蒸发影响情况下二维不稳定流有限单元法的排水计算

在内陆干旱区，由于蒸发强烈，因此在进行排水计算时，必须考虑蒸发对地下水运动的影响。文中推导了地下水蒸发与埋深呈线性关系时的二维不稳定流排水的Galerkin有限单元方程，并分析了新疆典型灌区的排水效果。分析认为：地下水位在排水系统和地面坡度作用下，其降落速度经历了由快到慢的过程，前两天的累积降深平均为1.2米，后三天的累积降深为平均为0.9米；农田的排水农沟间距为100米时，排水5天后，地下水位就可降低到2米以下，表明排水效果较好。     

贵州柳杉云毛虫调查初报及风险评估

柳杉云毛虫首次在贵州省大方县猫场镇发现危害杉木。本文对其发生、分布、危害、生物学特性进行了初步调查，并对其危害进行风险评估分析，提出潜在危害性和防治对策。     

Mechanism responsible for pulmonary fibrosis induced by concomitant chronic smoke exposure and pentoxifylline administration

AIM: To investigate the impact of long-term administration of pentoxifylline (PTX) on morphology and inflammation of the lung in mouse models with chronic exposure of cigarette smoke. METHODS: Male BALB/c mice were randomized into the following four study groups: smoke-exposure only, shamed smoke-exposure, smoke-exposure and PTX administration, shamed smoke-exposure and PTX administration. Animals assigned to smoke-exposure were put inside a chamber twice a day for cigarette smoke exposure. The oral dose of PTX allocated to each mouse was about 20 mg·kg-1·d-1. Animals were sacrificed anaesthetically at day 120. Slices of lung were stained with H&E for pathological analysis. Modified ashcroft pulmonary fibrosis score (mAPFS) was estimated, and IFN-γ (a Th1 cytokine), IL-4 (a Th2 cytokine) in broncho-alveolar lavage fluid (BALF) and hydroxyproline in mouse lung tissue were measured by commercial kits of ELISA assay. RESULTS: Lungs in smoke-exposure only group exhibited emphysema-like morphology, low mAPFS (median 1.50, 95%CI 1.25-3.75), lowest hydroxyproline (2.43±0.11) mg/L and lowest ratio of IL-4 to IFN-γ (20.3±25.5), whereas lungs in smoke-exposure and PTX interference group exhibited interstitial fibrosis-like morphology, highest mAPFS (4.75, 4.09-5.71), highest hydroxyproline (5.57±0.55) mg/L and highest ratio of IL-4 to IFN-γ (70.7±59.9) among the four study groups (P<0.01). CONCLUSION: Interference of pulmonary inflammation induced by chronic smoke-exposure with PTX leads to the development of pulmonary fibrosis, which may relate to the turnover of Th1 polarized inflammation into Th2 polarized inflammation of the lungs.     

节水灌溉植物需水信息检测的研究

根据植物含水不同而引起的植物体液浓度变化的原理，提出利用植物体电阻变化的信息来判断需水程度的新方法。该方法通过玉米植物测试，表明了植物的生理电阻能很好地反映植物亏水程度，并得出玉米的生理电阻在小于40kW时需灌水；在40～50kW时植株水分适宜的结论。为有效进行生理电阻的检测，本研究自制了便携式与单片机式2种类型的植物需水信息仪。通过反复、大量、长期的实验证实了本研究的论点是可行性的，其配套的植物需水信息仪能快速准确的检测植物的亏水程度，为旱田地区节水灌溉提供了新的有效的检测手段。     

高职高专英语教学改革探讨

高职高专英语教学在培养学生掌握必须的、实用的英语语言知识和技能方面发挥了重要作用,但近年来老一套的教学模式已越来越不适于社会经济迅猛发展对英语教学的要求.文章拟高职高专英语教学改革及今后的发展提出自己的看法.     

如何进行森林火灾现场分析

针对森林火灾案件侦破时存在的火场面积大,现场处于开放状态,起火点难查找,起火原因难确定等问题,着重从火灾现场分析的基本方法和要求,火灾性质和起火特征,起火时间和起火点的判定.起火原因分析等方面进行了论述.     

鸡腰豆高产栽培技术

鸡腰豆属豆科食用豆类多花菜豆属，该豆是目前外贸出口比较畅销的杂豆品种之一，主要出口13本、欧洲等国家和地区。兰坪县农技推广中心于2001年开始引进该豆在河西乡、中排乡进行种植，经试验、示范证明，该品种具有生长期短、适应性强、病虫害少、需肥量少、易种植等特点。净种每公顷产1500～2625kg，在玉米地套种每公顷产900～1050kg，是目前种植业结构调整和农民增收的理想杂豆品种之一。     

巴山松生长及数量成熟龄初步研究

通过对26株巴山松解析木资料的统计整理,并对其生长量进行分析,利用各种"经验方程"和"过程方程"对其拟合,发现Gompertz生长曲线对巴山松生长情况拟合较好,拟合的胸径、树高、材积方程为:Y=Ke[-1.246 398 491e(1.957 708 132X)3;Y=Ke[-1.293 557 657e(-0.012 173 68x)];Y =Ke[-2.402 839e(-0.0108 4X)].研究发现,巴山松在较好的立地条件和与其适应的环境下能较好地生长,其数量成熟龄较大,达到109 a,是培育大径阶材的理想树种.     

家禽肾病综合征及其防治措施

家禽肾病综合征是由多种病因引起的肾脏机能障碍的总称,包括肾结石、肾炎、痛风症、输尿管结石和尿毒症等,主要表现为肾肿大、苍白,肾小管和输尿管出现尿酸盐沉积,严重者引起肾结石和内脏型、关节型痛风.     

Immunologic mechanism of CXCL10 and its receptor involved in endometriosis

AIM: To investigate the immunologic mechanism of CXC chemokine ligand 10(CXCL10) and its receptor CXC chemokine receptor 3(CXCR3) involved in the process of endometriosis (EM). METHODS: Serum samples were collected from 3 groups: EM patients without operation (n=76), EM patients with operation (n=10) and the normal control persons (n=76). CXCL10 and CA125 concentrations were detected by means of ELISA and chemiluminometry. Cell surface antigens on the activated PBMC-CD3 and CXCR3, as well as CXCR3 subgene-CXCR3A and CXCR3B were tested by flow cytometry (FC) and RT-PCR when PBMC was separated from women with EM (n=10) and without EM (n=10), and then activated. RESULTS: Serum CXCL10 concentrations between three groups were significanly different (P<0.05). Compared to normal control group, although the supernatant CXCL10 concentration and CD3+/CXCR3+PBMC number in EM group has no significant difference (P>0.05), highly expressed CXCR3B in EM group rather than CXCR3A was observed. CONCLUSION: CXCL10 in women with EM is low, indicating that it plays a vital role in the process of EM and immune system of the women with EM is defected and impaired. The immunoreactivity of PBMC from both EM patients and normal person is same to activated signal, but the productions are different: PBMC in EM group mainly express CXCR3B but PBMC in normal person mainly express CXCR3A after activation, which may be one of the immune mechanisms that EM escapes from immunological lethal effect of the infected host.