家庭电影梦工场——WinDVD Creator2.0（影音工作室）家庭豪华版

视频和影像一向都是最能打动大家的方式，随着技术和价格时机的成熟，市面上多种多样的视步页多媒体类产品琳琅满目，摄像机、摄像头等等的相信你家或许也有其中一二了。有了前期录影的条件后，那么后期的传输到电脑、制作视频光盘等，大家不妨考虑一下interVideo(特维英)推出的WinDVD creator2．0(影音工作室)豪华版套装。就使用需求上，WinDVD creator2．0分别有三个版本供选择，功能和价格定位由低到高分别是家庭标准版、家庭娱乐版和家庭豪华版，下面评测的是功能最全的家庭豪华版．     

52X／32X高速CD刻录机——SONY CRX230A

在光存储市场上，52X已经不是什么新鲜话题了，虽然并没有消费者带来太大的兴奋。但是毕竟52X才是现在市场的主流，因此各大厂家的52X光存储产品都纷纷就位。这次送测的刻录相——CRX230A，则是SONY家族CD刻录的最高速度的一员，CD读取/刻录和CD-RW的指标分别为52X/52X和32X。     

Efficacy and tolerability of brodimoprim od versus norfloxacin bid in the treatment of bacterial urinary tract infections

The efficacy and tolerability of brodimoprim OD versus norfloxacin BID were studied in patients affected by bacterial urinary tract infections. The study was performed in 203 patients divided into two parallel randomized groups orally given either brodimoprim 400 mg OD on the first day followed by 200 mg OD for 2 days, or norfloxacin 400 mg BID respectively. The efficacy of treatment was evaluated by the bacterial cultures, tolerability, analysis of signs and symptoms, a complete physical examination and from laboratory data. The results showed that brodimoprim and norfloxacin in the majority of patients resulted in a reduction of fever and symptoms caused by the infective process. Of the 103 patients enrolled in the brodimoprim OD group, 99 had a complete course of therapy with a positive outcome. There was only one case of failed treatment and 3 cases which could not be evaluated because of voluntary interruption of treatment. Of the 100 patients treated with norfloxacin BID, 94 completed therapy with a positive clinical outcome and there were 4 cases of treatment failure. Thus the efficacy of brodimoprim OD appears comparable to that of norfloxacin BID in the treatment of urinary tract infections.     

Distribution of thrombosis in patients with symptomatic deep vein thrombosis. Implications for simplifying the diagnostic process with compression ultrasound

BACKGROUND: Two different diagnostic strategies are used to perform compression (real-time) ultrasound for the diagnosis of clinically suspected deep-vein thrombosis. One is to examine the entire proximal venous system from common femoral to distal popliteal vein; the other is a limited examination of only the common femoral and the entire popliteal vein. The latter strategy, which is less time-consuming and requires less expensive equipment, is based on a strong impression from prospective studies using limited compression ultrasound that proximal vein thrombi always involve the common femoral or popliteal vein. This impression, which is supported by the demonstrated safety at long-term follow-up of not treating patients whose limited compression ultrasound is normal at presentation and then repeated within the next week, has not been tested in a formal study. Therefore, we reviewed a large series of venograms performed in consecutive patients with clinically suspected venous thrombosis to determine the distribution of venous thrombosis in symptomatic patients. METHODS: Venograms were performed using 150 mL of radiographic contrast material. Before the study, a panel of experts agreed on the standardized criteria for the assessment of venograms. Venograms were adjudicated blindly for the presence of deep vein thrombosis and to determine the distribution of proximal vein thrombosis and isolated calf-vein thrombosis, the size of proximal thrombi, and whether they were occlusive or nonocclusive. Subsequently, the duration of symptoms was related to the venographic findings. RESULTS: Five hundred sixty-two venograms from consecutive patients with a first episode of clinically suspected deep vein thrombosis were adjudicated. Of these, 20 (3.6%) were inadequate for interpretation. In the remaining 542, venous thrombosis was demonstrated in 189 instances (prevalence, 35%; 95% confidence interval, 31% to 39%) and were located in the proximal veins in 166 (88%; 95% confidence interval, 82% to 92%) venograms. Isolated calf-vein thrombosis was present in the remaining 23 (12%; 95% confidence interval, 8% to 18%) venograms. Proximal with concurrent calf thrombosis was detected in 164 (99%) of the 166 patients. Proximal thrombi involved only the popliteal vein in 16 (10%); the popliteal and superficial femoral veins in 70 (42%); and the popliteal, superficial, and common femoral vein in eight (5%); whereas thrombi involving the entire proximal deep venous system were detected in 58 (35%) venograms. Isolated thrombosis of the superficial femoral, common femoral, and iliac vein was not observed. Proximal venous thrombi were occlusive in 146 (88%) patients. No relation between the duration of symptoms and the extent or the occlusiveness of venous thrombi could be demonstrated. CONCLUSIONS: Most symptomatic patients have extensive occlusive proximal vein thrombosis at the time of presentation. Thrombi isolated to the superficial femoral or iliac vein were not observed in this large sample of consecutive patients. Our data support the use of the relatively simple, inexpensive, and rapid compression ultrasound method that limits the examination of the proximal veins to the common femoral and popliteal veins.     

Accuracy of clinical assessment of deep-vein thrombosis

The clinical diagnosis of deep-vein thrombosis is generally thought to be unreliable. From experience, we hypothesised that this widely held view might be incorrect. We developed a clinical model and prospectively tested its ability in three tertiary care centres to stratify symptomatic outpatients with suspected deep-vein thrombosis into groups with high, moderate, or low probability groups of deep-vein thrombosis. We evaluated our clinical model in combination with venous ultrasonography to determine the potential for an improved and simplified diagnostic approach in patients with suspected deep-vein thrombosis. All patients were clinically assessed to determine the probability for deep-vein thrombosis before they had ultrasonography and venography. All tests were performed and interpreted by independent observers. In 529 patients, the clinical model predicted prevalence of deep-vein thrombosis in the three categories: 85% in the high pretest probability category, 33% in the moderate, and 5% in the low category. There was no statistical difference in the performance of the model in the three centres. The model demonstrated excellent interobserver reliability (Kappa = 0.85). There were important differences with ultrasonography between the high and low pretest probability groups for both positive predictive values (100% (95% CI, 94-100%) vs (63% [35-85%], respectively). Thus, use of the clinical model combined with ultrasonography would decrease the number of false positive and negative diagnosis if venography were done when the ultrasound result and pretest probability were discordant. The diagnostic process could be simplified by excluding those patients with low pretest probability and normal ultrasound results from serial testing.     

价廉物美——友基AQ3320Z 300万像素数码相机

数码相机之所以风行，一来是为大家带来多种多样的便捷性，二来是其产品的定位十分广，各个价位几乎都有十分丰富的产品线供选择。这款送测的AQ3320Z 300万像素数码相机，是友基推出的第一款数码相机，以RMB 1280这样诱惑的价钱出现，定位明显是以性价比优势主攻一般家用市场。     

Short-Term Stability of Whole Blood Polyunsaturated Fatty Acid Content on Filter Paper During Storage at −28 °C

Finger or heel‐pricked blood sampling for fatty acid analysis is suitable especially in newborn infants where blood sampling is difficult and phlebotomy for research can be unethical. The aim of this study was to evaluate dried blood long chain polyunsaturated fatty acids (LC‐PUFA) stability during storage at ?28 °C. We collected 12 blood cord samples that were analyzed immediately after blood drawing, with and without drying the blood on filter paper. Dried samples were then analyzed 7 days and 1, 3, and 6 months after collection. Butylated hydroxytoluene was added to all samples. Fatty acid composition and ¹³C enrichment were measured by gas chromatography and by gas chromatography‐isotope ratio mass spectrometry, respectively. The fatty acid composition, expressed in mol%, of the major LC‐PUFA at day 7 was not statistically different from time 0, however lower values were found by the first month of storage. The ¹³C enrichment of 20:4n‐6 and 22:6n‐3 did not differ during the whole study period. LC‐PUFA analysis from dried umbilical cord blood in neonates should be performed within a week, major losses of LC‐PUFA occur afterwards. However, fatty acids obtained from dried blood maintain their ¹³C enrichment value for up to 6 months and thus these samples are suitable for natural abundance isotopic studies.     

大器已成——BenQ FP783 17英寸12毫秒液晶显示器

正所谓“水涨船高”，那么退潮了，船自然也就低了现在电脑各种硬件的价格都相对降下来了，装机的价钱自然也下降了．而省下来的一笔钱．不少的朋友都已把它转投到虽然价格较高．但更健康的液晶显示器上。然而在去年15英寸16毫秒液晶显示器的潮流之后．以目前的情况看来，04年液晶显示器的新标准相信就是17英寸和12毫秒，     

An unusual presynaptic action of Bothrops insularis snake venom mediated by phospholipase A2 fraction

A phospholipase A2-containing fraction was isolated from the venom of Bothrops insularis by a combination of gel filtration on Sephadex G-150 and ion exchange chromatography on DEAE-Sephadex. Peak IV of the latter chromatography containing all of the phospholipase A2 (PLA2) activity, was assayed on isolated neuromuscular preparations. In the mouse phrenic nerve-diaphragm incubated in Tyrode at 37 degrees C, the PLA2 fraction produced an initial increase in the twitch tension and in the frequency of the mepps, followed by a dose-dependent, irreversible blockade. The replacement of 1.8 mM Ca2+ by 4 mM Sr2 inhibited the neuromuscular blocking effect of the fraction. In the chick hiventer cervicis preparation incubated with Krebs solution at 37 degrees C, the PLA2 fraction induced blockade but did not affect the response to acetylcholine and K+, excluding the involvement of post-synaptic and direct muscular effects. A low temperature (18-22 degrees C) incubation prevented the neuromuscular effect from developing. These results suggest that the PLA2-containing fraction acts predominantly at presynaptic sites at the neuromuscular junction. This fraction also accounts for most of the pharmacological effects of the crude venom.