Characteristics and thermodynamics analysis ofoxyacetylene flame brazing joint of Cu/Al tubes

以磨盘柿为试材,研究不同液浸处理对冰温贮藏(-0.5～-0.2)℃柿果涩味转变、品质及生理指标的影响。结果表明:在冰温条件下,用2%浓度的NaCl溶液贮藏磨盘柿,可使果实的乙醇含量在贮藏30～45 d内急剧增加,促进可溶性单宁的降低,在贮藏45 d时达到完全脱涩,并可有效延缓果实硬度的下降,具有脱涩和保脆的双重作用,同时可保持相对较高的可溶性固形物和可滴定酸含量,抑制贮藏后期果实丙二醛和膜相对电导率的增加,减缓果实的衰老进程。     

Equine chronic diarrhea: Traditional Chinese veterinary medicine review

Chronic diarrhea is a common problem in equine practice. Herbal medicine has been used for the treatment of gastrointestinal disease in horses for at least one thousand years. In present-day equine practice in China, the most common approach to treat chronic diarrhea is herbal medicine, or a combination of herbal medicine and acupuncture. Three types of chronic diarrhea in horses will be described in detail in term of symptoms, diagnosis and herbal treatments in this paper. Nineteen herbal formulas for treatment of different types of diarrhea will be introduced. Clinical results of each herbal formula will be evaluated. Acupuncture treatment of this problem will also be included.     

Mise en évidence de l'expression du virus leucémogène bovin (BLV) dans les lymphocytes de mouton par une technique d'immunofluorescence utilisant des anticorps monoclonauxDetection of bovine leukemia virus (BLV) in sheep lymphocytes by immunofluorescencence test using monoclonal antibodies

An indirect immunofluorescence (IF) test was developed to detect bovine leukemia virus (BLV) antigen expression in infected sheep lymphocytes, using monoclonal antibodies anti BLV-major envelope glycoprotein gp51. Peripheral blood lymphocytes were cultivated for 48 h in presence of phytohemagglutinin (PHA) (50 μg/ml), and then fixed with acetone. The cells were assayed for the IF test. All experimentally infected sheep were positive with this test.     

丛枝菌根真菌诱导玉米根系形态变化及其机理

以高油115和正大619为实验材料,分别通过盆栽和田间试验研究接种摩西球囊霉和地表球囊霉对玉米根系形态和根系内源生长素含量的影响。结果表明,玉米形成菌根后根系形态明显改变,根条数显著多于对照,并且接种处理与对照间的差异随菌根侵染率的上升而加大,差异极显著。生长60 d时,有菌根的玉米单株总根长度为788.61 cm,根系重量达8.26 g,均显著高于无菌根的对照。根系生长素含量随菌根侵染率上升而增加,并且显著高于不接种的对照。丛枝菌根真菌侵染可以促使玉米根内生长素含量上升,根条数增多,增加吸收面积,促进玉米生长。     

Physical and sensory characteristics of marinated broiler drumsticks treated with lactoperoxidase system and thermal treatment

1. The lactoperoxidase system (LPS) and thermal treatments have been shown to inactivate some micro-organisms in foods. However, further studies are needed to evaluate whether these treatments influenced the physical and sensory characteristics of treated samples. 2. A solution that contained 1% acetic acid and 3% salt with pH adjusted to 4 was developed as a standard marinade. The LPS consisting of 1 microg/ml lactoperoxidase (LP), 5.9 mM potassium thiocyanate (KSCN) and 2.5 mM hydrogen peroxide (H2O2) was added to the marinade for the LPS treatments. 3. In the thermal treatment, samples were heated with the marinade solution at 58 degrees C for 2 min and then marinated at 4 degrees C for 18 h, while the non-thermal treatments were marinated at 4 degrees C for 18 h. 4. For sensory evaluation, flavouring agents including 0.3% black pepper and 0.15% garlic powder were added to the marinade. For physical evaluation, no flavouring agents were added. 5. The results showed that combined LPS and thermal treatment did not impair the physical or sensory qualities of the samples. 6. In conclusion, marinated broiler drumsticks treated with LPS and thermal treatment had acceptable physical and sensory qualities.     

Study of cystine urinary calculi in dogs.

The composition and structure of 48 canine cystine urinary stones were determined by infrared spectroscopy, scanning electron microscopy and electron dispersive X-ray analysis. The infrared analysis showed that about 45% of the specimens were composed of pure cystine. The remainder also contained calcium oxalate (mono and/or dihydrate), magnesium ammonium phosphate hexadydrate (struvite), calcium hydrogen phosphate dihydrate (brushite) and complex urates (ammonium, ammonium potassium and/or potassium enriched ammonium urate). The infrared study of several samples heated at 620 degrees C and 750 degrees C revealed the presence of apatitic calcium phosphate. This compound was difficult to detect in the spectrum of the original samples due to the small proportion of phosphate contained in the calculi and to band overlapping. The examination of a series of selected samples by means of scanning electron microscopy and energy dispersive X-ray analysis complemented the infrared results.     

Use of the ARC/INFO GIS to study the distribution of Lyme disease ticks in an Illinois county

Lyme disease is a bacterial disease of humans and domestic animals transmitted primarily through the bite of the deer tick, Ixodes dammini. Using the ARC/INFO geographic information system (GIS), the distribution of tick vectors can be associated simultaneously with a large number of environmental, biological and demographic factors. The Illinois GIS was used to study the associations of soil type, potential vegetation cover and distance from waterways with tick distributions, and to compare the dispersion patterns of tick-infested and uninfested deer in one northwestern Illinois county. Tick presence was associated with sandy soils, wooded vegetation, and proximity to rivers. Infested deer were clustered around an endemic focus I. dammini, while uninfested deer showed no such clustering. Changes in the spatial distribution of ticks over two years and likely sites for further establishment of ticks were also studied.     

鸡对植酸磷利用率的研究

给3周龄肉鸡、6周龄肉鸡和30周龄蛋鸡分别喂以植酸磷水平为0.18％和0．24％的玉米-豆粕饲粮,研究肉鸡和蛋鸡对饲粮植酸磷的表现消化率。结果表明,蛋鸡植酸磷表现消化率比肉鸡高,而6周龄的肉鸡比3周龄的肉鸡高。