不同能量水平对雏鹅卵黄囊吸收利用的影响     

王志跃  陈伟亮 《中国家禽》2003,25(24):11-12

试验以雏鹅为对象,研究了不同能量水平对雏鹅卵黄囊吸收利用的影响。结果表明,在59时龄以内80%以上的卵黄囊营养被吸收利用,说明这一时期是卵黄囊吸收利用的主要时期。能量水平对卵黄囊营养的吸收与利用有一定的影响,低能日粮有加速卵黄囊吸收与利用的趋势,但各采食组之间差异不显著(P>0.05)。  相似文献   

柑橘类果实汁胞的红色现象及其呈色色素   总被引：10，自引：0，他引：10  

徐娟  邓秀新 《果树学报》2002,19(5):307-313

柑橘类果实中不乏汁胞为红色类型者,如红肉葡萄柚(Citrus paradisii Macf.)的粉红色是番茄红素所致,血橙(C.sinensis L.)的血红色来源于花青素,此外,还有红色的红江橙(C.sinensis L.)、橙红色的元红(C.reticulata Blan-co)和紫红色的五布红心柚(C.grandis L.)等,它们因色泽鲜艳而具备特殊的市场潜力,但呈色色素尚未见报道。在符合审美观的同时,红色汁胞品种还具有特殊的营养价值,如类黄酮、类胡萝卜素等色素富集可软化血管、抗癌、抗氧化及消除体内自由基等。综合有关文献,首次将国内外主要红色汁胞柑橘品种依宽皮柑橘、甜橙、柚、葡萄柚及杂柑等分类进行综述,分析可能的呈色色素,阐明导致红色性状产生的两类色素—花青素、类胡萝卜素生物合成途径  相似文献   

Expression of vascular endothelial growth factor in chronic inflammatory mucosa of lacrimal sac     

ZHANG Tao  WANG Ji-qun  WANG Li-hua  SHAN Yan-chun 《园艺学报》2004,20(3):459-461

AIM: To study the expression of vascular endothelial growth factor (VEGF) in inflammatory mucosa of lacrimal sac. METHODS: Immunohistochemical S-P method was used to examine the expression of VEGF in the mocusa from 12 patients with chronic dacryocystitis and 8 volunteers. RESULTS: The positive rates of VEGF expression in different parts of the mocusa were: basal lamina: 44.3%±7.6％; surface epithelium: 16.9%±4.6％; connective tissue: 15.2%±4.9％, all normal mocusa of 8 cases were negative. There was a significant difference between the two groups (P<0.01), a significant difference among each part of the chronic inflammatory mocusa of lacrimal sac. CONCLUSION: VEGF may play an important role in hyperplasia of inflammatory mucosa of lacrimal sac.  相似文献   

陆地棉×亚洲棉胚胎在培养条件下的发育研究   总被引：4，自引：0，他引：4  

张献龙  刘金兰  孙济中 《华中农业大学学报》1988,(3)

离体培养陆地棉与亚洲棉杂种胚珠,并以陆地棉自交为对照。观察结果表明,杂种胚胎表现出明显的生长优势,能顺利地通过胚胎发育的各个时期而达成熟胚。其原因是,胚乳游离核迅速解体,珠心组织也随之解体,而不形成胚乳细胞并使胚囊腔迅速扩展,使杂种胚有足够的营养源,并提供了足够的生长空间。自交胚胎的生育速度远不及杂种胚,发育受抑,尤其是球形胚到心形胚的时期较长。  相似文献   

Expression of E‐cadherin in canine anal sac gland carcinoma and its association with survival*     

G. A. Polton  M. J. Brearley  L. M. Green  T. J. Scase 《Veterinary and comparative oncology》2007,5(4):232-238

The objective of this study was to determine whether an association could be demonstrated between survival and the expression of the adhesion molecule E‐cadherin by the neoplastic cells in a group of dogs with anal sac gland carcinomas (ASGCs). Archived formalin‐fixed, paraffin wax‐embedded primary tumour specimens were obtained for 36 cases of canine ASGC with known clinical management and survival data. Immunohistochemical methods were used to evaluate E‐cadherin expression by the neoplastic cells and data were evaluated for an association between E‐cadherin expression and survival. On univariate analysis, the median survival time for cases with tumours expressing E‐cadherin in more than 75% of cells was significantly greater than that for cases with tumours expressing E‐cadherin in fewer than 75% of cells (1168 versus 448 days, P = 0.0246). Both E‐cadherin expression and presence or absence of distant metastases were significantly associated with survival on multivariate analysis. This study demonstrates that expression of E‐cadherin at the cytoplasmic membrane in canine ASGCs is variable and potentially predictive of survival.  相似文献   

Diagnosis of disseminated adenocarcinoma by bone marrow aspiration in a dog with leukoerythroblastosis and fever of unknown origin     

Henson KL  Alleman AR  Fox LE  Richey LJ  Castleman WL 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》1998,27(3):80-84

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Effects of CSF-1,IL-1α on CSF-1 receptor gene expression in rat dental follicle cells     

GU Hai-jing  LING Jun-qi  WANG A-dan 《园艺学报》2007,23(8):1602-1605

AIM: To study the effects of colony stimulating factor(CSF-1) and IL-1α on CSF-1 receptor mRNA levels and to determine if the autocrine effect is inhibited through the CSF-1 receptor.METHODS: Rat dental follicle cells were cultured in vitro.The effects of different concentrations of CSF-1 and IL-1α on CSF-1 receptor gene expression were detected by means of RT-PCR.RESULTS: High concentrations of CSF-1 reduced the gene expression of the CSF-1 receptor. IL-1α had no effects on CSF-1 receptor mRNA levels.CONCLUSION: High concentrations of CSF-1 inhibit the expression of CSF-1 receptor.IL-1α has no effect on the expression of CSF-1 receptor mRNA.  相似文献   

The progamic phase and seed formation in Armoracia rusticana     

K. Winiarczyk    J. Bednara 《Plant Breeding》2008,127(2):203-207

The progamic phase is a period of specific interaction between the male gametophyte and the pistil tissues and is very important for proper seed development in plants. The aims of this study were to investigate the events during the progamic phase in Armoracia rusticana, to examine a plant’s capability of sexual reproduction and to obtain vital seeds under natural conditions. There were very few pollen grains on the stigmas at anthesis stage. The incompatibility reaction between the stigma cells and pollen grains was observed by using fluorescence microscopy. A series of ovary cross‐sections revealed a high accumulation of Periodic Acid Schiff (PAS)‐positive globules in all the embryo sacs. About 33% of ovules in the ovary were fertilized, but only 3% of them were able to germinate into seedlings.  相似文献   

Update on Adrenalectomy     

《Veterinary Clinics of North America: Small Animal Practice》2022,52(2):473-487

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Embryonic expression of UCP2 in rainbow trout (Oncorhynchus mykiss)     

I. Coulibaly  S. A. Gahr  J. Yao  C. E. Rexroad III 《Fish physiology and biochemistry》2006,32(3):249-253

Uncoupling proteins are mitochondrial anions transporters that dissociate respiration from ATP synthesis through proton leaks. Uncoupling protein 2 reportedly plays a role in several physiological processes such as energy partitioning, nutrition, and fatty acid metabolism. The mRNA expression of rainbow trout UCP2 genes (UCP2A and UCP2B) was monitored during embryogenesis and early larval development. Both genes were recruited early and displayed similar steadily decreasing patterns from fertilization until hatching. The expression of UCP2A and UCP2B appeared significantly differentiated after hatching and during the yolk sac absorption, with UCP2A displaying higher expression. We suggest that UCP2 expression profiles in the rainbow trout embryo could be associated with the utilization of lipids as a source of energy during development.  相似文献