Intraruminal pressures in a cow with rumen indigestion     

E Boldt  H Johansen 《Monatshefte für Veterin?rmedizin》1970,25(23):906-907

  相似文献   

Telemetric monitoring of rumen activity in cattle. 1. Material and experimental method     

H Johansen  E Boldt 《Monatshefte für Veterin?rmedizin》1970,25(23):897-901

  相似文献   

JEVS in 2007     

Ed Squires  Editor 《Journal of Equine Veterinary Science》2007,27(2):50

  相似文献   

Fruits of our labour: contribution of commercial baobab (Adansonia digitata L.) fruit harvesting to the livelihoods of marginalized people in northern Venda, South Africa     

Sarah M. Venter  Ed. T. F. Witkowski 《Agroforestry Systems》2013,87(1):159-172

Baobabs (Adansonia digitata) provide products, mainly bark, leaves and fruit, which are used for subsistence purposes and traded to generate cash. Recently, demands for baobab fruit derivatives on the global organic market, namely pulp and seed oil, have increased rapidly, leading to concerns that this may have negative impacts on subsistence users, particularly in areas where there is an existing high dependence on these products, such as West Africa. In contrast, in southern Africa baobab fruit are probably ‘underutilized’ and commercialization would help reduce poverty. This study evaluated the direct-use (subsistence) and income (cash) value of baobab fruit on the livelihoods of baobab fruit harvesters in South Africa. Harvesters were mostly women (98 %), many of whom were unemployed (98 %) and uneducated (70 %). The majority (68 %) received social grants and were involved in informal occupations (55 %), which contributed 35 and 18 % to total annual income respectively. The trade and direct-use value of non-timber forest products contributed 14 and 33 % to annual income, of which, baobab fruit made up 38 and 4 % respectively. Baobab fruit was the only non-timber forest product that had a higher income value (4×) than direct-use value. Cash earned was used to buy food (73 %) and invest in small businesses, suggesting a move from subsistence to cash economy. It is suggested that commercialization of baobab fruit will have far-reaching benefits; and that secured access to trees and investment in local beneficiation will further increase the value of the resource for many marginalized people in southern Africa.  相似文献   

The UVA and aqueous stability of flavonoids is dependent on B-ring substitution     

Maini S  Hodgson HL  Krol ES 《Journal of agricultural and food chemistry》2012,60(28):6966-6976

Flavonols such as kaempferol and quercetin are believed to provide protection against ultraviolet (UV)-induced damage to plants. Recent in vitro studies have examined the ability of flavonols to protect against UV-induced damage to mammalian cells. Stability of flavonols in cell culture media, however, has been problematic, especially for quercetin, one of the most widely studied flavonols. As part of our investigations into the potential for flavonols to protect skin against UV-induced damage, we have determined the stability of a series of flavonols that differ only in the number of substituents on the B-ring. We measured the stability of these flavonols over time to UVA radiation, Dulbecco's modified Eagle's medium (DMEM), and Dulbecco's phosphate-buffered saline (DPBS) using high performance liquid chromatography with UV detection (HPLC-UV). The identification of the breakdown products of flavonols was accomplished by using a hybrid quadrupole linear ion trap mass spectrometer coupled with liquid chromatography. Tandem mass spectrometric analysis (MS/MS) of flavonol photoproducts was confirmed by comparing with the known standard samples. We have determined that flavonol stability decreases with increasing B-ring substitution, suggesting that future investigation of potential photoprotective flavonols will need to be cognizant of this trend.  相似文献   

支持完整性决策的数据管理     

John Beets  Ed Wiegele  Stuart Clouston 《油气储运》2005,24(Z1)

大多数管道的运营、维护和其它设备管理部门,采用一系列各自独立的数据资源和应用程序来管理管道的完整性、维修和安全.将各个独立的数据整合成一个单一的、相互关联的数据管理系统可以提供很多重要的好处.然而,在给定管道早期投资的情况下,评价用于建立一个包含功能强大的数据采集程序在内的新系统的成本是非常困难的.采用静态的和独立的维护性数据的专用风险管理软件被作为一种快捷的、低成本的替代选择,以此来满足规章制度所规定的必须遵从的行业要求.通过开发传统数据等方法,以最小的启动成本来实现阶段性的完整性数据管理.  相似文献   

动物遗传资源:我们为什么要保护以及怎样去保护     

Jane Toll  Luiz Iniguez  Ed Rege 《中国禽业导刊》2009,26(23):19-19

一多样性起源 当今我们所提到的动物遗传资源其历史起源于1～1．2万年前新石器时代的农业革命时期,世界上的多个地区分别兴起了农业革命,除了澳洲以外,这场革命遍布了其他所有的有人类居住的大陆。  相似文献