Characterization of normal feline renal vascular anatomy with dual-phase CT angiography

Helical computed tomography angiography was used to evaluate the renal vascular anatomy of potential feline renal donors. One hundred and fourteen computed tomography angiograms were reviewed. The vessels were characterized as single without bifurcation, single with bifurcation, double, or triple. Multiplicity was most commonly seen for the right renal vein (45/114 vs. 3/114 multiple left renal veins, 0/114 multiple right renal arteries, and 8/114 multiple left renal arteries). The right kidney was 13.3 times more likely than the left to have multiple renal veins. Additional vascular variants included double caudal vena cava and an accessory renal artery. For the left kidney, surgery and computed tomography angiography findings were in agreement in 92% of 74 cats. For the right kidney, surgery and computed tomography angiography findings were in agreement in 6/6 cats. Our findings of renal vascular anatomy variations in cats were similar to previous reports in humans. Identifying and recognizing the pattern of distribution of these vessels is important when performing renal transplantation.     

基于AMEsim飞机襟翼液压系统故障分析与仿真

飞机襟翼系统的工作性能直接影响到飞机的安全性和机动性,故以飞机襟翼液压系统为研究对象,通过应用AMEsim软件对飞机襟翼液压系统进行建模仿真。研究了飞机襟翼液压系统的工作原理,并分析了襟翼液压系统常见故障。通过改动液压系统的参数实现对液压系统故障模拟,确定飞机液压系统故障特征参数,研究了在故障状态下飞机襟翼液压系统待测信号的变化特征。从而可以有效减少物理模拟,减少试验费用,提高设计效率。     

Effects of Dietary Protein and Lipid Levels on Growth,Nutrient Utilization,and the Whole‐body Composition of Turbot,Scophthalmus maximus,Linnaeus 1758, at Different Growth Stages

Three 9‐wk feeding trials were performed to assess the effects of dietary protein and lipid levels on the growth, feed utilization, and body composition of turbot, Scophthalmus maximus Linnaeus, at three different growth stages with initial average weight 4.5 ± 0.01, 59.1 ± 0.24, and 209.1 ± 0.21 g, respectively. Six practical test diets were formulated to contain three protein levels (45, 50, and 55%), each of which was supplemented with two lipid levels (12.0 and 16.0%), to produce a range of P : E ratios (from 87.4 to 110.0 mg protein/kcal). The results of three experiments suggested that growth performance generally improved with increasing dietary protein irrespective of dietary lipid. Fish fed diets with 55% protein (12 and 16% lipid, P : E ratio of 110.9 and 107.1 mg protein/kcal) had the highest specific growth rates (SGRs), feed efficiency ratios (FERs), and energy retention. At the same protein level, FER and protein efficiency ratio (PER) increased significantly with the increase of lipid except in large fish (initial average weight 209.1 ± 0.21 g). SGR of medium turbot (initial average weight 59.1 ± 0.24 g) was also improved by the lipid increase, indicating a protein‐sparing effect of lipid.     

五种木本蔬菜的培育技术

简述守宫木、刺五加、辣木、木槿、臭菜5种木本蔬菜的特性,并从种苗培育、苗木种植地选择、种植技术、修剪技术、病虫害防治方面简述了这5种木本蔬菜的人工培育技术。     

蝴蝶兰(满天红品种)的组织培养技术研究

对蝴蝶兰(满天红品种)的组织培养快速繁殖技术进行研究。主要方法以蝴蝶兰(满天红品种)的嫩叶、茎尖、花梗侧芽为外植体,进行蝴蝶兰原球茎诱导、增殖组织培养。结果表明。MS+6.0mg/L 6-BA+0.1mg/L NAA+100mg/L椰乳是诱导蝴蝶兰原球茎形成的最佳培养基,茎尖诱导率达82.5%;MS+1.0mg/L NAA+2.0mg/L 6-BA是蝴蝶兰原球茎增殖的最佳培养基,增殖系数达5.34。在生产上,可采用试管苗生根继代培养的方法进行满天红的快速繁殖。     

Control of tomato bacterial wilt and root-knot diseases by Bacillus thuringiensis CR-371 and Streptomyces avermectinius NBRC14893

Ralstonia solanacearum and Meloidogyne incognita are two soilborne pathogens that cause serious damage and great losses in the production of tomato. For this purpose, a bacterial isolate, Bacillus thuringiensis CR-371, and an actinomyces isolate, Streptomyces avermectinius NBRC14893, were examined for their ability to protect tomato from root-knot nematode and bacterial wilt diseases under glasshouse conditions. Treatment of tomato roots with B. thuringiensis CR-371 and S. avermectinius NBRC14893 followed by challenge inoculation with R. solanacearum and M. incognita significantly decreased disease severity of bacterial wilt alone, root-knot nematode alone, or mixed infection by both pathogens compared to the control. Furthermore, pretreatment of tomato roots with B. thuringiensis CR-371 and S. avermectinius NBRC14893 significantly reduced bacterial proliferation of R. solanacearum both in pathogen alone inoculated plants and in plants co-inoculated with R. solanacearum and M. incognita. In conclusion, our results suggest that the treatment of tomato roots with B. thuringiensis CR-371 and S. avermectinius NBRC14893 simultaneously suppresses bacterial wilt and root-knot nematode diseases. Therefore, B. thuringiensis CR-371 and S. avermectinius NBRC14893 could provide new options for integrated pest management strategies against plant diseases, especially against bacterial-nematode disease complexes that cause synergistic yield losses.     

Identifying causes of death of companion dogs in Japan using data from pet cemeteries

This study aimed to identify the causes of death in dogs that were buried at pet cemeteries. Using data obtained from a questionnaire completed by 5,118 dog owners from 1 April 2016 to 31 March 2017, we estimated the life expectancy and the odds ratio for principal causes of death using multiple logistic regression analysis with potential risk factors as independent variables. The life expectancy determined at birth was 13.98 years. The commonest cause of death was senility. The odds ratios of dying of senility being significantly higher in Labrador Retrievers and Shiba breeds and aged dogs, and significantly lower in Chihuahuas, dogs living indoors and neutered dogs.