖以及相关的代谢综合症已经成为全球性的公共健康问题.大量的研究表明,肥胖形成以及减肥过程均与肠道茵群密切相关且相互影响.肠道茵群以及弱炎症反应成为肥胖以及相关代谢综合症的两大重要影响因素.文章综述了近几年来,肠道菌群失调对宿主能量储存以及新陈代谢的影响,以及弱炎症反应对肥胖引起的代谢综合症的影响.大量的研究证明,益生...     

干燥冷却空调系统的研究进展与应用

干燥冷却空调由低品位热源驱动,干燥转轮处理潜热负荷,蒸发冷却器处理显热负荷,实现温湿度独立控制。与传统空调相比,低品位热源与除湿转轮相结合的新型空调系统在人体舒适度、能源节约、保护环境等方面都具有优势。文章介绍了除湿转轮的工作机理,干燥冷却空调系统形式,太阳能及其他低品位热源在干燥冷却空调系统中的发展与应用情况。