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The objective of this study was to compare carcass composition and meat quality traits in the longissimus dorsi and biceps femoris muscles in the Hyla, Champagne and Tianfu Black rabbit breeds. ... Tianfu Black rabbits had the heaviest head, skin, thoracic viscera and commercial carcass percentage (p<0.05). In addition, Tianfu Black had the highest pH0 h value, followed by the Champagne and Hyla breeds (p<0.01) in the longissimus dorsi and biceps femoris muscles. Tianfu Black had a higher a* (0 h and 24 h) than the other two breeds in both longissimus dorsi and biceps femoris muscles (p<0.05). The Hyla, Champagne, and Tianfu Black breeds showed a similar pattern of differences for meat quality traits (pH, L*, a* and b*) measured in fresh meat (0 h) and meat stored for 24 h. Hyla had the highest IMF values of the three breeds (p<0.01). The lower intramuscular fat of Tianfu Black and Champagne rabbits gives them an advantage over Hyla rabbits among most consumers seeking lean rabbit meat. več

组织、器官的衰老通常被认为是一个不可逆转的过程,但近期研究发现,通过联体共生模型或直接将年轻个体血液静脉注射到老年个体体内的方法,具有一定的对抗组织或器官衰老的作用。目前,相关研究已在干细胞衰老、心脑血管疾病、老年骨折愈合、骨骼肌细胞衰老等方面取得了诸多进展。联体共生（parabiosis）模型最初起源于19世纪,距今已有超过150年的历史,它是通过外科手术的方式,将两只动物连接在一起从而建立起共同的循环系统。作为沟通不同个体间循环系统的有效方式,联体共生模型具有广泛的应用前景。目前,联体共生模型所面临的主要挑战是联体后个体出现的＂联体病＂问题,＂联体病＂也被称为＂联体中毒＂,它与手术过程无关,而是在联体手术两周后,伴随体外循环建立和血管再通而出现的一种状况,现有研究还不能解释这种现象出现的原因。虽然目前联体共生模型在世界上的应用还并不是十分广泛,但可以预测,联体共生模型必将为老年病的研究做出巨大的贡献。本文将从＂联体共生模型＂的历史、进展、挑战及前景几个方面进行综述。

The TCM (traditional Chinese medicine) transdermal plaster (also known as "cataplasma") are flexible adhesive patches used for treatment of any pain, resulted from arthritis, sprain and bruise, ... tendovaginitis, lumbar spine protrude, neuralgia, hyperosteogeny ache, abdominal discomfort and metastatic cancer, etc. This paper provides a review of the TCM transdermal agents for pain palliation and the preparation of these herbal patches.l patches. več

R329.28; ... 骨髓脂肪组织是由脂肪细胞在骨髓腔内累积所形成.骨髓脂肪细胞主要由骨髓间充质干细胞分化生成,并且认为其优先于成骨细胞生成.研究表明,骨髓脂肪组织与绝经后骨质疏松症、衰老型骨质疏松症、糖尿病导致的骨质丢失等均有密切联系.骨髓脂肪细胞分化增加会导致成骨细胞分化减少,同时也会通过分泌相关因子调节成骨细胞与破骨细胞的分化及其功能,包括PPARγ、脂联素、内脂素、抵抗素、Omentin-1等.笔者就骨髓脂肪组织调控成骨细胞和破骨细胞生成及其功能研究进展做一综述. več

R329.28; ... 破骨细胞是起源于骨髓单核细胞的多核细胞,成熟的破骨细胞位于骨小梁和骨皮质内表面.骨组织稳态受成骨细胞产生的骨形成和破骨细胞引起的骨吸收之间的平衡调节.然而在病理状态下,多种因素,包括肿瘤坏死因子超家族配体和炎性蛋白质等都促进破骨细胞的形成,使骨代谢失去平衡,导致骨组织过度吸收和过度形成.破骨细胞过度活化常见于骨质疏松症,自身免疫性关节炎等骨代谢疾病.破骨细胞功能障碍同样会导致如石骨症等疾病.因此,破骨细胞是骨代谢疾病预防和治疗方面的重要靶点.随着研究的深入,近年来有关破骨细胞的研究有了新的发现.本文就破骨细胞最新研究进展做一综述. več

R363; 绝经后骨质疏松症(postmenopausal ... osteoporosis,PMOP)是指女性绝经后卵巢内分泌功能失调衰退,导致雌激素水平下降,从而导致破骨细胞的骨吸收大于成骨细胞的骨形成的一种代谢性疾病.骨质疏松症没有特异性的临床表现,直到轻微的创伤诱发骨折时才会引起重视,所以预防骨质疏松症是临床工作的重中之重.目前有很多研究报道了骨质疏松症发生发展的机制,在机体内雌激素的缺乏引起炎症因子与MicroRNA激活,从而引起RANKL-RANK-OPG轴的紊乱,引起骨质流失.同时雌激素充当抗氧化剂来保护骨,抵抗氧化应激.本文就绝经后骨质疏松症的发生机制做一综述. več

碩士 國立東華大學 應用數學研究所 84 Abstract : For a given tree T and a transition probability p(x, y) on a state space G, a tree-indexed Markov chain is defined as follows: Given a particul-ar state x in G at a ... particular vertex in T, independent Markov chains are pe-rformed according to p(x,y) on each branch from such vertex. Our focus is on the various recurrences of such walks , and to discuss the difference between regular Markov chains and tree-indexed Markov chains. In this thesis we intro-duce spectral radius,Hausdorff dimension,Minkowski and packing dimensions anddetermine if such tree random walks are recurrent on a given state space acc- ording to the positiveness of such quantities. več