新型酸性染料

瑞士Bezema公司新推出酸陛染料Bemacid系列和金属络合染料Bemaplex系列，主要用于聚酰胺和羊毛纤维染色。这些三元混合染料在染色动力学和亲和力方面达到完美匹配，有均匀染深性。用这些染料可以获得高湿牢度艳丽色，而且便于在两系列染料中选择多只染料拼混，以适应不同产品染色要求。该两系列染料按吸色率、固着率、迁移力、拼混性、色档遮盖性和色牢度等染色性能进行分组。该染料用途包括：外衣、袜品、泳装、内衣和高色牢度运动服，也可用于地毯和技术类纺织品。     

新型酸性染料

瑞士Bezema公司新推出酸性染料Bemacid系列和金属络合染料Bemaplex系列，主要用于聚酰胺和羊毛纤维染色。这些三元混合染料在染色动力学和亲和力方面达到完美匹配，有均匀染深性。用这些染料可以合理成本获得高湿牢度艳丽色，而且便于在两系列染料中选择多只染料拼混，以适应不同产品染色要求。该两系列染料按吸色率和固色率、迁移力、拼混性、色档遮盖性和色牢度等染色性能进行分组。该染料用途包括：外衣、袜品、泳装和内衣，高色牢度运动服，也可用于地毯和技术类纺织品。     

W-BS型分散染料的开发与性能

基于市场上在用的竞品A系列高牢度分散染料，研发出一套新的W-BS系列分散染料。分析了分散染料在热处理时的温度、时间对涤纶织物布面效果及色牢度的影响。结果表明：W-BS系列染料在具有A系列高水洗牢度同时，改善了染料的热迁移性。     

科莱恩公司新染料

科莱思公司新推活性染料系列Drimarene HF-CD，适用于纤维素纤维连续染色，它包括三只染料Drimarene黄HF-CD、Drimarene红HF-CD和Drinmrenee蓝HF—CD。用该系列染料不易发生头梢色差和二边色差，有极高染浴稳定性。该染料不仅提高连续染质量，而且能保证染色小样和批量染色的一致性。此外，有优异耐晒色牢度，适用于极浅色的染色。科莱恩新推出另一只有极高耐晒牢度的活性染料Drimarene红HF-6BL cdg（连续染），作为一种三原混合染料，与现有三原色染料CL和HF系列有极高拼混性能．可以在耐晒色牢度要求高的染色中代替其他三原色染料，它既可用于连续染，也可用于浸染。     

山德兰MF染料：——论山德兰MF染料性能及匹染工艺

山德兰ＭＦ染料──论山德兰ＭＦ染料性能及匹染工艺山德兰ＭＦ（ＳＡＮＤＯＬＡＮＭＦ）染料属瑞士科莱恩公司（原瑞士山德士公司）的毛用酸性染料。它是以该公司的弱酸性染料系列及耐缩绒染料系列为母体基，经过精密筛选、重新组合、制作的一类具有优秀的勾染性及坚牢度...     

成都温江区祥和化工

本厂是一家皮革化工专业生产厂家，立足四川，辐射全国。公司产品有加脂剂系列、涂饰剂系列、复鞣剂系列、助剂系列、颜料膏系列、染料系列等约60种产品。     

成都温江区祥和化工

本厂是一家皮革化工专业生产厂家，立足四川，辐射全国。公司产品有加脂剂系列、涂饰剂系列、复鞣剂系列、助剂系列、颜料膏系列、染料系列等约60种产品     

一种用于羊毛的新染料—汽巴Lanasol CE染料

一种新的羊毛染料—— L anasol CE染料有效地用一种不含金属的活性染料替代铬媒染料。它的范围包括三铬酸盐系列加上黑、海军蓝染料 ,它们可以自身使用或和其他 L anasol系列染料一起使用。1　系列染料的特性　　这种用于羊毛染色而特别设计的染料 ,具极好的湿牢度、良好的耐光牢度、高价值的效果使这种染料特别适合于染深色泽 ,用于替代铬媒染料。这种染料具有很高的竭染性、固色率和匀染性 ,具有很好的重现性。它们完全符合 Oeko Tex1 0 0的标准要求。这一新的系列染料用于上染深色泽 ,用于替代铬媒染料具有很好的经济效益。2　应　用…     

科莱恩公司新染料

科莱恩公司新推出活性染料系列DrimareneHF-CD，适用于纤维素纤维的连续染色，它包括Drimarene黄HF-CD、Drimarene红HF-CD和Drimarenee蓝HF-CD三只染料。用该系列染料不易产生头梢色差和二边色差，有极高的染浴稳定性。该染料不仅能提高连续染色的质量，而且能保证染色小样和批量染色的一致性。此外，有优异的耐晒色牢度，适用于极浅色染色。     

湖南大学发明染料嵌入纳米颗粒及其制备方法

最近，湖南大学王柯敏等人申请的一项关于吲哚类菁染料嵌入的硅壳荧光纳米颗粒及其制备方法的专利获得通过。本发明公开了一种吲哚菁染料（Cy染料系列）嵌入的硅壳荧光纳米颗粒及其制备方法，旨在提供一种工艺简单、物理性质稳定，并能显著提高染料的包埋效率的硅壳荧光纳米颗粒及其制备方法。吲哚菁染料（Cy染料系列）嵌入的硅壳荧光纳米颗粒特征为：为核壳型纳米颗粒，其壳成分为二氧化硅，内核材料为结合了免疫球蛋白的吲哚类菁染料。其制备方法是以人体免疫球蛋白为载体，标记上吲哚菁染料后，被包埋到核壳型的纳米颗粒中，采用反相微乳液法制备了在近红外区可产生荧光的纳米颗粒。     

Protective effect of Staphylococcus chromogenes infection against Staphylococcus aureus infection in the lactating bovine mammary gland

The susceptibility of uninfected or Staphylococcus chromogenes-infected quarters to challenge with Staphylococcus aureus was measured. Seventeen S. chromogenes-infected quarters were challenged by infusion of S. aureus into the teat sinus; 47% (8 of 17) became infected and all 18 uninfected quarters challenged similarly with S. aureus became infected. No differences in daily milk yield were seen between uninfected quarters and S. chromogenes-infected quarters prior to S. aureus infusion. Postinfusion, milk yield for S. aureus-infected, S. chromogenes-infected, and S. chromogenes- and S. aureus-infected quarters differed. Somatic cell counts were elevated in S. chromogenes-infected quarters compared with uninfected quarters prior to S. aureus infusion. Somatic cell counts were not different between S. aureus- and S. chromogenes- and S. aureus-infected quarters postinfusion, but were different for S. chromogenes-infected quarters. Chloride concentrations in S. chromogenes- and S. aureus-infected quarters were different from either S. aureus-infected or S. chromogenes-infected quarters. Staphylococcus aureus colony forming units in quarters with preexisting S. chromogenes infections were lower than S. aureus colony-forming units in previously uninfected quarters. Possible protective mechanisms induced by S. chromogenes against superinfection by S. aureus are discussed.     

Reducing dry period length to simplify feeding transition cows: milk production, energy balance, and metabolic profiles

Sixty-five Holstein cows were used to evaluate management schemes involving altered dry period (DP) lengths on subsequent milk production, energy balance (EB), and metabolic variables. Cows were assigned to one of 3 treatments: traditional 56-d DP (fed a low-energy diet from -56 to -29 d and a moderate energy diet from -28 d to parturition; T), 28-d DP (continuously fed a high energy diet; S), and no planned DP (continuously fed a high energy diet; N). Prepartum DM intake (DMI), measured from 56 d prepartum through parturition, was lower for cows on the T treatment than for cows on the S treatment and was higher for cows on the N treatment than for cows on the S treatment. There were no differences in prepartum plasma glucose, and beta-hydroxybutryric acid; there was a treatment by time interaction for prepartum plasma nonesterified fatty acid (NEFA). There was no difference in prepartum liver triglyceride (TG); postpartum liver TG was decreased for cows on the N treatment compared with cows on the S treatment, but was similar for cows on the T and S treatments. Postpartum NEFA was similar between cows on the T and S treatments, but was greater for cows on the S treatment than for cows on the N treatment. Postpartum glucose was greater for cows on the N treatment compared with cows on the S treatment and tended to be greater for cows on the S treatment than for cows on the T treatment. There was no difference in postpartum solids-corrected milk (SCM) production or DMI by cows on the T vs. S treatment. However, there was a tendency toward lower postpartum SCM production by cows on the N vs. S treatment and a tendency for greater postpartum DMI by cows on the N vs. S treatment. Postpartum EB was greater for cows on the S vs. T treatment and the N vs. S treatment. In general, T and S management schemes had similar effects on DMI, SCM, and metabolic variables in the first 70 d of the subsequent lactation. Eliminating the DP improved energy and metabolic status.     

Xylosidases associated with the cell surface of Penicillium herquei IFO 4674

Penicillium herquei IFO 4674 is a filamentous fungus that produces a large amount of hydrolases for fibrous polysaccharides. We purified two beta-xylosidases, S1 and S2. The molecular masses of S1 and S2 determined by MALDI-TOF-MS were 103,700 and 37,460 Da. The optimum pHs of S1 and S2 were 4.0 and 6.5, respectively. By several kinds of alcohols, especially glycerol, S1 was activated while S2 was unaffected or inhibited. S1 had a transxylosylation activity, while S2 did not. The s2 gene encoding xylosidase S2 was cloned by PCR with primers designed on the basis of partial amino acid sequences of S2. The s2 consisted of 1005 by encoding 335 amino acids (37,433 Da) and had no secretion signal sequence. The deduced amino acid sequence shows a high identity to that of Bacteroides ovatus xylosidase/arabinosidase (56%), which is a member of the family 43 glycoside hydrolase.     

Sulfur speciation in soil by S K-Edge XANES spectroscopy: comparison of spectral deconvolution and linear combination fitting

Defined, quartz-diluted mixtures of sulfur (S) compounds with different oxidation state (OS) were analyzed by K-edge XANES spectroscopy using linear combination fitting (LCF) and spectrum deconvolution by fitting several Gaussian and arctangent functions (GCF). Additionally, for different soils the S speciation as calculated by both methods was compared with results of a wet-chemical S speciation. For mixtures of FeS, L-cysteine, and Na2SO4, the S speciation was recovered with satisfactory accuracy and precision by both methods at the 2 and 0.2 mg S g(-1) level. For GCF, white-line peaks must be normalized with respect to their OS-specific absorption cross-section. LCF must be conducted with dilute reference compounds to avoid self-absorption effects. For mixtures of FeS, FeS2, S°, and L-cysteine, both procedures showed poor accuracy. For the soils, similar percentages of reduced inorganic S, organic S, and sulfate were calculated by LCF, GCF, and wet chemical S speciation. GCF allows a fair estimation of S species groups with different OS (inorganic reduced S, organic reduced S, organic intermediate S, oxidized S) in soils without standards. If dilute standards of all S compounds assumed to be present in a sample are available, LCF is more objective and allows a more detailed S speciation.     

南美白对虾养殖水体5株疑似病原菌的分离与初步鉴定

应用TCBS(硫柠胆蔗琼脂)培养基从上海金山区南美白对虾(Litopenaeus vannamei)养殖水体中分离筛选出5株优势疑似病原菌(编号为S1、S2、S3、S4、S5),应用ARDRA图谱分析、ERIC-PCR分析结合16S rD- NA的PCR扩增与测序等多相分子生物学方法对其进行了鉴定。结果表明,S1为Pseudomonas属细菌;S2为Leclercia属细菌;S3为Exihuobacterium属细菌;S4为Jeotgalibacillus属细菌;S5为Staphylococcus属细菌。GenBank登录号为EU251039～EU251043。其中S2、S3、S4是首次从南美白对虾养殖水体中分离出来的疑似病原菌。结果还表明,TCBS培养基并非专一性选择培养弧菌的培养基,其他疑似病原菌也可以在该培养基中生长。     

应用多重PCR快速鉴定自然发酵肉制品中6 种葡萄球菌

肉葡萄球菌（Staphylococcus carnosus）、木糖葡萄球菌（S. xylosus）、腐生葡萄球菌（S. saprophyticus）、表皮葡萄球菌（S. epidermidis）、马胃葡萄球菌（S. equorum）和松鼠葡萄球菌（S. sciuri）是发酵肉制品中常见的葡萄球菌,为准确、快速地检测和鉴定这些菌种,建立6?种葡萄球菌的多重聚合酶链式反应（polymerase chain reaction,PCR）方法并进行验证。以上述菌种的gap、rpoB、SodA和SNc为靶基因,设计和筛选菌种特异性引物6?对,优化PCR体系,建立6?种葡萄球菌的多重PCR鉴定方法。实验结果显示多重PCR的基因组DNA检测灵敏度可达到4?pg,活菌检测灵敏度可达到2×102?CFU;采用建立的多重PCR方法对传统肉制品中分离的8?株葡萄球菌进行鉴定,结果与16S rDNA序列分析、生理生化鉴定结果一致。建立的多重PCR方法具有较高的种间特异性,可快速、准确地用于发酵肉制品中肉葡萄球菌、木糖葡萄球菌、表皮葡萄球菌、马胃葡萄球菌、松鼠葡萄球菌和腐生葡萄球菌的检测和鉴定,具有较好的应用前景。     

The influence of Lactobacillus plantarum culture inoculation on the fate of Staphylococcus aureus and Salmonella typhimurium in Montasio cheese.

The growth and survival of Staphylococcus aureus and Salmonella typhimurium were investigated during the manufacturing and ripening of raw milk Montasio cheese. Initial inoculated populations in the cheese milk were about 10(5) cfu/ml for S. aureus and 10(6) cfu/ml for S. typhimurium. Samples of curds and cheeses were taken during manufacturing and storage and analysed for pH and microbial populations. S. aureus increased slightly in number during the early period of ripening and attained a population of about 10(6) cfu/ml during the remaining period of storage. S. typhimurium decreased during cheesemaking and storage but persisted through 90 days. The addition of Lactobacillus plantarum culture (0.2% v/v) produced a marked reduction in populations of the test strains in 10 days of storage. Enterotoxin A was not detected in Montasio cheese even with a S. aureus population of 1.1 X 10(7) cfu/ml. L. plantarum strains were also tested by the spot method and the associative growth approach for their antagonistic activity against S. aureus and S. typhimurium. The compound excreted by L. plantarum was active only toward S. aureus. Furthermore, its activity was destroyed by protease treatment. These results indicated that while the growth of S. typhimurium is reduced by the acid production, S. aureus inhibition can be ascribed to bacteriocin production.     

SLIME PRODUCTION AND DNase ACTIVITY OF STAPHYLOCOCCI ISOLATED FROM RAW MILK

In this study, 851 Staphylococci isolates isolated from 38 raw milk samples were investigated for DNase activity and slime production. The 851 Staphylococci isolates were identified as 704 Staphylococcus aureus and 147 coagulase-negative staphylococci. Coagulase – negative staphylococci isolates were classified as 32.7% S. cohnii, 19.7% S. hominis, 19.1% S. xylosus, 12.9% S. epidermidis, 8.2% S. capitis, 4.8% S. haemolyticus, 1.4% S. simulans and 1.4% S. saprophyticus by using Dichotomous scheme. DNase agar was used to investigate for DNase activity. DNase activity was found in 93.6% of 704 S. aureus and 10.2% of 147 coagulase – negative staphylococci. DNase activity was positive in 42.9% of S. haemolyticus, 20.7% of S. hominis, 17.9% of S. xylosus and 2.1% of S. cohnii isolates. No DNase activity was found in S. epidermidis, S. capitis, S. simulans and S. saprophyticus isolates. Slime production of S. aureus and coagulase – negative staphylococci from raw milk samples was investigated by using Congo Red Agar method. Slime production was positive in 5.1% of S. aureus and 42.2% of 147 coagulase – negative staphylococci. Slime production was positive in 100% of S. simulans, 68.4% of S. epidermidis, 50% of S. cohnii, 50% of S. saprophyticus, 37.9% of S. hominis, 32.1% of S. xylosus and 16.7% of S. capitis isolates. None of the 7 S. haemolyticus isolates had slime production. In conclusion, slime production and DNase activity are important virulence factors to identify pathogenic staphylococci.     

Effect of ascorbate, nitrate and nitrite on the amount of flavour compounds produced from leucine by Staphylococcus xylosus and Staphylococcus carnosus

Resting cells of Staphylococcus xylosus and S. carnosus were incubated with ascorbate, nitrate and nitrite in defined reaction medium and their degradation of (3)H-labelled leucine into methyl-branched catabolites were studied using HPLC/radiometric detection. The experiments were carried out with and without addition of α-ketoglutarate. The main catabolic product of leucine degradation was 3-methylbutanoic acid but also small amounts of α-hydroxy isocaproic acid were produced. Nitrite addition lowered the concentration of 3-methylbutanoic acid for both Staphylococcus species and this effect was strongly amplified by ascorbate for S. xylosus but not for S. carnosus. For both species ascorbate alone had little if any effect. Also nitrate lowered the concentration of 3-methylbutanoic acid for S. xylosus. The concentration of α-hydroxy isocaproic acid was, however, increased by addition of nitrite and nitrate for S. xylosus. Addition of α-ketoglutarate generally increased the concentration of 3-methylbutanoic acid for both S. xylosus and S. carnosus.