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This paper aims to focus on the utilisation of pre- and probiotics for oral care and the state of knowledge at this time.

Pre- and probiotics describe beneficial carbohydrates and microbiota, respectively, for optimal gut health. Carbohydrates provide energy selectively for the gut-friendly bacteria. The use of both carbohydrates and bacteria is, however, being expanded into other areas of the body – including the skin, vagina and oral cavity – for health-related applications.

There is increased interest in both pre- and probiotics for oral care products. The importance of oral microflora and their selective substrates is discussed against a background of contemporary oral care approaches. The issues and benefits are discussed in this review.

It is clear that consumption of prebiotics and probiotics may play a role as potential prophylactic or therapeutic agents for reducing the presence of organisms in the mouth associated with tooth decay. To confirm a beneficial effect of pre- and probiotics further in vivo studies involving healthy human volunteers should be considered.

This paper aims to evaluate the effect of depolymerised glucomannan in regulating blood lipid and glucose concentrations.

Twenty adult volunteers were recruited. Blood samples were taken at Day 0. The volunteers consumed drinks containing 3.0 g active glucomannan hydrolysates (AMH) for 14 days, after which time blood samples were retaken (Day 15). Blood samples were analysed to determine the blood lipid and glucose concentrations.

The average fasting blood glucose at the start of the trial was 2.54 mmol/L but reduced slightly to 2.49 mmol/L after consumption of the glucomannan. The total average cholesterol at the start of the trial was higher (6.69 mmol/L) than desirable ( < 5.0 mmol/L). This was reduced after consuming the glucomannan to 6.44 mmol/L (3.74 per cent). The triglyceride content was also higher initially than recommended (2.88 mmol/L) but was reduced by 11.5 per cent. The high-density lipoprotein (HDL) was within the desirable range before and after consumption (1.57 and 1.52 mmol/L, respectively), while the average low-density lipoprotein (LDL) was higher than recommended ( < 3.0 mmol/L), representing 4.55 mmol/L and 4.40 mmol/L before and after consumption, respectively. Both parameters were reduced by over 3.0 per cent. The consumption of the glucomannan hydrolysates also reduced the total cholesterol/HDL and LDL/HDL ratios.

The AMH was effective in lowering blood cholesterol and glucose concentrations. Consumption of such carbohydrates could prove useful for these physiological disorders. Further studies are desirable to characterise the exact mechanism.

Human space exploration to date has been limited to low Earth orbit and the moon. The International Space Station (ISS) provides a unique opportunity for researchers to prove out the technologies that will enable humans to safely live and work in space for longer periods and venture farther into the solar system. The ability to manufacture parts in-space rather than launch them from earth represents a fundamental shift in the current risk and logistics paradigm for human space exploration. The purpose of this mission is to prove out the fused deposition modeling (FDM) process in the microgravity environment, evaluate microgravity effects on the materials manufactured, and provide the first demonstration of on-demand manufacturing for space exploration.

In 2014, NASA, in cooperation with Made in Space, Inc., launched a 3D printer to the ISS with the goal of evaluating the effect of microgravity on the fused deposition modeling (FDM) process and prove out the technology for use on long duration, long endurance missions where it could leveraged to reduce logistics requirements and enhance crew safety by enabling a rapid response capability. This paper presents the results of testing of the first phase of prints from the technology demonstration mission, where 21 parts where printed on orbit and compared against analogous specimens produced using the printer prior to its launch to ISS.

Mechanical properties, dimensional variations, structural differences and chemical composition for ground and flight specimens are reported. Hypotheses to explain differences observed in ground and flight prints are also developed. Phase II print operations, which took place in June and July of 2016, and ground-based studies using a printer identical to the hardware on ISS, will serve to answer remaining questions about the phase I data set. Based on Phase I analyses, operating the FDM process in microgravity has no substantive effect on the material produced.

Demonstrates that there is no discernable, engineering significant effect on operation of FDM in microgravity. Implication is that material characterization activities for this application can be ground-based.

Summary of results of testing of parts from the first operation of 3D printing in a microgravity environment.

INDUSTRIALLY the two ‘in’ words today seem to be participation and consensus, the first leading to the second. How these can become a reality in modern business was discussed recently by the London Region of the Institute of Work Study Practitioners.

Considers the growth and development of the temporary worker within the workforce and looks at the advantages and disadvantages this brings. Cites common characteristics found in this area and provides a brief case study. Covers the legal implications and the importance of employee classification under Equal Employment Opportunity Commission guidelines. Briefly outlines new developments in this area.

The study of arms control and disarmament is a subject of renewed interest in the United States. The attention of academicians, politicians, and average citizens, focused by a fear of nuclear holocaust, has turned to questions of how best to seek peace and safety in the nuclear age. Courses and programs devoted to arms control and disarmament and methods of achieving peaceful resolution of conflicts in today's world are offered at all educational levels, and the general public, aware of the necessity of being well‐informed on such an important topic, is looking for ways to obtain factual and reliable information to help sort out the conflicting claims of political spokespeople. Such material does exist and should be available to researchers, professors, students, and citizens, so that they can form opinions and attempt to influence policy on the basis of a sound understanding.

The way of thought and vision and memory is that they often come upon you unexpectedly, presenting nothing new but usually with a clarity and emphasis that it all seems new. This will sometimes happen after a long period of indecision or when things are extremely difficult, as they have long been for the country, in most homes and among ordinary individuals. Watching one's life savings dwindle away, the nest‐egg laid down for security in an uncertain world, is a frightening process. This has happened to the nation, once the richest in the world, and ot its elderly people, most of them taught the habit of saving in early youth. We are also taught that what has been is past changing; the clock cannot be put back, and the largesse—much of it going to unprincipled spongers—distributed by a spendthrift Government as token relief is no answer, not even to present difficulties. The response can only come by a change of heart in those whose brutal selfishness have caused it all; and this may be a long time in coming. In the meantime, it is a useful exercise to consider our assets, to recognize those which must be protected at all costs and upon which, when sanity returns, the future depends.

A recent meeting involved co‐operation with the organisers of the Canadian High Technology Show and the local Chapter of the SMTA. The programme included an inspiring keynote address by Mr Frank J. Pipp, Xerox Corporation. The topic of the address was ‘Malcolm Baldridge National Quality Control and the Evaluation of Total Quality Control in Xerox Corporation.’

The main ingredients are soya flour, separated milk powder and oatmeal. In some mixtures vitamin concentrates are included. In theory they are admirable, but the chief objection to soup as a meal for a child is that it is difficult to get 1,000 calories into the stomach, even with a good hunk of bread. Thick soup is too filling. It is excellent for emergency use, as experience with the Ministry of Food canned thick soups has shown under “blitz” conditions. But, on bread and thick soup, a child feels full before it has eaten the 1,000 calories it is desirable to get into him. Health of children is, from all reports, whether from public, private or elementary schools, remarkably good. We were not a little worried at this time last year about the adequacy of the supply of first‐class protein for growing boys and girls. The position is now reasonably satisfactory and every effort is being made to see that what is required for development of muscle and bone shall be provided. You, Sir, have on numerous occasions emphasised your determination to see that the younger generations shall not suffer as the younger generations suffered in the last war from diet deficiencies. The spirit that has moved you to take that firm stand will be a powerful force in the post‐war period. I can foresee, and hope to live to see, the day when every child in the country shall be able to get a good nourishing meal at school if the parents so wish. There is another important aspect of this vast expansion of the school feeding programme. The proper planning of school meals is only one way in which the child will benefit. Education in the simple facts of food values will be an essential part of the school. Impressions formed in the minds of these young people will last their lifetime. That is fully recognised in America, where a big concerted drive is about to begin to put nutrition propaganda before every section of the nation. It is true that food habits of a lifetime are sometimes hard to change. Whether they are based on long‐established custom or deep‐rooted fallacies, or both, they are not readily given up by adults. No better illustration could be given than the reluctance of the mass of the people to purchase wheatmeal bread when there was a choice between that and the ordinary white loaf. On the one hand we were urged to force wheatmeal bread down the throats of the people and were assured that they would like it when they came to understand that it was good for them. At the other extreme we were emphatically told that the public actively disliked a dark loaf. My own impression, from a close study of the matter, is that the majority of people are “conditioned,” to use a much overworked word, to white bread and give little thought to other variety. They are certainly apathetic to any appeals based on food values. Most people go into a shop, ask for a loaf of bread, get a white one, as has always been the case unless brown were specifically asked for, and give no more thought to the matter. A striking example of this indifference has been provided recently in America, where there has been extensive commercial development of the manufacture of white flour “fortified” by additions of synthetic vitamins. Large‐scale production has been in progress for about a year. At first the public, stimulated by a vigorous publicity, bought the new type of bread. Sales rapidly mounted. That it was largely novelty rather than vitamins that sold the bread in the first instance appears to be shown by the steady fall in sales that has recently occurred. Had the public as a whole actively disliked bread that is not white, as we were so often assured, it would have been reasonable to expect a volume of protest when National Bread came into general use. No such reaction occurred. On the other hand, favourable comment has been widespread. The war‐time nutrition policy that aimed at improving the food value of bread either by use of long‐extraction flours or artificial reinforcement will certainly be reflected in post‐war developments. What line they will take is not yet clear. It is certain, I believe, that minimum requirements, at least in respect to vitamin B1, will be laid down. Whether particular methods of manufacture will be specified is another question. In this connection it is appropriate to mention that a new method of milling wheat has been devised as a result of collaboration in Canada between the Government Cereals Research Department, certain milling interests and an enthusiastic pioneer who is leading Canada's nutrition “drive,” Dr. F. Tisdall, of Toronto. This method yields a flour, as rich in vitamin B1 as an 85 per cent. wheatmeal and containing considerably more of other important nutrients of the wheat berry than the ordinary type of wheat flour. If there is a public taste in regard to the whiteness of its flour, and if it is of real significance, we have here what appears to be the perfect compromise because the new Canadian flour—to be known officially as “Canada Approved”—is truly white. In passing, I may add that to encourage the production of this type of flour in Canada the addition of synthetic vitamin B1 to white flour has been made illegal. But although we must admit a large measure of resistance in adults to new ideas about food I by no means share the view that it is always a matter of the greatest difficulty to change their food habits. Twenty years ago, perhaps even ten, a workman who openly drank a glass of milk in front of his mates would have had to face a barrage of appropriately phrased ridicule. America led the way with its encouragement of milk in factories. When the war broke out we were rapidly following her lead. Milk was being drunk in considerable and increasing volume in factories. People no longer stopped to stare if they saw a big, husky navvy drinking from a bottle of milk. We were told, when we tried to get vegetable salads into workers' canteens, to make good the loss of vitamin C which is almost unpreventable in large‐scale cooking, that the “hands” would not touch them. They didn't, when little or no effort was made to explain in simple terms what they were for or to serve them attractively. The conventional idea that salads can consist only of lettuce, cucumber and tomato and that they are only to be eaten with cold meat was hard to uproot. But, wherever canteen supervisors have taken even moderate pains to encourage people to try salads—and I am speaking of war‐time salads of shredded cabbage, grated carrot, potatoes, etc.—there has been a record of success. Of course, everything depends on who runs the canteen. In one factory in London it was found not only possible, but a simple task, to make a midday meal of the “Oslo” type popular in summer months, even with men doing relatively heavy work. The serving of a helping of vegetable salad as part of the meal has proved a success in a number of communal restaurants. It is invariably eaten and most people like the innovation. If it were offered as a separate item relatively few would ask for it, merely because they are unaccustomed to do so. This small helping of fresh vegetables is of very great nutritional importance. Large‐scale cooking in restaurant kitchens involves serious losses of vitamin C. Some are caused by vegetables being prepared and left soaking many hours before they are cooked, sometimes overnight. Even more serious losses occur during cooking. Finally, cooked vegetables which have to be kept hot for several hours suffer a further serious reduction in the amount of ascorbic acid. The result is that instead of providing at least 25 mg. of vitamin C, as we would like it to do, an ordinary canteen meal may contain no more than 5·20 mg., particularly in winter months. It is all very well for the nutritional expert to tell us that by taking certain precautions and modifying the methods of cooking vegetables a large proportion of this loss can be prevented. The hard fact is that it is exceedingly difficult, sometimes quite impracticable, to change the organisation and routine of a large kitchen. We know of no means of preventing loss of C when cooked vegetables are kept hot in insulated containers, as is frequently necessary. In four hours the ascorbic acid content of a helping of cooked potatoes can fall from about 6 mg. to 2 mg., and that of one of “greens” from 25 mg. to 10 mg.; losses, that is, of the order of 60 per cent. The small helping of vegetable salad overcomes the difficulty. We have found that there is relatively a small loss when fresh vegetables are shredded or grated. A helping of about 3–4 ozs. of mixed chopped cabbage, carrot, turnip and beetroot gives from 20 to 40 mg. of vitamin C: an amount ample for the average person's daily need. We are trying very hard through the medium of propaganda by the Ministry of Food and Board of Education to make the people salad‐conscious; in the hope that salads will become an accepted part of the daily meals of an increasing number of families, schools, institutions and hospitals. If the movement really gains good ground during the war period, when the choice is so restricted, it should spread rapidly when normal times come and the green‐grocer's shops show once again the rich variety of produce from home and overseas. It has been a hard, uphill fight to make “the man in the street” believe that garden vegetables are a good substitute for fruit, in the nutritional sense. I think we have made good progress, but there are many still unconverted. It is important that the truth of this matter should be widely known. Of the fruits we ate in ordinary times only oranges, grapefruit, blackcurrants, redcurrants, gooseberries and strawberries are particularly good sources of C. Apples, pears, bananas, cherries and plums are relatively poor in this respect. When most of these fruits are unobtainable, as at present, it is important to know that we can easily obtain our vitamin C from cabbage and sprouts, cauliflower and broccoli. We recently published, in collaboration with Dr. H. V. Taylor, of the Ministry of Agriculture, tables showing that a well‐cultivated allotment of the regulation size of ten rods, a mere 300 sq. yards, will provide all the vitamin C required for a family of four during each month of the year, even after liberal allowances for wastage and cooking losses. Moreover, the same crops will provide no less than half the vitamin A required by a family of that size. No stronger evidence of the immense value of an allotment could be produced. It will be a thousand pities if every effort is not made to sustain the allotment movement to the greatest possible extent after the war. After the last war the area cultivated in this manner fell rapidly as parks, building sites and other grounds were taken back for their original purpose. Of necessity, much land will have to be given up when peace comes again, but if our post‐war world, is, as Sir Stafford Cripps remarked on Sunday last, to be “consciously planned for better living conditions,” the immense national importance of allotments must not be ignored as it was in the “reconstruction” after 1918. Nor do I feel we should regard the British Restaurant as a temporary war‐time expedient. There will doubtless be a certain amount of agitation after the war directed towards their abolition.

This conference was the second in the National Physical Laboratory series focusing in turn on each of the non‐CFC options for de‐fluxing soldered electronics assemblies. The first conference was on Controlled Atmosphere Soldering and the third will be on New Solvents.