黄腐酸有机-无机复混药肥在茄子栽培上的应用效果

研究了黄腐酸有机-无机复混药肥在茄子栽培上的应用效果,试验设常规化肥(处理Ⅱ)、低量黄腐酸有机-无机复混药肥(处理Ⅲ)、中量黄腐酸有机-无机复混药肥(处理Ⅳ)、高量黄腐酸有机-无机复混药肥(处理Ⅴ)4个施肥处理,以及不施肥处理Ⅰ为CK,分别对茄子经济性状、品质和产量指标进行调查分析。结果表明:各施肥处理Ⅱ、Ⅲ、Ⅳ、Ⅴ的茄子植株经济性状、果实经济性状、品质、产量均优于不施肥处理Ⅰ(CK),各施肥处理中,高量黄腐酸有机-无机复混药肥的肥效最为显著,可有效促进茄子优质高产,并实现化肥减施,在茄子生产栽培上可进行推广应用。

生物无机化学的新动向

介绍了近几年生物无机化学发展的新动向,特别是各种与DNA,RNA相结合的金属调节蛋白,在核酸基因表达及调控中的作用。金属蛋白与金属酶的研究,由于基因工程、金属络合物探针和肽链的人工合成等各种新思想、新方法的引入,并且把各种金属蛋白反应作为生物体中的一类反应进行研究(例如:生物体的电子传递反应,金属离子在生物分子间的转移反应,小分子加合反应等等),使研究进入一个新的台阶。

Wavy Distribution of Trace Elements in Phytolacca Samples from Different Areas

To study the distribution of 25 elements, i.e. Be, Cd, Ce, Cr, Cu, Dy, Er,Eu, Gd, Ge, Ho, La, Lu, Mo, Nd, Pb, Pr, Sm, Sr, Tb, Tl, Tm, Y, Yb and Zn in Phytolacca, atraditional Chinese medicinal herb, collected from nine areas of P. R. China. Methods Twenty-fiveelements in Phytolacca including essential elements, toxic elements and rare earth elements intraditional Chinese medicinal herbs from different areas were analyzed by ICP-MS. Results The 25elements in Phytolacca were determined by ICP-MS under optimized conditions. The detection limitswere 0.003 -0.71 ng·mL^(-1). The recoveries were 88% - 118% . The relative standard deviations ofthe measurements were 1.7% - 13.3%. Conclusion The determined concentrations of elements inPhytolacca acinosa Roxb vary from one area to another; however, the distribution tendency ofelements in all the samples is similar. The distribution tendency of rare earth elements inPhytolacca acinosa Roxb is consistent with that in nature.

Effects of Different Diuretics on Water Drinking Amount, Urination Volume and Related Blood Indices of Sheep Fed with Cottonseed

[Objective] This study aimed to investigate the effects of three kinds of diuretics on the water drinking amount and urination volume of sheep fed with cottonseed hulls. [Method] The method of self-control was adopted. Five two-year-old male Kazak sheep about 40 kg which never had intake of the feeds containing gossypol were selected. The experiment was divided into five periods, namely the control period, a period with the supplement of 300 mg/d of hydrochlorothiazide, a period with the supplement of 200 mg/d of hydrochlorothiazide, a period with the supplement of 350 mg of GY-01 and a period with the supplement of 200 mg of GY-01. The sheep were fed with the concentrate and the cottonseed hulls in the control period, and corresponding diuretics were supplemented in the rest four periods. The water drinking amount, urination volume and the contents of the hormone and ion in the blood were determined in each period. [Result] After 350 mg GY-01 was supplemented, the water drinking amount of each sheep had an increase of 60.14% compared with that of the sheep in the control period and the urination volume was 2.67 times of that of the latter, and the differences were both significant （P0.01）. The antidiuretic hormone declined by 32.59% compared with that of the sheep in the control period, with the significant difference （P 0.05）. The adrenocorticotropic hormone content increased by 81.93% compared with that of the sheep in the control period and the difference was significant （P0.01）. An increase of 28.04% （P 0.05） and 39.39% （P 0.01） was found in the contents of serum potassium and phosphorus respectively compared with that of sheep in the control period. [Conclusion] The diet with supplement of GY-01 can increase the urination volume of livestock fed with the cottonseed hulls, and the most appropriate supplement amount is 200 mg GY-01.

Applications of aptamers for chemistry analysis, medicine and food security

Since aptamer and its in vitro selection process called SELEX were independently described by Ellington and Gold in 1990, extensive research has been undertaken and numerous isolated aptamers for various targets have been applied. Aptamers can bind to a wide range of targets that include small organic molecules, inorganic compounds, haptens and even whole cells with high binding affinity and specificity. Aptamers for a wide range of targets have been selected currently. In addition, aptamers are thermo stable and can also be regenerated easily within a few minutes denaturation, which makes them easy to store or handle. These advantages make aptamers extremely suitable for applications based on molecular recognition as analytical, diagnostic and therapeutic tools. In this review, the recent applications of aptamers for chemistry analysis, medicine and food security, along with the future trend will be discussed.

Recent advances in the development of organic photothermal nano-agents

Recently, photothermal therapy （PTT） has attracted tremendous attention because of its high efficacy in tumor ablation and minimal damage to normal tissues. While many inorganic nanomaterials, especially various gold nanostructures and nanocarbons, have been extensively explored for near-infrared （NIR） light triggered PTT in the past decade, a variety of organic photothermal agents have also emerged in recent years, aiming at replacing their inorganic counterparts which usually are not biodegradable. In this mini-review, we will summarize several typical classes of recently developed NIR-absorbing organic PTT nano- agents, which include NIR dye-containing micelles, porphysomes, protein-based agents, conjugated polymers, and organic/inorganic nanocomposites. The development of imaging-guided PTT and combination therapy will be introduced as well. Finally, the perspectives and challenges in the future development of PTT will be discussed.